Antenna - Theory .com: The Antenna Site

Antenna Basics Antenna Types Smith Charts Antenna Measurements

antenna-theory.com :: View topic - VSWR(measured by Input impedance) and S11 is different
antenna-theory.com Forum Index antenna-theory.com
Antenna Theory
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

VSWR(measured by Input impedance) and S11 is different

 
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory
View previous topic :: View next topic  
Author Message
baby_1
Antenna-Theory.com Newbie


Joined: 23 Feb 2016
Posts: 2

PostPosted: Fri Feb 26, 2016 1:39 pm    Post subject: VSWR(measured by Input impedance) and S11 is different Reply with quote

Hello
I designed a simple corner reflector with HFSS and I set terminal impedance to 75 ohm.Here is my Hfss output S11 and input impedance of my antenna.

(So at F=8 Gighz we have S11=Gama=10^(-10.7358/20)=.2905

(as you see at the F=8Ghz image part is approximately around 0 and so we have Gama=(31.91-75)/(75+31.91)=-.403

Gama=-((ZL-Z0)/(ZL+Z0))

both of them are so different !!!! what is my mistake?[/img]
Back to top
View user's profile Send private message
helix
Antenna Theory Regular


Joined: 29 Jan 2015
Posts: 64

PostPosted: Sat Feb 27, 2016 3:14 pm    Post subject: Reply with quote

ZL = R + jX, and X is nonzero at 8GHz
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group