EP0508733A2 - Filtre céramique ajustable - Google Patents

Filtre céramique ajustable Download PDF

Info

Publication number
EP0508733A2
EP0508733A2 EP92303091A EP92303091A EP0508733A2 EP 0508733 A2 EP0508733 A2 EP 0508733A2 EP 92303091 A EP92303091 A EP 92303091A EP 92303091 A EP92303091 A EP 92303091A EP 0508733 A2 EP0508733 A2 EP 0508733A2
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
filter
conductive member
dielectric block
resonators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92303091A
Other languages
German (de)
English (en)
Other versions
EP0508733A3 (en
Inventor
Pauli Nappa
Keijo Salonen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pulse Finland Oy
Original Assignee
LK Products Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LK Products Oy filed Critical LK Products Oy
Publication of EP0508733A2 publication Critical patent/EP0508733A2/fr
Publication of EP0508733A3 publication Critical patent/EP0508733A3/en
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • parallel resonance circuits are formed corresponding to coaxial resonators where the inner conductor is the coating in the hole and the outer conductor the coating covering the outer surfaces of the block, whereby the field energy exists in the dielectric material.
  • Each resonator thus comprises a shorted transmission line, because the coating at the bottom of each hole directly joins the coating of the outer surface of the block.
  • At the top of the transmission line there is a load capacitance consisting of the capacitance between the top of the hole and the coating on the outer surface of the block.
  • the resonators in the row are like the teeth in a comb, joined by the continuous coating on the bottom surface of the block, hence the term comb filter.
  • a filter in accordance with the invention permits adjustment of the frequency of the resonators and the coupling between them, which is fast and easy to realize and without the above mentioned disadvantages.
  • the adjustment works in both directions and may be performed at the same time as measurements.
  • the mask, the components and the connectors can also be located on the side surface 5 of the dielectric block, the side surface then being uncoated like the top surface.
  • Figure 1 shows just this case, although the invention is not limited to this embodiment.
  • a cover 2 of conductive material covering the sides 3 and 4 of the ceramic block 1, so that the surface 9 of the cover is not quite abutting the surface 5 and so that the surface 10 is not quite abutting the surface 3.
  • the cover is most easily fastened by soldering it at the edges to the coating 4 on the ceramic block 1.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP19920303091 1991-04-12 1992-04-08 Adjustable ceramic filter Withdrawn EP0508733A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI911795A FI87852C (fi) 1991-04-12 1991-04-12 Avstaembart keramiskt filter och foerfarande foer dess avstaemning
FI911795 1991-04-12

Publications (2)

Publication Number Publication Date
EP0508733A2 true EP0508733A2 (fr) 1992-10-14
EP0508733A3 EP0508733A3 (en) 1993-01-13

Family

ID=8532314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920303091 Withdrawn EP0508733A3 (en) 1991-04-12 1992-04-08 Adjustable ceramic filter

Country Status (5)

Country Link
EP (1) EP0508733A3 (fr)
JP (1) JPH0661704A (fr)
AU (1) AU1398492A (fr)
CA (1) CA2065714A1 (fr)
FI (1) FI87852C (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420554A (en) * 1994-03-30 1995-05-30 Motorola, Inc. Method and apparatus for adjusting a resonant frequency of a transmission line resonator assembly
EP0663702A1 (fr) * 1994-01-18 1995-07-19 Lk-Products Oy Résonateur diélectrique
EP0712177A1 (fr) * 1994-11-11 1996-05-15 Murata Manufacturing Co., Ltd. Dispositif d'antenne
US5666093A (en) * 1995-08-11 1997-09-09 D'ostilio; James Phillip Mechanically tunable ceramic bandpass filter having moveable tabs
WO1998001918A1 (fr) * 1996-07-09 1998-01-15 Motorola Inc. Filtre en ceramique a blindage coplanaire
EP1246291A2 (fr) * 2001-03-29 2002-10-02 TDK Corporation Blindage pour filtre diélectrique et filtre diélectrique l' incorporant
US9716301B2 (en) 2012-02-27 2017-07-25 Kmw Inc. 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
GB2555180A (en) * 2016-07-29 2018-04-25 Radio Design Ltd Filter apparatus and method of use thereof
US10454149B2 (en) 2016-11-08 2019-10-22 LDS Innovations LLC Tuning and measurement fixtures for ceramic filters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013093976A1 (fr) * 2011-12-22 2013-06-27 Nec Corporation Éléments résonants accordables et filtre basé sur ces éléments
KR101693214B1 (ko) * 2014-10-28 2017-01-05 주식회사 케이엠더블유 캐비티 구조를 가진 무선 주파수 필터

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496177A (fr) * 1966-08-09 1967-09-29 Nippon Electric Co Filtre d'onde à haute fréquence
JPS59139701A (ja) * 1983-01-30 1984-08-10 Nippon Dengiyou Kosaku Kk コムライン型帯域通過ろ波器
GB2165098A (en) * 1984-09-27 1986-04-03 Motorola Inc Radio frequency filters
JPS62168413A (ja) * 1986-01-20 1987-07-24 Sanyo Electric Co Ltd チユ−ナの複同調回路
JPS63187902A (ja) * 1987-01-30 1988-08-03 Murata Mfg Co Ltd 一体成型誘電体共振器の結合調整機構
GB2212671A (en) * 1987-11-23 1989-07-26 Solitra Oy Stripline circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496177A (fr) * 1966-08-09 1967-09-29 Nippon Electric Co Filtre d'onde à haute fréquence
JPS59139701A (ja) * 1983-01-30 1984-08-10 Nippon Dengiyou Kosaku Kk コムライン型帯域通過ろ波器
GB2165098A (en) * 1984-09-27 1986-04-03 Motorola Inc Radio frequency filters
JPS62168413A (ja) * 1986-01-20 1987-07-24 Sanyo Electric Co Ltd チユ−ナの複同調回路
JPS63187902A (ja) * 1987-01-30 1988-08-03 Murata Mfg Co Ltd 一体成型誘電体共振器の結合調整機構
GB2212671A (en) * 1987-11-23 1989-07-26 Solitra Oy Stripline circuit

