WO2001067551A1 - Antenne d'emission et de reception - Google Patents

Antenne d'emission et de reception Download PDF

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Publication number
WO2001067551A1
WO2001067551A1 PCT/JP2000/001324 JP0001324W WO0167551A1 WO 2001067551 A1 WO2001067551 A1 WO 2001067551A1 JP 0001324 W JP0001324 W JP 0001324W WO 0167551 A1 WO0167551 A1 WO 0167551A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
transmission
reception
helical antenna
bias voltage
Prior art date
Application number
PCT/JP2000/001324
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Kajikawa
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to EP00906707A priority Critical patent/EP1182729A1/fr
Priority to CN00807038A priority patent/CN1354899A/zh
Priority to JP2001566219A priority patent/JP3669331B2/ja
Priority to PCT/JP2000/001324 priority patent/WO2001067551A1/fr
Publication of WO2001067551A1 publication Critical patent/WO2001067551A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas

Definitions

  • the present invention relates to a transmission / reception shared antenna device used for a portable terminal for performing satellite communication and terrestrial communication.
  • FIG. 4 shows a conventional transmitting / receiving antenna device for a portable terminal.
  • reference numeral 1 denotes a transmission helical antenna for circularly polarized four-wire windings
  • reference numeral 2 denotes a circularly polarized four-wire winding reception helical antenna.
  • Reference numeral 3 denotes a distributor for supplying power to the ryical antenna 1 for transmission
  • reference numeral 4 denotes a transmitter including a high-output amplifier for outputting a transmission signal.
  • Reference numeral 5 denotes a combiner for combining received signals received by the receiving helical antenna 2
  • reference numeral 6 denotes a receiver including a low-noise amplifier and the like.
  • the transmission / reception operation of this conventional transmission / reception antenna device will be described.
  • the transmission signal of the transmission system is input to the distributor 3 after the unnecessary signal is removed and the high-output amplification is performed in the transmitter 4.
  • This transmission signal is divided into four signals having a phase difference of 0 °, 90 °, 180 °, and 270 ° by the delay operation in the splitter 3, and the signal is transmitted to a four-wire wound transmission. Input to antenna 1.
  • the line lengths of the feed lines from the four output terminals of the distributor 3 to the transmission helical antenna 1 are the same for each of the four lines, and the transmission helical antenna 1 has the same line length for each antenna element. Make the length the same.
  • the length of each antenna element is set to any of i / 4, 3 ⁇ , / 4, and so on.
  • a circularly polarized signal can be transmitted by the phase difference.
  • the combiner 5 in the receiving system combines the circularly polarized signals received by the four windings of the receiving helical antenna 2 with a phase difference of 0 °, 90 °, 180 °, and 270 °. are doing.
  • the antenna elements by any of the length of each antenna element of Rikaruante Na 2 to a receiving input 2/4, 3 input 2/4, ... 'is received Resonating at a frequency, a circularly polarized signal can be received by combining with the above phase difference.
  • a transmission and reception shared helical antenna having a gain in a band covering both the transmission and reception bands can be configured.
  • the transmission and reception frequencies are far apart or if you want to optimize the transmission and reception gains, two helical antennas are provided for transmission and reception, and the length of the antenna element for each helical antenna is reduced. It is necessary to set the physical dimensions to match the transmission or reception frequency.
  • Multi-mode mobile terminals have been developed.
  • the frequency of radio waves transmitted and received by mobile terminals is individually determined by the communication system.For example, in the case of a mobile terminal communicating between two communication systems, antennas corresponding to four frequencies are required to transmit and receive becomes
  • the present invention has been made in order to solve the above-described problems, and provides a transmission / reception shared antenna device for a portable terminal, which is configured by a helical antenna used in common for a plurality of radio waves having different frequencies. Things. Disclosure of the invention
  • the antenna device for shared transmission and reception includes a helical antenna shared for transmission and reception, a barak diode provided on a feed line to an antenna element of the helical antenna, and a reverse bias voltage applied to the barak diode.
  • a bias voltage switching means for switching between transmission and reception and switching a frequency band of a signal transmitted and received by the helical antenna Therefore, it is possible to change the resonance frequency of the helical antenna shared during transmission and reception, and to improve the frequency characteristics of the antenna during transmission and reception.
  • the power source side is provided on the antenna element side of the helical antenna, and the bias voltage switching means supplies a reverse bias voltage via a resistor provided on the cathode side of the black diode. It may be something. According to this configuration, by interposing a resistor between the power supply line and the voltage input terminal, the impedance on the voltage input terminal side can be increased, and the loss of the transmission / reception signal propagating through the power supply line can be reduced. .
  • the barak diode has a power source side provided on the antenna element side of the helical antenna, and the bias voltage switching means supplies a reverse bias voltage via a coil provided on the cathode side of the barac diode. May be used.
  • the coil is interposed between the power supply line and the voltage input terminal, so that the voltage input terminal side and the helical amplifier are connected.
  • the antenna can be matched, and the loss of the transmitted / received signal propagating through the feed line can be reduced.
  • the transmission / reception shared antenna device generates a 4-wire wound helical antenna shared for transmission / reception of a circularly polarized signal and a signal divided into four from the transmission signal, and the signal is divided into four by the first delay line.
