EP0283396A1 - Übergang zwischen einer zweiseitig abgeschirmten Streifenleitung und einer Mikrostreifenleitung und dessen Anwendungen - Google Patents

Übergang zwischen einer zweiseitig abgeschirmten Streifenleitung und einer Mikrostreifenleitung und dessen Anwendungen Download PDF

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Publication number
EP0283396A1
EP0283396A1 EP88400604A EP88400604A EP0283396A1 EP 0283396 A1 EP0283396 A1 EP 0283396A1 EP 88400604 A EP88400604 A EP 88400604A EP 88400604 A EP88400604 A EP 88400604A EP 0283396 A1 EP0283396 A1 EP 0283396A1
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EP
European Patent Office
Prior art keywords
line
triplate
central conductor
microstrip line
microstrip
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Withdrawn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
EP88400604A
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English (en)
French (fr)
Inventor
Philippe Naudin
Yves Espinasse
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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0283396A1 publication Critical patent/EP0283396A1/de
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a junction between a triplate line and a microstrip line and its application in particular: - the electrical connection of two superimposed triplate lines; - the electrical connection of two perpendicular triplate lines; - the production of an energy distributor essentially comprising three-plate lines; - the production of an energy distributor comprising triplate lines and a microstrip line; - the creation of an electronic scanning antenna in the site plan; - the electrical connection of microstrip radiating elements to a triplate line.
  • Fiberd radars intended to remain on the ground may include bulky and heavy antennas.
  • the prior art includes such electrical connections.
  • the junction of two superposed triplate lines is made, according to the prior art, using a conductive wire located inside said triplate lines: this conductive wire electrically connects the central conductors of each of the two triplate lines, in particular crossing the ground plane common to the two triplate lines and located between said central conductors; electrical insulation means are provided between this conductive wire and the ground plane through which it passes.
  • a junction of this type has many drawbacks: - It requires intervention inside the triplate lines, which makes it complicated, therefore expensive; - It has significant losses, due to the radiation of said conductive wire; - It is bulky and heavy, in particular because of the shielding which it is necessary to provide to stop the radiation described in the preceding paragraph.
  • the object of the present invention is a junction between a triplate line and a microstrip line.
  • the central conductor of the triplate line has a protrusion outside of this triplate line; this protrusion crosses the ground plane and the dielectric of the microstrip line without electrical contact, then is electrically connected to the microstrip line conductor.
  • Such a junction has the following advantages: - it is performed outside the triplate line; - It has an "intrinsic" mechanical strength thanks to the crossing of the ground plane and the dielectric of the microstrip line by the protuberance of the central conductor of the triplate line; - it is compact and light; - it has few losses thanks to a good impedance matching; - it radiates little: shielding stopping the radiation from this junction is not essential; - its principle is simple, it is therefore inexpensive.
  • the invention more specifically relates to a junction between a triplate line and a microstrip line, the triplate line comprising a conductive strip, called the central conductor, and two conductive planes, called ground planes, the central conductor being kept at substantially constant distance from each of the two ground planes, the central conductor being separated from each of the two ground planes by a dielectric, the microstrip line comprising a metallic strip, called the conductor, and a metal plate, called the ground plane, substantially parallel to the conductor, and separated from the conductor by a dielectric, said junction being characterized in that the central conductor of the three-ply line has a protrusion outside this three-ply line, this protrusion being electrically connected to the conductor of the microstrip line, after crossing the ground plane and of the dielectric of the microstrip line, electrical insulation means being provided between the conductor central ur of the triplate line and the ground plane of the microstrip line.
  • FIG. 1 represents a cross section of an exemplary embodiment of a triplate line, composed of a conductive strip 1, kept at a substantially constant distance from two conducting planes 2 and 3 which behave like short circuits; the conductive strip 1, also called the central conductor of the three-ply line, is separated from each of the two planes 2 and 3, also called the ground planes of the three-ply line, by a dielectric 4.
  • the orientation of a three-ply line is identified in the following by its longitudinal axis, its transverse axis along its thickness, and its transverse axis along its width, respectively noted tL, tTE and tTL.
