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Withdrawn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)
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Withdrawn legal-status Critical Current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)

Abstract

A directivity varying type diversity antenna apparatus of the present invention includes a plurality of nondirectional antenna elements (11 to 1n) arranged at regular intervals, a receiving antenna determination means (20) for determining a diversity receiving antenna (A1 to A4) by selecting antenna elements (11 to 1n), arranged in specific positions, from among the plurality of nondirectional antenna elements and combining the selected antenna elements, a phase control means (30) for controlling a relationship in phase between RF signals of radio waves received by the diversity receiving antenna (A1 to A4) determined by the receiving antenna determination means (20), a diversity processing means (50) for diversity-processing the RF signals whose phases are controlled and supplying the diversity-processed RF signals to a tuner (60), and a directivity varying control means (70) for properly performing an operation of directivity based on information indicative of receiving conditions, supplying a first instruction signal (S2) for changing an antenna element to the receiving antenna determination means (20) and supplying a second instruction signal (S3) for changing the relationship in phase between the RF signals to the phase control means (30) in accordance with a result of the operation.

Description

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. In FIG. 14, 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.
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). When 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. In other words, in the prior art antenna apparatus, 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.
Consequently, since a large variety of antenna elements are arranged on the rear window 10 of the automobile in order to receive FM/AM and TV waves, there is strong possibility that even when one of the antenna elements is switched to the other, the latter antenna element will undergo a radio disturbance.
It is accordingly an object of the present invention to provide a directivity varying type diversity antenna apparatus whose directivity is varied with the receiving conditions of FM/AM and TV waves and which is adapted to the strength of an electric field in the receiving area and reduced in noise thereby to always receive the waves satisfactorily.
To attain the above object, according to one aspect of the present invention, there is provided 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.
According to another aspect of the present invention, there is provided a directivity varying type diversity antenna apparatus comprising:
  • a plurality of nondirectional antenna elements arranged at regular intervals;
  • receiving antenna determination means for determining a diversity receiving antenna by selecting antenna elements, arranged in specific positions, from among the plurality of nondirectional antenna elements and combining the selected antenna elements;
  • phase control means for controlling a relationship in phase between RF signals of radio waves received by the diversity receiving antenna determined by the receiving antenna determination means;
  • diversity processing means for diversity-processing the RF signals whose phases are controlled by the phase control means and supplying the diversity-processed RF signals to a tuner; and
  • directivity varying control means for properly performing an operation of directivity based on information indicative of receiving conditions, which is output from the diversity processing means, supplying a first instruction signal for changing an antenna element to the receiving antenna determination means and supplying a second instruction signal for changing the relationship in phase between the RF signals to the phase control means in accordance with a result of the operation.
    • This invention can be more fully understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:
  • FIG. 1 is a block diagram showing the constitution of a directivity varying type diversity antenna apparatus according to an embodiment of the present invention;
  • FIG. 2 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a first state under the specific conditions;
  • FIG. 3 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a second state under the specific conditions;
  • FIG. 4 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a third state under the specific conditions;
  • FIG. 5 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a fourth state under the specific conditions;
  • FIG. 6 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a fifth state under the specific conditions;
  • FIG. 7 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a sixth state under the specific conditions;
  • FIG. 8 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a seventh state under the specific conditions;
  • FIG. 9 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into an eighth state under the specific conditions;
  • FIG. 10 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a ninth state under the specific conditions;
  • FIG. 11 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a tenth state under the specific conditions;
  • FIG. 12 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into an eleventh state under the specific conditions;
  • FIG. 13 is a pattern view of the directivity of the antenna apparatus shown in FIG. 1, when the phase of each antenna element of the apparatus is changed into a twelfth state under the specific conditions; and
  • 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.
    • (Embodiment)
    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. As illustrated in FIG. 1, 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. Thus, 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 λ, an interval between the antenna elements is λ/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.
    Four RF signals are taken out by the antenna selecting switch 20 and supplied to a phase shifter 30. 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. In accordance with the result of the operation, an instruction signal S2 for selecting an antenna element is supplied to the antenna selecting switch 20. Further, another instruction signal S3 for changing a phase relationship between the RF signals is supplied to the phase shifter 30.
    Thus, 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:
  • 1) Received frequency    98MHz
  • 2) Antenna elements in use    four nondirectional antenna elements A1 to A4
  • 3) Interval between antenna elements    λ/4 (= about 750 mm)
  • 4) Directions corresponding to the front and rear of an automobile    0° to 180° of the pattern views
    • 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. 6 Phase of antenna element A1 0.00
    Phase of antenna element A2 270.00
    Phase of antenna element A3 90.00
    Phase of antenna element A4 0.00
    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. 11 Phase of antenna element A1 180.00
    Phase of antenna element A2 180.00
    Phase of antenna element A3 0.00
    Phase of antenna element A4 180.00
    FIG. 12 Phase of antenna element A1 0.00
    Phase of antenna element A2 180.00
    Phase of antenna element A3 180.00
    Phase of antenna element A4 180.00
    FIG. 13 Phase of antenna element A1 0.00
    Phase of antenna element A2 0.00
    Phase of antenna element A3 180.00
    Phase of antenna element A4 180.00
    In the directivity varying type diversity antenna apparatus of the above embodiment, 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.
    In the directivity varying type diversity antenna apparatus of the present invention, the directivity diversity receiving function is added to the current diversity receiving function. Thus, the antenna apparatus has a double diversity function.
    (Modifications)
    The directivity varying type diversity antenna apparatus according to the embodiment of the present invention can be modified as follows:
  • i) A diversity receiving antenna is selected using nondirectional antenna elements arranged at an interval shifted from λ/4.
  • ii) The antenna apparatus is mounted everywhere except the window of an automobile.

