双模双待手机互扰的实验验证及解决方案

The experiment and solution on the interference of the dual mode and dual stay telephone

对TDSCDMA—GSM双模双待移动终端的2010～2025MHz频段与1800MHz频段之间的干扰问题进行研究。通过搭建手机天线能够全方位辐射的暗室测试环境以及进行有序的对比实验，获得测试数据验证了两频段之间同频干扰的存在。在没有改动原有PCB板布局和走线的情况下，通过将TD-SCDMA发射通路上功率放大器后端匹配网络改为高通滤波网络而使得系统灵敏度取得7dB的改善。

The interference between 2 010 - 2 025 MHz TD-SCDMA system and 1800MHz GSM system in some dual mode and dual standby mobile terminal is mainly studied in this paper. A dark-room test environment and detailed test steps are given. The experiment varifies the exist- ence of the same frequency interference. This paper also provides the effective way to increase the sensitivity about 7 dB by converting a matching network into a high pass filter at the end of power amplifier of the transmitting access of TD-SCDMA system.