WO2015135104A1 - Circuit d'adaptation d'impédance et émetteur - Google Patents

Circuit d'adaptation d'impédance et émetteur Download PDF

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Publication number
WO2015135104A1
WO2015135104A1 PCT/CN2014/073113 CN2014073113W WO2015135104A1 WO 2015135104 A1 WO2015135104 A1 WO 2015135104A1 CN 2014073113 W CN2014073113 W CN 2014073113W WO 2015135104 A1 WO2015135104 A1 WO 2015135104A1
Authority
WO
WIPO (PCT)
Prior art keywords
impedance
unit
matching circuit
impedance matching
adjustable
Prior art date
Application number
PCT/CN2014/073113
Other languages
English (en)
Chinese (zh)
Inventor
王彦辉
张希坤
王强
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201480062467.7A priority Critical patent/CN105723622B/zh
Priority to PCT/CN2014/073113 priority patent/WO2015135104A1/fr
Publication of WO2015135104A1 publication Critical patent/WO2015135104A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an impedance matching circuit and a transmitter. Background technique
  • the power amplifier circuit is an important component of the transmitter in the communication system.
  • the power amplifying circuit 100 mainly includes an input matching unit 1001, a power amplifier 1002, and an output matching unit 1003.
  • the power amplifying circuit 100 in practical applications, in order to ensure normal operation of the device, the power amplifying circuit 100 must be connected to the load 102 through the isolation filtering unit 101, and the operating frequency band of the isolation filtering unit 101 and the operating band of the power amplifying circuit 100 are the same.
  • the performance of the power amplifier 1002 in the power amplifying circuit 100 is easily affected by the impedance of the circuit device connected to its back end, that is, it is easily affected by the output matching unit 1003, the isolation filtering unit 101, and FIG.
  • the effect of the impedance exhibited by the load 102 The output matching unit 1003 and the load 102 exhibit a fixed impedance regardless of the operating frequency band or the harmonic frequency band of the power amplifying circuit 100; and the isolation filtering unit 101 is turned on in the operating frequency band, and the impedance presented in the harmonic frequency band is not determined, so the isolation is performed.
  • the drastic change in impedance of the filtering unit 101 inevitably affects the performance of the power amplifier 1002 at the front end, which in turn affects the performance of the entire power amplifying circuit 100. Summary of the invention
  • Embodiments of the present invention provide an impedance matching circuit and a transmitter for improving performance of a power amplifying circuit.
  • an impedance matching circuit including an isolation filtering unit and an adjustable impedance unit, wherein:
  • One end of the isolation filtering unit is connected to one end of the adjustable impedance unit, and the connected connection end serves as an input end of the impedance matching circuit, and is connected to the power amplifying circuit; the other end of the isolation filtering unit serves as an output of the impedance matching circuit. End, connect the load; The other end of the adjustable impedance unit is grounded;
  • the isolation filtering unit is turned on in an operating frequency band of the power amplifying circuit; the impedance of the adjustable impedance unit in the operating band of the power amplifying circuit is infinite, and the impedance in the harmonic band is a specified impedance.
  • the specified impedance is less than an impedance of the load.
  • the adjustable impedance unit specifically includes a tandem sub-unit and an impedance sub-unit
  • the strobe subunit is turned off in the operating band of the power amplifying circuit and is turned on in the harmonic frequency band; the impedance of the impedance subunit is the specified impedance.
  • the strobing subunit is specifically a filter.
  • the filter is specifically a high-pass filter.
  • the filter is specifically a band pass filter.
  • the isolation filtering unit is specifically a filter and/or an isolator.
  • a transmitter including any of the impedance matching circuits described above.
  • the impedance matching circuit connected to the back end of the power amplifying circuit includes an isolation filtering unit and an adjustable impedance unit, and the isolation filtering unit is in the working frequency band of the power amplifying circuit.
  • the impedance of the adjustable impedance unit is infinite, and the adjustable impedance unit is equivalent to an open circuit.
  • the impedance of the circuit device connected to the rear end of the power amplifier circuit is the impedance of the load; in the harmonic frequency band, the impedance of the isolation filter unit is not It is determined that the impedance of the adjustable impedance unit is a specified impedance.
  • the impedance of the circuit device connected to the back end of the power amplifier circuit is the impedance generated by the isolation filter unit in series with the load and then connected in parallel with the adjustable impedance unit, through the adjustable impedance.
