Thank you so much! I need to listen to this again because there were many things pointed and it is totally worth the time spent. Much appreciated!

@BhargavaAnurag

2 жыл бұрын

Glad it was helpful!

Can't thank you enough Sir. Haven't seen this type of content anywhere.

@BhargavaAnurag

4 жыл бұрын

I am glad you liked it....

Really helpful tutorial which is exactly to the point on the topic

Most helpful video I have ever seen on youtube regarding RF stuff. Thanks, subscribed and liked.

@BhargavaAnurag

3 жыл бұрын

Welcome aboard!

Thank you for contribution to science and engineering. I truly appreciate you doing this.

@BhargavaAnurag

4 жыл бұрын

Thanks for your kind comments. I just hope more people subscribe to my channel and get benefited with the efforts and enhance their learning experience.

I have Designed RF PA using ADS ...refreshed my memories regarding ADS . Thanks for Sharing

@BhargavaAnurag

9 ай бұрын

You are most welcome

Thank you very much for your tutorial LNA design. That helps me learn a lot.

@BhargavaAnurag

3 жыл бұрын

You are welcome 😊

this was the topic I needed. thank you so much, Great work

@BhargavaAnurag

4 жыл бұрын

Glad it was helpful!

Great Explanation! I wanted to design the LAN by "hand" with some python scripts and smith chart but did not had the whole overview after reading books and application notes. With your explanation its much clearer now.

@BhargavaAnurag

Жыл бұрын

Glad it was helpful!

Just one word 'Excellent'

@BhargavaAnurag

3 жыл бұрын

Glad to know that you liked it...👍

Hi Anurag, You are my inspiration and my hero as far concern about RF simulations and its explanation

@BhargavaAnurag

6 ай бұрын

Thank you so much 😀

Well done! Excellent explanation. very valuable content for RF

@BhargavaAnurag

3 жыл бұрын

Glad it was helpful!

Thanks so much for these tutorials.

@BhargavaAnurag

3 жыл бұрын

Glad you like them!

Thank you for your exellent tutorial !

@BhargavaAnurag

3 жыл бұрын

Glad you like it!

Very good explanation sir,plz continue to share technically good stuff and present on different rf products like mixers,pa,filters,...design it will be help full to all

@BhargavaAnurag

3 жыл бұрын

Sure I will.. Thanks for watching...👍

Awesome, Keep Inspiring us Anurag Sir.!

@BhargavaAnurag

4 жыл бұрын

Appreciate your feedback...!! Enjoy the learning...

thankiuuuuu, fromm VietNam with love, that's an amazing video

@BhargavaAnurag

11 ай бұрын

Glad you liked it!

Loved it! Thank you!

@BhargavaAnurag

4 ай бұрын

You are so welcome!

the best video I have ever seen , thanks

@BhargavaAnurag

3 ай бұрын

Thanks for the feedback and I am glad you liked it..👍

Sir, I saw many videos all are well explained. thank you so much.

@BhargavaAnurag

Жыл бұрын

You are most welcome

Excellent Sir.Very well explained.This type of content is not available anywhere. Please start tutorials, related to MMIC design also.

@BhargavaAnurag

4 жыл бұрын

Sure I will...stay tuned and keep learning..!!

Very good initiative, really appreciate your efforts in sharing your knowledge

@BhargavaAnurag

Жыл бұрын

It's my pleasure

EXCELLENT VIDEO TUTORIAL SIR. VERY USEFUL TUTORIAL FOR THE RESEARCHERS

@BhargavaAnurag

4 жыл бұрын

Thanks and welcome

sir, Thank you for bringing this channel. you have given very good tips which we do not find in the text book I have simulated LNA using BJT and tested the board . can you talk more on the different biasing circuits and how to choose them.

@BhargavaAnurag

3 жыл бұрын

Hi, Thanks for your feedback. Hope your LNA worked the way you simulated, let me know the outcome or comparison between simulated and measured if you designed it after watching this video and following all the steps explained?

Outstanding Job.

@BhargavaAnurag

3 жыл бұрын

Thank you! Cheers!

Sir, Your tutorials are very encouraging for new learners...!! One small request, for upcoming videos, if possible please provide links in the description for previous video tutorials wherever you are mentioning it in the current tutorial..

@BhargavaAnurag

2 жыл бұрын

Hi Manish, I will try to do that, usually I always to one of the videos under "Learn ADS in 5mins" playlist for different videos for RF Design Tutorials and hopefully it is easier to figure it out based on the topic mentioned in the playlist.

Thank you, Sir for this wonderful lecture and covering the complete design strategy of LNA. Unique to this content is the stability network design. Because in most texts on LNA design, impedance matching of the active device under unconditionally stable condition is shown and not the strategies on the stability network. Therefore, you are right when you mentioned that this material is 'not available elsewhere' in the Introduction slide😀. Do let me know if this perspective is correct. Sincerely, naive MMIC designer

@BhargavaAnurag

Жыл бұрын

Hi Rahul, You picked up one of the many good points which aren't discussed in many books. Watch both of the LNA tutorials carefully and you will find many other points/topics like Stability...😊

Very " Excellent "

@BhargavaAnurag

3 жыл бұрын

Thanks for your feedback....👍

Excellent sir.please sir start also EMPro and Genesys tutorials as well. Thank you

@BhargavaAnurag

4 жыл бұрын

Sure I will

Hi Sir, thank you so much for these tutorial videos. If I may, I have a question. Would you not need a T-junction component in the schematic when adding the radial stub at the time-mark 50:20? Thanks beforehand!

