EP0582637A1 - Transition ligne microruban/guide d'ondes. - Google Patents
Transition ligne microruban/guide d'ondes.Info
- Publication number
- EP0582637A1 EP0582637A1 EP92910228A EP92910228A EP0582637A1 EP 0582637 A1 EP0582637 A1 EP 0582637A1 EP 92910228 A EP92910228 A EP 92910228A EP 92910228 A EP92910228 A EP 92910228A EP 0582637 A1 EP0582637 A1 EP 0582637A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- cavity
- antenna
- conductor
- 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.)
- Granted
Links
- 230000007704 transition Effects 0.000 title claims abstract description 35
- 239000004020 conductor Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims description 12
- 239000003989 dielectric material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 208000037656 Respiratory Sounds Diseases 0.000 claims 1
- 206010037833 rales Diseases 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Definitions
- the present invention relates to a microru ⁇ ban / waveguide line transition, in particular between an antenna of the plate antenna type with mieroruban lines and a waveguide or a resonant cavity.
- a microstrip line laterally enters the waveguide and parallel to its end wall by a channel provided in its side wall.
- the position of this channel in the side wall is such that the microstrip line inside the waveguide acts as a probe which excites the main modes of propagation of the waveguide.
- Patent document DE-A-2 421 795 describes a transition in which the excitation element of the waveguide is an antenna.
- the antenna is supplied by a line which also enters there laterally in the waveguide.
- the planned transition is provided, inside a resonant cavity, with a loop of relatively small dimension compared to a quarter of the length of the wave guided in the guide waves.
- the supply of this loop can be done through a passage provided in the end wall of the waveguide.
- the object of the invention is to provide a transition such as those which have just been described but which do not have the drawbacks thereof.
- Another object of the invention is to provide a transition which is of a relatively simple technology to implement.
- a transition characterized in that an end wall of a waveguide or of a cavity with rectangular section is located in a plane parallel to the plane containing the radiating elements of the antenna and their feed lines, said transition comprising a conductor of which a first end is in galvanic contact with the main feed point of the antenna and which passes through the substrate of the antenna in the direction of its thickness and opens into the guide wave or cavity, through a hole in the end wall of said waveguide or said cavity, the second end of said conductor being in galvanic contact with a wide internal side wall of the waveguide, substantially in the middle transversely from it and at a distance from said end wall equal to about a quarter of the length of the wave guided in said waveguide or said cavity, the plane containing said conductor as substantially perpendicular to the wide side wall of said wave guide or cavity.
- the antenna substrate is covered on its rear face with a layer of metallic material forming, on the one hand, a ground plane for said antenna and, d on the other hand, the end wall of said waveguide or of said cavity, the conductor of the transition passing through said layer through a hole drilled in said layer and opening out inside the waveguide or of the cavity, the diameter of said hole and the diameter of said conductor being such that they make a coaxial connection whose characteristic impedance is predetermined.
- the antenna substrate is mounted on a sole, the two faces of which are respectively covered with two metal layers, the conductor passing through said sole through a hole, the first metallic layer in contact with the antenna substrate forming the ground plane of said antenna and the second metal layer forming the end wall of the waveguide or of the cavity.
- the hole in the sole has its metallized wall and is filled with a dielectric material, the diameter of the conductor and the diameter of the hole in the sole being such that the connection in said sole is of the coaxial type whose characteristic impedance is predetermined.
- the conductor opens into the waveguide substantially at the center of the end wall of said waveguide or of said cavity.
- the conductor opens into said waveguide or cavity at a point offset, relative to the center of the end wall, towards the internal side wall of the waveguide or cavity which is opposite to that which receives the second end of the conductor.
- the waveguide or the cavity consists of a metal base provided with a recess which crosses it right through and which is of the same section as that of the rest of the guide. waves or cavity, its height being about a quarter of the length of the wave guided in the waveguide or in the cavity, the second end of said conductor being pinched between said base and said waveguide or cavity.
