WO2012147817A1 - Electronic instrument - Google Patents

Electronic instrument Download PDF

Info

Publication number
WO2012147817A1
WO2012147817A1 PCT/JP2012/061139 JP2012061139W WO2012147817A1 WO 2012147817 A1 WO2012147817 A1 WO 2012147817A1 JP 2012061139 W JP2012061139 W JP 2012061139W WO 2012147817 A1 WO2012147817 A1 WO 2012147817A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic device
antenna element
case
display device
disposed
Prior art date
Application number
PCT/JP2012/061139
Other languages
French (fr)
Japanese (ja)
Inventor
河原　秀規
Original Assignee
株式会社Ｊｖｃケンウッド
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 株式会社Ｊｖｃケンウッド filed Critical 株式会社Ｊｖｃケンウッド
Publication of WO2012147817A1 publication Critical patent/WO2012147817A1/en

Links

Images

Classifications

    • 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
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to an electronic device having an antenna.
  • antennas having parasitic elements are used (parasitic elements) (see, for example, Patent Documents 1 and 2).
  • the parasitic element is arranged so as to be separated from the radiating element (parasitic element) connected to the feeder line by an electrical length of 1 ⁇ 4 wavelength of the operating frequency.
  • the parasitic element functions as a director or a resonator, and contributes to improvement of the directivity pattern of the antenna, higher gain, or wider bandwidth.
  • the electronic device may continuously perform transmission and reception while being placed in the bag.
  • an electronic device may be required to continuously receive radio waves from a GPS (Global Positioning System) satellite regardless of which direction the electronic device is facing.
  • An antenna mounted on such an electronic device is required to have a directivity pattern with little directivity.
  • an antenna When disposing a radiating element on a printed circuit board, an antenna may be formed using a printed wiring pattern, but the use of a chip antenna is effective for reducing the mounting area.
  • a chip antenna is an antenna product that is modularized so that it can be mounted on the surface of a printed circuit board.
  • the chip antenna is small by using a material with a large relative permittivity and relative permeability (that is, a large wavelength shortening effect) as a base material. Sizing is planned.
  • a printed circuit board is generally disposed at a position facing the back surface of the display device.
  • the back and side surfaces of the display device are covered with a metal shielding case.
  • the shield case of the display device functions as an antenna (waveguide or reflector) and the electric field radiated from the shield case becomes relatively strong.
  • the electric field radiated in the direction where the shield case does not exist is relatively weak.
  • the ground wiring pattern provided on the printed circuit board also functions as an antenna and affects the directivity pattern.
  • the present invention has been made on the basis of the above-described examination by the inventors of the present application.
  • an antenna radiatating element
  • a directivity pattern is formed. The purpose is to improve.
  • the electronic apparatus includes a case, a display device, a circuit board, and first and second antenna elements.
  • the case has an opening.
  • the display device is disposed in the case and has a display surface visible from the outside through the opening and a back surface covered with a conductive shield material.
  • the circuit board is disposed in the case so as to face the back surface of the display device, and an electronic component including a wireless communication circuit is mounted thereon.
  • the first antenna element is disposed on the circuit board so as to be positioned in a frame region that does not overlap the display device when viewed from a front side of the electronic device perpendicular to the display surface, and the wireless communication circuit And are connected by a feeder line.
  • the second antenna element is at least partially located in the frame region when viewed from the front side, and at least part of the second antenna element when viewed from the side of the electronic device.
  • the parasitic element is a parasitic element arranged so as to be located on the display surface side from the back surface.
  • the first antenna element has an elongated shape, and the at least part of the second antenna element is substantially parallel to a longitudinal direction of the first antenna element. May be arranged.
  • the frame region may have four sides surrounding the opening.
  • the second antenna element may have an L-shape and may be disposed across two adjacent sides of the frame region when viewed from the front side.
  • the second antenna element may be provided in contact with the outer surface of the case.
  • the case may include a frame member surrounding the opening.
  • the at least part of the second antenna element may be provided in contact with a portion of the frame member that is located outside the first antenna element when viewed from the front side.
  • the second antenna element may be a conductive film attached to the case.
  • the electronic device may further include a dielectric cover member that covers at least a portion of the case where the second antenna element is provided.
  • the first antenna element may be disposed on a surface of the two main surfaces of the circuit board that does not face the display device.
  • an interval between the first antenna element and the second antenna element is preferably an electrical length of 1 ⁇ 4 wavelength or less at a use frequency.
  • the length of the second antenna element in the longitudinal direction may be an electrical length of 1 ⁇ 2 wavelength or less at the use frequency.
  • the directivity pattern can be improved when an antenna (radiating element) is disposed on a circuit board positioned opposite to the back surface of the display device.
  • FIG. 1 is a block diagram illustrating a functional configuration example of the electronic apparatus according to the first embodiment.
  • FIG. 2 is a projection view illustrating an external configuration example of the electronic apparatus according to the first embodiment.
  • 3A is a front perspective view of the electronic apparatus according to Embodiment 1.
  • FIG. 3B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 1.
  • FIG. 4 is a perspective view illustrating an external configuration example of the electronic apparatus according to the first embodiment.
  • FIG. 5A is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 1.
  • FIG. 5B is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1.
  • 5C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1.
  • 6A is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic apparatus according to Embodiment 1.
  • FIG. 6B is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1.
  • FIG. 6C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1.
  • FIG. FIG. 7A is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 7B is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 7C is a diagram illustrating a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 8A is a diagram illustrating a measurement result of antenna directivity (yz plane) of an electronic device according to a comparative example.
  • FIG. 8B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 8C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 8A is a diagram illustrating a measurement result of antenna directivity (yz plane) of an electronic device according to a comparative example.
  • FIG. 8B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 9A is a diagram illustrating a measurement result of antenna directivity (zx plane) of an electronic device according to a comparative example.
  • FIG. 9B is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example.
  • FIG. 9C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example.
  • FIG. 10A is a diagram illustrating a measurement result of antenna directivity (xy plane) of an electronic device according to a comparative example.
  • FIG. 10B is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example.
  • FIG. 10A is a diagram illustrating a measurement result of antenna directivity (xy plane) of an electronic device according to a comparative example.
  • FIG. 10B is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example
  • FIG. 10C is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example.
  • FIG. 11A is a front perspective view of the electronic apparatus according to Embodiment 2.
  • FIG. 11B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 2.
  • 12A is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 2.
  • FIG. FIG. 12B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 2.
  • FIG. 13A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 13B is a side perspective view of an electronic apparatus according to another embodiment.
  • FIG. 14A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 14B is a side perspective view of an electronic apparatus according to another embodiment.
  • FIG. 15A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 15B is a cross-sectional perspective view of an electronic apparatus according to another embodiment.
  • FIG. 16A is a front perspective view of an electronic device according to another embodiment.
  • FIG. 16B is a side perspective view of an electronic apparatus according to another embodiment.
  • the electronic device 1 is a portable electronic device having a wireless communication circuit.
  • the electronic device 1 is, for example, a smartphone or a tablet PC.
  • FIG. 1 is a block diagram illustrating a functional configuration example of the electronic device 1.
  • the wireless communication circuit 11 is a wireless transmitter, a wireless receiver, or a wireless transceiver. That is, the wireless communication circuit 11 performs protocol processing and signal processing related to wireless communication, and performs at least one of transmission and reception of a wireless signal using the antenna 10.
  • the wireless communication circuit 11 is, for example, a GPS receiver chip or a wireless LAN (Local Area Network) chip.
  • the display device 12 has a display surface capable of displaying an image.
  • Specific examples of the display device 12 include an LCD (Liquid Crystal Display) and an organic EL (Electroluminescence) display.
  • the display device 12 has a structure in which a display panel (eg, a liquid crystal panel or an organic EL panel) and a circuit board on which semiconductor electronic components including a driver for driving the display panel are mounted are accommodated in a conductive shield case. . That is, the back surface facing the display surface of the display device 12 and the side surface of the display device 12 are covered with the conductive shield material.
  • the input device 13 is a device for accepting a user operation on the electronic device 1. Specific examples of the input device 13 include operation buttons and switches having physical entities, a touch panel, a microphone, and a camera. When the input device 13 is a touch panel, the touch panel is integrally disposed on the display surface of the display device 12.
  • the microprocessor 14 executes an OS (Operating System) and application programs, and performs overall control of the electronic device 1 and provision of functions desired by the user.
  • the OS and application program are loaded from a ROM (Read Only Memory) 16 or a flash memory 17 into a RAM (Random Access Memory) 15.
  • the microprocessor 14 executes a program loaded on the RAM 15.
  • the above-described semiconductor electronic components including the wireless communication circuit 11, the microprocessor 14, the RAM 15, the ROM 16, and the flash memory 17 may be integrally disposed on one printed wiring board or on a plurality of printed wiring boards. It may be distributed.
  • FIGS. 2A to 2C are projection views showing an example of the external configuration of the electronic apparatus 1.
  • FIG. FIG. 2A is a front view of the display device 12 as viewed from the display surface 120 side.
  • 2B is a left side view
  • FIG. 2C is a top view.
  • the three buttons 130 shown in FIG. 2 are specific examples of the input device 13.
  • the case 2 has an opening 20 and frame members 21 to 24 surrounding the opening 20.
  • the case 2 is made of, for example, a synthetic resin or a carbon fiber reinforced resin.
  • a cavity having an opening 20 is formed by the frame members 21 to 24.
  • a circuit board on which semiconductor devices including the display device 12 and the wireless communication circuit 11 are mounted is disposed.
  • the display device 12 is disposed in the cavity of the case 2 so that the display surface 120 can be visually recognized from the outside through the opening 20.
  • the display surface 120 may be protected by a front panel (not shown) formed of glass or synthetic resin that transmits visible light.
  • a circuit board on which semiconductor electronic components including the wireless communication circuit 11 are mounted is disposed in the cavity of the case 2 so as to face the back surface of the display device 12.
  • the antenna 10 includes a radiating element (feeding element) 101 and a parasitic element 102 without feeding.
