WO2017029777A1 - Antenna apparatus, and method for transmitting and receiving signal - Google Patents

Antenna apparatus, and method for transmitting and receiving signal Download PDF

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Publication number
WO2017029777A1
WO2017029777A1 PCT/JP2016/003448 JP2016003448W WO2017029777A1 WO 2017029777 A1 WO2017029777 A1 WO 2017029777A1 JP 2016003448 W JP2016003448 W JP 2016003448W WO 2017029777 A1 WO2017029777 A1 WO 2017029777A1
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WIPO (PCT)
Prior art keywords
antenna
circuit
signal
antennas
radio circuit
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PCT/JP2016/003448
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French (fr)
Japanese (ja)
Inventor
真介 植田
笠井　秀樹
興梠　武志
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パナソニックＩｐマネジメント株式会社
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Publication of WO2017029777A1 publication Critical patent/WO2017029777A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Definitions

  • the present invention relates to an antenna device having a plurality of antennas and a signal transmission / reception method.
  • Patent Document 1 A technique described in Patent Document 1 is known as an antenna device that transmits or receives signals using a plurality of antennas. When transmitting or receiving a signal, this antenna device matches one of the two antennas with the radio circuit unit. Thereby, the antenna used for transmission or reception is switched.
  • the present invention has been made paying attention to such problems, and an object thereof is to provide an antenna device and a signal transmission / reception method capable of suppressing a decrease in transmission / reception level during signal transmission / reception. .
  • An antenna device includes a plurality of antennas each including a matching circuit that adjusts impedance, a control circuit that adjusts impedance of each antenna by controlling the matching circuit of each antenna, and each antenna transmits and receives A radio circuit that processes a signal to be transmitted, wherein the control circuit selects any one of the plurality of antennas and controls the matching circuit of the selected antenna to control the selected antenna and the radio circuit.
  • the wireless circuit is configured to match, control the matching circuit of the unselected antenna to make the unselected antenna and the wireless circuit mismatch, and output a signal to the selected antenna during signal transmission
  • the radio circuit is controlled to receive a signal from the selected antenna when receiving a signal.
  • a signal transmission / reception method is a signal transmission / reception method that transmits / receives a signal using a plurality of antennas, wherein one of the plurality of antennas is selected, and the selected antenna matches a radio circuit. Adjusting the impedance of the selected antenna, and adjusting the impedance of the unselected antenna so that the unselected antenna and the radio circuit do not match. Adjusting the impedance of the non-selected antenna is to disconnect the non-selected antenna and the radio circuit, or not to operate the radio circuit connected to the non-selected antenna. including.
  • the antenna device and the signal transmission / reception method suppress a decrease in transmission / reception level during signal transmission / reception.
  • (A) is a schematic diagram of a system in which the antenna device according to the first embodiment is used
  • (b) is a schematic diagram of a system in which the antenna device according to the second embodiment is used.
  • the circuit diagram of the 1st antenna of the antenna apparatus of FIG. The time chart of the antenna apparatus at the time of signal transmission.
  • FIG. 1 (a) shows a system 1 in which the antenna device shown in the first embodiment is used.
  • the system 1 includes an electrical device 2 (for example, lighting), a switch 3 that operates the electrical device 2, and a controller 4 that controls the electrical device 2.
  • the illumination switch 3 operates the illumination based on a signal transmitted from the controller 4.
  • the controller 4 transmits a signal to the switch 3 and receives a signal from the switch 3.
  • the frequency of the signal is defined as a specific frequency (for example, 426 MHz) within a range of 100 MHz to 10 GHz.
  • a diversity effect is used for the purpose of improving the reliability of transmission and reception between the switch 3 and the controller 4.
  • the antenna device 10 in the controller 4 includes a plurality of antennas.
  • FIG. 1B shows an example of a system 5 in which the antenna device shown in the second embodiment is used.
  • the system 5 includes a plurality of electrical devices 6, 7, a first control device 6 a (for example, a switch) that operates the first electrical device 6, a second control device 7 a that controls the second electrical device 7,
  • the management apparatus 8 which manages the 1st control apparatus 6a and the 2nd control apparatus 7a is provided.
  • the first electric device 6 is, for example, illumination
  • the second electric device 7 is, for example, a solar battery.
  • the management device 8 communicates with each of the first control device 6a and the second control device 7a using signals having different frequencies. For example, the management device 8 communicates with the first control device 6a using a signal having a first frequency (for example, 426 MHz).
  • the management device 8 communicates with the second control device 7a using a signal having a second frequency (for example, 920 MHz).
  • the antenna device 30 (see FIG. 6) of the management device 8 includes an antenna that transmits and receives a first frequency signal and an antenna that transmits and receives a second frequency signal.
  • the controller 4 and the management device 8 are provided with a plurality of antennas.
  • the controller 4 and the management device 8 preferably have a small arrangement space and have a limited size. For this reason, the distance between the plurality of antennas arranged in the controller 4 and the management device 8 is reduced.
  • “close” indicates that the distance between the antennas at which no coupling occurs between the plurality of antennas is shorter than the minimum distance at the time of signal transmission or reception. For this reason, when the distance between the antennas is short, in these devices (the controller 4 and the management device 8), coupling may occur between the antennas at the time of signal transmission or reception.
  • the antenna devices 10 and 30 shown below suppress coupling between antennas.
  • the antenna device 10 transmits and receives a signal of a specific frequency (for example, 426 MHz) using the plurality of antennas 11 and 12.
  • the antenna device 10 includes a first antenna 11, a second antenna 12, a radio circuit 13, a switching circuit 14, a control circuit 15, and a storage device 16.
  • the first antenna 11 includes an antenna unit 11a and a matching circuit 11b.
  • the antenna unit 11a is configured in a loop or bar shape, for example.
  • the antenna unit 11a is connected to the ground.
  • the second antenna 12 includes an antenna unit 12a and a matching circuit 12b.
  • the first antenna 11 and the second antenna 12 have the same structure.
  • the matching circuit 11b is a circuit for changing the impedance of the first antenna 11. As shown in FIG. 3, in the case of a loop antenna, the matching circuit 11b can be provided in the loop antenna.
  • the matching circuit 11 b includes a variable capacitance element 21 and a capacitance element 22.
  • the variable capacitance element 21 is an element whose capacitance can be adjusted by an input signal (for example, applied voltage). As the variable capacitance element 21, for example, a variable capacitance diode is used.
  • the radio circuit 13 forms a transmission signal or processes a reception signal received by the first antenna 11 or the second antenna 12.
  • the switching circuit 14 is disposed between the first antenna 11 and the radio circuit 13 and between the second antenna 12 and the radio circuit 13.
  • the switching circuit 14 switches to one of the first connection state A1 and the second connection state A2 based on a command from the control circuit 15.
  • the first connection state A1 indicates a state in which the switching circuit 14 connects the first antenna 11 and the wireless circuit 13 and does not connect the second antenna 12 to the wireless circuit 13.
  • the second connection state A2 indicates a state in which the switching circuit 14 connects the second antenna 12 and the radio circuit 13 and does not connect the first antenna 11 to the radio circuit 13. In any state of the first connection state A1 and the second connection state A2, the first antenna 11 and the second antenna 12 are not connected.
  • the switching circuit 14 is configured by, for example, a semiconductor switching element.
  • the control circuit 15 controls the first antenna 11, the second antenna 12, and the switching circuit 14 at the time of signal transmission and signal reception (including standby time for waiting for a signal). Specifically, the control circuit 15 matches or mismatches the first antenna 11 and the second antenna 12 with respect to the radio circuit 13.
  • the control circuit 15 applies parameters (for example, applied voltage) applied to the matching circuits 11 b and 12 b so that the transmission level or reception level of the antennas 11 and 12 with respect to the radio circuit 13 is increased. Adjust. Parameters (applied voltages) with which the antennas 11 and 12 are matched with the radio circuit 13 are set in advance. For example, when the antenna device 10 is manufactured, the applied voltage input to the matching circuits 11b and 12b is changed to apply the matching voltage to the wireless circuit 13 (the applied voltage at which the transmission level and the reception level are higher than the first reference value). ) Is detected. The detected applied voltage is recorded in the storage device 16 of the antenna device 10.
  • a parameter (applied voltage) that allows the antenna to be matched to the radio circuit 13 is referred to as a “matching signal”.
  • the control circuit 15 applies parameters (for example, to the matching circuits 11b and 12b so that the transmission level or the reception level of the antennas 11 and 12 with respect to the transmission signal or the reception signal becomes low). , Applied voltage). Parameters (applied voltages) that do not match the antennas 11 and 12 with the wireless circuit 13 are set in advance. For example, when the antenna device 10 is manufactured, the applied voltage input to the matching circuits 11b and 12b is changed, and the applied voltage that does not match the wireless circuit 13 (the transmission level and the second reference value lower than the first reference value). The applied voltage at which the reception level decreases) is detected. The detected applied voltage is recorded in the storage device 16 of the antenna device 10.
  • a parameter (applied voltage) at which the antenna does not match the wireless circuit 13 is referred to as a “mismatch signal”.