  • FIG. 2 represents a cross section of an exemplary embodiment of a microstrip line, composed of a metallic strip 5, also called conductor of the microstrip line, and of a metallic plate 6, behaving like a short circuit , also called ground plane of the microstrip line, the conductor 5 and the ground plane 6 of this microstrip line being substantially parallel and separated by a dielectric 7.
  • the orientation of a microstrip line m is identified in the following by its longitudinal axis, its transverse axis along its thickness, and its transverse axis along its width, respectively denoted mL, mTE, mTL.
  • FIG. 3 represents a perspective view of a first embodiment of a junction according to the invention between a triplate line and a microstrip line, these two microwave line elements being represented before their assembly.
  • This assembly is carried out along an axis D parallel to the axis tL of the triplate line, and to the axis mTE of the microstrip line.
  • Dielectric 4 of the three-ply line is not shown.
  • the central conductor 1 of the three-ply line has a protrusion 8 outside the three-ply line. The width a of this protuberance 8 is smaller than that A of the same central conductor 1 located inside said three-ply line.
  • a particular embodiment of this variation in width is obtained by cutting, for example in a bevel 9, which makes it possible to ensure a progressive variation in the width of said central conductor 1.
  • the protuberance 8 of said central conductor 1 is intended to pass through the ground plane 6 and the dielectric 7 of the microstrip line, then to be mechanically fixed on the one hand, and electrically connected on the other hand, to the conductor 5 of this microstrip line.
  • This mechanical strength and this electrical connection are made, for example, by means of a weld. This welding is done, for example, by wave by tinning.
  • the electrical insulation between the ground plane 6 of the microstrip line and the protuberance 8 of the central conductor 1 of the three-ply line is provided for example by means of: - a savings 10, for example circular, made in the ground plane 6 of the microstrip line; - the variation in width of the central conductor 1 of the three-ply line, produced for example by cutting, for example bevel 9.
  • One end of the conductor 5 of the microstrip line is connected to the rest of the electrical circuit.
  • the other end has a non-zero and finite length, noted b.
  • Figure 4 shows the same elements as those of Figure 3, no longer seen in perspective but seen from above. We see in particular the variation in width of the central conductor 1 of the triplate line.
  • FIG. 5 represents the same elements as those of FIG. 4 and those of FIG. 3, no longer seen in perspective or seen from above, but seen in profile. We see in particular the length b of the end of the conductor 5 of the microstrip line not connected to the rest of the electrical circuit.
  • FIG. 6 represents, in an embodiment, a microstrip line intended to be connected according to the invention to a triplate line.
  • This microstrip line is a view from the side of its ground plane 6. In this figure, is shown, in particular, the savings 10 practiced in this ground plane 6.
  • Figures 7 and 8 show, respectively in top view, and in profile view, the first embodiment of a junction according to the invention between a triplate line and a microstrip line, after the assembly of these two elements of microwave line.
  • the weld which was discussed above, is drawn and numbered 11 in these two figures 7 and 8.
  • the junction which is the subject of the present invention, illustrated by FIGS. 3 to 8, is produced without any intervention inside the triplate line, and has an "intrinsic" mechanical strength, thanks to the crossing of the ground plane 6 and of the dielectric 7 of the microstrip line by the projection 8 of the central conductor 1 of the triplate line; this allows it to be light and compact. Its principle is moreover, extremely simple, its realization is consequently inexpensive.
  • This junction can be used in the frequency band called L, corresponding to 1 GHz, and in the frequency band called S corresponding to 4 or 5 GHz.
  • this junction has little energy loss, whether it be radiation losses, or else losses due to poor impedance matching, i.e. at a wave rate. stationary (noted TOS) high.
  • Such a junction can be optimized by adjusting three parameters which are: - the length b, defined above, of the end of the conductor 5 of the microstrip line; - the shape and size of the savings 10, practiced in the ground plane 6 of the microstrip line; - The embodiment of the variation in width of the central conductor 1 of the triplate line, namely, for example the shape of the bevel 9 and its position relative to the edge of the triplate line.
  • FIGS. 9a and 9b show different embodiments of a triplate line, seen from above, intended to be connected according to the invention to a microstrip line. These two figures illustrate in particular two different positions of said bevel 9 relative to said edge of the triplate line.
  • the end of the bevel 9 is located inside the triplate line, and in FIG. 9b, the end of the bevel 9 is situated exactly at the edge of the triplate line.
  • the three parameters listed above are determined based on experimental measurements, in particular the TOS.
  • the three ground planes of the junction namely the two ground planes 2 and 3 of the triplate line and the ground plane 6 of the microstrip line, are in electrical contact with each other at the junction.
