ClassID:

213984

H01P1/208 - CPC Classification

Classification description:

Auxiliary devices; Frequency-selective devices, e.g. filters; Hollow waveguide filters Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Sub-classes:
Recent Application in this class:
#1
20260121270
2026-04-30

WAVEGUIDE FILTER WITH ELECTRONICALLY CONTROLLABLE VARIABLE DIELECTRIC MATERIAL

#2
20250385414
2025-12-18

RESONATOR AND FILTER

#3
20250379348
2025-12-11

FILTER

#4
20250316875
2025-10-09

COAXIAL RF DUAL-POLARIZED WAVEGUIDE FILTER AND METHOD

#5
20250293418
2025-09-18

RESONANT ELEMENT, AND RESONANT UNIT AND FILTER COMPRISING THE SAME

#6
20250253516
2025-08-07

APPARATUS AND METHOD FOR COUPLING ELECTROMAGNETIC ENERGY INTO A CAVITY OF A RESONATOR WHICH INCLUDES ONE OR MORE LOOP-GAP RESONATORS

#7
20250132480
2025-04-24

COMMUNICATION DEVICE

#8
20250105483
2025-03-27

DUPLEX CERAMIC FILTER

#9
20240178538
2024-05-30

HYBRID TYPE FILTER SOLUTION

#10
20240145894
2024-05-02

Coaxial RF dual-polarized waveguide filter and method

#11
20240120631
2024-04-11

CAVITY FILTER

#12
20240047842
2024-02-08

SWITCHABLE FILTER

#13
20230420822
2023-12-28

Radio frequency resonator structure

#14
20230361442
2023-11-09

FILTER UNIT, ANTENNA FILTER UNIT AND RADIO UNIT

#15
20230223702
2023-07-13

CAVITY FILTER FOR ANTENNA

#16
20230223670
2023-07-13

RF FILTER ASSEMBLY FOR ANTENNA

#17
20230155267
2023-05-18

Metallized dielectric waveguide filters having irregular shaped resonant cavities, slanted metallized openings and/or spurious coupling windows

#18
20230111963
2023-04-13

Cavity filters and filter modules therefor

#19
20230109939
2023-04-13

MICROWAVE OR MILLIMETER WAVE PASSIVE COMPONENTS OR DEVICES

#20
20230006323
2023-01-05

Radio frequency filters having a circuit board with multiple resonator heads, and resonator heads having multiple arms

#21
20220393325
2022-12-08

CAVITY FILTER AND MANUFACTURING METHOD THEREFOR

#22
20220328947
2022-10-13

Cavity filter element for a cavity filter

#23
20220255207
2022-08-11

Resonant cavity filters including coupling tuning by resonator rotation

#24
20220223989
2022-07-14

Dielectric filter and communication device

#25
20220181759
2022-06-09

Cross-coupled filter

#26
20220131249
2022-04-28

FILTER

#27
20220069427
2022-03-03

Cross-coupled filter

#28
20220045662
2022-02-10

Single mode cavity filter

#29
20220029261
2022-01-27

Band-stop filter, transmission line for band-stop filter and multiplexer

#30
20210384604
2021-12-09

Cavity-based dual-band filtering balun

#31
20210344093
2021-11-04

Filter

#32
20210159581
2021-05-27

Tuning elements with reduced metal debris formation for resonant cavity filters

#33
20210083354
2021-03-18

Coupling structure of filter and processing method

#34
20210066773
2021-03-04

Bandpass filter

#35
20210028526
2021-01-28

Waveguide filter

#36
20200411936
2020-12-31

Tubular in-line filters that are suitable for cellular applications and related methods

#37
20200373644
2020-11-26

Waveguide band-pass filter

#38
20200350651
2020-11-05

Radio frequency filter

#39
20200295424
2020-09-17

Coaxial RF dual-polarized waveguide filter and method

#40
20200295423
2020-09-17

Band-stop filter, transmission line for band-stop filter and multiplexer

#41
20200083589
2020-03-12

Coaxial Resonator and Method of Operating a Coaxial Resonator

#42
20190288360
2019-09-19

Multi-filtenna system

#43
20190181524
2019-06-13

Radio frequency filter

#44
20190173153
2019-06-06

Resonant filter using mm wave cavity

#45
20190165441
2019-05-30

Method and a system for evaluating a filter body and a method for manufacturing a cavity filter

#46
20190140334
2019-05-09

Tubular in-line filters that are suitable for cellular applications and related methods