  • the control circuit 15 transmits a transmission signal using the first antenna 11 and the second antenna 12 during signal transmission. Specifically, the control circuit 15 operates the switching circuit 14 during signal transmission to change the connection state between the first antenna 11, the second antenna 12, and the radio circuit 13 to the first connection state A 1 and the second connection state. Switch periodically with A2.
  • the control circuit 15 controls the antennas 11 and 12 as follows.
  • the control circuit 15 inputs the matching signal V11 to the matching circuit 11b of the first antenna 11, matches the first antenna 11 to the radio circuit 13, and inputs the mismatch signal V22 to the matching circuit 12b of the second antenna 12.
  • the antenna 12 is mismatched with the radio circuit 13. Further, the radio circuit 13 outputs a transmission signal to the first antenna 11 during a period in which the matching signal V ⁇ b> 11 is input to the first antenna 11.
  • the control circuit 15 controls the antennas 11 and 12 as follows.
  • the control circuit 15 inputs the mismatch signal V12 to the matching circuit 11b of the first antenna 11, makes the first antenna 11 mismatch to the radio circuit 13, and inputs the matching signal V21 to the matching circuit 12b of the second antenna 12.
  • Two antennas 12 are matched to the radio circuit 13.
  • the radio circuit 13 outputs a transmission signal to the second antenna 12 during a period in which the matching signal V ⁇ b> 21 is input to the second antenna 12.
  • the antenna device 10 periodically switches between the first antenna 11 and the second antenna 12 and transmits a transmission signal.
  • the control circuit 15 alternately switches the first antenna 11 and the second antenna 12 to a receivable state during signal reception standby. Specifically, the control circuit 15 operates the switching circuit 14 during signal reception standby, and changes the connection state between the first antenna 11 and the second antenna 12 and the radio circuit 13 to the first connection state A1 and the first connection state A1. Switching between two connection states A2 periodically.
  • the control circuit 15 controls the antennas 11 and 12 as follows.
  • the control circuit 15 inputs the matching signal V11 to the matching circuit 11b of the first antenna 11, matches the first antenna 11 to the radio circuit 13, and inputs the mismatch signal V22 to the matching circuit 12b of the second antenna 12.
  • the antenna 12 is mismatched with the radio circuit 13.
  • the control circuit 15 controls the antennas 11 and 12 as follows.
  • the control circuit 15 inputs the mismatch signal V12 to the matching circuit 11b of the first antenna 11, makes the first antenna 11 mismatch to the radio circuit 13, and inputs the matching signal V21 to the matching circuit 12b of the second antenna 12.
  • Two antennas 12 are matched to the radio circuit 13.
  • control circuit 15 compares the output signals of both antennas 11 and 12 with the threshold value. When determining that any one of the output signals is higher than the threshold, the control circuit 15 compares the output signal of the first antenna 11 and the output signal of the second antenna 12 in a predetermined comparison period TC, and the output level is Choose a high antenna. Then, the selected antenna and the radio circuit 13 are connected by the switching circuit 14. Further, the control circuit 15 controls the matching circuits 11b and 12b to match the selected antenna and the radio circuit 13 and to make the unselected antenna and the radio circuit 13 mismatch.
  • the control circuit 15 connects one antenna to the radio circuit 13 and inputs a matching signal to one antenna when transmitting a transmission signal, waiting for signal reception, or receiving a reception signal. As a result, the antenna is matched with the radio circuit 13.
  • the other antenna is not connected to the radio circuit 13, and a mismatch signal is input to the other antenna to make the antenna mismatch with the radio circuit 13.
  • a difference in gain occurs between the antennas 11 and 12, and an electric field is hardly formed in the unselected antenna, so that the coupling between the antennas 11 and 12 is reduced.
  • the antennas 11 and 12 are not connected to each other, coupling via a circuit (that is, a conductor on the substrate or a capacitive element formed on the substrate) is also suppressed.
  • the antenna device 30 according to the second embodiment is applied to the system 5 shown in FIG. 1B, for example.
  • the antenna device 30 transmits and receives signals having different frequencies using a plurality of antennas.
  • the antenna device 30 includes a first antenna 31, a second antenna 32, a first radio circuit 33 connected to the first antenna 31, a second radio circuit 34 connected to the second antenna 32, and a control circuit 35. And a storage device 36.
  • the first antenna 31 includes an antenna unit 31a and a matching circuit 31b.
  • the second antenna 32 includes an antenna part 32a and a matching circuit 32b.
  • the configurations of the antenna units 31a and 32a and the matching circuits 31b and 32b are the same as those shown in the first embodiment.
  • the storage device 36 stores matching signals and mismatching signals (that is, applied voltages) set in the antennas 31 and 32 in accordance with those shown in the first embodiment.
  • the first radio circuit 33 forms a transmission signal of a specific frequency (for example, 426 MHz) or processes a reception signal of the specific frequency received by the first antenna 31.
  • the second radio circuit 34 forms a transmission signal having a specific frequency (for example, 920 MHz) or processes a reception signal having a specific frequency received by the second antenna 32.
  • the frequency of the signal processed by the first radio circuit 33 and the signal processed by the second radio circuit 34 are different.
  • the control circuit 35 controls the first antenna 31 and the second antenna 32 at the time of signal transmission and signal reception. Specifically, the control circuit 35 causes the first antenna 31 and the second antenna 32 to be matched with the radio circuit or mismatched with the radio circuit.
  • the control for matching the antenna with the radio circuit and the control for making the antenna mismatch with the radio circuit conform to the control shown in the first embodiment.
  • the control circuit 35 selects one of the first antenna 31 and the second antenna 32 and transmits a transmission signal using the selected antenna. Then, the control circuit 35 controls the matching circuit of the selected antenna so that the selected antenna and the radio circuit connected to the selected antenna match at the transmission frequency. The control circuit 35 is selected so that the unselected antenna and the radio circuit connected to the unselected antenna are mismatched at the transmission frequency while controlling the matching circuit of the selected antenna. No antenna matching circuit to control.
  • the control method of the matching circuits 31b and 32b is in accordance with the first embodiment. Further, the control circuit 35 operates only the radio circuit connected to the selected antenna among the first radio circuit 33 and the second radio circuit 34 and does not operate the radio circuit connected to the unselected antenna. .
  • the control circuit 35 alternately switches the first antenna 31 and the second antenna 32 to a receivable state during signal reception standby.
  • the control circuit 35 controls the matching circuits 31b and 32b to match the selected antenna and the radio circuit connected to the selected antenna at the reception frequency, and is connected to the unselected antenna and the unselected antenna.
  • the wireless circuit is mismatched at the reception frequency.
  • the control method of the matching circuits 31b and 32b is in accordance with the first embodiment. Further, the control circuit 35 operates only the radio circuit connected to the selected antenna among the first radio circuit 33 and the second radio circuit 34 and does not operate the radio circuit connected to the unselected antenna. .
  • the control circuit 35 controls the matching circuits of the antennas 31 and 32 as follows. That is, the control circuit 35 controls the matching circuit of one antenna so that the one antenna that has received the received signal matches the radio circuit connected to the antenna at the reception frequency. Further, the control circuit 35 controls the matching circuit of the other antenna so that the other antenna and the radio circuit connected to the antenna are mismatched at the reception frequency. At this time, the control circuit 35 operates the radio circuit connected to the matched antenna and does not operate other radio circuits.
  • the frequencies of signals transmitted and received by the antennas 31 and 32 are different.
  • the frequency of one signal is an integer multiple of the frequency of the other signal or a value close thereto (for example, 426 MHz and 920 MHz)
  • the control circuit 35 controls the matching circuit of the selected antenna at the time of transmission of the transmission signal, at the time of signal reception standby or at the time of reception of the reception signal, thereby controlling the antenna and the radio connected to the antenna.
  • the circuit is matched at the transmit / receive frequency.
  • the antenna and a radio circuit connected to the antenna are mismatched in the transmission / reception frequency. Furthermore, the control circuit 35 does not operate the radio circuit connected to the unselected antenna. As a result, a difference in gain occurs between the antennas 31 and 32, and an electric field is hardly formed in an unselected antenna, so that the coupling between the antennas 31 and 32 is reduced.
  • the control circuit 15 (35) performs the following control.
  • control circuit 15 matches the selected antenna and the radio circuit connected to the selected antenna at the transmission frequency, and outputs the transmission signal only to the selected antenna. (33, 34) is controlled.
  • the radio circuit 13 (33, 34) is controlled so that the selected antenna and the radio circuit connected to the selected antenna are matched at the reception frequency and the signal is received only from the selected antenna. To do. As a result, an electric field is less likely to be generated in an unselected antenna, and coupling between both antennas 11 and 12 (31, 32) is suppressed, and a decrease in transmission / reception level during signal transmission / reception is suppressed.
  • the antenna device 10 transmits and receives a signal of a specific frequency, and includes a switching circuit 14.
  • the control circuit 15 controls the switching circuit 14 during signal transmission / reception to connect the selected antenna and the radio circuit 13, and does not connect the unselected antenna and the radio circuit 13. According to this configuration, since both antennas are not connected, coupling between both antennas 11 and 12 via the radio circuit 13 is difficult to occur.
  • the antenna device 30 transmits and receives signals of a plurality of specific frequencies.
