EP0877440A1 - Directivity varying type diversity antenna apparatus - Google Patents

Directivity varying type diversity antenna apparatus Download PDF

Info

Publication number
EP0877440A1
EP0877440A1 EP98303451A EP98303451A EP0877440A1 EP 0877440 A1 EP0877440 A1 EP 0877440A1 EP 98303451 A EP98303451 A EP 98303451A EP 98303451 A EP98303451 A EP 98303451A EP 0877440 A1 EP0877440 A1 EP 0877440A1
Authority
EP
European Patent Office
Prior art keywords
antenna
diversity
phase
directivity
receiving
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Withdrawn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
EP98303451A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hiroyuki Tachihara
Masatoshi Saito
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.)
Harada Industry Co Ltd
Original Assignee
Harada Industry 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 Harada Industry Co Ltd filed Critical Harada Industry Co Ltd
Publication of EP0877440A1 publication Critical patent/EP0877440A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive 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
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens

Definitions

  • the present invention relates to a directivity varying type diversity antenna apparatus favorably used as an antenna apparatus which is to be mounted on an automobile and the like.
  • FIG. 14 is a view of the constitution of a prior art diversity reception type antenna apparatus which is mounted on the window of an automobile.
  • two antenna elements 101 and 102 which are constituted of copper-made strips, are meanderingly formed on the rear window 10 of the automobile. These two antenna elements are capable of receiving a radio wave of frequency bands adapted to an FM/AM and TV tuner 104 for receiving FM (frequency-modulated), AM (amplitude-modulated) and TV waves, and also receiving an antenna signal necessary for diversity reception.
  • the antenna elements 101 and 102 are connected to an FM/AM and TV diversity processing circuit 103.
  • An RF signal is supplied from the circuit 103 to the tuner 104.
  • the tuner 104 sends out a signal such as an IF (intermediate frequency) signal for monitoring the receiving conditions, which is fed back to the diversity processing circuit 103.
  • IF intermediate frequency
  • the antenna elements of the above prior art antenna apparatus do not change the directivity of an antenna.
  • the tuner monitors the receiving conditions such as interference noise, receiving level, and vertical/horizontal synchronizing state (TV).
  • the tuner detects radio disturbance or abnormal electric field strength, its information is fed back to the diversity processing circuit 103, and one of the antenna elements is switched to the other whose receiving level is higher.
  • the antenna elements 101 and 102 are simply switched to each other, and each of the antenna elements does not execute any specific processing or control in accordance with the receiving conditions.
  • a directivity varying type diversity antenna apparatus comprising a means for selectively combining a plurality of elements and controlling phases of the plurality of elements in order to vary a directivity of an antenna in accordance with a receiving condition when an FM/AM wave and a TV wave is received.
  • a directivity varying type diversity antenna apparatus comprising:
  • FIG. 1 is a block diagram of the constitution of a directivity varying type diversity antenna apparatus according to an embodiment of the present invention.
  • a plurality of nondirectional (vertically polarized plane wave) antenna elements 11 and 12 to 1n which are constituted of copper-made strips, are arranged at regular intervals horizontally on a rear window 10 of an automobile.
  • These antenna elements 11 and 12 to 1n are connected to a plurality of branch terminals of an antenna selecting switch 20.
  • the switch 20 includes a reception antenna selecting means for selecting a diversity reception antenna by selectively combining the specifically-positioned ones of the nondirectional antenna elements.
  • a reception antenna selecting means for selecting a diversity reception antenna by selectively combining the specifically-positioned ones of the nondirectional antenna elements.
  • two or more antenna elements (four in this embodiment) per one system are selected as antenna elements required for reception, and thus the diversity reception antenna is selected.
  • the antenna elements A1 to A4 are selected such that when the wavelength of their received wave is ⁇ , an interval between the antenna elements is ⁇ /4. Since the wavelength varies from received wave to received wave, a large number of antenna elements are provided in advance so as to be selected without any trouble.
  • the phase shifter 30 is a phase control means for controlling the phases of RF signals of radio waves received by the antenna elements A1 to A4 so as to have a predetermined relationship in the phases. If the relationship in phase between the RF signals is varied, desired directivity is obtained, resulting in better receiving condition than that of normal diversity receiving condition.
  • the RF signals the phases of which are varied by the phase shifter 30, are mixed by a mixer 40 and the mixed signal is supplied to an FM/AM and TV diversity processing circuit 50.
  • the RF signal output from the circuit 50 is supplied to an FM/AM and TV tuner 60.
  • the tuner 60 sends a signal such as an IF (intermediate frequency) signal for monitoring the receiving condition, and this signal is fed back to the diversity processing circuit 50.
  • the diversity processing of the diversity processing circuit 50 is substantially the same as that of the prior art circuit. However, the circuit 50 outputs an information signal S1 indicative of the receiving condition, and the information signal S1 is supplied to a CPU 70.
  • the CPU 70 includes a directivity varying control means.
  • the CPU 70 performs an operation to obtain the optimum directivity based on the information signal S1.
  • an instruction signal S2 for selecting an antenna element is supplied to the antenna selecting switch 20.
  • another instruction signal S3 for changing a phase relationship between the RF signals is supplied to the phase shifter 30.
  • the directivity of a selected diversity reception antenna can be varied.
  • the factors in varying the directivity are intervals between the selected antenna elements and the phase relationship between RF signals generated from the antenna elements.
  • FIGS. 2 to 13 are pattern views illustrating the directivity on the horizontal plane when the phase relationship between the first to fourth antenna elements is variably set in a predetermined state under the following specific conditions:
  • FIGS. 2 to 13 The phases of antenna elements A1 to A4 in each of FIGS. 2 to 13 are as follows: FIG. 2 Phase of antenna element A1 0.00 Phase of antenna element A2 0.00 Phase of antenna element A3 0.00 Phase of antenna element A4 0.00 FIG. 3 Phase of antenna element A1 180.00 Phase of antenna element A2 0.00 Phase of antenna element A3 0.00 Phase of antenna element A4 180.00 FIG. 4 Phase of antenna element A1 0.00 Phase of antenna element A2 180.00 Phase of antenna element A3 0.00 Phase of antenna element A4 180.00 FIG. 5 Phase of antenna element A1 0.00 Phase of antenna element A2 90.00 Phase of antenna element A3 270.00 Phase of antenna element A4 0.00 FIG.
  • FIG. 7 Phase of antenna element A1 0.00 Phase of antenna element A2 270.00 Phase of antenna element A3 180.00 Phase of antenna element A4 0.00
  • FIG. 8 Phase of antenna element A1 0.00 Phase of antenna element A2 180.00 Phase of antenna element A3 270.00 Phase of antenna element A4 0.00
  • FIG. 9 Phase of antenna element A1 270.00 Phase of antenna element A2 180.00 Phase of antenna element A3 90.00 Phase of antenna element A4 0.00
  • FIG. 10 Phase of antenna element A1 0.00 Phase of antenna element A2 90.00 Phase of antenna element A3 180.00 Phase of antenna element A4 270.00
  • FIG. 10 Phase of antenna element A1 0.00 Phase of antenna element A2 90.00 Phase of antenna element A3 180.00 Phase of antenna element A4 270.00 FIG.
  • the directivity of the antenna can be varied in accordance with the receiving conditions so as to prevent a radio disturbance. That is, the antenna apparatus of the present invention is of an active type. Since the directivity is automatically selected in accordance with the receiving conditions, the reception most suitable for the conditions of the receiving area can be achieved. Consequently, a radio disturbance can be avoided with a considerably higher probability than that in the prior art diversity reception, and good reception can always be performed.
  • the directivity diversity receiving function is added to the current diversity receiving function.
  • the antenna apparatus has a double diversity function.
  • the directivity varying type diversity antenna apparatus can be modified as follows:

