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Antenna Design For Mobile Devices by Zhijun Zhang

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Appendix: User Manual for ZJ_Antenna_Matching Software

ZJ_Matching is an antenna matching network optimization tool. It is an installation-free software. Just download and unzip the file and run the ZJ_Antenna_Matching.exe. There is another strip-down version, ZJ_Matching_Mini, which fits into a 640 × 480 pixels monitor and can be used on a Windows® based Vector Network Analyzer.

The software can be used to design a matching network for an antenna which can have up to two different scenarios, for example:

  • To design a matching network for a whip-stubby antenna which has two positions: extended and retracted.
  • To design an antenna matching network that gives a balanced performance between the free space and the talking position.

To design a matching network for a cell phone antenna, many commercial software packages, such as Agilent ADS®, Microwave Office®, and so on, can be used. When I was working for the industry as an antenna engineer, I did feel, although those commercial codes were very powerful, they were not very efficient and were a kind of overkill when used in an antenna matching network designing, which normally uses less than four components. Thus I decided to write this software in my spare time. The first version was written in 2003 and I have been modifying it since then. After I made my career U-turn in 2007, the software can now be released to public.

This is freeware, so you can use and distribute it as you wish. But I am not responsible for any consequences ...

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