Quasi-Elliptic-Type Multiplexer Design Without Cross Coupling
Quasi-Elliptic-Type Multiplexer Design Without Cross Coupling
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DOI：
10.1109/lmwc.2018.2856403
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发表时间：
2018-08
影响因子：
3
通讯作者：
R. Gómez‐García;J. Muñoz-Ferreras;D. Psychogiou
中科院分区：
文献类型：
--
作者：
R. Gómez‐García;J. Muñoz-Ferreras;D. Psychogiou
本文提出了一种设计无交叉耦合准椭圆型多工器的方法。它是基于使用一个多传输零点（TZ）/多极滤波单元的多路复用器通道的交界处。该滤波单元将多路复用器通道的阶数相对于隔离滤波器增加一阶，而其TZs由所有通道共享。以此方式，可合成增强阶锐抑制多路复用器。拟议的准椭圆型多路复用器的方法，这是一般的对称和非对称的任意阶设计在任何RF技术的操作基础，描述下的耦合矩阵为基础的形式主义。此外，为了实际验证的目的，三阶微带微带线的原型与中心在2.15和2.65 GHz的通道制造和测试。
A method to design quasi-elliptic-type multiplexers without cross coupling in its channelizing bandpass filters is reported. It is based on the use of a multi-transmission-zero (TZ)/multipole filtering cell in the junction of the multiplexer channels. This filtering cell increases the orders of the multiplexer channels by one in relation to the isolated filters, whereas its TZs are shared by all channels. In this manner, an enhanced order sharp-rejection multiplexer can be synthesized. The operational foundations of the proposed quasi-elliptic-type multiplexer approach, which is general for symmetrical and asymmetrical arbitrary-order designs in any RF technology, are described under a coupling-matrix-based formalism. Moreover, for practical-validation purposes, a third-order microstrip duplexer prototype with channels centered at 2.15 and 2.65 GHz is manufactured and tested.