In this paper, a novel design of a diplexer for mobile communication base station is proposed, theoretically investigated and successfully tested. The proposed design of the diplexer is implemented on the base of interdigital filters. Successfully fabricated and tested diplexer operates within frequency bands 2.3–2.4/2.49–2.69 GHz and shows high performances: reflection loss within pass bands is less −20 dB, insertion loss is −0.15 dB, isolation is −30 dB and intermodulation is −124 dBm.

Computer-aided design of the diplexer is carried out on the basis of combined technique, which includes filter synthesis using coupling matrices, eigenvalue problem solution for single resonator, interresonator coupling calculation and final full wave simulation and optimization of diplexer. The suggested design is a promising candidate for the implementation of diplexers with narrow, moderate and wide bandwidths for standard mobile communication frequency bands.

在本文中，提出了一种用于移动通信基站的双工器的新颖设计、理论研究和成功测试。双工器的建议设计是在叉指滤波器的基础上实现的。成功制造和测试的双工器在 2.3–2.4/2.49–2.69 GHz 频段内运行并显示出高性能：通带内的反射损耗小于 -20 dB，插入损耗为 -0.15 dB，隔离度为 -30 dB，互调为 -124分贝米。

双工器的计算机辅助设计是在组合技术的基础上进行的，包括使用耦合矩阵的滤波器合成、单谐振器的特征值问题求解、谐振器间耦合计算和双工器的最终全波仿真和优化。建议的设计是实现标准移动通信频带的窄、中和宽带宽的双工器的有希望的候选者。