EGSM 900MHz移动通信基站天线模块中互调失真的测量与控制

Intermodulation Distortions Measuring and Controlling of Antenna Module within the EGSM 900MHz Mobile Communication Base Station

从理论和实践两方面阐述了EGSM 900MHz移动基站中天线模块产生的三阶和五阶互调失真对移动通讯质量的影响;详细叙述了在没有专用互调失真测试仪器的情况下,如何用通用的测量仪器、功率放大器和低互调失真的电缆构建高质量的测试系统,以满足移动通讯基站中天线模块互调失真的测量要求;最后,给出了设计和制造天线模块过程中控制互调失真的某些经验。

The third and fifth order intermodulation distortions of an antenna module within the EGSM 900MHz mobile communication base station and its impact on communication quality are analyzed from both the theory and practice. A measurement system of intermodulation distortions of an antenna module has been developed using general measurement instruments, power amplifiers and cable with lower intermodulation distortions level. It is proved that this measurement system operates very well and measuring results from our developing samples of antenna modules shov~ that they can meet the requirements of international standards of EGSM base station. Some experiences with controlling third and fifth order intermodulation distortions within antenna modules are given in the end.