  • a divider / combiner for generating a phase difference in a signal and combining a received signal from the helical antenna via the second delay line; a varactor diode provided between the helical antenna and the divider / combiner; Bias voltage switching means for switching the reverse bias voltage applied to the diode between transmission and reception, and for switching the frequency band of signals transmitted and received by the helical antenna. Therefore, also for a helical antenna used for transmission and reception of a circularly polarized signal, the resonance frequency at the time of transmission and at the time of reception can be changed, and the frequency characteristics of the antenna at the time of transmission and reception can be improved.
  • the transmission / reception shared antenna device generates a 4-wire wound helical antenna shared for transmission / reception of a circularly polarized signal, and a signal divided into four from a transmission signal, and divided into four signals by a delay line.
  • Four dispersing / combining devices that generate a phase difference and combine received signals from the helical antenna via delay lines, and four dispersing / combining devices provided for each antenna element of the helical antenna.
  • a diode and bias voltage switching means for switching the reverse bias voltage applied to the four barak diodes during transmission and reception, and switching the frequency band of a signal transmitted and received by a helical antenna.
  • the reverse bias voltage applied at the time of transmission or reception by means differs depending on the antenna element.
  • the antenna apparatus for shared transmission and reception includes: a helical antenna shared for transmission and reception; a barak diode provided between a feed line to an antenna element of the helical antenna and a ground point; Bias voltage switching means for switching the reverse bias voltage applied to the node between transmission and reception, and switching the frequency band of signals transmitted and received by the helicopter antenna. Therefore, it is possible to change the resonance frequency of the antenna during transmission and reception by matching between the parachute diode and the helical antenna, thereby improving the frequency characteristics of the antenna during transmission and reception. be able to.
  • FIG. 1 is a block diagram showing the configuration of a transmitting / receiving antenna apparatus according to the present invention (Embodiment 1).
  • FIG. 2 is a block diagram showing the configuration of a shared antenna for transmission and reception according to the present invention (Embodiment 2).
  • FIG. 3 is a block diagram showing the configuration of a shared antenna for transmission and reception according to the present invention (Embodiment 3).
  • FIG. 4 is a block diagram showing a configuration of a conventional antenna device. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a block diagram showing a configuration of a shared antenna for transmission and reception according to Embodiment 1 of the present invention.
  • Reference numeral 7 denotes a helical antenna shared for transmission and reception
  • reference numeral 8 denotes a barak diode provided on a feed line to the helical antenna 7.
  • the balak diode 8 is provided for each antenna element of the helical antenna 7, and is connected in series with the antenna element side as a force source.
  • 9 is the first voltage input terminal
  • 10 is the second voltage input terminal
  • a switch 11 switches between the voltage input terminal 9 and the voltage input terminal 10.
  • Reference numeral 12 denotes a resistor connected to the cathode side of the diode 8, and the other end of this resistor is connected to the switch 11.
  • Reference numeral 14 denotes a distributor / synthesizer that feeds the helical antenna 7
  • 15 denotes a circuit
  • 15 denotes a transmitter composed of a high-output amplifier
  • 17 denotes a receiver composed of a low-noise amplifier.
  • the transmission signal is subjected to unnecessary signal removal and high-output amplification in the transmitter 16 and is input to the distribution / combiner 14 via the circuit 15.
  • the transmission signal is prevented from sneaking into the receiver 17 by the first time.
  • the transmission signal is distributed to the required number of feed signals in accordance with the number of antenna elements of the helical antenna 7 by the splitter / combiner 14 and fed to the helical antenna 7 via the feed line. In the case of Fig. 1, there are four distributions.
  • the signals received from the helical antenna 7 are combined by the distributor / synthesizer 14 and input to the receiver 17 via the circuit unit 15 to perform low-noise amplification and the like, and to a signal processing unit (not shown). Is entered.
  • the received signal is prevented from sneaking into the transmitter 16 due to the circuit cycling 15.
  • the transmission signal distributed by the distributor / combiner 14 is supplied to each antenna element of the helical antenna 7 via the diode 8.
  • the reverse bias voltage from the voltage input terminal 9 or the voltage input terminal 10 is applied between the anode of the diode 8 and the power source via the switch 11.
  • the capacitor capacitance of the diode 8 changes according to the value of the reverse bias voltage. Since the resonance frequency of the helical antenna 7 is determined by the capacitance of the diode 8 and the electrical length of each antenna element of the helical antenna 7, the resonance frequency changes as the capacitance of the capacitor changes as described above. .
  • Voltage input terminal 9 and voltage input terminal 1 By changing the applied voltages from 0 to be different from each other and switching them by the switch 11, an antenna that resonates at different frequencies in transmission and reception can be configured.
  • a reverse bias voltage is applied from the voltage input terminal 9 to the balak diode 8 via the switch 11, and at the time of the reception gate, the reverse input voltage is applied from the voltage input terminal 10 via the switch 11.
  • Switch 11 is applied to apply a reverse bias voltage to node 8.
  • the resonance frequency received by this antenna is obtained by the reverse bias voltage from the voltage input terminal 10 applied between the anode and cathode of the Barakage diode 8. Is determined.
  • the received signal received by the helical antenna 7 is synthesized by the distributor / synthesizer 14 and then input to the receiver 17 via the receiver 15.
  • the resistor 12 is provided to supply a reverse bias voltage to the diode 8, and to sufficiently increase the impedance with respect to the impedance of the transmission line to reduce signal loss.
