WO2022209053A1 - Antenne multiple, dispositif de communication sans fil et système de suivi - Google Patents

Antenne multiple, dispositif de communication sans fil et système de suivi Download PDF

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Publication number
WO2022209053A1
WO2022209053A1 PCT/JP2021/046886 JP2021046886W WO2022209053A1 WO 2022209053 A1 WO2022209053 A1 WO 2022209053A1 JP 2021046886 W JP2021046886 W JP 2021046886W WO 2022209053 A1 WO2022209053 A1 WO 2022209053A1
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WIPO (PCT)
Prior art keywords
antenna
conductor
frequency band
operating frequency
wireless communication
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Application number
PCT/JP2021/046886
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English (en)
Japanese (ja)
Inventor
信樹 平松
洸 知識
泰宏 前田
隆行 白崎
Original Assignee
京セラ株式会社
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Filing date
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Publication of WO2022209053A1 publication Critical patent/WO2022209053A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements

Definitions

  • the present disclosure relates to multiple antennas, wireless communication devices, and tracking systems.
  • a dipole antenna As an antenna, for example, a dipole antenna is known (see Patent Document 1, for example).
  • the dipole antenna of Patent Document 1 has a radiating element and a reflecting element arranged in parallel inside a magnetic body.
  • the radiating element and the reflecting element have a folded dipole structure consisting of dipole elements with both ends folded.
  • antennas with two different frequency bands When using antennas with two different frequency bands, if the two antennas are placed close to each other, the antennas may interfere with each other. Moreover, antenna characteristics required for two different frequency band antennas are sometimes different.
  • An object of the present disclosure is to provide a multi-antenna, wireless communication device, and tracking system that support multi-bands.
  • a multi-antenna includes a columnar body extending in a first direction, a first antenna positioned above an end in the first direction along a side surface of the columnar body, and a a second antenna positioned above the first antenna and arranged in the first direction, wherein the first antenna is in a mode exhibiting artificial magnetic wall characteristics with respect to electromagnetic waves in a first operating frequency band;
  • the second antenna is configured to radiate electromagnetic waves, and the second antenna is in a mode exhibiting the artificial magnetic wall characteristics with respect to electromagnetic waves in a second operating frequency band different from the first operating frequency band, and radiates electromagnetic waves.
  • a wireless communication device includes a multi-antenna according to the present disclosure, and a controller configured to generate transmission signals to be transmitted from the multi-antenna.
  • a tracking system includes a plurality of wireless communication devices according to the present disclosure, and a management device that manages position information of the plurality of wireless communication devices.
  • FIG. 1 is a schematic diagram of a multi-antenna according to an embodiment.
  • 2 is a perspective view of an antenna according to one embodiment of the present disclosure
  • FIG. 3 is a partially exploded perspective view of the antenna shown in FIG. 2.
  • FIG. 4 is a cross-sectional view of the antenna shown in FIG. 2 along line AA.
  • FIG. 5 is a plan view schematically showing a current and an electric field when electromagnetic waves in the first frequency band are radiated.
  • FIG. 6 is a cross-sectional view of the state shown in FIG.
  • FIG. 7 is a diagram illustrating a configuration example of a multi-antenna according to the embodiment;
  • FIG. 8 is a graph showing changes in the coupling radiation efficiency of the multi-antenna according to the embodiment.
  • FIG. 9A is a diagram showing a radiation pattern of a multi-antenna when the first antenna is positioned on the bottom side of the columnar body.
  • FIG. 9B is a diagram showing the radiation pattern of the multi-antenna when the first antenna is positioned on the center side of the columnar body.
  • FIG. 10 is a block diagram showing a configuration example of a wireless communication device according to this embodiment.
  • FIG. 11 is a block diagram showing a configuration example of a wireless communication device according to this embodiment.
  • FIG. 1 is a schematic diagram of a multi-antenna according to an embodiment.
  • the multi-antenna 1a includes a first antenna 10a and a second antenna 10b.