- FIG. . 1 is a perspective view of an antenna, a waveguide and a transition according to the invention, each element being dissociated from each other but in relative position ready for mounting
- FIG. 2 is a sectional view along the median plane II / II of FIG. 1 of a transition according to the present invention
- FIG. 3 is an alternative embodiment of the transition shown in FIG. 2,
- FIG. 4 is a curve of the characteristic of the reflection coefficient of a transition according to the invention as a function of its operating frequency
- FIG. 5 is an alternative embodiment of the invention.
- a plate antenna 1 is seen comprising, on the upper face of a substrate 2, radiating elements 3 and their supply lines 4 of the microstrip line type. It is, for example, manufactured by the printed circuit technique.
- the substrate 2 can be, for example, made of a material of the polypropylene type.
- the antenna 1. is supplied at a point A located on a supply line 5.
- a sole 6 intended to receive, on its upper surface, the antenna 1. It is, for example, made of epoxy glass and has its two faces which are respectively covered with metal layers 7 and 8 brought to ground potential .
- the layer 7 of the upper face of the sole 6 constitutes a ground plane for the antenna 1 when the latter is mounted on the sole 2.
- the sole 6 is provided with a cylindrical hole 9, the internal wall of which is also metallized.
- a base 10 In contact with the layer 8 on the underside of the sole 6, a base 10 is provided, consisting of a parallelepiped metal block provided, at the centers of its two horizontal surfaces, with a recess 11 also parallelepiped and passing through it. part by part.
- the base 10 is mounted on the sole 6 so that the hole 9 opens into the volume generated by the recess 11 in the base 10.
- the base 10 is intended to receive a waveguide or a resonance cavity 12 and is part of it.
- the internal volume of the waveguide or of the cavity 12 is of the same section as that of the recess 11, that is to say rectangular.
- the face 12 ′ of the waveguide or of the cavity 12 which is in the plane of FIG. 2 is a side face of small width compared to the faces 12 "perpendicular to them and which are wide side faces of the waveguide.
- waveguide will be used to designate either a waveguide or a resonant cavity.
- FIG. 1 shows the antenna with its substrate 2 and a feed line 4, the sole 6 with its upper 7 and lower 8 metal layers and its metallized hole 9 as well as the base 10 and part of the guide d 'waves 12.
- the microstrip line / waveguide transition of the present invention is carried out by a metallic conductor 13 which has one end in galvanic contact with the feed line 4 of the antenna 1 at point A shown in FIG. 1 and the second end inside the waveguide 12, as will be seen later. It first crosses, in the direction of its thickness, the substrate 2 of the antenna 1 then, in the same direction passing through the hole 9, the sole 6.
- the hole 9 contains a dielectric material of the same kind as the material constituting the substrate 2. Note that the filling of the hole 9 in the sole 6 can be obtained by pressing a layer of polypropylene on the sole 6, said layer then serving as substrate 2 for the antenna.
- the diameter of the hole 9 in the sole 6 and the diameter of the conductor 13 are such that the connection between the antenna and the waveguide is of the coaxial type, the characteristic impedance of which is predetermined.
- This impedance is, for example, 50 Ohms. This makes it possible to prevent the antenna / waveguide transition from disturbing the operation of the antenna in the form of parasitic radiation originating from diffractions at point A of the antenna supply.
- the conductor 13 then opens into the volume generated by the emptying 11 of the base 10.
- the part of the metal layer 8 which is located inside the recess 11 of the base 10 constitutes an end wall 14 of the waveguide formed by the base 10 and the guide 12 itself. The conductor 13 therefore opens, inside this waveguide, through the wall 14, substantially in the center of the latter.
- the second end of the conductor 13 is in galvanic contact with the body of the base 10 substantially in the middle of the wide lower lateral edge 15 formed by the recess 11. It is pinched between the base 10 and the waveguide 12.
- the point of contact of the conductor 13 with the base 10 is approximately ⁇ / 4 from the layer 8 constituting the end wall 14 of the waveguide,> ⁇ being the length of the wave guided in the waveguide 12.
- the thickness of the base 10 is substantially equal to ⁇ 4.
