EP3796464A1 - Polariseur de guide d'ondes - Google Patents

Polariseur de guide d'ondes Download PDF

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Publication number
EP3796464A1
EP3796464A1 EP19198160.4A EP19198160A EP3796464A1 EP 3796464 A1 EP3796464 A1 EP 3796464A1 EP 19198160 A EP19198160 A EP 19198160A EP 3796464 A1 EP3796464 A1 EP 3796464A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
polarizer
ridge
waveguide polarizer
central axis
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Withdrawn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
EP19198160.4A
Other languages
German (de)
English (en)
Inventor
Biser Nikolov
Ahmed Halid Akgiray
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.)
Alcan Systems GmbH
Original Assignee
Alcan Systems GmbH
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 Alcan Systems GmbH filed Critical Alcan Systems GmbH
Priority to EP19198160.4A priority Critical patent/EP3796464A1/fr
Publication of EP3796464A1 publication Critical patent/EP3796464A1/fr
Withdrawn legal-status Critical Current

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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
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
    • H01P1/171—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a corrugated or ridged waveguide section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
    • H01P1/172—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a dielectric element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H01P3/123—Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H01P3/127—Hollow waveguides with a circular, elliptic, or parabolic cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/06—Waveguide mouths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials

Definitions

  • the invention relates to a waveguide polarizer for polarizing a radio frequency signal with a hollow waveguide body extending along a central axis between a first open end and a second open end, whereby the waveguide body comprises a body wall of an electrically conductive material, whereby the body wall encloses a waveguide cavity and whereby in a section of the waveguide body the body wall is recessed outwardly as to form a groove in the waveguide body extending at least sectionwise along the central axis.
  • a waveguide for polarizing a radio frequency signal converts a linearly polarized radio frequency signal to a circularly polarized radio frequency signal or vice versa when transmitting a radio frequency signal from a first open end to a second open end.
  • radio frequency comprises a range of frequencies from 30 MHz to 300 GHz.
  • the waveguide for polarizing a radio frequency signal operates by separating an incoming radio frequency signal into two orthogonal radio frequency signal components and delaying one of the orthogonal radio frequency signal components by a 90 degree phase shift with respect to the other orthogonal radio frequency signal component.
  • US 6,664,866 B2 teaches that said 90 degree phase shift between the orthogonal radio frequency signal components can be obtained by arranging for at least one groove formed along a central axis inside a circular hollow waveguide.
  • the radio frequency signal propagates as electromagnetic waves along the hollow waveguide body.
  • electromagnetic waves cannot propagate along the hollow waveguide polarizer.
  • the cut-off frequency is inversely related to the largest dimension of a waveguide cavity orthogonal to the central axis of the waveguide polarizer, there is a minimal size requirement for the waveguide polarizer for a given frequency. This minimal size requirement can impede in particular a space saving integration into polarizing waveguide feeds and polarizing open waveguide radiating elements of antenna arrays.
  • the present invention relates to a waveguide polarizer as described above, characterized in that the waveguide polarizer comprises at least one ridge element of the conductive material, with the at least one ridge element arranged at a non-recessed section of the body wall of the waveguide body projecting inwardly from the body wall and extending at least sectionwise along the central axis.
  • the cut-off frequency of the waveguide polarizer is reduced by arranging the at least one ridge element within the waveguide body. In such a way the waveguide polarizer can be manufactured with smaller dimensions orthogonal to the central axis for a given cut-off frequency, allowing for miniaturization of the waveguide polarizer.
  • the at least one ridge element can have a different effect on the two orthogonal radio frequency components propagating along the waveguide body.
  • an axial length of the waveguide body, necessary for effecting the 90 degree phase shift between the orthogonal radio frequency components, can be shortened.
  • the ridge element can extend from the first open end to the second open end of the waveguide body.
  • the at least one ridge element can extend only sectionwise along the waveguide body.
  • a cross section of the at least one ridge element orthogonal to the central axis is square or rectangular.
  • the at least one ridge element comprises a ridge tail surface oriented towards the central axis and two sidewall surfaces, with the latter two connecting the ridge tail surface of the at least one ridge element with the adjacent part of the body wall.
  • the cross section of the at least one ridge element can also be semi-circular or semi-oval.
  • a length and a width of the at least one ridge element can be constant along the central axis. It is also possible that the length or the width of the at least one ridge element or both vary along the central axis.
  • the hollow waveguide body can be fabricated from a suitable metallic conductor as e.g. copper or aluminium.
  • An inwardly oriented side of the waveguide body is advantageously coated with silver or gold.
  • the groove can be formed as a non-continuous recess in the body wall of the waveguide body. It is also possible that the waveguide body is multi-piece with a central piece with a continuous recess and a lid element covering the continuous recess of the central piece, thus forming the groove.
  • the waveguide polarizer comprises a first pair of opposing ridge elements. More preferably the waveguide polarizer comprises a second pair of opposing ridge elements. Most preferably the first and the second pair of opposing ridge elements are arranged orthogonal to each other.
  • a cross section orthogonal to the central axis of the non-recessed section of the waveguide body is circular.
  • the waveguide body comprises a supporting groove extending along the central axis.
  • the supporting groove is arranged opposite to the groove. In such a way the axial length of the waveguide necessary for effecting the 90 degree phase shift between the orthogonal radio frequency components can be further shortened.
  • an adapting element comprising a dielectric material with a relative permittivity larger than air is arranged inside the waveguide body.
  • a dielectric material inside the waveguide body, the cut-off frequency of the waveguide polarizer can be further reduced.
  • the waveguide polarizer comprising the adapting element can be manufactured using smaller lateral dimensions as a waveguide polarizer without the adapting element.
  • the dielectric material can be fabricated from suitable materials as polytetrafluoroethylene (PTFE), acrylonitrile butadiene styrene (ABS), silicone dioxide, silicone dioxide, epoxy resin, aluminium dioxide or a combination thereof.
  • the dielectric material can be a composite material like, for instance, glass-reinforced epoxy laminate.
  • Figure 2 illustrates a sectional view of the waveguide polarizer 1 as shown in figure 1 taken along the line II-II.
  • the ridge elements 11 comprise opposing ridge tail surfaces 18.
  • the opposing ride tail surfaces 18 of the ridge elements are connected via side wall surfaces 19 with adjacent sections of the body wall 6.
  • Figure 5 illustrates a perspective view of an alternative embodiment of the waveguide polarizer 1.
  • Figures 6 and 7 illustrate sectional views along the line VI-VI and VII-VII of the embodiment of the waveguide polarizer 1 illustrated in figure 5 .
  • the sectional view in figure 7 is downsized as compared to figures 5 and 6 .
  • the embodiment of the waveguide polarizer 1 depicted in figures 5, 6 and 7 comprises a waveguide body 2 formed in one piece with a square outline and a substantially circular inner side.
  • the groove 7 and the supporting groove are formed by non-continuous recesses in the body wall 6 of the waveguide body 2.