  • the first antenna 10a and the second antenna 10b may be collectively referred to as the antenna 10 in some cases.
  • FIG. 2 is a perspective view of the antenna 10 according to one embodiment of the present disclosure.
  • FIG. 3 is a partially exploded perspective view of the antenna 10 shown in FIG.
  • FIG. 4 is a cross-sectional view of the antenna 10 shown in FIG. 2 along line AA.
  • the antenna 10 includes a base 20, a first connection conductor group 30, a second connection conductor group 34, a first conductor 40, a second conductor 50, and a feeder line 60.
  • the first connection conductor group 30, the second connection conductor group 34, the first conductor 40, the second conductor 50, and the feed line 60 may contain the same conductive material or may contain different conductive materials.
  • the antenna 10 can exhibit an artificial magnetic wall characteristic (Artificial Magnetic Conductor Character) with respect to electromagnetic waves of a predetermined frequency incident on the surface where the first conductor 40 is located from the outside.
  • an artificial magnetic wall characteristic Artificial Magnetic Conductor Character
  • artificial magnetic wall characteristics mean the characteristics of a surface where the phase difference between an incident wave and a reflected wave at one resonance frequency is 0 degrees.
  • Antenna 10 may have an operating frequency near at least one of the at least one resonant frequencies.
  • the phase difference between the incident wave and the reflected wave is smaller than the range of -90 degrees to +90 degrees in the operating frequency band.
  • the base 20 is configured to support the first conductor 40 .
  • the external shape of the base 20 may be a substantially rectangular parallelepiped shape corresponding to the shape of the first conductor 40 .
  • Substrate 20 may comprise a dielectric material. The dielectric constant of the substrate 20 may be adjusted as appropriate according to the desired resonance frequency of the antenna 10 .
  • the base 20 has an upper portion 21, side wall portions 22, and two pillar portions 23.
  • the base 20 may have one or three or more pillars 23 depending on the size of the antenna 10 and the like.
  • the base 20 may not have the pillars 23 depending on the size of the antenna 10 and the like.
  • the upper part 21 extends along the XY plane.
  • the upper portion 21 may have a substantially rectangular shape corresponding to the shape of the first conductor 40 .
  • the upper portion 21 may have any shape as long as it has a shape corresponding to the shape of the first conductor 40 .
  • the upper portion 21 includes two surfaces substantially parallel to the XY plane. One of the two faces included in the upper part 21 faces the outside of the base body 20 . The other faces the inside of the base body 20 .
  • the side wall portion 22 surrounds the outer peripheral portion of the substantially rectangular upper portion 21 .
  • the side wall portion 22 is connected to the outer peripheral portion of the upper portion 21 .
  • the side wall portion 22 extends from the outer peripheral portion of the upper portion 21 toward the second conductor 50 along the Z direction.
  • the area surrounded by upper portion 21 and side wall portion 22 is a cavity. However, at least part of the region surrounded by the upper portion 21 and the side wall portion 22 may be filled with a dielectric material or the like.
  • the pillar portion 23 is located within the area surrounded by the upper portion 21 and the side wall portion 22 .
  • the column portion 23 is positioned between the first conductor 40 and the second conductor 50 .
  • the column portion 23 is configured to maintain the spacing between the first conductor 40 and the second conductor 50 .
  • Each of the two pillars 23 may be configured to maintain the spacing between the first conductor 40 and the second conductor 50 at different positions.
  • the shape of the pillar 23 viewed in the Z direction may be cross-shaped.
  • the first connection conductor group 30 includes multiple first connection conductors 31 .
  • the first connection conductor group 30 includes two first connection conductors 31 .
  • the first connection conductor group 30 may include any number of first connection conductors 31 depending on the shape of the first conductors 40, for example.
  • the plurality of first connection conductors 31 are arranged in the X direction.
  • the intervals at which the plurality of first connection conductors 31 are arranged in the X direction may be substantially equal intervals.