- the end of the conductor 13 is in galvanic contact with a wide lateral face 12 "of the waveguide 12 and that the plane which contains it is perpendicular to this face 12".
- the conductor 13 is biased in the interior volume generated by the recess 11 in the base 10.
- it has the shape of an arc of a circle with the convexity turned towards the inside of the waveguide 12. It could also include a 90 ° bend.
- a screw 16 for adjusting the frequency of tuning of the waveguide 12 is provided substantially in the center of the side wall 17 of the recess 11 which is opposite to that which receives the conductor 13.
- the conductor 13 opens into the volume generated by the recess 11 of the base 10 slightly offset, in the median plane of the base 10, towards the wall lateral 17 of the recess 11 which is opposite to that which receives the end of the conductor 13.
- the height of the base 10 is 4 mm
- the width of the recess 11 of the base 10 corresponding to the width of the waveguide 12 and to the distance between the wall 17 and the wall which receives the end of the conductor 13 is 4.3 mm
- the diameter of the conductor 13 is 0.65 mm
- the diameter of the hole 9 in the sole 6 is 2.3 mm.
- Fig. 4 shows the curve of the reflection coefficient expressed in decibels as a function of the operating frequency obtained with an antenna 1 equipped with such a transition.
- the measuring device is connected in place of the waveguide 12.
- the bandwidth at -3 dB is very narrow and is between 23.4 GHz and 24.8 GHz, with a minimum of the reflection coefficient at 24.25 GHz.
- the bandwidth is around 5% of the operating frequency.
- FIG. 5 An alternative embodiment of a transition according to the invention is shown in FIG. 5.
- the substrate 2 of the antenna 1 has its underside which is covered with a metal layer 8 'which, on the one hand, forms the ground plane of the antenna 1 and, on the other hand, the wall end 14 'of the waveguide 12 and its base 10.
- the base 10 is directly mounted in galvanic contact with the layer 8'.
- the conductor 13 constituting the transition crosses the substrate 2 in the direction of its thickness and emerges, through a hole 9 'drilled in the layer 8', in the volume generated by the recess 11 of the base 10. With the walls of the hole 9 'in the layer 8', the conductor 14 forms a coaxial type connection of very small thickness, the characteristic impedance of which is predetermined.
- the end of the conductor 13 is mounted on the base 10 in the same manner as in the previous variants.
- a base 10 has been described on which a waveguide or a resonant cavity 12 is mounted. It will be understood that one could directly use a waveguide or a cavity with suitable means for placing the end of the conductor 13 in galvanic contact with the side wall of this waveguide 12 at a distance of the order of? ⁇ / A from the end wall g 14 'of this guide or this cavity 12.
Landscapes
- Waveguide Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9104773 | 1991-04-16 | ||
FR9104773A FR2675637B1 (fr) | 1991-04-16 | 1991-04-16 | Transition ligne microruban/guide d'ondes. |
PCT/FR1992/000335 WO1992019020A1 (fr) | 1991-04-16 | 1992-04-15 | Transition ligne microruban/guide d'ondes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0582637A1 true EP0582637A1 (fr) | 1994-02-16 |
EP0582637B1 EP0582637B1 (fr) | 1995-08-16 |
Family
ID=9411993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92910228A Expired - Lifetime EP0582637B1 (fr) | 1991-04-16 | 1992-04-15 | Transition ligne microruban/guide d'ondes |
Country Status (5)
Country | Link |
---|---|
US (1) | US5258727A (fr) |
EP (1) | EP0582637B1 (fr) |