  • the radiating element 101 is disposed on a printed circuit board on which the wireless communication circuit 11 is mounted.
  • the radiating element 101 may be a chip antenna mounted on the surface of the circuit board, or an antenna pattern formed on the circuit board by printed wiring.
  • the radiating element 101 is connected to the wireless communication circuit 11 arranged on the circuit board by a feeder line formed by a pattern on the board.
  • the polarization characteristics of the radiating element 101 may be linearly polarized waves or circularly polarized waves. *
  • the parasitic element 102 is disposed away from the radiating element 101.
  • the parasitic element 102 may be a thin plate (for example, a sheet metal) or a film (for example, a metal tape having a thin metal and a paste) formed of a conductive material such as metal. What is necessary is just to adjust suitably the space
  • the distance between the radiating element 101 and the parasitic element 102 may be set to an electrical length of 1 ⁇ 4 wavelength of the use frequency or less so that the parasitic element 102 effectively functions as a director.
  • FIG. 3A and 3B are diagrams illustrating a specific example of the arrangement of the radiating element 101 and the parasitic element 102.
  • FIG. 3A is a perspective view seen from the front direction of the electronic apparatus 1.
  • the case 2, the display device 12, and the button 130 are indicated by broken lines, and the circuit board 3, the radiating element 101, and the parasitic element 102 located below the case 2 and the display device 12 are illustrated.
  • FIG. 3B is a cross-sectional perspective view showing the inside of the cavity when the case 2 is cut along the cutting line I in FIG.
  • illustration of case 2 is abbreviate
  • the shield case 121 shown in FIG. 3B is a conductive shield material that covers the side surface and the back surface of the display device 12 to prevent noise.
  • the circuit board 3 is a printed circuit board on which semiconductor electronic components including a wireless communication circuit 11 and a microcontroller are mounted.
  • the radiating element 101 is disposed on the circuit board 3 and is connected to the wireless communication circuit 11 by the feeder line 30.
  • the radiating element 101 is a chip antenna that is surface-mounted on the circuit board 3.
  • the radiating element 101 is arranged in a frame region that does not overlap the display device 12 when viewed from the front side of the electronic device 1 perpendicular to the display surface 120. Specifically, the radiating element 101 is located below the frame member 21 located on the left side of the sheet of FIG.
  • the parasitic element 102 is at least partially disposed in a frame region (that is, a region that does not overlap the display device 12 when viewed from the front side). Further, as is apparent from FIG. 3B, the parasitic element 102 is at least partially above the rear surface covered with the shield case 121 of the display device 12 when viewed from the side surface side of the electronic device 1. It arrange
  • the radiating element 101 and the parasitic element 102 are arranged in the frame region, the distance between the radiating element 101 and the parasitic element 102 and the shield case 121 can be increased. For this reason, it can suppress that the shield case 121 operate
  • the parasitic element 102 is disposed on the display surface 120 side above the back surface of the display device 12. For this reason, the parasitic element 102 functioning as a director can efficiently radiate an electric field toward the left side in FIG. 3A. Therefore, the electronic device 1 can obtain a uniform directivity pattern including the front surface, the side surface, and the back surface of the electronic device 1 in the left direction in FIG. 3A.
  • the following may be devised to improve the directivity pattern.
  • at least a part of the parasitic element 102 described above may be disposed substantially parallel to the longitudinal direction of the radiating element 101 having an elongated shape.
  • bonding of the radiation element 101 and the parasitic element 102 can be strengthened.
  • substantially parallel means that the coupling between the radiating element 101 and the parasitic element 102 may not be strictly parallel including a certain error range as long as the coupling between the radiating element 101 and the parasitic element 102 can be enhanced.
  • the length of the parasitic element 102 may be about an electrical length 1 ⁇ 2 wavelength of the used frequency.
  • the parasitic element effectively functions as a waveguide when the electrical length of the parasitic element is slightly shorter (approximately 5%) than the 1 ⁇ 2 wavelength. Therefore, the length of the parasitic element 102 according to the present embodiment may be slightly shorter (approximately about 5%) than the electrical length 1 ⁇ 2 wavelength of the operating frequency.
  • the radiating element 101 may be disposed on a surface that does not oppose the back surface of the display device 12 among the two main surfaces of the circuit board 3. Thereby, since the distance between the radiating element 101 and the shield case 121 covering the back surface of the display device 12 can be further increased, the coupling between the radiating element 101 and the shield case 121 can be weakened.
  • the parasitic element 102 may be disposed so as to contact the inside or the outside of the case 2 (that is, the frame member 21). More specifically, the parasitic element 102 may be disposed by attaching a conductive film or a conductive thin plate to the inside or the outside of the case 2 (that is, the frame member 21).
  • FIG. 4 shows a state in which a conductive film is used as the parasitic element 102 and the parasitic element 102 is attached to the outside of the case 2. As shown in FIG. 4, by adopting a form in which a metal tape is affixed to the outside of the case 2 among the parasitic elements 102, workability is improved and fine adjustment of the directivity pattern is facilitated. In addition, as shown in FIG.
  • the thickness of the parasitic element 102 can be suppressed, so that the parasitic element 102 can be arranged in a limited space of the electronic device 1. Furthermore, by using a metal tape, it can be processed into various shapes and can be attached to an uneven surface, so that workability is further improved and fine adjustment of the directivity pattern is easier. Become.
  • the parasitic element 102 When the parasitic element 102 is attached to the outside of the case 2, the parasitic element 102 may be covered with a cover 25 as shown in FIG.
  • the cover 25 is configured to cover at least a portion of the case 2 where the parasitic element 102 is provided. Thereby, damage to the parasitic element 102 can be prevented.
  • the cover 25 may be formed of a dielectric material such as synthetic resin.
  • the measurement result when the antenna 10 is a GPS receiving antenna is shown.
  • the frequency used is 1575.42 MHz corresponding to the GPS signal.
  • the radiating element 101 is a chip antenna having a helical structure with an electrical length of 1 ⁇ 4 wavelength.
  • the parasitic element 102 is a conductive film in which a conductive film is attached to the outside of the frame member 21. Further, a configuration in which the parasitic element 102 is covered with the cover 25 is employed. At present, the half wavelength at the operating frequency is about 95 mm, but the length of the parasitic element 102 is set to 49 mm in order to obtain the wavelength shortening effect by the cover 25 and the conductive film material.
  • 5B and 5C are diagrams showing directivity patterns of the electronic device 1 according to the present embodiment.
  • 5B and 5C show measurement results on the yz plane (see FIG. 5A) that is horizontal to the display surface 120.
  • FIG. 5B shows the measurement result of vertical polarization
  • FIG. 5C shows the measurement result of horizontal polarization.
  • FIGS. 6B and 6C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment.
  • 6B and 6C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 6A).
  • FIG. 6B shows the measurement result of vertical polarization
  • FIG. 6C shows the measurement result of horizontal polarization.
  • 7B and 7C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment.
  • 7B and 7C show the measurement results of the xy plane (see FIG. 7A) perpendicular to the display surface 120.
  • FIG. 7B shows the measurement result of vertical polarization
  • FIG. 7C shows the measurement result of horizontal polarization.
  • FIG. 8B and FIG. 8C are diagrams showing directivity patterns of comparative examples that do not have the parasitic element 102.
  • the comparative example has the same configuration as the electronic device 1 except that the parasitic element 102 is not included.
  • 8B and 8C show the measurement results of the yz plane (see FIG. 8A) that is horizontal with respect to the display surface 120.
  • FIG. 8B shows the measurement result of vertical polarization
  • FIG. 8C shows the measurement result of horizontal polarization.
  • FIG. 9B and FIG. 9C are diagrams showing directivity patterns of comparative examples.
  • 9B and 9C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 9A).
  • FIG. 9B shows the measurement result of vertical polarization
  • FIG. 9C shows the measurement result of horizontal polarization.
  • 10B and 10C are diagrams showing directivity patterns of comparative examples. 10B and 10C show the measurement results of the xy plane (see FIG. 10A) perpendicular to the display surface 120. FIG. FIG. 10B shows the measurement result of vertical polarization, and FIG. 10C shows the measurement result of horizontal polarization.
  • the effect of the parasitic element 102 is remarkable in the measurement result of the horizontal polarization of the yz plane shown in FIG. 5C. Comparing FIG. 5C and FIG. 8C, in FIG. 5C, the gain in the direction from 300 degrees to 0 degrees is improved by about 5 dB. The effect of the parasitic element 102 is also remarkable in the measurement result of the zx-plane vertical polarization shown in FIG. 6B. Comparing FIG. 6B and FIG. 9B, in FIG. 6B, the gains in the 0 to 60 degree direction and the 300 to 0 degree direction are improved by about 4 to 5 dB, and the directivity pattern is improved.
  • FIGS. 11A and 11B are diagrams illustrating specific examples of the arrangement of the radiation element 101 and the parasitic element 102 in the electronic apparatus 4 according to the present embodiment.
  • the parasitic element 102 of the present embodiment has an L shape and is disposed across two adjacent sides of a frame region surrounding the display surface 120 when viewed from the front side. .
  • the parasitic element 102 is disposed across the frame region formed by the frame members 21 and 22 on two adjacent sides.
  • the entire parasitic element 102 does not need to be located in the frame region, and at least a part of the parasitic element 102 may be located in the frame region.
  • FIG. 12B is a diagram showing a directivity pattern of the electronic device 4.
  • FIG. 12B shows the measurement result of the yz plane (see FIG. 12A) that is horizontal to the display surface 120. That is, FIG. 12B corresponds to FIG. 5C of the first embodiment. Comparing FIG. 12B and FIG. 5C, in FIG. 12B, the gain from 300 degrees to 0 degrees is further improved by about 5 dB.
  • the directivity pattern can be further improved by disposing the L-shaped parasitic element 102 across the two sides of the frame region.
  • the L-shaped parasitic element 102 described in this embodiment includes not only a shape bent at a right angle as shown in FIG. 11A but also an element having a bending angle larger than 90 degrees and a small element.
  • the L-shaped parasitic element 102 described in this embodiment includes an element in which a bent portion is curved.
  • FIGS. 13A and 13B show other variations relating to the shape of the parasitic element 102.
  • FIG. The electronic device 5 shown in FIGS. 13A and 13B includes a parasitic element 102 attached on the side surface of the case 2.
  • the electronic device 6 shown in FIGS. 14A and 14B includes an L-shaped parasitic element 102 that is pasted across two adjacent side surfaces of the case 2.
  • the electronic device 7 shown in FIGS. 15A and 15B includes an L-shaped parasitic element 102 that is pasted from the upper surface of the frame member 21 to the side surface of the adjacent frame member 22.
  • 16A and 16B includes an L-shaped parasitic element 102 that is pasted from the side surface of the frame member 21 to the upper surface of the adjacent frame member 22.
  • the electronic device 5 having the linear parasitic element 102 can improve the directivity pattern based on the same principle as the electronic device 1 described in the first embodiment.
  • the electronic devices 6 to 8 having the L-shaped parasitic element 102 can improve the directivity pattern based on the same principle as that of the electronic device 4 described in the second embodiment.
  • a linear shape and an L-shape are shown as specific examples of the shape of the parasitic element 102.
  • the shape of the parasitic element 102 may be other shapes (for example, a meander shape).