  • the first connection conductor 31 may extend along the Z direction.
  • the first connection conductor 31 may be a columnar conductor.
  • the first connection conductor 31 is configured such that one end of the first connection conductor 31 is electrically connected to the first conductor 40 and the other end of the first connection conductor 31 is electrically connected to the second conductor 50. It can be.
  • the second connection conductor group 34 is aligned with the first connection conductor group 30 in the Y direction.
  • the second connection conductor group 34 includes a plurality of second connection conductors 35 .
  • the second connection conductor group 34 includes two second connection conductors 35 .
  • the second connection conductor group 34 may include any number of second connection conductors 35 depending on the shape of the first conductors 40, for example.
  • the plurality of second connection conductors 35 are arranged in the X direction.
  • the interval at which the second connection conductors 35 are arranged in the X direction may be substantially equal to the interval at which the first connection conductors 31 are arranged in the X direction.
  • the second connection conductor 35 may run along the Z direction.
  • the second connection conductor 35 may be a columnar conductor.
  • the second connecting conductor 35 is configured such that one end of the second connecting conductor 35 is electrically connected to the first conductor 40 and the other end of the second connecting conductor 35 is electrically connected to the second conductor 50. It can be.
  • the first conductor 40 is configured to function as a resonator.
  • the first conductor 40 extends along the XY plane.
  • a first conductor 40 is located on the upper portion 21 of the substrate 20 .
  • the first conductor 40 may be positioned on the surface facing the inside of the base 20 , of the two surfaces included in the upper portion 21 and substantially parallel to the XY plane.
  • the first conductor 40 may be a flat conductor.
  • the shape of the first conductor 40 may be substantially rectangular. Short sides of the substantially rectangular first conductor 40 extend along the X direction. The long side of the substantially rectangular first conductor 40 extends along the Y direction.
  • the first conductor 40 includes a third conductor 41-1, a third conductor 41-2, and connection portions 43a, 43b, 43c, 43d, 43e, and 43f. However, the first conductor 40 does not have to include the connecting portions 43a, 43b, 43c, 43d, 43e, and 43f.
  • the third conductor 41-1 and the third conductor 41-2 are not particularly distinguished, they are collectively referred to as the "third conductor 41".
  • the third conductor 41 and the connecting portions 43a-43f may contain the same conductive material, or may contain different conductive materials.
  • the third conductor 41 may be substantially rectangular.
  • the third conductor 41 includes four corners.
  • the third conductor 41 includes two sides along the X direction and two sides along the Y direction.
  • the third conductor 41-1 has a gap 42-1.
  • the third conductor 41-2 has a gap 42-2.
  • the gap 42 extends from the central portion of one of the two sides along the Y direction of the third conductor 41 toward the central portion of the other side.
  • the gap 42 extends along the X direction.
  • a portion of the column portion 23 on the Z-axis positive direction side may be positioned in a portion near the center of the gap 42 along the X direction.
  • the width of gap 42 may be adjusted appropriately according to the desired operating frequency of antenna 10 .
  • the third conductor 41-1 and the third conductor 41-2 are arranged in the Y direction.
  • One side of the third conductor 41-1 along the X direction on the positive Y-axis side and one side along the X direction on the negative Y-axis side of the third conductor 41-2 are integrated.
  • Two of the four corners of the third conductor 41-1 on the positive Y-axis side and two of the four corners of the third conductor 41-2 on the negative Y-axis side is integrated.
  • the connecting portions 43a and 43b are located at two corners of the third conductor 41-1 on the Y-axis negative direction side.
  • the connection portions 43 a and 43 b are configured to be electrically connected to the first connection conductor 31 respectively.
  • the shape of the connection portions 43 a and 43 b may be a rounded shape corresponding to the first connection conductor 31 .
  • the two corners of the third conductor 41-1 on the Y-axis negative direction side are configured to be electrically connected directly to the first connection conductor 31. may be
  • the connecting portions 43e and 43f are located at two corners of the third conductor 41-2 on the positive direction side of the Y axis.
