Custom Search
Over 10000 Pages Indexed
Your Host
Click here to read about RF CafeKirt
Blattenberger

... single-
handedly
redefining
what an
engineering website
should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5CCG (5th MOB):
My USAF radar shop

Hobby & Fun

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse
riding business website -
lots of info

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe©

RF Cafe E-Mail

how to set even- and odd-mode excitations in HFSS? - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: how to set even- and odd-mode excitations in HFSS?
Posted: Mon Jan 23, 2006 7:41 am 
 
Lieutenant

Joined: Mon Jan 23, 2006 7:34 am
Posts: 1
Hi all,

I have been recently trying to simulate a pair of coupled striplines in HFSS. I tried but failed to obtain the coupled lines' characteristic impedance and relative dielectric constant for even-mode (Zoe, Epsilon-re)and odd-mode (Zoo, Epsilon-ro) excitations.

I set two wave ports on two ends of the coupled lines. In each port, I set two terminal lines so that I could use the terminal lines' directions to represent the even-mode and odd-mode. But in this way, even though there were still two wave ports, the S-parameter I obtained was a 4-port one but not my wanted 2-port one. Besides, from E-field distribution, I found the above way couldn't seperate the even- and odd-mode. The E-field distribution for same terminals' directions is almost same as that for opposite terminals' directions.

Does anyone know how to use HFSS to simulate the coupled striplines or make even- and odd-mode excitations? would you please give me some advice and tips? I greatly appreciate your precious assistance.


 
   
 
 Post subject:
Posted: Tue Jan 24, 2006 1:37 pm 
 
Colonel
User avatar

Joined: Tue Aug 09, 2005 1:07 pm
Posts: 28
there are examples in the training material. Basically, what you need to do is to go to HFSS->Excitations->Assign

Depending on the port/solution type, you can adjust the amplitudes of each port


 
   
 
 Post subject:
Posted: Wed Jan 25, 2006 3:34 pm 
I don't think the previous answer understood the question - what you have to do is allow more than one mode per port. Then look at the fields in a port-only solution - one of the modes should be even, and the other should be odd. If you do a ports-only solution, you will be able to see the impedance for each mode. Then, for transmission, you only have 2 ports, but each will have 2 modes, so you have S-parameters like P1M1-P2M2 (port one mode one to port 2 mode 2) etc, etc.



Posted  11/12/2012
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel