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WO2018221188A1 - Dispositif d'antenne embarqué - Google Patents

Dispositif d'antenne embarqué Download PDF

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Publication number
WO2018221188A1
WO2018221188A1 PCT/JP2018/018586 JP2018018586W WO2018221188A1 WO 2018221188 A1 WO2018221188 A1 WO 2018221188A1 JP 2018018586 W JP2018018586 W JP 2018018586W WO 2018221188 A1 WO2018221188 A1 WO 2018221188A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
antenna
switching
antenna element
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.)
Ceased
Application number
PCT/JP2018/018586
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English (en)
Japanese (ja)
Inventor
石河　伸一
晴彦 高岡
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.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries 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 Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Publication of WO2018221188A1 publication Critical patent/WO2018221188A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Definitions

  • the present invention relates to a vehicle-mounted antenna device.
  • This application claims priority based on Japanese Patent Application No. 2017-108283 filed on May 31, 2017, and incorporates all descriptions described in the above Japanese application.
  • vehicle communication systems used for keyless entry systems or smart entry (registered trademark) systems have been proposed.
  • a portable device carried by an occupant and a vehicle-mounted control device that controls locking and unlocking of a vehicle door perform wireless communication to lock and unlock the vehicle door.
  • the portable device and the vehicle-mounted control device are each provided with a vehicle-mounted antenna device for wireless communication using radio waves. Since the in-vehicle antenna device has a polarization directivity of either horizontal polarization or vertical polarization, the communicable distance varies depending on the relative relationship between the direction and the inclination of each in-vehicle antenna device.
  • the portable device (portable communication device) described in Patent Document 1 includes an antenna that can switch polarization to horizontal polarization or vertical polarization, and the operation time to the portable device has a predetermined value. If the wireless communication is not established even if it exceeds, the antenna polarization is switched.
  • An in-vehicle antenna device is an in-vehicle antenna device provided with a plurality of antenna elements, the receiving unit receiving radio signals via the plurality of antenna elements, the plurality of antenna elements, A switching unit which is interposed between the receiving unit and switches to any one of the plurality of antenna elements connected to the receiving unit, and one antenna element among the plurality of antenna elements
  • the direction of the dip due to the horizontal polarization directivity is different from the direction of the dip due to the horizontal polarization directivity of at least one other antenna element, and the respective antenna elements are arranged.
  • An object of the present disclosure is to provide a vehicle-mounted antenna device that can ensure a communicable distance with a simple configuration even with an antenna having a dip.
  • An in-vehicle antenna device is an in-vehicle antenna device provided with a plurality of antenna elements, the receiving unit receiving a radio signal via the plurality of antenna elements; A switching unit that is interposed between the antenna element and the receiving unit and switches to any one of the plurality of antenna elements connected to the receiving unit; The direction of the dip due to the horizontal polarization directivity of the antenna element is different from the direction of the dip due to the horizontal polarization directivity of at least one other antenna element, and the respective antenna elements are arranged.
  • the connection between the plurality of antenna elements and the receiving unit is switched by the switching unit.
  • the direction of the dip due to the horizontal polarization directivity of one antenna element is different from the direction of the dip due to the horizontal polarization directivity of the other antenna elements.
  • the insensitive areas due to each dip are not overlapped. Therefore, the dead area of one antenna element can be supplemented by another antenna element, and the communication possible distance can be prevented from being shortened due to the influence of dip.
  • a board on which the respective antenna elements, the switching section, and the receiving section are mounted is provided, and each of the antenna elements is disposed along one surface of the board apart from the board.
  • the structure which faces the part toward the outside is preferable.
  • each antenna element, switching unit, and receiving unit are mounted on a substrate.
  • Each antenna element includes an L-shaped L-shaped waveguide portion, and is opposed to each corner portion of the L-shaped waveguide portion. Therefore, it is possible to arrange the antenna elements by changing the direction of dip depending on the horizontal polarization directivity of each antenna element with a simple configuration.
  • the L-shaped waveguide part of each antenna element has a long side part and a short side part via the corner part, and the switching part and the receiving part are respectively the L-shaped waveguide part. It is preferable that the long side portions are arranged side by side along the longitudinal direction of the long side portions.