  • the connection portions 43e and 43f are configured to be electrically connected to the second connection conductors 35, respectively.
  • the shape of the connection portions 43 e and 43 f may be a rounded shape corresponding to the second connection conductor 35 .
  • the two corners of the third conductor 41-2 on the positive Y-axis side are configured to be electrically connected directly to the second connection conductor 35. It can be.
  • the first conductor 40 is configured to capacitively connect the first connection conductor group 30 and the second connection conductor group 34 .
  • the third conductor 41-1 is electrically connected to the first connection conductor 31 by connection portions 43a and 43b.
  • the third conductor 41-2 is configured to be electrically connected to the second connection conductor 35 by connection portions 43e and 43f.
  • the first connection conductor group 30 and the second connection conductor group 34 can be capacitively connected via the gap 42-1 between the third conductors 41-1 and the gap 42-2 between the third conductors 41-2. .
  • the second conductor 50 is configured to provide a reference potential in the antenna 10 .
  • Second conductor 50 may be configured to be electrically connected to the ground of the device comprising antenna 10 .
  • the second conductor 50 is located on the Z-axis negative direction side of the base 20, as shown in FIG.
  • Various components of the device comprising the antenna 10 may be located on the negative Z-axis side of the second conductor 50 .
  • the antenna 10 can maintain the radiation efficiency at the operating frequency by having the artificial magnetic wall characteristics described above even if the various parts are positioned on the Z-axis negative direction side of the second conductor 50 .
  • the second conductor 50 extends along the XY plane, as shown in FIG.
  • the second conductor 50 may be a flat conductor.
  • the second conductor 50 is separated from the first conductor 40 in the Z direction.
  • the second conductor 50 may face the first conductor 40 .
  • the second conductor 50 may have a substantially rectangular shape corresponding to the shape of the first conductor 40 .
  • the second conductor 50 may have any shape corresponding to the shape of the first conductor 40 .
  • Short sides of the substantially rectangular second conductor 50 extend along the X direction.
  • the long side of the substantially rectangular second conductor 50 extends along the Y direction.
  • the second conductor 50 may have an opening 50A depending on the structure of the feeder line 60 .
  • the second conductor 50 includes a fourth conductor 51-1 and a fourth conductor 51-2.
  • fourth conductor 51-1 and the fourth conductor 51-2 are not particularly distinguished, they are collectively referred to as the "fourth conductor 51".
  • the fourth conductor 51 may be substantially rectangular.
  • the substantially rectangular fourth conductor 51 includes four corners.
  • the fourth conductor 51-1 faces the third conductor 41-1.
  • the fourth conductor 51-2 faces the third conductor 41-2.
  • One side along the X direction on the positive Y-axis side of the fourth conductor 51-1 and one side along the X direction on the negative Y-axis side of the fourth conductor 51-2 are integrated.
  • Two of the four corners of the fourth conductor 51-1 on the positive side of the Y-axis and two of the four corners of the fourth conductor 51-2 on the negative side of the Y-axis is integrated.
  • the second conductor 50 is configured to be electrically connected to the first connection conductor group 30 .
  • the two corners on the Y-axis negative direction side are configured to be electrically connected to the first connection conductors 31, respectively.
  • the second conductor 50 is configured to be electrically connected to the second connection conductor group 34 .
  • the two corners on the Y-axis positive direction side are configured to be electrically connected to the second connection conductors 35, respectively.
  • a part of the feeder line 60 extends along the Z direction.
  • the feed line 60 may be a columnar conductor.
  • a portion of the feed line 60 may be located within the area bounded by the top portion 21 and the side wall portion 22 .
  • the feeder line 60 is configured to be electromagnetically connected to the first conductor 40 .
  • electromagnetic connection may be electrical connection or magnetic connection.
  • one end of the feed line 60 may be configured to be electrically connected to the first conductor 40 .