Landscapes

  • Waveguide Aerials (AREA)
EP19198160.4A 2019-09-18 2019-09-18 Polariseur de guide d'ondes Withdrawn EP3796464A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19198160.4A EP3796464A1 (fr) 2019-09-18 2019-09-18 Polariseur de guide d'ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19198160.4A EP3796464A1 (fr) 2019-09-18 2019-09-18 Polariseur de guide d'ondes

Publications (1)

Publication Number Publication Date
EP3796464A1 true EP3796464A1 (fr) 2021-03-24

Family

ID=67998001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198160.4A Withdrawn EP3796464A1 (fr) 2019-09-18 2019-09-18 Polariseur de guide d'ondes

Country Status (1)

Country Link
EP (1) EP3796464A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020044097A1 (en) * 2000-07-27 2002-04-18 Alps Electric Co., Ltd. Circular-Polarized-wave converter
US6664866B2 (en) 1999-12-10 2003-12-16 Mitsubishi Denki Kabushiki Kaisha Generator of circularly polarized wave
CN107275724A (zh) * 2017-06-16 2017-10-20 成都赛纳为特科技有限公司 具有扩展带宽功能的宽带插片圆极化器
US9972897B1 (en) * 2017-08-09 2018-05-15 Northrop Grumman Systems Corporation L-band array element with integrated triplexer for GPS payloads

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6664866B2 (en) 1999-12-10 2003-12-16 Mitsubishi Denki Kabushiki Kaisha Generator of circularly polarized wave
US20020044097A1 (en) * 2000-07-27 2002-04-18 Alps Electric Co., Ltd. Circular-Polarized-wave converter
CN107275724A (zh) * 2017-06-16 2017-10-20 成都赛纳为特科技有限公司 具有扩展带宽功能的宽带插片圆极化器
US9972897B1 (en) * 2017-08-09 2018-05-15 Northrop Grumman Systems Corporation L-band array element with integrated triplexer for GPS payloads

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YONEDA N ET AL: "A DESIGN OF NOVEL GROOVED CIRCULAR WAVEGUIDE POLARIZERS", 2000 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST. IMS 2000. BOSTON, MA, JUNE 11-16, 2000; [IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM], NEW YORK, NY : IEEE, US, 11 June 2000 (2000-06-11), pages 1449 - 1452, XP000967499, ISBN: 978-0-7803-5688-7 *

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