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1. (WO2018099617) RESONATOR AND FILTER COMPRISING THE SAME

Pub. No.:    WO/2018/099617    International Application No.:    PCT/EP2017/071386
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Fri Aug 25 01:59:59 CEST 2017
IPC: H01P 7/04
Applicants: NOKIA TECHNOLOGIES OY
Inventors: KARHU, Kimmo Kalervo
DOUMANIS, Efstratios
Title: RESONATOR AND FILTER COMPRISING THE SAME
Abstract:
A resonator (40) for a filter comprises (i) a cavity (49) having first and second opposing conductive end walls (41, 42) and a conductive side wall (43); (ii) a conductive post (44) extending into the cavity from the first conductive end wall, the end of the conductive post remote from the first conductive end wall being provided or integral with a hollow conductive element (45) which is flared and increases in cross-section in a direction towards the second conductive end wall; and (iii) a load element (47) extending into the cavity from the second conductive end wall, the load element being flared and decreasing in cross-section in a direction away from the second conductive end wall. The end of the load element remote from the second conductive end wall extends into the end of the hollow conductive element remote from the conductive post and forms an annular gap with the hollow conductive element. The resonator has improved power-handling compared to resonators of the prior art.