Learning Forum

[etorab2]

Hi, I have simulated a 1D leaky wave antenna in HFSS and I obtained some contradictory results:

1. Why is the accepted power (=0.88) less than the (1-|S11|^2)*incident power (=0.99)?
2. Why does removing the infinite GND decrease the gain by about 6 dB rather than 3 dB?
3. Why is the radiation efficiency 99% while |S21| is equal to -9 dB which means 33% of the accepted power is absorbed at port 2 and not radiated.

I would appreciate ay help. Thanks.

Best,

Elahe

[Praneeth]

Hi Elahe,

Thank you for reaching to us and we would appreciate your patience.

Please provide screenshots of your model along with setup information to help us serve you better.

Best regards,
Praneeth.