  • the other end of the feeder line 60 may extend outside from the opening 50A of the second conductor 50 shown in FIG.
  • the other end of the power supply line 60 may be configured to be electrically connected to an external device or the like.
  • the feed line 60 is configured to feed power to the first conductor 40 .
  • the power supply line 60 is configured to supply electric power from the first conductor 40 to an external device or the like.
  • FIG. 5 is a plan view schematically showing the current L1 and the electric field E when the electromagnetic wave in the first frequency band is radiated.
  • FIG. 5 shows the direction of the electric field E viewed from the positive side of the Z-axis at a given moment.
  • the solid line current L1 indicates the direction of the current flowing through the first conductor 40 viewed from the Z-axis positive direction at a given moment.
  • a dashed current L1 indicates the direction of the current flowing through the second conductor 50 viewed from the Z-axis positive direction at a given moment.
  • FIG. 6 is a cross-sectional view of the state shown in FIG.
  • a current L1 can be excited by appropriately feeding power from the feeder line 60 to the first conductor 40 .
  • Antenna 10 is configured to radiate electromagnetic waves in the first frequency band by means of current L1.
  • the first frequency band is one of the operating frequency bands of antenna 10 .
  • the current L1 can be a loop current that flows along the loop.
  • the loop may include a first group of connecting conductors 30 , a second group of connecting conductors 34 , a first conductor 40 and a second conductor 50 .
  • a loop may include a first connecting conductor 31, a second connecting conductor group 34, a third conductor 41-1, and a fourth conductor 51-1.
  • the current L1 can be regarded as one macroscopic loop current.
  • This macroscopic loop current can be regarded as flowing along a loop including the first connection conductor group 30 , the second connection conductor group 34 , the first conductor 40 and the second conductor 50 .
  • the direction of the electric field near the first connection conductor group 30 generated by this macroscopic loop current and the direction of the electric field near the second connection conductor group 34 generated by this macroscopic loop current can be opposite. For example, as shown in FIG. 5, when the direction of the electric field near the first connection conductor group 30 is the Z-axis positive direction, the direction of the electric field near the second connection conductor group 34 can be the Z-axis negative direction.
  • the first connection conductor group 30 and the second connection conductor group 34 can function as a pair of electric walls when viewed from the first conductor 40 as a resonator.
  • the YZ plane on the X-axis positive direction side and the YZ plane on the X-axis negative direction side as viewed from the first conductor 40 as a resonator can function as a pair of magnetic walls due to the macroscopic loop current. . Since the first conductor 40 is surrounded by the pair of electric walls and the pair of magnetic walls, the antenna 10 is protected against electromagnetic waves in the first frequency band incident on the first conductor 40 from the outside. Indicates wall properties.
  • the first antenna 10a and the second antenna 10b have the same configuration.
  • the first antenna 10a and the second antenna 10b are configured in a substantially rectangular shape.
  • the first antenna 10a and the second antenna 10b are arranged in the first direction.
  • the first antenna 10a and the second antenna 10b are arranged so that the electric wall of the first antenna 10a and the electric wall of the second antenna 10b face each other.
  • two antennas 10, a first antenna 10a and a second antenna 10b are arranged side by side, but the present disclosure is not limited to this.
  • three or more antennas 10 may be side by side.
  • the antennas 10 may be arranged so that the electric walls face each other.
  • the distance L between the first antenna 10a and the second antenna 10b is set according to the first operating frequency band.
  • the distance L between the first antenna 10a and the second antenna 10b is preferably ⁇ /4 or less, where ⁇ is the lowest operating frequency in the first operating frequency band.
  • the operating frequency band differs between the first antenna 10a and the second antenna 10b.
  • the operating frequency band of the first antenna 10a is called the first operating frequency band.
  • the operating frequency band of the second antenna 10b is called the second operating frequency band.
  • the first antenna 10a is configured, for example, to receive GPS signals from GPS (Global Positioning System) satellites (not shown).