Landscapes

  • Radio Transmission System (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
EP98303451A 1997-05-08 1998-05-01 Directivity varying type diversity antenna apparatus Withdrawn EP0877440A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9118223A JPH10308694A (ja) 1997-05-08 1997-05-08 指向性可変形ダイバシティアンテナ装置
JP118223/97 1997-05-08

Publications (1)

Publication Number Publication Date
EP0877440A1 true EP0877440A1 (en) 1998-11-11

Family

ID=14731277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98303451A Withdrawn EP0877440A1 (en) 1997-05-08 1998-05-01 Directivity varying type diversity antenna apparatus

Country Status (2)

Country Link
EP (1) EP0877440A1 (ja)
JP (1) JPH10308694A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1003239A2 (en) * 1998-11-19 2000-05-24 Harada Industry Co., Ltd. Antenna apparatus for use in Automobiles
EP1032073A2 (en) * 1999-02-26 2000-08-30 Nippon Sheet Glass Co., Ltd. Vehicle-mounted VHF diversity system
WO2000077951A1 (en) * 1999-06-11 2000-12-21 Allgon Ab A method for controlling the radiation pattern of an antenna means, an antenna system and a radio communication device
EP1701407A1 (de) * 2005-03-08 2006-09-13 Hirschmann Car Communication GmbH Mehrantennen-Empfangssystem in Fahrzeugen
EP1763151A2 (de) * 2005-09-12 2007-03-14 FUBA Automotive GmbH & Co. KG Antennendiversityanlage zum Funkempfang für Fahrzeuge
US7489948B2 (en) 2004-01-30 2009-02-10 Advanced Telecommunications Research Institute International Receiver capable of receiving radio signal with high quality

