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1. (WO2018039993) TM DUAL MODE FILTER

Pub. No.:    WO/2018/039993    International Application No.:    PCT/CN2016/097586
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Sep 01 01:59:59 CEST 2016
IPC: H01P 1/20
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
ZHANG, Xiaoliang
Inventors: ZHANG, Xiaoliang
Title: TM DUAL MODE FILTER
Abstract:
The present disclosure provides a filter comprises an enclosure having two cavities separated by a wall; a first TM dual-mode resonator and a second TM dual-mode resonator, each TM dual-mode resonator having two modes and comprising a body having a central portion with a plurality of arms extending outwardly from the central portion; a gradient aperture formed in the wall for coupling between two TM dual-mode resonators. The filter is capable of forming two transmission zeros between four resonances modes.