  • GPS Global Positioning System
  • the first operating frequency band may be the 1590 MHz (Mega Hertz) band.
  • the first operating frequency band may be other frequency bands.
  • the second antenna 10b is configured to receive, for example, LTE-M (Long Term Evolution for Machine-type-communication) signals as a communication standard.
  • LTE-M Long Term Evolution for Machine-type-communication
  • the second operating frequency band may be the 850 MHz band.
  • the second operating frequency band may be other frequency bands.
  • the first operating frequency band and the second operating frequency band can each be, for example, several hundred MHz band to several tens of GHz (Giga Hertz) band.
  • the first antenna 10a and the second antenna 10b are respectively 2G (second generation mobile communication system), 3G (third generation mobile communication system), 4G (fourth generation mobile communication system), 5G (fifth generation mobile communication system), LTE-FDD (Frequency Division Duplex), LTE-TDD (Time Division Duplex), LTE-Advanced, and LTE-Advanced Pro.
  • the isolation between the first antenna 10a and the second antenna 10b is 20 dB or more. Therefore, it can be said that there is no difference in the radiation efficiency of the second antenna 10b between the case where the first antenna 10a is arranged close to the second antenna 10b and the case where it is not arranged. That is, it can be said that the isolation between the first antenna 10a and the second antenna 10b is sufficiently ensured.
  • the first antenna 10a and the second antenna 10b are arranged linearly adjacent to each other with their electric walls facing each other. Thereby, the first antenna 10a and the second antenna 10b can exhibit high antenna efficiency without coupling. Therefore, the multi-band antenna 1a can be miniaturized.
  • FIG. 7 explains a configuration example of a multi-antenna according to the embodiment.
  • FIG. 7 is a diagram illustrating a configuration example of a multi-antenna according to the embodiment;
  • the multi-antenna 1 includes a first antenna 10a, a second antenna 10b, and a columnar body 12.
  • the columnar body 12 is configured to extend in the first direction.
  • the pillars 12 may be made of metal.
  • the metal is not particularly limited.
  • the columnar bodies 12 are cylinders, but the present disclosure is not limited to this.
  • the columnar body 12 may be a prism.
  • the ZX plane of columnar body 12 can be the bottom surface or the zenith surface.
  • the first antenna 10 a and the second antenna 10 b can be positioned on the side surface of the columnar body 12 .
  • the first antenna 10a is positioned on the end side of the columnar body 12
  • the second antenna 10b is positioned on the columnar side. It is preferably located on the central side of body 12 .
  • FIG. 8 is a graph showing changes in the coupling radiation efficiency of the multi-antenna according to the embodiment.
  • the horizontal axis indicates frequency [GHz]
  • the vertical axis indicates coupling radiation efficiency [dB].
  • a graph G1 shows the coupling radiation efficiency when the second antenna 10b is positioned on the center side of the side surface of the columnar body 12.
  • FIG. A graph G2 shows the radiation efficiency when the second antenna 10b is positioned on the end side of the side surface of the columnar body 12.
  • FIG. As shown in graphs G1 and G2, the coupling radiation characteristics from 0.75 [GHz] to 0.95 [GHz] with 0.85 [GHz] as the center are 0.5 [dB] to It shows that the characteristic is good by about 1 [dB]. That is, by positioning the second antenna 10b near the center of the side surface of the columnar body 12, high antenna efficiency can be obtained.
  • the first antenna 10a when using the multi-antenna 1 with the columnar body 12 upright, it is preferable to position the first antenna 10a on the bottom side of the columnar body 12 . In other words, when using the multi-antenna 1 with the columnar body 12 standing, it is preferable to position the first antenna 10a on the ground side.
  • a high gain can be obtained in the zenith direction (-Y direction) by arranging the first antenna 10a on the edge on the ground side and locating the second antenna 10b on the first antenna 10a.