    • Claims (3)

    1. A directivity varying type diversity antenna apparatus characterized by comprising a means (20, 30) for selectively combining a plurality of elements (A1 to A4) and controlling phases of the plurality of elements (A1 to A4) 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.
    2. A directivity varying type diversity antenna apparatus characterized by comprising:
      a plurality of nondirectional antenna elements (11 to 1n) arranged at regular intervals;
      receiving antenna determination means (20) for determining a diversity receiving antenna (A1 to A4) by selecting antenna elements, arranged in specific positions, from among the plurality of nondirectional antenna elements (11 to 1n) and combining the selected antenna elements (A1 to A4);
      phase control means (30) for controlling a relationship in phase between RF signals of radio waves received by the diversity receiving antenna (A1 to A4) determined by the receiving antenna determination means (20);
      diversity processing means (50) for diversity-processing the RF signals whose phases are controlled by the phase control means (30) and supplying the diversity-processed RF signals to a tuner (60); and
      directivity varying control means (70) for properly performing an operation of directivity based on information indicative of receiving conditions, which is output from the diversity processing means (50), supplying a first instruction signal (S2) for changing an antenna element to the receiving antenna determination means (20) and supplying a second instruction signal (53) for changing the relationship in phase between the RF signals to the phase control means (30) in accordance with a result of the operation.
    3. The directivity varying type diversity antenna apparatus according to claim 2, characterized in that the plurality of nondirectional antenna elements (11 to 1n) are a plurality of copper-made strip conductors and arranged at regular intervals horizontally on a rear window (10) of an automobile.
    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
    JP118223/97 1997-05-08
    JP9118223A JPH10308694A (en) 1997-05-08 1997-05-08 Directivity variable diversity antenna system

    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 (en)
    JP (1) JPH10308694A (en)

    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 (en) * 2005-03-08 2006-09-13 Hirschmann Car Communication GmbH Multi-antenna receiving system in vehicles
    EP1763151A2 (en) * 2005-09-12 2007-03-14 FUBA Automotive GmbH & Co. KG Antenna diversity device for reception in vehicles
    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 (en) * 1984-06-18 1986-01-02 Asahi Glass Co. Ltd., Tokio/Tokyo ANTENNA DEVICE FOR A TELEVISION RECEIVER IN A MOTOR VEHICLE
    DE4321805A1 (en) * 1992-06-30 1994-01-27 Nippon Sheet Glass Co Ltd Vehicle FM and TV broadcasting antenna system - combines phase shifted broadcast signals and selects signal for best reception using diversity control

    Patent Citations (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3521732A1 (en) * 1984-06-18 1986-01-02 Asahi Glass Co. Ltd., Tokio/Tokyo ANTENNA DEVICE FOR A TELEVISION RECEIVER IN A MOTOR VEHICLE
    DE4321805A1 (en) * 1992-06-30 1994-01-27 Nippon Sheet Glass Co Ltd Vehicle FM and TV broadcasting antenna system - combines phase shifted broadcast signals and selects signal for best reception using diversity control

    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 (en) * 1999-06-11 2007-04-18 Amc森托瑞恩股份公司 Method for controlling radiation pattern of antenna means, antenna system and radio communication device
    US7489948B2 (en) 2004-01-30 2009-02-10 Advanced Telecommunications Research Institute International Receiver capable of receiving radio signal with high quality
    EP1701407A1 (en) * 2005-03-08 2006-09-13 Hirschmann Car Communication GmbH Multi-antenna receiving system in vehicles
    EP1763151A2 (en) * 2005-09-12 2007-03-14 FUBA Automotive GmbH & Co. KG Antenna diversity device for reception in vehicles
    EP1763151A3 (en) * 2005-09-12 2013-05-29 Delphi Delco Electronics Europe GmbH Antenna diversity device for reception in vehicles

    Also Published As

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

    Similar Documents

    Publication Publication Date Title
    EP0856905B1 (en) Windowpane antenna apparatus for use in vehicles
    KR20100134541A (en) Antenna for radio reception with diversity function in a vehicle
    ES2109992T5 (en) INSTALLATION OF ANTENNAS IN DIVERSITY WITH AT LEAST TWO ANTENNAS FOR MOBILE RECEPTION OF METRIC AND DECIMETRIC WAVES.
    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 (en) Antenna system for automobile
    EP1645114B1 (en) Integrated circuit for a mobile television receiver
    EP0877440A1 (en) Directivity varying type diversity antenna apparatus
    JP2005072782A (en) Antenna and receiver using the same
    US6040799A (en) Beam steering antenna unit
    US20040248538A1 (en) Radio receiver system
    JP3328494B2 (en) Phase control array antenna
    US5794134A (en) Receiving circuit for a portable telephone set
    JPH08146117A (en) Diversity receiving device
    WO1996028899A1 (en) A radio receiver for vehicle use
    JP2629219B2 (en) Diversity receiver for satellite broadcasting
    JPS63269625A (en) Antenna system for automobile
    EP0857359A1 (en) A linear diversity antenna
    JP2000078044A (en) Antenna system
    JP2003087037A (en) Antenna, and antenna apparatus
    JPH10145122A (en) Vehicle-use glass antenna system
    JP2016197805A (en) Linear polarization receiver
    JPH0865023A (en) Glass antenna for vehicle and receiver
    JP2001028509A (en) Diversity receiver and portable terminal

    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