Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums RF Cafe Homepage Thank you for visiting RF Cafe!

How to Set Even- and Odd-Mode Excitations in HFSS? - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


godsound
 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.


 
   
 
UWB_antenna_guy
 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


 
   
 
AP
 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

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line