  • FIG. 9A is a diagram showing the radiation pattern of the multi-antenna 1 when the first antenna 10a is positioned on the bottom side of the columnar body 12.
  • FIG. 9B is a diagram showing the radiation pattern of the multi-antenna 1 when the first antenna 10a is positioned on the center side of the columnar body 12. As shown in FIG.
  • the gains at the positions of points P1 and P2 in the -90° direction respectively indicate the gains of the multi-antenna 1 in the zenith direction.
  • the gain in the zenith direction when the first antenna 10a is positioned on the bottom side of the columnar body 12 is about 2.2 [dBi].
  • the gain in the zenith direction when the first antenna 10a is positioned on the center side of the columnar body 12 is about 0.8 [dBi]. That is, by locating the first antenna 10a on the bottom side of the columnar body 12, a high gain can be obtained in the zenith direction of the multi-antenna 1.
  • two antennas 10, a first antenna 10a and a second antenna 10b are arranged side by side on the side surface of the columnar body 12, but the present disclosure is not limited to this.
  • Three or more antennas 10 may be arranged side by side on the columnar body 12 .
  • each antenna 10 may be arranged on the side surface of the columnar body 12 so that the electric walls face each other. If three or more antennas 10 are lined up on the side of column 12 and a GPS antenna is included, the GPS antenna may be positioned closest to the end. In this case, it is better to arrange them on the GPS antenna in descending order of the operating frequency band.
  • FIG. 10 is a block diagram showing a configuration example of a wireless communication device according to this embodiment.
  • a wireless communication device 100 As shown in FIG. 10, a wireless communication device 100, a multi-antenna 1, a memory 2, a controller 3, a sensor 4, and a battery 5 are provided.
  • the memory 2 may include, for example, a semiconductor memory. Memory 2 may be configured to function as a work memory for controller 3 . Memory 2 may be included in controller 3 . The memory 2 stores a program describing processing details for realizing each function of the wireless communication device 100, information used in the wireless communication device 100, and the like.
  • the controller 3 may include, for example, a processor. Controller 3 may include one or more processors.
  • the processor may include a general-purpose processor that loads a specific program to execute a specific function, and a dedicated processor that specializes in specific processing.
  • a dedicated processor may include an application specific IC. Application-specific ICs are also called ASICs (Application Specific Integrated Circuits).
  • a processor may include a programmable logic device. A programmable logic device is also called a PLD (Programmable Logic Device).
  • the PLD may include an FPGA (Field-Programmable Gate Array).
  • the controller 3 may be either SoC (System-on-a-Chip) or SiP (System in a Package) in which one or more processors cooperate.
  • the controller 3 may store various kinds of information or programs for operating each component of the wireless communication device 100 in the memory 2 .
  • the controller 3 may be configured to generate transmission signals to be transmitted from the wireless communication device 100 .
  • Controller 3 may, for example, be configured to obtain measurement data from sensor 4 .
  • the controller 3 may be arranged to generate a transmission signal responsive to the measured data.
  • the controller 3 may be arranged to transmit baseband signals to the multiple antennas 1 .
  • the sensor 4 includes various sensors.
  • the sensor 4 includes, for example, a speed sensor, a vibration sensor, an acceleration sensor, a gyro sensor, a rotation angle sensor, an angular velocity sensor, a geomagnetic sensor, a magnet sensor, a temperature sensor, a humidity sensor, an atmospheric pressure sensor, an optical sensor, an illuminance sensor, a UV sensor, and a gas sensor.
  • gas concentration sensor atmosphere sensor, level sensor, smell sensor, pressure sensor, air pressure sensor, contact sensor, wind sensor, infrared sensor, motion sensor, displacement sensor, image sensor, weight sensor, smoke sensor, leak sensor, Vital sensors, battery level sensors, ultrasonic sensors, and the like may be included.
  • the battery 5 may be configured to power the wireless communication device 100 .
  • Battery 5 may be configured to power at least one of memory 2 , controller 3 and sensor 4 .
