RF Design-28: SMA-RF Board Assembly and Analysis - Part 3

[@djgandb553]

Hello Sir, first of all thank you for your videos which are very informative. I tried to simulate in RFPRO a set of box and connector in which I put an antenna and launched an FEM simulation. I have results with the antenna alone or the antenna with the connector, however as soon as I simulate the whole thing I have an error saying that the meshing has failed. where can this error come from please? thank you for your feedback.

[@BhargavaAnurag]

@@djgandb553 great going. The issue you described can’t be resolved on YT chat and would recommend you to contact Keysight tech support by writing to: [e-mail]

[@djgandb553]

@@BhargavaAnurag thank you sir! i had already solve the problem, i had overlaping mesh. everuthing is fine now. i have another question. why i have a great difference between Em simulaton and FEM simuation?

[@LeeJaebuom]

Hello sir. Thank you for your great job. I have a trouble following your video. you insert "EMpro 3D component" to RFpro in last step of video.(27:18) but in my case can't find that menu(file>insert). just 2 choice(file>save, close) exist. can you help me?

[@BhargavaAnurag]

It seems you are using old version of ADS? I would recommend to use whatever latest version you can.

[@arijitdas1884]

Hello Anurag Sir. Thanks for the video on cavity resonance impact! Usually what I have seen that if the length and width dimension of the cavity are comparitvely small, the Eigen mode Frequencies comes up at frequencies close to or higher than 10-15 GHz, in which case we need not worry about the cavity if our passband is below 4-5 GHz correct? Also, let's say cavity resonance is not impacting our passband performance, (proven through Eigen mode simulation), but we still end up finding some unexpected peaks in the S parameter measured plots (which we didn't find in our simulated results at design stage, where we took all care in modelling the layout and its parastitics), then can you suggest what can be the possible causes for getting such peaks?

[@BhargavaAnurag]

Its difficult to comment without seeing what kind of peaks you are seeing. Cavity resonance is only one of cause of distortion but other probable cause include assembly tolerances, SMA connector etc. You might need to relook at all the aspects of the design & assembly if you are seeing any unexpected peaks

[@asefrro8296]

Filter has no GND layer, am I seeing right? Could you tell more about it?

[@huseyinurigulmez]

Yes. In general, suspended substrate stripline filters have no GND layer.

[@asefrro8296]

@@huseyinurigulmez Thanks

[@BhargavaAnurag]

No, the filter demonstrated has Cover Plate at the bottom that you can see when I discussed about the filter stackup. Try to watch the video again ~1.40min and you will get your answer

[@fistdoom]

Hello sir, How to perform RF link budget analysis in ADS, What video of yours should I watch?

[@fistdoom]

I know! SystemVue!

[@BhargavaAnurag]

SystemVue is the best choice to perform Budget Analysis and in ADS 2024U1 you now have the capability to use RF System Explorer which brings all the cool features of SystemVue to be accessed from inside ADS...😊

[@fistdoom]

Thank you!@@BhargavaAnurag