EP0637096B1 - Planar antenna with helical antenna array and strip line feeder pattern coupled thereto - Google Patents

Planar antenna with helical antenna array and strip line feeder pattern coupled thereto Download PDF

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Publication number
EP0637096B1
EP0637096B1 EP94111998A EP94111998A EP0637096B1 EP 0637096 B1 EP0637096 B1 EP 0637096B1 EP 94111998 A EP94111998 A EP 94111998A EP 94111998 A EP94111998 A EP 94111998A EP 0637096 B1 EP0637096 B1 EP 0637096B1
Authority
EP
European Patent Office
Prior art keywords
helical antenna
strip line
array
line feeder
antenna elements
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.)
Expired - Lifetime
Application number
EP94111998A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0637096A1 (en
Inventor
Seong-Hoon Hong
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
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 Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP0637096A1 publication Critical patent/EP0637096A1/en
Application granted granted Critical
Publication of EP0637096B1 publication Critical patent/EP0637096B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/14—Supports; Mounting means for wire or other non-rigid radiating elements
    • 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
    • H01Q21/067—Two dimensional planar arrays using endfire radiating aerial units transverse to the plane of the array

Definitions

  • the present invention relates to a planar antenna for the reception of Direct Broadcast Satellite(DBS) television signals; and, more particularly, to an improved planar antenar for providing higher aperture efficiency, improved polarization and increased production tolerability.
  • DBS Direct Broadcast Satellite
  • the planar antenna is made of an array of antenna elements, each antenna element being capable of receiving 12 GHz signals. Since these antenna elements constituting the array must be able to receive signals of a short wavelength, e.g., in the neighborhood of 2.5 cm, they must be small in size and a large array of elements is required in order to provide sufficient energy for satisfactory television pictures.
  • U.S. Patents 4,680,591 and 4,907, 012 each comprising an array of helical antenna elements with probes located with in a common resonant cavity of square cross section.
  • the cavity is used to combine all the outputs from the elements with a low loss.
  • U.S. patent 4,907,012 four inwardly-protruding buttresses are provided in the antenna, wherein each buttress is positioned mid-way along a side of the cavity to promote the formation of standing waves of a different mode thereby to improve the frequency range characteristics of the array.
  • an object of the present invention to provide an improved planar antenna capable of providing higher aperture efficiency, improved polarization and increased production tolerability through the use of an array of helical antenna elements and a strip line feeder pattern coupled thereto.
  • a planar antenna for the reception of Direct Broadcast Satellite television signals comprising: an array of M x N helical antenna elements, each helical antenna element including a helical antenna and a straight stem end portion attached thereto, wherein M and N are integers; a first dielectric layer having a top and a bottom surface and provided with an array of M x N through holes, wherein each of the through holes extends from the top surface to the bottom surface thereof, and each of the straight stem end portions passes through a corresponding through hole to thereby support its respective helical antenna element; a second dielectric layer having an upper and a bottom surface with a strip line feeder pattern deposited over the upper surface, wherein the straight stem end portion of each helical antenna element is electrically coupled to the strip line feeder pattern to thereby combine in phase output signals from each of the helical antenna elements; an output probe coupled electrically to the strip line feeder pattern to thereby output combined output signals; and a protective cover, consisting of a radome
  • FIG. 1 and 2 a perspective view of a planar antenna 100 in accordance with the present invention and a cross section view thereof taken along a line A-A shown in Fig. 1, respectively, comprising an array 10 of M x N helical antenna elements, e.g., 1 [(M-i),(N-j)] , a first dielectric layer 20 having a top and a bottom surfaces 2, 3 and provided with an array 30 of M x N through holes, e.g., 4 [(M-i),(N-j)] , extending from the top surface 2 to the bottom surface 3 thereof, a second dielectric layer 40 having an upper and a bottom surfaces 5, 6 with a strip line feeder pattern 50 deposited over the upper surface 5, an output probe 70 coupled electrically to the strip line feeder pattern 50, and a protective cover 80, consisting of a radome 7 and a protective layer 8, completely covering the top surface 2 of the first dielectric layer 20, and the array 10 of M x N helical antenna elements, e
  • each of the M x N helical antenna elements includes a helical antenna 9 [(M-i),(N-j)] and a straight stem end portion 11 [(M-i),(N-j)] attached thereto, and each of the straight stem end portions, e.g., 11 [(M-i),(N-j)] , passes through the corresponding through hole 4 [(M-i),(N-j)] and is electrically coupled to the strip line feeder pattern 50 to thereby combine in phase the output signals from each of the helical antenna elements.
  • the output probe 70 is coupled electrically to the strip line feeder pattern 50 to thereby output the combined output signals.
  • Fig. 3 a top view of the planar antenna showing an array of M x N helical antenna elements.
  • the distance(Sd) between neighboring helical antenna elements was determined with the object of reducing the effect of neighboring helical antenna elements on each other, and this distance is found to be 3/4 ⁇ g which is approximately 18 mm in the present invention, wherein ⁇ g is a wavelength of the signal.
  • strip line feeder pattern 50 As an example of the strip line feeder pattern 50 that might be used, there is shown in Fig. 4 a strip line feeder pattern suitable for an antenna comprising an array of 16 x 16 helical antenna elements.
  • the signals received by the helical antenna elements are combined 8 times before they reach the output probe 70 coupled to the center portion 13 via the strip line pattern 50. Since the length of the path each of the received signals travels and the structure the received signals pass through before they reach the center portion 13 are identical, the signals are in phase. Furthermore, as shown in Fig. 5, the width of the strip line pattern varies in order to match the impedance at the point where the signal get divided.
EP94111998A 1993-07-31 1994-08-01 Planar antenna with helical antenna array and strip line feeder pattern coupled thereto Expired - Lifetime EP0637096B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019930014906A KR950004634A (ko) 1993-07-31 1993-07-31 개선된 헤리컬 와이어 배열 평면안테나
KR9314906 1993-07-31

Publications (2)

Publication Number Publication Date
EP0637096A1 EP0637096A1 (en) 1995-02-01
EP0637096B1 true EP0637096B1 (en) 1999-07-07

Family

ID=19360613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111998A Expired - Lifetime EP0637096B1 (en) 1993-07-31 1994-08-01 Planar antenna with helical antenna array and strip line feeder pattern coupled thereto

Country Status (5)

Country Link
EP (1) EP0637096B1 (ko)
JP (1) JPH07176951A (ko)
KR (1) KR950004634A (ko)
CN (1) CN1101760A (ko)
DE (1) DE69419368D1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601046B1 (de) * 2004-05-28 2008-07-02 Huber + Suhner Ag Gruppenantenne mit einem Antennengehäuse
CN101814654B (zh) * 2010-05-11 2012-08-22 四川省视频电子有限责任公司 一种卫星电视地面接收自动寻星室内天线
CN111446553B (zh) * 2019-01-17 2024-04-02 富泰华工业（深圳）有限公司 天线结构及具有所述天线结构的无线通信装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647940A (en) * 1982-09-27 1987-03-03 Rogers Corporation Parallel plate waveguide antenna
GB8317938D0 (en) * 1983-07-01 1983-08-03 Emi Ltd Antenna
JPH02189008A (ja) * 1989-01-18 1990-07-25 Hisamatsu Nakano 円偏波アンテナ装置

Also Published As

Publication number Publication date
KR950004634A (ko) 1995-02-18
JPH07176951A (ja) 1995-07-14
EP0637096A1 (en) 1995-02-01
CN1101760A (zh) 1995-04-19
DE69419368D1 (de) 1999-08-12

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