EP0480917A1 - Antenne a lentille dielectrique pleine - Google Patents

Antenne a lentille dielectrique pleine

Info

Publication number
EP0480917A1
EP0480917A1 EP19890902802 EP89902802A EP0480917A1 EP 0480917 A1 EP0480917 A1 EP 0480917A1 EP 19890902802 EP19890902802 EP 19890902802 EP 89902802 A EP89902802 A EP 89902802A EP 0480917 A1 EP0480917 A1 EP 0480917A1
Authority
EP
European Patent Office
Prior art keywords
lens
aerial
layer
anaerial
reflecting layer
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Withdrawn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
EP19890902802
Other languages
German (de)
English (en)
Inventor
Clifford Rix
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of EP0480917A1 publication Critical patent/EP0480917A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/23—Combinations of reflecting surfaces with refracting or diffracting devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H01Q19/062—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for focusing
    • 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
    • H01Q9/0471—Non-planar, stepped or wedge-shaped patch

Definitions

  • the invention relates to aerials for the transmission or reception of electromagnetic wave energy with application to a wide range of frequency covering CB radio, radio and television.
  • Television aerials for example commonly fall into two types: directional aerials, generally suitable for outdoor or loft use and having a number of directorstoi ⁇ pr ⁇ vethedirectional gainoftheaerialandloopaerialswhich are siirple, cheapand suitable or indoor use. Indooraerialshave lowgain and are highly susceptible to shadowing and atmospheric influance on signal transmission
  • the object of the invention is toprovide an improved aerial capable ofwide angle response and particularly suited to indoor use.
  • Ihe invention provides an aerial for electromagnetic radiation comprising: a lens of material transparent to the radiation and having a dielectric constant suitable to refract the radiation and at least a surface portion which is convex; a material layer covering the surface portion and selected to reflect the radiation; and anelectrical connectionprovided tothe reflecting surface for carrying the aerial signal.
  • GB Patent application No 8615317 discloses a radar reflector comprising a mirrored dielectric lens. Such reflectors are used, for example, to provide GBPboatswitharadarreflectingcapabilitytofacilitateradarsearch. The inventor has made the surprising discovery that these passive radar reflectors can be used as aerials for transmission and reception of electromagnetic signals by suitable connection of signal wires to the radar reflector. The aerial has been found to effective over a wide range of frequencies for a single size of lens.
  • the dielectric constant of the lens material is substantially equal to 3.414.
  • an electrically conducting member may be formed on a surface of the lens remote rom the reflecting layer and an electrical connection provided to the conducting me-iber whereby signal wires are connectable to the conducting member and-the reflecting-layer.
  • - Hie lens may be a simple lens or a complex lens involving more * than one component. Inonearrangement thelensmaterialmaybesilicaglassbeadsor ' silica flour bound together by an adhesive, preferably a polyester resin binder. In thecaseofasinglelensthereflectivelayerandtheconducting member may then be coated on the outside of the lens.
  • the lens may be sphericaloralternativelyitmayhaveaplaneofsymmetrydefiningidentical forward and rearwardhalveswiththeconductivememberbeingattachedtothe forward half and the reflective layer being attached to the rearwardhalf.
  • thislens is axially-symmetricwith thelens surfacehavinga radius of curvature that increasesas thedistancefromthe axis increases.
  • thelens mayco ⁇ prisea shell, advantageously madeofpolycarbonate, and filledwithparticulatesilica flour, Sheshell maybe formedof twohalveswith the reflectinglayerandconductivemember, when present, located on the surface of respective halves.
  • the dielectric lens is located above an earthed plate, a coaxial cablebeingconnectedsuchthatthecentreconnectionisconnectedto the reflective layer and the screen wire is connected tothe earthedplate.
  • a solder tag is attached toapartially copper platedportion of the reflective layer for attachment of the signal wire.
  • an electricallyisolatedconductingbackplate isprovidedperpendiculartothe earthed plate.
  • Figures 1 and2 showa spherical lensaerial inend elevation and side cross section
  • Figure 3 shows a sectional view of an alternative non-spherical lens arrangement
  • FIG. 4 shows in section a further modification of the invention
  • Figure 5 shows a modification to the Figure 3 aerial
  • the invention makes use of a dielectric lens/reflector arrangements as described intheGBPatentApplicationNo8615317.
  • Bywayofexample Figures 1 and2 show a solid spherical lens 10 formed bymoulding amixtureof silica flour and a polyester resin binder. Spray coated over one hemisphere is a reflecting layer 11 of zinc.
  • Bie lens material was selected such that the dielectricconstantwasapproximatelyequal to3.414 andthedielectricloss in the material was lew.
  • Such lenses can be designed for high efficiency radar reflection over a wide range of incidence angles 12.
  • a cruciform copper electrode 13 is located axially (14) on the front face15 of thelens10.
  • Acoaxial cable16 is connected to the aerial such that the signal wire 17 is connected to the electrode 13 and the screen is connected to the reflecting layer 11.
  • Figure 3 shows an alternative moulded lens 30 which is symmetrical about the optical axis 31 and the perpendicular plane 32. Ihe radius of curvature is smallest (33) on the opticalaxisandincreasestowardstheplaneof ⁇ y ⁇ metry32.
  • acruciformelectrode35 isprovidedonthefronthalf36 ofthe lens and a reflecting zinc coating 37 covers the rearwardhalf of the lens.
  • the dielectric lens aerial arrangements havebeen shown tobe effective for receivingTVand radiosignalsindoorswhereconventional aerialshavepr ⁇ v-ed inadequate.
  • Inadditiontheinvention hasbeenappliedtoCitizensBand (CB) c ⁇ munications and again the results have been surprisingly good.
  • Lens diameters of 13.5 cm and 7.5 cm have been used.
  • FIG. 4 A further arrangement is shown in Figure 4 applied to a spherical lens although this could also be applied to the non-spherical Figure 3 lens.
  • a polycarbonatespherical shell 40 formedoftwohemisphericalhalves41 and42 hasacruciformcopperelectrode43 formedinsideonehalf41andtheinsideof the second half 42 is coated with a reflective zinc coating 44.
  • the hollow interior of the lens is filledwith silica flour through a hole (not shown) provided therefor in the polycarbonate shell 40.
  • the shell is sealed and electrical connections to the electrode 43 and reflector 44 are ⁇ ade through the shell wall.
  • the dielectric constant of the lens material is substantially 3.414.
  • Acoaxial signal cable52 is arranged such that the centreconductor 53 isconnectedtotheconducting zinc layer 37.
  • An -impedance matching capacitor 54 adjusted for rr_3x_j ⁇ urn signal strength, is connectedbetween the centreconductor 53 and the cable screen 55.
  • T e dielectric lens 61 is pointed in the general direction 62 of the earth satellite and is mounted above an earthed plate 63.
  • a solder tag connection64 ismade to apartiallycopper coatedportionofthereflective layer 65 of the lens.
  • a coaxial signal cable is provided with the centre conductor64' connectedtothelensreflectivelayerviathesoldertag64and theconducting screenwire66 connectedtotheearthedplate63. Theaerial has been used successfully for both transmission and reception.