  • the specified impedance of the unit can reduce the variation range of the impedance of the circuit device connected to the rear end of the power amplifying circuit, that is, reduce the variation range of the impedance of the circuit device connected to the rear end of the power amplifier in the power amplifying circuit, thereby reducing the power amplifier The effect of the power amplifier circuit is improved.
  • FIG. 1 is a schematic diagram of a power amplifying circuit in the prior art
  • FIG. 2 is a schematic diagram of an impedance matching circuit according to Embodiment 1 of the present invention.
  • FIG. 3 is a second schematic diagram of an impedance matching circuit according to Embodiment 1 of the present invention. detailed description
  • an embodiment of the present invention provides an impedance matching circuit and a transmitter.
  • a preferred embodiment of the present invention will be described with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein.
  • the examples are only intended to illustrate and explain the present invention and are not intended to limit the invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
  • Embodiment 1 of the present invention provides an impedance matching circuit, as shown in FIG. 2, including an isolation filter unit 2011 and an adjustable impedance unit 2012, where:
  • isolation filtering unit 2011 is connected to one end of the adjustable impedance unit 2012, and the connected terminal is connected as the input end of the impedance matching circuit 201 to the power amplifying circuit 100; the other end of the isolation filtering unit 2011 serves as the output of the impedance matching circuit 201. End, connected to the load 102;
  • the other end of the adjustable impedance unit 2012 is grounded;
  • the isolation filtering unit 2011 is turned on in the operating band of the power amplifying circuit 100; the impedance of the adjustable impedance unit 2012 in the operating band of the power amplifying circuit 100 is infinite, and the impedance in the harmonic band is a specified impedance. That is, in the operating frequency band of the power amplifying circuit 100, the impedance of the adjustable impedance unit 2012 in the impedance matching circuit 201 is infinite, which is equivalent to an open circuit. In the harmonic frequency band, the impedance of the adjustable impedance unit 2012 is a specified impedance, and the power amplifying circuit can be reduced.
  • the range of variation of the impedance of the circuit device connected to the back end of 100 is that the variation range of the impedance of the circuit device connected to the rear end of the power amplifier 1002 in the power amplifying circuit 100 is reduced.
  • the specified impedance of the adjustable impedance unit 2012 in the harmonic band is smaller than the impedance of the load 102, and the variation range of the impedance of the circuit device connected to the rear end of the power amplifier 1002 can be further ensured.
  • the isolation filtering unit 2011 in the impedance matching circuit 201 may specifically be a filter, an isolator, or an isolator and a filter.
  • the adjustable impedance unit 2012 in the impedance matching circuit 201 can also be embodied in various ways.
  • the adjustable impedance unit 2012 can be as shown in FIG. 3, including the tandem sub-unit 001 and the impedance sub-unit 002, and the two of the strobe sub-unit 001 and the impedance sub-unit 002 are connected in series.
  • the end serves as the two ends of the adjustable impedance unit 2012, and one end is connected to the isolation filtering unit 2011, and the other end is grounded.
  • the strobe subunit 001 is turned off in the operating band of the power amplifying circuit 100 and turned on in the harmonic band; the impedance of the impedance subunit 002 is the specified impedance.
  • the strobe subunit 001 is turned off, that is, the impedance of the tunable impedance unit 2012 in the operating band is infinite; in the harmonic band, the strobe subunit 001 is turned on, and the impedance subunit 002
  • the impedance is the specified impedance, ie the impedance of the tunable impedance unit 2012 in the harmonic band is specified.
  • the strobe subunit 001 may specifically be a filter, such as a high pass filter or a band pass filter; the impedance subunit 002 may specifically be a resistor, and preferably, the impedance subunit 002 may be a variable resistor. , so that the impedance subunit 002 impedance can be adjusted in the field requirements in practical applications.
  • adjustable impedance unit 2012 is only an example and is not intended to limit the present invention.
  • Other impedances in the operating band of the power amplifier circuit are infinite, impedance in the harmonic band
  • a specific implementation of the adjustable impedance unit 2012 in the impedance matching circuit 201 provided in Embodiment 1 of the present invention can be used as any device, circuit or device for specifying the impedance.
  • the impedance matching circuit provided by Embodiment 1 of the present invention improves the performance of the power amplifier by limiting the variation range of the impedance of the circuit device connected to the rear end of the power amplifying circuit, thereby improving the performance of the power amplifying circuit.
  • Embodiment 2 of the present invention also provides a transmitter including the impedance matching circuit shown in Fig. 2 or Fig. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