Abstract

A display device (12) has: a display face (120) disposed within a case (2) of an electronic instrument (1), and visible from the outside through an opening (20); and a back face that is covered by a conductive shield case (121). A circuit board (3) is disposed within the case (2), so as to face toward the back face of the display device (12). An emitting element (101) is disposed over the circuit board (3), in such a way as to be positioned within a frame area that does not overlap the display device (12) when the electronic instrument (1) is viewed from the front face side, and is connected by a power supply line to a wireless communication circuit (11). A parasitic element (102) is disposed in such a way that at least a portion thereof is positioned in the frame area when the electronic instrument (1) is viewed from the front face side, and positioned to the display face (120) side from the back face of the display device (12) when the electronic instrument (1) is viewed from a side face side.

Description

電子機器Electronics
　本発明は、アンテナを有する電子機器に関する。 The present invention relates to an electronic device having an antenna.
　携帯電話端末及びポータブルコンピュータ等の携帯型の電子機器の分野においても、寄生素子（無給電素子）を有するアンテナを用いることが知られている（例えば特許文献１及び２を参照）。寄生素子は、給電線と接続された放射素子（寄生素子）から使用周波数の電気長１／４波長ほど離間して配置される。寄生素子は、導波器又は共振器として機能し、アンテナの指向性パターンの改善、高利得化、又は広帯域化に寄与する。 Also in the field of portable electronic devices such as mobile phone terminals and portable computers, it is known to use antennas having parasitic elements (parasitic elements) (see, for example, Patent Documents 1 and 2). The parasitic element is arranged so as to be separated from the radiating element (parasitic element) connected to the feeder line by an electrical length of ¼ wavelength of the operating frequency. The parasitic element functions as a director or a resonator, and contributes to improvement of the directivity pattern of the antenna, higher gain, or wider bandwidth.
　携帯型の電子機器の場合、ユーザの持ち方が限定されていないことが多い。また、電子機器は、鞄に入れられている間も送受信を継続的に行う場合がある。例えば、電子機器は、電子機器がどの方向を向いているかに関わらず、ＧＰＳ（Global　Positioning　System）衛星からの電波を継続的に受信することが要求される場合がある。このような電子機器に搭載されるアンテナは、指向性の少ない指向性パターンを持つことが要求される。 In the case of portable electronic devices, the user's way of holding is often not limited. In addition, the electronic device may continuously perform transmission and reception while being placed in the bag. For example, an electronic device may be required to continuously receive radio waves from a GPS (Global Positioning System) satellite regardless of which direction the electronic device is facing. An antenna mounted on such an electronic device is required to have a directivity pattern with little directivity.
　一方で、電子機器のサイズの小型化及び薄型化に伴い、電子機器内にアンテナを配置する際の実装上の制約が増大している。この実装上の制約は、特に、電子機器の主要な表面の大部分がディスプレイデバイスの表示面によって占有されている電子機器、例えばスマートフォン及びタブレットＰＣ、において顕著である。この実装上の制約に対処するために、本願の発明者は、無線通信回路（i.e.　トランスミッタ、レシーバ、又はトランシーバ）及びマイクロプロセッサ等の半導体電子部品が実装されるプリント回路基板上にアンテナの放射素子（給電素子）を配置する構成について検討を行った。 On the other hand, with the reduction in size and thickness of electronic devices, there are increasing restrictions on mounting when an antenna is arranged in the electronic device. This mounting limitation is particularly noticeable in electronic devices such as smartphones and tablet PCs in which most of the main surface of the electronic device is occupied by the display surface of the display device. In order to deal with this mounting limitation, the inventors of the present application have designed a radiating element for an antenna on a printed circuit board on which semiconductor electronic components such as a wireless communication circuit (ie transmitter, receiver, or transceiver) and a microprocessor are mounted. The configuration for arranging the (feeding element) was examined.
　プリント回路基板上に放射素子を配置する場合、プリント配線パターンを利用してアンテナを形成してもよいが、実装面積を小さくするためにはチップアンテナの利用が効果的である。チップアンテナは、プリント回路基板の表面に実装できるようにモジュール化されたアンテナ製品であり、比誘電率及び比透磁率の大きい（つまり波長短縮効果の大きい）素材を基材として利用することで小サイズ化が図られている。 When disposing a radiating element on a printed circuit board, an antenna may be formed using a printed wiring pattern, but the use of a chip antenna is effective for reducing the mounting area. A chip antenna is an antenna product that is modularized so that it can be mounted on the surface of a printed circuit board. The chip antenna is small by using a material with a large relative permittivity and relative permeability (that is, a large wavelength shortening effect) as a base material. Sizing is planned.
　しかしながら、上述したスマートフォン及びタブレットＰＣ等の電子機器においては、ディスプレイデバイスの背面と対向する位置にプリント回路基板が配置されることが一般的である。ディスプレイデバイスの背面及び側面は、金属製のシールドケースによって覆われている。このため、放射素子をプリント回路基板に配置する場合、放射素子から放射された電界がディスプレイデバイスのシールドケースによって歪められてしまい、指向性パターンが劣化する問題が生じることが分かった。 However, in the above-described electronic devices such as smartphones and tablet PCs, a printed circuit board is generally disposed at a position facing the back surface of the display device. The back and side surfaces of the display device are covered with a metal shielding case. For this reason, when arrange | positioning a radiation element to a printed circuit board, it turned out that the electric field radiated | emitted from the radiation element is distorted by the shield case of a display device, and the problem that a directional pattern deteriorates arises.
　この問題は、ディスプレイデバイスのシールドケースがアンテナ（導波器または反射器）として機能し、シールドケースから放射される電界が相対的に強くなるために生じると考えられる。この結果、シールドケースが存在していない方向に向けて放射される電界が相対的に弱くなってしまう。例えば、ＧＰＳ及び無線ＬＡＮ等のギガヘルツ帯又はこれより高周波数帯を用いる場合、ディスプレイデバイスの背面を覆うシールドケースの一辺の長さ又は周囲長は、使用周波数における電気長１／４波長より長くなるため、この問題が発生し得る。さらに、プリント回路基板に設けられたグランド配線パターンもアンテナとして機能し、指向性パターンに影響を与える。 This problem is considered to occur because the shield case of the display device functions as an antenna (waveguide or reflector) and the electric field radiated from the shield case becomes relatively strong. As a result, the electric field radiated in the direction where the shield case does not exist is relatively weak. For example, when using a gigahertz band such as GPS and wireless LAN or a higher frequency band, the length of one side or the perimeter of the shield case covering the back surface of the display device is longer than the electrical length ¼ wavelength at the operating frequency. Therefore, this problem can occur. Furthermore, the ground wiring pattern provided on the printed circuit board also functions as an antenna and affects the directivity pattern.
特開２００３－２４３９１６号公報JP 2003-243916 A 特開２００９－００４８７５号公報JP 2009-004875 A
　本発明は、本願の発明者による上述した検討に基づいてなされたものであって、ディスプレイデバイスの背面に対向して位置する回路基板上にアンテナ（放射素子）を配置する場合に指向性パターンの改善を図ることを目的とする。 The present invention has been made on the basis of the above-described examination by the inventors of the present application. In the case where an antenna (radiating element) is arranged on a circuit board facing the back surface of a display device, a directivity pattern is formed. The purpose is to improve.
　本発明の一態様は、電子機器を含む。当該電子機器は、ケース、ディスプレイデバイス、回路基板、並びに第１及び第２のアンテナ素子を有する。前記ケースは、開口を有する。前記ディスプレイデバイスは、前記ケース内に配置され、前記開口を通じて外部から視認可能な表示面、及び導電性のシールド材で覆われた背面を有する。前記回路基板は、前記ディスプレイデバイスの前記背面に対向するように前記ケース内に配置され、無線通信回路を含む電子部品が実装されている。前記第１のアンテナ素子は、前記表示面に垂直な前記電子機器の正面側から見た場合に前記ディスプレイデバイスと重ならないフレーム領域に位置するように前記回路基板上に配置され、前記無線通信回路と給電線により接続されている。前記第２のアンテナ素子は、前記正面側から見た場合にその少なくとも一部が前記フレーム領域に位置するとともに、前記電子機器の側面側から見た場合に前記少なくとも一部が前記ディスプレイデバイスの前記背面より前記表示面側に位置するように配置された無給電の寄生素子である。 One embodiment of the present invention includes an electronic device. The electronic apparatus includes a case, a display device, a circuit board, and first and second antenna elements. The case has an opening. The display device is disposed in the case and has a display surface visible from the outside through the opening and a back surface covered with a conductive shield material. The circuit board is disposed in the case so as to face the back surface of the display device, and an electronic component including a wireless communication circuit is mounted thereon. The first antenna element is disposed on the circuit board so as to be positioned in a frame region that does not overlap the display device when viewed from a front side of the electronic device perpendicular to the display surface, and the wireless communication circuit And are connected by a feeder line. The second antenna element is at least partially located in the frame region when viewed from the front side, and at least part of the second antenna element when viewed from the side of the electronic device. The parasitic element is a parasitic element arranged so as to be located on the display surface side from the back surface.
　上述した本発明の一態様において、前記第１のアンテナ素子は細長の形状を有し、前記第２のアンテナ素子の前記少なくとも一部は、前記第１のアンテナ素子の長手方向と実質的に平行に配置されてもよい。 In one embodiment of the present invention described above, the first antenna element has an elongated shape, and the at least part of the second antenna element is substantially parallel to a longitudinal direction of the first antenna element. May be arranged.
　上述した本発明の一態様において、前記フレーム領域は、前記開口を囲む４辺を有してもよい。また、前記第２のアンテナ素子は、Ｌ字型の形状を有し、前記正面側から見た場合に前記フレーム領域の隣接する２辺に跨って配置されてもよい。 In the above-described aspect of the present invention, the frame region may have four sides surrounding the opening. The second antenna element may have an L-shape and may be disposed across two adjacent sides of the frame region when viewed from the front side.
　上述した本発明の一態様において、前記第２のアンテナ素子は、前記ケースの外側表面に接して設けられてもよい。 In the above-described aspect of the present invention, the second antenna element may be provided in contact with the outer surface of the case.
　上述した本発明の一態様において、前記ケースは、前記開口を囲むフレーム部材を備えてもよい。また、前記第２のアンテナ素子の前記少なくとも一部は、前記フレーム部材のうち前記正面側から見た場合において前記第１のアンテナ素子より外側に位置する部分に接して設けられてもよい。 In the aspect of the present invention described above, the case may include a frame member surrounding the opening. In addition, the at least part of the second antenna element may be provided in contact with a portion of the frame member that is located outside the first antenna element when viewed from the front side.
　上述した本発明の一態様において、前記第２のアンテナ素子は、前記ケースに貼り付けられた導電性フィルムであってもよい。 In one aspect of the present invention described above, the second antenna element may be a conductive film attached to the case.
　上述した本発明の一態様において、前記電子機器は、前記ケースのうち少なくとも前記第２のアンテナ素子が設けられた部分を覆う誘電性のカバー部材をさらに有してもよい。　　　 In the aspect of the present invention described above, the electronic device may further include a dielectric cover member that covers at least a portion of the case where the second antenna element is provided. *
　上述した本発明の一態様において、前記第１のアンテナ素子は、前記回路基板の２つの主面のうち、前記ディスプレイデバイスと対向しない面に配置されてもよい。 In the aspect of the present invention described above, the first antenna element may be disposed on a surface of the two main surfaces of the circuit board that does not face the display device.
　上述した本発明の一態様において、前記第１のアンテナ素子と前記第２のアンテナ素子の間隔は、使用周波数における電気長１／４波長以下とするとよい。 In one embodiment of the present invention described above, an interval between the first antenna element and the second antenna element is preferably an electrical length of ¼ wavelength or less at a use frequency.
　上述した本発明の一態様において、前記第２のアンテナ素子の長手方向の長さは、前記使用周波数における電気長１／２波長以下とするとよい。 In the above-described aspect of the present invention, the length of the second antenna element in the longitudinal direction may be an electrical length of ½ wavelength or less at the use frequency.
