WO2017029777A1 - アンテナ装置及び信号送受信方法 - Google Patents

アンテナ装置及び信号送受信方法 Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
circuit
signal
antennas
radio circuit
Prior art date
Application number
PCT/JP2016/003448
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
真介 植田
笠井　秀樹
興梠　武志
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2017029777A1 publication Critical patent/WO2017029777A1/ja

Links

Images

Classifications

    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Transmitters (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Radio Transmission System (AREA)
PCT/JP2016/003448 2015-08-19 2016-07-25 アンテナ装置及び信号送受信方法 WO2017029777A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015161923A JP2017041730A (ja) 2015-08-19 2015-08-19 アンテナ装置及び信号送受信方法
JP2015-161923 2015-08-19

Publications (1)

Publication Number Publication Date
WO2017029777A1 true WO2017029777A1 (ja) 2017-02-23

Family

ID=58051641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/003448 WO2017029777A1 (ja) 2015-08-19 2016-07-25 アンテナ装置及び信号送受信方法

Country Status (3)

Country Link
JP (1) JP2017041730A (zh)
TW (1) TWI627835B (zh)
WO (1) WO2017029777A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115298963A (zh) * 2020-04-06 2022-11-04 夏普株式会社 无线装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999065108A1 (fr) * 1998-06-10 1999-12-16 Matsushita Electric Industrial Co., Ltd. Antenne radio
JP2006135531A (ja) * 2004-11-04 2006-05-25 Seiko Instruments Inc 無線通信装置及び該装置の制御装置並びに制御方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8737376B2 (en) * 2011-08-12 2014-05-27 Telefonaktiebolaget L M Ericsson (Publ) Frontend module for time division duplex (TDD) carrier aggregation
TWI511378B (zh) * 2012-04-03 2015-12-01 Ind Tech Res Inst 多頻多天線系統及其通訊裝置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999065108A1 (fr) * 1998-06-10 1999-12-16 Matsushita Electric Industrial Co., Ltd. Antenne radio
JP2006135531A (ja) * 2004-11-04 2006-05-25 Seiko Instruments Inc 無線通信装置及び該装置の制御装置並びに制御方法

Also Published As

Publication number Publication date
TW201720066A (zh) 2017-06-01
TWI627835B (zh) 2018-06-21
JP2017041730A (ja) 2017-02-23

Similar Documents

Publication Publication Date Title
US8712355B2 (en) Antenna tuning on an impedance trajectory
TWI678025B (zh) 智慧型天線及具有智慧型天線的無線通訊裝置
TWI663842B (zh) RF transceiver front-end circuit
US9905910B2 (en) Electronic device and multi-band antenna
CN102474294A (zh) 用于控制自适应调谐天线电路中的阻抗的装置
US9768991B2 (en) Multi-mode active circuit control and activation system
US10411352B2 (en) Antenna tuning system and method thereof
US8508296B1 (en) Tunable directional power combiner
WO2014083500A1 (en) Reconfigurable single and multi-sector cell site system
US10038415B2 (en) Power amplifier matching circuit with DVCs
CN105097396A (zh) 一种阻抗匹配装置及半导体加工设备
CN109842215B (zh) 多重同时充电的无线电力传送装置及无线电力接收装置
CN109728417B (zh) 天线及其控制方法和电子设备
US8630597B2 (en) Antenna tuner and method for adjusting antenna impedance
JP2016528794A (ja) ミリメートル波無線モジュールにおけるフェーズドアレイアンテナを動作させるための技法
WO2016086978A1 (en) Quadrature signal generator, beamforming arrangement, communication device and base station
WO2017029777A1 (ja) アンテナ装置及び信号送受信方法
US11569688B2 (en) Wireless charger and control method
KR20200076485A (ko) 튜너블 안테나장치 및 튜너블 안테나장치의 동작 방법
JP5569340B2 (ja) アンテナ装置
US10855256B2 (en) Near field RFID probe with tunning
US11522578B2 (en) Near-field communications circuit
US9450560B2 (en) Wireless transceiver with function of adjustment for frequency-band matching and the adjusting method therefor
CN107688131B (zh) Mimo天线系统
US9293824B2 (en) Interchangeable printed circuit board among various types of platforms by adjusting an impedance value

Legal Events

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

Ref document number: 16836775

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16836775

Country of ref document: EP

Kind code of ref document: A1