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 465 (E-690)(3312) 7 December 1988 & JP-A-63 187 902 ( MURATA MANUFACTURING CO LTD ) 3 August 1988 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 7 (E-571)9 January 1988 & JP-A-62 168 413 ( SANYO ELECTRIC CO LTD ) 24 July 1987 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 268 (E-283)7 December 1984 & JP-A-59 139 701 ( NIHON DENGIYOU KOUSAKU K.K. ) 10 August 1984 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0663702A1 (fr) * 1994-01-18 1995-07-19 Lk-Products Oy Résonateur diélectrique
US5550519A (en) * 1994-01-18 1996-08-27 Lk-Products Oy Dielectric resonator having a frequency tuning element extending into the resonator hole
US5420554A (en) * 1994-03-30 1995-05-30 Motorola, Inc. Method and apparatus for adjusting a resonant frequency of a transmission line resonator assembly
EP0712177A1 (fr) * 1994-11-11 1996-05-15 Murata Manufacturing Co., Ltd. Dispositif d'antenne
US5691732A (en) * 1994-11-11 1997-11-25 Murata Manufacturing Co., Ltd. Surface mounted chassis antenna atop dielectric base plate and having removable edge portions for tuning resonance
US5666093A (en) * 1995-08-11 1997-09-09 D'ostilio; James Phillip Mechanically tunable ceramic bandpass filter having moveable tabs
WO1998001918A1 (fr) * 1996-07-09 1998-01-15 Motorola Inc. Filtre en ceramique a blindage coplanaire
US5745018A (en) * 1996-07-09 1998-04-28 Motorola Inc. Ceramic filter with a coplanar shield
EP1246291A2 (fr) * 2001-03-29 2002-10-02 TDK Corporation Blindage pour filtre diélectrique et filtre diélectrique l' incorporant
EP1246291A3 (fr) * 2001-03-29 2005-01-19 TDK Corporation Blindage pour filtre diélectrique et filtre diélectrique l' incorporant
US9716301B2 (en) 2012-02-27 2017-07-25 Kmw Inc. 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
US10090572B1 (en) 2012-02-27 2018-10-02 Kmw Inc. Radio frequency filter having a hollow box with a resonance element disposed therein and a depression with dot peen structures therein
GB2555180A (en) * 2016-07-29 2018-04-25 Radio Design Ltd Filter apparatus and method of use thereof
GB2555180B (en) * 2016-07-29 2021-06-09 Radio Design Ltd Filter apparatus and method of use thereof
US10454149B2 (en) 2016-11-08 2019-10-22 LDS Innovations LLC Tuning and measurement fixtures for ceramic filters

Also Published As

Publication number Publication date
EP0508733A3 (en) 1993-01-13
AU1398492A (en) 1992-10-15
CA2065714A1 (fr) 1992-10-13
FI87852B (fi) 1992-11-13
FI87852C (fi) 1993-02-25
FI911795A0 (fi) 1991-04-12
JPH0661704A (ja) 1994-03-04

Similar Documents

Publication Publication Date Title
EP0100350B1 (fr) Filtre ceramique passe-bande
US4742562A (en) Single-block dual-passband ceramic filter useable with a transceiver
EP0401839B1 (fr) Filtre céramique passe-bande
US4963843A (en) Stripline filter with combline resonators
US6175727B1 (en) Suspended printed inductor and LC-type filter constructed therefrom
EP0706719B2 (fr) Filtre ceramique duplex ameliore
US5130683A (en) Half wave resonator dielectric filter construction having self-shielding top and bottom surfaces
GB2165098A (en) Radio frequency filters
WO1996008848A2 (fr) Procede de syntonisation d'un reseau sommateur de station de base et filtre passe-bande
US6737943B2 (en) Dielectric device with partially closed hole
EP0508733A2 (fr) Filtre céramique ajustable
WO1995030249A1 (fr) Procede ameliore permettant d'accorder un filtre ceramique duplex
JPH0690104A (ja) 誘電体共振器および誘電体共振部品
US5278527A (en) Dielectric filter and shield therefor
US5218329A (en) Low profile ceramic filter with self aligning shield
JPH01503428A (ja) 複数共振器要素‐実装可能フィルタ
US5351020A (en) Band-pass filter having three or more loop-shaped electrodes
EP1025608B1 (fr) Duplexeur a resonateurs a impedances echelonnees
US6525625B1 (en) Dielectric duplexer and communication apparatus
KR100262499B1 (ko) 일체형듀플렉서유전체필터
JP2004364248A (ja) 誘電体フィルタ、誘電体デュプレクサおよび通信装置
US6404306B1 (en) Dielectric ceramic filter with improved electrical characteristics in high side of filter passband
JP2005191983A (ja) 誘電体フィルタ、誘電体デュプレクサ、および通信装置
US5859575A (en) Dielectric filter
EP0485142A1 (fr) Filtre céramique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE DK FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE DK FR GB IT LI SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930714