　上述した本発明の一態様によれば、ディスプレイデバイスの背面に対向して位置する回路基板上にアンテナ（放射素子）を配置する場合に指向性パターンの改善を図ることができる。 According to the above-described aspect of the present invention, the directivity pattern can be improved when an antenna (radiating element) is disposed on a circuit board positioned opposite to the back surface of the display device.
図１は、実施の形態１に係る電子機器の機能的な構成例を示すブロック図である。FIG. 1 is a block diagram illustrating a functional configuration example of the electronic apparatus according to the first embodiment. 図２は、実施の形態１に係る電子機器の外観構成例を示す投影図である。FIG. 2 is a projection view illustrating an external configuration example of the electronic apparatus according to the first embodiment. 図３Ａは、実施の形態１に係る電子機器の正面透視図である。3A is a front perspective view of the electronic apparatus according to Embodiment 1. FIG. 図３Ｂは、実施の形態１に係る電子機器の断面透視図である。FIG. 3B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 1. 図４は、実施の形態１に係る電子機器の外観構成例を示す斜視図である。FIG. 4 is a perspective view illustrating an external configuration example of the electronic apparatus according to the first embodiment. 図５Ａは、実施の形態１に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 5A is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 1. 図５Ｂは、実施の形態１に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 5B is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1. 図５Ｃは、実施の形態１に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 5C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1. 図６Ａは、実施の形態１に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。6A is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic apparatus according to Embodiment 1. FIG. 図６Ｂは、実施の形態１に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。6B is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1. FIG. 図６Ｃは、実施の形態１に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。6C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1. FIG. 図７Ａは、実施の形態１に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 7A is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1. 図７Ｂは、実施の形態１に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 7B is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1. 図７Ｃは、実施の形態１に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 7C is a diagram illustrating a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1. 図８Ａは、比較例に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 8A is a diagram illustrating a measurement result of antenna directivity (yz plane) of an electronic device according to a comparative example. 図８Ｂは、比較例に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 8B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example. 図８Ｃは、比較例に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 8C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example. 図９Ａは、比較例に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。FIG. 9A is a diagram illustrating a measurement result of antenna directivity (zx plane) of an electronic device according to a comparative example. 図９Ｂは、比較例に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。FIG. 9B is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example. 図９Ｃは、比較例に係る電子機器のアンテナ指向性（ｚｘ面）の測定結果を示す図である。FIG. 9C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example. 図１０Ａは、比較例に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 10A is a diagram illustrating a measurement result of antenna directivity (xy plane) of an electronic device according to a comparative example. 図１０Ｂは、比較例に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 10B is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example. 図１０Ｃは、比較例に係る電子機器のアンテナ指向性（ｘｙ面）の測定結果を示す図である。FIG. 10C is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example. 図１１Ａは、実施の形態２に係る電子機器の正面透視図である。FIG. 11A is a front perspective view of the electronic apparatus according to Embodiment 2. 図１１Ｂは、実施の形態２に係る電子機器の断面透視図である。FIG. 11B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 2. 図１２Ａは、実施の形態２に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。12A is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 2. FIG. 図１２Ｂは、実施の形態２に係る電子機器のアンテナ指向性（ｙｚ面）の測定結果を示す図である。FIG. 12B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 2. 図１３Ａは、その他の実施の形態に係る電子機器の正面透視図である。FIG. 13A is a front perspective view of an electronic apparatus according to another embodiment. 図１３Ｂは、その他の実施の形態に係る電子機器の側面透視図である。FIG. 13B is a side perspective view of an electronic apparatus according to another embodiment. 図１４Ａは、その他の実施の形態に係る電子機器の正面透視図である。FIG. 14A is a front perspective view of an electronic apparatus according to another embodiment. 図１４Ｂは、その他の実施の形態に係る電子機器の側面透視図である。FIG. 14B is a side perspective view of an electronic apparatus according to another embodiment. 図１５Ａは、その他の実施の形態に係る電子機器の正面透視図である。FIG. 15A is a front perspective view of an electronic apparatus according to another embodiment. 図１５Ｂは、その他の実施の形態に係る電子機器の断面透視図である。FIG. 15B is a cross-sectional perspective view of an electronic apparatus according to another embodiment. 図１６Ａは、その他の実施の形態に係る電子機器の正面透視図である。FIG. 16A is a front perspective view of an electronic device according to another embodiment. 図１６Ｂは、その他の実施の形態に係る電子機器の側面透視図である。FIG. 16B is a side perspective view of an electronic apparatus according to another embodiment.
　以下では、本発明を適用した具体的な実施の形態について、図面を参照しながら詳細に説明する。各図面において、同一又は対応する要素には同一の符号が付されており、説明の明確化のため、必要に応じて重複説明は省略される。 Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted as necessary for clarification of the description.
＜発明の実施の形態１＞
　本実施の形態にかかる電子機器１は、無線通信回路を有する可搬型の電子機器である。電子機器１は、例えば、スマートフォン又はタブレットＰＣである。始めに図１及び図２（Ａ）～（Ｃ）を参照して、電子機器１の機能及び外観の概略的な説明を行う。 <Embodiment 1 of the Invention>
The electronic device 1 according to the present embodiment is a portable electronic device having a wireless communication circuit. The electronic device 1 is, for example, a smartphone or a tablet PC. First, with reference to FIG. 1 and FIGS. 2A to 2C, the function and appearance of the electronic apparatus 1 will be schematically described.
　図１は、電子機器１の機能的な構成例を示すブロック図である。図１において、無線通信回路１１は、無線トランスミッタ、無線レシーバ、又は無線トランシーバである。つまり、無線通信回路１１は、無線通信に関するプロトコル処理および信号処理を行い、アンテナ１０を用いて無線信号の送信及び受信の少なくとも一方を行う。無線通信回路１１は、例えば、ＧＰＳ受信機チップ、又は無線ＬＡＮ（Local　Area　Network）チップである。 FIG. 1 is a block diagram illustrating a functional configuration example of the electronic device 1. In FIG. 1, the wireless communication circuit 11 is a wireless transmitter, a wireless receiver, or a wireless transceiver. That is, the wireless communication circuit 11 performs protocol processing and signal processing related to wireless communication, and performs at least one of transmission and reception of a wireless signal using the antenna 10. The wireless communication circuit 11 is, for example, a GPS receiver chip or a wireless LAN (Local Area Network) chip.
　ディスプレイデバイス１２は、画像表示可能な表示面を有する。ディスプレイデバイス１２の具体例は、ＬＣＤ(Liquid　Crystal　Display)、及び有機ＥＬ（Electroluminescence）ディスプレイを含む。ディスプレイデバイス１２は、表示パネル（e.g.　液晶パネル又は有機ＥＬパネル）と、表示パネルを駆動するドライバを含む半導体電子部品が搭載された回路基板とが導電性のシールドケース内に収容された構造を有する。つまり、ディスプレイデバイス１２の表示面に対向する背面と、ディスプレイデバイス１２の側面は、導電性のシールド材によって覆われている。 The display device 12 has a display surface capable of displaying an image. Specific examples of the display device 12 include an LCD (Liquid Crystal Display) and an organic EL (Electroluminescence) display. The display device 12 has a structure in which a display panel (eg, a liquid crystal panel or an organic EL panel) and a circuit board on which semiconductor electronic components including a driver for driving the display panel are mounted are accommodated in a conductive shield case. . That is, the back surface facing the display surface of the display device 12 and the side surface of the display device 12 are covered with the conductive shield material.
　入力デバイス１３は、電子機器１に対するユーザの操作を受け付けるためのデバイスである。入力デバイス１３の具体例は、物理的な実体のある操作ボタン及びスイッチ、タッチパネル、マイクロフォン、並びにカメラを含む。入力デバイス１３がタッチパネルである場合、当該タッチパネルは、ディスプレイデバイス１２の表示面上に一体的に配置される。 The input device 13 is a device for accepting a user operation on the electronic device 1. Specific examples of the input device 13 include operation buttons and switches having physical entities, a touch panel, a microphone, and a camera. When the input device 13 is a touch panel, the touch panel is integrally disposed on the display surface of the display device 12.
　マイクロプロセッサ１４は、ＯＳ（Operating　System）及びアプリケーションプログラムを実行し、電子機器１の全体制御、ユーザが希望する機能の提供を行う。ＯＳ及びアプリケーションプログラムは、ＲＯＭ（Read　Only　Memory）１６又はフラッシュメモリ１７からＲＡＭ（Random　Access　Memory）１５にロードされる。マイクロプロセッサ１４は、ＲＡＭ１５にロードされたプログラムを実行する。 The microprocessor 14 executes an OS (Operating System) and application programs, and performs overall control of the electronic device 1 and provision of functions desired by the user. The OS and application program are loaded from a ROM (Read Only Memory) 16 or a flash memory 17 into a RAM (Random Access Memory) 15. The microprocessor 14 executes a program loaded on the RAM 15.
　上述した無線通信回路１１、マイクロプロセッサ１４、ＲＡＭ１５、ＲＯＭ１６、及びフラッシュメモリ１７を含む半導体電子部品は、１つのプリント配線基板上に一体的に配置されてもよいし、複数のプリント配線基板上に分散して配置されてもよい。 The above-described semiconductor electronic components including the wireless communication circuit 11, the microprocessor 14, the RAM 15, the ROM 16, and the flash memory 17 may be integrally disposed on one printed wiring board or on a plurality of printed wiring boards. It may be distributed.
　図２（Ａ）～（Ｃ）は、電子機器１の外観構成例を示す投影図である。図２（Ａ）は、ディスプレイデバイス１２の表示面１２０側から見た正面図である。また、図２（Ｂ）は左側面図、図２（Ｃ）は上面図である。図２に示されている３つのボタン１３０は、入力デバイス１３の具体例である。ケース２は、開口２０と、開口２０を囲むフレーム部材２１～２４を有している。ケース２は、例えば、合成樹脂、又は炭素繊維強化樹脂によって形成されている。ケース２は、フレーム部材２１～２４によって開口２０を有するキャビティが形成されている。ケース２のキャビティ内には、ディスプレイデバイス１２と、無線通信回路１１を含む半導体電子部品が搭載された回路基板が配置される。 FIGS. 2A to 2C are projection views showing an example of the external configuration of the electronic apparatus 1. FIG. FIG. 2A is a front view of the display device 12 as viewed from the display surface 120 side. 2B is a left side view, and FIG. 2C is a top view. The three buttons 130 shown in FIG. 2 are specific examples of the input device 13. The case 2 has an opening 20 and frame members 21 to 24 surrounding the opening 20. The case 2 is made of, for example, a synthetic resin or a carbon fiber reinforced resin. In the case 2, a cavity having an opening 20 is formed by the frame members 21 to 24. In the cavity of the case 2, a circuit board on which semiconductor devices including the display device 12 and the wireless communication circuit 11 are mounted is disposed.
　より具体的に述べると、ディスプレイデバイス１２は、開口２０を通じて外部から表示面１２０が視認できるようにケース２のキャビティ内に配置されている。なお、図２では記載が省略されているが、表示面１２０は、可視光を透過するガラス又は合成樹脂によって形成されたフロントパネル（不図示）によって保護されてもよい。無線通信回路１１を含む半導体電子部品が搭載された回路基板は、ディスプレイデバイス１２の背面に対向するようにケース２のキャビティ内に配置される。 More specifically, the display device 12 is disposed in the cavity of the case 2 so that the display surface 120 can be visually recognized from the outside through the opening 20. Although not shown in FIG. 2, the display surface 120 may be protected by a front panel (not shown) formed of glass or synthetic resin that transmits visible light. A circuit board on which semiconductor electronic components including the wireless communication circuit 11 are mounted is disposed in the cavity of the case 2 so as to face the back surface of the display device 12.
　続いて以下では、本実施の形態のアンテナ１０の構成及び配置の詳細について説明する。アンテナ１０は、放射素子（給電素子）１０１と無給電の寄生素子１０２を含む。 Subsequently, details of the configuration and arrangement of the antenna 10 of the present embodiment will be described below. The antenna 10 includes a radiating element (feeding element) 101 and a parasitic element 102 without feeding.
