WO2012070242A1 - 無線機 - Google Patents
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- Publication number
- WO2012070242A1 WO2012070242A1 PCT/JP2011/006534 JP2011006534W WO2012070242A1 WO 2012070242 A1 WO2012070242 A1 WO 2012070242A1 JP 2011006534 W JP2011006534 W JP 2011006534W WO 2012070242 A1 WO2012070242 A1 WO 2012070242A1
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- WIPO (PCT)
- Prior art keywords
- conductor
- ground
- circuit board
- radiation conductor
- radiation
- Prior art date
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Classifications
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- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
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- 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
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2233—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in consumption-meter devices, e.g. electricity, gas or water meters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- 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
Definitions
- the present invention relates to a wireless device, and more particularly, to a wireless device attached to a meter box that houses a gas meter, a power meter, a water meter, and the like.
- an automatic meter reading system has been introduced in which the amount of gas, electricity, water, etc. used is measured with a meter installed in a building such as a house, and this measurement data is collected by wireless communication.
- a small radio with a built-in antenna is required from the viewpoint of easy installation in a meter box.
- Examples of such a radio device include a radio device including a board-mounted plate antenna in which a ground conductor plate and a short-circuit conductor of a radiating conductor portion are connected via a wiring pattern of a printed circuit board.
- the ground conductor plate is used as the ground of the radiation conductor portion, and is provided between the radiation conductor plate and the printed circuit board (see, for example, Patent Document 1).
- the longitudinal conductor is provided on the printed circuit board so as to face the printed circuit board.
- a ground pattern is arranged on the printed circuit board, and a part of the ground pattern in the region facing the longitudinal conductor is removed.
- the longitudinal conductor portion is electrically connected to the ground pattern via the grounding conductor portion, and is electrically connected to the feeding point of the printed circuit board via the feeding conductor portion. For this reason, a ground pattern is disposed between the printed circuit board and the longitudinal conductor portion in the vicinity of the ground conductor portion (see, for example, Patent Document 2).
- an automatic meter reading radio including a radio
- the radio and the plate antenna are accommodated in a resin casing, and the radio is arranged in a metal casing.
- the plate-like antenna is connected to the metal case by a metal material connecting portion, and the metal case is used as the ground of the plate-like antenna.
- a power feeding unit is provided between the metal casing and the plate antenna (for example, see Patent Document 3).
- the antenna is affected by the surrounding metal, and the antenna characteristics such as gain and radiation efficiency are degraded.
- a radio including a conventional board-mounted plate antenna if the size of the grounding conductor serving as the ground of the radiation conductor is large, deterioration of antenna characteristics due to metal can be prevented, but the size of the radio itself is increased. .
- the antenna characteristics deteriorate due to the influence of surrounding metal.
- a radio including a board-mounted plate antenna is attached to a metal surface, a printed circuit board, a ground conductor portion, and a radiation conductor portion are arranged in this order on the metal surface.
- the printed circuit board is disposed between the ground conductor portion and the metal surface, and the distance between the ground conductor portion and the metal surface is increased. Therefore, the antenna impedance increases due to the influence of the metal surface, and the characteristics of the antenna deteriorate.
- the conventional wireless communication device is the same as the wireless device including the conventional board-mounted plate antenna.
- the metal housing used as the ground for the plate antenna is smaller than the size corresponding to the wavelength of the high-frequency signal supplied to the antenna. Big. For this reason, the plate antenna is not easily affected by the metal surface.
- it is necessary to provide a large metal casing in the vicinity of the plate antenna which increases the size of the wireless device, increases the number of components, and increases the product cost.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a small radio device that suppresses deterioration of antenna characteristics due to metal.
- a radio includes a radiation conductor that converts a high-frequency signal into a radio wave and radiates, and an electric circuit that is electrically connected to the radiation conductor and supplies the high-frequency signal to the radiation conductor.
- a circuit board that is mounted; a planar ground conductor that is electrically connected to the electrical circuit of the circuit board, faces the radiation conductor, and constitutes a ground of the radiation conductor; the radiation conductor; and the circuit And a resin housing that houses the substrate and the ground conductor.
- the ground conductor, the circuit board, and the radiation conductor are arranged in this order in the thickness direction of the circuit board.
- the present invention has an effect that it is possible to provide a small-sized radio device having the above-described configuration and suppressing a decrease in antenna characteristics due to metal.
- a radio includes a radiation conductor that converts a high-frequency signal into a radio wave and radiates, and an electric circuit that is electrically connected to the radiation conductor and supplies the high-frequency signal to the radiation conductor.
- the ground conductor, the circuit board, and the radiation conductor are arranged in this order in the thickness direction of the circuit board.
- the ground conductor, the circuit board, and the radiation conductor are arranged in this order in the thickness direction of the circuit board, and the ground conductor constitutes the ground of the radiation conductor.
- the distance between the ground conductor and the radiation conductor can be made as large as possible, the frequency bandwidth of the antenna is widened, and the characteristics of the antenna are excellent.
- the ground conductor is closest to the metal surface in the radio device.
- interval of a grounding conductor and a metal surface is narrow and these are electrically couple
- the ground conductor and a surface of the housing facing the ground conductor may be arranged in parallel to each other.
- the ground conductor when the casing is attached in parallel to the metal surface such that the surface of the casing facing the ground conductor faces the metal surface, the ground conductor is disposed in parallel to the metal surface. Therefore, the ground conductor can be brought close to the metal surface uniformly, and the entire ground conductor can be electrically coupled to the metal surface, so that deterioration of radiation efficiency can be further improved.
- the radiation conductor, the ground conductor, and the circuit board may be arranged in parallel to each other.
- the radio device can be miniaturized.
- the radiation conductor may be a planar conductor element.
- the radiation conductor may be constituted by a plate-like inverted F antenna.
- a planar conductor element such as a plate-like inverted antenna is used as the radiation conductor, so that the size of the radiation conductor can be reduced with respect to the wavelength of the operating frequency.
- the wireless device electrically connects the electric circuit of the circuit board and the radiation conductor, and supplies a high-frequency signal from the circuit board to the radiation conductor; and a ground portion of the electric circuit of the circuit board; Electrically connecting the radiating conductor, electrically connecting the ground conductor and the ground portion of the electric circuit of the circuit board, and a short-circuit terminal for grounding the radiating conductor to the ground portion of the electric circuit, You may further provide the ground terminal arrange
- the radiation conductor is electrically connected to the ground conductor via the short-circuit terminal and the ground terminal, and the ground conductor is not directly connected to the radiation conductor. For this reason, even if the ground conductor is attached to the metal surface, the ground conductor is separated from the metal surface, so that the antenna is not easily affected by the metal, and deterioration of radiation efficiency is suppressed.
- the ground terminal is connected in the vicinity of the short-circuited terminal in the ground part of the electric circuit of the circuit board, the loss of power can be reduced due to the short distance that the current flows between them, thereby preventing the reduction of radiation efficiency. Can be done.