DE (1) | DE69204160T2 (fr) |
FR (1) | FR2675637B1 (fr) |
WO (1) | WO1992019020A1 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9215707D0 (en) | 1992-07-23 | 1992-09-09 | Cambridge Computer | Rf waveguide signal transition apparatus |
FR2729011B1 (fr) * | 1994-12-28 | 1997-01-31 | Le Centre Thomson D Applic Rad | Antenne reseau a double polarisation et a faibles pertes |
BE1013508A3 (fr) * | 1997-05-12 | 2002-03-05 | Belgian Electronic Res S A En | Dispositif de transition entre un guide d'ondes et un element rayonnant. |
US6201453B1 (en) * | 1998-11-19 | 2001-03-13 | Trw Inc. | H-plane hermetic sealed waveguide probe |
DE19934351A1 (de) * | 1999-07-22 | 2001-02-08 | Bosch Gmbh Robert | Übergang von einem Hohlleiter auf eine Streifenleitung |
FR2869725A1 (fr) * | 2004-04-29 | 2005-11-04 | Thomson Licensing Sa | Element de transition sans contact entre un guide d'ondes et une ligne mocroruban |
US7170366B2 (en) * | 2005-02-11 | 2007-01-30 | Andrew Corporation | Waveguide to microstrip transition with a 90° bend probe for use in a circularly polarized feed |
WO2007123494A1 (fr) * | 2006-04-24 | 2007-11-01 | Agency For Science, Technology And Research | Antenne de reseau pour communication sans fil et procede |
FR2906938B1 (fr) * | 2006-10-06 | 2009-01-16 | Bouygues Telecom Sa | Dispositif de couplage fente/pastille ellipsoidale pour l'alimentation directe par guide d'ondes d'une antenne plate |
CN101478079B (zh) * | 2008-01-04 | 2012-10-10 | 华硕电脑股份有限公司 | 阵列天线以及使用其的电子装置 |
TWI389390B (zh) * | 2008-01-04 | 2013-03-11 | Asustek Comp Inc | 陣列天線以及使用其之電子裝置 |
US7786821B2 (en) * | 2008-06-02 | 2010-08-31 | Bsc Filters Ltd. | Compact end launch transition including a body with an antenna and an electrical connector |
JP2015002490A (ja) * | 2013-06-18 | 2015-01-05 | 日本無線株式会社 | 給電路 |
JP6318392B2 (ja) | 2013-06-18 | 2018-05-09 | 日本無線株式会社 | 2ポートトリプレート線路−導波管変換器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3483489A (en) * | 1968-01-31 | 1969-12-09 | Bell Telephone Labor Inc | End launch stripline-waveguide transducer |
US3942138A (en) * | 1974-02-04 | 1976-03-02 | The United States Of America As Represented By The Secretary Of The Air Force | Short depth hardened waveguide launcher assembly element |
JPS5275249A (en) * | 1975-12-19 | 1977-06-24 | Matsushita Electric Ind Co Ltd | Micro strip waveguide convertor |
DE3033674A1 (de) * | 1980-09-06 | 1982-03-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Resonatoranordnung |
SU1247979A1 (ru) * | 1984-12-30 | 1986-07-30 | Предприятие П/Я А-7306 | Коаксиально-волноводный переход |
JPS61264803A (ja) * | 1985-05-17 | 1986-11-22 | Fujitsu Ltd | 導波管mic変換回路 |
JPS62131605A (ja) * | 1985-12-03 | 1987-06-13 | Matsushita Electric Works Ltd | マイクロ波用平面アンテナ |
FR2622055B1 (fr) * | 1987-09-09 | 1990-04-13 | Bretagne Ctre Regl Innova Tran | Antenne plaque microonde, notamment pour radar doppler |
-
1991
- 1991-04-16 FR FR9104773A patent/FR2675637B1/fr not_active Expired - Lifetime
-
1992
- 1992-04-14 US US07/869,145 patent/US5258727A/en not_active Expired - Lifetime
- 1992-04-15 DE DE69204160T patent/DE69204160T2/de not_active Expired - Lifetime
- 1992-04-15 WO PCT/FR1992/000335 patent/WO1992019020A1/fr active IP Right Grant
- 1992-04-15 EP EP92910228A patent/EP0582637B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9219020A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2675637A1 (fr) | 1992-10-23 |
US5258727A (en) | 1993-11-02 |
DE69204160T2 (de) | 1996-01-04 |
EP0582637B1 (fr) | 1995-08-16 |
FR2675637B1 (fr) | 1993-07-09 |
DE69204160D1 (de) | 1995-09-21 |
WO1992019020A1 (fr) | 1992-10-29 |
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