  • Such a junction optimized by the judicious choice of the three parameters mentioned above, radiates sufficiently little, so that shielding is not essential.
  • FIG. 10 corresponding to a second embodiment of a junction according to the invention, is the analog of FIG. 3, after a rotation of 90 ° of one of the microwave line elements with respect to the other .
  • the ground plane 6 of the microstrip line is preferably wider in FIG. 10 than in FIG. 3, this in order to ensure electrical contact between this ground plane 6 of the microstrip line and the two ground planes 2 and 3 of the triplate line, this electrical contact optimizing the performance of the junction, as has been explained previously.
  • FIG. 11 illustrates a mode of application of a junction according to the invention, to the electrical connection of two triplate lines 30 and 31 superimposed and oriented in an identical manner, by means of a microstrip line 32.
  • the triplate line 30 is electrically connected, by means of a junction 12, according to the embodiment of the invention illustrated by FIG. 3, to the microstrip line 32, itself electrically connected, by means of a junction 13, in the same mode for carrying out the invention, on the triple line 31.
  • FIG. 12 represents a mode of application of a junction according to the invention to the electrical connection of two triplate lines 33 and 34 perpendicular, and oriented so that their axes tTL (transverse along their width) are parallel.
  • the three-ply line 34 is electrically connected, by means of a junction 15, according to the embodiment of the invention illustrated by FIG. 10, to the microstrip line 35, itself electrically connected, by means of a junction 14 , according to the embodiment of the invention illustrated in FIG. 3, at the three-ply line 33.
  • FIGS. 11 and 12 the various elements of the microstrip lines and of the triplate lines are not shown.
  • FIG. 13 represents the application of a junction according to the invention, to the production of a candlestick energy distributor essentially comprising triplate lines.
  • the first branch of the candlestick consists of a triplate line 16; this single branch is divided for example into ten at the level of ten electrical connections 17-1, ..., 17-i, ..., 17-10, corresponding to the configuration illustrated by FIG.
  • each triplate line 18-i is part of a set i of two superposed triplate lines, denoted 18-i and 20-i; several, for example eight, electrical connections 19-i-1, ..., 19-ij, ..., 19-i-8, corresponding to the configuration illustrated in FIG. 11 connect the ends of the central conductor of the line triplate 18-i at other ends of the central conductor of the triplate line 20-i.
  • FIG. 14 represents the application of a junction according to the invention, to the production of a candlestick energy distributor comprising triplate lines and a microstrip line, in addition to the microstrip lines forming part of junctions according to the invention.
  • the first branch of the candlestick consists of a microstrip line 21, pressed against the slices of several, for example ten triplate lines 18-i and of several, for example ten triplate lines 20-i; this single branch is divided for example into ten at the level of ten junctions 22-1, ..., 22-i, ..., 22-10, according to the invention, corresponding to the configuration illustrated in FIG.
  • phase-shifters are introduced at the level of the ten electrical connections 17-i, that is to say between the vertical energy distribution and the horizontal energy distribution.
  • An antenna with electronic scanning in the site plane, the rotation in the plane of bearing taking place mechanically, can also be carried out from a candlestick energy distributor such as that described by FIG. 14, the phase shifters are then introduced at the level of the ten junctions 22-i.
  • FIG. 16 represents the application of a junction according to the invention, to the electrical connection of radiating microstrip elements, the diagram of which is given in FIG. 15, to a three-plate line 26, forming, for example, of a candlestick energy distributor such as that illustrated in FIG. 13, or else that illustrated in FIG. 14.
  • a microstrip radiating element as shown diagrammatically in FIG. 15, consists of a metal surface 23, called the pattern of the microstrip radiating element, and of a metal plate 24 substantially parallel to the pattern 23, behaving as a short circuit and called the ground plane of the microstrip radiating element, the pattern 23 and the ground plane 24 being separated by a dielectric 25.
  • the pattern 23 can, in principle, have any shape; nevertheless, in practice, it has a simple geometric shape: it forms for example, an equilateral triangle, a hexagon, a square, ...
  • Such radiating elements microstrips are part of the state of the art and are described, for example , in the book "Microstrip Antennas" by IS Bahl and P. Bhartia.
  • the microstrip radiating elements shown in FIG. 16 include patterns 23, for example triangular, deposited on a common dielectric 25 separating them from a common ground plane 24. Each pattern 23 is electrically connected to one end of the central conductor of a triplate line 26, by means of a junction according to the invention. In this figure 16, the different elements of the three-ply line 26 are not shown.

