A Design of Complementary Microwave Duplexers

• Main Authors: ChengWen Wang, 王承文
• Other Authors: J.J. Chang
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/77390726250285513322

碩士 === 國立海洋大學 === 電機工程學系 === 89 === In the design of microwave duplexers, the center frequency, the insertion and return losses and fractional bandwidth of each channel are important parameters to be considered. In this thesis, the structures of the parallel-coupled bandpass and bandstop filters are applied to design the traditional complementary duplexer firstly, and then we reform the filters structures to design the retrofit complementary duplexer in order to achieve the better performances. In this thesis, the theories of the design of filters and duplexers are analyzed firstly. Next, traditional and retrofit complementary duplexers are designed and realized, respectively. Finally, the characteristics of the duplexers are measured and compared with the simulation results.