@BhargavaAnurag

2 жыл бұрын

Yes, if you are using a radial stub in shunt then it is recommended to connect a MTEE there but it is not going to be a big problem even if you don't connect it as your RF will be largely isolated at that point.

Oh my god I am so thankful, you can't even imagine Sir, this video answered me a lot of questions.

@BhargavaAnurag

4 жыл бұрын

I am glad that it was of help to you...Keep learning...👍

You have really helped me a lot with this tutorial. Sir, I need a tutorial on how to plot the stability factor versus capacitance or resistance

@BhargavaAnurag

3 жыл бұрын

Hi Mawuli, You don't need a tutorial video for this. Here are the simple steps: 1. Define a variable on schematic e.g. myCap = 1 2. Assign the variable to the capacitor component on schematic which then might look like: C=myCap pF 3. Setup and run the parameter sweep 4. Insert the graph and select StabFact and click on "Add Vs" and then select myCap from the available options 5. Now you will have the plot of K vs. myCap as you need. Hope this helps

@mesmith5706

3 жыл бұрын

@@BhargavaAnurag Got it!! Great, in fact, I don't know how much I should thank you but I believe you shall surely reap the fruits of your kindness in the land of the living!

Thank you sir! It is so much info and very clear. How did you pin pick class A operation point on the DCIV curve please?

@BhargavaAnurag

2 жыл бұрын

I didn't understood the question completely. Class-A operating point is in kind of middle of your Ids-Vds curve on a specific Vgs value for the FET and that's how I picked it. Does it help to make things clear?

Sir thanks a lot for this tutorials

@BhargavaAnurag

3 жыл бұрын

You are most welcome

This is such a well organized video. Like you rightly said, text books are so voluminous that reading the details we can't easily get the design concept. I hope you continue making such videos for the benefit of the community. Hats off. Just one question. If I decide use a FET on a CMOS process, will the same specifications (NF, Gain) that you've showed here provided in the PDK?

@BhargavaAnurag

3 жыл бұрын

Loved your comment...!! Thanks for providing your feedback. For CMOS, you will have MOSFETs instead of FETs and NF will not be as good as what you see here because Silicon is a poor quality i.e. Noisy substrate for LNA and that is why mostly you will use Low Noise GaAs pHEMT process for LNA designs. Using CMOS PDK transistor models you can always find out the NFmin, Gain etc as shown in the video for sure... Silicon is quite a cheap & abundantly available material compared to GaAs plus you can have RF & Digital circuits on a single chip to design a complete SOC (System on Chip) for a Transceiver system. In practical systems such as Mobile Phones, you always have RF Front end module (known as RFFE modules) where PAs and LNAs are designed with GaAs processes, Switches using SOI and tons of SAW and BAW kind of filters for various bands etc) followed by Silicon-based Transceivers or Modems. Each technology has its pros & cons as you select the implementation based on the specification & size constraints on hand...!! Hope this helps in some manner....

@arunbrvce

3 жыл бұрын

@@BhargavaAnurag Thank you very much for a detailed and insightful response. I was curious of the question because I did my PhD on process engineering applied to LNAs on PD-SOI substrate. And because of specially engineered Trap-Rich SOI substrate, substrate effects can be significantly reduced compared to CMOS. From what I understand, heterogeneous integration is what is preferred for RF frontends incorporating different technologies. Also, what is your opinion about future of SOI? In my literature review, I found some examples of devices which I thought had really good noise performance. How does it compare to GaAs pHEMT? ieeexplore.ieee.org/abstract/document/7874382/ ieeexplore.ieee.org/abstract/document/8439132/

@BhargavaAnurag

3 жыл бұрын

Hi Arun, Thanks for pointing me to these references. I don't have much experience with these new processes as of now and looking at the current trends followed by major companies I can tell you III-V is still the preferred choice for LNA as well as PA and SOI is very popular for Switches in the RF Front End modules. But again its always good to be in know of the newer & upcoming technologies.

@Rahul-tg9gj

Жыл бұрын

@@arunbrvce Super observation. Thanks for sharing.

Great video as always Anurag, thanks for helping so many people in this interesting topic. Can you comment on (or give references to) why the shunt/series impedance improves the stability of the device?

@BhargavaAnurag

4 жыл бұрын

Hi Miguel, Thanks for your kind comment. For understanding how resistors improve the stability, you can refer to causes of Oscillations in a transistor & find out how to do oscillator designs and do exactly the reverse in amplifiers to prevent that a.ka. break the loop gain chain which might induce positive feedback....😊 In simple words, while designing amplifiers we need to dampen or kill the oscillations caused due to L & Cs and resistors are the perfect components to do that. Different devices work differently hence we need to try different values or topologies to achieve our goal. For more details, refer to this: www.mwrf.com/technologies/components/article/21846567/ensure-stability-in-amplifier-designs

@Miguelocod

4 жыл бұрын

@@BhargavaAnurag Thanks! Now it's clear

Hi Anurag, I think it is important to mention that noise fiqure is strictily defined as the ratio input SNR divided by output SNR when input noise temperature is 290 K. Otherwise, great video!