　放射素子１０１は、無線通信回路１１が搭載されたプリント回路基板に配置される。放射素子１０１は、回路基板の表面に実装されるチップアンテナでもよいし、プリント配線によって回路基板に形成されたアンテナパターンであってもよい。放射素子１０１は、回路基板上に配置された無線通信回路１１と基板上のパターンで形成された給電線によって接続されている。放射素子１０１の偏波特性は、直線偏波でもよいし、円偏波でもよい。　　　 The radiating element 101 is disposed on a printed circuit board on which the wireless communication circuit 11 is mounted. The radiating element 101 may be a chip antenna mounted on the surface of the circuit board, or an antenna pattern formed on the circuit board by printed wiring. The radiating element 101 is connected to the wireless communication circuit 11 arranged on the circuit board by a feeder line formed by a pattern on the board. The polarization characteristics of the radiating element 101 may be linearly polarized waves or circularly polarized waves. *
　寄生素子１０２は、放射素子１０１から離間して配置される。寄生素子１０２は、金属などの導電性材料で形成された薄板（例えば、板金）又はフィルム（例えば、金属を薄くして、のりをつけた金属テープ）とすればよい。放射素子１０１と寄生素子１０２の間隔は、所望の指向性パターンが得られるように適宜調整すればよい。具体的には、寄生素子１０２が導波器として効果的に機能するように、放射素子１０１と寄生素子１０２の間隔は、使用周波数の電気長１／４波長、又はそれ以下とすればよい。 The parasitic element 102 is disposed away from the radiating element 101. The parasitic element 102 may be a thin plate (for example, a sheet metal) or a film (for example, a metal tape having a thin metal and a paste) formed of a conductive material such as metal. What is necessary is just to adjust suitably the space | interval of the radiation element 101 and the parasitic element 102 so that a desired directivity pattern may be obtained. Specifically, the distance between the radiating element 101 and the parasitic element 102 may be set to an electrical length of ¼ wavelength of the use frequency or less so that the parasitic element 102 effectively functions as a director.
　次に、放射素子１０１及び寄生素子１０２とディスプレイデバイス１２の位置関係について説明する。図３（Ａ）及び（Ｂ）は、放射素子１０１及び寄生素子１０２の配置の具体例を示す図である。図３（Ａ）は、電子機器１の正面方向から見た透視図である。図３（Ａ）では、ケース２、ディスプレイデバイス１２、及びボタン１３０が破線で示されており、ケース２及びディスプレイデバイス１２の下方に位置する回路基板３、放射素子１０１、及び寄生素子１０２が図示されている。図３（Ｂ）は、図３（Ａ）の切断線Ｉでケース２を切断した場合のキャビティ内を示す断面透視図である。なお、図３（Ｂ）ではケース２の図示を省略している。図３（Ｂ）に示されたシールドケース１２１は、ノイズ防止のために、ディスプレイデバイス１２の側面及び背面を覆う導電性のシールド材である。 Next, the positional relationship between the radiating element 101 and the parasitic element 102 and the display device 12 will be described. 3A and 3B are diagrams illustrating a specific example of the arrangement of the radiating element 101 and the parasitic element 102. FIG. FIG. 3A is a perspective view seen from the front direction of the electronic apparatus 1. In FIG. 3A, the case 2, the display device 12, and the button 130 are indicated by broken lines, and the circuit board 3, the radiating element 101, and the parasitic element 102 located below the case 2 and the display device 12 are illustrated. Has been. FIG. 3B is a cross-sectional perspective view showing the inside of the cavity when the case 2 is cut along the cutting line I in FIG. In addition, illustration of case 2 is abbreviate | omitted in FIG.3 (B). The shield case 121 shown in FIG. 3B is a conductive shield material that covers the side surface and the back surface of the display device 12 to prevent noise.
　回路基板３は、無線通信回路１１、マイクロコントローラを含む半導体電子部品が実装されたプリント回路基板である。放射素子１０１は、回路基板３に配置され、無線通信回路１１と給電線３０によって接続されている。図３（Ａ）及び（Ｂ）の例では、放射素子１０１は、回路基板３に表面実装されるチップアンテナである。図３（Ａ）から明らかであるように、放射素子１０１は、表示面１２０に垂直な電子機器１の正面側から見た場合にディスプレイデバイス１２と重ならないフレーム領域に配置されている。具体的には、放射素子１０１は、図３（Ａ）の紙面左側に位置するフレーム部材２１の下方に位置している。 The circuit board 3 is a printed circuit board on which semiconductor electronic components including a wireless communication circuit 11 and a microcontroller are mounted. The radiating element 101 is disposed on the circuit board 3 and is connected to the wireless communication circuit 11 by the feeder line 30. In the example of FIGS. 3A and 3B, the radiating element 101 is a chip antenna that is surface-mounted on the circuit board 3. As is clear from FIG. 3A, the radiating element 101 is arranged in a frame region that does not overlap the display device 12 when viewed from the front side of the electronic device 1 perpendicular to the display surface 120. Specifically, the radiating element 101 is located below the frame member 21 located on the left side of the sheet of FIG.
　寄生素子１０２は、その少なくとも一部がフレーム領域（つまり、正面側から見た場合にディスプレイデバイス１２と重ならない領域）に配置されている。さらに、図３（Ｂ）から明らかであるように、寄生素子１０２は、電子機器１の側面側から見た場合に、少なくとも一部がディスプレイデバイス１２のシールドケース１２１で覆われた背面より上方の表示面１２０側に位置するように配置されている。 The parasitic element 102 is at least partially disposed in a frame region (that is, a region that does not overlap the display device 12 when viewed from the front side). Further, as is apparent from FIG. 3B, the parasitic element 102 is at least partially above the rear surface covered with the shield case 121 of the display device 12 when viewed from the side surface side of the electronic device 1. It arrange | positions so that it may be located in the display surface 120 side.
　上述したように、本実施の形態では、放射素子１０１及び寄生素子１０２をフレーム領域に配置しているため、放射素子１０１及び寄生素子１０２とシールドケース１２１との距離を遠ざけることができる。このため、放射素子１０１とシールドケース１２１の結合によってシールドケース１２１が導波器又は反射器として動作することを抑制できる。加えて、本実施の形態では、寄生素子１０２をディスプレイデバイス１２の背面より上方の表示面１２０側に位置するように配置している。このため、導波器として機能する寄生素子１０２は、図３（Ａ）の紙面左側方向に向けて効率よく電界を放射できる。したがって、電子機器１は、図３（Ａ）の紙面左側方向において、電子機器１の正面、側面、及び背面を含む一様な指向性パターンを得ることができる。 As described above, in the present embodiment, since the radiating element 101 and the parasitic element 102 are arranged in the frame region, the distance between the radiating element 101 and the parasitic element 102 and the shield case 121 can be increased. For this reason, it can suppress that the shield case 121 operate | moves as a director or a reflector by the coupling | bonding of the radiation element 101 and the shield case 121. FIG. In addition, in the present embodiment, the parasitic element 102 is disposed on the display surface 120 side above the back surface of the display device 12. For this reason, the parasitic element 102 functioning as a director can efficiently radiate an electric field toward the left side in FIG. 3A. Therefore, the electronic device 1 can obtain a uniform directivity pattern including the front surface, the side surface, and the back surface of the electronic device 1 in the left direction in FIG. 3A.
　上述した放射素子１０１及び寄生素子１０２とディスプレイデバイス１２との位置関係に加えて、指向性パターンの改善のためにさらに以下のように工夫してもよい。まず、上述した寄生素子１０２の少なくとも一部は、細長形状を持つ放射素子１０１の長手方向と実質的に平行に配置するとよい。これにより、放射素子１０１と寄生素子１０２との結合を強めることができる。なお、「実質的に平行」とは、放射素子１０１と寄生素子１０２との結合を強めることができるのであれば、ある程度の誤差範囲を含んで厳密に平行でなくてもよいことを意味する。 In addition to the positional relationship between the radiating element 101 and the parasitic element 102 and the display device 12 described above, the following may be devised to improve the directivity pattern. First, at least a part of the parasitic element 102 described above may be disposed substantially parallel to the longitudinal direction of the radiating element 101 having an elongated shape. Thereby, the coupling | bonding of the radiation element 101 and the parasitic element 102 can be strengthened. Note that “substantially parallel” means that the coupling between the radiating element 101 and the parasitic element 102 may not be strictly parallel including a certain error range as long as the coupling between the radiating element 101 and the parasitic element 102 can be enhanced.
　また、寄生素子１０２の長さは、使用周波数の電気長１／２波長程度とすればよい。なお、一般的に、寄生素子の電気長が１／２波長よりわずかに（概ね５％程度）短い場合に寄生素子が導波器として効果的に機能することが知られている。したがって、本実施の形態に係る寄生素子１０２の長さは、使用周波数の電気長１／２波長よりわずかに（概ね５％程度）短くするとよい。 Further, the length of the parasitic element 102 may be about an electrical length ½ wavelength of the used frequency. In general, it is known that the parasitic element effectively functions as a waveguide when the electrical length of the parasitic element is slightly shorter (approximately 5%) than the ½ wavelength. Therefore, the length of the parasitic element 102 according to the present embodiment may be slightly shorter (approximately about 5%) than the electrical length ½ wavelength of the operating frequency.
　また、放射素子１０１は、図３（Ｂ）に示すように、回路基板３の２つの主面のうちディスプレイデバイス１２の背面と対向しない面に配置するとよい。これにより、放射素子１０１とディスプレイデバイス１２の背面を覆うシールドケース１２１との距離をさらに離すことができるため、放射素子１０１とシールドケース１２１の結合を弱めることができる。 Further, as shown in FIG. 3B, the radiating element 101 may be disposed on a surface that does not oppose the back surface of the display device 12 among the two main surfaces of the circuit board 3. Thereby, since the distance between the radiating element 101 and the shield case 121 covering the back surface of the display device 12 can be further increased, the coupling between the radiating element 101 and the shield case 121 can be weakened.
　また、寄生素子１０２は、ケース２（つまりフレーム部材２１）の内側又は外側に接するように配置されてもよい。より具体的に述べると、寄生素子１０２は、導電性フィルム又は導電性の薄板をケース２（つまりフレーム部材２１）の内側又は外側に貼り付けることによって配置してもよい。図４は、寄生素子１０２として導電性フィルムを使用し、寄生素子１０２をケース２の外側に貼り付けた状態を示している。図４に示すように、寄生素子１０２のうち金属テープをケース２の外側に貼り付ける形態を採用することによって、作業性が向上し、かつ指向性パターンの微調整が容易となる。また、図４に示すように、金属テープを用いることで、寄生素子１０２の厚みを抑えることができるため、電子機器１の限られたスペースに寄生素子１０２を配置できる。さらにまた、金属テープを用いることで、様々な形状に加工することができ、凹凸面への貼り付けもできるため、作業性がより一層向上し、かつ指向性パターンの微調整がより一層容易となる。 Further, the parasitic element 102 may be disposed so as to contact the inside or the outside of the case 2 (that is, the frame member 21). More specifically, the parasitic element 102 may be disposed by attaching a conductive film or a conductive thin plate to the inside or the outside of the case 2 (that is, the frame member 21). FIG. 4 shows a state in which a conductive film is used as the parasitic element 102 and the parasitic element 102 is attached to the outside of the case 2. As shown in FIG. 4, by adopting a form in which a metal tape is affixed to the outside of the case 2 among the parasitic elements 102, workability is improved and fine adjustment of the directivity pattern is facilitated. In addition, as shown in FIG. 4, by using a metal tape, the thickness of the parasitic element 102 can be suppressed, so that the parasitic element 102 can be arranged in a limited space of the electronic device 1. Furthermore, by using a metal tape, it can be processed into various shapes and can be attached to an uneven surface, so that workability is further improved and fine adjustment of the directivity pattern is easier. Become.
　なお、寄生素子１０２をケース２の外側に貼り付ける場合、図４に示すように、カバー２５によって寄生素子１０２を覆うとよい。カバー２５は、ケース２のうち少なくとも寄生素子１０２が設けられた部分を覆うことができるように構成されている。これにより、寄生素子１０２の損傷を防止できる。 When the parasitic element 102 is attached to the outside of the case 2, the parasitic element 102 may be covered with a cover 25 as shown in FIG. The cover 25 is configured to cover at least a portion of the case 2 where the parasitic element 102 is provided. Thereby, damage to the parasitic element 102 can be prevented.
　さらに、カバー２５は合成樹脂等の誘電性材料によって形成するとよい。これにより、アンテナ１０（放射素子１０１及び寄生素子１０２）を受信アンテナとして使用する場合に、カバー２５による波長短縮効果が得られる。このため、寄生素子１０２が露出した状態とする場合に比べて寄生素子１０２の長さを短くすることができ、寄生素子１０２の配置に要するスペースを削減できる。 Furthermore, the cover 25 may be formed of a dielectric material such as synthetic resin. Thereby, when the antenna 10 (the radiating element 101 and the parasitic element 102) is used as a receiving antenna, the wavelength shortening effect by the cover 25 is obtained. For this reason, the length of the parasitic element 102 can be shortened compared with the case where the parasitic element 102 is exposed, and the space required for the arrangement of the parasitic element 102 can be reduced.