  • the switching unit and the receiving unit are arranged in parallel along the longitudinal direction of the long side portion between the long side portions of the L-shaped waveguide portions of the antenna elements, thereby
  • the conductor pattern for electrically connecting the antenna element and the antenna element can be shortened, and the mounting area on the substrate can be reduced.
  • the control unit includes a communication unit that is communicably connected to the reception unit and the switching unit. Switching by the switching unit is performed in a predetermined cycle, and the reception unit receives signals via the plurality of antenna elements.
  • the signal strength of the radio signal is output to the control unit, and when the signal strength is output, the control unit selects one of the antenna elements based on the signal strength, and sends the selected antenna element to the selected antenna element. It is preferable that a control signal for switching is output to the switching unit, and the switching unit stops switching of the predetermined period and switches the connection with the receiving unit to the selected antenna element.
  • the control unit selects one of the antenna elements based on the signal strength of the radio signal from the plurality of antenna elements received by the receiving unit. And a control part outputs the control signal for switching an antenna element to a switching part so that a receiving part and the selected antenna element may be connected.
  • the switching unit stops the switching performed at a predetermined cycle, and switches the connection with the receiving unit to the selected antenna element. Since the antenna element connected to the receiving unit is selected based on the signal strength, a suitable antenna element can be used to complement the insensitive area due to the dip and secure a communicable distance.
  • the predetermined period is equal to or shorter than a time obtained by dividing a time for receiving a preamble portion of the radio signal by the number of the plurality of antenna elements.
  • the switching period of the antenna element by the switching unit is equal to or shorter than the time obtained by dividing the time for receiving the preamble part of the radio signal by the number of the plurality of antenna elements. Therefore, when receiving the preamble part, it is possible to acquire the signal strengths of the radio signals respectively received by the plurality of antenna elements.
  • FIG. 1 is a schematic diagram illustrating a configuration of an in-vehicle antenna device 4 according to the embodiment.
  • FIG. 2 is a block diagram illustrating a configuration of the in-vehicle antenna device 4 according to the embodiment.
  • the in-vehicle antenna device 4 according to the present embodiment is configured as a part of the in-vehicle control device 1 mounted on the vehicle C.
  • the wireless communication system 2 is configured by the in-vehicle antenna device 4 and the portable device 3 that can be taken out of the vehicle C.
  • the vehicle-mounted control device 1 is a device that integrally controls the body-based vehicle-mounted devices or actuators of the vehicle C such as a BCM (Body Control Module).
  • the in-vehicle control device 1 includes an in-vehicle antenna device 4, a control unit 5, and a storage unit 6.
  • the control unit 5 also controls the in-vehicle antenna device 4.
  • the control unit 5 is configured by a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) and the like, and by reading and executing a later-described control program 7P and data stored in the storage unit 6 in various ways, Control processing, arithmetic processing, and the like are performed, and an aging unit is further provided.
  • a CPU Central Processing Unit
  • MPU Micro Processing Unit
  • the storage unit 6 is composed of a non-volatile memory element such as a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or a flash memory, and stores a control program 7P and data to be referred to during processing. .
  • the control program 7P stored in the storage unit 6 may describe the control program 7P read from the recording medium 7 that can be read by the in-vehicle control device 1. Alternatively, the control program 7P may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 6.
  • the in-vehicle control device 1 includes an in-vehicle LAN interface 9, an input / output unit 10, and a transmission unit 8.
  • the control unit 5 is provided with in-vehicle equipment such as a wiper mechanism 11, a door lock mechanism 12, a door mirror mechanism 13, an interior lamp 14 and a hazard lamp 15 via the input / output unit 10.
  • the control unit 5 is connected to the in-vehicle LAN via the in-vehicle LAN interface 9 using a communication protocol such as CAN (Control Area Network), LIN (Local Interconnect Network), or Ethernet (registered trademark). Communicates with an ECU (not shown).
  • the transmission unit 8 outputs a radio signal to the portable device 3 or various in-vehicle facilities based on the control signal output from the control unit 5.
