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1. (WO2018157845) ELLIPTIC DIRECTIONAL FILTERS FOR A COMBINER CIRCUIT

Pub. No.:    WO/2018/157845    International Application No.:    PCT/CN2018/077803
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Sat Mar 03 00:59:59 CET 2018
IPC: H04L 5/10
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: YI, Huairen
MA, Zhengxiang
Title: ELLIPTIC DIRECTIONAL FILTERS FOR A COMBINER CIRCUIT
Abstract:
An elliptic combiner circuit filters a first and second signal in a first and second frequency band. A first resonator is coupled to a first input via a first capacitor and a second input via a second capacitor. A second resonator is coupled to a first and second signal path, coupled to the first and second input, via a third and a fourth capacitor. A first inductor is coupled between the first and third capacitors, and between the second and fourth capacitors. A third resonator is coupled to the first and second signal paths via a fifth, sixth, and seventh capacitors. A fourth resonator is coupled to the first signal path and a terminated port via an eighth, ninth and tenth capacitors. A second inductor is coupled between the fifth and eighth capacitors, and between the seventh and tenth capacitors. An output outputs the first and second signals.