  • the control circuit 35 matches the selected antenna and the radio circuit connected to the selected antenna at the transmission / reception frequency, and operates the radio circuit connected to the selected antenna. Further, the control circuit 35 makes the unselected antenna and the wireless circuit connected to the unselected antenna inconsistent, and does not operate the wireless circuit connected to the unselected antenna. Thereby, since it is suppressed that an electric field is formed with the antenna which is not selected, the coupling
  • an electric field is hardly generated in an unselected antenna, and coupling between both antennas 11 and 12 (31, 32) occurs. This suppresses the decrease in transmission / reception level during signal transmission / reception.
  • the antenna devices 10 and 30 include two antennas, but the number of antennas may be three or more. In this case, the antenna to be used is switched in order. Further, the configuration of the matching circuits 11b, 12b, 31b, and 32b is not limited to the embodiment, and may include a coil or a resistor.
  • a technical idea that can be grasped from each of the above embodiments will be described.
  • Appendix 1 A plurality of antennas (11, 12; 31, 32) each including a matching circuit (11b, 12b; 31b, 32b) for adjusting impedance;
  • the matching circuit is controlled so that the unselected antenna and the radio circuit are mismatched, and when the signal is transmitted, the radio circuit is controlled to output a signal to the selected antenna, and when the signal is received, the selected antenna is selected.
  • the control circuit (15) controls the switching circuit so as to connect the selected antenna and the radio circuit and not connect the non-selected antenna and the radio circuit at the time of signal transmission / reception,
  • the antenna device (10) according to appendix 1.
  • the radio circuit (33; 34) is one of a plurality of radio circuits (33, 34) for processing signals having different frequencies, Each of the plurality of antennas (31, 32) is connected to one of the plurality of radio circuits (33, 34), and the plurality of antennas transmit and receive signals having different frequencies.
  • the control circuit (35) operates the radio circuit connected to the selected antenna and does not operate the radio circuit connected to the non-selected antenna when transmitting and receiving signals.

Abstract

An antenna apparatus (10) is provided with a plurality of antennas (11, 12) each including a matching circuit (11b, 12b), a control circuit (15) for controlling the matching circuit of each antenna and thereby adjusting the impedance of each antenna, and a wireless circuit (13) for processing the signals transmitted and received by each antenna. The control circuit selects one of the plurality of antennas, controls the matching circuit of the selected antenna to match the selected antenna and the wireless circuit, and controls the matching circuits of the unselected antennas so that the unselected antennas and the wireless circuit do not match. The control circuit controls the wireless circuit so as to output a signal to the selected antenna during signal transmission, and controls the wireless circuit so as to receive the signal from the selected antenna during signal reception.

Description

アンテナ装置及び信号送受信方法Antenna device and signal transmission / reception method
　本発明は、複数のアンテナを有するアンテナ装置及び信号送受信方法に関する。 The present invention relates to an antenna device having a plurality of antennas and a signal transmission / reception method.
　複数のアンテナを用いて信号を送信または受信するアンテナ装置として、特許文献１に記載の技術が知られている。このアンテナ装置は、信号を送信または受信するとき、２つのアンテナのうちのいずれか一方のアンテナを無線回路部に整合させる。これにより、送信または受信に用いるアンテナを切り替える。 A technique described in Patent Document 1 is known as an antenna device that transmits or receives signals using a plurality of antennas. When transmitting or receiving a signal, this antenna device matches one of the two antennas with the radio circuit unit. Thereby, the antenna used for transmission or reception is switched.
特開２０１０－８１１６１号公報JP 2010-81161 A
　しかし、従来構成においてアンテナ間で結合が生じることがある。例えば、２つのアンテナが近い距離に配置されているときに、このような結合が生じ、送信レベルまたは受信レベルが低下する。本発明は、このような問題点に着目してなされたものであって、その目的は、信号送受信時において送受信レベルの低下を抑制することができるアンテナ装置及び信号送受信方法を提供することにある。 However, coupling may occur between antennas in the conventional configuration. For example, such coupling occurs when two antennas are arranged at a short distance, and the transmission level or the reception level decreases. The present invention has been made paying attention to such problems, and an object thereof is to provide an antenna device and a signal transmission / reception method capable of suppressing a decrease in transmission / reception level during signal transmission / reception. .
　一態様のアンテナ装置は、インピーダンスを調整する整合回路をそれぞれ含む複数のアンテナと、前記各アンテナの前記整合回路を制御することにより前記各アンテナのインピーダンスを調整する制御回路と、前記各アンテナが送受信する信号を処理する無線回路とを備え、前記制御回路は、前記複数のアンテナのいずれか一つを選択し、選択したアンテナの前記整合回路を制御して前記選択したアンテナと前記無線回路との整合をとり、選択されていないアンテナの前記整合回路を制御して前記選択されていないアンテナと前記無線回路とを不整合にし、信号送信時、選択したアンテナに信号を出力するように前記無線回路を制御し、信号受信時、選択したアンテナからの信号を受信するように前記無線回路を制御する。 An antenna device according to one aspect includes a plurality of antennas each including a matching circuit that adjusts impedance, a control circuit that adjusts impedance of each antenna by controlling the matching circuit of each antenna, and each antenna transmits and receives A radio circuit that processes a signal to be transmitted, wherein the control circuit selects any one of the plurality of antennas and controls the matching circuit of the selected antenna to control the selected antenna and the radio circuit. The wireless circuit is configured to match, control the matching circuit of the unselected antenna to make the unselected antenna and the wireless circuit mismatch, and output a signal to the selected antenna during signal transmission The radio circuit is controlled to receive a signal from the selected antenna when receiving a signal.
　一態様の信号送受信方法は、複数のアンテナを用いて信号を送受信する信号送受信方法であって、前記複数のアンテナのうちいずれか一つを選択すること、選択したアンテナと無線回路とが整合するように前記選択したアンテナのインピーダンスを調整すること、選択されていないアンテナと前記無線回路とが整合しないように前記選択されていないアンテナのインピーダンスを調整することを備える。前記選択されていないアンテナのインピーダンスを調整することは、前記選択されていないアンテナと前記無線回路とを非接続にすること、または前記選択されていないアンテナに接続された前記無線回路を動作させないことを含む。 A signal transmission / reception method according to one aspect is a signal transmission / reception method that transmits / receives a signal using a plurality of antennas, wherein one of the plurality of antennas is selected, and the selected antenna matches a radio circuit. Adjusting the impedance of the selected antenna, and adjusting the impedance of the unselected antenna so that the unselected antenna and the radio circuit do not match. Adjusting the impedance of the non-selected antenna is to disconnect the non-selected antenna and the radio circuit, or not to operate the radio circuit connected to the non-selected antenna. including.
　上記アンテナ装置及び信号送受信方法は、信号送受信時において送受信レベルの低下を抑制する。 The antenna device and the signal transmission / reception method suppress a decrease in transmission / reception level during signal transmission / reception.
（ａ）は、第１実施形態に係るアンテナ装置が用いられるシステムの模式図、（ｂ）は、第２実施形態に係るアンテナ装置が用いられるシステムの模式図。(A) is a schematic diagram of a system in which the antenna device according to the first embodiment is used, and (b) is a schematic diagram of a system in which the antenna device according to the second embodiment is used. 第１実施形態に係るアンテナ装置のブロック図。The block diagram of the antenna device which concerns on 1st Embodiment. 図２のアンテナ装置の第１アンテナの回路図。The circuit diagram of the 1st antenna of the antenna apparatus of FIG. 信号送信時におけるアンテナ装置のタイムチャート。The time chart of the antenna apparatus at the time of signal transmission. 信号受信時におけるアンテナ装置のタイムチャート。The time chart of the antenna apparatus at the time of signal reception. 第２実施形態に係るアンテナ装置のブロック図。The block diagram of the antenna device which concerns on 2nd Embodiment.
　図１（ａ）は、第１実施形態に示すアンテナ装置が用いられるシステム１を示す。システム１は、電気機器２（例えば、照明）と、電気機器２を動作させるスイッチ３と、電気機器２を制御するコントローラ４とを備える。照明のスイッチ３は、コントローラ４から送信される信号に基づいて照明を動作させる。コントローラ４は、スイッチ３に信号を送信したり、スイッチ３からの信号を受信したりする。信号の周波数は、１００ＭＨｚ～１０ＧＨｚ範囲内の特定周波数（例えば、４２６ＭＨｚ）に規定される。スイッチ３とコントローラ４との間の送受信の信頼性を高めることを目的とし、ダイバーシチ効果が利用される。具体的には、コントローラ４内のアンテナ装置１０（図２参照）は複数のアンテナを備える。 FIG. 1 (a) shows a system 1 in which the antenna device shown in the first embodiment is used. The system 1 includes an electrical device 2 (for example, lighting), a switch 3 that operates the electrical device 2, and a controller 4 that controls the electrical device 2. The illumination switch 3 operates the illumination based on a signal transmitted from the controller 4. The controller 4 transmits a signal to the switch 3 and receives a signal from the switch 3. The frequency of the signal is defined as a specific frequency (for example, 426 MHz) within a range of 100 MHz to 10 GHz. A diversity effect is used for the purpose of improving the reliability of transmission and reception between the switch 3 and the controller 4. Specifically, the antenna device 10 (see FIG. 2) in the controller 4 includes a plurality of antennas.