La présente invention se rapporte à un circuit d'adaptation d'impédance et à un émetteur pouvant améliorer la performance d'un circuit d'amplification de puissance. Le circuit d'adaptation d'impédance comprend une unité de filtrage d'isolement et une unité à impédance réglable. Une extrémité de l'unité de filtrage d'isolement et une extrémité de l'unité à impédance réglable sont reliées. Après la connexion, l'extrémité de connexion est considérée comme une entrée du circuit d'adaptation d'impédance et elle est connectée à un circuit d'amplification de puissance. L'autre extrémité de l'unité de filtrage d'isolement est considérée comme une sortie du circuit d'adaptation d'impédance et elle est connectée à une charge. L'autre extrémité de l'unité à impédance réglable est reliée à la terre. L'unité de filtrage d'isolement est pilotée à une bande de fréquences opérationnelles du circuit d'amplification de puissance. L'unité à impédance ajustable a une impédance infinie dans la bande de fréquences opérationnelles du circuit d'amplification de puissance et une impédance désignée dans la bande de fréquences harmoniques. FIG 2 :
PCT/CN2014/073113 2014-03-10 2014-03-10 Circuit d'adaptation d'impédance et émetteur WO2015135104A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480062467.7A CN105723622B (zh) 2014-03-10 2014-03-10 一种阻抗匹配电路及发射机
PCT/CN2014/073113 WO2015135104A1 (fr) 2014-03-10 2014-03-10 Circuit d'adaptation d'impédance et émetteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/073113 WO2015135104A1 (fr) 2014-03-10 2014-03-10 Circuit d'adaptation d'impédance et émetteur

Publications (1)

Publication Number Publication Date
WO2015135104A1 true WO2015135104A1 (fr) 2015-09-17

Family

ID=54070749

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/073113 WO2015135104A1 (fr) 2014-03-10 2014-03-10 Circuit d'adaptation d'impédance et émetteur

Country Status (2)

Country Link
CN (1) CN105723622B (fr)
WO (1) WO2015135104A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107493074A (zh) * 2016-06-12 2017-12-19 中兴通讯股份有限公司 Doherty功放电路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103155431A (zh) * 2010-08-26 2013-06-12 维斯普瑞公司 可调无线电前端及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7459899B2 (en) * 2005-11-21 2008-12-02 Thermo Fisher Scientific Inc. Inductively-coupled RF power source
WO2012114983A1 (fr) * 2011-02-23 2012-08-30 株式会社村田製作所 Circuit de conversion d'impédance et appareil formant terminal de transmission
CN103094683B (zh) * 2013-01-29 2016-03-30 郑州联睿电子科技有限公司 一种带有陷波特性的超宽带天线

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103155431A (zh) * 2010-08-26 2013-06-12 维斯普瑞公司 可调无线电前端及方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107493074A (zh) * 2016-06-12 2017-12-19 中兴通讯股份有限公司 Doherty功放电路

Also Published As

Publication number Publication date
CN105723622B (zh) 2017-12-15
CN105723622A (zh) 2016-06-29

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