　続いて以下では、寄生素子１０２を設けることによる指向性パターンの改善効果を測定結果に基づいて説明する。ここでは、アンテナ１０をＧＰＳ受信アンテナとした場合の測定結果を示す。使用周波数は、ＧＰＳ信号に対応する１５７５．４２ＭＨｚである。放射素子１０１は、電気長１／４波長のヘリカル構造を持つチップアンテナである。寄生素子１０２は、図４に示すように、導電性フィルムをフレーム部材２１の外側に貼り付けられた導電性フィルムである。また、カバー２５によって寄生素子１０２を覆う構成を採用した。いま、使用周波数における１／２波長は約９５ｍｍであるが、カバー２５及び導電性フィルム材による波長短縮効果が得られるため、寄生素子１０２の長さは４９ｍｍとした。 Subsequently, the effect of improving the directivity pattern by providing the parasitic element 102 will be described based on the measurement result. Here, the measurement result when the antenna 10 is a GPS receiving antenna is shown. The frequency used is 1575.42 MHz corresponding to the GPS signal. The radiating element 101 is a chip antenna having a helical structure with an electrical length of ¼ wavelength. As shown in FIG. 4, the parasitic element 102 is a conductive film in which a conductive film is attached to the outside of the frame member 21. Further, a configuration in which the parasitic element 102 is covered with the cover 25 is employed. At present, the half wavelength at the operating frequency is about 95 mm, but the length of the parasitic element 102 is set to 49 mm in order to obtain the wavelength shortening effect by the cover 25 and the conductive film material.
　図５Ｂ及び図５Ｃは、本実施の形態にかかる電子機器１の指向性パターンを示す図である。図５Ｂ及び図５Ｃは、表示面１２０に対して水平なｙｚ面（図５Ａ参照）の測定結果を示している。図５Ｂは垂直偏波の測定結果、図５Ｃは水平偏波の測定結果である。 5B and 5C are diagrams showing directivity patterns of the electronic device 1 according to the present embodiment. 5B and 5C show measurement results on the yz plane (see FIG. 5A) that is horizontal to the display surface 120. FIG. FIG. 5B shows the measurement result of vertical polarization, and FIG. 5C shows the measurement result of horizontal polarization.
　同様に、図６Ｂ及び図６Ｃは、本実施の形態にかかる電子機器１の指向性パターンを示す図である。図６Ｂ及び図６Ｃは、表示面１２０に対して垂直なｚｘ面（図６Ａ参照）の測定結果を示している。図６Ｂは垂直偏波の測定結果、図６Ｃは水平偏波の測定結果である。 Similarly, FIGS. 6B and 6C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment. 6B and 6C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 6A). FIG. 6B shows the measurement result of vertical polarization, and FIG. 6C shows the measurement result of horizontal polarization.
　図７Ｂ及び図７Ｃは、本実施の形態にかかる電子機器１の指向性パターンを示す図である。図７Ｂ及び図７Ｃは、表示面１２０に対して垂直なｘｙ面（図７Ａ参照）の測定結果を示している。図７Ｂは垂直偏波の測定結果、図７Ｃは水平偏波の測定結果である。 7B and 7C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment. 7B and 7C show the measurement results of the xy plane (see FIG. 7A) perpendicular to the display surface 120. FIG. FIG. 7B shows the measurement result of vertical polarization, and FIG. 7C shows the measurement result of horizontal polarization.
　一方、図８Ｂ及び図８Ｃは、寄生素子１０２を有していない比較例の指向性パターンを示す図である。比較例は、寄生素子１０２を有していないことを除いて、電子機器１と同じ構成を持つ。図８Ｂ及び図８Ｃは、表示面１２０に対して水平なｙｚ面（図８Ａ参照）の測定結果を示している。図８Ｂは垂直偏波の測定結果、図８Ｃは水平偏波の測定結果である。 On the other hand, FIG. 8B and FIG. 8C are diagrams showing directivity patterns of comparative examples that do not have the parasitic element 102. The comparative example has the same configuration as the electronic device 1 except that the parasitic element 102 is not included. 8B and 8C show the measurement results of the yz plane (see FIG. 8A) that is horizontal with respect to the display surface 120. FIG. FIG. 8B shows the measurement result of vertical polarization, and FIG. 8C shows the measurement result of horizontal polarization.
　同様に、図９Ｂ及び図９Ｃは、比較例の指向性パターンを示す図である。図９Ｂ及び図９Ｃは、表示面１２０に対して垂直なｚｘ面（図９Ａ参照）の測定結果を示している。図９Ｂは垂直偏波の測定結果、図９Ｃは水平偏波の測定結果である。 Similarly, FIG. 9B and FIG. 9C are diagrams showing directivity patterns of comparative examples. 9B and 9C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 9A). FIG. 9B shows the measurement result of vertical polarization, and FIG. 9C shows the measurement result of horizontal polarization.
　図１０Ｂ及び図１０Ｃは、比較例の指向性パターンを示す図である。図１０Ｂ及び図１０Ｃは、表示面１２０に対して垂直なｘｙ面（図１０Ａ参照）の測定結果を示している。図１０Ｂは垂直偏波の測定結果、図１０Ｃは水平偏波の測定結果である。 10B and 10C are diagrams showing directivity patterns of comparative examples. 10B and 10C show the measurement results of the xy plane (see FIG. 10A) perpendicular to the display surface 120. FIG. FIG. 10B shows the measurement result of vertical polarization, and FIG. 10C shows the measurement result of horizontal polarization.
　寄生素子１０２による効果は、図５Ｃに示したｙｚ面の水平偏波の測定結果において顕著である。図５Ｃと図８Ｃを比べると、図５Ｃでは、３００度から０度方向の利得が５ｄＢ程度向上している。また、寄生素子１０２による効果は、図６Ｂに示したｚｘ面の垂直偏波の測定結果においても顕著である。図６Ｂと図９Ｂを比べると、図６Ｂでは、０度から６０度方向、及び３００度から０度方向の利得が４～５ｄＢ程度向上しており、指向性パターンが改善されている。 The effect of the parasitic element 102 is remarkable in the measurement result of the horizontal polarization of the yz plane shown in FIG. 5C. Comparing FIG. 5C and FIG. 8C, in FIG. 5C, the gain in the direction from 300 degrees to 0 degrees is improved by about 5 dB. The effect of the parasitic element 102 is also remarkable in the measurement result of the zx-plane vertical polarization shown in FIG. 6B. Comparing FIG. 6B and FIG. 9B, in FIG. 6B, the gains in the 0 to 60 degree direction and the 300 to 0 degree direction are improved by about 4 to 5 dB, and the directivity pattern is improved.
＜発明の実施の形態２＞
　上述した発明の実施の形態１では、図３Ａ及び図３Ｂに示したように、寄生素子１０２を直線形状とする具体例を示した。本実施の形態では、寄生素子１０２の形状をＬ字型とした変形例について説明する。なお、本実施の形態にかかる電子機器４の構成は、寄生素子１０２の形状を除いて、実施の形態１で説明した電子機器１と同様である。 <Embodiment 2 of the Invention>
In the first embodiment of the present invention described above, the specific example in which the parasitic element 102 is linear as shown in FIGS. 3A and 3B has been described. In the present embodiment, a modified example in which the shape of the parasitic element 102 is an L-shape will be described. The configuration of the electronic device 4 according to the present embodiment is the same as that of the electronic device 1 described in the first embodiment except for the shape of the parasitic element 102.
　図１１Ａ及び図１１Ｂは、本実施の形態にかかる電子機器４における放射素子１０１及び寄生素子１０２の配置の具体例を示す図である。図１１Ａに示すように、本実施の形態の寄生素子１０２は、Ｌ字形状を有し、正面側から見た場合に表示面１２０を囲むフレーム領域の隣接する２辺に跨って配置されている。図１１Ａの例では、寄生素子１０２は、隣接する２辺のフレーム部材２１及び２２によって形成されるフレーム領域に跨って配置されている。なお、実施の形態１でも述べたように、寄生素子１０２の全体がフレーム領域に位置している必要は無く、その少なくとも一部がフレーム領域に位置していればよい。 FIGS. 11A and 11B are diagrams illustrating specific examples of the arrangement of the radiation element 101 and the parasitic element 102 in the electronic apparatus 4 according to the present embodiment. As shown in FIG. 11A, the parasitic element 102 of the present embodiment has an L shape and is disposed across two adjacent sides of a frame region surrounding the display surface 120 when viewed from the front side. . In the example of FIG. 11A, the parasitic element 102 is disposed across the frame region formed by the frame members 21 and 22 on two adjacent sides. As described in the first embodiment, the entire parasitic element 102 does not need to be located in the frame region, and at least a part of the parasitic element 102 may be located in the frame region.
　図１２Ｂは、電子機器４の指向性パターンを示す図である。図１２Ｂは、表示面１２０に対して水平なｙｚ面（図１２Ａ参照）の測定結果を示している。つまり、図１２Ｂは、実施の形態１の図５Ｃに対応する。図１２Ｂと図５Ｃを比べると、図１２Ｂでは、３００度から０度方向の利得がさらに５ｄＢ程度向上している。 FIG. 12B is a diagram showing a directivity pattern of the electronic device 4. FIG. 12B shows the measurement result of the yz plane (see FIG. 12A) that is horizontal to the display surface 120. That is, FIG. 12B corresponds to FIG. 5C of the first embodiment. Comparing FIG. 12B and FIG. 5C, in FIG. 12B, the gain from 300 degrees to 0 degrees is further improved by about 5 dB.
　上述したように、Ｌ字形状の寄生素子１０２をフレーム領域の２辺に跨って配置することで、指向性パターンをより一層改善することができる。なお、本実施の形態で説明したＬ字形状の寄生素子１０２は、図１１Ａのように直角に折り曲げた形状だけでなく、折り曲げ角度が９０度より大きい素子及び小さい素子を含む。さらに、本実施の形態で説明したＬ字形状の寄生素子１０２は、折り曲げ部分が曲線とされた素子も含む。 As described above, the directivity pattern can be further improved by disposing the L-shaped parasitic element 102 across the two sides of the frame region. Note that the L-shaped parasitic element 102 described in this embodiment includes not only a shape bent at a right angle as shown in FIG. 11A but also an element having a bending angle larger than 90 degrees and a small element. Furthermore, the L-shaped parasitic element 102 described in this embodiment includes an element in which a bent portion is curved.
＜その他の実施の形態＞
　図１３～図１６は、寄生素子１０２の形状に関するその他のバリエーションを示している。図１３Ａ及び図１３Ｂに示す電子機器５は、ケース２の側面上に貼り付けられた寄生素子１０２を有する。図１４Ａ及び図１４Ｂに示す電子機器６は、ケース２の隣接する２つの側面に跨って貼り付けられたＬ字形状の寄生素子１０２を有する。図１５Ａ及び図１５Ｂに示す電子機器７は、フレーム部材２１の上面から隣接するフレーム部材２２の側面に跨って貼り付けられたＬ字形状の寄生素子１０２を有する。図１６Ａ及び図１６Ｂに示す電子機器８は、フレーム部材２１の側面から隣接するフレーム部材２２の上面に跨って貼り付けられたＬ字形状の寄生素子１０２を有する。指向性パターンの図示は省略するが、直線形状の寄生素子１０２を持つ電子機器５は、実施の形態１で説明した電子機器１と同様の原理によって、指向性パターンの改善を図ることができる。また、Ｌ字形状の寄生素子１０２を持つ電子機器６～８は、実施の形態２で説明した電子機器４と同様の原理によって、指向性パターンの改善を図ることができる。 <Other embodiments>
13 to 16 show other variations relating to the shape of the parasitic element 102. FIG. The electronic device 5 shown in FIGS. 13A and 13B includes a parasitic element 102 attached on the side surface of the case 2. The electronic device 6 shown in FIGS. 14A and 14B includes an L-shaped parasitic element 102 that is pasted across two adjacent side surfaces of the case 2. The electronic device 7 shown in FIGS. 15A and 15B includes an L-shaped parasitic element 102 that is pasted from the upper surface of the frame member 21 to the side surface of the adjacent frame member 22. The electronic device 8 shown in FIGS. 16A and 16B includes an L-shaped parasitic element 102 that is pasted from the side surface of the frame member 21 to the upper surface of the adjacent frame member 22. Although illustration of the directivity pattern is omitted, the electronic device 5 having the linear parasitic element 102 can improve the directivity pattern based on the same principle as the electronic device 1 described in the first embodiment. In addition, the electronic devices 6 to 8 having the L-shaped parasitic element 102 can improve the directivity pattern based on the same principle as that of the electronic device 4 described in the second embodiment.
　上述した各実施の形態では、寄生素子１０２の形状の具体例として直線形状およびＬ字形状を示したが、寄生素子１０２の形状はその他の形状（例えばミアンダ形状）であってもよい。 In each of the embodiments described above, a linear shape and an L-shape are shown as specific examples of the shape of the parasitic element 102. However, the shape of the parasitic element 102 may be other shapes (for example, a meander shape).
　上述した各実施の形態では、１つの放射素子１０１に対して１つの寄生素子１０２を配置する例を示したが、１つの放射素子１０１に対して複数個の寄生素子１０２を配置してもよい。 In each of the above-described embodiments, an example in which one parasitic element 102 is arranged for one radiating element 101 is shown, but a plurality of parasitic elements 102 may be arranged for one radiating element 101. .
　さらに、本発明は上述した実施の形態のみに限定されるものではなく、既に述べた本発明の要旨を逸脱しない範囲において種々の変更が可能であることは勿論である。 Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention already described.
１、４～８　電子機器
２　ケース
３　回路基板
１０　アンテナ
１１　無線通信回路
１２　ディスプレイデバイス
１３　入力デバイス
１４　マイクロプロセッサ
１５　ＲＡＭ（Random　Access　Memory）
１６　ＲＯＭ（Read　Only　Memory）
１７　フラッシュメモリ
２０　開口
３０　給電線
２１～２４　フレーム部材
２５　カバー
１０１　放射素子（第１のアンテナ素子）
１０２　寄生素子（第２のアンテナ素子）
１２０　表示面
１２１　シールドケース
１３０　ボタン 1, 4 to 8 Electronic equipment 2 Case 3 Circuit board 10 Antenna 11 Wireless communication circuit 12 Display device 13 Input device 14 Microprocessor 15 RAM (Random Access Memory)
16 ROM (Read Only Memory)
17 Flash memory 20 Opening 30 Feeding lines 21 to 24 Frame member 25 Cover 101 Radiating element (first antenna element)
102 Parasitic element (second antenna element)
120 Display surface 121 Shield case 130 Button