@BhargavaAnurag

3 жыл бұрын

Good point...refer to the video at 27:17 and you will realize that it was covered...😜 Thanks for the comment anyways and hope you enjoyed watching it....👍

Very useful video again from you. Thank you so much for those practical tips. One comment: I felt that you could have explained DC bias network creation more in detail :)

@BhargavaAnurag

4 жыл бұрын

Thanks for your comments. What else would you liked to see in Bias Network creation?

@satyat7051

3 жыл бұрын

@@BhargavaAnurag Appreciate your tutorial. These are questions I had: 1. For i/p, o/p microstrip in bias n/w, you mentioned 1-2mm length with 50Ω would be fine. So that will give around 40deg phase shift to input signal based on line calc result. Is that okay ? 2. You were saying 105Ω would be fine for lambda/4 line. I understand it wouldnt get too hot as FET will be drawing less current. But how would you know what is optimum impedance and how hot this microstrip would get ? Is it to be verified with 3D simulation ? 3. Doesn't Mstep add any electrical length to lamda/4 line before it ?

@BhargavaAnurag

3 жыл бұрын

@@satyat7051 Here are my comments to your queries: 1. There is no concern if these sections provide 40deg or whatever phase shift as we can always do the matching network according. Also, 1-2mm is a typical/general guidance and you need to know your own fab requirements to make sure components can be soldered, leads can be mounted etc. 2. More impedance the better to block the RF frequencies. There is no special need of 3D simulation, you just need to compute current carrying capacity of a Microstrip line as per the width and these formulas are there in any Microstrip text books like T.C. Edwards etc. 3. Mstep is only to account for discontinuity effect due to different widths at the junction and has an insignificant contribution to electrical length.

@satyat7051

3 жыл бұрын

Anurag Bhargava thank you for clarification. I will refer to the text book that you mentioned. I am interested to relate temp Vs current on microstrip line. . Again, Your tutorial is amazing :) I hope to see PA design also from you.

anurag sir you are great

@BhargavaAnurag

Ай бұрын

🙏

It is really useful

@BhargavaAnurag

Жыл бұрын

Glad to hear that

Please sir, is it possible to build a network of LNA(5.5GHz) and IF amp(300MHz) together in single circuit just like the circuit you have while doing the recap of LNA( that contains antenna and mixers)? If yes, please sir how can one go about it sir? Thank you in advance.

Sir, Thank you for giving a wonderful lecture video. This helps very RF engineers and academicians to know LNA in detail. I am designing a Microstrip Isolator, can u help me with how to include ferrite magnetic materials in the design? Give some book references for the design.

@BhargavaAnurag

Жыл бұрын

Unfortunately, I have nothing to help you.

Thank you very much .This video is very helpful for my project.Could you please tell me the design equations

@BhargavaAnurag

3 жыл бұрын

Hi Sandeep, There is no major equations I used here but you can surely find relevant equations in book like Gonzalez etc.

Thank you

@BhargavaAnurag

2 жыл бұрын

You're welcome

thanks so much

@BhargavaAnurag

3 жыл бұрын

You're welcome!

Thank you sir for such detailed videos on RF Circuit designing. I designed the LNA circuit mentioned in video but got "Warning detected by hpeesofsim during netlist flattening. Resistor `A1.RSSP' is shorted." this as warning because of which results are not coming. KIndly help.

@BhargavaAnurag

2 жыл бұрын

Hi, This warning is not normal but your results won't be affected by this. You need to check for other issues to figure out the problem with your results.

Thanks Sir.

@BhargavaAnurag

Жыл бұрын

Most welcome

Thank you sir

@BhargavaAnurag

2 жыл бұрын

Welcome

Hello, Thank you very much for this valuable tutorial. I have an S-parameter model of a transistor and not the device model. now I am wondering how to bias the model and adding transmission lines to create lambda/4 and other lumped components. as I see here, we need a bias circuit to connect to Gate and Drain nodes. while in an S2P block, I don't know how to implement this. finally, I want to generate the layout for fabrication but I don't know what is the starting point in this case ( S-parameter model) again thank you for your hints and helps

@BhargavaAnurag

3 жыл бұрын

Hi Ehsan, Process will be exactly the same with no change at all as shown in the video. Only difference would be that your circuit performance won't change if you change the bias voltage as you have only S2P file and output power will never compress and it will keep on increasing so there is no fun in doing HB simulation. You can skip the DC IV simulation part and go directly to stability analysis using the S2P file you have. Make sure S2P does have noise data else you won't be able to see Noise Figure which is important for LNA. You should still design the bias network and attach it to rest of your circuit. Port1 of S2P file will be gate (or Base for BJT) and Port2 will be Drain (or Collector for BJT).

@ehsanf1791

3 жыл бұрын

@@BhargavaAnurag hello Anurag, Thank you so much for information. I am working and studying on your design. Everything is ok so far, just i am a bit confused on the bias network cap section at the end of it where you have some pads and a capacitor parallel to it . Is it a kind of special thing ? I have seen different bias networks as chucking RF. Is there any hint or book for this area to read more and understand more to manipulate such designs ?

Thank you for this perfect tutorial. I didn't understand a point in Step4 bias NW. There is DC_Block just after TermG1 in schematic design, but you didn:'t put the DC block just after the Termg1 in the step4. So when you feed the circuit with DC_feed from the point between the MSTEP and MLIN-TL4, wont the DC current flow throughout the MLIN TL1 to the TermG1?

@BhargavaAnurag

3 жыл бұрын

Hi Sabri, Kindly have a look again and you will get answer. There is coupling capacitor between DC bias point and the Termination both at input and output side.

@sabriyilmaz5814

3 жыл бұрын

@@BhargavaAnurag Thank you for your response. One more question, isn't this FET P channel?

Hello, this very a good tutorial. I'm designing a low noise amplifier too and it's very difficult because I usually don't use ADS software. Do you also provide services for people who want to design and simulate LNA with ADS software? Thankyou..

@BhargavaAnurag

2 жыл бұрын

I don't offer such service. Which country are you based in and what specific help do you need?

Firstly, thank you for this tutorial video. I have some issues: 1) Could you turn on Subtitles (Auto Translation) for this video? Sometimes I can't hear clearly what you said. 2) What is the main purpose of Step 4_Bias Network Design and at 41:38? 3) What is the function of MSTEP, MTEE_ADS, MGAP ...? What happen if we don't use that components for modeling? Sorry if you explained this in the video but because of 1). Thanks you so much again.

@BhargavaAnurag

2 жыл бұрын

I can hear the audio properly, may be you can check your headphone/speaker settings. I tried to switch on Auto Captions, you can try to see if it works for you.

Hello Anurag, Thanks for sharing this video. A quick question, Series Resistance at the output will cause a drop in gain like you said. You still kept the 20 Ohm resistance at the output while introducing the shunt RC network. Can't we just remove the "R" at output and tune the input shunt RC network for stability?

@BhargavaAnurag

3 жыл бұрын

If you can achieve stability with only shunt RC then why not. However, that may be but difficult and eventually you will need to lower shunt resistance value and you will see similar loss. Putting series resistor in output is not all that bad as long as you do proper analysis to achieve required gain that you are looking for. It all depends on the device characteristics so designer will need to play with all the possible topologies and pick the one that gives best results.

@amithgani

3 жыл бұрын

@@BhargavaAnurag Thank you Anurag for that quick response. Really appreciate it.

I ask another question, i have to go back and forth with my design. i achived stability with my particular bias network and transistor but now my MAG is around -1.7 while it was around 20dB with the previous bias network (but unstable).. do you have a tutorial to design the network to optimize for gain with an stable system? thanks

@BhargavaAnurag

2 жыл бұрын

I am not sure how gain can drop from 20dB to -1.7dB and this indicates there is some problem in the way you configured your network. Whatever I showed in this video is to stabilize device first as well as keeping an eye on the Gain as well. Kindly relook at your design and hopefully you will be able to figure out the root cause of the issue.

Hello Mr Anurag. Pls guide us as how to go about designing an amplifier(low noise ) to detect a microvolts signal in series with a resistor .The design should be at 10KHz.The desig and simulation in ADS.

@BhargavaAnurag

3 жыл бұрын

HI Manish, I would recommend you to contact local Keysight Tech Support for this request

sir! does microstrip line technology is easy process to do? because I'm as a engineering finale year student, doing LNA design for the 1st time...in ADS as you shown in this video. Is it achievable?

@BhargavaAnurag

3 жыл бұрын

Hi Prasanna, Microstrip is the easiest printed line process. Whatever I showed you in the LNA design is surely achievable and I talked about all practical considerations that you need to take during the design.

thank you for video. sir i have one doubt that if i have a datasheet of gan HEMT and want to use in ads then you told we can use it through s2p. but i have doubt how to assign gate source and drain terminal to that box(snp) or how i understand which terminal is gate source drain (like there will 1 2 and ref terminal.).

@kirtires.scholarelectronic7021

Жыл бұрын

yes sir this is my doubt also.

@BhargavaAnurag

Жыл бұрын

Its usually provided in the header of the S-Par file. However, the typical normal is 1: Gate, 2: Drain and 3: Source (reference) for all HEMT or FET devices.

Thank you very much sir for sharing all these videos. Sir it would be very kind of you if you could make some videos on PIN Diode models.

@BhargavaAnurag

2 жыл бұрын

Hi Shilpa, I couldn't understand the exact message of yours. Do you want to see how a real electrical modeling for a PIN diode is done like a device modeling exercise or a PIN diode can be used in circuit design or something else?

@shilparana3783

2 жыл бұрын

@@BhargavaAnurag Sir I want to see how a real electrical modeling for a PIN diode is done as I don't have access to PIN diode component library.

@BhargavaAnurag

2 жыл бұрын

Hi Shilpa, Any device modeling is a very complex field and you shouldn't do it just because you want a single model. You can always contact device manufacturers to obtain a non-linear model for the PIN diode and there are many ways they can give you the model that can be used in ADS e.g. SPICE model can be imported, Table based model parameters can be entered in the non linear diode component etc etc...

@Anurag Bhargava Dear Sir, I have gone through LNA tutorial 9-10 videos but it could not solve the problem. First, you used series resistance at the input and output sides separately. Then, you deactivated input resistance, and connected RC network towards the ground. The values were picked previously and there was no information for derivation. Best regards.

@BhargavaAnurag

2 жыл бұрын

I showed concept of placing resistor at different places and its impact on the noise figure so don't get confused with that. In an ideal case you can place resistor on the output side for LNA and if device is not fully stabilized then shunt resistor can be used in series to capacitor (to avoid DC) but the resistor value should be as high as possible to avoid resistive loading which will degrade noise figure so its all about balancing the different parameters like gain, noise figure, stability etc

congatulations for this topic, it is really helpfully, I am from latin america, could you recomend a book about this videos. with more detail because some parts i cant understand clearly.

