EP0593635A1 - Mikrowellenfilter - Google Patents

Mikrowellenfilter

Info

Publication number
EP0593635A1
EP0593635A1 EP92915388A EP92915388A EP0593635A1 EP 0593635 A1 EP0593635 A1 EP 0593635A1 EP 92915388 A EP92915388 A EP 92915388A EP 92915388 A EP92915388 A EP 92915388A EP 0593635 A1 EP0593635 A1 EP 0593635A1
Authority
EP
European Patent Office
Prior art keywords
cavities
microwave filter
filter
wall
series
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Withdrawn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
EP92915388A
Other languages
English (en)
French (fr)
Inventor
Philip David 8 Moor Park Close Addingham Sleigh
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.)
Teledyne Defence Ltd
Original Assignee
Filtronic Components Ltd
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 Filtronic Components Ltd filed Critical Filtronic Components Ltd
Publication of EP0593635A1 publication Critical patent/EP0593635A1/de
Withdrawn legal-status Critical Current

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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Definitions

  • This invention relates to a microwave filter fo filtering input signals to within a predetermined frequenc band.
  • a diplexer may comprise two filters in accordance with the invention, one a transmission filter and the second a receive filter.
  • the diplexer may be used for example in a cellular radio base station, typically with the transmission filter having a passband of 935 to 960 MHz and the receive filter a passband of 890 to 915 MHz.
  • the diplexer comprises a singl body 10 in which the two filters Fl and F2 are formed.
  • Bod 10 is rectangular in shape in the example shown.
  • Each cavity has a coaxial, cylindrical elemen 30 upstanding from its base to form a resonator for th respective resonant cavity.
  • the common coaxial terminal 31 ha its centre pin connected via conductors 32,33 to the resonator 30 of the first resonant cavities 11,21 of the respectiv filters F1,F2.
  • the resonators of the last resonant cavit 16,26 of the respective filters are connected by conductor 34,35 to the centre pin of coaxial terminals 36,37.
  • each filter adjacent cylindrical resonant cavitie e.g. 12,13 are physically separated by a thin wall 40, but ar inductively coupled together through a rectangular aperture 4 formed in the centre of this wall and extending towards th base of the cavities from the top surface of the body 10.
  • the remaining portions of the wall 40 either side o the coupling aperture or iris 41, terminate short of the to surface of the body 10, as shown in Figures 3 and 4.
  • a portion 42 of the wall 40 remains at the bas of the cavities.
  • the portions of the wall with upper surfaces short of the top surface of the body 10 are indicated by W: each of these lies between the adjacent edge of the iris 41 and a line e.g. L which is tangential to the two adjacent cavities.
  • a flat lid 44 is fixed against the top surface of the body 10 to close the resonant cavities.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
EP92915388A 1991-07-11 1992-07-13 Mikrowellenfilter Withdrawn EP0593635A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB91149708 1991-07-11
GB919114970A GB9114970D0 (en) 1991-07-11 1991-07-11 Microwave filter
PCT/GB1992/001275 WO1993001625A1 (en) 1991-07-11 1992-07-13 Microwave filter

Publications (1)

Publication Number Publication Date
EP0593635A1 true EP0593635A1 (de) 1994-04-27

Family

ID=10698188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92915388A Withdrawn EP0593635A1 (de) 1991-07-11 1992-07-13 Mikrowellenfilter

Country Status (3)

Country Link
EP (1) EP0593635A1 (de)
GB (1) GB9114970D0 (de)
WO (1) WO1993001625A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6313721B1 (en) * 1999-08-06 2001-11-06 Ube Electronics, Ltd. High performance dielectric ceramic filter using a non-linear array of holes

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5990763A (en) 1996-08-05 1999-11-23 Adc Solitra Oy Filter having part of a resonator and integral shell extruded from one basic block
SE510960C2 (sv) * 1997-11-21 1999-07-12 Ericsson Telefon Ab L M Vågledarfilter
US6255917B1 (en) * 1999-01-12 2001-07-03 Teledyne Technologies Incorporated Filter with stepped impedance resonators and method of making the filter
FI113578B (fi) 1999-03-03 2004-05-14 Filtronic Lk Oy Resonaattorisuodatin
US20030052749A1 (en) * 2001-09-04 2003-03-20 In Kui Cho Resonator, method for manufacturing filter by using resonator and filter manufactured by the same method
US6876277B2 (en) 2001-12-26 2005-04-05 Dragonwave, Inc. E-plane filter and a method of forming an E-plane filter
US9564672B2 (en) * 2011-03-22 2017-02-07 Intel Corporation Lightweight cavity filter structure
US9202660B2 (en) 2013-03-13 2015-12-01 Teledyne Wireless, Llc Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes
GB2524835A (en) * 2014-04-04 2015-10-07 Kathrein Werke Kg Cover lid, housing for electric or electromagnetic applications and method of assembly of a HF housing
KR101980791B1 (ko) * 2016-02-05 2019-05-21 스피너 게엠베하 Pim 측정들을 위한 필터 구조물들

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL290834A (de) * 1962-03-30
US3571768A (en) * 1969-09-25 1971-03-23 Motorola Inc Microwave resonator coupling having two coupling apertures spaced a half wavelength apart
DE2327912C2 (de) * 1973-06-01 1982-05-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kapazitiv gekoppeltes Hohlraumresonatorfilter
DE2640210C3 (de) * 1976-09-07 1979-05-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Filter für sehr kurze elektromagnetische Wellen
US4307357A (en) * 1980-03-04 1981-12-22 Tektronix, Inc. Foreshortened coaxial resonators
US4431977A (en) * 1982-02-16 1984-02-14 Motorola, Inc. Ceramic bandpass filter
EP0235123B1 (de) * 1985-07-08 1991-11-21 Space Systems / Loral, Inc. Dielektrischer resonatorfilter mit schmaler bandbreite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9301625A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6313721B1 (en) * 1999-08-06 2001-11-06 Ube Electronics, Ltd. High performance dielectric ceramic filter using a non-linear array of holes

Also Published As

Publication number Publication date
WO1993001625A1 (en) 1993-01-21
GB9114970D0 (en) 1991-08-28

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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

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17P Request for examination filed

Effective date: 19940126

AK Designated contracting states

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Designated state(s): DE FR GB

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

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18D Application deemed to be withdrawn

Effective date: 19960201