Claims (10)

  1. 　電子機器であって、
    　開口を有するケースと、
    　前記ケース内に配置され、前記開口を通じて外部から視認可能な表示面、及び導電性のシールド材で覆われた背面を有するディスプレイデバイスと、
    　前記ディスプレイデバイスの前記背面に対向するように前記ケース内に配置され、無線通信回路を含む電子部品が実装された回路基板と、
    　前記表示面に垂直な前記電子機器の正面側から見た場合に前記ディスプレイデバイスと重ならないフレーム領域に位置するように前記回路基板上に配置され、前記無線通信回路と給電線により接続された第１のアンテナ素子と、
    　前記正面側から見た場合にその少なくとも一部が前記フレーム領域に位置するとともに、前記電子機器の側面側から見た場合に前記少なくとも一部が前記ディスプレイデバイスの前記背面より前記表示面側に位置するように配置された無給電の第２のアンテナ素子と、
    を備える電子機器。     Electronic equipment,
    A case having an opening;
    A display device disposed in the case and having a display surface visible from the outside through the opening, and a back surface covered with a conductive shield material;
    A circuit board that is disposed in the case so as to face the back surface of the display device and on which electronic components including a wireless communication circuit are mounted;
    The electronic device is disposed on the circuit board so as to be positioned in a frame region that does not overlap the display device when viewed from the front side of the electronic device perpendicular to the display surface, and is connected to the wireless communication circuit by a feeder line. 1 antenna element;
    When viewed from the front side, at least a part thereof is located in the frame region, and when viewed from the side of the electronic device, the at least part is located closer to the display surface than the back surface of the display device. A parasitic second antenna element arranged to
    Electronic equipment comprising.
  2. 　前記第１のアンテナ素子は細長の形状を有し、
    　前記第２のアンテナ素子の前記少なくとも一部は、前記第１のアンテナ素子の長手方向と実質的に平行に配置されている、
    請求項１に記載の電子機器。     The first antenna element has an elongated shape;
    The at least part of the second antenna element is disposed substantially parallel to a longitudinal direction of the first antenna element;
    The electronic device according to claim 1.
  3. 　前記フレーム領域は、前記開口を囲む４辺を有し、
    　前記第２のアンテナ素子は、Ｌ字型の形状を有するとともに、前記正面側から見た場合に前記フレーム領域の隣接する２辺に跨って配置されている、請求項１に記載の電子機器。     The frame region has four sides surrounding the opening;
    2. The electronic device according to claim 1, wherein the second antenna element has an L-shape and is disposed across two adjacent sides of the frame region when viewed from the front side.
  4. 　前記第２のアンテナ素子は、前記ケースの外側表面に接して設けられている、請求項１に記載の電子機器。 The electronic device according to claim 1, wherein the second antenna element is provided in contact with an outer surface of the case.
  5. 　前記ケースは、前記開口を囲むフレーム部材を備え、
    　前記第２のアンテナ素子の前記少なくとも一部は、前記フレーム部材のうち前記正面側から見た場合において前記第１のアンテナ素子より外側に位置する部分に接して設けられている、
    請求項１に記載の電子機器。     The case includes a frame member surrounding the opening,
    The at least part of the second antenna element is provided in contact with a portion of the frame member that is located outside the first antenna element when viewed from the front side.
    The electronic device according to claim 1.
  6. 　前記第２のアンテナ素子は、前記ケースに貼り付けられた導電性フィルムである、請求項４に記載の電子機器。 The electronic device according to claim 4, wherein the second antenna element is a conductive film attached to the case.
  7. 　前記ケースのうち少なくとも前記第２のアンテナ素子が設けられた部分を覆う誘電性のカバー部材をさらに備える、請求項４に記載の電子機器。 The electronic apparatus according to claim 4, further comprising a dielectric cover member that covers at least a portion of the case where the second antenna element is provided.
  8. 　前記第１のアンテナ素子は、前記回路基板の２つの主面のうち、前記ディスプレイデバイスと対向しない面に配置されている、請求項１に記載の電子機器。 The electronic device according to claim 1, wherein the first antenna element is disposed on a surface of the two main surfaces of the circuit board that does not face the display device.
  9. 　前記第１のアンテナ素子と前記第２のアンテナ素子の間隔は、使用周波数における電気長１／４波長以下である、請求項１に記載の電子機器。 2. The electronic apparatus according to claim 1, wherein an interval between the first antenna element and the second antenna element is equal to or less than a quarter wavelength of electrical length at a use frequency.
  10. 　前記第２のアンテナ素子の長手方向の長さは、前記使用周波数における電気長１／２波長以下である、請求項１に記載の電子機器。 2. The electronic device according to claim 1, wherein a length of the second antenna element in a longitudinal direction is equal to or shorter than an electrical length ½ wavelength at the use frequency.
PCT/JP2012/061139 2011-04-28 2012-04-25 Electronic instrument WO2012147817A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-101275 2011-04-28
JP2011101275A JP2012235224A (en) 2011-04-28 2011-04-28 Electronic apparatus