#47
20190027798
2019-01-24

RF filter tuning system and method for manufacturing filter using the same

#48
20180366802
2018-12-20

Cavity filter for low PIMD using hybrid cap bolt

#49
20180358674
2018-12-13

Resonant cavity filters with high performance tuning screws

#50
20180344400
2018-12-06

Electrosurgical apparatus

#51
20180342779
2018-11-29

Re-filters for PIM measurements and a test bench utilizing the same

#52
20180301781
2018-10-18

Filter and wireless network device

#53
20180277920
2018-09-27

Cavity filter

#54
20180269554
2018-09-20

COAXIAL RF DUAL-POLARIZED WAVEGUIDE FILTER AND METHOD

#55
20180269553
2018-09-20

RF cavity filter using elastic element and method for manufacturing the same

#56
20180248242
2018-08-30

METALIZED MOLDED PLASTIC COMPONENTS FOR MILLIMETER WAVE ELECTRONICS AND METHOD FOR MANUFACTURE

#57
20180233795
2018-08-16

Millimeter wave filter fine-tuning structure

#58
20180226707
2018-08-09

Cavity filter

#59
20180205127
2018-07-19

Channel filter with adjustable frequency

#60
20180205126
2018-07-19

Drill tuning of aperture coupling

#61
20180198185
2018-07-12

NONUNIFORM CORRUGATED DIAPHRAGM FOR MEMS TUNERS AND ACTUATORS

#62
20180191046
2018-07-05

Dielectric loaded metallic resonator

#63
20180175475
2018-06-21

Cavity resonator device with a coupling element

#64
20180138571
2018-05-17

Tunable low-pass filter using dual mode

#65
20180102579
2018-04-12

Indirect transmission type automatic frequency modulation filter

#66
20180076497
2018-03-15

Waveguide filter formed by a casing and a cap fitted into the casing, where a tuning sheet is interposed between the cap and the casing

#67
20180048045
2018-02-15

Signal transmission system, connector apparatus, electronic device, and signal transmission method

#68
20170288289
2017-10-05

Tunable filter

#69
20170271744
2017-09-21

LIGHTWEIGHT CAVITY FILTER STRUCTURE

#70
20170237143
2017-08-17

Cavity resonator with thermal compensation

#71
20170229757
2017-08-10

Plating methods for modular and/or ganged waveguides for automatic test equipment for semiconductor testing

#72
20170179559
2017-06-22

Multi resonator non-adjacent coupling

#73
20170170536
2017-06-15

Method for compensating a temperature drift of a microwave filter

#74
20170170535
2017-06-15

Microwave filter having a fine temperature drift tuning mechanism

#75
20170098878
2017-04-06

RF filter tuning system and method for manufacturing filter using the same

#76
20170098877
2017-04-06

OPEN CIRCUT COMMON JUNCTION FEED FOR DUPLEXER

#77
20170071080
2017-03-09

Tunable filter

#78
20170069942
2017-03-09

Filter capable of adjusting frequency and bandwidth

#79
20170040978
2017-02-09

Reconfigurable microwave filters

#80
20170033424
2017-02-02

DUAL-MODE MICROWAVE TUNABLE FILTER

#81
20170025735
2017-01-26

Microwave cavity resonator

#82
20160351989
2016-12-01

Resonator assembly and filter

#83
20160351985
2016-12-01

LUMPED ELEMENT RECTANGULAR WAVEGUIDE FILTER

#84
20160336922
2016-11-17

Nonuniform corrugated diaphragm for MEMS tuners and actuators

#85
20160336632
2016-11-17

Dielectric waveguide filter with direct coupling and alternative cross-coupling

#86
20160301122
2016-10-13

Cavity filter using cross-coupling

#87
20160233567
2016-08-11

Cavity filter and RF communication device with the cavity filter

#88
20160226125
2016-08-04

RF notch filters and related methods

#89
20160218406
2016-07-28

COAXIAL RF DUAL-POLARIZED WAVEGUIDE FILTER AND METHOD

#90
20160211565
2016-07-21

Methods and devices for integrating radio frequency and other signals within a conductor

#91
20160204493
2016-07-14

Radio frequency filter with cavity structure

#92
20160190669
2016-06-30

Intermodulation distortion reduction system using insulated tuning elements

#93
20160156325
2016-06-02

System and method for electronically adjustable antenna

#94
20160118702
2016-04-28

Filter, communications apparatus, and communications system

#95
20160081211
2016-03-17

Shell of electronic device and wave filter

#96
20160064790
2016-03-03

Generic channel filter

#97
20160006098
2016-01-07

Waveguide-type image rejection filter and single-sideband receiver, frequency divider, and sideband-separating receiver using the same filter

#98
20150333386
2015-11-19

Cavity filter

#99
20150288045
2015-10-08

Millimeter waveband filter

#100
20150280300
2015-10-01

Multi-band filter

#101
20150280299
2015-10-01

WAVEGUIDE BAND PASS FILTER USING SHORT-CIRCUIT STUB FOR REJECTION PERFORMANCE IMPROVEMENT

#102
20150280297
2015-10-01

Adjustable phase-inverting coupling loop

#103
20150263399
2015-09-17

Millimeter waveband filter

#104
20150244050
2015-08-27

RF filter for adjusting coupling amount or transmission zero

#105
20150244049
2015-08-27

Dielectric waveguide filter with direct coupling and alternative cross-coupling

#106
20150238257
2015-08-27

Electrosurgical apparatus

#107
20150091672
2015-04-02

Multi resonator non-adjacent coupling

#108
20150061792
2015-03-05

Variable bandwidth RF filter

#109
20150042419
2015-02-12

Multi-band pass filter

#110
20150042413
2015-02-12

Tunable filter and duplexer including filter

#111
20140340169
2014-11-20

Reduced size cavity filter for PICO base stations

#112
20140327499
2014-11-06

Radio frequency filter having a hollow box with a wrinkle structure and including a resonance element disposed therein which is short-circuited to the box by a pin