  • the radio signal output from the transmission unit 8 uses radio waves (LF waves) in the LF (Low Frequency) band.
  • the portable device 3 is carried by an occupant of the vehicle C and transmits a radio signal based on the operation of the occupant.
  • the portable device 3 is used in a so-called keyless entry system or smart entry system, and is called by a name such as a wireless key or a remote control key.
  • the radio signal transmitted by the portable device 3 uses radio waves (RF waves) in the UHF (Ultra High Frequency) band.
  • the radio signal transmitted from the portable device 3 is received by the in-vehicle antenna device 4.
  • the data stream of the radio signal transmitted from the portable device 3 is composed of a preamble part (data preamble), a command code, a check bit, and a rolling code for ensuring the security of the vehicle C in order from the top.
  • the data stream has a fixed length, and the preamble portion has a data length of about 100 bits.
  • the transmission bit time (bit rate) of the data stream is transmitted between several Kbps and 20 Kbps.
  • the portable device 3 receives a radio signal transmitted from the transmission unit 8 of the in-vehicle control device 1.
  • the radio signal transmitted from the transmission unit 8 of the in-vehicle controller 1 uses radio waves (LF waves) in the LF (Low (Frequency) band.
  • the in-vehicle antenna device 4 includes two antenna elements 42, a receiving unit 44, a switching unit 43, and a control unit 5.
  • the in-vehicle antenna device 4 receives and demodulates the radio signal (RF wave) transmitted from the portable device 3 and outputs it to the control unit 5.
  • the two antenna elements 42 have horizontal polarization directivity. As will be described later, the two antenna elements 42 are arranged so that the directions of the dip 21 due to the horizontal polarization directivity are different from each other so that the insensitive regions 22 of the dip 21 do not overlap each other.
  • the receiving unit 44 receives the radio signal received from the antenna element 42, performs a synchronization process in the preamble unit, performs a demodulation process such as a command code, and outputs it to the control unit 5. Further, the receiving unit 44 derives an RSSI (Received / Signal / Strength / Indicator) signal strength (hereinafter, signal strength) of the received radio signal, and outputs it to the control unit 5.
  • RSSI Receiveived / Signal / Strength / Indicator
  • the switching unit 43 is interposed between the receiving unit 44 and the two antenna elements 42 and performs switching to any one of the antenna elements 42 connected to the receiving unit 44 in a predetermined cycle.
  • the predetermined period is set according to the transmission bit time of the radio signal transmitted from the portable device 3. For example, when the predetermined period of switching is set by the time for acquiring 5 bits in the preamble part, if the bit time is 2 kbps, the switching part 43 switches the antenna element 42 at intervals of 2.5 milliseconds.
  • the predetermined period is 50 bits, which is a value obtained by dividing the data length of the preamble part by the number of antenna elements 42 to be switched. You may set to the value below the time to do. In this case, the predetermined period is 25 milliseconds or less.
  • the control unit 5 is communicably connected to the receiving unit 44 and the switching unit 43.
  • the control unit 5 compares the signal strengths of the respective antenna elements 42 output from the receiving unit 44. Then, the antenna element 42 having a high signal strength is selected, and a control signal for switching to the antenna element 42 is output to the switching unit 43.
  • the switching unit 43 to which the control signal from the control unit 5 is input stops switching at a predetermined period, performs switching to the antenna element 42 having a strong signal strength based on the control signal, and the antenna element having a strong signal strength.
  • the connection between 42 and the receiving unit 44 is maintained. Therefore, the receiving unit 44 can ensure a stable reception state by the antenna element 42 having a high signal strength.
  • FIG. 3 is a schematic diagram showing the configuration of the in-vehicle antenna device 4.
  • 4A, 4B, and 4C are explanatory diagrams regarding antenna directivity.
  • the in-vehicle antenna device 4 includes a rectangular substrate 41, and two antenna elements 42, a receiving unit 44, and a switching unit 43 are mounted on one surface of the substrate 41. Further, the control unit 5 is mounted on one surface of the substrate 41, and the control unit 5 is electrically connected to the receiving unit 44 and the switching unit 43 by the conductor pattern 45.
