Antenna Design for Mobile Devices, 2nd Edition

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 (VNA).

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

1. To design a matching network for a whip–stubby antenna which has two positions: extended and retracted
2. 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 a freeware, so you can use and distribute it as you wish. But I am not responsible for any consequences of ...