How to define a Coplanar Waveguide Port in HFSS

Status
Not open for further replies.
D

DDRio

Newbie level 3
Joined
Jun 27, 2004
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
36
define coplanar

Hi!

I'm trying to simulate a Folded Slot Antenna using CPW feed and I'm wondering what is the type of port that I need to use to define it as CPW port. As an attachment I include the HFSS file. I used a waveport and defined two modes for the two strips. But now I see the results and they do not look like the results on designer. In fact, they look extremely different. The main problem here is that I don't know how to define the port. I draw two rectangular strips on one of the faces and define an integration line on each of them.

Please take a look and let me know what I'm doing wrong. And if you are going to send files, send them to daviddrio@yahoo.com. I don't have enough points to download the attachments from this board.

Thank You!
 

hfss waveguide port

Hi,

First check if you're using a grounded or ungrounded cpw. Here are the rules of thumb that i have used with good results to define the box for my port:

ungrounded:
make box width=3(2g+w) and height= 4h (start a little below substrate)

grounded:
make box width=3(2g+w) and height=4h (starting at top of gnd plane)

where, w=width of center conductor, g=conductor spacing, h=substrate thickness

In both cases the box should be centered

good luck
 
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…