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

Une antenne pour rayonnement électromagnétique comprend une lentille (65) en matière diélectrique transparente au rayonnement, et ayant une constante diélectrique sensiblement égale à 3,414. Une partie de surface convexe comporte une couche métallique (65) afin de réfléchir le rayonnement, une connexion électrique (64) étant prévue pour la surface réfléchissante afin de véhiculer le signal de l'antenne. Le matériau des lentilles peut être des billes de verre de silice ou de la poudre de silice liées ensemble par un adhésif, de préférence un liant en résine polyester, avec la couche réfléchissante enduite sur le côté extérieur de la lentille. Ladite lentille peut être sphérique ou dans un autre mode de réalisation, elle peut avoir un plan de symétrie (32) et être formée de sorte que la lentille est axialement symétrique avec la surface de la lentille ayant un rayon de courbure augmentant à mesure que la distance à partir de l'axe augmente. Ladite lentille peut comprendre une enveloppe (36) en polycarbonate formée de deux moitiés et remplie de poudre de silice particulaire. La couche réfléchissante est disposée sur la surface interne de l'enveloppe de la lentille.
EP19890902802 1988-02-23 1989-02-17 Antenne a lentille dielectrique pleine Withdrawn EP0480917A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8804175 1988-02-23
GB888804175A GB8804175D0 (en) 1988-02-23 1988-02-23 Solid dielectric lens aerial