  • Each antenna element 42 includes an L-shaped L-shaped waveguide portion 42 a that is disposed along one surface of the substrate 41 and is spaced from the substrate 41, and the L-shaped waveguide portion 42 a and the substrate 41 that protrude from the substrate 41.
  • the L-shaped waveguide part 42a has a long side part and a short side part via a corner part. The angle of the corner is not limited to 90 °, and may be an acute angle or an obtuse angle.
  • Each antenna element 42 is mounted on the substrate 41 so as to be opposed to each other with the corners of the L-shaped waveguide 42a facing outward and the short sides facing each other in the same direction. It is.
  • the corner portions of the respective antenna elements 42 are aligned with the corner portions of the substrate 41, and the respective antenna elements 42 are mounted with the L-shaped outer edge along the peripheral edge of the substrate 41.
  • each L-shaped waveguide 42a the switching unit 43, the receiving unit 44, and the control unit 5 are arranged in this order along the longitudinal direction of the long side portion of each L-shaped waveguide 42a. It is. Therefore, the conductor pattern 45 that connects the switching unit 43 and each antenna element 42 can be shortened. Further, the area for mounting the antenna element 42, the receiving unit 44, the switching unit 43, and the control unit 5 on the substrate 41 can be reduced.
  • the antenna element 42 receives a radio signal from the portable device 3.
  • the radio signal from the portable device 3 uses a radio wave (RF wave) of UHF (Ultra High Frequency) band.
  • the antenna element 42 has horizontal polarization directivity.
  • the horizontal polarization directivity is a characteristic in which signal intensity (electric field intensity) representing reception sensitivity is distributed horizontally, and the antenna directivity, that is, the sensing region 20 is horizontal.
  • the dip 21 is a point where when the communication distance changes, the signal level of the communication radio wave suddenly drops and communication may become impossible.
  • the insensitive area 22 is generated so that the sensing area 20 of each antenna element 42 is lost by the dip 21.
  • the direction of the dip 21 of another antenna element 42 shown in FIG. 4B is different from the direction of the dip 21 of one antenna element 42 shown in FIG. 4A.
  • the direction of the dip 21 is a direction from the antenna element 42 located at the center of the circle.
  • the direction of the dip 21 of one antenna element 42 is approximately 290 °, and the dip 21 of the other antenna element 42 is.
  • the direction of is approximately 70 °.
  • the direction in which the dip 21 of each antenna element 42 is generated is shifted by approximately 220 ° in the horizontal direction so that the insensitive area 22 by each dip 21 does not overlap.
  • each antenna element 42 is opposed to each other with the corners of the L-shaped waveguides 42a of the two antenna elements 42 facing outward and the short sides facing in the same direction.
  • the direction of each dip 21 can be made different so that the insensitive areas 22 do not overlap each other.
  • the antenna elements 42 having different-shaped waveguide portions may be used so that the directions of the respective dip 21 are different so that the insensitive areas 22 do not overlap each other.
  • the sensing area 20 of one antenna element 42 is indicated by a broken line, and the sensing area 20 of the other antenna element 42 is indicated by a one-dot chain line.
  • the vehicle-mounted antenna device 4 is mounted on the vehicle C so that the directions of the dip 21 of the two antenna elements 42 are different and the insensitive areas 22 do not overlap each other.
  • the dead area 22 of one antenna element 42 can be supplemented by the sensing area 20 of another antenna element 42. Further, the dead area 22 of the other antenna element 42 can be supplemented by the sensing area 20 of the one antenna element 42.
  • the insensitive area 22 of each antenna element 42 can be complemented. Therefore, it is possible to suppress a communicable distance from being shortened due to the influence of the dip 21 and secure a communicable area.
  • Both antenna elements 42 have horizontal polarization directivity, and the same receiving unit 44 can be shared by switching each antenna element 42 and receiving unit 44 via the switching unit 43. Therefore, it is unnecessary to provide a plurality of receiving units corresponding to different polarization directivities. Note that the number of antenna elements 42 is not limited to two, and may be three or more.
  • FIG. 5 is a flowchart showing a processing procedure according to the embodiment.