@BhargavaAnurag

3 жыл бұрын

Hi, For normal Amplifier technology and theory, you can always refer to books like Gonzalez but those books don't talk about the practical implementation of the amplifier which I tried to cover in the video but if you want to understand the theory and concepts then those are excellent...If you have any specific query then you can post them and I can try to answer those.

Hi.. thanks for this helpful video,... i have a question if we are going to design a cmos amplifier with many transistors and resistors, etc...., how can I simulate it (with a model)

@BhargavaAnurag

Жыл бұрын

You just need to include the PDK of the transistor/process you need to use.

@khalfallahcherifi3535

Жыл бұрын

@@BhargavaAnurag thank you very much

Thank SIr. How can i download this presentation? I like that!

@BhargavaAnurag

3 жыл бұрын

Hi Hung, I am glad you liked the presentation. Unfortunately, there are no slides for you to download as of now. You can pause video at every slide and take snapshot to create your own copy. Hope this helps in some manner.

Excellent tutorial sir. Thankyou very much sir for the lesson. Sir i was wondering if you can help me out with 2 stage amplifier design for a mmic designer.

@BhargavaAnurag

3 жыл бұрын

Hi Nishant, I don't have bandwidth to support an actual design as a consultant but you would definitely find consultants in India and elsewhere to help you on paid basis depending upon scope of work. Doing 2 stage or 3- stage design is not so difficult if you keep following the fundamentals and take care of interstage matching and stability of your circuit.

Can you explain the Lamba/4 practically? Also which transistor can you use 23-30 GHz design?

@BhargavaAnurag

4 жыл бұрын

Hi, I am not sure what you meant by explaining the lamda/4 practically? I showed the same in Part2 of the video in EM-Circuit excitation section. Please watch it to get more context or just use Smith Chart tool in ADS to see how lamda/4 behaves. Put Zs or Zl as 0 or 9999 and then use a transmission line and see what happens if you insert a 90deg line i.e. lamda/4. For 23-30 GHz, I am not aware of any discrete transistors available. Best I have seen is till 18-20 GHz, www.mitsubishielectric-mesh.com/products/pdf/mgf4965bm_1211.pdf Beyond 20GHz, your board and assembly parasitics will be too hard to contain and it is recommended to design using a suitable MMIC process. Hope this helps in some manner...

What are the changes we need to do to circuit to make it work ah high frequency (let f=60GHz)

@BhargavaAnurag

3 жыл бұрын

Hi Vinod, For 60 GHz, you will need to design via IC process either in GaAs or Si. It can't be done using PCB technology.

Sir plz cover some more topics..like filter design attenuator,IF amplifier

@BhargavaAnurag

3 жыл бұрын

Sure 👍

Great Video. Sir please help me how to import the PDK file into ADS because it always shows the warning or error invalid lib path. How to remove the error or import the PDK into ADS.

@BhargavaAnurag

3 жыл бұрын

Kindly see this: kzread.info/dash/bejne/iJpqxriEfNvLZLA.html

Thank you Sir for the remarkable effort and exceptional content. Just one question: our frequency is 2.4 GHz and therefor lambda=124 mm and lambda/4=31 mm, your design is 100% correct but I can't understand why the quarter wavelength line's length in your design is 19.8 mm.

@BhargavaAnurag

2 ай бұрын

Divide it by sqrt(Er) to get guided wavelength…🙂

@mohammedmansour685

2 ай бұрын

@@BhargavaAnurag THANK A LOT

Hello dear Anurag It's nice 👌

@BhargavaAnurag

3 жыл бұрын

Hey, thanks

Could you please tell me at which tutorial you talk about inserting array of vias? You mentioned in the video that you have tutorial about it

@BhargavaAnurag

3 жыл бұрын

Hi Ali, Please refer to videos 41-43 under Learn ADS in 5mins playlist to get full context of it. For via array, you simply draw 1 VIA of desired diameter/radius and then use Edit->Copy/Paste and select option of Step & Repeat to enter X & Y values etc... Hope this helps.

@aliesmaili3213

3 жыл бұрын

@@BhargavaAnurag Thanks for your reply It was really helpful👌👌

Can anyone suggest me a good book for LNA design?

Sir please make a video on the designing of a Power amplifier using GaN

@BhargavaAnurag

3 жыл бұрын

That's the plan for early next year...

Hello! thanks for your work, my i askyou.. while running the same circuit in my computer i dont get any of the mu or muprime graphs... why that could be? Thanks

@BhargavaAnurag

3 жыл бұрын

Hi Sergio, I am not sure why that might happen but I know one of the ADS version had a bug for the same. If you use newer/latest ADS release, it should all work fine for you.

@sergioruppel7269

3 жыл бұрын

@@BhargavaAnurag Thanks for your time answering my question. I just found it was because i had to create the chart in the first place and then select the parameters to load in (Mu and MiPrime). Have another question if you have the time.. Im trying to design a RadioTelescope as my final project for my engineering degree, right now i cannot find the same transistor as you are using here, but limited to some NPN BJT i can find. Do you have rocomendations about the topology? or different steps to do the analisis for the LNA? Thanks again for your time. BTW using ADS 2016

@BhargavaAnurag

3 жыл бұрын

@@sergioruppel7269 You can get the transistor I used in the library provided in the ADS: C:\Program Files\Keysight\ADS2016\oalibs\componentLib folder. Copy the RF Transistor zip file in your project folder, unzip it and then add this design kit like any other library in ADS and you should be able to get ATF21170 transistor for your use. You can see how to add vendor components from this video: kzread.info/dash/bejne/iJpqxriEfNvLZLA.html Topology using NPN BJT will also be very similar except that you will use a current source in the Base instead of a voltage source like I used for the FET device.