　図１（ｂ）は、第２実施形態に示すアンテナ装置が用いられるシステム５の例を示す。システム５は、複数の電気機器６，７と、第１の電気機器６を動作させる第１制御装置６ａ（例えば、スイッチ）と、第２の電気機器７を制御する第２制御装置７ａと、第１制御装置６ａと第２制御装置７ａとを管理する管理装置８とを備える。第１の電気機器６は例えば照明であり、第２の電気機器７は例えば太陽電池である。管理装置８は、周波数が異なる信号を用いて第１制御装置６ａ及び第２制御装置７ａのそれぞれと通信する。例えば、管理装置８は、第１周波数（例えば、４２６ＭＨｚ）の信号を用いて、第１制御装置６ａと通信する。管理装置８は、第２周波数（例えば、９２０ＭＨｚ）の信号を用いて、第２制御装置７ａと通信する。管理装置８のアンテナ装置３０（図６参照）は、第１周波数の信号を送受信するアンテナと、第２周波数の信号を送受信するアンテナとを備える。 FIG. 1B shows an example of a system 5 in which the antenna device shown in the second embodiment is used. The system 5 includes a plurality of electrical devices 6, 7, a first control device 6 a (for example, a switch) that operates the first electrical device 6, a second control device 7 a that controls the second electrical device 7, The management apparatus 8 which manages the 1st control apparatus 6a and the 2nd control apparatus 7a is provided. The first electric device 6 is, for example, illumination, and the second electric device 7 is, for example, a solar battery. The management device 8 communicates with each of the first control device 6a and the second control device 7a using signals having different frequencies. For example, the management device 8 communicates with the first control device 6a using a signal having a first frequency (for example, 426 MHz). The management device 8 communicates with the second control device 7a using a signal having a second frequency (for example, 920 MHz). The antenna device 30 (see FIG. 6) of the management device 8 includes an antenna that transmits and receives a first frequency signal and an antenna that transmits and receives a second frequency signal.
　以上のように、無線信号で電気機器を制御する場合、コントローラ４や管理装置８には複数のアンテナが配置される。コントローラ４や管理装置８は、配置スペースが小さいことが好ましく、その大きさには制限がある。このようなことから、コントローラ４や管理装置８内に配置される複数のアンテナ間の距離が近くなる。ここで、「近い」とは、信号の送信または受信のときに、複数のアンテナ間で結合が生じないアンテナ間距離の最小距離よりも短いことを示す。このため、アンテナ間の距離が近い場合、これらの装置（コントローラ４や管理装置８）では、信号の送信時または受信時にアンテナ間で結合が生じ得る。以下に示されるアンテナ装置１０，３０（図２及び図６参照）はアンテナ間の結合を抑制する。 As described above, when an electric device is controlled with a radio signal, the controller 4 and the management device 8 are provided with a plurality of antennas. The controller 4 and the management device 8 preferably have a small arrangement space and have a limited size. For this reason, the distance between the plurality of antennas arranged in the controller 4 and the management device 8 is reduced. Here, “close” indicates that the distance between the antennas at which no coupling occurs between the plurality of antennas is shorter than the minimum distance at the time of signal transmission or reception. For this reason, when the distance between the antennas is short, in these devices (the controller 4 and the management device 8), coupling may occur between the antennas at the time of signal transmission or reception. The antenna devices 10 and 30 (see FIGS. 2 and 6) shown below suppress coupling between antennas.
　（第１実施形態）
　図２及び図３を参照して、第１実施形態に係るアンテナ装置１０について説明する。アンテナ装置１０は、例えば図１（ａ）に示したシステム１に適用される。アンテナ装置１０は、複数のアンテナ１１，１２を用いて特定周波数（例えば、４２６ＭＨｚ）の信号を送受信する。アンテナ装置１０は、第１アンテナ１１と、第２アンテナ１２と、無線回路１３と、切替回路１４と、制御回路１５と、記憶装置１６とを備える。第１アンテナ１１は、アンテナ部１１ａと整合回路１１ｂとを有する。アンテナ部１１ａは、例えばループまたはバー形状に構成される。アンテナ部１１ａはグランドに接続される。第２アンテナ１２は、アンテナ部１２ａと整合回路１２ｂとを有する。第１アンテナ１１と第２アンテナ１２とは同じ構造を有する。 (First embodiment)
With reference to FIG.2 and FIG.3, the antenna apparatus 10 which concerns on 1st Embodiment is demonstrated. The antenna device 10 is applied to, for example, the system 1 shown in FIG. The antenna device 10 transmits and receives a signal of a specific frequency (for example, 426 MHz) using the plurality of antennas 11 and 12. The antenna device 10 includes a first antenna 11, a second antenna 12, a radio circuit 13, a switching circuit 14, a control circuit 15, and a storage device 16. The first antenna 11 includes an antenna unit 11a and a matching circuit 11b. The antenna unit 11a is configured in a loop or bar shape, for example. The antenna unit 11a is connected to the ground. The second antenna 12 includes an antenna unit 12a and a matching circuit 12b. The first antenna 11 and the second antenna 12 have the same structure.
　整合回路１１ｂは、第１アンテナ１１のインピーダンスを変更するための回路である。図３に示すように、整合回路１１ｂは、ループアンテナの場合、ループアンテナ内に設けられ得る。整合回路１１ｂは、可変容量素子２１と容量素子２２とを含む。可変容量素子２１は、入力信号（例えば、印加電圧）によって静電容量の調整が可能な素子を示す。可変容量素子２１としては、例えば可変容量ダイオードが用いられる。 The matching circuit 11b is a circuit for changing the impedance of the first antenna 11. As shown in FIG. 3, in the case of a loop antenna, the matching circuit 11b can be provided in the loop antenna. The matching circuit 11 b includes a variable capacitance element 21 and a capacitance element 22. The variable capacitance element 21 is an element whose capacitance can be adjusted by an input signal (for example, applied voltage). As the variable capacitance element 21, for example, a variable capacitance diode is used.
　無線回路１３は、送信信号を形成したり、第１アンテナ１１または第２アンテナ１２により受信した受信信号を処理したりする。切替回路１４は、第１アンテナ１１と無線回路１３との間かつ第２アンテナ１２と無線回路１３との間に配置される。切替回路１４は、制御回路１５の指令に基づいて、第１接続状態Ａ１と第２接続状態Ａ２とのいずれかの状態に切り替わる。第１接続状態Ａ１は、切替回路１４が第１アンテナ１１と無線回路１３とを接続しかつ第２アンテナ１２を無線回路１３に接続しない状態を示す。第２接続状態Ａ２は、切替回路１４が第２アンテナ１２と無線回路１３とを接続しかつ第１アンテナ１１を無線回路１３に接続しない状態を示す。第１接続状態Ａ１及び第２接続状態Ａ２のいずれの状態でも、第１アンテナ１１と第２アンテナ１２との間は非接続状態である。切替回路１４は、例えば半導体スイッチング素子により構成される。 The radio circuit 13 forms a transmission signal or processes a reception signal received by the first antenna 11 or the second antenna 12. The switching circuit 14 is disposed between the first antenna 11 and the radio circuit 13 and between the second antenna 12 and the radio circuit 13. The switching circuit 14 switches to one of the first connection state A1 and the second connection state A2 based on a command from the control circuit 15. The first connection state A1 indicates a state in which the switching circuit 14 connects the first antenna 11 and the wireless circuit 13 and does not connect the second antenna 12 to the wireless circuit 13. The second connection state A2 indicates a state in which the switching circuit 14 connects the second antenna 12 and the radio circuit 13 and does not connect the first antenna 11 to the radio circuit 13. In any state of the first connection state A1 and the second connection state A2, the first antenna 11 and the second antenna 12 are not connected. The switching circuit 14 is configured by, for example, a semiconductor switching element.
　制御回路１５は、信号送信時及び信号受信時（信号を待つ待機時を含む）、第１アンテナ１１、第２アンテナ１２及び切替回路１４を制御する。具体的には、制御回路１５は、第１アンテナ１１及び第２アンテナ１２を、無線回路１３に対して、整合させたり不整合にしたりする。 The control circuit 15 controls the first antenna 11, the second antenna 12, and the switching circuit 14 at the time of signal transmission and signal reception (including standby time for waiting for a signal). Specifically, the control circuit 15 matches or mismatches the first antenna 11 and the second antenna 12 with respect to the radio circuit 13.
