EP0928041A1 - Übergang zwischen einem Hohlleiter und einer koplanaren Leitung - Google Patents

Übergang zwischen einem Hohlleiter und einer koplanaren Leitung Download PDF

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Publication number
EP0928041A1
EP0928041A1 EP98403062A EP98403062A EP0928041A1 EP 0928041 A1 EP0928041 A1 EP 0928041A1 EP 98403062 A EP98403062 A EP 98403062A EP 98403062 A EP98403062 A EP 98403062A EP 0928041 A1 EP0928041 A1 EP 0928041A1
Authority
EP
European Patent Office
Prior art keywords
line
patch
substrate
waveguide
transition
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Withdrawn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
EP98403062A
Other languages
English (en)
French (fr)
Inventor
Olivier Maillet
Loic Guenno
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
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 EP0928041A1 publication Critical patent/EP0928041A1/de
Withdrawn legal-status Critical Current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
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
    • H01P5/107—Hollow-waveguide/strip-line transitions

Definitions

  • the subject of the present invention is a transition between a waveguide and a coplanar line.
  • the invention relates to the field of microwave or microwave circuits. More specifically, it concerns the transitions between various types of conductors microwave or microwave, namely the transitions between the coplanar lines and waveguides.
  • a passive microwave component is called "transition" allowing to pass from a signal propagation medium to another.
  • crest waveguides waveguides
  • waveguides to allow coupling with a line coplanar or a micro-ribbon line, have a mechanical crest allowing a contact with the coplanar line, or with a suspended micro-ribbon circuit.
  • An example of crested waveguide is given in the French patent application filed at applicant's name on 01.10.96 under number 9611941, under the title "Transition between a crest waveguide and a planar circuit ".
  • This type of transition has the disadvantage of requiring complex machining waveguide to form the ridge; it also involves a complicated assembly of the liaison.
  • the solution presented in the aforementioned patent application overcomes the latter disadvantage; it does not overcome the machining constraint of the crest of the waveguide.
  • Transitions with localized constants have also been proposed, presenting a dimension smaller than the guided wavelength.
  • Such transitions are usually formed by a probe entering the waveguide, perpendicular to the direction of extension of this waveguide and connected to a planar circuit.
  • the probe may consist of the core of a coaxial circuit or of the end of a metal line etched on a substrate whose other end is locally demetallized.
  • the disadvantage of this type of transition is that it requires a 90 ° change of direction of the microwave signal. and that the size of the transition is important.
  • These transitions are difficult to implement and do not do not have a wide adaptation band.
  • these transitions are of a montage delicate, and always include a lid with a hollow or the like allowing looping of the circuit.
  • US-A-5,043,683 describes a transition between a microstrip line and a waveguide intended to receive orthogonal polarizations.
  • the ground plane of two microstrip lines stop at the wall of the waveguide, while the ends of two microstrip lines cross the wall of the waveguide and are capacitively coupled at the end by a series spacing on the adjacent sides of a square patch in the waveguide.
  • the wall of the waveguide has a thickness of a quarter wavelength, so as to be transparent to the signals passing through it, and the refined ends of the micro-ribbon lines are close but distinct from the edges of the square patch.
  • This solution notably involves closing the waveguide with an active cover as a short circuit.
  • This document proposes a solution for a transition between two micro-ribbon lines and a circularly polarized waveguide, but does not offer no suggestion for a coplanar line or a classic waveguide.
  • the short circuit which closes the end of the waveguide acts as a plane of mass of the patch.
  • the invention proposes a transition between a coplanar line and a waveguide, which is simple to implement, and which in particular does not involve machining complex of mechanical parts and can be assembled easily.
  • the invention makes possible the use of a single substrate, and thus provides a costly solution reduced.
  • the invention proposes a transition between at least one line coplanar and a waveguide, the coplanar line comprising a line and a plane of mass arranged on one face of a substrate, characterized in that it comprises a patch arranged on the face of the substrate opposite the line, so as to be electro-magnetically coupled to the line, and in that is the patch is surrounded by the waveguide.
  • the waveguide has a circular section, square or rectangular.
  • the patch is square or circular.
  • the transition includes a second line on the same side of the substrate as said line, which extends perpendicular to said line.
  • the patch has a square shape, than the so-called line extends substantially opposite one side of the patch, and the second line extends substantially opposite an adjacent side of the patch.
  • the substrate is made of a gas and water tight material, such as ceramic, sapphire or quartz.
