EP0445453A1 - Antenne - Google Patents

Antenne Download PDF

Info

Publication number
EP0445453A1
EP0445453A1 EP90302418A EP90302418A EP0445453A1 EP 0445453 A1 EP0445453 A1 EP 0445453A1 EP 90302418 A EP90302418 A EP 90302418A EP 90302418 A EP90302418 A EP 90302418A EP 0445453 A1 EP0445453 A1 EP 0445453A1
Authority
EP
European Patent Office
Prior art keywords
antenna
array
terminations
dielectric
flat
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Withdrawn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
EP90302418A
Other languages
English (en)
French (fr)
Inventor
Alan Twelves
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Priority to EP90302418A priority Critical patent/EP0445453A1/de
Publication of EP0445453A1 publication Critical patent/EP0445453A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0075—Stripline fed arrays
    • H01Q21/0081—Stripline fed arrays using suspended striplines
    • 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

Definitions

  • This invention relates to a flat array triplate antenna particularly, but not exclusively, for receiving T.V. transmissions from a geostationary satellite.
  • U.S. patent 4,486,758 discloses a triplate antenna for coupling circularly polarised radiation to a plurality of feed lines by way of a planar array of such elements each having a pair of orthogonally disposed dipoles, the dipole array being positioned between conductive sheets each having corresponding arrays of apertures.
  • the dipole array and associated transmission strip lines are spaced from the conductive sheets by layers of dielectric material.
  • the dipoles are formed one from each pair on one surface of a dielectric sheet and the other one of the pair on the opposite surface of the sheet.
  • the respective strip line networks are also formed on the respective opposite surfaces of the sheet.
  • a third unapertured conductive sheet is spaced from one of the apertured conductive sheets to act as a reflective surface.
  • the antenna is fabricated in accordance with conventional rigid printed circuit techniques, which will cause fairly high losses to be encountered.
  • European patent application No. 0 252 779A proposes the use of metal plates which are shaped by pressing and stamping in order to form radiating slots and to emboss spacing abutments on the plate surfaces facing the dielectric sheet carrying printed conductors and terminations.
  • Application EP 0 252 779A states that the use of embossed spacing abutments obviates the need for expensive solid dielectric material to space the conductive sheets from the dielectric sheet carrying the printed conductors.
  • embossing of metal plates to form accurate spacing abutments is a complex and costly procedure to support the stripline.
  • a triplate antenna having a flat stripline feed structure supported between a pair of ground planes, said ground planes being formed by flat metal plates having a plurality of apertures aligned with each other, a plurality of fixings holding said plates at spaced apart locations, the stripline feed structure being formed on a thin flexible dielectric substrate which is maintained flat and parallel to the plates by foam dielectric material.
  • the foam dielectric material comprises on each side of said substrate a respective continuous foam dielectric sheet which is soft and gently embraces both the substrate and the respective plate.
  • each fixing is comprises an attachment which extends through the triplate and which has a spacer shank defining the maximum spacing between the outer surfaces of the plates at the location.
  • said structure has a plurality of support pillars in which said fixings are secured.
  • a flat array antenna comprising a dielectric film carrying on one surface a printed conductor pattern formed as an array of pairs of conductor terminations, the terminations of each pair being orthogonal to one another and connected together by a conductive stripline, the pairs of terminations each being connected to a common stripline feed structure, the dielectric film being spaced between two conductive surfaces each having an array of apertures corresponding to the array of termination pairs, characterised in that the conductive sheets are flat metal plates wherein the apertures are formed, and that the dielectric sheet is spaced from the metal plates by layers of dielectric foam material.
  • pairs of orthogonal terminations are disposed in an orthogonal array and the orientations of each pair of terminations are at 45 o to the perpendicular axes of the array.
  • the antenna comprises a suspended dielectric film 11 positioned between two metal plates 13, 15 by means of foam dielectric layers 17, 19.
  • the dielectric film 11 has formed thereon, by conventional printed circuit techniques pairs of circuit terminations or "excitation probes" 21, 23 which are orthogonally positioned with respect to one another, and this printed film forms the flat stripline feed structure.
