about tima and frequency domain

[aaliah_rf]

about time and frequency domain

Hello!!

i want to understand, what do we mean by studing or characterize an antenna in Time domain and frequency domain

thank you

 

[jiripolivka]

Antennas are typically studied in frequency domain as most systems using them are narrow-band. Ultrawideband system, to the contrary, need similar antennas, and such are studied by their time response or domain; they are fed with very short pulses creating a very wide-band field.

 

[biff44]

to elaborate, if you go to the trouble of making something like a 200 pS wide pulse, you do not want the antenna turning it into a double hump, or some other shape distortion in the time domain.

So you really have to think thru what the phase vs frequency is doing to the time domain shape.

 

[aaliah_rf]

thank you jiripolivka & biff44, i still don't get the idea,
i'm working on smart UWB antennas, and i want to study them in time and frequency domain, just theoretically, so until now, i didn't understand how to do this properly
if u have any idea, or exampls, please show me

i will be so grateful