- the radiation conductor may be configured by wiring formed on a main surface far from the ground conductor among the pair of main surfaces of the circuit board.
- the wiring included in the circuit board is used as a radiation conductor, thereby reducing the number of components, reducing the size of the wireless device, and reducing the product cost.
- the radiation conductor may be a linear conductor element.
- the radiation conductor is constituted by a linear conductor element, the antenna characteristics similar to those of the planar conductor element can be obtained.
- a conductor layer as the ground conductor may be formed on a main surface far from the radiation conductor among the pair of main surfaces of the circuit board.
- a layer including the electric circuit may be formed on a main surface closer to the radiation conductor among a pair of main surfaces of the circuit board.
- the conductor layer as the ground conductor is formed on the circuit board, and the conductor layer, the layer including the electric circuit, and the radiation conductor are overlapped in this order.
- the conductor layer is brought closest to the metal surface in the radio.
- interval of a conductor layer and a metal surface is narrow and these can be electrically couple
- the conductor layer of the circuit board is used as the ground for the radiation conductor, the radio is downsized, the number of parts is reduced, and the cost is reduced.
- the casing may include a container-like main body having an opening and a lid that closes the opening of the main body.
- a linear conductor element surrounding the opening is disposed on one of the main body and the lid.
- the radiation conductor, the circuit board, and the ground conductor are accommodated in the main body so that the radiation conductor is positioned in the vicinity of the opening.
- the radiation conductor is disposed in the vicinity of the opening of the first casing, and the linear conductor element surrounds the opening, so that the linear conductor element is positioned in the vicinity of the radiation conductor. Therefore, since the linear conductor element and the radiation conductor can be electrically coupled, high radiation efficiency can be obtained even with a wireless device that is sufficiently small with respect to the wavelength of the frequency of the radiated radio wave.
- FIG. 17 is a block diagram showing a configuration of radio apparatus 100 according to the first embodiment of the present invention.
- the radio device 100 includes a radiation conductor 101, a circuit board 102, and a ground conductor 103.
- the radiation conductor 101 converts a high-frequency signal into a radio wave and radiates it.
- an electric circuit for wireless communication is mounted on the circuit board 102.
- This electric circuit includes, for example, an integrated circuit.
- the integrated circuit for wireless communication is electrically connected to the radiation conductor 101, and supplies a high-frequency signal to the radiation conductor 101 in accordance with data from the integrated circuit for data collection.
- the ground conductor 103 has a planar shape and is electrically connected to the ground portion of the electric circuit of the circuit board 102.
- the ground conductor 103 faces the radiation conductor 101 and constitutes the ground of the radiation conductor 101.
- the radiation conductor 101, the circuit board 102, and the ground conductor 103 are arranged in this order in the thickness direction of the circuit board 102, and are housed in a resin casing 104.
- an integrated circuit for wireless communication when data such as a meter measurement value is acquired, an integrated circuit for wireless communication creates a high-frequency signal in accordance with this data, and gives this to the radiation conductor 101.
- the radiation conductor 101 converts a high frequency signal into a radio wave and radiates it.
- the radiation conductor 101, the ground conductor 103, and the circuit board 102 are arranged in this order in the thickness direction of the circuit board 102 in the casing 104.
- the radiating conductor 101 and the ground conductor 103 are arranged so as to be separated as much as possible. Therefore, when the distance between the radiation conductor 101 and the ground conductor 103 is increased, the frequency bandwidth of the antenna is increased and the characteristics of the antenna are excellent.
- the wireless device 100 when the wireless device 100 is installed on a metal surface such that the ground conductor 103 is on the metal surface side, the ground conductor 103 comes close to the metal surface. For this reason, the ground conductor 103 and the metal surface are metallicly coupled, and the metal surface functions in addition to the ground conductor 103 as the ground of the radiation conductor 101, so that the size of the ground conductor 103 is smaller than the wavelength of the operating frequency.
- the antenna impedance does not increase. Therefore, even if the radio device 100 is small, deterioration of antenna characteristics due to metal can be suppressed.
- FIG. 1 is a perspective view showing a meter box 200 equipped with a radio device 100 according to the second embodiment of the present invention.
- the meter box 200 is a box containing a meter for measuring the usage amount of gas, electricity, tap water and the like.
- the meter box 200 is made of metal, and a display unit 201 is provided on the front wall of the meter box 200.
- the radio device 100 is attached to the front wall of the meter box 200.
- the radio device 100 is a specific example of the specific structure of the radiation conductor 101, the circuit board 102, and the ground conductor 103 of the first embodiment.
- the wireless device 100 is a device that transmits data measured by a meter to a meter-reading terminal carried by a meter-reader of a supplier such as gas, electricity, and tap water by wireless communication.
- the wireless device 100 has a thin rectangular parallelepiped housing 104 and is attached to the meter box 200 with an attachment such as a screw, a double-sided tape, or a hook.
- the surface of the second housing 104b of the housing 104 faces the same direction as the front wall of the meter box 200, and the first housing 104a faces the front wall of the meter box 200.
- the first housing 104a and the front wall of the meter box 200 may be in contact with each other or may be provided at a small interval. However, as will be described later, these intervals may be any distance where the ground conductor 103 and the front wall of the meter box 200 are in the vicinity and are metallically coupled.
- the radio device 100 includes a circuit and a program for acquiring measurement values from the meter box 200.
- the method for acquiring the measurement value is not particularly limited.
- the measured value can be obtained by counting the pulse waveform output from the meter box 200 and measuring the flow rate of gas or the like with the wireless device 100.
- a mechanism in which the magnet is displaced according to the flow rate is incorporated in the meter box 200, and the measured value can be obtained by detecting the displacement of the magnet with the wireless device 100.
- a measurement value can be obtained by further providing a unit for converting the movement of the magnet that is displaced according to the flow rate into a pulse waveform, and counting the pulse waveform from this unit with the wireless device 100.
- the radio device 100 having a mechanism for counting the flow rate may be electrically connected to the meter box 200 by a harness or the like, and obtain a pulse waveform via the harness. Further, the radio device 100 may detect the pulse waveform using a reed switch or the like that is not connected to the meter box 200.
- FIG. 2 is an exploded perspective view of the wireless device 100.
- FIG. 3 is a perspective view showing the radiation conductor 101, the circuit board 102, and the ground conductor 103 in the wireless device 100.
- FIG. 4 is a schematic view of the radiation conductor 101, the circuit board 102, and the ground conductor 103 as viewed from the rear side.
- FIG. 5 is a schematic view of the radiation conductor 101, the circuit board 102, and the ground conductor 103 as viewed from the left side.
- FIG. 6 is a schematic view of the radiation conductor 101, the circuit board 102, and the ground conductor 103 as viewed from above. The up / down, front / rear and left / right directions are indicated by arrows in FIGS.
- the housing 104 is made of an electrically insulating resin such as polypropylene or ABS.
