HK88490A - Radio frequency filters - Google Patents
Radio frequency filtersInfo
- Publication number
- HK88490A HK88490A HK88490A HK88490A HK88490A HK 88490 A HK88490 A HK 88490A HK 88490 A HK88490 A HK 88490A HK 88490 A HK88490 A HK 88490A HK 88490 A HK88490 A HK 88490A
- Authority
- HK
- Hong Kong
- Prior art keywords
- radio frequency
- frequency filters
- filters
- radio
- frequency
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Transceivers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65612184A | 1984-09-27 | 1984-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK88490A true HK88490A (en) | 1990-11-02 |
Family
ID=24631722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK88490A HK88490A (en) | 1984-09-27 | 1990-10-25 | Radio frequency filters |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH0697721B2 (en) |
GB (1) | GB2165098B (en) |
HK (1) | HK88490A (en) |
SG (1) | SG73190G (en) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3751062T2 (en) * | 1986-07-25 | 1996-01-18 | Motorola Inc | FILTERS CONSISTING OF A BUILT-IN UNIT WITH SEVERAL RESONATORS. |
US4692726A (en) * | 1986-07-25 | 1987-09-08 | Motorola, Inc. | Multiple resonator dielectric filter |
JPS6335301U (en) * | 1986-08-26 | 1988-03-07 | ||
JPS6354803A (en) * | 1986-08-26 | 1988-03-09 | Oki Electric Ind Co Ltd | Dielectric filter |
JPS6340009U (en) * | 1986-09-02 | 1988-03-15 | ||
EP0287671B1 (en) * | 1986-10-06 | 1993-12-08 | Matsushita Electric Industrial Co., Ltd. | Antenna sharing device |
JPH0612841B2 (en) * | 1987-08-08 | 1994-02-16 | 沖電気工業株式会社 | Frequency adjustment method for dielectric filter |
JPH0652843B2 (en) * | 1987-08-31 | 1994-07-06 | 沖電気工業株式会社 | Duplexer |
JPH0191502A (en) * | 1987-10-01 | 1989-04-11 | Murata Mfg Co Ltd | Dielectric resonator |
US4785271A (en) * | 1987-11-24 | 1988-11-15 | Motorola, Inc. | Stripline filter with improved resonator structure |
JPH0628801Y2 (en) * | 1987-12-10 | 1994-08-03 | 株式会社村田製作所 | Dielectric filter |
JPH0722885Y2 (en) * | 1988-02-16 | 1995-05-24 | 株式会社村田製作所 | Stripline filter package structure |
JPH01227530A (en) * | 1988-03-07 | 1989-09-11 | Kokusai Electric Co Ltd | Branching filter |
US4879533A (en) * | 1988-04-01 | 1989-11-07 | Motorola, Inc. | Surface mount filter with integral transmission line connection |
US4823098A (en) * | 1988-06-14 | 1989-04-18 | Motorola, Inc. | Monolithic ceramic filter with bandstop function |
US5015974A (en) * | 1988-06-20 | 1991-05-14 | Oki Electric Industry Co., Ltd. | Isolating circuit and dielectric filter for use therein |
JPH0722887Y2 (en) * | 1988-09-05 | 1995-05-24 | ティーディーケイ株式会社 | Dielectric filter device |
JPH071843Y2 (en) * | 1988-10-11 | 1995-01-18 | 富士電気化学株式会社 | Dielectric filter |
JPH07105644B2 (en) * | 1988-10-18 | 1995-11-13 | 沖電気工業株式会社 | Polarized dielectric filter |
GB2236432B (en) * | 1989-09-30 | 1994-06-29 | Kyocera Corp | Dielectric filter |
US5023580A (en) * | 1989-12-22 | 1991-06-11 | Motorola, Inc. | Surface-mount filter |
US5045824A (en) * | 1990-09-04 | 1991-09-03 | Motorola, Inc. | Dielectric filter construction |
DE69125273T2 (en) * | 1990-12-26 | 1997-08-28 | Ube Industries | DIELECTRIC FILTER |
FI87852C (en) * | 1991-04-12 | 1993-02-25 | Lk Products Oy | Tunable ceramic filter and method for its tuning |
US5202654A (en) * | 1991-07-22 | 1993-04-13 | Motorola, Inc. | Multi-stage monolithic ceramic bandstop filter with isolated filter stages |
JPH0728723Y2 (en) * | 1992-03-26 | 1995-06-28 | 株式会社村田製作所 | Dielectric coaxial resonator |
JPH0621701A (en) * | 1992-06-30 | 1994-01-28 | Taiyo Yuden Co Ltd | Filter inclusing dielectric resonator |
