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.

Problem with simulating antenna in CST

Status
Not open for further replies.

snkhan

Full Member level 6
Joined
Oct 19, 2005
Messages
324
Helped
38
Reputation
74
Reaction score
20
Trophy points
1,298
Location
Gods place
Activity points
3,213
I have tried to simulate in CST but S11 is totally different see the CST design attachment. 50ohm coaxial cable is used to feed on other side of ground plane.

Parameters
Disk radius:12.5mm with patch thickness of .4mm
FGap:.4~.7mm
Ground plane:100x100mm
 

Pushhead

Full Member level 4
Joined
Jan 19, 2005
Messages
198
Helped
20
Reputation
40
Reaction score
10
Trophy points
1,298
Activity points
1,870
Re: CST antenna problem

Hi snkhan,

I've simulated the antenna according to the paper's dimensions.
There is some difference, but all in all the results seem to be OK.

Are you getting a whole different response ?

Regards,
P.
 

antboy

Junior Member level 3
Joined
Nov 13, 2005
Messages
26
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,445
Re: CST antenna problem

try to check the backgound materials
 

Pushhead

Full Member level 4
Joined
Jan 19, 2005
Messages
198
Helped
20
Reputation
40
Reaction score
10
Trophy points
1,298
Activity points
1,870
Re: CST antenna problem

Here's the model and result file.

Results included are:

1. S11
2. Azimuth and elevation cuts.
3. Z and Y matrices
4. Model script.

Regards,
P.
 

snkhan

Full Member level 6
Joined
Oct 19, 2005
Messages
324
Helped
38
Reputation
74
Reaction score
20
Trophy points
1,298
Location
Gods place
Activity points
3,213
Re: CST antenna problem

Hi Pushhead:
It was so nice of you to help me, so here are few more questions for you.
1) How to define Azimuth and elevation cuts in 1D results
2) Can u explain a little what is the impact of defining add space as it makes results quite different "Actually this was the mistake with my design".
3) A little on Model script

Thanks verymuch:D
 

Pushhead

Full Member level 4
Joined
Jan 19, 2005
Messages
198
Helped
20
Reputation
40
Reaction score
10
Trophy points
1,298
Activity points
1,870
Re: CST antenna problem

I'm glad i could help.

1. The radiation pattern cuts are derived from the full 3D farfield results. You should go to Farfield results -> Plot properties.
Once you've extracted the desired cut, copy the plot (Ctrl+C), go to 1D-results ->Add new folder -> Paste (CTrl+V).
BTW: That works for any 1D-result you have...

2. There are many aspects for setting the correct boundaries to a specific problem so I won't elaborate on this. In your case the farfield calculation might have changed because of this.

3. What exactly do you want to know about my script?

Regards,
P.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top