#113
20140266961
2014-09-18

Mode filter

#114
20140266514
2014-09-18

Dielectric waveguide filter with direct coupling and alternative cross-coupling

#115
20140111289
2014-04-24

Microwave filter having an adjustable bandwidth

#116
20140070904
2014-03-13

Metalized molded plastic components for millimeter wave electronics and method for manufacture

#117
20130335165
2013-12-19

Waveguide busbar

#118
20130278610
2013-10-24

TOPPED-POST DESIGNS FOR EVANESCENT-MODE ELECTROMAGNETIC-WAVE CAVITY RESONATORS

#119
20130278609
2013-10-24

Isotropically-etched cavities for evanescent-mode electromagnetic-wave cavity resonators

#120
20130234807
2013-09-12

Cavity filter with resilient member connected between slider and driving device

#121
20130222080
2013-08-29

Non-resonant node filter

#122
20130181790
2013-07-18

Cavity filter with tuning structure

#123
20130169384
2013-07-04

Frequency-tunable microwave bandpass filter

#124
20130154772
2013-06-20

Waveguide band-pass filter with pseudo-elliptic response

#125
20130021117
2013-01-24

Locking device for a radio frequency filter tuning probe

#126
20130016025
2013-01-17

Lightweight cavity filter and radio subsystem structures

#127
20120313732
2012-12-13

Cavity filter with high flatness feedback

#128
20120299667
2012-11-29

Cavity filter having feedback arrangement

#129
20120293279
2012-11-22

Integrated cavity filter/antenna system

#130
20120293275
2012-11-22

Electrical filter

#131
20120286901
2012-11-15

Dielectric waveguide filter with direct coupling and alternative cross-coupling

#132
20120249266
2012-10-04

RF FILTER FOR ADJUSTING COUPLING AMOUNT OR TRANSMISSION ZERO

#133
20120242425
2012-09-27

Lightweight cavity filter structure

#134
20120188029
2012-07-26

Filter

#135
20120049984
2012-03-01

Filter

#136
20110298566
2011-12-08

TE011 cavity filter assembly

#137
20110254641
2011-10-20

Multi-band filter including a plurality of parallel filters each configured to provide a particular effective path length

#138
20110241801
2011-10-06

Reduced size cavity filters for pico base stations

#139
20110030197
2011-02-10

Method of constructing a tunable RF filter

#140
20100308925
2010-12-09

Method of producing micromachined air-cavity resonator, micromachined air-cavity resonator, band-pass filter and oscillator using the method

#141
20100156568
2010-06-24

Microwave filter based on a novel combination of single-mode and dual-mode cavities

#142
20090291591
2009-11-26

Wave filter structure

#143
20090289746
2009-11-26

Trimming of waveguide filters

#144
20090284325
2009-11-19

Phased-array antenna filter and diplexer for a super economical broadcast system

#145
20090231064
2009-09-17

Wideband dielectric waveguide filter

#146
20090201106
2009-08-13

Harmonic suppression resonator, harmonic propagation blocking filter, and radar apparatus

#147
20090195331
2009-08-06

Filter

#148
20090146763
2009-06-11

High Q surface mount technology cavity filter

#149
20090121937
2009-05-14

Band pass filter with tunable phase cancellation circuit

#150
20090015352
2009-01-15

FILTER ASSEMBLIES AND COMMUNICATION SYSTEMS BASED THEREON

#151
20080150129
2008-06-26

Transceiver device

#152
20070290768
2007-12-20

Ridge-waveguide filter and filter bank

#153
20070287634
2007-12-13

Waveguide-based MEMS tunable filters and phase shifters

#154
20070262835
2007-11-15

Polarization-preserving waveguide filter and transformer

#155
20070257749
2007-11-08

Coupling a signal through a window

#156
20070022153
2007-01-25

Liquid cooled high-frequency filter

#157
20060232364
2006-10-19

Coupled resonator filters formed by micromachining

#158
20060186969
2006-08-24

Low-loss filter and frequency multiplexer

#159
20060185161
2006-08-24

Method of fabrication of low-loss filter and frequency multiplexer

#160
20060066421
2006-03-30

Bandpass filter with pseudo-elliptic response

#161
20050264379
2005-12-01

U-shaped microwave and millimeter wave resonator filter

#162
20050225411
2005-10-13

Filter structure including circuit board

#163
20050212622
2005-09-29

Bandpass filter having parallel signal paths

#164
20050176387
2005-08-11

Microwave filter assembly

#165
20050073464
2005-04-07

Microwave components

#166
18413834
2024-12-10

Method for servicing a duplexer having a radio frequency assembly

#167
18370471
2026-03-17

Cross-coupled dual-stub waveguide filter

#168
18228315
2024-02-27

Duplexer radio frequency assembly

#169
15969316
2019-09-03

Superconductive cavity oscillator

#170
13553952
2015-09-01

Tunable bandpass filter integrated circuit