  • the metal plates 13, 15 are each provided with an array of apertures 25, 27 arranged in respective orthogonal arrays.
  • the apertures 25 and 27 are fabricated in the flat metal plate 13, 15 by simple conventional metal stamping out techniques.
  • Applicants have found that it is practical to stamp out an array of holes in flat aluminium sheet of thickness of only o.5mm.
  • Such flat sheets have sufficient rigidity when sandwiched with layers of foam dielectric material, such as expanded polyethylene, to support the suspended stripline formed on a thin polyester film.
  • the film 11 and the plates 13, 15 are arranged so that the apertures 25, the pairs of probes 21, 23 and the apertures 27 are aligned perpendicular to the plane of the dielectric film 11 and together provide an array of antenna elements.
  • the probes of each pair are connected to each other by stripline sections (not shown) and all the stripline sections are connected to a common stripline feed structure (not shown) in accordance with known techniques to effect reception (or transmission) of circularly polarised radio frequency signals.
  • stripline sections not shown
  • all the stripline sections are connected to a common stripline feed structure (not shown) in accordance with known techniques to effect reception (or transmission) of circularly polarised radio frequency signals.
  • Such connection techniques are known from, for example, U.S. patent No. 4,792,810.
  • the antenna may be provided with a third, generally unapertured metal plate 29 spaced from the metal plate 15 to act as a reflector plate.
  • the triplate structure and the reflector plate 37 are secured to a rigid base 30, in this embodiment made of a moulded plastics, by fixings, in this embodiment screws 31, 33 respectively engaging with blind bores in pillars 35, 37 respectively passing through fixing holes in the plates 11, 13, 15 and 29.
  • screws 31, 33 respectively engaging with blind bores in pillars 35, 37 respectively passing through fixing holes in the plates 11, 13, 15 and 29.
  • shouldered pillars 39 which pass through close fitting holes in all the layers of the assembled structure to provide accurate lateral alignment of the apertures 25, 27 with the probes 21, 23. Note that the holes in the metal plates through which the pillars 35 pass are clearance holes to prevent distortion of the metal plates when the screws are tightened.
  • the screws 31 have shouldered spacer shank portions 31a of predetermined length so that when properly tightened they exert no undue compression on the triplate structure consisting of metal plates 13, 15, the suspended dielectric film 11 and supporting foam dielectric layers 17, 19, and determine the maximum spacing between the outer surfaces of the plates at each fixing location.
  • the length of the shouldered portion 31a is such that when the plates 13, 15 and foam layers 17, 19 are of maximum thickness allowed by manufacturing tolerance, there is insignificant compression and distortion of the triplate structure.
  • the thicknesses of 13, 15, 17 and 19 are the minimum allowable there will be insignificant slack in the holding of the triplate structure by the screws.
  • the foam dielectric layers 17, 19 are unapertured except for the holes where the locating and securing pillars pass through.
  • the screws 31, shoulder 31a and pillars 35, together with the foamed dielectric layers 17 and 19 accurately control the spacing between the outer surfaces of the ground planes 13 and 15.
  • the foam dielectric is soft and gently embraces the feed structure sufficient to prevent any periodic distortions near the fractional wavelength period mentioned above.
  • Applicants have noted that it is advantageous to have a diversity of orientations for the probe pairs 21, 23.
  • the performance of the antenna array is optimised when the alignments of the individual probes are at 45 o to the axes of the columns and rows of the orthogonal array of antenna elements.
  • the common feed stripline structure referred to above (and not shown in the drawings) has an output termination which couples into a rectangular waveguide 41 the propagation axis of which is perpendicular to the plane of the triplate structure.
  • the triplate structure is covered by a moulded plastics radome cover 43 which is secured at its edges to the base 30.
  • edges may be formed with lips (not shown) at right angle to the plane of the plates.
  • the reflecting plate 29 may be formed with right angled lips 45.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP90302418A 1990-03-07 1990-03-07 Antenne Withdrawn EP0445453A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90302418A EP0445453A1 (de) 1990-03-07 1990-03-07 Antenne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90302418A EP0445453A1 (de) 1990-03-07 1990-03-07 Antenne

Publications (1)

Publication Number Publication Date
EP0445453A1 true EP0445453A1 (de) 1991-09-11

Family

ID=8205319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90302418A Withdrawn EP0445453A1 (de) 1990-03-07 1990-03-07 Antenne

Country Status (1)

