EP0746880A1 - Microwave antennas - Google Patents
Microwave antennasInfo
- Publication number
- EP0746880A1 EP0746880A1 EP95909057A EP95909057A EP0746880A1 EP 0746880 A1 EP0746880 A1 EP 0746880A1 EP 95909057 A EP95909057 A EP 95909057A EP 95909057 A EP95909057 A EP 95909057A EP 0746880 A1 EP0746880 A1 EP 0746880A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- planar members
- antenna
- membrane
- thickness
- waveguide
- 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
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
Definitions
- This invention relates to antennas, particularly (but not exclusively) planar antennas for receiving microwave signals such as direct broadcasting by satellite (DBS) signals.
- DBS satellite
- planar antennas comprising an array of horns communicating with one or more waveguide systems, and in which the horns and waveguides are formed from a sandwich of moulded planar members.
- the planar members may be plastics mouldings with electrically conductive surfaces formed by metallisation. See for example my published International Patent Applications WO89/09501 and WO91/20109.
- the present invention provides an antenna comprising a plurality of generally planar members secured together in face-to-face relationship to form an array of cavities and a waveguide system, each cavity being in communication with at least one waveguide channel, each of the planar members having a given overall thickness transverse to its principal plane, said thickness being constituted by a membrane of relatively small thickness formed three- dimensionally in a generally corrugated fashion.
- each of the planar members is a vacuum forming.
- each of the planar members is formed by vacuum forming a plastics material and thereafter metallising at least one side of the vacuum formed material.
- the present invention provides a method of manufacturing an antenna, comprising forming a plurality of generally planar members, each of the planar members having a given overall thickness transverse to its principal plane, said thickness being constituted by a membrane of relatively small thickness formed three-dimensionally in a generally corrugated fashion, positioning the planar members in face-to-face relationship to form an array of cavities and a waveguide system, each cavity being in communication with at least one waveguide channel, and securing the planar members together.
- planar members are secured together by ultrasonic welding; for this purpose the mating faces of the planar members may be provided with ribs or the like which fuse to form weld beads during the ultrasonic welding.
- Fig. 1 is an isometric view, sectioned along a transverse plane, of an antenna element according to the present invention
- Fig. 2 shows part of Fig. 1 in greater detail, to an enlarged scale
- Fig. 3 illustrates a preferred means used in securing together parts of the assembly of Figs. and 2
- Fig. 4 is a plan view illustrating the construction of a modified form of waveguide channel
- Fig. 5 is an enlarged cross-sectional scrap view on the line 5-5 of Fig. 4.
- an antenna element generally designated at 10 is in the form of a 4x4 array of receiving horns 12.
- the element 10 would be assembled with like elements to provide a larger array as a single antenna.
- the antenna element 10 comprises five generally planar members 14 - 22.
- the first planar member 14 is formed to provide the horns 12, each of which is of tapering square section, terminating in a lower wall 24 and circular aperture 26.
- the second and third planar members 16, 18 together define cylindrical cavities 28 aligned with the circular apertures 26, and first closed, rectangular section channels 30 extending along the length of the antenna element 10.
- the cavities 28 terminate in a plane partial end wall 32 defining a D-shaped slot 34.
- the fourth and fifth planar members 20, 22 together define bottom sections 36 to the horn cavities, and second closed, rectangular section passages 38.
- Each bottom section 36 has an upper part 39 corresponding to the D-shaped slots 34, and a lower part 40 forming an open-topped channel communicating with one of the second passages 38.
- the first channels 30 communicate with the cavities 26 by means of passageways 40 as indicated in Fig. 2.
- Each of the planar members 14 - 22 is separately formed by vacuum forming of a suitable plastics material. Techniques of and materials for vacuum forming are well known per se and will not therefore be described in detail herein.
- the walls of the horns, cavities and channels have the effect of providing a corrugated formation to each member, thus giving a reasonable degree of rigidity which is increased when the five members are secured together.
