Patch Antenna Design Using Sonnet v3.2

Designs a probe fed rectangular patch antenna using true electromagnetic simulation.

Description

The program uses Sonnet or SonnetLite (the free version) to perform electromagnetic simulation on a probe fed, rectangular patch antenna. The design of the antenna is modified between Sonnet simulations. This design modification, simulation cycle is repeated until the antenna performs as intended.

This is version 3.2 of "Electromagnetic Design of a Probe Fed Patch Antenna". The original program has been significantly extended to allow for lossy conductors and substrates.

The purpose of this program is to demonstrate, a simple GUI, Registry searching, calling external programs, simple optimization, file I/O, customized plotting, etc.

This Program Works As Follows:
1) The GUI "SonnetAntennaDesignGUI.m" is run.
2) A GUI prompting the user to enter in the desired antenna performance is initialized.
3) Upon entering the data, the main program starts.
4) The user is prompted for the location where the desired version of Sonnet is installed on the system. Sonnet is an electromagnetic simulation program - SonnetLite is it's free version. Sonnet can be found at

http://www.sonnetsoftware.com

5) An initial antenna design is generated.
6) The design is written to a Sonnet Project File, and Sonnet is invoked.
7) After simulation, the antenna performance is gauged, and the design is altered accordingly.
8) The new design is resubmitted to Sonnet.
9) This process is repeated until the antenna performs as desired.
10) The performance results are display.

The resulting design can actually be MANUFACTURED. The performance of the antenna will very likely be just as predicted.

BOTH patch length and probe position are optimized.

Use, modification, and extension of this program is encouraged.

Questions are welcome.

Serhend Arvas,
Syracuse University

sarvas @ syr.edu

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
SonnetLab Beginner Demo, SonnetLab Antenna Example, SonnetLab Single Stub Tutorial, SonnetLab Optimization Example

• MATLAB release: MATLAB 7.4 (R2007a)
• Other requirements: 1) Sonnet or SonnetLite (free) Tested on: WinXP PRO, WinXP Home, WinXP64, Windows Vista. Matlab 7.1, and Matlab 7.4

[shihu han]

Wonderful work! It is very useful for Co-simulation

[shihu han]

Wonderful work! It is very useful for Co-simulation

[madan mohan]

good

[Mike Willis]

It is probably excellent, but beware as it does not work with Matlab 6.5.

Matlab is too overpriced to keep buying the latestversion.

[Serhend Arvas]

This comment is in response to a question about how to adapt this program to filters.

This program is probably far more complex than you need.

It does much more than optimize an antenna.
It illustrates registry searching, talking to other programs (Sonnet), etc..

A few of the files are just designed to search the windows registry to find where sonnet is installed. Then it uses the most recent sonnet on the system to simulate. You don't need this.

Here's how I started this project.

First I made an antenna in sonnet (you'll make a filter).

Then I found the coordinates of the antenna in the .son file.

I replaced the coordinates, the permittivity, the loss tangent, etc. with the words VARIABLE01, VARIABLE02,... VARIABLEN.

Then, in matlab I made an array with these values in it.

Just before I called sonnet to run my .son simulation, I replaced all the VARIABLEN words with their values in Matlab.

Then I call sonnet from matlab.

When Sonnet it running it generates a lock file. When it is done, I think the lock file is erased. That is how I detected whether or not it ran.

I had sonnet write the output data (S parameters, impedences, etc.) to files.

I read the files into Matlab. I used my own algorithm to decide how well the antenna worked. (you will have to define your own, for your filter - Return Loss, Instertion Loss, etc. - my criteria were resonant frequency, input impedence, and bandwidth).

Depending on the performance I modified the values in my variable array and started the process over again.

Much of this information is also in the pdf included with the program.

Feel free to post questions here, I'll try to respond promptly.

[eudokia papahristoudi]

nothing

[tsegi bat]

i want to know how will do simulation step tracking antenna

[li li]

can the code used when the version of sonnet is above 10?thanks

[Serhend Arvas]

Thank you all for your comments.

To answer LILI's question:
The program should work for the new versions of Sonnet. I does not however work with Vista. Sadly, Microsoft has made reading from the registry VERY difficult in Vista. So now the program cannot search and find your most recent Sonnet installation automatically. You can however "hack" the code with your own installation location. If anyone wants to do this I can help.

I'm sorry, but I do not understand your question Mr. Bat. Please clarify.

[Sadik]

 

[Serhend Arvas]

NOTE 1: The method used to modify the geometries in this files are NO LONGER NEEDED. With the free toolbox SonnetLab, the interface between Sonnet and Matlab is taken care of. I STRONGLY urge users to use SonnetLab instead of my old brutish approach.

NOTE 2: If you still want to try this program it SHOULD work with Vista and Windows 7. I learned more about the registry and fixed the code.

[Sadik]

 

[zakour sam]

best code source

[Iron Fist]