- the housing 104 includes a first housing 104a and a second housing 104b.
- the first housing 104a is formed in a container shape having an opening. Here, one surface is formed in a rectangular parallelepiped shape.
- the second housing 104b is formed so as to cover (close) the opening of the first housing 104a, and is formed in a planar shape, for example.
- the first housing 104a and the second housing 104b are bonded (joined) by bonding, welding, or screws, and the housing 104 is formed.
- a battery 105 and a circuit board 102 are incorporated in the housing 104.
- the battery 105 is a power source that supplies power to electronic components and the like mounted on the circuit board 102.
- the battery 105 is connected to the electric circuit of the circuit board 102 by wiring (not shown) or the like, and is arranged on the second housing 104b side from the circuit board 102.
- circuit board 102 electronic components constituting an electric circuit are attached to the surface of an insulating substrate, and the electronic components are connected by wiring such as copper foil or silver foil.
- the electronic component include an integrated circuit for wireless communication (hereinafter referred to as “wireless circuit”) 106 and an integrated circuit for controlling each component (hereinafter referred to as “control circuit”).
- wireless circuit an integrated circuit for wireless communication
- control circuit an integrated circuit for controlling each component
- the wireless circuit 106 includes a transmission circuit for transmitting data by wireless communication, a reception circuit for processing data received by non-new communication, a matching circuit for connecting them, and the like.
- the radiation conductor 101 and the ground conductor 103 are electrically connected to the electric circuit of the circuit board 102.
- the radiation conductor 101 converts a high-frequency signal from the circuit board 102 into a radio wave and radiates it, or receives a radio wave from the outside and converts it into a high-frequency signal.
- the radiation conductor 101 has a flat plate shape and is formed of a conductor such as copper.
- the radiation conductor 101 is provided with a plurality of slits. The number, size, position, etc. of the slits are adjusted according to the resonance frequency of the radio wave to be transmitted and received.
- the power supply terminal 107 and the short-circuit terminal 108 are disposed at one end of the radiation conductor 101, and the first support 109 is disposed at the other end.
- the power supply terminal 107 and the short-circuit terminal 108 are formed integrally with the radiation conductor 101, for example.
- each of the radiation conductor 101, the power supply terminal 107, and the short circuit terminal 108 is formed by bending a single metal plate having the shapes of the radiation conductor 101, the power supply terminal 107, and the short circuit terminal 108.
- the power feeding terminal 107 and the short-circuit terminal 108 are electrically connected to the radiation conductor 101, they may be separate. In this case, the power supply terminal 107 and the short-circuit terminal 108 are connected to the radiation conductor 101 by welding or the like.
- the feeding terminal 107 extends in a direction orthogonal to the radiation conductor 101.
- the power supply terminal 107 electrically connects the radiating conductor 101 and the radio circuit 106 on the circuit board 102, and supplies a high frequency signal from the radio circuit 106 to the radiating conductor 101.
- the short-circuit terminal 108 extends in a direction orthogonal to the radiation conductor 101 in parallel with the power supply terminal 107.
- the short-circuit terminal 108 grounds the radiation conductor 101 to a ground portion formed by wiring in an electric circuit on the circuit board 102.
- the widths of the power supply terminal 107 and the short-circuit terminal 108 and the distance between them are set to values that allow impedance matching between the radiation conductor 101 and the radio circuit 106.
- the power supply terminal 107 is connected to the radio circuit 106, and the short-circuit terminal 108 is connected to the ground portion of the circuit board 102 by solder.
- the connection method is not limited to this as long as they are electrically connected. For example, they may be connected via screws or connectors.
- the 1st support part 109 supports the radiation
- FIG. The first support portion 109 has an L shape and is formed of an electrically insulating resin or the like.
- the first support portion 109 is parallel to the short-circuit terminal 108 and the power supply terminal 107 and extends in a direction orthogonal to the radiation conductor 101, and is provided at a position diagonal to the short-circuit terminal 108 and the power supply terminal 107 in the radiation conductor 101.
- the radiation conductor 101 faces the circuit board 102 and is arranged parallel to the circuit board 102 with a space therebetween.
- the ground conductor 103 is opposed to the radiation conductor 101 and constitutes the ground of the radiation conductor 101.
- the ground conductor 103 has a flat plate shape and is formed of a conductor such as copper.
- the ground conductor 103 is provided on the opposite side of the radiation conductor 101 with the circuit board 102 interposed therebetween.
- a ground terminal 110 is disposed at one end portion of the ground conductor 103, and a second support portion 111 is disposed at the other end portion.
- the ground terminal 110 extends in a direction orthogonal to the ground conductor 103, and the ground terminal 110 electrically connects the ground conductor 103 and the ground portion of the electric circuit of the circuit board 102. As a result, the potential of the ground portion of the circuit board 102 is equal to the potential of the ground conductor 103.
- connection position between the ground terminal 110 and the ground portion of the circuit board 102 is arranged in the vicinity of the position where the short-circuit terminal 108 is grounded to the ground portion. For this reason, the short-circuit terminal 108 and the ground terminal 110 are not continuous and are provided at intervals.
- the distance s (FIG. 11) between the connection position of the short-circuit terminal 108 and the connection position of the ground terminal 110 is, for example, 1/20 or less of the wavelength of the radio wave emitted from the radiation conductor 101. It is desirable.
- the second support portion 111 supports the ground conductor 103 with respect to the circuit board 102 together with the ground terminal 110.
- the second support portion 111 is formed of an electrically insulating resin or the like and is not electrically connected to the ground terminal 110.
- the second support portion 111 is parallel to the ground terminal 110 and extends in a direction orthogonal to the radiation conductor 101, and is provided at a position diagonal to the short-circuit terminal 108 and the power supply terminal 107 in the radiation conductor 101.
- the ground conductor 103 faces the circuit board 102 and is arranged in parallel to the circuit board 102 at an interval.
- a plate-like inverted F antenna using the ground conductor 103 as the ground of the radiation conductor 101 is configured.
- a plate-like inverted F antenna is arranged in the first casing 104a so that the ground conductor 103 faces and is parallel to the back surface of the first casing 104a.
- a battery 105 is arranged in front of the antenna.
- the opening of the first housing 104a is closed by the second housing 104b, and the wireless device 100 is formed.
- the back surface of the first housing 104a, the ground conductor 103, the circuit board 102, the radiation conductor 101, and the surfaces of the second housing 104b are arranged so as to face each other and be parallel to each other.
- the wireless device 100 is installed in the meter box 200 so that the back surface of the first housing 104a faces and is parallel to the front wall portion of the meter box 200.
- the distance d (see FIG. 12B) between the back surface of the first housing 104a and the front wall of the meter box 200 is such that the ground conductor 103 and the meter box 200 are strongly coupled by capacitance as will be described later.
- the radio circuit 106 applies a high-frequency signal to the radiating conductor 101 via the power supply terminal 107, and the radiating conductor 101 converts the high-frequency signal into a radio wave and radiates it. To do.
