US 12,609,435 B2Granted

Filter manufacturing method and filter manufactured by the method

AssigneeKorea Aerospace Research Institute

InventorsBo Young Lee, Ok Chul Jung, Myeong Shin Lee

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Abstract

A filter manufacturing method and a filter manufactured by the filter manufacturing method are disclosed. The filter manufacturing method includes designating a use mode in a resonator to a first resonance mode, in response to designating to the first resonance mode, setting a band selected from a designated first frequency band to a passband in the resonator, switching the use mode in the resonator from the first resonance mode to a second resonator mode, in response to switching to the second resonance mode, setting a band selected from the first frequency band except for the passband to a stopband in the resonator, and manufacturing a primary filter including the resonator to which the passband and the stopband are set.

Claims10

Dependent claims

A filter manufacturing method comprising:

designating a use mode in a resonator to a first resonance mode;
in response to designating to the first resonance mode, setting a band selected from a designated first frequency band to a passband in the resonator;
switching the use mode in the resonator from the first resonance mode to a second resonance mode;
in response to switching to the second resonance mode, setting a band selected from the first frequency band except for the passband to a stopband in the resonator;
and
manufacturing a primary filter comprising the resonator to which the passband and the stopband are set,
wherein a plurality of screws configured to mount the resonator on an inner surface of a housing is tunable by a stepper motor,
the filter manufacturing method further comprising:
increasing or decreasing a bandwidth of a band that is set to the passband by tuning a first screw and a third screw of the plurality of screws;
or
increasing or decreasing a bandwidth of a band that is set to the stopband by tuning a second screw and a fourth screw of the plurality of screws.

8 more elements

A filter manufactured by a filter manufacturing method, the filter being manufactured as a primary filter comprising a single cylindrical resonator in which a passband and a stopband are set by switching a use mode, wherein the single cylindrical resonator is mounted on an inner surface of a housing by a plurality of screws,

wherein, when the use mode in the resonator is designated to a first resonance mode, a band from a designated first frequency band is set to the passband, and
when the use mode in the resonator is switched from the first resonance mode to a second resonance mode, a band selected from the first frequency band except for the passband is set to the stopband,
wherein a plurality of screws configured to mount the resonator on an inner surface of a housing is tunable by a stepper motor,
and the stepper motor is configured to increase or decrease a bandwidth of a band that is set to the passband by tuning a first screw and a third screw of the plurality of screws;
or
increase or decrease a bandwidth of a band that is set to the stopband by tuning a second screw and a fourth screw of the plurality of screws.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/977,308Filed 31 Oct 2022
Priority: KR 10-2021-01481211 Nov 2021
Published: US 2023/0138279 A14 May 2023
Granted: 21 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01P 1/205
Filters for transverse electromagnetic waves: comb or interdigital filters; Cascaded coaxial cavities
H01P 11/007
Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type: manufacturing…
G06F 30/373
Circuit design at the analogue level: design optimisation
H01P 1/20
Auxiliary devices: frequency-selective devices, e.g. filters