Sir, Thank you very much... Can you please make a video on power divider.(n way splitter)

@BhargavaAnurag

4 жыл бұрын

What do mean by n way splitter? can you be little more specific?

@itsraky951

4 жыл бұрын

@@BhargavaAnurag sir 2,4,8,16...way power divider

@BhargavaAnurag

4 жыл бұрын

Got it...will try to cover in future tutorials...!!

An excellent tutorial, but I wonder that what is purpose of using radial stub in the biasing network, Sir?

@BhargavaAnurag

3 жыл бұрын

Hi, I think I explained that during relevant section. Kindly listen to that section again but here is the quick comment: Its is open circuit stub so it provides short at connection point in the lamda/4 bias line which gets transformed to Open circuit in the bias line to avoid leaking desired RF into the bias line. This is optional and not mandatory but if you don't have it then you need to be careful about compensating for the delta electrical distance caused due to the decoupling capacitor mounting pads etc because ground/short is available on the far end of these capacitors which you are utilizing to realize the open circuit for desired RF freq with lamda/4 line. Hope this helps...

@annguyendang8388

3 жыл бұрын

Thanks Sir, I have another question! In your biasing line design, it is terminated with two terminals 50 ohm and provides good S11 and S21. But the impedance at input and output sides is not 50-50 Ohm because input and output impedances of the device are not 50 ohm, whether the biasing network works well? or how to ensure open circuit for the biasing line with such the impedances.

@BhargavaAnurag

3 жыл бұрын

@@annguyendang8388 Biasing network is being analyzed in reference to 50Ohm to make sure it works perfectly on its own and be as transparent as it can be. It necessarily has nothing to do with matching network which you will have to match the transistor impedance to 50Ohm. However, in some cases like in PA output section you may include it to be part of the output matching network. Eventually, when you design matching network, you look at cascaded impedance for device + bias network and that becomes your impedance matching network design goal. Hope this helps in some manner.

Thank you so much for this tutorial. I'm a newbie in ADS. Could you tell me how can I get the Workspace (in tab Folder View), like at 20:28?

@BhargavaAnurag

2 жыл бұрын

Before watching videos in this playlist, kindly spend some time watching these: kzread.info/head/PL9OnCetH8TYrWFGB4QkDP8HVaY-Aum6Hc

@BhargavaAnurag

2 жыл бұрын

You could simply right click and create any number of folders and then drag and drop designs, data display under specific folder as needed.

@OXYMedia

2 жыл бұрын

Thanks for your enthusiasm. I mean how can I get the Part1, Part2 and Part3 folder at Workspace (like at 20:28)? I will need to do it by myself or if you have links to download it?

@BhargavaAnurag

2 жыл бұрын

I have created step by step tutorial with step clearly explained and demonstrated so that designers will be able to do it on their own by putting their own efforts...😊

@OXYMedia

2 жыл бұрын

@@BhargavaAnurag Thank you so much!

Sir,you didn't mention anything about design equations you used.can you please mention them so that I can use them for designing lna for 1-3GHz

@BhargavaAnurag

3 жыл бұрын

Hi Karanam, As you can see I haven't used any equations during the design process. You need to apply fundamentals and if you want 2GHz wide BW LNA on 2 GHz center frequency that is 1 octave BW based design so might be quite difficult on a PCB and MMIC might be more suitable process for the same but again it depends on what specification you are looking for. Its all about Broadband matching network design and whether selected transistor gives you good enough parameters to design such broadband LNA. Check out Broadband Impedance Matching tutorial video to get some more understanding....

We're waiting for MMIC LNA design.

@BhargavaAnurag

Жыл бұрын

You and me both! Will upload as long as my schedule allows as it is a pretty involved topic

hi sir....tutorials are very useful....i have doubt sir,....How to convert lumped element to microstrip.. inductor converted to microstrip and same as capacitor....

@BhargavaAnurag

2 жыл бұрын

Hi Udaya, There is no direct method as such but you could use Reverse Engg method as explained in video 21 under Learn ADS in 5mins playlist

Nice video, can i get calculation of this lna design

@BhargavaAnurag

2 жыл бұрын

Hi Manini, I am not pretty sure what do you mean by the calculation of this LNA design?

Hello Anurag , Another question regarding LNA design . How do you decide the value of choke and dc blocking capacitor for lower frequencies ?

@BhargavaAnurag

3 жыл бұрын

Hi Amith, You just need to remember that you have to isolate DC and RF in the DC bias section and the prime objective to let DC pass and block any RF energy so you pick a choke or inductor that can give you SRF around your RF as at SRF (Self Resonant Freq) it will have parallel resonance offering the best possible resistance to prevent RF leaking into the DC section, other factor includes to have low ESR to avoid DC drop etc. But some people make it part of their matching network criteria change a little bit so its subjective to what topology you want to work with. Similarly, DC blocking Cap commonly referred as coupling capacitors in the path of RF ideally should have SRF (Series Resonant Frequency) at RF frequency to give you least resistance in the main path but then it all depends how you decide to use this as some time we use it as part of the matching network (like I did in LNA video) then you go with any value suitable for matching application to kill 2 birds with single stone. Prime objective is to block the DC which any Capacitor value will do and then whatever other purpose you may want to use it for and then come up with value accordingly. Look for some App Note on this topic for more details, I remember there were some nice ones from MACOM, NXP etc Hope this helps....👍

@amithgani

3 жыл бұрын

@@BhargavaAnurag thank you so much.

please explain how to calculate the width and length for the quarter-wave MLIN block in Step 4 that is connected to the Microstrip Tee. I don't get accurate results with my calculations for its length.

