公开(公告)号：FI3621145T3

公开(公告)日：2024-10-03

申请号：FI18794866

申请日：2018-05-02

Applicant: KMW INC

Inventor： KIM JOUNG-HOE ,  JANG SUNG-HO

IPC: H01P1/202 ,  F16B39/26 ,  F16B43/00 ,  H01P1/205 ,  H01P7/04

Abstract: A cavity-type radio frequency filter is disclosed. the radio frequency filter having a cavity structure including an enclosure, a resonant element, a cover, a frequency tuning screw, and a resilient fixing member. The enclosure has a hollow inside and an open surface on one side to have a cavity. The resonant element is positioned in the hollow of the enclosure. The cover has a screw hole having a preset diameter at a position corresponding to the resonant element, and is configured to seal the open surface of the enclosure. The frequency tuning screw is configured to be screwed into the screw hole of the cover, and it has an upper end formed at least partially with a latching abutment that protrudes outwardly.

公开(公告)号：EP3214693A4

公开(公告)日：2018-06-27

申请号：EP15855287

申请日：2015-10-08

Applicant: KMW INC

Inventor： PARK NAM-SHIN ,  KIM JOUNG-HOE

IPC: H01P1/205 ,  H01P1/30

CPC classification number: H01P1/2053 ,  H01P1/20 ,  H01P1/202 ,  H01P1/208 ,  H01P1/30 ,  H01P7/04

Abstract: The present invention relates to a wireless frequency filter having a cavity structure, the wireless frequency filter comprising: a housing having a hollow interior and an open surface on one side so as to structure a cavity; a cover for sealing the open surface of the housing; and resonance members located in the hollow space of the housing, wherein the cover is provided with through-holes in the vicinity corresponding to each resonance member, and tuning structures for frequency tuning fitted in a shape to block the through-holes, the tuning structure being made of material having coefficient of thermal expansion which is lower or higher than that of the material of the cover.