Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
What does a S-parameter larger than 1 means?
Posted 20 déc. 2015, 16:47 UTC−5 RF & Microwave Engineering Version 5.1 1 Reply
Please login with a confirmed email address before reporting spam
I have a structure with 2 ports and periodic boundaries on the walls. In one port, excitation is on and in the other one, it is off. When I compute, I get a s-parameter of 1.5 for the transmission. I use these:
abs(emw.S11)^2
and
abs(emw.S12)^2
How is it possible? What does it mean? Does anyone have any idea?
Thanks,
--
Hadi Maghsoudiganjeh
abs(emw.S11)^2
and
abs(emw.S12)^2
How is it possible? What does it mean? Does anyone have any idea?
Thanks,
--
Hadi Maghsoudiganjeh
1 Reply Last Post 20 déc. 2015, 18:31 UTC−5
Please login with a confirmed email address before reporting spam
Posted:
9 years ago
I agree that that shouldn't happen, but don't know why it did. Have you tried various changes in boundary conditions, meshes, element order, etc.? Have you looked at arrow-plots of the fields and power-flow directions? Have you reviewed your port specifications in detail, and considered using different kinds of ports? You may have set up some kind of pathological configuration.