@BhargavaAnurag

Ай бұрын

Use LineCalc in ADS. Typically 85Ohm or higher is considered to be good enough for bias line applications.

@retro_hd_

Ай бұрын

@@BhargavaAnurag Thank you for your response. I got it to work with 50 ohms back then with -37dB return loss.

Do it with AWR too. If possible

@BhargavaAnurag

2 жыл бұрын

Sorry but I don't use that tool.

Thanks a lot for this tutorial, I could not figure out how the 90deg and 50 Ohms became 1.1 width and 19.8 length. I have used LinkCalc and the result was 18.6 length and 1.07 width, ??

@BhargavaAnurag

2 жыл бұрын

Kindly check the dielectric parameters carefully. If not, just proceed with what you obtained as it will not cause a major issue in your design work.

@muhammedarramadan9383

2 жыл бұрын

I checked the dielectric parameters carefully and test both results, Your results was the most suitable to the case, even the linkcalc was not the same Most of thanks,

@muhammedarramadan9383

2 жыл бұрын

Yes, now it is ok, I did not notice that the electric Impedance should be 105 Ohms Is there any reason (specific reason) of choosing that value? (105)

Sir, can I get the license of ADS for myself ? Without involving institute ? As most of the content on Keysight website get restricted when I select my country.

@BhargavaAnurag

4 жыл бұрын

You can always apply for the 30-days evaluation license on the ADS webpage.

Sir I am quite new to RF design and trying to design for my university project. So this is my question. 1. i am designing push pull class B amplifier in frequency of 1GhZ below. Is it necessary for me to create Bias network design to replace the dc and rf choke ? 2. If it is not necessary, how to know the right value for capacitor and inductor to put in my dc block and rf choke? Any formula? 3. For the Tlines that connecting to each devices, what is the rule of thumb (range) for choosing the length and width of each T line.

@mohdzainal5303

3 жыл бұрын

I mean MLIN not Tlines :)

@BhargavaAnurag

3 жыл бұрын

Hi, For freq below 1GHz, you don't need to use MLINs for bias network as you will easily find chokes/inductors for RF blocking purposes. Kindly google for app notes from vendors like NXP and you will find good papers on the same.

Sir, after I unzip the design kit and click ok when the dialog box appears if I want to add, there are no libraries or schematic added to my workspace. What should I do?

@BhargavaAnurag

Жыл бұрын

not sure what you are doing wrong. Kindly contact your local Keysight tech support team to show the problem you are facing and they can offer solution.

hellow i have some problem in first step when i show the characters of the transistor and run simulation this message appear Warning detected by hpeesofsim during netlist flattening.Resistor `A1.RSSP' is shorted.' please help me..

@BhargavaAnurag

3 жыл бұрын

Hi, You can ignore that warning and proceed.

I cant download the workspace. Can yu provide the link for downloading the workspace?

@BhargavaAnurag

Жыл бұрын

It is available at the link provided in the video description. To download the workspace, you need to be a valid Keysight customer and create a Knowledge Center login account for yourself. Please contact your local Keysight tech support team for help.

Sir, you already told that you'll upload the full tutorial to design a broadband RF power amplifier including load pull, source pull simulation to determine optimum load & source impedance of the transistor with the use of ADS software on november. But still there is no tutorial about it. Can you please do it within few days. We are really in the nead of it because of our research project.

@BhargavaAnurag

3 жыл бұрын

Probably you haven't turned on the notifications for my KZread channel. I already post 2 videos on PA design and will post the final one next week. Kindly check Tutorial 16 and 17 under RF Design Tutorials playlist and for future make sure notifications are switched on so that you are always notified about the new video uploads...

@user-nt4nm4fb3u

3 жыл бұрын

@@BhargavaAnurag thank you sir, sorry for inconvenience. I'm turning on the notification now.

Sir.. can You provide the link for AFT21170 PDK non linear model download ?

@BhargavaAnurag

Жыл бұрын

Its already included in the ADS library. Watch video carefully again on how to add this library in your workspace else this video 9 & 10 will help you as well: kzread.info/head/PL9OnCetH8TYrWFGB4QkDP8HVaY-Aum6Hc

Thank you? Could you help please? You are said, that frequency is 2,4Ghz and lambda/4 line is 19.8mm? How is it possible if lamda for 2.4GHz is 0,125m? 0,125m/4=0,031m

@BhargavaAnurag

11 ай бұрын

I am not sure which formula are you using? Try this: lambda (in mm) = 300/(freq_in_GHz*sqrt(Er)) so if you take freq as 2.4 GHz and Er=4 then the calculation will be: Lambda (in mm) = 300/(2.4*sqrt(4)) = 62.5 mm i.e. lambda/4 = 62.5/4 = 15.625mm Hope this clarifies...😊

@KolesnikAleksey

11 ай бұрын

@@BhargavaAnurag, yes. Thank you very much!