Country Link
EP (1) EP0445453A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542447A1 (de) * 1991-11-15 1993-05-19 Nortel Networks Corporation Ebene Plattenantenne
EP1643593A1 (de) * 2004-09-29 2006-04-05 Lucent Technologies Inc. Antennenelement mit Apertur
US7030825B1 (en) 2004-09-29 2006-04-18 Lucent Technologies Inc. Aperture antenna element
CN113540806A (zh) * 2021-07-21 2021-10-22 中国电子科技集团公司第三十八研究所 基于3d打印的一体化太赫兹波纹喇叭天线阵列及其制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064313A1 (de) * 1981-05-04 1982-11-10 Laboratoires D'electronique Et De Physique Appliquee L.E.P. Mikrowellenstrahlerelement für Zirkularpolarisation und ebene Mikrowellenantenne mit einer Gruppe solcher Elemente
EP0252779A1 (de) * 1986-06-05 1988-01-13 Emmanuel Rammos Antennenelement mit einem Streifen, der zwischen zwei selbsttragenden und mit untereinanderliegenden strahlenden Schlitzen vorgesehenen Grundplatten hängt und Verfahren zur Herstellung desselben
EP0312989A2 (de) * 1987-10-19 1989-04-26 Sony Corporation Mikrowellenantenne
EP0317414A1 (de) * 1987-11-13 1989-05-24 Emmanuel Rammos Flache Antenne mit SSL-Speisenetzwerk, bestehend aus selbsttragenden, mit dicken strahlenden Schlitzen ausgerüsteten Masseflächen ohne Positionierungsstifte

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064313A1 (de) * 1981-05-04 1982-11-10 Laboratoires D'electronique Et De Physique Appliquee L.E.P. Mikrowellenstrahlerelement für Zirkularpolarisation und ebene Mikrowellenantenne mit einer Gruppe solcher Elemente
EP0252779A1 (de) * 1986-06-05 1988-01-13 Emmanuel Rammos Antennenelement mit einem Streifen, der zwischen zwei selbsttragenden und mit untereinanderliegenden strahlenden Schlitzen vorgesehenen Grundplatten hängt und Verfahren zur Herstellung desselben
EP0312989A2 (de) * 1987-10-19 1989-04-26 Sony Corporation Mikrowellenantenne
EP0317414A1 (de) * 1987-11-13 1989-05-24 Emmanuel Rammos Flache Antenne mit SSL-Speisenetzwerk, bestehend aus selbsttragenden, mit dicken strahlenden Schlitzen ausgerüsteten Masseflächen ohne Positionierungsstifte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON BROADCASTING. vol. 34, no. 4, December 1988, NEW YORK US pages 457 - 464; ITO et al.: "PLANAR ANTENNAS FOR SATELLITE RECEPTION" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542447A1 (de) * 1991-11-15 1993-05-19 Nortel Networks Corporation Ebene Plattenantenne
EP1643593A1 (de) * 2004-09-29 2006-04-05 Lucent Technologies Inc. Antennenelement mit Apertur
US7030825B1 (en) 2004-09-29 2006-04-18 Lucent Technologies Inc. Aperture antenna element
CN113540806A (zh) * 2021-07-21 2021-10-22 中国电子科技集团公司第三十八研究所 基于3d打印的一体化太赫兹波纹喇叭天线阵列及其制作方法
CN113540806B (zh) * 2021-07-21 2023-06-06 中国电子科技集团公司第三十八研究所 基于3d打印的一体化太赫兹波纹喇叭天线阵列及其制作方法

Similar Documents

Publication Publication Date Title
CA1311555C (en) Microwave antenna
US4864314A (en) Dual band antennas with microstrip array mounted atop a slot array
US5355143A (en) Enhanced performance aperture-coupled planar antenna array
US5086304A (en) Flat phased array antenna
US4829314A (en) Microwave plane antenna simultaneously receiving two polarizations
EP0253128B1 (de) Mikrowellenantenne
US4958165A (en) Circular polarization antenna
US4878060A (en) Microwave plane antenna with suspended substrate system of lines and method for manufacturing a component
KR960016369B1 (ko) 평면안테나
US4914449A (en) Microwave antenna structure with intergral radome and rear cover
JPH09326631A (ja) マイクロ波平面アレイアンテナ
WO1988001444A1 (en) Flat phased array antenna
KR930010834B1 (ko) 고이득 및 고안테나 효율의 평면 안테나
US20050206575A1 (en) Dual polarisation antenna
JP2002151942A (ja) 固定通信用の平面状アンテナ及びそのアンテナのエラーを補償する方法
US4990926A (en) Microwave antenna structure
CN115280596A (zh) 可伸缩的模块化天线装置
EP0312989B1 (de) Mikrowellenantenne
US5614915A (en) Layered antenna
GB2241831A (en) Antenna
EP0445453A1 (de) Antenne
EP0542447B1 (de) Ebene Plattenantenne
EP0447018B1 (de) Antenne
JP3782278B2 (ja) 偏波共用アンテナのビーム幅制御方法
KR0142567B1 (ko) 슬롯판을 가지는 스트립라인 패치형 안테나

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19910116

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19921001