EP0260633B1 - Aus verschiedenen Elementen bestehendes Filter der E-Flächenart - Google Patents

Aus verschiedenen Elementen bestehendes Filter der E-Flächenart Download PDF

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Publication number
EP0260633B1
EP0260633B1 EP87113391A EP87113391A EP0260633B1 EP 0260633 B1 EP0260633 B1 EP 0260633B1 EP 87113391 A EP87113391 A EP 87113391A EP 87113391 A EP87113391 A EP 87113391A EP 0260633 B1 EP0260633 B1 EP 0260633B1
Authority
EP
European Patent Office
Prior art keywords
plane
filter
cavity
iris
separation
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.)
Expired - Lifetime
Application number
EP87113391A
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English (en)
French (fr)
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EP0260633A1 (de
Inventor
Mustafa Gurcan
Jean-Claude Cruchon
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.)
Alcatel CIT SA
Original Assignee
Alcatel Telspace SA
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Filing date
Publication date
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Publication of EP0260633A1 publication Critical patent/EP0260633A1/de
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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

Definitions

  • the invention relates to a broadband filter of the E-plane type.
  • Filtering techniques are very varied. But when the frequency or / and the power are high, filtering in a rectangular or cylindrical waveguide remains the only way to obtain good performance with regard to losses and selectivity.
  • circular cavity filters offer exceptional characteristics because they act with very high overvoltages.
  • the TE101 or "plane E” cavity filter is commonly applied up to 5 to 6% relative bandwidth. Beyond the end coupling susceptances become very low, the embodiments then become delicate if not practically impossible.
  • European patent application EP-A-0 045 242 describes a microwave band-pass filter produced as a waveguide and formed, in a single straight section of guide, by at least one resonant window whose shape determines the bandwidth filter bandwidth.
  • the invention provides a wide-band composite filter of plane type E comprising a conductive shielding body pierced with an elongated cavity in which a plane filter structure E is arranged longitudinally in the form of a lamella cut out from several rectangular openings, characterized in that said body has two adjoining parts to each other on either side of a separation plan, in that the cavity, of parallelepiped shape, is split by the separation plane into two volumes of the same shape, in that the plane filter structure E is embedded in two longitudinal notches machined in at least one of the two parts, and in that two irises, in the form of perforated strips of rectangular openings, are embedded respectively in two transverse notches machined in the two parts located at the two ends of the cavity.
  • waveguide filters with inductively coupled cavities are obtained by cascading resonant cavities which are each tuned, for example, by a screw, these cavities being coupled together by irises or by rod curtains.
  • the circuit equivalent to such filters consists of susceptances separated by transmission lines.
  • a plane filter E is in the form of a "scale" inserted in a waveguide along the axis of propagation.
  • the scale which constitutes the essential element of the filter can be entirely metallic, of the finned line type, uni or bilateral.
  • the equivalent circuit of this type of filter can be represented by a succession of symmetrical T circuits: each symmetrical T circuit having an influence equivalent to that of the "strips" or transverse lamellae constituting the scale.
  • the Ts, associated with the transmission lines, operate as admittance inverters, which performs the filtering function.
  • the reactors if X, X and X if ft branches T can be calculated from the work of YI-CHI SHIH (IEEE Vol. MTT-32 No. 7 July 1984).
  • the antenna filters In transmission systems, the antenna filters must have the lowest possible insertion losses. With the advent of wideband applications it is necessary to use filters accordingly.
  • Plan-E filters can be produced for bandwidths exceeding 10% in a frequency range from the X band (8-12 GHz) to the D band (110-175 GHz) with an overvoltage coefficient Q> 1000 .
  • the bandwidth is displaced towards the high frequencies and its width decreases.
  • the calculated relative bandwidth is therefore greater than that obtained in practice. This further contributes to decreasing W1 and W n .
  • the filter of the invention 10 comprises a conductive shielding body (11, 12) formed of two parts 11 and 12 joined to one another on either side of a separation plane 13.
  • This cavity contains a structure 15 of planar filter E having the shape of a lamella cut out from several rectangular openings one of the faces of which could be situated, for example, in the separation plane 13.
  • This lamella 15 has for example the shape of a ladder.
  • Two irises 16 and 17 are located at the inlet and at the outlet of the cavity 14 so as to conceal, each, a part thereof.
  • the structure 15 is an attached structure embedded in two longitudinal notches 18 and 19 machined, for example, in the two parts 11 and 12 on either side of the cavity 14.
  • the irises 16 and 17 have the form of perforated strips of vertical rectangular openings 24 as shown, for example in FIG. 3, embedded in two transverse notches 20 and 21 machined in the two parts 11, 12 and located at the two ends of the cavity 14.
  • the plane filter structure E as well as the two irises may be an integral part of one or the other of the two parts of the shielding body, and therefore not be added parts.

