CA2056157A1 - Slotted waveguide-type antenna mounted on a wall - Google Patents
Slotted waveguide-type antenna mounted on a wallInfo
- Publication number
- CA2056157A1 CA2056157A1 CA 2056157 CA2056157A CA2056157A1 CA 2056157 A1 CA2056157 A1 CA 2056157A1 CA 2056157 CA2056157 CA 2056157 CA 2056157 A CA2056157 A CA 2056157A CA 2056157 A1 CA2056157 A1 CA 2056157A1
- Authority
- CA
- Canada
- Prior art keywords
- wall
- waveguide
- antenna
- groove
- plate
- 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.)
- Abandoned
Links
- 238000010276 construction Methods 0.000 abstract description 3
- 239000003989 dielectric material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/286—Adaptation for use in or on aircraft, missiles, satellites, or balloons substantially flush mounted with the skin of the craft
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/40—Radiating elements coated with or embedded in protective material
-
- 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
- H01Q13/10—Resonant slot antennas
- H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Slotted waveguide-type antenna mounted on a wall The invention concerns microwave antennas constituted by a slotted waveguide and mounted on a wall.
The wall in question includes a groove which forms three of the sides of the waveguide; the fourth side of the waveguide is formed by a metallic conducting sheet with slots made in it and the sheet is fixed above the groove.
The invention is applicable, in particular, to the construction of antennas on the body of an aircraft.
Slotted waveguide-type antenna mounted on a wall The invention concerns microwave antennas constituted by a slotted waveguide and mounted on a wall.
The wall in question includes a groove which forms three of the sides of the waveguide; the fourth side of the waveguide is formed by a metallic conducting sheet with slots made in it and the sheet is fixed above the groove.
The invention is applicable, in particular, to the construction of antennas on the body of an aircraft.
Description
2~61~7 SLOTTED WAVEGUIDE-TYPE ANTENNA MOUNTED ON A WALL
BACKGROUND OF THE INVENTION
The present invention concerns microwave antennas of the slotted waveguide type, that is to say antennas comprising a waveguide with one or more radiating slots in lts wall. The invention particularly concerns these antennas when they are mounted against a wall such as a building wall or the body of a vehicle.
Known antennas of this type are produced from rectangular or circular waveguides ar.d the slot(s) are generally obtained by milling. Antennas made in this way have a fixture used to secure them to the wall where they must be mounted, and, usually, a radome formed by a thin layer of dielectric which covers at least the slot(s).
These known antennas, to facilitate their mounting on a wall, require the wall to be adapted beforehand, so that for example the waveguide antenna may be fixed using screws; they then require the radome to be mounted on the guide and the guide on the wall. Moreover, in the case where the antenna must not protrude from the wall, for example for reasons of aerodynamics, the construction of the guide with its fi~ings becomes more difficult because it can no longer be a standard assembly but must be specially adapted to the wall and, conversely, the wall must be specially designed with respect to the waveguide.
SUMMARY OF THE INVENTION
The purpose of the present invention is to simplify the construction of these slot antennas. This is obtained by making a groove in the wall and covering this groove with a conducting plate with slots cut into it in such a way that the assembly thus formed constitutes the desired slotted waveguide.
~. :
2~6~ 57 According to the present invention there lS provided an antenna coupled to a wall and comprising a waveguide with n slots, where n is an integer greater than 0, the said waveguide having an internal space, and the said antenna including a groove formed ln the wall and a conducting plate in which the waveguide slots are made and the said plate covering the groove so as to define a space between the plate and the groove, this lastmentioned space forming the internal space of the wave~uide.
~RIEF DESCRIPTION OF THE DRAWING
The present invention will be better understood and other characteristics will become evident with the aid of the following description and the appended figures which represent:
- figure 1, a cross section of an antenna according to the known art, - figure 2, a cross section of an antenna according to the invention.
In the figures, the corresponding parts are indicated by the same references.
