公开(公告)号：EP3979404A1

公开(公告)日：2022-04-06

申请号：EP21197234.4

申请日：2021-09-16

Applicant: COM DEV LTD.

Inventor： GOULOUEV, Rousslan ,  MCLAREN, Colin

IPC: H01P1/202

Abstract: Various embodiments for a coaxial low-pass filter are described herein. Generally, the coaxial low-pass filter is operable to generate a stopband by a controlled generation of transmission zeroes within a stopband frequency range. The coaxial filter includes a plurality of cavity junctions, each of the plurality of cavity junctions operable to generate at least one corresponding cavity-specific transmission zero through a dual-mode coupling of a transverse electromagnetic and a transverse magnetic resonant mode, the at least one cavity-specific transmission zero being generated at at least one corresponding frequency located within the stopband frequency range, wherein for each cavity junction, the location of the cavity-specific frequency is adjusted by adjusting at least one property of the cavity junction, wherein a scattering of the locations of each of the cavity-specific transmission zeroes, generated by each of the plurality of cavity junctions, generates the stopband at the desired frequency range.

公开(公告)号：EP3742545A1

公开(公告)日：2020-11-25

申请号：EP20175297.9

申请日：2020-05-18

Applicant: COM DEV Ltd.

Inventor： GOULOUEV, Rousslan ,  CHANG, Jianming

IPC: H01P1/208 ,  H01P1/211

Abstract: A bandpass filter has a plurality of resonant cavities. The plurality of resonant cavities are arranged into a sequence of adjacent resonant cavities. Each resonant cavity is configured to define the same fundamental resonant frequency. The filter includes a plurality of coupling irises, with one of the coupling irises positioned between each pair of adjacent resonant cavities. Each resonant cavity includes a plurality of cavity sections. Each resonant cavity includes a capacitive iris positioned coupling the cavity sections to one another. The frequency of secondary resonance modes varies amongst the resonant cavities in the plurality of resonant cavities.