　制御回路１５は、アンテナ１１，１２を整合させる制御において、無線回路１３に対するアンテナ１１，１２の送信レベルまたは受信レベルが高くなるように、整合回路１１ｂ，１２ｂに印加するパラメータ（例えば、印加電圧）を調整する。アンテナ１１，１２が無線回路１３に対して整合するパラメータ（印加電圧）は、予め設定されている。例えば、アンテナ装置１０の製造時において、整合回路１１ｂ，１２ｂに入力する印加電圧を変化させて、無線回路１３に整合する印加電圧（送信レベル及び受信レベルが第１基準値よりも高くなる印加電圧）を検出する。検出された印加電圧は、アンテナ装置１０の記憶装置１６に記録される。以下、無線回路１３に対してアンテナが整合するようになるパラメータ（印加電圧）を「整合信号」という。 In the control for matching the antennas 11 and 12, the control circuit 15 applies parameters (for example, applied voltage) applied to the matching circuits 11 b and 12 b so that the transmission level or reception level of the antennas 11 and 12 with respect to the radio circuit 13 is increased. Adjust. Parameters (applied voltages) with which the antennas 11 and 12 are matched with the radio circuit 13 are set in advance. For example, when the antenna device 10 is manufactured, the applied voltage input to the matching circuits 11b and 12b is changed to apply the matching voltage to the wireless circuit 13 (the applied voltage at which the transmission level and the reception level are higher than the first reference value). ) Is detected. The detected applied voltage is recorded in the storage device 16 of the antenna device 10. Hereinafter, a parameter (applied voltage) that allows the antenna to be matched to the radio circuit 13 is referred to as a “matching signal”.
　制御回路１５は、アンテナ１１，１２を不整合にする制御において、送信信号または受信信号に対するアンテナ１１，１２の送信レベルまたは受信レベルが低くなるように、整合回路１１ｂ，１２ｂに印加するパラメータ（例えば、印加電圧）を調整する。アンテナ１１，１２が無線回路１３に整合しないパラメータ（印加電圧）は、予め設定されている。例えば、アンテナ装置１０の製造時において、整合回路１１ｂ，１２ｂに入力する印加電圧を変化させて、無線回路１３に整合しない印加電圧（第１基準値よりも低い第２基準値よりも送信レベル及び受信レベルが低くなる印加電圧）を検出する。検出された印加電圧は、アンテナ装置１０の記憶装置１６に記録される。以下、無線回路１３に対してアンテナが整合しなくなるパラメータ（印加電圧）を「不整合信号」という。 In the control for making the antennas 11 and 12 unmatched, the control circuit 15 applies parameters (for example, to the matching circuits 11b and 12b so that the transmission level or the reception level of the antennas 11 and 12 with respect to the transmission signal or the reception signal becomes low). , Applied voltage). Parameters (applied voltages) that do not match the antennas 11 and 12 with the wireless circuit 13 are set in advance. For example, when the antenna device 10 is manufactured, the applied voltage input to the matching circuits 11b and 12b is changed, and the applied voltage that does not match the wireless circuit 13 (the transmission level and the second reference value lower than the first reference value). The applied voltage at which the reception level decreases) is detected. The detected applied voltage is recorded in the storage device 16 of the antenna device 10. Hereinafter, a parameter (applied voltage) at which the antenna does not match the wireless circuit 13 is referred to as a “mismatch signal”.
　図２及び図４を参照して、信号送信時のアンテナ装置１０の動作を説明する。
　制御回路１５は、信号送信時、第１アンテナ１１と第２アンテナ１２とを用いて送信信号を送信する。具体的には、制御回路１５は、信号送信時、切替回路１４を動作させて、第１アンテナ１１と第２アンテナ１２と無線回路１３との接続状態を第１接続状態Ａ１と第２接続状態Ａ２との間で周期的に切り替える。 With reference to FIG.2 and FIG.4, operation | movement of the antenna apparatus 10 at the time of signal transmission is demonstrated.
The control circuit 15 transmits a transmission signal using the first antenna 11 and the second antenna 12 during signal transmission. Specifically, the control circuit 15 operates the switching circuit 14 during signal transmission to change the connection state between the first antenna 11, the second antenna 12, and the radio circuit 13 to the first connection state A 1 and the second connection state. Switch periodically with A2.
　切替回路１４が第１接続状態Ａ１であるとき、制御回路１５は各アンテナ１１，１２を次のように制御する。制御回路１５は、整合信号Ｖ１１を第１アンテナ１１の整合回路１１ｂに入力し第１アンテナ１１を無線回路１３に整合させ、不整合信号Ｖ２２を第２アンテナ１２の整合回路１２ｂに入力し第２アンテナ１２を無線回路１３に不整合にする。また、第１アンテナ１１に整合信号Ｖ１１が入力されている期間に、無線回路１３は、送信信号を第１アンテナ１１に出力する。 When the switching circuit 14 is in the first connection state A1, the control circuit 15 controls the antennas 11 and 12 as follows. The control circuit 15 inputs the matching signal V11 to the matching circuit 11b of the first antenna 11, matches the first antenna 11 to the radio circuit 13, and inputs the mismatch signal V22 to the matching circuit 12b of the second antenna 12. The antenna 12 is mismatched with the radio circuit 13. Further, the radio circuit 13 outputs a transmission signal to the first antenna 11 during a period in which the matching signal V <b> 11 is input to the first antenna 11.
　切替回路１４が第２接続状態Ａ２であるとき、制御回路１５は各アンテナ１１，１２を次のように制御する。制御回路１５は、不整合信号Ｖ１２を第１アンテナ１１の整合回路１１ｂに入力し第１アンテナ１１を無線回路１３に不整合にし、整合信号Ｖ２１を第２アンテナ１２の整合回路１２ｂに入力し第２アンテナ１２を無線回路１３に整合させる。また、第２アンテナ１２に整合信号Ｖ２１が入力されている期間に、無線回路１３は、送信信号を第２アンテナ１２に出力する。以上のように、アンテナ装置１０は、第１アンテナ１１と第２アンテナ１２とを周期的に切り替えて、送信信号を送信する。 When the switching circuit 14 is in the second connection state A2, the control circuit 15 controls the antennas 11 and 12 as follows. The control circuit 15 inputs the mismatch signal V12 to the matching circuit 11b of the first antenna 11, makes the first antenna 11 mismatch to the radio circuit 13, and inputs the matching signal V21 to the matching circuit 12b of the second antenna 12. Two antennas 12 are matched to the radio circuit 13. Further, the radio circuit 13 outputs a transmission signal to the second antenna 12 during a period in which the matching signal V <b> 21 is input to the second antenna 12. As described above, the antenna device 10 periodically switches between the first antenna 11 and the second antenna 12 and transmits a transmission signal.
　図２及び図５を参照して、信号受信待機時及び信号受信時のアンテナ装置１０の動作を説明する。制御回路１５は、信号受信待機時、第１アンテナ１１と第２アンテナ１２とを交互に受信可能状態に切り替える。具体的には、制御回路１５は、信号受信待機時、切替回路１４を動作させて、第１アンテナ１１及び第２アンテナ１２と無線回路１３との間の接続状態を第１接続状態Ａ１と第２接続状態Ａ２との間で周期的に切り替える。 With reference to FIG. 2 and FIG. 5, the operation of the antenna device 10 during signal reception standby and during signal reception will be described. The control circuit 15 alternately switches the first antenna 11 and the second antenna 12 to a receivable state during signal reception standby. Specifically, the control circuit 15 operates the switching circuit 14 during signal reception standby, and changes the connection state between the first antenna 11 and the second antenna 12 and the radio circuit 13 to the first connection state A1 and the first connection state A1. Switching between two connection states A2 periodically.
　切替回路１４が第１接続状態Ａ１であるとき、制御回路１５は各アンテナ１１，１２を次のように制御する。制御回路１５は、整合信号Ｖ１１を第１アンテナ１１の整合回路１１ｂに入力し第１アンテナ１１を無線回路１３に整合させ、不整合信号Ｖ２２を第２アンテナ１２の整合回路１２ｂに入力し第２アンテナ１２を無線回路１３に不整合にする。 When the switching circuit 14 is in the first connection state A1, the control circuit 15 controls the antennas 11 and 12 as follows. The control circuit 15 inputs the matching signal V11 to the matching circuit 11b of the first antenna 11, matches the first antenna 11 to the radio circuit 13, and inputs the mismatch signal V22 to the matching circuit 12b of the second antenna 12. The antenna 12 is mismatched with the radio circuit 13.
　切替回路１４が第２接続状態Ａ２であるとき、制御回路１５は各アンテナ１１，１２を次のように制御する。制御回路１５は、不整合信号Ｖ１２を第１アンテナ１１の整合回路１１ｂに入力し第１アンテナ１１を無線回路１３に不整合にし、整合信号Ｖ２１を第２アンテナ１２の整合回路１２ｂに入力し第２アンテナ１２を無線回路１３に整合させる。 When the switching circuit 14 is in the second connection state A2, the control circuit 15 controls the antennas 11 and 12 as follows. The control circuit 15 inputs the mismatch signal V12 to the matching circuit 11b of the first antenna 11, makes the first antenna 11 mismatch to the radio circuit 13, and inputs the matching signal V21 to the matching circuit 12b of the second antenna 12. Two antennas 12 are matched to the radio circuit 13.
