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power delivered to the antenna - HFSS

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joskem

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Hello,

Does anyone know how I can tune the power delivered to the antenna in HFSS? I have designed a patch antenna with coaxial feed. I want the delivered power to be equal to 1W. How can I fix that?
Thanks!
 

The question is not clear. You first may want to design an impedance matching circuit with an almost real input impedance, e.g. 50 ohm,
unless the patch antenna can't be designed to have already the intended input impedance. Than you apply a voltage that results in 1 W
power delivered to this impedance, e.g. 7V RMS to 50 ohm.
 

Hi!

Thanks for your answer. Yes, I have created a coaxial feed with a 50Ohm characteristic impedance. But how can I set the voltage value to 7V rms? I don't know how this is done in HFSS :(
 

right click on the HFSS field overlay to select "edit sources"
the the power delivered to the antenna is
solved magnitude(1 W default) x scaling factor x (1-|S11|^2).
Change the scaling factor to make the delivered power 1 watt.
 

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