  • the control unit 5 of the in-vehicle antenna device 4 constantly executes the processing procedure shown below.
  • Control unit 5 waits for a predetermined period of time for a radio signal received from one antenna element 42.
  • the control unit 5 acquires the signal strength of the radio signal via the reception unit 44 (step S11).
  • the control unit 5 stores the acquired signal strength and information for specifying one antenna element 42 in the storage unit 6.
  • the control unit 5 outputs a switching signal for switching the antenna element 42 to the switching unit 43 after a predetermined period has elapsed (step S12).
  • the switching unit 43 performs switching from one antenna element 42 to another antenna element 42 based on the switching signal.
  • Control unit 5 waits for a predetermined period of time for a radio signal received from another antenna element 42.
  • the control unit 5 acquires the signal strength of the radio signal via the reception unit 44 (step S13).
  • the control unit 5 stores the acquired signal strength and information for specifying the other antenna element 42 in the storage unit 6.
  • the control unit 5 acquires a radio signal from each antenna element 42 and determines whether the signal strength of any one of the radio signals has been acquired (step S14).
  • step S14 If neither signal intensity can be acquired (step S14: NO), the control unit 5 outputs a switching signal for switching the antenna element 42 to the switching unit 43 (step S141).
  • the switching unit 43 performs switching from another antenna element 42 to one antenna element 42 based on the switching signal. And the control part 5 returns to the process of step S11.
  • the control unit 5 performs a loop process for continuing the control of switching the antenna element 42 at a predetermined period until the signal strength of the radio signal by any one of the antenna elements 42 can be acquired.
  • the switching unit 43 switches the antenna element 42 based on the switching signal from the control unit 5, but the switching unit 43 includes a time-lapse unit and performs switching at a predetermined cycle. It may be done independently.
  • the control unit 5 identifies the antenna element 42 connected to the receiving unit 44 in synchronization with a predetermined cycle of switching by the switching unit 43.
  • the predetermined period is set to a time equal to or shorter than a value obtained by dividing the time for receiving the preamble part included in the data stream of the radio signal by the antenna element 42 to be switched. For example, when the preamble part has a data length of 100 bits and there are two antenna elements 42 to be switched, the time for acquiring 50 bits of data is set as a predetermined period. The control unit 5 can acquire the signal strength of each of the antenna elements 42 within the time for receiving the preamble part. The predetermined period may be further shortened. For example, when the time for acquiring 10-bit data is set as a predetermined period, the time for acquiring the signal strengths of the two antenna elements 42 can be set as the time for acquiring 20-bit data. Therefore, the remaining 80 bits of the preamble part can be used to establish synchronization.
  • the control unit 5 compares the signal strengths to determine which antenna element 42 has the strong signal strength of the radio signal. (Step S15).
  • RSSI Received Signal Strength Indicator
  • the unit of the signal strength is expressed by mW or dbm, so that the magnitude relationship of each signal strength can be compared by arithmetic operation.
  • the signal intensities for example, only the signal intensity of one antenna element 42 can be acquired. This means that the portable device 3 that has started the wireless signal is located in the dead area 22 due to the dip 21 of the other antenna element 42. Therefore, the insensitive area 22 by the dip 21 of each antenna element 42 can be complemented to ensure a communication distance.
  • the signal strength of one antenna element 42 can be acquired and the signal strength of another antenna element 42 cannot be acquired, the signal strength of one antenna element 42 is stronger than the signal strength of the other antenna element 42. Needless to say, it is determined to be (large).
  • step S15 when the signal strength by one antenna element 42 is stronger than the other antenna elements 42 (step S15: YES), the control unit 5 controls the control signal to switch to one antenna element 42. Is output to the switching unit 43 (step S16).
  • the switching unit 43 performs switching to one antenna element 42 based on the control signal, and the receiving unit 44 and the one antenna element 42 are connected.
  • step S16 when the process of step S16 is already performed, if the state is already switched to one antenna element 42, the control unit 5 does not output a control signal, and the reception unit 44 and the one antenna element 42 are not output. May be maintained in a connected state.