- each member After vacuum forming, one side, as appropriate, of each member is metallised in any suitable fashion, and thus when the members are secured together the surfaces of the horns, cavities and channels which are adjacent the received microwave radiation are conductive metallised surfaces.
- the channels 30 and 38 thus act as waveguides for differently polarised microwave signals separated by the conformation of the cavities 26, as is known per se.
- the five members may be secured together in any suitable manner.
- they may be secured together by adhesive.
- the mating faces such as the lower face 50 of the first member 14 and the upper face 52 of the second member 16, are provided with ribs 54 which fuse to form continuous welded beads during ultrasonic welding.
- FIGs. 4 and 5 there is illustrated an alternative construction of a moulded element 60 which partially defines the wave guides, for example in substitution for the element 22 in the above embodiment.
- Fig. 4 shows a 12 x 12 array, but it will be understood that the arrangement can be applied to any desired size of array.
- the element 60 is once again a vacuum forming in which a single membrane of material is formed to provide upper faces 62 and lower faces 64 joined by side webs 65 to define waveguide channels 66.
- the upper faces 62 are defined only as flanges in the vicinity of the waveguide channels 66, and elsewhere the material is cut away to form void spaces 68.
- This configuration is particularly efficient and results in a weight reduction of approximately 30%.
- the particular design minimises the extent of area which requires to be metallised.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9403752A GB9403752D0 (en) | 1994-02-26 | 1994-02-26 | Microwave antennas |
GB9403752 | 1994-02-26 | ||
GB9409692 | 1994-05-14 | ||
GB9409692A GB9409692D0 (en) | 1994-05-14 | 1994-05-14 | Microwave antennas |
PCT/GB1995/000398 WO1995023440A1 (en) | 1994-02-26 | 1995-02-24 | Microwave antennas |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0746880A1 true EP0746880A1 (en) | 1996-12-11 |
EP0746880B1 EP0746880B1 (en) | 2001-06-27 |
Family
ID=26304396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95909057A Expired - Lifetime EP0746880B1 (en) | 1994-02-26 | 1995-02-24 | Microwave antennas |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0746880B1 (en) |
JP (1) | JPH10500261A (en) |
KR (1) | KR100342111B1 (en) |
CN (1) | CN1075253C (en) |
AT (1) | ATE202658T1 (en) |
AU (1) | AU1715595A (en) |
CA (1) | CA2184080A1 (en) |
DE (1) | DE69521497T2 (en) |
DK (1) | DK0746880T3 (en) |
ES (1) | ES2160698T3 (en) |
GR (1) | GR3036740T3 (en) |
PT (1) | PT746880E (en) |
WO (1) | WO1995023440A1 (en) |
Families Citing this family (139)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9703748D0 (en) * | 1997-02-22 | 1997-04-09 | Fortel International Limited | Microwave antennas |
US6034647A (en) * | 1998-01-13 | 2000-03-07 | Raytheon Company | Boxhorn array architecture using folded junctions |
DE60214755T2 (en) * | 2001-11-26 | 2007-10-04 | Vega Grieshaber Kg | Horn antenna for a level measuring device |
US7109939B2 (en) | 2002-05-14 | 2006-09-19 | Hrl Laboratories, Llc | Wideband antenna array |
WO2008069358A1 (en) * | 2006-12-08 | 2008-06-12 | Idoit Co., Ltd. | Horn array type antenna for dual linear polarization |
