radiation resistance of dipole antenna

Hi,

how do i obtain the radiation resistance of my dipole simulation using HFSS??

Thanks

Cheers

If you have non loosy dipole, the rad. resistance is equal to R=Re{Zin}.
For loosy cases you have to calculate the radiation resistance from far field distribution

cheers

eirp

Hi,

Where to obtain Zin?? Under the "Solution Data" function?

What does the Z matrix represent?

Actually I'm trying to verify my half-wave dipole simulation by checking the radiation resistance= 73 ohm.


Cheers
huiyuzz

Hi,
If your port Characterictics Impedance is Zo, the Zin will be as below:
Zin = Z0*(1+S11)/(1-S11)
this function can be defined simply in Output Varible menu from Trace menu.

Regards
KMPA

Hello

I've calculated your dipole's impedance using CST MWS coz I'm more familiar with it.
The results fit. Theoretical 1st resonance (for inf. thin dipole) should appear at 97.4MHz, predicted by MWS is shown at 90.7MHz (decreased because your dipole is of finite thickness)

Radiation resistance at first resonance is calculated 76.12 Ohm.

Cheers,

eirp

the HFSS can calculate the Zin ,please check the post data process carefully

Hi,

I've managed to simulate my Zin plot against Frequency. My radiation boundary is insufficient as ..eirp says

Thank You ..eirp and ..KMPA.

Cheers
huiyuzz

My project.