Publications (1)

Publication Number Publication Date
WO2012147817A1 true WO2012147817A1 (en) 2012-11-01

Family

ID=47072334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/061139 WO2012147817A1 (en) 2011-04-28 2012-04-25 Electronic instrument

Country Status (2)

Country Link
JP (1) JP2012235224A (en)
WO (1) WO2012147817A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106605335A (en) * 2014-12-08 2017-04-26 松下知识产权经营株式会社 Antenna and electric device
CN111542966A (en) * 2018-01-03 2020-08-14 三星电子株式会社 Display device and antenna assembly

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6179123B2 (en) 2013-02-21 2017-08-16 セイコーエプソン株式会社 Electronic clock with built-in antenna
KR102048507B1 (en) * 2013-06-21 2019-11-25 삼성전자주식회사 Antenna device and electronic device habing it
KR101681305B1 (en) 2014-08-01 2016-12-02 주식회사 하이딥 Touch input device
KR101452302B1 (en) 2013-07-29 2014-10-22 주식회사 하이딥 Touch sensor panel
KR101712346B1 (en) 2014-09-19 2017-03-22 주식회사 하이딥 Touch input device
JP6331430B2 (en) 2014-01-31 2018-05-30 セイコーエプソン株式会社 Electronic clock
JP6527343B2 (en) 2014-08-01 2019-06-05 株式会社 ハイディープＨｉＤｅｅｐ Ｉｎｃ． Touch input device
KR102226165B1 (en) 2014-08-19 2021-03-10 삼성전자주식회사 Antenna and electronic device having it
JP5845371B1 (en) 2014-09-19 2016-01-20 株式会社 ハイディープ smartphone
KR101604004B1 (en) 2014-11-18 2016-03-16 현대자동차주식회사 Audio-video apparatus for vehicle
JP6438841B2 (en) * 2015-05-19 2018-12-19 富士フイルム株式会社 Touch sensor panel and substrate
KR101583765B1 (en) 2015-07-27 2016-01-08 주식회사 하이딥 Smartphone
WO2019193793A1 (en) 2018-04-06 2019-10-10 パナソニックＩｐマネジメント株式会社 Antenna device and electronic device
US11342671B2 (en) 2019-06-07 2022-05-24 Sonos, Inc. Dual-band antenna topology

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003110329A (en) * 2001-07-25 2003-04-11 Matsushita Electric Ind Co Ltd Built-in antenna device
JP2003243916A (en) * 2002-02-15 2003-08-29 Matsushita Electric Ind Co Ltd Antenna system and mobile wireless apparatus
JP2009004875A (en) * 2007-06-19 2009-01-08 Toshiba Corp Electronic equipment
JP2009065388A (en) * 2007-09-05 2009-03-26 Toshiba Corp Wireless communication device and antenna device
JP2010028494A (en) * 2008-07-22 2010-02-04 Hitachi Cable Ltd Antenna and electric appliance equipped with the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003110329A (en) * 2001-07-25 2003-04-11 Matsushita Electric Ind Co Ltd Built-in antenna device
JP2003243916A (en) * 2002-02-15 2003-08-29 Matsushita Electric Ind Co Ltd Antenna system and mobile wireless apparatus
JP2009004875A (en) * 2007-06-19 2009-01-08 Toshiba Corp Electronic equipment
JP2009065388A (en) * 2007-09-05 2009-03-26 Toshiba Corp Wireless communication device and antenna device
JP2010028494A (en) * 2008-07-22 2010-02-04 Hitachi Cable Ltd Antenna and electric appliance equipped with the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106605335A (en) * 2014-12-08 2017-04-26 松下知识产权经营株式会社 Antenna and electric device
EP3232507A4 (en) * 2014-12-08 2017-11-29 Panasonic Intellectual Property Management Co., Ltd. Antenna and electric device
CN111542966A (en) * 2018-01-03 2020-08-14 三星电子株式会社 Display device and antenna assembly

Also Published As

Publication number Publication date
JP2012235224A (en) 2012-11-29

Similar Documents

Publication Publication Date Title
WO2012147817A1 (en) Electronic instrument
US11588223B2 (en) Electronic device with millimeter wave antennas on printed circuits
US10854968B2 (en) Electronic device antennas having split return paths
JP3941504B2 (en) Antenna device for high frequency radio equipment, high frequency radio equipment and watch type high frequency radio equipment
CN102709684B (en) Multi-element antenna structure with wrapped substrate
US9099771B2 (en) Resonating element for reducing radio-frequency interference in an electronic device
US8963794B2 (en) Distributed loop antennas
US9331391B2 (en) Mobile device
US10490902B2 (en) Mobile device
KR20120137088A (en) Antenna apparatus for portable terminal
GB2567938A (en) Electronic devices having shared antenna structures and split return paths
US11682828B2 (en) Integrated millimeter wave antenna modules
WO2013165700A1 (en) Corner bracket slot antennas
JP7252277B2 (en) dielectric resonator antenna module
US11853016B2 (en) Electronic device wide band antennas
KR20210128921A (en) Electronic devices having dielectric resonator antennas with parasitic patches
US9941574B2 (en) Television receiver and electronic apparatus
US11664601B2 (en) Electronic devices with coexisting antennas
JP2006020136A (en) Electronic apparatus equipped with antenna, antenna structure, and antenna adjustment method for electronic apparatus
US10181638B2 (en) Radiofrequency antenna device
US10950932B1 (en) Electronic device wide band antennas
US20130335292A1 (en) Circuit board having antenna structure
US11108130B1 (en) Electronic device slot antennas
JP7369919B2 (en) antenna device
US11056770B2 (en) Multi-antenna system and electronic device thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12777593

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12777593

Country of ref document: EP

Kind code of ref document: A1