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Claims (5)

  1. E-Ebenen-Breitbandfilter mit einem leitenden Abschirmkörper (11, 12), der von einem länglichen Hohlraum (14) durchdrungen wird, in welchem eine E-Ebenen-Filterstruktur in Form einer Lamelle (15) in Längsrichtung angeordnet ist, wobei die Lamelle mehrere rechteckige Öffnungen besitzt, dadurch gekennzeichnet, daß der Körper zwei in einer Trennebene (13) aneinander anliegende Teile (11, 12) aufweist, daß der parallelepipedische Hohlraum (14) durch die Trennebene (13) in zwei Räume gleicher Form aufgeteilt ist, daß die E-Ebenen-Filterstruktur in zwei Längseinschnitte (18, 19) eingefügt ist, die in mindestens eines der beiden Teile (11, 12) eingearbeitet sind, und daß zwei Irisblenden (16, 17) in Form von Lamellen, die von rechteckigen Öffnungen (24) durchbrochen werden, in je einen von zwei Quereinschnitten (20, 21) eingefügt sind, die in die an den beiden Enden des Hohlraums (14) liegenden beiden Teile (11, 12) eingearbeitet sind.
  2. Filter nach Anspruch 1, dadurch gekennzeichnet, daß die EEbenen-Filterstruktur eine leiterförmige Lamelle (15) ist.
  3. Filter nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die E-Ebenenstruktur (15) eine Metallstruktur ist.
  4. Filter nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jede Irisblende (16, 17) aus einer von mindestens einer rechteckigen Öffnung (24) durchbrochenen Lamelle besteht, deren eine Richtung parallel zur Schnittlinie der Trennebene (13) und der Ebene jeder Irisblende verläuft.
  5. Filter nach Anspruch 4, dadurch gekennzeichnet, daß jede Irisblende (10, 17) eine Symmetrieachse besitzt, und daß die Öffnungen (24) jeder Irisblende symmetrisch zur Trennebene (13) im Inneren des Hohlraums angeordnet sind.
EP87113391A 1986-09-18 1987-09-14 Aus verschiedenen Elementen bestehendes Filter der E-Flächenart Expired - Lifetime EP0260633B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613083A FR2604305B1 (fr) 1986-09-18 1986-09-18 Filtre composite a large bande de type plan e
FR8613083 1986-09-18

Publications (2)

Publication Number Publication Date
EP0260633A1 EP0260633A1 (de) 1988-03-23
EP0260633B1 true EP0260633B1 (de) 1992-07-29

Family

ID=9339079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113391A Expired - Lifetime EP0260633B1 (de) 1986-09-18 1987-09-14 Aus verschiedenen Elementen bestehendes Filter der E-Flächenart

Country Status (5)

Country Link
US (1) US4800349A (de)
EP (1) EP0260633B1 (de)
JP (1) JPS63100801A (de)
DE (1) DE3780736T2 (de)
FR (1) FR2604305B1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138289A (en) * 1990-12-21 1992-08-11 California Institute Of Technology Noncontacting waveguide backshort
DE19523869A1 (de) * 1995-06-30 1997-01-02 Daimler Benz Aerospace Ag Hohlleiterfilter
KR100193865B1 (ko) * 1996-03-29 1999-06-15 윤종용 도체스트립을 이용한 e면 대역통과 여파기 설계방법
US6573808B1 (en) * 1999-03-12 2003-06-03 Harris Broadband Wireless Access, Inc. Millimeter wave front end
SE514630C2 (sv) * 1999-07-09 2001-03-26 Ericsson Telefon Ab L M Metod för framställning av mikrovågsfilter, samt mikrovågsfilter framställt enligt denna metod
DK174005B1 (da) 2000-01-21 2002-04-08 Ericsson Telefon Ab L M Duplexfilter af bølgeledertype
US6392508B1 (en) * 2000-03-28 2002-05-21 Nortel Networks Limited Tuneable waveguide filter and method of design thereof
US6657520B2 (en) * 2000-10-18 2003-12-02 Dragonwave, Inc. Waveguide filter
GB0202247D0 (en) * 2002-01-31 2002-03-20 Quasar Microwave Tech Electromagnetic filter assemblies
US6646526B2 (en) * 2002-03-14 2003-11-11 M/A-Com, Inc. Surface mountable microwave filter configuration and method of fabricating same
JP4502967B2 (ja) * 2006-04-05 2010-07-14 三菱電機株式会社 偏波変換器
JP4894777B2 (ja) * 2008-02-14 2012-03-14 日本電気株式会社 帯域通過フィルタ、該フィルタの製作方法、および該フィルタに使用される導体板
WO2010073554A1 (ja) * 2008-12-26 2010-07-01 日本電気株式会社 帯域通過フィルタ
WO2011145271A1 (ja) * 2010-05-20 2011-11-24 日本電気株式会社 バンドパスフィルタおよび無線アクセス装置
US9899716B1 (en) * 2015-03-01 2018-02-20 Telefonaktiebolaget Lm Ericsson (Publ) Waveguide E-plane filter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE481066A (de) * 1947-05-22
JPS583401B2 (ja) * 1972-05-23 1983-01-21 日本放送協会 マイクロハカイロ
US4028650A (en) * 1972-05-23 1977-06-07 Nippon Hoso Kyokai Microwave circuits constructed inside a waveguide
FR2487587A1 (fr) * 1980-07-22 1982-01-29 Thomson Csf Filtre passe-bande hyperfrequence realise en guide d'ondes
US4467294A (en) * 1981-12-17 1984-08-21 Vitalink Communications Corporation Waveguide apparatus and method for dual polarized and dual frequency signals
CA1221750A (en) * 1983-11-21 1987-05-12 Richard D. Carver Mounting dielectric resonators
IT1180685B (it) * 1984-03-02 1987-09-23 Selenia Spazio Spa Sfasatore differenziale operante in larga banda di frequenza con sfasamento differenziale costante

Also Published As

Publication number Publication date
US4800349A (en) 1989-01-24
FR2604305A1 (fr) 1988-03-25
DE3780736D1 (de) 1992-09-03
FR2604305B1 (fr) 1988-12-02
EP0260633A1 (de) 1988-03-23
JPS63100801A (ja) 1988-05-02
DE3780736T2 (de) 1993-02-04

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