  • the invention also relates to a substrate having on one of its faces at minus a coplanar line with a line and a ground plane, and on its other face a patch electro-magnetically coupled with the line.
  • the patch is square or circular.
  • the substrate comprises a second line on the same face of the substrate as the said line, and which extends perpendicular to the said line.
  • the patch preferably has a square shape, the so-called line extends substantially opposite one side of the patch, and the second line extends substantially opposite an adjacent side of the patch.
  • the substrate is made of a gas and water tight material, such as ceramic, sapphire or quartz.
  • Figure 1 shows a schematic top view of a transition along the invention, between a coplanar line and a waveguide.
  • the line 1 surrounded by its ground plane 2.
  • the coplanar line 1 is electromagnetically coupled through the substrate 3 to a patch 5 arranged in wave guide 6; in the example of FIG. 1, the waveguide 6 presents a rectangular section. but this is in no way necessary for the implementation of the invention.
  • the waveguide could also have a circular or square section.
  • the patch is square; it could also be circular.
  • Figure 2 shows a sectional view of the transition from Figure 1, in the plane II-II of Figure 1; we recognize in Figure 2 the walls 7 and 8 of the waveguide 6; the ends of the walls of the waveguide are adjacent or fixed to the substrate 3, by conventional fixing means.
  • the patch On the underside of the substrate 3 facing the guide wave 6 is provided the patch; on the opposite side to the waveguide 6, we recognize the ground plane 2 and the coplanar line 1.
  • the operation of the device of Figures 1 and 2 is as follows.
  • the signal microwave transmitted on the coplanar line is electromagnetically coupled to the patch 5, through substrate 3.
  • Patch 5 acts as an antenna, and radiates the signal in the waveguide;
  • the patch's ground plan is made up of the ground plan of the coplanar line.
  • the coplanar line extends opposite one side of the patch. on the opposite side of the substrate, over about a quarter of the dimension of the patch in a longitudinal direction of the line; this is a value that turns out suitable, especially for the assembly of FIG. 3. It is however clear that the capacitive coupling between the patch and the coplanar line does not require this relative position of these two elements, and the line may not extend above the patch, or still cross it completely; the choice of the exact relative position of the patch and the line can be determined in each application by the skilled person, depending constraints encountered, for example with the help of known simulation software in itself.
  • the ground plane of the patch is formed of the plane of mass of the coplanar line.
  • the coupling between the coplanar line and the patch depends on the permittivity relative dielectric of the substrate; the bandwidth of the transition depends in this measurement of the nature of the substrate chosen. This is not a limiting factor in the measurement where the range of existing substrate makes it possible to find for the different values possible bandwidth a suitable value of the permittivity.
  • the invention of Figures 1 and 2 thus allows a simple and effective coupling of a coplanar line in a waveguide; this coupling is easy to manufacture, and easy assembly. It does not require any mechanical parts.
  • the transition is sealed or waterproof if the substrate does not allow the passage of gases or water, which is in particular the case for a ceramic, quartz or sapphire substrate.
  • Figure 3 shows a schematic view of another embodiment of a transition according to the invention.
  • the embodiment of the invention makes it possible to couple in a waveguide two orthogonal polarizations, thanks to two lines distinct perpendicular coplanar.
  • the device of Figure 3 is identical to that in FIG. 1, except that it has a second coplanar line 10, perpendicular to line 2, and which electromagnetically couples to patch 5 on one side of it adjacent to the side on which line 2 is coupled.
  • the waveguide of Figure 3 has a square section; he could also present a circular section.
  • lines 1, 10 carry signals which radiate in the waveguide with polarizations orthogonal in planes containing respectively the plane of each of the lines. This ensures coupling in the waveguide of orthogonal polarizations.
  • the present invention is not limited to the examples and methods of realization described and represented, but it is susceptible of numerous variants accessible to those skilled in the art.
  • the invention applies to all types of guides waves, and not only those shown in Figures 1, 2 and 3; so we can do vary the section of the waveguide and the shape and size of the patch depending on the constraints specific to each application of the invention, and in particular the frequency wanted.
  • the transition of the invention can be used to move from a propagation medium other than a coplanar line to a guide waves, via a coplanar line; we can thus pass classically from one line micro-ribbon to a coplanar line, then use the transition according to the invention to go through a waveguide.
  • Another material can be used for the substrate, for example example an organic substrate; in this case the transition is not necessarily hermetic.

