Novel Approach to the Synthesis of Microwave Diplexers
Novel Approach to the Synthesis of Microwave Diplexers
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DOI：
10.1109/tmtt.2006.885909
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发表时间：
2006-12
影响因子：
4.3
通讯作者：
G. Macchiarella;S. Tamiazzo
中科院分区：
文献类型：
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作者：
G. Macchiarella;S. Tamiazzo
介绍了一种微波双工器的合成方法。它基于双工器的特征多项式的评估，包括连接TX和RX滤波器的三端口接头（考虑两种类型的接头，适用于波导和同轴双工器建模）。该新方法特别适用于两个双工器通道之间的小间隔：众所周知，由于TX和RX滤波器之间的强相互作用，这是双工器设计中最困难的情况。所提出的合成方法提供了显着的设计灵活性，因为它允许合成的两个组成滤波器独立的连接到双工器，同时考虑到在双工器结中产生的相互作用。此外，滤波器拓扑的选择是绝对任意的（必须指定两个滤波器的极点和传输零点的数量）。所提出的方法已通过全球移动的通信基站双工器的设计和制作得到验证
A procedure for synthesizing microwave diplexers is presented. It is based on the evaluation of the characteristic polynomials of the diplexer including the three-port junction connecting the TX and RX filters (two types of junctions are considered, suitable for waveguide and coaxial diplexers modeling). The novel method is particularly suited for small separation between the two diplexer channels: as known, this is the most difficult case in the diplexers design, due to the strong interaction between the TX and RX filters. The proposed synthesis approach offers noticeable design flexibility, as it allows the synthesis of the two composing filters independently of their connections to the diplexer, taking into account at the same time the interaction produced in the diplexer junction. Moreover the choice of the filters topology is absolutely arbitrary (the number of poles and the transmission zeros of the two filters have to be specified). The proposed method has been validated by the design and fabrication of a diplexer for global system for mobile communications base stations