  • the resistor 13 grounds the anode side to generate a potential difference between the anode of the diode 8 and the cathode, and makes the impedance sufficiently high with respect to the impedance of the transmission line. This is provided to reduce signal loss.
  • resistors 12 and 13 are used in the voltage supply circuit for applying the reverse bias voltage to the bar diode 8.However, these resistors are replaced by coils. Is also good. By using the coil in this manner, matching can be achieved between the voltage supply circuit and the anode ground circuit provided for bias application and each of the helical antenna elements, and the antenna radiation efficiency can be increased.
  • the voltage supply circuit referred to here is a circuit composed of the voltage input terminal 9, voltage input terminal 10, switch 11 and resistor 12 in FIG. 1, and the anode ground circuit is the resistor 13 Yo Circuit.
  • FIG. 1 exemplifies a case where the helical antenna 7 has a four-wire winding. Even if the helical antenna 7 is a two-wire helical antenna, this embodiment is similarly configured by the above-described circuit. be able to. When a two-wire wound helical antenna is used, the number of balak diodes 8 connected to each antenna element can be reduced by reducing the number of antenna elements, and the antenna device can be downsized. can do.
  • Embodiment 2 Embodiment 2
  • FIG. 2 is a block diagram showing a configuration of a shared antenna for transmission and reception according to Embodiment 2 of the present invention.
  • reference numeral 18 denotes a divider / synthesizer having a delay circuit therein.
  • a delay circuit which produces a phase difference of 0 °, 90 °, 180 °, and 270 ° is used. It is provided.
  • circuits denoted by the same reference numerals as those in FIG. 1 indicate the same or corresponding parts of the circuit shown in FIG. 1 in the first embodiment.
  • the transmission signal supplied to the helical antenna 7 is divided into four in the distribution / synthesizer 18 in order to form a circularly polarized wave. This is the point at which a phase difference of 0 °, 180 °, and 270 ° is given. Also, it is characterized in that the received signals are combined in the distribution combiner 18 via a delay circuit having a phase difference.
  • a circuit that gives such a phase difference is provided, for example, if a delay circuit in the distributing / synthesizing unit 18 is provided according to the frequency at the time of transmission, the frequency will differ at the time of reception.
  • the phases of the signals combined with the signal do not match, and a phase error occurs in the received signal.
  • a distribution combiner 18 is required in order to reduce a phase error in transmission and reception on a delay circuit.
  • a delay line for transmitting a transmission signal and a delay line for transmitting a reception signal may be provided separately. With such a configuration, the delay circuit in the distributor / synthesizer 18 becomes large, but the problem of the phase error is solved.
  • the delay circuit in the distributor / synthesizer 18 is shared for transmission and reception, and one of the transmission and reception signals, for example, a delay line having a phase difference of 0 °, 90 °, 180 °, and 270 ° after distribution with respect to the transmission signal. It consists of. Therefore, if the received signals are combined using this delay line, the phases of the transmitted and received signals will not be uniform because the transmitted and received signals have different frequencies.
  • the reverse bias voltages applied to the four balak diodes 8 corresponding to each antenna element of the helical antenna 7 are set to different values, and Use different capacitor values for Diode 8 capacitors.
  • the delay circuit is provided so that the four phase differences are 0 °, 90 °, 180 °, and 270 ° during transmission, so the reverse bias voltage during transmission, for example, the power input terminal 9 The value is set to the same value in four Barak's Diode 8.
  • the values of the four power input terminals 10 applied to the four barcode diodes 8 are set to different values.
  • the resonance frequency is slightly shifted.
  • the deviation of the resonance frequency is reduced as compared with the case where a transmission signal and a reception signal of different frequencies are transmitted and received without changing the capacitance of the diode 8.
  • FIG. 3 is a block diagram showing a configuration of a shared antenna for transmission and reception according to Embodiment 3 of the present invention.
  • reference numeral 19 denotes a capacitive element connected in series to a feed line to the helical antenna 7.
  • Reference numeral 20 denotes a Barak diode connected between the feeder line and the ground point on the helical antenna 7 side of the capacitive element 19.
  • circuits denoted by the same reference numerals as those in FIG. 1 indicate the same or corresponding parts of the circuit shown in FIG. 1 in the first embodiment.
  • a reverse bias voltage from the voltage input terminal 9 and the voltage input terminal 10 is applied between the power source of the diode 20 and the anode via the switch 11. Due to this reverse bias voltage, the capacitance of the diode 20 changes, and the matching between the capacitance and each antenna element of the helical antenna 7 changes the resonance frequency of the antenna and changes the transmission frequency or reception frequency. Can be done.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne une antenne d'émission et de réception utilisable avec un dispositif terminal portatif destinée à des communications par satellite ou de surface. Des diodes varactors sont placées sur des coaxiaux des éléments d'une antenne hélicoïdale. On peut modifier la longueur électrique de l'antenne en modifiant la tension de polarisation appliquée à ces diodes en fonction de son utilisation en émission ou en réception. Ainsi, l'antenne d'émission et de réception peut être accordée pour des fréquences aussi bien d'émission que de réception.
PCT/JP2000/001324 2000-03-06 2000-03-06 Antenne d'emission et de reception WO2001067551A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00906707A EP1182729A1 (fr) 2000-03-06 2000-03-06 Antenne d'emission et de reception
CN00807038A CN1354899A (zh) 2000-03-06 2000-03-06 收发共用的天线装置
JP2001566219A JP3669331B2 (ja) 2000-03-06 2000-03-06 送受信共用アンテナ装置
PCT/JP2000/001324 WO2001067551A1 (fr) 2000-03-06 2000-03-06 Antenne d'emission et de reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/001324 WO2001067551A1 (fr) 2000-03-06 2000-03-06 Antenne d'emission et de reception