MORE DETAILED ~SCRIPTION
Figure 1 represents, in cross section, that is to say perpendicular to the largest dimension of the waveguide, an antenna of the waveyuide type according to the known art.
This antenna is mounted on a wall 1 specially designed to accommodate it; in the case of the e~ample described, the wall is paxt of an aircra~t body. This wall 1, which, without the antenna, would have been a lightly curved wall having no sharp variations of curvature, here has a flat surface in the middle of a curved surface and this flat surface has an oblong hole in which is partially inserted a metallic profile 7 which constitutes a rectangular waveguide having two sorts of winys, 7a and 7b, on its short sides. The waveguide has its two long edges parallel , ,. ~: , .: .
. .
:. . , ,:
, 2 ~
to the flat surface of the wall 1 and located OIl either side of that flat surface, and the long surface on the outside of the body has some slots 4 made in i-t. A
dielectric plate 6 is fixed, outside the waveguide, on the long surface with slots, to act as a radome. The wings 7a and 7b have holes in them in which are inserted screws such as 8a and 8b, which are used to screw the profile 7 on the wall 1 on the flat part of this wall Figure 2 represents, in cross section, that is to say perpendicular to the largest dimension of the waveguide, an antenna of the waveguide type according to the invention.
This antenna is mounted on the same type of aircraft and in the same place on the body as the antenna shown in figure 1; but here the wall at the point of attachment of the antenna is designed differently. The wall 1 no longer has an oblong hole but a longitudinal groove, 2, ~ith vertical sides and a flat bottom, where the tops of the sides have two respective recesses 2a and 2b, on which stands a panel 3 compris1ng a printed circuit; this printed circuit includes a support made of dielectric material 6 on which a conducting metallic layer 5 is deposited, except ln certain places, so that the slots 4 can thus be defined in the metallic layer. The printed circuit 3 is stuck, using a conducting adhesive, on the recesses 2a and 2b, with its dielectric side facing away from the groove 2 and therefore away from the aircraft.
Made in this way, the antenna according to figure 2 is indeed, like the antenna according to figure 1, an antenna of the slotted waveguide type, where the cavity inside the waveguide is defined by the space between the groove and the panel 3 which covers the groove, that is to say the printed circuit. As in the case of figure 1, the antenna is protected by a radome formed here by the dielectric material support 6 of the printed circuit.
The invention is not limited to the example described here. The panel 3, instead o~ being a printed circuit, may, for example, include a metallic conducting plate with slots cut into it and another plate made of dielectric ., . ,., : ,., .:
:. . ~ : :: , :
2 ~
material, -these two plates being stuck together and designed to be sufficiently rigid. It is even possible, in the case where a radome is not essential, to close the groove using only a simple metallic conducting plate with S slots.
In the example described the waveguide is a rectangular guide but the invention may also be applied to antennas where the waveguide has a different profile and particularly to circular waveguides and to waveguides of longitudinally variable cross section.
Furthermore, the number o slots in the antenna has not been specified because the number of slots is not important for the embodiment of an antenna according to the invention and, as in the known techniques, antennas may be made with one or several slots.
.
. .
- .
- , - . .
- ~ . : .
: .
BACKGROUND OF THE INVENTION
The present invention concerns microwave antennas of the slotted waveguide type, that is to say antennas comprising a waveguide with one or more radiating slots in lts wall. The invention particularly concerns these antennas when they are mounted against a wall such as a building wall or the body of a vehicle.
Known antennas of this type are produced from rectangular or circular waveguides ar.d the slot(s) are generally obtained by milling. Antennas made in this way have a fixture used to secure them to the wall where they must be mounted, and, usually, a radome formed by a thin layer of dielectric which covers at least the slot(s).