WO2008102987A1 (en) * | 2007-02-21 | 2008-08-28 | Idoit Co., Ltd. | Horn array type antenna for dual linear polarization |
KR20080105856A (en) * | 2007-06-01 | 2008-12-04 | 주식회사 아이두잇 | Horn array type antenna for dual linear polarization |
KR101546777B1 (en) * | 2007-09-03 | 2015-08-25 | 주식회사 아이두잇 | Dual linear polarization horn array type antenna using skew filter |
KR20090024039A (en) | 2007-09-03 | 2009-03-06 | 주식회사 아이두잇 | Horn array type antenna for dual linear polarization |
WO2009031794A1 (en) * | 2007-09-03 | 2009-03-12 | Idoit Co., Ltd. | Horn array type antenna for dual linear polarization |
WO2009078630A1 (en) * | 2007-12-14 | 2009-06-25 | Idoit Co., Ltd. | Horn array type antenna with skew filter |
WO2009093779A1 (en) | 2008-01-25 | 2009-07-30 | Microface Co., Ltd | Feeding network structure for flat type antenna |
KR101536341B1 (en) * | 2008-12-05 | 2015-07-15 | 주식회사 아이두잇 | Adapter for antenna |
KR101405294B1 (en) * | 2011-06-09 | 2014-06-11 | 위월드 주식회사 | Ultra wideband dual linear polarization waveguide antenna for communication |
CN103022719A (en) * | 2012-12-26 | 2013-04-03 | 浙江大学 | Vehicle-borne STOM (satcom on the move) array antenna with gain increased by lightweight dielectric lens |
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FR2523376A1 (en) * | 1982-03-12 | 1983-09-16 | Labo Electronique Physique | RADIATION ELEMENT OR HYPERFREQUENCY SIGNAL RECEIVER WITH LEFT AND RIGHT CIRCULAR POLARIZATIONS AND FLAT ANTENNA COMPRISING A NETWORK OF SUCH JUXTAPOSED ELEMENTS |
CA2085131A1 (en) * | 1990-06-14 | 1991-12-15 | John L. F. C. Collins | Microwave antennas |
GB2247990A (en) * | 1990-08-09 | 1992-03-18 | British Satellite Broadcasting | Antennas and method of manufacturing thereof |
-
1995
- 1995-02-24 PT PT95909057T patent/PT746880E/en unknown
- 1995-02-24 DK DK95909057T patent/DK0746880T3/en active
- 1995-02-24 KR KR1019960704676A patent/KR100342111B1/en not_active IP Right Cessation
- 1995-02-24 AU AU17155/95A patent/AU1715595A/en not_active Abandoned
- 1995-02-24 EP EP95909057A patent/EP0746880B1/en not_active Expired - Lifetime
- 1995-02-24 WO PCT/GB1995/000398 patent/WO1995023440A1/en active IP Right Grant
- 1995-02-24 JP JP7522212A patent/JPH10500261A/en not_active Ceased
- 1995-02-24 ES ES95909057T patent/ES2160698T3/en not_active Expired - Lifetime
- 1995-02-24 AT AT95909057T patent/ATE202658T1/en not_active IP Right Cessation
- 1995-02-24 CA CA002184080A patent/CA2184080A1/en not_active Abandoned
- 1995-02-24 CN CN95191809A patent/CN1075253C/en not_active Expired - Fee Related
- 1995-02-24 DE DE69521497T patent/DE69521497T2/en not_active Expired - Fee Related
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2001
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See references of WO9523440A1 * |
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AU1715595A (en) | 1995-09-11 |
JPH10500261A (en) | 1998-01-06 |
DK0746880T3 (en) | 2002-01-07 |
EP0746880B1 (en) | 2001-06-27 |
WO1995023440A1 (en) | 1995-08-31 |
DE69521497T2 (en) | 2002-05-29 |
CA2184080A1 (en) | 1995-08-31 |
ES2160698T3 (en) | 2001-11-16 |
GR3036740T3 (en) | 2001-12-31 |
CN1075253C (en) | 2001-11-21 |
PT746880E (en) | 2001-12-28 |
CN1144019A (en) | 1997-02-26 |
KR970701435A (en) | 1997-03-17 |
KR100342111B1 (en) | 2002-11-13 |
ATE202658T1 (en) | 2001-07-15 |
DE69521497D1 (en) | 2001-08-02 |
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