公开(公告)号：US10211500B2

公开(公告)日：2019-02-19

申请号：US15442028

申请日：2017-02-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changsoo Kwak

IPC: H01P1/207 ,  H01P7/06 ,  H01P1/208

Abstract: Disclosed is a tunable low-pass filter using a dual mode including a cylindrical cavity configured to trigger a resonant mode, a plurality of irises formed on a lateral face of the cylindrical cavity, and a dummy iris formed on the lateral face of the cylindrical cavity, wherein the resonant mode includes a plurality of modes having a plurality of resonant frequencies, and differences in resonance frequency between the plurality of modes are determined based on angles between the plurality of irises based on an axis of the cylindrical cavity.

公开(公告)号：US11742560B2

公开(公告)日：2023-08-29

申请号：US17126371

申请日：2020-12-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Changsoo Kwak

IPC: H01P5/19

CPC classification number: H01P5/19

Abstract: A T-junction with high isolation and a method for fabricating the same are provided. The T-junction includes a power divider/combiner configured to divide or combine power, a dielectric substrate disposed perpendicular to a lower plane of the power divider/combiner, and a dielectric holder configured to dispose the dielectric substrate.

公开(公告)号：US09905903B2

公开(公告)日：2018-02-27

申请号：US14990287

申请日：2016-01-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changsoo Kwak ,  Man Seok Uhm

IPC: H01P7/10 ,  H01P1/208 ,  H01P7/04

CPC classification number: H01P7/10 ,  H01P1/2084 ,  H01P7/04

Abstract: A resonator filter according to a first exemplary embodiment of the present invention includes: a cover formed with a first coupling hole; a housing connected to the cover to form an inner space and having a second coupling hole formed at a bottom of the inner space; a dielectric material mounted around the second coupling hole in the bottom of the inner space of the housing; a first rod inserted to the first coupling hole to be connected to the cover and pressing the dielectric material; and a second rod inserted to the second coupling hole to be connected to the housing to be close to the dielectric material and tuning a resonance frequency by controlling a separation distance from the first rod.

公开(公告)号：US10727556B2

公开(公告)日：2020-07-28

申请号：US16165433

申请日：2018-10-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changsoo Kwak ,  In Bok Yom ,  So-hyeun Yun ,  Hongyeol Lee

IPC: H01P1/208 ,  H01P7/06

Abstract: Disclosed is a multimode microwave filter including a resonator in which a cavity is formed to generate a resonant mode and a plurality of irises formed on a side surface of the resonator, in which the cavity of the resonator has a rhombus-shaped cross section.