EP0902496A3 - Mode filter for the connection of two electromagnetic waveguides - Google Patents

Mode filter for the connection of two electromagnetic waveguides Download PDF

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Publication number
EP0902496A3
EP0902496A3 EP98402039A EP98402039A EP0902496A3 EP 0902496 A3 EP0902496 A3 EP 0902496A3 EP 98402039 A EP98402039 A EP 98402039A EP 98402039 A EP98402039 A EP 98402039A EP 0902496 A3 EP0902496 A3 EP 0902496A3
Authority
EP
European Patent Office
Prior art keywords
pipe section
cross
another
waveguides
mode filter
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.)
Granted
Application number
EP98402039A
Other languages
German (de)
French (fr)
Other versions
EP0902496B1 (en
EP0902496A2 (en
Inventor
Dietmar Schulz
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
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP0902496A2 publication Critical patent/EP0902496A2/en
Publication of EP0902496A3 publication Critical patent/EP0902496A3/en
Application granted granted Critical
Publication of EP0902496B1 publication Critical patent/EP0902496B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/082—Transitions between hollow waveguides of different shape, e.g. between a rectangular and a circular waveguide

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Filters And Equalizers (AREA)

Abstract

Es wird ein Modenfilter zur Verbindung von zwei elektromagnetischen Hohlleitern mit unterschiedlichen Querschnittsformen angegeben. Es besteht aus einem Rohrstück (4), das an seinen Enden Öffnungen hat, deren Querschnitte den Querschnitten der beiden unterschiedlichen Hohlleiter entsprechen und dessen Innenraum (11) von der einen Querschnittsform in die andere übergeht. Im Innenraum des Rohrstücks (4) sind zur Minimierung unerwünschter Moden der zu übertragenden elektromagnetischen Wellen im Übergangsbereich zwischen den beiden Querschnittsformen zwei in radialer Richtung in dasselbe hineinragende und in seiner Achsrichtung verlaufende, flache Elemente (14,15) aus elektrisch gut leitendem Material angebracht. Die Elemente (14,15) sind von der Wandung des Rohrstücks (4) ausgehend durch einen Zwischenraum (16) voneinander getrennt und miteinander fluchtend in der gleichen Ebene einander diametral gegenüber liegend angeordnet. Ihre axiale Länge ist kurz im Verhältnis zur Länge des Rohrstücks (4) und ebenso wie ihr Abstand (A) voneinander entsprechend einer Minimierung der Welligkeit von Gruppenlaufzeit und Amplitude der zu übertragenden Welle bemessen, welche durch Überlagerung aller angeregten Moden hervorgerufen wird.

Figure 00000001
A mode filter for connecting two electromagnetic waveguides with different cross-sectional shapes is specified. It consists of a pipe section (4) which has openings at its ends, the cross sections of which correspond to the cross sections of the two different waveguides and whose interior (11) changes from one cross-sectional shape to the other. In order to minimize undesired modes of the electromagnetic waves to be transmitted in the transition area between the two cross-sectional shapes, two flat elements (14, 15) protruding in the radial direction and extending in its axial direction are made in the interior of the pipe section (4) and are made of highly conductive material. Starting from the wall of the pipe section (4), the elements (14, 15) are separated from one another by an intermediate space (16) and are arranged in diametrically opposite relationship with one another in the same plane. Their axial length is short in relation to the length of the pipe section (4) and, like their distance (A) from one another, is dimensioned in accordance with a minimization of the ripple of group delay and amplitude of the wave to be transmitted, which is caused by superposition of all excited modes.
Figure 00000001
EP98402039A 1997-09-10 1998-08-11 Mode filter for the connection of two electromagnetic waveguides Expired - Lifetime EP0902496B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19739589 1997-09-10
DE19739589A DE19739589A1 (en) 1997-09-10 1997-09-10 Mode filter for connecting two electromagnetic waveguides

Publications (3)

Publication Number Publication Date
EP0902496A2 EP0902496A2 (en) 1999-03-17
EP0902496A3 true EP0902496A3 (en) 2000-04-26
EP0902496B1 EP0902496B1 (en) 2005-10-26

Family

ID=7841781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402039A Expired - Lifetime EP0902496B1 (en) 1997-09-10 1998-08-11 Mode filter for the connection of two electromagnetic waveguides

Country Status (5)

Country Link
US (1) US6130586A (en)
EP (1) EP0902496B1 (en)
AU (1) AU739585B2 (en)
BR (1) BR9803406A (en)
DE (2) DE19739589A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1223636A1 (en) * 2000-12-19 2002-07-17 Spinner GmbH Elektrotechnische Fabrik Overmoded hollow waveguide transition and its manufacturing method
US7893789B2 (en) * 2006-12-12 2011-02-22 Andrew Llc Waveguide transitions and method of forming components
US9531048B2 (en) 2013-03-13 2016-12-27 Space Systems/Loral, Llc Mode filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758882A (en) * 1970-11-11 1973-09-11 Licentia Gmbh Polarization converter for microwaves
US3818383A (en) * 1973-02-27 1974-06-18 Andrew Corp Elliptical-to-rectangular waveguide transition
JPS60125001A (en) * 1983-12-12 1985-07-04 Matsushita Electric Ind Co Ltd Waveguide converter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271229B (en) * 1965-02-25 1968-06-27 Telefunken Patent Broadband, low-reflection transition element for connecting an approximately elliptical waveguide to a rigid rectangular waveguide
US4100514A (en) * 1977-04-28 1978-07-11 Gte Sylvania Incorporated Broadband microwave polarizer device
US4344053A (en) * 1981-02-12 1982-08-10 Litton Systems, Inc. Mode suppressor for circular waveguides utilizing a plurality of resistance cards
US4553112A (en) * 1983-05-31 1985-11-12 Andrew Corporation Overmoded tapered waveguide transition having phase shifted higher order mode cancellation
US4540959A (en) * 1983-11-22 1985-09-10 Andrew Corporation Rectangular to elliptical waveguide connection
EP0309850B1 (en) * 1987-09-28 1993-08-11 Siemens Aktiengesellschaft Spurious electromagnetic-mode suppression arrangement in a waveguide installation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758882A (en) * 1970-11-11 1973-09-11 Licentia Gmbh Polarization converter for microwaves
US3818383A (en) * 1973-02-27 1974-06-18 Andrew Corp Elliptical-to-rectangular waveguide transition
JPS60125001A (en) * 1983-12-12 1985-07-04 Matsushita Electric Ind Co Ltd Waveguide converter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUANG J ET AL: "FREQUENCY-DOMAIN TLM ANALYSIS OF THE TRANSITION FROM RECTANGULAR TOCIRCULAR WAVEGUIDES", IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST,US,NEW YORK, IEEE, 1994, pages 705 - 708, XP000516648, ISBN: 0-7803-1779-3 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 284 (E - 357)<2007> 12 November 1985 (1985-11-12) *

Also Published As

Publication number Publication date
AU739585B2 (en) 2001-10-18
AU8198098A (en) 1999-03-25
DE59813133D1 (en) 2005-12-01
US6130586A (en) 2000-10-10
DE19739589A1 (en) 1999-03-11
BR9803406A (en) 1999-11-03
EP0902496B1 (en) 2005-10-26
EP0902496A2 (en) 1999-03-17

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