The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2021
Filed:
Aug. 24, 2017
Nokia Technologies Oy, Espoo, FI;
Kimmo Kalervo Karhu, Oulu, FI;
Efstratios Doumanis, Dublin, IE;
Nokia Technologies OY, Espoo, FI;
Abstract
A resonator () for a filter comprises (i) a cavity () having first and second opposing conductive end walls () and a conductive side wall (); (ii) a conductive post () 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 () which is flared and increases in cross-section in a direction towards the second conductive end wall; and (iii) a load element () 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.