These known antennas, to facilitate their mounting on a wall, require the wall to be adapted beforehand, so that for example the waveguide antenna may be fixed using screws; they then require the radome to be mounted on the guide and the guide on the wall. Moreover, in the case where the antenna must not protrude from the wall, for example for reasons of aerodynamics, the construction of the guide with its fi~ings becomes more difficult because it can no longer be a standard assembly but must be specially adapted to the wall and, conversely, the wall must be specially designed with respect to the waveguide.
SUMMARY OF THE INVENTION
The purpose of the present invention is to simplify the construction of these slot antennas. This is obtained by making a groove in the wall and covering this groove with a conducting plate with slots cut into it in such a way that the assembly thus formed constitutes the desired slotted waveguide.
~. :
2~6~ 57 According to the present invention there lS provided an antenna coupled to a wall and comprising a waveguide with n slots, where n is an integer greater than 0, the said waveguide having an internal space, and the said antenna including a groove formed ln the wall and a conducting plate in which the waveguide slots are made and the said plate covering the groove so as to define a space between the plate and the groove, this lastmentioned space forming the internal space of the wave~uide.
~RIEF DESCRIPTION OF THE DRAWING
The present invention will be better understood and other characteristics will become evident with the aid of the following description and the appended figures which represent:
- figure 1, a cross section of an antenna according to the known art, - figure 2, a cross section of an antenna according to the invention.
In the figures, the corresponding parts are indicated by the same references.
MORE DETAILED ~SCRIPTION
Figure 1 represents, in cross section, that is to say perpendicular to the largest dimension of the waveguide, an antenna of the waveyuide type according to the known art.
This antenna is mounted on a wall 1 specially designed to accommodate it; in the case of the e~ample described, the wall is paxt of an aircra~t body. This wall 1, which, without the antenna, would have been a lightly curved wall having no sharp variations of curvature, here has a flat surface in the middle of a curved surface and this flat surface has an oblong hole in which is partially inserted a metallic profile 7 which constitutes a rectangular waveguide having two sorts of winys, 7a and 7b, on its short sides. The waveguide has its two long edges parallel , ,. ~: , .: .
. .
:. . , ,:
, 2 ~
to the flat surface of the wall 1 and located OIl either side of that flat surface, and the long surface on the outside of the body has some slots 4 made in i-t. A
dielectric plate 6 is fixed, outside the waveguide, on the long surface with slots, to act as a radome. The wings 7a and 7b have holes in them in which are inserted screws such as 8a and 8b, which are used to screw the profile 7 on the wall 1 on the flat part of this wall Figure 2 represents, in cross section, that is to say perpendicular to the largest dimension of the waveguide, an antenna of the waveguide type according to the invention.
This antenna is mounted on the same type of aircraft and in the same place on the body as the antenna shown in figure 1; but here the wall at the point of attachment of the antenna is designed differently. The wall 1 no longer has an oblong hole but a longitudinal groove, 2, ~ith vertical sides and a flat bottom, where the tops of the sides have two respective recesses 2a and 2b, on which stands a panel 3 compris1ng a printed circuit; this printed circuit includes a support made of dielectric material 6 on which a conducting metallic layer 5 is deposited, except ln certain places, so that the slots 4 can thus be defined in the metallic layer. The printed circuit 3 is stuck, using a conducting adhesive, on the recesses 2a and 2b, with its dielectric side facing away from the groove 2 and therefore away from the aircraft.
Made in this way, the antenna according to figure 2 is indeed, like the antenna according to figure 1, an antenna of the slotted waveguide type, where the cavity inside the waveguide is defined by the space between the groove and the panel 3 which covers the groove, that is to say the printed circuit. As in the case of figure 1, the antenna is protected by a radome formed here by the dielectric material support 6 of the printed circuit.
The invention is not limited to the example described here. The panel 3, instead o~ being a printed circuit, may, for example, include a metallic conducting plate with slots cut into it and another plate made of dielectric ., . ,., : ,., .:
:. . ~ : :: , :
2 ~
material, -these two plates being stuck together and designed to be sufficiently rigid. It is even possible, in the case where a radome is not essential, to close the groove using only a simple metallic conducting plate with S slots.