Landscapes

  • Waveguide Aerials (AREA)
  • Waveguides (AREA)
EP98403062A 1997-12-08 1998-12-07 Übergang zwischen einem Hohlleiter und einer koplanaren Leitung Withdrawn EP0928041A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9715459A FR2772189B1 (fr) 1997-12-08 1997-12-08 Transition entre un guide d'ondes et une ligne coplanaire
FR9715459 1997-12-08

Publications (1)

Publication Number Publication Date
EP0928041A1 true EP0928041A1 (de) 1999-07-07

Family

ID=9514278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98403062A Withdrawn EP0928041A1 (de) 1997-12-08 1998-12-07 Übergang zwischen einem Hohlleiter und einer koplanaren Leitung

Country Status (3)

Country Link
EP (1) EP0928041A1 (de)
CA (1) CA2253765A1 (de)
FR (1) FR2772189B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010028345A (ja) * 2008-07-17 2010-02-04 Nippon Pillar Packing Co Ltd 導波管・ストリップ線路変換器及び高周波回路
WO2013114974A1 (ja) * 2012-02-03 2013-08-08 株式会社村田製作所 高周波信号伝送線路及び電子機器
GB2512982A (en) * 2012-02-03 2014-10-15 Murata Manufacturing Co High-frequency signal transmission line and electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04256201A (ja) * 1991-02-07 1992-09-10 Dx Antenna Co Ltd 円−直線偏波変換器
DE4329570A1 (de) * 1992-03-13 1995-03-09 Deutsche Aerospace Hohlleiter/Mikrostreifenleitungs-Übergang
JPH08139504A (ja) * 1994-11-14 1996-05-31 Nec Corp 導波管・平面線路変換器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04256201A (ja) * 1991-02-07 1992-09-10 Dx Antenna Co Ltd 円−直線偏波変換器
DE4329570A1 (de) * 1992-03-13 1995-03-09 Deutsche Aerospace Hohlleiter/Mikrostreifenleitungs-Übergang
JPH08139504A (ja) * 1994-11-14 1996-05-31 Nec Corp 導波管・平面線路変換器

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
MENZEL W ET AL: "A MICROSTRIP PATCH ANTENNA WITH COPLANAR FEED LINE", IEEE MICROWAVE AND GUIDED WAVE LETTERS, vol. 1, no. 11, 1 November 1991 (1991-11-01), pages 340 - 342, XP000230628 *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 35 (E - 1310) 22 January 1993 (1993-01-22) *
PATENT ABSTRACTS OF JAPAN vol. 96, no. 9 30 September 1996 (1996-09-30) *
RAHARDJO E T ET AL: "PLANAR ANTENNA EXCITED BY ELECTROMAGNETICALLY COUPLED COPLANAR WAVEGUIDE", ELECTRONICS LETTERS, vol. 29, no. 10, 13 May 1993 (1993-05-13), pages 870 - 872, XP000373518 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010028345A (ja) * 2008-07-17 2010-02-04 Nippon Pillar Packing Co Ltd 導波管・ストリップ線路変換器及び高周波回路
JP4712841B2 (ja) * 2008-07-17 2011-06-29 日本ピラー工業株式会社 導波管・ストリップ線路変換器及び高周波回路
WO2013114974A1 (ja) * 2012-02-03 2013-08-08 株式会社村田製作所 高周波信号伝送線路及び電子機器
GB2512982A (en) * 2012-02-03 2014-10-15 Murata Manufacturing Co High-frequency signal transmission line and electronic equipment
US9401531B2 (en) 2012-02-03 2016-07-26 Murata Manufacturing Co., Ltd. High-frequency signal transmission line and electronic device
GB2512982B (en) * 2012-02-03 2018-06-13 Murata Manufacturing Co High-frequency signal transmission line and electronic device

Also Published As

Publication number Publication date
FR2772189A1 (fr) 1999-06-11
FR2772189B1 (fr) 2000-01-21
CA2253765A1 (fr) 1999-06-08

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