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s-parameters

 
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Mehdi.
Antenna-Theory.com Newbie


Joined: 08 Apr 2011
Posts: 4

PostPosted: Sat Jul 09, 2011 3:27 pm    Post subject: s-parameters Reply with quote

hllo
I would like to know one thing:
if I have a patch antenna ,and when I calculate the s parameters , what is the meaning of these parameters for the patch antenna?
is there a difference when I want to calculate in the board, or in the middle?
how do i , if i want to calculate with matlab??
thank you very much , and i await your help...please please detail detail
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Schubert
Antenna Wizard


Joined: 08 Apr 2009
Posts: 161

PostPosted: Sat Jul 09, 2011 6:53 pm    Post subject: Reply with quote

If you have a single patch antenna, then you will look at S11. This is the reflection coefficient. So you have some transmission circuit from the radio or wherever, and you measure the impedance of the antenna, Zin. S11 tells you how much power is reflected from your transmitter (usually 50 Ohms).
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