Publications (1)

Publication Number Publication Date
WO2001067551A1 true WO2001067551A1 (fr) 2001-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/001324 WO2001067551A1 (fr) 2000-03-06 2000-03-06 Antenne d'emission et de reception

Country Status (4)

Country Link
EP (1) EP1182729A1 (fr)
JP (1) JP3669331B2 (fr)
CN (1) CN1354899A (fr)
WO (1) WO2001067551A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4977438B2 (ja) 2006-10-25 2012-07-18 日本電気株式会社 通信装置及びそれを用いた携帯通信端末
JP5018946B2 (ja) * 2009-10-13 2012-09-05 ソニー株式会社 アンテナ
EP2940866B1 (fr) 2014-04-30 2021-12-08 Nxp B.V. Circuit de commutation RF
CN104660751B (zh) * 2015-02-26 2017-08-08 惠州Tcl移动通信有限公司 一种基于移动终端的天线开关控制方法及系统
CN110109082A (zh) * 2019-04-17 2019-08-09 天津大学 一种共天线的太赫兹主动雷达成像阵列

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189638U (ja) * 1982-06-09 1983-12-16 パイオニア株式会社 ヘリカルフルロ−デイングホイツプアンテナ
JPH0539016U (ja) * 1991-10-17 1993-05-25 アルプス電気株式会社 ヘリカルアンテナ
JPH06268564A (ja) * 1993-03-15 1994-09-22 Hitachi Ltd 携帯型無線電話端末装置
EP0877442A2 (fr) * 1997-05-08 1998-11-11 Nec Corporation Antenne hélicoidale

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189638U (ja) * 1982-06-09 1983-12-16 パイオニア株式会社 ヘリカルフルロ−デイングホイツプアンテナ
JPH0539016U (ja) * 1991-10-17 1993-05-25 アルプス電気株式会社 ヘリカルアンテナ
JPH06268564A (ja) * 1993-03-15 1994-09-22 Hitachi Ltd 携帯型無線電話端末装置
EP0877442A2 (fr) * 1997-05-08 1998-11-11 Nec Corporation Antenne hélicoidale

Also Published As

Publication number Publication date
CN1354899A (zh) 2002-06-19
JP3669331B2 (ja) 2005-07-06
EP1182729A1 (fr) 2002-02-27

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