摘要
针对多模数据卡终端WCDMA2100频段射频发射通路易出现二次谐波泄漏,引起通信质量下降的问题,通过在功率放大器输出端搭建一个具有低通滤波功能的T型LC匹配网络来实现二次谐波的抑制。在ADS2008软件下仿真S参数并对匹配网络进行优化,使得二倍频处的谐波分量在-44dB以下,同时主频带内的信号未被削弱。经过仿真和实测分析表明,此设计方法对二次谐波有良好的抑制作用,可用于解决谐波泄漏问题。
The second harmonic leakage of WCDMA2100 band radio frequency transmitting pas- sageway in the multi-mode data card terminal usually lead to a drop in the quality of communica- tion. A low-pass filtering function of T-type and LC-matching network connected to the power amplifier output terminal is designed in this paper in order to restrain the second harmonic. Simu- lation of the S parameter and optimization of the matching network are carried out by the ADS2008 software so that the harmonic component of double frequency signal is under --44 dB while the signal in the middle frequency band is not weakened. Simulation results and real meas- urements show that this design is very useful for the problem of second harmonic leakage. restraining double frequency signal and can solve
出处
《西安邮电大学学报》
2014年第1期66-69,共4页
Journal of Xi’an University of Posts and Telecommunications
基金
西安市科技局工业技术应用研发基金资助项目(CXY1117)
关键词
多模数据卡
T型LC匹配网络
二次谐波
multi-mode data card, T-type and LC-matching network, the second harmonic