In the example described the waveguide is a rectangular guide but the invention may also be applied to antennas where the waveguide has a different profile and particularly to circular waveguides and to waveguides of longitudinally variable cross section.
Furthermore, the number o slots in the antenna has not been specified because the number of slots is not important for the embodiment of an antenna according to the invention and, as in the known techniques, antennas may be made with one or several slots.
.
. .
- .
- , - . .
- ~ . : .
: .
Claims (4)
1. An antenna coupled to a wall and comprising a waveguide with n slots, where n is an integer greater than 0, the said waveguide having an internal space, and the said antenna including a groove formed in the wall and a conducting plate in which the waveguide slots are made and the said plate covering the groove so as to define a space between the plate and the groove, this lastmentioned space forming the internal space of the waveguide.
2. An antenna according to claim 1, including an insulating plate stuck to the conducting plate.
3. An antenna according to claim 2, wherein the insulating plate and the groove are on either side of the conducting plate and wherein the insulating plate thus constitutes a radome for the antenna.
4. An antenna according to claim 2, wherein the conducting plate and the insulating plate are formed by a metallized face and a printed circuit support respectively.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9014782 | 1990-11-27 | ||
FR9014782A FR2669777B1 (en) | 1990-11-27 | 1990-11-27 | ANTENNA OF THE SLOT WAVE GUIDE TYPE ASSOCIATED WITH A WALL. |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2056157A1 true CA2056157A1 (en) | 1992-05-28 |
Family
ID=9402613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2056157 Abandoned CA2056157A1 (en) | 1990-11-27 | 1991-11-25 | Slotted waveguide-type antenna mounted on a wall |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0489612A1 (en) |
JP (1) | JPH04273702A (en) |
CA (1) | CA2056157A1 (en) |
FR (1) | FR2669777B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2274206B (en) * | 1993-01-09 | 1996-08-07 | Ferranti Int Plc | Wide-band circularly-polarised antenna |
US6047925A (en) * | 1993-07-01 | 2000-04-11 | The Boeing Company | Nose gear door integral composite glide slope antenna |
RU2133530C1 (en) * | 1998-01-20 | 1999-07-20 | Научно-производственное предприятие "Полет" | Non-protruding ring slot antenna |
JP4369194B2 (en) * | 2003-09-30 | 2009-11-18 | Hoya株式会社 | Plastic lens and manufacturing method thereof |
JP5023032B2 (en) * | 2008-09-25 | 2012-09-12 | 株式会社東芝 | Planar antenna device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3713167A (en) * | 1971-08-05 | 1973-01-23 | Us Navy | Omni-steerable cardioid antenna |
JPS58111503A (en) * | 1981-12-25 | 1983-07-02 | Nissan Motor Co Ltd | Flying object tower-mounted transmission line type antenna device |
US4682180A (en) * | 1985-09-23 | 1987-07-21 | American Telephone And Telegraph Company At&T Bell Laboratories | Multidirectional feed and flush-mounted surface wave antenna |
US4733245A (en) * | 1986-06-23 | 1988-03-22 | Ball Corporation | Cavity-backed slot antenna |
US4791429A (en) * | 1987-05-11 | 1988-12-13 | Hazeltine Corporation | Multimode omniantenna with flush mount |
-
1990
- 1990-11-27 FR FR9014782A patent/FR2669777B1/en not_active Expired - Fee Related
-
1991
- 1991-11-19 EP EP91403103A patent/EP0489612A1/en not_active Withdrawn
- 1991-11-25 CA CA 2056157 patent/CA2056157A1/en not_active Abandoned
- 1991-11-26 JP JP31100991A patent/JPH04273702A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2669777A1 (en) | 1992-05-29 |
FR2669777B1 (en) | 1993-04-23 |
JPH04273702A (en) | 1992-09-29 |
EP0489612A1 (en) | 1992-06-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Dead |