　また、制御回路１５は、両アンテナ１１，１２の出力信号と閾値とを比較する。制御回路１５は、いずれかの出力信号が閾値よりも高いと判定するとき、所定の比較期間ＴＣにおいて第１アンテナ１１の出力信号と第２アンテナ１２の出力信号とを比較して、出力レベルが高いアンテナを選択する。そして、切替回路１４により、選択したアンテナと無線回路１３とを接続する。更に、制御回路１５は、整合回路１１ｂ，１２ｂを制御して、選択したアンテナと無線回路１３とを整合させ、選択されていないアンテナと無線回路１３とを不整合にする。 Further, the control circuit 15 compares the output signals of both antennas 11 and 12 with the threshold value. When determining that any one of the output signals is higher than the threshold, the control circuit 15 compares the output signal of the first antenna 11 and the output signal of the second antenna 12 in a predetermined comparison period TC, and the output level is Choose a high antenna. Then, the selected antenna and the radio circuit 13 are connected by the switching circuit 14. Further, the control circuit 15 controls the matching circuits 11b and 12b to match the selected antenna and the radio circuit 13 and to make the unselected antenna and the radio circuit 13 mismatch.
　次に制御回路１５の作用を説明する。従来技術では、第１アンテナ１１及び第２アンテナ１２のうちの一方を整合し、他方を不整合にする。このような構成だけでも両アンテナ１１，１２間の結合が低下するが、両アンテナ１１，１２の結合に基づいて十分な利得が得られない場合がある。両アンテナ１１，１２に利得の差があるものの、送受信時には両アンテナ１１，１２ともに動作し、両アンテナ１１，１２が結合するためである。そこで、上述のように、制御回路１５は、送信信号の送信時、信号受信待機時または受信信号の受信時、一方のアンテナを無線回路１３に接続し、かつ一方のアンテナに整合信号を入力することによりそのアンテナを無線回路１３に整合させる。更に、他方のアンテナと無線回路１３とは接続せず、他方のアンテナに不整合信号を入力することによりそのアンテナを無線回路１３に対して不整合にする。これにより、両アンテナ１１，１２に利得の差が生じ、かつ選択されていないアンテナにおいて電界が形成され難くなるため、両アンテナ１１，１２間の結合が低下する。また、両アンテナ１１，１２間が非接続であるため、回路（即ち基板上の導体または基板上に形成される容量要素）を介しての結合も抑制される。 Next, the operation of the control circuit 15 will be described. In the prior art, one of the first antenna 11 and the second antenna 12 is matched, and the other is mismatched. Even with such a configuration alone, the coupling between the two antennas 11 and 12 is reduced, but a sufficient gain may not be obtained based on the coupling of the two antennas 11 and 12. This is because, although there is a difference in gain between both antennas 11 and 12, both antennas 11 and 12 operate during transmission and reception, and both antennas 11 and 12 are coupled. Therefore, as described above, the control circuit 15 connects one antenna to the radio circuit 13 and inputs a matching signal to one antenna when transmitting a transmission signal, waiting for signal reception, or receiving a reception signal. As a result, the antenna is matched with the radio circuit 13. Further, the other antenna is not connected to the radio circuit 13, and a mismatch signal is input to the other antenna to make the antenna mismatch with the radio circuit 13. As a result, a difference in gain occurs between the antennas 11 and 12, and an electric field is hardly formed in the unselected antenna, so that the coupling between the antennas 11 and 12 is reduced. Further, since the antennas 11 and 12 are not connected to each other, coupling via a circuit (that is, a conductor on the substrate or a capacitive element formed on the substrate) is also suppressed.
　（第２実施形態）
　図６を参照して、第２実施形態に係るアンテナ装置３０について説明する。
　第２実施形態に係るアンテナ装置３０は、例えば図１（ｂ）に示したシステム５に適用される。アンテナ装置３０は、複数のアンテナを用いて周波数の異なる信号を送受信する。 (Second Embodiment)
With reference to FIG. 6, the antenna device 30 according to the second embodiment will be described.
The antenna device 30 according to the second embodiment is applied to the system 5 shown in FIG. 1B, for example. The antenna device 30 transmits and receives signals having different frequencies using a plurality of antennas.
　アンテナ装置３０は、第１アンテナ３１と、第２アンテナ３２と、第１アンテナ３１に接続される第１無線回路３３と、第２アンテナ３２に接続される第２無線回路３４と、制御回路３５と、記憶装置３６とを備える。第１アンテナ３１は、アンテナ部３１ａと整合回路３１ｂとを有する。第２アンテナ３２は、アンテナ部３２ａと整合回路３２ｂとを有する。アンテナ部３１ａ，３２ａ及び整合回路３１ｂ，３２ｂの構成は第１実施形態に示したものに準ずる。記憶装置３６は第１実施形態に示したものに準じ、各アンテナ３１，３２に設定されている整合信号及び不整合信号（即ちそれぞれ印加電圧）を記憶する。 The antenna device 30 includes a first antenna 31, a second antenna 32, a first radio circuit 33 connected to the first antenna 31, a second radio circuit 34 connected to the second antenna 32, and a control circuit 35. And a storage device 36. The first antenna 31 includes an antenna unit 31a and a matching circuit 31b. The second antenna 32 includes an antenna part 32a and a matching circuit 32b. The configurations of the antenna units 31a and 32a and the matching circuits 31b and 32b are the same as those shown in the first embodiment. The storage device 36 stores matching signals and mismatching signals (that is, applied voltages) set in the antennas 31 and 32 in accordance with those shown in the first embodiment.
　第１無線回路３３は、特定周波数（例えば、４２６ＭＨｚ）の送信信号を形成したり、第１アンテナ３１により受信した特定周波数の受信信号を処理したりする。第２無線回路３４は、特定周波数（例えば、９２０ＭＨｚ）の送信信号を形成したり、第２アンテナ３２により受信した特定周波数の受信信号を処理したりする。第１無線回路３３が処理する信号と第２無線回路３４が処理する信号の周波数は異なる。 The first radio circuit 33 forms a transmission signal of a specific frequency (for example, 426 MHz) or processes a reception signal of the specific frequency received by the first antenna 31. The second radio circuit 34 forms a transmission signal having a specific frequency (for example, 920 MHz) or processes a reception signal having a specific frequency received by the second antenna 32. The frequency of the signal processed by the first radio circuit 33 and the signal processed by the second radio circuit 34 are different.
　制御回路３５は、信号送信時及び信号受信時、第１アンテナ３１及び第２アンテナ３２を制御する。具体的には、制御回路３５は、第１アンテナ３１及び第２アンテナ３２を、無線回路に対して整合させたり、無線回路に対して不整合にしたりする。アンテナを無線回路に対して整合させる制御、及びアンテナを無線回路に対して不整合にする制御は、第１実施形態に示した制御に準ずる。 The control circuit 35 controls the first antenna 31 and the second antenna 32 at the time of signal transmission and signal reception. Specifically, the control circuit 35 causes the first antenna 31 and the second antenna 32 to be matched with the radio circuit or mismatched with the radio circuit. The control for matching the antenna with the radio circuit and the control for making the antenna mismatch with the radio circuit conform to the control shown in the first embodiment.
　アンテナ装置３０の動作を説明する。
　制御回路３５は、信号送信時、第１アンテナ３１及び第２アンテナ３２のいずれか一方を選択して、選択したアンテナで送信信号を送信する。そして、制御回路３５は、選択したアンテナと選択したアンテナに接続された無線回路とが送信周波数において整合するように、選択したアンテナの整合回路を制御する。また、制御回路３５は、選択したアンテナの整合回路を制御しつつ、選択されていないアンテナと選択されていないアンテナに接続された無線回路とが送信周波数において不整合となるように、選択されていないアンテナの整合回路を制御する。整合回路３１ｂ，３２ｂの制御方法は第１実施形態に準ずる。また、制御回路３５は、第１無線回路３３と第２無線回路３４とのうち選択したアンテナに接続された無線回路だけを動作させて、選択されていないアンテナに接続された無線回路を動作させない。 The operation of the antenna device 30 will be described.
At the time of signal transmission, the control circuit 35 selects one of the first antenna 31 and the second antenna 32 and transmits a transmission signal using the selected antenna. Then, the control circuit 35 controls the matching circuit of the selected antenna so that the selected antenna and the radio circuit connected to the selected antenna match at the transmission frequency. The control circuit 35 is selected so that the unselected antenna and the radio circuit connected to the unselected antenna are mismatched at the transmission frequency while controlling the matching circuit of the selected antenna. No antenna matching circuit to control. The control method of the matching circuits 31b and 32b is in accordance with the first embodiment. Further, the control circuit 35 operates only the radio circuit connected to the selected antenna among the first radio circuit 33 and the second radio circuit 34 and does not operate the radio circuit connected to the unselected antenna. .
　制御回路３５は、信号受信待機時、第１アンテナ３１と第２アンテナ３２とを交互に受信可能状態に切り替える。
　制御回路３５は、整合回路３１ｂ，３２ｂを制御し、選択したアンテナと選択したアンテナに接続された無線回路とを受信周波数において整合させ、選択されていないアンテナと選択されていないアンテナに接続された無線回路とを受信周波数において不整合にする。整合回路３１ｂ，３２ｂの制御方法は第１実施形態に準ずる。また、制御回路３５は、第１無線回路３３と第２無線回路３４とのうち選択したアンテナに接続された無線回路だけを動作させて、選択されていないアンテナに接続された無線回路を動作させない。 The control circuit 35 alternately switches the first antenna 31 and the second antenna 32 to a receivable state during signal reception standby.
