Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

radiation boundary about HFSS!

Status
Not open for further replies.
S

snowboy

Newbie level 6
Joined
Dec 27, 2005
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,383
when I modal a open transition such as microstrip,I found that the result of S21 of the modal with radiation boundary around is smaller than that with a non-radiation air box around.
for example.
radiation boundary existing: S21 equal to -2.4dB
non-radiation air box existing: S21 equal to -1.0dB

which result is correct?who can give me some ideas?
thank you
 

Here are a couple of ideas:

1. Move the radiation boundary further away from the transmission line so that it is not interfering with any reactive fields. You don't want it leaching off the fields.

2. Move the PEC boundary further away so that it isn't interfering with the reactive fields. You don't want fields bouncing off the metal boundary.

3. Examine the fields for cutplanes normal to the transmission line. Verify that the fields are showing what you expected.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top