Hello Sir Anurag ! Hello everybody ! Need help on the following I setup s-parameter simulation of ATF-21170, i get a warning message "Resistor A1.RSSP is shorted" why this warning is appearing ? and how to remove it ? Commnet please

@BhargavaAnurag

3 жыл бұрын

Kindly ignore the warning message, that’s normal.

@pinkey6314

3 жыл бұрын

@@BhargavaAnurag sir thanks a lot for quick and kind reply

Can I import BFP740FESD FET transistor in ADS,I am unable to that.

@BhargavaAnurag

6 ай бұрын

It seems to be a low noise transistor for LNA applications. If so, you don't need a full non-linear model and you can design LNA by just having S2P file with noise parameter data that transistor vendor can provide to you or it might be available on their website

Sir, ATF-21170 is a NMOS or a PMOS device?

@BhargavaAnurag

2 жыл бұрын

Its MESFET device and not NMOS or PMOS

@eeengineers3958

2 жыл бұрын

@@BhargavaAnurag okay sir. Thank you ❤️❤️❤️

Hello sir. I need to design a broadband LNA that covers 1-6GHz frequency as I am replicating a competition paper where they had used TGA2602 SM (Qorvo) transistor in cascade (the concept was consume more dc to achieve broadband performance) but transistor ADS deign kit and its equivalent model is not given by Qorvo and S2p file contains data without Noise data. We discussed about that in comment section as well. So, I need to go for replacement transistor. Can your please suggest me a replacement transistor that can be used for broadband LNA design and also its ADS model will available by vendor's. The design specs are: broadband LNA (1 to 6 GHz), Gain: 13dB, Noise Figure

@BhargavaAnurag

3 жыл бұрын

Hi Adnan, You should be able to find suitable transistor from other vendors or from Qorvo themselves and you can always request them to give S2P file with Noise data. You need to do literature search and look for devices from Infineon etc

@adnannadeem6223

3 жыл бұрын

@@BhargavaAnurag Yes sir I have found an RF BJT transistor from Infineon and few from other vendors as well and their design kits are also available on ADS. Can you please guide me if I want to achieve a broadband bandwidth of more than 3 GHz for an LNA what approach should I adopt. Please guide me in context for achieving broad bandwidth

Sir ,I have one concern ,at mmW frequency ,what type of resistor should be used for providing stability of the device..can be use thin film resistor or simple resister of 15 ohm..?

@BhargavaAnurag

3 жыл бұрын

both should work. Resistors usually are not frequency dependent but be careful in not sucking up too much of gain/power while using them.

@saurabhshukla1490

3 жыл бұрын

I have seen some thin film resistor in TLine microstrip pallete..there is given some equation...RS( freq)=Rs√freq..how to use that equation at higher frequency??. according to that equation sheet resistance may vary at higher frequency...I don't think show ..it may not give a good agreement between simulation and measurement results..

@BhargavaAnurag

3 жыл бұрын

Hi Saurabh, For thin film at such high frequency, I wouldn't recommend to use schematic model. You should define the correct stackup with correct material properties in layout and then create a parametric EM component for yourself to be used in your design.

@saurabhshukla1490

3 жыл бұрын

Thanks a lot sir for the guidance..

If you are using S2P file for the transistor, you don't need to bias the gate voltage right?

@BhargavaAnurag

3 жыл бұрын

You don't need to bias anything in that case but you still got to design the bias network in schematic and layout to make sure there is nothing wrong with the overall design and impact on the RF performance.

@mfonuko7420

3 жыл бұрын

@@BhargavaAnurag Thanks so much. Watching your videos systematically. I have another question: Do you apply both gate voltage and drain voltage or just the drain with S2P?

@BhargavaAnurag

3 жыл бұрын

@@mfonuko7420 you don't apply any voltage if you are using S2P file as file is already extracted for a fixed Gate and Drain bias/voltage

@mfonuko7420

3 жыл бұрын

Anurag Bhargava Wow Thank you so much. I’m learning a lot from you. Thank you.

Hello sir I want to design a 60 ghz LNA using 90 nm Mosfet. Can you guide me from where to start?

@BhargavaAnurag

3 жыл бұрын

Hi, I don't plan a video on that any time soon but you will find some relevant info online from other people....👍

@skgupta563

3 жыл бұрын

@@BhargavaAnurag I looked for online but I can't find any source that explain it from scratch like from mathematical equations to design.

Hi Anurag, I hope you have time to write a book design Low Noise Amplifier, and Power Amplifier from A to Z . If you do that many people are happy for your helps. I will buy two books .Thank you for your tutorial.

@BhargavaAnurag

2 жыл бұрын

Hi Victordat, Writing a book requires much more effort hence I am sticking to creating videos for now...😊 Hope you watched the PA design tutorials as well...👍

@victordatdo9880

2 жыл бұрын

@@BhargavaAnurag Hi Anura, Thank you your time to read and reply my email. I have many friends watch your videos, all of them agree with me , your videos detail,clear practical. The detail very important for people beginning learn ADS . For example in Video #9 (LNA Design) you showed how to active the component ATF21170 from ADS library. If you did not show the new person learning ADS could not follow you to finish the Design Low Noise Amplifier. Again. Thank you very much you contributed your knowledge for tutorials.

@BhargavaAnurag

2 жыл бұрын

@@victordatdo9880 Appreciate your feedback....👍