The control circuit 35 controls the matching circuits 31b and 32b to match the selected antenna and the radio circuit connected to the selected antenna at the reception frequency, and is connected to the unselected antenna and the unselected antenna. The wireless circuit is mismatched at the reception frequency. The control method of the matching circuits 31b and 32b is in accordance with the first embodiment. Further, the control circuit 35 operates only the radio circuit connected to the selected antenna among the first radio circuit 33 and the second radio circuit 34 and does not operate the radio circuit connected to the unselected antenna. .
　そして、いずれかのアンテナで受信信号を受信するとき、制御回路３５は、次のように、各アンテナ３１，３２の整合回路を制御する。即ち、制御回路３５は、受信信号を受信した一方のアンテナとそのアンテナに接続された無線回路とが受信周波数において整合するようにその一方のアンテナの整合回路を制御する。また、制御回路３５は、他方のアンテナとそのアンテナに接続された無線回路とが受信周波数において不整合となるようにその他方のアンテナの整合回路を制御する。このとき、制御回路３５は、整合させたアンテナに接続された無線回路を動作させて、他の無線回路を動作させない。 And when receiving a received signal with any of the antennas, the control circuit 35 controls the matching circuits of the antennas 31 and 32 as follows. That is, the control circuit 35 controls the matching circuit of one antenna so that the one antenna that has received the received signal matches the radio circuit connected to the antenna at the reception frequency. Further, the control circuit 35 controls the matching circuit of the other antenna so that the other antenna and the radio circuit connected to the antenna are mismatched at the reception frequency. At this time, the control circuit 35 operates the radio circuit connected to the matched antenna and does not operate other radio circuits.
　次に制御回路３５の作用を説明する。本実施形態では、各アンテナ３１，３２で送受信する信号の周波数が異なる。一方の信号の周波数が他方の信号の周波数の整数倍またはそれに近い値になっている場合（例えば、４２６ＭＨｚと９２０ＭＨｚ）、信号の送受信時にアンテナ３１，３２間の結合が生じ、十分な利得が得られない場合がある。そこで、上述のように、制御回路３５は、送信信号の送信時、信号受信待機時または受信信号の受信時、選択したアンテナの整合回路を制御することによりそのアンテナとそのアンテナに接続された無線回路とを送受信周波数において整合させる。一方、選択されていないアンテナの整合回路を制御することによりそのアンテナとそのアンテナに接続された無線回路とを送受信周波数において不整合にする。さらに、制御回路３５は、選択されていないアンテナに接続された無線回路を動作させない。これにより、両アンテナ３１，３２に利得の差が生じ、かつ選択されていないアンテナにおいて電界が形成され難くなるため、両アンテナ３１，３２の結合が低下する。 Next, the operation of the control circuit 35 will be described. In the present embodiment, the frequencies of signals transmitted and received by the antennas 31 and 32 are different. When the frequency of one signal is an integer multiple of the frequency of the other signal or a value close thereto (for example, 426 MHz and 920 MHz), coupling between the antennas 31 and 32 occurs during signal transmission and reception, and sufficient gain is obtained. It may not be possible. Therefore, as described above, the control circuit 35 controls the matching circuit of the selected antenna at the time of transmission of the transmission signal, at the time of signal reception standby or at the time of reception of the reception signal, thereby controlling the antenna and the radio connected to the antenna. The circuit is matched at the transmit / receive frequency. On the other hand, by controlling a matching circuit of an unselected antenna, the antenna and a radio circuit connected to the antenna are mismatched in the transmission / reception frequency. Furthermore, the control circuit 35 does not operate the radio circuit connected to the unselected antenna. As a result, a difference in gain occurs between the antennas 31 and 32, and an electric field is hardly formed in an unselected antenna, so that the coupling between the antennas 31 and 32 is reduced.
　上記各実施形態に係るアンテナ装置１０，３０の効果を説明する。
　（１）第１及び第２実施形態に係るアンテナ装置１０（３０）では、制御回路１５（３５）は、次の制御を行う。 The effects of the antenna devices 10 and 30 according to the above embodiments will be described.
(1) In the antenna device 10 (30) according to the first and second embodiments, the control circuit 15 (35) performs the following control.
　制御回路１５（３５）は、信号送信時、選択したアンテナと選択したアンテナに接続された無線回路とを送信周波数において整合させて、かつ選択したアンテナだけに送信信号を出力するように無線回路１３（３３，３４）を制御する。 At the time of signal transmission, the control circuit 15 (35) matches the selected antenna and the radio circuit connected to the selected antenna at the transmission frequency, and outputs the transmission signal only to the selected antenna. (33, 34) is controlled.
　また、信号受信時、選択したアンテナと選択したアンテナに接続された無線回路とを受信周波数において整合させて、かつ選択したアンテナからだけ信号を受信するように無線回路１３（３３，３４）を制御する。これにより、選択されていないアンテナで電界が生じ難くなり、両アンテナ１１，１２（３１，３２）間での結合が生じることが抑制されて、信号送受信時において送受信レベルの低下が抑制される。 Further, at the time of signal reception, the radio circuit 13 (33, 34) is controlled so that the selected antenna and the radio circuit connected to the selected antenna are matched at the reception frequency and the signal is received only from the selected antenna. To do. As a result, an electric field is less likely to be generated in an unselected antenna, and coupling between both antennas 11 and 12 (31, 32) is suppressed, and a decrease in transmission / reception level during signal transmission / reception is suppressed.
　（２）第１実施形態に係るアンテナ装置１０は、特定周波数の信号を送受信するものであり、切替回路１４を有する。制御回路１５は、信号の送受信時、切替回路１４を制御して、選択したアンテナと無線回路１３とを接続し、選択されていないアンテナと無線回路１３とを接続しない。この構成によれば、両アンテナが接続することがないため、無線回路１３を介しての両アンテナ１１，１２間の結合が生じ難くなる。 (2) The antenna device 10 according to the first embodiment transmits and receives a signal of a specific frequency, and includes a switching circuit 14. The control circuit 15 controls the switching circuit 14 during signal transmission / reception to connect the selected antenna and the radio circuit 13, and does not connect the unselected antenna and the radio circuit 13. According to this configuration, since both antennas are not connected, coupling between both antennas 11 and 12 via the radio circuit 13 is difficult to occur.
　（３）第２実施形態に係るアンテナ装置３０は、複数の特定周波数の信号を送受信する。制御回路３５は、選択したアンテナと選択したアンテナに接続された無線回路とを送受信周波数において整合させ、選択したアンテナに接続された無線回路を動作させる。また、制御回路３５は、選択されていないアンテナと選択されていないアンテナに接続された無線回路とを不整合にし、選択されていないアンテナに接続された無線回路を動作させない。これにより、選択されていないアンテナで電界が形成されることが抑制されるため、両アンテナ３１，３２間の結合が抑制される。 (3) The antenna device 30 according to the second embodiment transmits and receives signals of a plurality of specific frequencies. The control circuit 35 matches the selected antenna and the radio circuit connected to the selected antenna at the transmission / reception frequency, and operates the radio circuit connected to the selected antenna. Further, the control circuit 35 makes the unselected antenna and the wireless circuit connected to the unselected antenna inconsistent, and does not operate the wireless circuit connected to the unselected antenna. Thereby, since it is suppressed that an electric field is formed with the antenna which is not selected, the coupling | bonding between both the antennas 31 and 32 is suppressed.
　（４）第１実施形態及び第２実施形態に示される信号送受信方法によれば、選択されていないアンテナで電界が生じ難くなり、両アンテナ１１，１２（３１，３２）間での結合が生じることが抑制されて、信号送受信時において送受信レベルの低下が抑制される。 (4) According to the signal transmission / reception methods shown in the first and second embodiments, an electric field is hardly generated in an unselected antenna, and coupling between both antennas 11 and 12 (31, 32) occurs. This suppresses the decrease in transmission / reception level during signal transmission / reception.
　［その他の実施形態］
　・第１及び第２実施形態では、アンテナ装置１０，３０は２個のアンテナを備えるが、アンテナの個数は３個以上でもよい。この場合、使用するアンテナは順に切り替えられる。また、整合回路１１ｂ，１２ｂ，３１ｂ，３２ｂの構成は実施形態に限定されず、コイルまたは抵抗を含み得る。 [Other Embodiments]
In the first and second embodiments, the antenna devices 10 and 30 include two antennas, but the number of antennas may be three or more. In this case, the antenna to be used is switched in order. Further, the configuration of the matching circuits 11b, 12b, 31b, and 32b is not limited to the embodiment, and may include a coil or a resistor.
　上記各実施形態から把握できる技術的思想について記載する。
　（付記１）
　インピーダンスを調整する整合回路（１１ｂ，１２ｂ；３１ｂ，３２ｂ）をそれぞれ含む複数のアンテナ（１１，１２；３１，３２）と、
　前記各アンテナの前記整合回路を制御することにより前記各アンテナのインピーダンスを調整する制御回路（１５；３５）と、
　前記各アンテナが送受信する信号を処理する無線回路（１３；３３；３４）と、を備え、
　前記制御回路は、前記複数のアンテナのいずれか一つを選択し、選択したアンテナの前記整合回路を制御して前記選択したアンテナと前記無線回路との整合をとり、選択されていないアンテナの前記整合回路を制御して前記選択されていないアンテナと前記無線回路とを不整合にし、信号送信時、選択したアンテナに信号を出力するように前記無線回路を制御し、信号受信時、選択したアンテナからの信号を受信するように前記無線回路を制御する、アンテナ装置（１０；３０）。 A technical idea that can be grasped from each of the above embodiments will be described.