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  • Waveguides (AREA)
  • Waveguide Connection Structure (AREA)
EP88400604A 1987-03-20 1988-03-15 Übergang zwischen einer zweiseitig abgeschirmten Streifenleitung und einer Mikrostreifenleitung und dessen Anwendungen Withdrawn EP0283396A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703917 1987-03-20
FR8703917A FR2612697B1 (fr) 1987-03-20 1987-03-20 Jonction entre une ligne triplaque et une ligne microruban et applications

Publications (1)

Publication Number Publication Date
EP0283396A1 true EP0283396A1 (de) 1988-09-21

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EP88400604A Withdrawn EP0283396A1 (de) 1987-03-20 1988-03-15 Übergang zwischen einer zweiseitig abgeschirmten Streifenleitung und einer Mikrostreifenleitung und dessen Anwendungen

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EP (1) EP0283396A1 (de)
JP (1) JPS63254802A (de)
FR (1) FR2612697B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012547A1 (en) * 1991-01-04 1992-07-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Microwave connector
EP0551556A1 (de) * 1992-01-15 1993-07-21 Communications Satellite Corporation Verlustarmer, breitbandiger Übergang zwischen einer Streifen- und einer Mikrostreifenleitung
US7486234B2 (en) 2003-03-06 2009-02-03 Qinetiq Limited Microwave connector, antenna and method of manufacture of same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816253A (en) * 1953-12-23 1957-12-10 Sanders Associates Inc Electronic module structure
US2825875A (en) * 1953-07-22 1958-03-04 Itt Radio frequency transducer
US3218585A (en) * 1964-03-10 1965-11-16 Charles B May Stripline board connector
US3303439A (en) * 1965-06-14 1967-02-07 Western Electric Co Strip transmission line interboard connection
EP0198698A2 (de) * 1985-04-13 1986-10-22 Fujitsu Limited Integrierte Schaltung mit eingebauter Streifenleiterstruktur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825875A (en) * 1953-07-22 1958-03-04 Itt Radio frequency transducer
US2816253A (en) * 1953-12-23 1957-12-10 Sanders Associates Inc Electronic module structure
US3218585A (en) * 1964-03-10 1965-11-16 Charles B May Stripline board connector
US3303439A (en) * 1965-06-14 1967-02-07 Western Electric Co Strip transmission line interboard connection
EP0198698A2 (de) * 1985-04-13 1986-10-22 Fujitsu Limited Integrierte Schaltung mit eingebauter Streifenleiterstruktur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. MTT-9, no. 3, mai 1961, pages 273-274, New York, US; R. LEVY: "New coaxial-to-stripline transformers using rectangular lines" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012547A1 (en) * 1991-01-04 1992-07-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Microwave connector
US5369380A (en) * 1991-01-04 1994-11-29 The Secretary Of State Of Defence In Her Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Of Defence Research Agency Microwave connector
EP0551556A1 (de) * 1992-01-15 1993-07-21 Communications Satellite Corporation Verlustarmer, breitbandiger Übergang zwischen einer Streifen- und einer Mikrostreifenleitung
US7486234B2 (en) 2003-03-06 2009-02-03 Qinetiq Limited Microwave connector, antenna and method of manufacture of same

Also Published As

Publication number Publication date
JPS63254802A (ja) 1988-10-21
FR2612697B1 (fr) 1989-06-16
FR2612697A1 (fr) 1988-09-23

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