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521732A1 (de) * 1984-06-18 1986-01-02 Asahi Glass Co. Ltd., Tokio/Tokyo Antennenvorrichtung fuer einen fernsehempfaenger in einem kraftfahrzeug
DE4321805A1 (de) * 1992-06-30 1994-01-27 Nippon Sheet Glass Co Ltd FM-Übertragungsantenneneinrichtung für Kraftfahrzeuge und TV-Übertragungsantenneneinrichtung für Kraftfahrzeuge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521732A1 (de) * 1984-06-18 1986-01-02 Asahi Glass Co. Ltd., Tokio/Tokyo Antennenvorrichtung fuer einen fernsehempfaenger in einem kraftfahrzeug
DE4321805A1 (de) * 1992-06-30 1994-01-27 Nippon Sheet Glass Co Ltd FM-Übertragungsantenneneinrichtung für Kraftfahrzeuge und TV-Übertragungsantenneneinrichtung für Kraftfahrzeuge

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BOCHMANN H: "VIER ANTENNEN AN EINEM EMPFAENGER", FUNKSCHAU, vol. 64, no. 1, 27 December 1991 (1991-12-27), pages 66 - 70, XP000279000 *
LINDENMEIER H K ET AL: "ANTENNA AND DIVERSITY TECHNIQUES FOR BROADCAST RECEPTION IN VEHICLES", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSIS), CHICAGO, JULY 20 - 24, 1992, vol. VOL. 2, no. -, 20 July 1992 (1992-07-20), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1097 - 1100, XP000342287 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1003239A2 (en) * 1998-11-19 2000-05-24 Harada Industry Co., Ltd. Antenna apparatus for use in Automobiles
EP1003239A3 (en) * 1998-11-19 2001-11-07 Harada Industry Co., Ltd. Antenna apparatus for use in Automobiles
US6414624B2 (en) 1998-11-19 2002-07-02 Harada Industry Co., Ltd. Antenna apparatus for use in automobiles
EP1032073A2 (en) * 1999-02-26 2000-08-30 Nippon Sheet Glass Co., Ltd. Vehicle-mounted VHF diversity system
EP1032073A3 (en) * 1999-02-26 2003-07-09 Nippon Sheet Glass Co., Ltd. Vehicle-mounted VHF diversity system
WO2000077951A1 (en) * 1999-06-11 2000-12-21 Allgon Ab A method for controlling the radiation pattern of an antenna means, an antenna system and a radio communication device
CN1311649C (zh) * 1999-06-11 2007-04-18 Amc森托瑞恩股份公司 天线装置辐射图形控制方法
US7489948B2 (en) 2004-01-30 2009-02-10 Advanced Telecommunications Research Institute International Receiver capable of receiving radio signal with high quality
EP1701407A1 (de) * 2005-03-08 2006-09-13 Hirschmann Car Communication GmbH Mehrantennen-Empfangssystem in Fahrzeugen
EP1763151A2 (de) * 2005-09-12 2007-03-14 FUBA Automotive GmbH & Co. KG Antennendiversityanlage zum Funkempfang für Fahrzeuge
EP1763151A3 (de) * 2005-09-12 2013-05-29 Delphi Delco Electronics Europe GmbH Antennendiversityanlage zum Funkempfang für Fahrzeuge

Also Published As

Publication number Publication date
JPH10308694A (ja) 1998-11-17

Similar Documents

Publication Publication Date Title
EP0856905B1 (en) Windowpane antenna apparatus for use in vehicles
ES2109992T5 (es) Instalacion de antenas en diversidad con al menos dos antenas para la recepcion movil de ondas metricas y decimetricas.
US20080026705A1 (en) Digital Broadcast Receiving Antenna Apparatus and Movable Body Incorporating the Same
US7340274B2 (en) Cellular phone capable of receiving a plurality of broadcast waves
US20040130496A1 (en) Diversity antenna and method for controlling the same
JPH0621711A (ja) 自動車用アンテナ装置
EP1645114B1 (en) Integrated circuit for a mobile television receiver
EP0877440A1 (en) Directivity varying type diversity antenna apparatus
JP2005072782A (ja) アンテナおよびそれを用いた受信装置
US20040248538A1 (en) Radio receiver system
US5794134A (en) Receiving circuit for a portable telephone set
JPH08146117A (ja) ダイバーシチ受信装置
EP0815657A1 (en) A radio receiver for vehicle use
JPH09214237A (ja) 位相制御アレーアンテナ
JP2629219B2 (ja) 衛星放送用のダイバシティ受信装置
JPS63269625A (ja) 自動車のアンテナ装置
WO1997015961A1 (en) A linear diversity antenna
JP2000078044A (ja) アンテナ装置
JP2003087037A (ja) アンテナ及びアンテナ装置
JPH10145122A (ja) 車両用ガラスアンテナシステム
JP2016197805A (ja) 直線偏波受信装置
JPH0865023A (ja) 車両用ガラスアンテナおよび受信装置
JP2001028509A (ja) ダイバーシチ受信装置及び携帯端末
JPH07170220A (ja) ダイバーシティ受信装置
JPH0374905A (ja) 電子制御アンテナ装置

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: 19980522

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT NL SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Free format text: DE ES FR GB IT NL SE

17Q First examination report despatched

Effective date: 19991202

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: 20000413