(Appendix 1)
A plurality of antennas (11, 12; 31, 32) each including a matching circuit (11b, 12b; 31b, 32b) for adjusting impedance;
A control circuit (15; 35) for adjusting the impedance of each antenna by controlling the matching circuit of each antenna;
A radio circuit (13; 33; 34) for processing signals transmitted and received by each antenna,
The control circuit selects any one of the plurality of antennas, controls the matching circuit of the selected antenna to match the selected antenna and the radio circuit, and selects the antennas that are not selected. The matching circuit is controlled so that the unselected antenna and the radio circuit are mismatched, and when the signal is transmitted, the radio circuit is controlled to output a signal to the selected antenna, and when the signal is received, the selected antenna is selected. An antenna device (10; 30) for controlling the radio circuit to receive a signal from the antenna circuit.
　（付記２）
　前記無線回路（１３）を前記複数のアンテナ（１１，１２）のうちのいずれか一つに接続する切替回路（１４）を更に備え、
　前記制御回路（１５）は、信号の送受信時、前記選択したアンテナと前記無線回路とを接続し、かつ前記選択されていないアンテナと前記無線回路とを接続しないように前記切替回路を制御する、付記１に記載のアンテナ装置（１０）。 (Appendix 2)
A switching circuit (14) for connecting the wireless circuit (13) to any one of the plurality of antennas (11, 12);
The control circuit (15) controls the switching circuit so as to connect the selected antenna and the radio circuit and not connect the non-selected antenna and the radio circuit at the time of signal transmission / reception, The antenna device (10) according to appendix 1.
　（付記３）
　前記無線回路（３３；３４）は、周波数の異なる信号を処理する複数の無線回路（３３，３４）のうちの一つであり、
　前記複数のアンテナ（３１，３２）の各々は前記複数の無線回路（３３，３４）のうちの一つに接続されており、前記複数のアンテナは、周波数の異なる信号を送受信するものであり、
　前記制御回路（３５）は、信号の送受信時、前記選択したアンテナに接続された前記無線回路を動作させ、前記選択されていないアンテナに接続された前記無線回路を動作させない、付記１に記載のアンテナ装置（３０）。 (Appendix 3)
The radio circuit (33; 34) is one of a plurality of radio circuits (33, 34) for processing signals having different frequencies,
Each of the plurality of antennas (31, 32) is connected to one of the plurality of radio circuits (33, 34), and the plurality of antennas transmit and receive signals having different frequencies.
The control circuit (35) operates the radio circuit connected to the selected antenna and does not operate the radio circuit connected to the non-selected antenna when transmitting and receiving signals. Antenna device (30).
　（付記４）
　複数のアンテナ（１１，１２；３１，３２）を用いて信号を送受信する信号送受信方法であって、
　前記複数のアンテナのうちいずれか一つを選択すること、
　選択したアンテナと無線回路（１３；３３；３４）とが整合するように前記選択したアンテナのインピーダンスを調整すること、
　選択されていないアンテナと前記無線回路とが整合しないように前記選択されていないアンテナのインピーダンスを調整すること、を備え、
　前記選択されていないアンテナのインピーダンスを調整することは、
　　前記選択されていないアンテナと前記無線回路とを非接続にすること、または、
　　前記選択されていないアンテナに接続された前記無線回路を動作させないこと、
を含む、信号送受信方法。 (Appendix 4)
A signal transmitting and receiving method for transmitting and receiving signals using a plurality of antennas (11, 12; 31, 32),
Selecting any one of the plurality of antennas;
Adjusting the impedance of the selected antenna to match the selected antenna and the radio circuit (13; 33; 34);
Adjusting the impedance of the unselected antenna so that the unselected antenna and the radio circuit do not match,
Adjusting the impedance of the unselected antenna is
Disconnecting the unselected antenna and the radio circuit, or
Not operate the radio circuit connected to the unselected antenna;
A method for transmitting and receiving signals.

Claims (4)

  1. 　インピーダンスを調整する整合回路をそれぞれ含む複数のアンテナと、
    　前記各アンテナの前記整合回路を制御することにより前記各アンテナのインピーダンスを調整する制御回路と、
    　前記各アンテナが送受信する信号を処理する無線回路と、を備え、
    　前記制御回路は、前記複数のアンテナのいずれか一つを選択し、選択したアンテナの前記整合回路を制御して前記選択したアンテナと前記無線回路との整合をとり、選択されていないアンテナの前記整合回路を制御して前記選択されていないアンテナと前記無線回路とを不整合にし、信号送信時、選択したアンテナに信号を出力するように前記無線回路を制御し、信号受信時、選択したアンテナからの信号を受信するように前記無線回路を制御する、アンテナ装置。     A plurality of antennas each including a matching circuit for adjusting impedance;
    A control circuit for adjusting the impedance of each antenna by controlling the matching circuit of each antenna;
    A radio circuit for processing a signal transmitted and received by each antenna,
    The control circuit selects any one of the plurality of antennas, controls the matching circuit of the selected antenna to match the selected antenna and the radio circuit, and selects the antennas that are not selected. The matching circuit is controlled so that the unselected antenna and the radio circuit are mismatched, and when the signal is transmitted, the radio circuit is controlled to output a signal to the selected antenna, and when the signal is received, the selected antenna is selected. An antenna device for controlling the radio circuit so as to receive a signal from the antenna.
  2. 　前記無線回路を前記複数のアンテナのうちのいずれか一つに接続する切替回路を更に備え、
    　前記制御回路は、信号の送受信時、前記選択したアンテナと前記無線回路とを接続し、かつ前記選択されていないアンテナと前記無線回路とを接続しないように前記切替回路を制御する、
    　請求項１に記載のアンテナ装置。     A switching circuit for connecting the radio circuit to any one of the plurality of antennas;
    The control circuit controls the switching circuit so as to connect the selected antenna and the radio circuit and not connect the non-selected antenna and the radio circuit when transmitting and receiving signals.
    The antenna device according to claim 1.
  3. 　前記無線回路は、周波数の異なる信号を処理する複数の無線回路のうちの一つであり、
    　前記複数のアンテナの各々は前記複数の無線回路のうちの一つに接続されており、前記複数のアンテナは、周波数の異なる信号を送受信するものであり、
    　前記制御回路は、信号の送受信時、前記選択したアンテナに接続された前記無線回路を動作させ、前記選択されていないアンテナに接続された前記無線回路を動作させない、請求項１に記載のアンテナ装置。     The wireless circuit is one of a plurality of wireless circuits that process signals having different frequencies,
    Each of the plurality of antennas is connected to one of the plurality of radio circuits, and the plurality of antennas transmit and receive signals having different frequencies.
    2. The antenna device according to claim 1, wherein the control circuit operates the radio circuit connected to the selected antenna and does not operate the radio circuit connected to the non-selected antenna during signal transmission / reception. .
  4. 　複数のアンテナを用いて信号を送受信する信号送受信方法であって、
    　前記複数のアンテナのうちいずれか一つを選択すること、
    　選択したアンテナと無線回路とが整合するように前記選択したアンテナのインピーダンスを調整すること、
    　選択されていないアンテナと前記無線回路とが整合しないように前記選択されていないアンテナのインピーダンスを調整すること、を備え、
    　前記選択されていないアンテナのインピーダンスを調整することは、
    　　前記選択されていないアンテナと前記無線回路とを非接続にすること、または、
    　　前記選択されていないアンテナに接続された前記無線回路を動作させないこと、
    を含む、信号送受信方法。     A signal transmitting and receiving method for transmitting and receiving signals using a plurality of antennas,
    Selecting any one of the plurality of antennas;
    Adjusting the impedance of the selected antenna so that the selected antenna and the radio circuit are matched;
    Adjusting the impedance of the unselected antenna so that the unselected antenna and the radio circuit do not match,
    Adjusting the impedance of the unselected antenna is
    Disconnecting the unselected antenna and the radio circuit, or
    Not operate the radio circuit connected to the unselected antenna;
    A method for transmitting and receiving signals.
PCT/JP2016/003448 2015-08-19 2016-07-25 Antenna apparatus, and method for transmitting and receiving signal WO2017029777A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999065108A1 (en) * 1998-06-10 1999-12-16 Matsushita Electric Industrial Co., Ltd. Radio antenna device
JP2006135531A (en) * 2004-11-04 2006-05-25 Seiko Instruments Inc Radio communication apparatus, and unit and method for controlling the same

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Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999065108A1 (en) * 1998-06-10 1999-12-16 Matsushita Electric Industrial Co., Ltd. Radio antenna device
JP2006135531A (en) * 2004-11-04 2006-05-25 Seiko Instruments Inc Radio communication apparatus, and unit and method for controlling the same

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