  • step S15 when the signal strength by one antenna element 42 is weaker than the other antenna elements 42 (step S15: NO), the control unit 5 controls the control signal to switch to the other antenna element 42. Is output to the switching unit 43 (step S161).
  • the switching unit 43 performs switching to another antenna element 42 based on the control signal, and the receiving unit 44 and the other antenna element 42 are connected.
  • the receiving unit 44 receives the radio signal from the portable device 3 and receives it after the preamble unit while the connection between the receiving unit 44 and the antenna element 42 having high signal strength is maintained.
  • the received command code is demodulated and output to the control unit 5 (step S17).
  • the control unit 5 Based on the command code, the control unit 5 outputs control signals to on-vehicle equipment such as the door lock mechanism 12, the door mirror mechanism 13, the interior lamp 14, and the hazard lamp 15 via the input / output unit 10 (step S18).
  • the control unit 5 When the reception of the radio signal is completed, the control unit 5 returns to the process of step S11 at the top of the flowchart, and resumes the process of waiting for the radio signal received from one antenna element 42 for a predetermined period (step S11). . Or when the state which cannot receive a radio signal continues more than predetermined time, the control part 5 considers that reception of a radio signal was completed, and may return to the process of step S11.
  • the control unit 5 resumes the waiting process (step S11) the switching of the antenna element 42 in the predetermined cycle by the switching unit 43 is resumed.
  • the control unit 5 returns to the process of step S11 after the reception of the radio signal is completed.
  • the present invention is not limited to this.
  • the control unit 5 may end the process and generate a new process for performing the process of step S11.
  • the dead area 22 due to the dip 21 of each antenna element 42 is mutually complemented, the communication distance is ensured, and the antenna element 42 with strong signal strength is used. A radio signal can be stably received.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne un dispositif d'antenne embarqué auquel sont fournis une pluralité d'éléments d'antenne qui est pourvu : d'une unité de réception qui reçoit un signal sans fil par l'intermédiaire des éléments d'antenne ; et d'une unité de commutation qui est interposée entre l'unité de réception et les éléments d'antenne et effectue une commutation vers un des éléments d'antenne à relier à l'unité de réception, les éléments d'antenne respectifs étant agencés de sorte que la direction d'immersion sur la base de la directivité d'onde polarisée horizontalement d'un des éléments d'antenne soit différente de la direction d'immersion sur la base de la directivité d'onde polarisée horizontalement d'au moins un autre des éléments d'antenne.
PCT/JP2018/018586 2017-05-31 2018-05-14 Dispositif d'antenne embarqué Ceased WO2018221188A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017108283A JP2018207228A (ja) 2017-05-31 2017-05-31 車載アンテナ装置
JP2017-108283 2017-05-31

Publications (1)

Publication Number Publication Date
WO2018221188A1 true WO2018221188A1 (fr) 2018-12-06

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Application Number Title Priority Date Filing Date
PCT/JP2018/018586 Ceased WO2018221188A1 (fr) 2017-05-31 2018-05-14 Dispositif d'antenne embarqué

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WO (1) WO2018221188A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006128950A (ja) * 2004-10-27 2006-05-18 Nippon Dempa Kogyo Co Ltd 高周波無線機の制御方法及び高周波無線機システム
JP2009060169A (ja) * 2007-08-29 2009-03-19 Toshiba Corp アンテナ装置および信号受信方法
WO2010095356A1 (fr) * 2009-02-18 2010-08-26 パナソニック株式会社 Récepteur de télévision
JP2014175686A (ja) * 2013-03-06 2014-09-22 Honda Motor Co Ltd 車両用受信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006128950A (ja) * 2004-10-27 2006-05-18 Nippon Dempa Kogyo Co Ltd 高周波無線機の制御方法及び高周波無線機システム
JP2009060169A (ja) * 2007-08-29 2009-03-19 Toshiba Corp アンテナ装置および信号受信方法
WO2010095356A1 (fr) * 2009-02-18 2010-08-26 パナソニック株式会社 Récepteur de télévision
JP2014175686A (ja) * 2013-03-06 2014-09-22 Honda Motor Co Ltd 車両用受信装置

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