US5278527A (en) * | 1992-07-17 | 1994-01-11 | Motorola, Inc. | Dielectric filter and shield therefor |
JP3252570B2 (en) * | 1993-10-15 | 2002-02-04 | 株式会社村田製作所 | Dielectric duplexer |
JP3067575B2 (en) * | 1995-03-08 | 2000-07-17 | 株式会社村田製作所 | Dielectric filter |
WO2001052344A1 (en) * | 2000-01-14 | 2001-07-19 | Cts Corporation | Ceramic bandstop monoblock filter with coplanar waveguide transmission lines |
JP3864974B2 (en) | 2005-01-18 | 2007-01-10 | 株式会社村田製作所 | Dielectric filter, dielectric duplexer, and communication device |
US8229366B2 (en) * | 2005-04-08 | 2012-07-24 | Qualcomm, Incorporated | Tunable duplexer with common node notch filter |
WO2006137470A1 (en) | 2005-06-23 | 2006-12-28 | Ube Industries, Ltd. | Dielectric filter for base station communication equipment |
JP6127630B2 (en) * | 2013-03-22 | 2017-05-17 | 宇部興産株式会社 | Dielectric resonant component |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1131114A (en) * | 1966-06-08 | 1968-10-23 | Marconi Co Ltd | Improvements in or relating to microwave filters |
JPS5717201A (en) * | 1980-07-07 | 1982-01-28 | Fujitsu Ltd | Dielectric substance filter |
JPS583301A (en) * | 1981-06-30 | 1983-01-10 | Fujitsu Ltd | Dielectric substance filter |
GB2109641B (en) * | 1981-10-02 | 1985-08-14 | Murata Manufacturing Co | Distributed constant type filter |
US4431977A (en) * | 1982-02-16 | 1984-02-14 | Motorola, Inc. | Ceramic bandpass filter |
EP0093956B1 (en) * | 1982-05-10 | 1989-09-06 | Oki Electric Industry Company, Limited | A dielectric filter |
JPS59114902A (en) * | 1982-12-21 | 1984-07-03 | Fujitsu Ltd | Dielectric filter |
JPS60254802A (en) * | 1984-05-30 | 1985-12-16 | Murata Mfg Co Ltd | Distributed constant type filter |
-
1985
- 1985-09-20 GB GB08523344A patent/GB2165098B/en not_active Expired
- 1985-09-24 JP JP60208980A patent/JPH0697721B2/en not_active Expired - Lifetime
-
1990
- 1990-09-06 SG SG73190A patent/SG73190G/en unknown
- 1990-10-25 HK HK88490A patent/HK88490A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2165098A (en) | 1986-04-03 |
JPH0697721B2 (en) | 1994-11-30 |
GB8523344D0 (en) | 1985-10-23 |
JPS61262301A (en) | 1986-11-20 |
GB2165098B (en) | 1988-05-25 |
SG73190G (en) | 1991-08-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2165098B (en) | Radio frequency filters | |
EP0115270A3 (en) | Frequency independent antenna | |
GB2163606B (en) | Dielectric filter | |
GB8523078D0 (en) | Low frequency speaker | |
GB8404638D0 (en) | Radio frequency transducer | |
GB8327656D0 (en) | Reduced radio frequency interference | |
GB8510337D0 (en) | High frequency coil | |
GB2169453B (en) | Radio frequency antenna system | |
EP0170225A3 (en) | Radio receiver | |
GB2160726B (en) | Frequency synthesizer | |
DE3471206D1 (en) | Polarisation-selective circuit for two frequency bands | |
EP0160223A3 (en) | High frequency amplifier | |
GB8520997D0 (en) | Radio frequency choke | |
GB2155262B (en) | Radio receiver | |
GB2188789B (en) | Radio frequency filter | |
GB8401795D0 (en) | Microwave filters | |
GB8321308D0 (en) | Radio frequency coil | |
GB2155711B (en) | Ultrahigh frequency active filter | |
GB2166009B (en) | Frequency divider circuit | |
GB8530190D0 (en) | Radio frequency filter | |
GB2182513B (en) | Low frequency digital notch filter | |
GB2167254B (en) | Frequency standards | |
GB8428159D0 (en) | Radio frequency synthesis | |
GB8415073D0 (en) | Audio frequency oscillator | |
GB8519588D0 (en) | Radio frequency coupler |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PE | Patent expired |
Effective date: 20050919 |