- the ground conductor 103 is electrically coupled to the meter box 200.
- the meter box 200 acts as the ground of the radiation conductor 101 in the same manner as the ground conductor 103, so that the ground of the radiation conductor 101 becomes sufficiently large with respect to the wavelength of the radio wave.
- the radio wave radiation efficiency when the radio device 100 is arranged close to the metal meter box 200 may be larger than the radio wave radiation efficiency of the radio device 100 alone, as will be described later.
- FIG. 7A is a diagram showing a voltage standing wave ratio (VSWR) with respect to the frequency of the radio wave of the wireless device 100 alone.
- FIG. 7B shows the voltage standing wave ratio with respect to the frequency of the radio wave of the radio device 100 attached to the meter box 200.
- VSWR voltage standing wave ratio
- the resonance frequency of the wireless device 100 alone is 460 MHz.
- the resonance frequency of the radio device 100 attached to the meter box 200 is 430 MHz. For this reason, when the radio device 100 is attached to the meter box 200, the resonance frequency is shifted by 30 MHz.
- the bandwidth in which the voltage standing wave ratio is 3 or less when the wireless device 100 is attached to the meter box 200 is equal to the bandwidth of the wireless device 100 alone. That is, when the voltage standing wave ratio is high, the voltage of the reflected wave is large when the radio wave is transmitted, and the power efficiency is deteriorated. Therefore, the voltage standing wave ratio practical for an antenna is generally 3 or less. As shown in FIG. 7A, the bandwidth where the voltage standing wave ratio is 3 or less is approximately 20 MHz when the radio device 100 is a single unit. As shown in FIG. 7B, when the wireless device 100 is attached to the meter box 200, the bandwidth where the voltage standing wave ratio is 3 or less is 20 MHz.
- the resonance frequency of the wireless device 100 is set to be shifted by 30 MHz from the resonance frequency of the wireless device 100 alone. This provides the lowest voltage standing wave ratio and the best power efficiency.
- the frequency of the radio wave changes due to some cause, if the frequency of the radio wave is within a bandwidth of 20 MHz centering on the resonance frequency, the voltage standing wave ratio is within 3 or less. This is the same whether the wireless device 100 is a single device or the wireless device 100 is attached to the meter box 200. Therefore, even if the voltage standing wave ratio increases, the radio equipment 100 attached to the meter box 200 can obtain the radiation efficiency equivalent to that of the radio equipment 100 alone.
- FIG. 9 shows the directivity characteristics of the radio device 100 in the XY and XZ axes when the X, Y, and Z axes are determined as shown in FIG.
- A-1 indicates the directivity characteristics in the XY axis direction when the radio device 100 is a single unit
- A-2 indicates the directivity characteristics in the XZ axis direction when the radio device 100 is a single unit.
- B-1 indicates the directivity characteristic in the XY axis direction when the radio device 100 is mounted on the meter box 200
- A-2 indicates the XZ axis direction when the radio device 100 is mounted on the meter box 200.
- the directivity characteristics in are shown. In each graph, a thick line indicates vertical polarization, and a thin line indicates horizontal polarization.
- the vertical polarization shown in B-1 is recessed as compared with the vertical polarization shown in A-1, so that the directivity characteristic of the radio device 100 mounted on the meter box 200 is the directivity of the radio device 100 alone. Deteriorated compared to characteristics.
- the horizontal polarization shown in B-1 is larger than the horizontal polarization shown in A-1, the directivity characteristic of the radio device 100 mounted on the meter box 200 is the directivity characteristic of the radio device 100 alone. Compared to, it is greatly improved. Therefore, by attaching the wireless device 100 to the meter box 200 as a whole, the directivity characteristics in the XY axis directions are improved.
- the horizontal polarization shown in A-2 is equivalent to the horizontal polarization shown in B-2.
- the vertical polarization shown in A-2 is larger than the vertical polarization shown in B-2, and the directivity characteristics of the radio device 100 attached to the meter box 200 are compared with the directivity characteristics of the radio device 100 alone. Greatly improved.
- the radiation efficiency of the wireless device 100 alone calculated from the respective directivity characteristics is ⁇ 5 dB
- the radiation efficiency of the wireless device 100 attached to the meter box 200 is ⁇ 2 dB.
- the grounding conductor 103 in the wireless device 100 is electrically coupled to the front wall portion of the metal meter box 200 by attaching the wireless device 100 to the meter, and the effective volume of the antenna is increased. This is because. Thus, by attaching the radio device 100 to the meter box 200, antenna characteristics such as directivity and radiation efficiency are improved.
- the radiation conductor 101, the circuit board 102, and the ground conductor 103 are connected to the circuit under the condition that the size of the radio device 100 is limited to a small size that can be attached to the meter box 200.
- the size of the radio device 100 is limited to a small size that can be attached to the meter box 200.
- the circuit board 102 or the like is disposed between the radiation conductor 101 and the ground conductor 103.
- the radiation conductor 101 and the ground conductor 103 are arranged as far apart as possible, the frequency bandwidth of the antenna is widened, and the characteristics of the antenna can be improved.
- the size of the wireless device 100 can be kept small without increasing.
- the ground conductor 103 is as close as possible to the meter box 200, they are electrically coupled, and the ground conductor 103 and the meter box 200 function as a ground for the neglected conductor. Therefore, since this ground becomes larger than the wavelength of the radio wave emitted from the neglected conductor, the wireless device 100 is not easily affected by the surrounding metal. Therefore, even if the size of the ground conductor 103 is not increased, the antenna characteristics can be prevented from being deteriorated due to the radio device 100 being attached to the metal meter box 200 as a whole.
- the thickness of the radio device 100 can be reduced by providing the radiation conductor 101, the circuit board 102, and the ground conductor 103 in parallel with each other.
- the ground conductor 103 and the meter box 200 are provided in parallel to each other, they face each other, and the distance between them is set to be constant and small. Therefore, the ground conductor 103 and the meter box can be strongly and electromagnetically coupled in a wide range, and deterioration of antenna characteristics can be further prevented.
- the radiation conductor 101 is electrically connected to the circuit board 102 by the short-circuit terminal 108 and the power supply terminal 107, and the ground conductor 103 is connected to the circuit board 102 by the ground terminal 110. For this reason, since the radiation conductor 101 is not directly connected to the ground conductor 103, the radiation conductor 101 does not approach the metal meter box 200 even if the ground conductor 103 is brought closer to the metal meter box 200. Thereby, an increase in the impedance of the antenna can be suppressed, and deterioration of the antenna characteristics can be prevented.
- connection position between the ground terminal 110 and the ground portion of the circuit board 102 is arranged in the vicinity of the position where the short-circuit terminal 108 is grounded to the ground portion. For this reason, the distance through which the current flows is shortened, an increase in the impedance of the antenna is suppressed, and deterioration of the antenna characteristics is prevented.
- the ground conductor 103 is used as the ground of the radiation conductor 101.