  • Battery 5 may include at least one of a primary battery and a secondary battery.
  • a negative electrode of the battery 5 can be configured to be electrically connected to a ground terminal of a circuit board (not shown).
  • FIG. 11 is a diagram illustrating a configuration example of a tracking system according to the embodiment.
  • the tracking system 300 includes a wireless communication device 100 1 , a wireless communication device 100 2 , . include.
  • the wireless communication devices 100-1 to 100 - n and the management apparatus 200 are connected via a network N so as to be communicable.
  • Each of the wireless communication devices 100-1 to 100 - n is configured to detect location information indicating its own current location.
  • Each of the wireless communication devices 100-1 to 100 - n is configured to transmit the detected location information to the management apparatus 200 via the network N.
  • the management device 200 is configured to receive location information from each of the wireless communication devices 100-1 to 100 - n via the network N.
  • the management device 200 is configured to manage the location information of each of the wireless communication devices 100-1 to 100 - n .
  • the present invention is not limited by the contents of these embodiments.
  • the components described above include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within the so-called equivalent range.
  • the components described above can be combined as appropriate.
  • various omissions, replacements, or modifications of components can be made without departing from the gist of the above-described embodiments.

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Abstract

L'invention concerne une antenne multiple (1) comprenant : un corps en colonne (12) s'étendant dans une première direction ; une première antenne (10a) positionnée au niveau d'une extrémité dans la première direction le long d'une surface latérale du corps en colonne ; et une seconde antenne (10b) positionnée au-dessus de la première antenne (10a) le long de la surface latérale du corps en colonne de façon à être alignée dans la première direction. La première antenne (10a) est configurée pour rayonner des ondes électromagnétiques lors de l'entrée dans un mode dans lequel des caractéristiques de paroi magnétique artificielle sont présentées pour des ondes électromagnétiques qui se trouvent dans une première bande de fréquences de fonctionnement. La seconde antenne (10b) est configurée pour rayonner des ondes électromagnétiques lors de l'entrée dans un mode dans lequel des caractéristiques de paroi magnétique artificielle sont présentées pour des ondes électromagnétiques qui se trouvent dans une seconde bande de fréquences de fonctionnement différente de la première bande de fréquences de fonctionnement.
PCT/JP2021/046886 2021-03-29 2021-12-17 Antenne multiple, dispositif de communication sans fil et système de suivi WO2022209053A1 (fr)

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JP2021056309A JP2022153198A (ja) 2021-03-29 2021-03-29 マルチアンテナ、無線通信デバイス、およびトラッキングシステム

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012063913A1 (fr) * 2010-11-12 2012-05-18 戸田工業株式会社 Antenne dipôle replié et étiquette d'identification par radiofréquence mettant en œuvre une antenne dipôle replié
WO2018174026A1 (fr) * 2017-03-21 2018-09-27 京セラ株式会社 Structure, antenne, module de communication sans fil et dispositif de communication sans fil
WO2019142677A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, dispositif de communication sans fil, système de communication sans fil, véhicule, motocyclette et corps mobile
WO2019142676A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, bicyclette, dispositif d'affichage et véhicule aérien sans pilote
WO2019142673A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, module de communication et réverbère

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012063913A1 (fr) * 2010-11-12 2012-05-18 戸田工業株式会社 Antenne dipôle replié et étiquette d'identification par radiofréquence mettant en œuvre une antenne dipôle replié
WO2018174026A1 (fr) * 2017-03-21 2018-09-27 京セラ株式会社 Structure, antenne, module de communication sans fil et dispositif de communication sans fil
WO2019142677A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, dispositif de communication sans fil, système de communication sans fil, véhicule, motocyclette et corps mobile
WO2019142676A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, bicyclette, dispositif d'affichage et véhicule aérien sans pilote
WO2019142673A1 (fr) * 2018-01-22 2019-07-25 京セラ株式会社 Antenne, module de communication et réverbère

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