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  1. #1
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    How to add dimensions to the components in ADS Layout?

    Hi everyone --

    I have designed a filter using discrete components in ADS and I am now trying to design the microstrip lines to interconnect all of the parts. I've used Linecalc to determine the width needed for a 50 ohm microstrip line (given my particular substrate). Now I am sort of lost. I don't want to just throw microstrip lines in the circuit, I want to use a little sense, heh. Are there any guidelines to follow? I am really new to the subject so I kind of tried to position them in a way that should work. I don't want to get any coupling effects (from lines being too close together)...etc..

    Also when I generate the layout from the schematic using ADS it looks like a big jumbled mess. This is partly because some of my components don't have a physical size added to them. Is there a way to add these dimensions to the components (say using the Coilcraft ADS library for their inductors), or do I have to space the lines perfectly in the layout section. If I did that, could I run simulations with momentum?

    If any of you have any tutorials I would really appreciate it. I've searched all over and I can't find anything that relates to microstrip interconnect design with discrete components.

    Thanks,

    Sam

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  2. #2
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    Re: ADS Layout Help

    Probably you biggest issue will be the Frequency you are working at.
    If it's too high your performance will greatly differ from your simulation.

    If you're around 1GHz you can just put all components as close as possible
    and that would have little effect.

    ADS does have some components with "ART WORK" that will go in to
    Momentum, but it's not always easy or correct. If you can call the ADS
    Tech support they will be the best help.

    Cheers



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  3. #3
    Newbie level 3
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    Re: ADS Layout Help

    Thank you very much!

    Yeah, it's a tunable filter (using PIN diodes) from 20 MHz to 1 GHz. I figured the effects of the traces shouldn't be too bad at those frequencies.

    Thanks again. If I find a good way of adding dimensions to parts from their tech support I'll be sure to post it :)



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