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Defining Ports Dipole No Ground in Ansoft Designer? - 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


still learning
 Post subject: defining ports dipole no ground in Ansoft designer?
Posted: Thu Jun 30, 2005 7:43 am 
Hi

I'm want to know how I should define ports to my dipole antenna in Ansoft designer? THe antenna is made on top of an substrate with only ONE metal layer (signal layer), that means no ground layer.

How should I define my ports for this dipole when I don't have an ground?
I have tried in different ways but turned up in wrong simulations.

PLease give detailed help since the port options are quite many

Does any one have an example, project file demonstrating an simulation of an dipole without groundplane?

BR


 
  
 
malvinas2
 Post subject:
Posted: Mon Jul 04, 2005 8:54 am 
separate the dipole into two pieces of the same length (so normally each one has got lambda/4), the gap between them should be quite small. Now you can use voltage gap source as a port (have a look at the help "gap source").


 
  
 
umbfalco
 Post subject: define ports dipole in Ansoft Designer
Posted: Thu Jul 07, 2005 10:27 am 
 
Lieutenant
 

Joined: Mon Jun 27, 2005 6:01 am
Posts: 4
Location: Calabria - Italy
In EM Planar Designer select Layout --> Layers and define your substrate and dipole(Signal). After select layer and draw a rectangle(your dipole). Click Edit -->Select Edges and you must select the end of rectangle.Click Draw -->Edge Port. In the Project Manager you can see Excitations , Port1. Now you can Start Analysis

Ps: I'm sorry for my English!!! :lol:


 
   
 
Ebit
 Post subject:
Posted: Fri Aug 05, 2005 10:44 pm 
 
Lieutenant

Joined: Fri Aug 05, 2005 8:25 pm
Posts: 2
Location: Santa Barbara
Hello BR and others...

Did you ever successfully implement your (electric?) dipole problem?

If so would you mind sharing some od the details of your design.

I am trying to model a magnetic dipole in free space (see topic"Ansoft Design User Unite: Q on modeling a magnetic dipole" for more details) and I could use any suggestions or help.

Thanks
Ebit


 
   
 
Guest
 Post subject:
Posted: Tue Aug 09, 2005 12:58 pm 
Ebit wrote:
Hello BR and others...

Did you ever successfully implement your (electric?) dipole problem?

If so would you mind sharing some od the details of your design.

I am trying to model a magnetic dipole in free space (see topic"Ansoft Design User Unite: Q on modeling a magnetic dipole" for more details) and I could use any suggestions or help.

Thanks
Ebit


the (obvious) trick is to model the antenna exactly the way you measure it. Needless to say that you want to model the feedregion in your numerical model just like the experimental model. I assume you use a balun or an SMA endlauncher to feed the dipole? I don't have any problems modeling dipoles using HFSS




Posted  11/12/2012

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