Publications (1)

Publication Number Publication Date
EP0480917A1 true EP0480917A1 (fr) 1992-04-22

Family

ID=10632202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890902802 Withdrawn EP0480917A1 (fr) 1988-02-23 1989-02-17 Antenne a lentille dielectrique pleine

Country Status (6)

Country Link
EP (1) EP0480917A1 (fr)
JP (1) JPH03502865A (fr)
AU (1) AU3190689A (fr)
BR (1) BR8907267A (fr)
GB (1) GB8804175D0 (fr)
WO (1) WO1989008932A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8904474D0 (en) * 1989-02-28 1989-04-12 Secr Defence Reflector for electromagnetic energy
DE69212807T2 (de) * 1991-01-28 1997-01-30 Thomson Multimedia Sa Antennensystem
JPH0722834A (ja) * 1993-06-30 1995-01-24 Murata Mfg Co Ltd アンテナ用誘電体レンズ及びその製造方法
JP3257383B2 (ja) * 1996-01-18 2002-02-18 株式会社村田製作所 誘電体レンズ装置
WO1998015033A1 (fr) * 1996-09-30 1998-04-09 Qualcomm Incorporated Ensemble a lentille dielectrique pour antenne d'alimentation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145382A (en) * 1961-08-21 1964-08-18 Emerson & Cuming Inc Microwave reflector
US3287728A (en) * 1963-05-07 1966-11-22 Atlas David Zoned radiant energy reflector and antenna having a glory ray and axial ray in phase at the focal point
GB1390514A (en) * 1971-11-24 1975-04-16 Marconi Co Ltd Aerial elements and arrays
JPS6052528B2 (ja) * 1977-05-02 1985-11-20 株式会社トキメック 軽量混合誘電体およびその製法
DE3134122A1 (de) * 1981-08-28 1983-03-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Antennensystem mit dielektrikum

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8908932A1 *

Also Published As

Publication number Publication date
JPH03502865A (ja) 1991-06-27
BR8907267A (pt) 1991-03-12
AU3190689A (en) 1989-10-05
GB8804175D0 (en) 1988-03-23
WO1989008932A1 (fr) 1989-09-21

Similar Documents

Publication Publication Date Title
EP0420137A2 (fr) Structure à deux couches diélectriques d'adaptation pour radomes et lentilles pour grands-angles d'incidence
US5534880A (en) Stacked biconical omnidirectional antenna
US3975738A (en) Periodic antenna surface of tripole slot elements
US4647940A (en) Parallel plate waveguide antenna
US4970634A (en) Radar transparent materials
CN111525256B (zh) 异质异构共形低rcs机载天线罩
US10658756B1 (en) Earth coverage antenna system for Ka-band communication
EP0480917A1 (fr) Antenne a lentille dielectrique pleine
JPH02228103A (ja) 円錐形ホーンアンテナ
US3133284A (en) Paraboloidal antenna with compensating elements to reduce back radiation into feed
EP0394220A1 (fr) Cible-radar passive
US4740791A (en) Antenna with pseudo-toric coverage having two reflectors
JPS58129806A (ja) 反射器及びその製造方法
CN216085314U (zh) 一种基于球型透镜的立体多波束天线
CN103227359B (zh) 具有类环状辐射场图的紧凑超宽带天线
US4689629A (en) Surface wave antenna
EP0055591A1 (fr) Antenne réceptrice conique du type Jemcy
EP0599879B1 (fr) Reflecteurs radar
EP0461125B1 (fr) Reflecteur d'energie electromagnetique
US4682179A (en) Omnidirectional electromagnetic lens
US5565880A (en) Antenna for portable telecommunication systems
JP2508071B2 (ja) 帯電防止カバ−を有するアンテナ
CN107634339B (zh) 基于超表面的高定向性伞状凸面共形反射面天线
EP0502944A1 (fr) Antenne
US5365245A (en) Hybrid orthogonal transverse electromagnetic fed reflector antenna

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: 19900731

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL 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: 19930901