RF Limiter Simulation in ADS

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wwshr87

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I'm trying to simulate a single stage RF limiter in ADS using the PIN_diode model. I have attached the topology that shows up on the PIN diode (CLA4601) limiter schematic. I would expect that as the input power increases at some power level it will start limiting. However, I'm always getting Pout=Pin.
I suspect the PIN diode is not self biasing as it should. If I use a DC bias on the diode it will limit the output power as expect. If someone can explain what concept I'm missing here.

Thanks!
 

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You have to do large signal analysis not small signal analysis.
 
Last edited:

Thank you for the suggestion. I used large signal analysis (LSSP) and RF Limiter is working as expected.
 

Do you have a reference I can read that explains the different simulations in ADS and when to use them? I bought the book "RF and Microwave Circuit Design: Updated and Revised with 100 Keysight (ADS) Workspaces", I think that would be a good reference. Also, any good books about RF design in general.

Thanks!
 

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