- the ground layer 123 of the circuit board 120 functions as the ground (ground conductor) of the radiation conductor 101.
- FIG. 10A is a front view of the radiation conductor 101 and the circuit board 120.
- FIG. 10B is a side view of the radiation conductor 101 and the circuit board 120.
- the radiation conductor 101 and the radio circuit 106 are mounted on the circuit board 120.
- the circuit board 120 is composed of multiple layers, and a layer provided with conductor wiring is stacked on an insulating substrate, and includes a first circuit layer 121, a second circuit layer 122, and a ground layer 123.
- the first circuit layer 121 and the second circuit layer 122 constitute a circuit for performing wireless transmission and reception, and are formed on the main surface closer to the radiation conductor 101 of the pair of main surfaces of the circuit board 120.
- the ground layer 123 is composed of a conductor layer made of a conductor such as a metal, and is formed as a ground conductor on a main surface far from the radiation conductor 101 out of a pair of main surfaces of the circuit board 120. Configure.
- the circuit board 120 is disposed in the first housing 104a so that the ground layer 123 faces the back surface of the first housing 104a, and the opening of the first housing 104a is closed by the second housing 104b. Can be removed.
- the ground of the circuit board 120 is obtained.
- the layer 123 faces the front wall portion in parallel. Since the space between the ground layer 123 and the front wall portion is small, the ground layer 123 is electrically coupled to the surface of the front wall portion (by capacitance). Thereby, the ground layer 123 and the surface of the front wall part function as the ground of the radiation conductor 101, and the effective volume of the antenna is increased. Therefore, the wireless device 100 is not easily affected by the surrounding metal, and deterioration of radiation characteristics due to the surrounding metal is prevented. In addition, it is not necessary to provide a large ground in the wireless device 100 in the wireless device 100 used in a low frequency band, and it is possible to reduce the size of the wireless device 100 mounted with an antenna having high radiation characteristics.
- the third embodiment by assigning one layer of the circuit board 120 having a multilayer structure to the ground of the radiation conductor 101, it is not necessary to separately provide the ground of the radiation conductor 101. Therefore, the size of the radio device 100 is reduced, the number of parts can be reduced, and the product cost can be reduced.
- the fourth embodiment differs from the second embodiment in the shapes of the first housing and the second housing, but the other parts are the same as those in the second embodiment.
- FIG. 11 is an exploded perspective view of the wireless device 100. For convenience, the battery and the radio circuit are omitted.
- the first housing 130a and the second housing 130b of the housing 130 are container-shaped with openings, and are formed of, for example, a resin material such as polypropylene or ABS, which is a material having low loss characteristics with respect to radio waves. Is done.
- the size of the first housing 130a is equal to the size of the second housing 130b.
- the first housing 130a and the second housing 130b are overlapped with each other, and are joined and fixed to each other by screws, adhesion, welding, or the like.
- the circuit board 102, the radiation conductor 101, the power supply terminal 107, the short-circuit terminal 108, the ground conductor 103, and the ground terminal 110 are the same as in the second embodiment.
- the positions of the power supply terminal 107 and the short-circuit terminal 108 are different from those of the second embodiment.
- the short-circuit terminal 108 and the power supply terminal 107 are parallel to each other, provided at the ends of the radiation conductor 101 and the circuit board 102, and the distance between them is radiated.
- the value is set such that impedance matching between the conductor 101 and the radio circuit 106 can be obtained. For this reason, if these conditions are satisfied, the positions of the power supply terminal 107 and the short-circuit terminal 108 are not limited to the positions of the fourth embodiment in the second embodiment.
- the position of the ground terminal 110 is also different between the second embodiment and the fourth embodiment.
- the ground terminal 110 is provided at each end of the circuit board 102 and the ground conductor 103, and is connected to the vicinity of the ground position of the short-circuit terminal 108 on the circuit board 102. Therefore, as long as this condition is satisfied, the ground terminal 110 is not limited to the position of the second and fourth embodiments.
- FIG. 12 (A) is a front view showing a state in which the wireless device 100 is installed in the meter box 200
- FIG. 12 (B) is a side view of FIG. 12 (A).
- the first housing 130a is not shown for convenience.
- the wireless device 100 including the plate-like inverted F antenna is installed on the front wall portion of the meter box 200.
- the operating frequency of this plate-like inverted F antenna is set to, for example, 433 MHz.
- the meter box 200 is, for example, a metal measuring device that measures a gas flow rate, and has a rectangular parallelepiped shape.
- the size of the meter box 200 is set to, for example, a length of 200 mm (0.289 wavelength), a width of 200 mm (0.289 wavelength), and a thickness of 100 mm (0.144 wavelength).
- the length Lr1 of the radiation conductor 101 is set to 45 mm (0.065 wavelength), and the width Lr2 is set to 66 mm (0.095 wavelength).
- the length Ls1 of the ground conductor 103 is set to 62 mm (0.089 wavelength), and the width Ls2 is set to 66 mm (0.095 wavelength).
- the distance h between the circuit board 102 and the radiation conductor 101 is set to 18.5 mm (0.027 wavelength), and the planar distance s between the short-circuit terminal 108 and the short ground terminal 110 is set to 5 mm (0.007 wavelength).
- the radio device 100 is installed below the display unit 201 arranged on the front wall of the meter box 200. At this time, since the radio device 100 is installed such that the back surface of the first housing 130 a faces the front wall portion of the meter box 200, the ground conductor 103 is close to the meter box 200. A distance d is provided between the back surface of the first housing 130 a and the front wall portion of the meter box 200. This interval d is set to 1/50 wavelength or less, for example. Since the distance d is small, the ground conductor 103 is electrically capacitively coupled to the meter box 200, and the ground conductor 103 is regarded as the same potential as the meter box 200 in terms of high frequency. Therefore, in addition to the ground conductor 103, the meter box 200 functions as the ground of the plate-like inverted F antenna, and a large ground area is ensured even in the small wireless device 100, and high radiation efficiency can be realized.
- FIG. 13 shows the gain of the radio device 100 alone and the gain of the radio device 100 attached to the meter box 200 with respect to the distance d.
- the vertical axis represents the gain of the plate-like inverted F antenna.
- the values other than the interval d are the values shown in FIGS. 12 (A) and 12 (B).
- the gain when the radio device 100 is a single unit is about ⁇ 8 dB, whereas the gain of the radio device 100 attached to the meter box 200 is about ⁇ 3 dB or more. Therefore, it can be seen that the gain is improved by 5 dB or more by attaching the radio device 100 to the meter box 200. This is presumably because the meter box 200 and the ground conductor 103 are electrically capacitively coupled, and the ground area of the plate-like inverted F antenna is increased.
- the gain decreases as the distance d between the radio device 100 and the meter box 200 increases to 4 mm, 5 mm, and 10 mm. Every time this distance d increases by 1 mm (0.001 wavelength), the gain deteriorates by 0.2 dB. Therefore, by bringing the ground conductor 103 as close as possible to the meter box 200, these coupling capacities are increased and the gain can be improved.
- FIG. 14 shows the relationship between the planar distance s between the short-circuit terminal 108 and the ground terminal 110 and the gain of the plate-shaped inverted F antenna when the radio device 100 is attached to the meter box 200.
- the vertical axis represents the gain of the plate-like inverted F antenna.
- the values other than the plane distance s are the values shown in FIGS. 12 (A) and 12 (B).
- the gain is about ⁇ 2.5 dB.
- the gain is about -4 dB. Therefore, when the distance s is small, the gain increases. This is because, as the distance s between the connection position of the short-circuit terminal 108 and the connection position of the ground terminal 110 in the board circuit is larger, the current flow in the circuit board 102 changes, the current distributed in the ground conductor 103 changes, and the radiation resistance changes. This is thought to be due to a drop in
- the antenna characteristics at this time Exceeds that of the radio 100 alone.
- the antenna characteristics improve as the distance between the radio device 100 and the meter box 200 is reduced.
- the antenna characteristics are excellent by installing the ground terminal 110 in the vicinity of the ground position of the short-circuit terminal 108 on the circuit board 102.
- the shorter the planar distance s between the short-circuit terminal 108 and the ground terminal 110 in the circuit board 102 the better the antenna characteristics.
- the radiating conductor 101, the circuit board 102, the ground conductor 103, and the front wall portion of the meter box 200 are arranged in this order and in parallel, thereby reducing the size.
- excellent antenna characteristics can be obtained.
- the radiation conductor 101 is electrically connected to the circuit board 102 by the short-circuit terminal 108 and the power supply terminal 107, and the ground conductor 103 is connected to the circuit board 102 by the ground terminal 110, deterioration of the antenna characteristics is prevented. obtain.
- first casing 130a and the second casing 130b are fixed by screws, adhesion, and welding.
- first casing 130a and the second casing 130b are welded by the conductor element 132.
- the point of fixing is different.
- Other parts are the same as those in the second and fourth embodiments.
- FIG. 15 is an exploded perspective view of the wireless device 100. For convenience, the battery is omitted.
- the first housing 130a has a groove 131 on the joint surface with the second housing 130b, and the groove 131 is provided so as to surround the opening of the first housing 130a.
- a conductor element 132 is fitted in the groove 131.
- the conductor element 132 is a linear object formed of a metal conductor such as iron or copper. Both ends of the conductor element 132 are connected to each other, and the conductor element 132 is formed in an annular shape.
- the resistance of the conductor element 132 causes the conductor element 132 to be energized.
- 132 generates heat.
- the joining surfaces of the first casing 130a and the second casing 130b are melted by the heat generated from the conductor element 132, and the first casing 130a and the second casing 130b are welded. 130 is formed.
- the housing 130 is sealed.
- the radiation conductor 101 when a high frequency signal is given to the radiation conductor 101, the radiation conductor 101 is electrically coupled to a conductor element 132 existing in the vicinity.
- the conductor element 132 is used as a radiating element, and the effective volume of the antenna is increased, so that the antenna performance is further improved.
- the casing 130 of the wireless device 100 is sealed, and the contents of the wireless device 100 are blocked from air and water. Therefore, the radiation conductor 101, the ground conductor 103, and the like are not oxidized, and a change in impedance of the radiation conductor 101 is prevented, so that stable antenna characteristics can be maintained.
- the conductor element 132 used for welding the first and second housings 130b is disposed in the vicinity of the radiation conductor 101, so that they are electrically coupled, and the radiation conductor The radiation performance of 101 is improved.
- the radio device 100 is arranged in the vicinity of the meter box 200 as in the above embodiment, the characteristics of the antenna are improved. Furthermore, by arranging the radiation conductor 101, the circuit board 102, the ground conductor 103, and the front wall portion of the meter box 200 in this order and in parallel, excellent antenna characteristics can be obtained in the small wireless device 100. Further, by installing the ground terminal 110 in the vicinity of the ground position of the short-circuit terminal 108 on the circuit board 102, the antenna characteristics are excellent.
- the radiation conductor 101 is electrically connected to the circuit board 102 by the short-circuit terminal 108 and the power supply terminal 107 and the ground conductor 103 is connected to the circuit board 102 by the ground terminal 110, the deterioration of the antenna characteristics is prevented. obtain.
- the recessed first housing 130a and the flat second housing 130b are used, and in the fourth embodiment, the recessed first housing 130a and the second housing 130b are used. It was.
- the first housing 130a and the second housing 130b are not limited to these shapes as long as they accommodate components such as the radiation conductor 101.
- the first housing 130a may be flat and the second housing 130b may be concave.
- the first housing 130a and the second housing 130b are welded by the linear conductor elements 132.
- the first housing 130a and the first casing 130a are also formed by the linear conductor elements 132.
- the two housings 130b can also be fixed.
- the conductor element 132 has a ring shape in which both ends thereof are connected, but the present invention is not limited to this.
- both ends of the conductor element 132 may not be connected, and the gap between the both ends may be opened, and one gap may be provided in the conductor element 132.
- two conductor elements 132 may be arranged with a gap therebetween, and two gaps may be provided in the conductor element 132.
- the ground conductor 103 is used as the ground of the radiation conductor 101.
- the ground layer 123 of the circuit board 102 is used as the ground of the radiation conductor 101. You can also.
- the plate-like inverted F antenna is used as the radiating conductor 101, but the radiating conductor 101 may be composed of other planar conductor elements 132.
- a linear inverted L antenna, a plate-shaped dipole antenna, or the like is used as a planar conductor element.
- flat conductors are used for the radiation conductor 101 and the ground conductor 103.
- a linear conductor element or a metal foil wiring on a circuit board may be used for the radiation conductor. .
- examples of the linear conductor element include a linear antenna such as a dipole antenna, a loop antenna, or a meander line antenna.
- the radiation conductor 140 of the linear conductor element is electrically connected to the circuit board 102.
- the radiation conductor 140 extends perpendicularly from the circuit board 102, then bends at a right angle, and extends parallel to the circuit board 102. Therefore, the radiation conductor 140, the circuit board 102, and the ground conductor 103 are arranged in parallel in this order in the thickness direction of the circuit board 102.
- a circuit board 102 having a multilayer structure is used as shown in FIG.
- the circuit board 102 has a circuit layer and a radiation conductor layer, and the metal foil wiring 141 appearing on the surface of the circuit board 102 functions as a radiation conductor layer.
- the metal foil wiring 141, the circuit layer of the circuit board 102, and the ground conductor 103 are arranged in this order in parallel. In this case, the number of parts is reduced, the size of the radio is reduced, and the product cost is reduced.
- the metal foil wiring on the circuit board is used for the radiation conductor
- two circuit boards 102 and 142 are used as shown in FIG.
- the circuit board 142 is provided perpendicular to the circuit board 102, and a metal foil wiring 143 is arranged on the surface thereof.
- the metal foil wiring 143 functions as a radiation conductor.
- the metal foil wiring 143 extends perpendicularly to the circuit board 102, then bends vertically, and extends parallel to the circuit board 102. Therefore, the metal foil wiring 143, the circuit board 102, and the ground conductor 103 are arranged in parallel in this order.
- the circuit board 102 may be composed of a multilayer board, a double-sided board, or a single-sided board in consideration of the circuit scale, reliability, and the like.
- the radio device 100 has an effect that high radiation efficiency can be obtained in a state where the radio device 100 is installed in a meter constituted by the metal casing 130, despite the small structure. It is useful as a radio device 100 for an automatic meter reading system such as a meter box 200.
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Abstract
Description
図17は、本発明の第1実施形態に係る無線機100の構成を示すブロック図である。
図1は、本発明の第2実施形態に係る無線機100が装着されたメーターボックス200を示す斜視図である。
第2実施形態では、接地導体103が放射導体101のグラウンドとして用いられた。これに対し、第3実施形態では、回路基板120のグラウンド層123が、放射導体101のグラウンド(接地導体)として機能する。
第4実施形態は、第1筐体および第2筐体の形状が第2実施形態と異なるが、これ以外の部分に関しては第2実施形態と同様である。
第4実施形態では第1筐体130aおよび第2筐体130bをビス、接着および溶着などにより固定したが、第5実施形態では第1筐体130aおよび第2筐体130bを導体素子132による溶着で固定する点が異なる。これ以外の部分に関しては第2および第4実施形態と同様である。
101 放射導体
102 回路基板
103 接地導体
104 筐体
104a 第1筐体
104b 第2筐体
106 無線回路(電気回路)
107 給電端子
108 短絡端子
110 接地端子
120 回路基板
123 グラウンド層
124 放射導体
130 筐体
130a 第1筐体
130b 第2筐体
132 導体素子
140 放射導体
141 金属箔の配線(放射導体)
143 金属箔の配線(放射導体)
Claims (11)
- 高周波信号を電波に変換して放射する放射導体と、
前記放射導体と電気的に接続され、かつ前記放射導体に前記高周波信号を供給する電気回路が搭載された回路基板と、
前記回路基板の前記電気回路と電気的に接続され、前記放射導体に対向し、かつ前記放射導体のグラウンドを構成する平面状の接地導体と、
前記放射導体、前記回路基板および前記接地導体を収納する樹脂製の筐体と、
を備え、
前記接地導体、前記回路基板および前記放射導体は、前記回路基板の厚み方向に、この順で配置される、無線機。 - 前記接地導体と、前記筐体の前記接地導体に対向する面とが互いに平行に配置される、
請求項1記載の無線機。 - 前記放射導体と、前記接地導体と、前記回路基板とが互いに平行に配置される、
請求項1または2に記載の無線機。 - 前記放射導体は平面状の導体素子で構成される、
請求項1ないし3のいずれか一項に記載の無線機。 - 前記放射導体は板状逆Fアンテナで構成される、
請求項4に無線機。 - 前記回路基板の電気回路と前記放射導体とを電気的に接続し、前記回路基板から前記放射導体に前記高周波信号を供給する給電端子と、
前記回路基板の電気回路のグラウンド部と前記放射導体とを電気的に接続し、前記放射導体を前記電気回路のグラウンド部に接地する短絡端子と、
前記接地導体と前記回路基板の電気回路のグラウンド部とを電気的に接続し、前記グラウンド部において前記短絡端子が接地された位置の近傍に配置される接地端子とをさらに備える、
請求項1ないし5のいずれか一項に記載の無線機。 - 前記放射導体は前記回路基板の一対の主面のうち前記接地導体から遠い方の主面の上に形成された配線で構成される、
請求項1ないし3のいずれか一項に記載の無線機。 - 前記放射導体は線状の導体素子で構成される、
請求項1ないし3のいずれか一項に記載の無線機。 - 前記回路基板の一対の主面のうち前記放射導体から遠い方の主面の上に前記接地導体としての導体層が形成されている、請求項1記載の無線機。
- 前記回路基板の一対の主面のうち前記放射導体に近い方の主面の上に前記電気回路を含む層が形成されている、請求項9記載の無線機。
- 前記筐体は、開口を有する容器状の本体と、前記本体の開口を塞ぐ蓋とを有し、
前記本体および前記蓋のいずれか一方に、前記開口を囲む線状の導体素子が配置され、
前記本体に、前記開口の近傍に前記放射導体が位置するようにして、前記放射導体、前記回路基板および前記接地導体が収容されている、請求項1ないし10のいずれか一項に記載の無線機。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US13/580,637 US9601831B2 (en) | 2010-11-25 | 2011-11-24 | Radio device |
EP11842538.8A EP2645480B1 (en) | 2010-11-25 | 2011-11-24 | Wireless device |
JP2012518330A JPWO2012070242A1 (ja) | 2010-11-25 | 2011-11-24 | 無線機 |
CN201180007927.2A CN102742078B (zh) | 2010-11-25 | 2011-11-24 | 无线机 |
ES11842538.8T ES2644294T3 (es) | 2010-11-25 | 2011-11-24 | Dispositivo inalámbrico |
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JP2010-261960 | 2010-11-25 | ||
JP2010261960 | 2010-11-25 | ||
JP2011-022372 | 2011-02-04 | ||
JP2011022372 | 2011-02-04 |
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PCT/JP2011/006534 WO2012070242A1 (ja) | 2010-11-25 | 2011-11-24 | 無線機 |
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US (1) | US9601831B2 (ja) |
EP (1) | EP2645480B1 (ja) |
JP (1) | JPWO2012070242A1 (ja) |
CN (1) | CN102742078B (ja) |
ES (1) | ES2644294T3 (ja) |
WO (1) | WO2012070242A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013187013A1 (ja) * | 2012-06-15 | 2013-12-19 | パナソニック株式会社 | 無線装置 |
WO2014064927A1 (ja) * | 2012-10-24 | 2014-05-01 | 株式会社デンソー | アンテナ |
WO2015033498A1 (ja) * | 2013-09-03 | 2015-03-12 | ソニー株式会社 | 携帯端末 |
JP2018117258A (ja) * | 2017-01-19 | 2018-07-26 | パナソニックIpマネジメント株式会社 | 板状アンテナおよびこれを用いた無線機 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014182909A1 (en) * | 2013-05-09 | 2014-11-13 | Knowles Capital Formation Inc. | Planar inverted-f wing antenna for wireless culinary appliances |
DE102013012041B4 (de) * | 2013-07-18 | 2015-03-26 | Diehl Metering Systems Gmbh | Datensender eines Messdaten-Erfassungsgerätes |
US9163974B1 (en) * | 2014-12-11 | 2015-10-20 | Enevo Oy | Wireless gauge apparatus and manufacturing method thereof |
JP2017139579A (ja) * | 2016-02-02 | 2017-08-10 | 株式会社オートネットワーク技術研究所 | 車両用アンテナ基板及び車載機 |
JP6731578B2 (ja) * | 2016-09-01 | 2020-07-29 | パナソニックIpマネジメント株式会社 | 無線通信装置 |
US10826181B2 (en) * | 2017-07-11 | 2020-11-03 | Sensus Spectrum, Llc | Hybrid patch antennas, antenna element boards and related devices |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0518138U (ja) * | 1991-08-07 | 1993-03-05 | 日本ビクター株式会社 | コードレス電話機 |
JPH0927092A (ja) | 1995-07-13 | 1997-01-28 | Matsushita Electric Ind Co Ltd | 自動検針用無線装置 |
JPH10313212A (ja) | 1997-05-12 | 1998-11-24 | Matsushita Electric Ind Co Ltd | 基板実装形板状アンテナ |
JP2003092510A (ja) | 2001-09-18 | 2003-03-28 | Sharp Corp | 板状逆fアンテナ及び無線通信装置 |
JP2004320814A (ja) * | 1995-08-03 | 2004-11-11 | Nokia Corp | アンテナ |
WO2010073454A1 (ja) * | 2008-12-24 | 2010-07-01 | パナソニック株式会社 | 携帯無線機 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3502785A (en) * | 1967-11-20 | 1970-03-24 | Anne D Nickola | Mounting pedestal for utilities |
US5298894A (en) * | 1992-06-17 | 1994-03-29 | Badger Meter, Inc. | Utility meter transponder/antenna assembly for underground installations |
TW320813B (ja) | 1996-04-05 | 1997-11-21 | Omron Tateisi Electronics Co | |
JP3430809B2 (ja) | 1996-07-19 | 2003-07-28 | オムロン株式会社 | 送受信装置 |
JP3467164B2 (ja) | 1997-01-10 | 2003-11-17 | シャープ株式会社 | 逆fアンテナ |
JP3560783B2 (ja) * | 1997-09-03 | 2004-09-02 | 東京瓦斯株式会社 | 自動検針用無線装置 |
JP3502071B2 (ja) | 2001-08-08 | 2004-03-02 | 松下電器産業株式会社 | 無線機用アンテナ装置 |
JP2005012743A (ja) | 2002-10-22 | 2005-01-13 | Matsushita Electric Ind Co Ltd | アンテナとそれを用いた電子機器 |
JP4749003B2 (ja) | 2005-03-02 | 2011-08-17 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | アンテナ装置、及び無線装置 |
US7629928B2 (en) | 2005-03-23 | 2009-12-08 | Kyocera Wireless Corp. | Patch antenna with electromagnetic shield counterpoise |
JP2006319496A (ja) | 2005-05-11 | 2006-11-24 | Hitachi Ltd | Rfidタグ |
CN2864845Y (zh) | 2005-09-07 | 2007-01-31 | 常州信力燃气设备有限公司 | 无线远程数据采集装置 |
US7554460B2 (en) * | 2006-09-25 | 2009-06-30 | Jeff Verkleeren | Utility meter antenna for ground mounted meter boxes |
JP2008288931A (ja) | 2007-05-18 | 2008-11-27 | Panasonic Electric Works Co Ltd | アンテナ装置 |
US7612725B2 (en) * | 2007-06-21 | 2009-11-03 | Apple Inc. | Antennas for handheld electronic devices with conductive bezels |
CN201134510Y (zh) | 2007-10-31 | 2008-10-15 | 京信通信系统(中国)有限公司 | 小型化智能天线系统 |
JP5304790B2 (ja) * | 2008-09-01 | 2013-10-02 | パナソニック株式会社 | 無線装置とそれを備えた計測装置 |
-
2011
- 2011-11-24 ES ES11842538.8T patent/ES2644294T3/es active Active
- 2011-11-24 WO PCT/JP2011/006534 patent/WO2012070242A1/ja active Application Filing
- 2011-11-24 US US13/580,637 patent/US9601831B2/en not_active Expired - Fee Related
- 2011-11-24 JP JP2012518330A patent/JPWO2012070242A1/ja active Pending
- 2011-11-24 CN CN201180007927.2A patent/CN102742078B/zh not_active Expired - Fee Related
- 2011-11-24 EP EP11842538.8A patent/EP2645480B1/en not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0518138U (ja) * | 1991-08-07 | 1993-03-05 | 日本ビクター株式会社 | コードレス電話機 |
JPH0927092A (ja) | 1995-07-13 | 1997-01-28 | Matsushita Electric Ind Co Ltd | 自動検針用無線装置 |
JP2004320814A (ja) * | 1995-08-03 | 2004-11-11 | Nokia Corp | アンテナ |
JPH10313212A (ja) | 1997-05-12 | 1998-11-24 | Matsushita Electric Ind Co Ltd | 基板実装形板状アンテナ |
JP2003092510A (ja) | 2001-09-18 | 2003-03-28 | Sharp Corp | 板状逆fアンテナ及び無線通信装置 |
WO2010073454A1 (ja) * | 2008-12-24 | 2010-07-01 | パナソニック株式会社 | 携帯無線機 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2645480A4 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013187013A1 (ja) * | 2012-06-15 | 2013-12-19 | パナソニック株式会社 | 無線装置 |
CN104364963A (zh) * | 2012-06-15 | 2015-02-18 | 松下知识产权经营株式会社 | 无线装置 |
EP2863474A4 (en) * | 2012-06-15 | 2015-05-27 | Panasonic Ip Man Co Ltd | WIRELESS DEVICE |
JPWO2013187013A1 (ja) * | 2012-06-15 | 2016-02-04 | パナソニックIpマネジメント株式会社 | 無線装置 |
WO2014064927A1 (ja) * | 2012-10-24 | 2014-05-01 | 株式会社デンソー | アンテナ |
US9692133B2 (en) | 2012-10-24 | 2017-06-27 | Denso Corporation | Antenna |
WO2015033498A1 (ja) * | 2013-09-03 | 2015-03-12 | ソニー株式会社 | 携帯端末 |
US9954270B2 (en) | 2013-09-03 | 2018-04-24 | Sony Corporation | Mobile terminal to prevent degradation of antenna characteristics |
JP2018117258A (ja) * | 2017-01-19 | 2018-07-26 | パナソニックIpマネジメント株式会社 | 板状アンテナおよびこれを用いた無線機 |
Also Published As
Publication number | Publication date |
---|---|
US20120313824A1 (en) | 2012-12-13 |
CN102742078A (zh) | 2012-10-17 |
EP2645480A1 (en) | 2013-10-02 |
ES2644294T3 (es) | 2017-11-28 |
EP2645480A4 (en) | 2013-10-09 |
CN102742078B (zh) | 2016-01-20 |
EP2645480B1 (en) | 2017-07-19 |
US9601831B2 (en) | 2017-03-21 |
JPWO2012070242A1 (ja) | 2014-05-19 |
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