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how to simulate input impedance of a voltage doubler in ads

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zhiweisim

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Hi,

I have designed a voltage doubler circuit (for RFID application) using ADS. I would like to find out what is the input impedance of the circuit at different input power and frequency so that I can proceed with the design of an impedance matching network which will be placed in between a 50 ohm antenna and the voltage doubler. May I know how can I do that in ADS? Could anyone please help? Thanks.
 

Re: how to simulate input impedance of a voltage doubler in

Use the s-parameter simulation.
Go to Simulate>smart simulation choose 2 port network.
Once you finish simulation you can check the s11 smith chart, use the marker to go to the required frequency, It gives you s11 as well as zin
 

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