WO2018040178A1 - 射频电路及具有该射频电路的无线通信装置 - Google Patents

射频电路及具有该射频电路的无线通信装置 Download PDF

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WO2018040178A1
WO2018040178A1 PCT/CN2016/100690 CN2016100690W WO2018040178A1 WO 2018040178 A1 WO2018040178 A1 WO 2018040178A1 CN 2016100690 W CN2016100690 W CN 2016100690W WO 2018040178 A1 WO2018040178 A1 WO 2018040178A1
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radio frequency
unit
inductor
capacitor
series
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PCT/CN2016/100690
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French (fr)
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信哲鑫
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2018040178A1 publication Critical patent/WO2018040178A1/zh

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    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

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  • the present invention relates to the field of communications technologies, and in particular, to a radio frequency circuit and a wireless communication device having the same.
  • impedance matching networks are commonly used to impedance match active devices, such as power amplifiers, to achieve a specified impedance on a Smith chart (shown in Figure 2).
  • the performance in turn, enables the RF performance of the mobile terminal using the active device to reach the 3GPP (Generation Partnership Project) protocol indicator.
  • 3GPP Generic Generation Partnership Project
  • the components of the impedance matching network include capacitors, inductors, and resistors.
  • the anti-matching of the two components is generally referred to as an L-type matching network.
  • the impedance matching of the three components generally includes: a ⁇ -type or a T-type matching network.
  • the values of capacitance, inductance, and resistance are usually not continuously distributed but discretely distributed.
  • the inductance value of the inductor generally includes: 0.6nH, 0.9nH, 1nH, 1.2nH, 1.3nH, 1.5nH, 1.8nH, 2nH, 2.2nH, 2.4nH, 2.7nH, 2.9nH, 3nH, 3.3nH... 18nH, 27nH, 33nH...
  • radio frequency circuit capable of improving radio frequency performance, which can replace the original capacitor by two or more capacitors, inductors and resistors connected in parallel or in series, and is available for the user to select for the radio frequency module.
  • the range of impedance matched component values is expanded to allow the user to select component values that are closer to the actual required component values to improve RF performance.
  • a radio frequency circuit comprising:
  • An impedance matching circuit connected to the RF module, the impedance matching circuit comprising a capacitor unit and a combination of at least one or more of the inductance units, wherein the capacitor unit and the inductor unit in the combination are connected in parallel or in series, the capacitor unit Included are at least two capacitors connected in parallel or in series, the inductor unit comprising at least two inductors connected in parallel or in series.
  • the radio frequency module includes a duplexer, and the duplexer includes a common end, a transmitting end, and a receiving end.
  • the common end is connected to the first resistor through the impedance matching circuit, and is grounded.
  • the two resistors are grounded, and the receiving end is grounded via a third resistor.
  • the capacitor unit includes a first capacitor and a second capacitor connected in parallel or in series, the capacitor unit being connected in series between the first resistor and the common terminal.
  • the inductor unit includes a first inductor and a second inductor connected in parallel or in series, and the inductor unit is connected at one end to the capacitor unit and the common terminal, and the other end is grounded.
  • the impedance matching circuit further includes a third inductor, one end of the third inductor being connected between the capacitor unit and the first resistor, and the other end being grounded.
  • the radio frequency module includes a radio frequency transceiver, and at least one port of the radio frequency transceiver is coupled to the impedance matching circuit.
  • the impedance matching circuit further includes a resistor unit, wherein the impedance matching circuit is a combination of the capacitor unit, the inductor unit, and the resistor unit, the resistor unit includes at least two parallel Or a resistor in series.
  • one or more capacitors, inductors and resistors of the capacitor unit, the inductor unit and the resistor unit are used for coarse matching of the RF module, and the remaining capacitors, inductors and resistors are used for The RF module performs fine-tuning matching.
  • a wireless communication device includes a controller and a radio frequency circuit connected to the controller, the radio frequency circuit described above.
  • the impedance matching circuit of the present invention replaces the original capacitor by two or more capacitors, inductors and resistors connected in parallel or in series, and the user can select the component value for impedance matching of the RF module.
  • the range is expanded to allow the user to select component values that are closer to the actual required component values to improve RF performance.
  • FIG. 1 is a circuit diagram of a radio frequency circuit in accordance with a preferred embodiment of the present invention.
  • FIG. 2 is a smith circle diagram of impedance matching of a power amplifier in the prior art.
  • the radio frequency circuit 100 includes a radio frequency module 10 and an impedance matching circuit 30 connected to the radio frequency module 10.
  • the impedance matching circuit 30 is configured to impedance-match the RF module 10 to a specified impedance.
  • the radio frequency circuit 100 can be used in a wireless communication device such as a mobile phone, and is connected to a controller (not shown) provided therein for signal transceiving.
  • the radio frequency module 10 includes a duplexer 11.
  • the duplexer 11 includes a common terminal 111, a transmitting end 113, and a receiving end 115.
  • the common terminal 111 is connected to the first resistor R1 via the impedance matching circuit 30 and grounded.
  • the transmitting end 113 is grounded via the second resistor R2.
  • the receiving end 115 is grounded via a third resistor R3.
  • the impedance matching circuit 30 includes a combination of at least one or more of the capacitance unit 31 and the inductance unit 32.
  • the capacitor unit and the inductor unit in the combination are connected in parallel or in series, and the capacitor unit 31 includes at least two capacitors connected in parallel or in series.
  • the inductive unit 32 includes at least two inductors connected in parallel or in series.
  • the parallel first capacitor C1 and the second capacitor C2 are connected in series between the first resistor R1 and the common terminal 111.
  • the impedance matching circuit 30 further includes a third inductor L3, one end of which is connected between the capacitor unit 31 and the first resistor R1, and the other end is grounded.
  • the capacitor unit 31 and the inductor unit 32 connect two or more capacitors (the first capacitor C1 and the second capacitor C2) and the inductor (the first inductor L1 and the second inductor L2) in parallel or in series to replace one capacitor C0.
  • the inductor L0 expands the range of component values that the user can select to impedance match the RF module 10, allowing the user to select component values that are closer to the component values actually needed. For example, if the inductance of the inductor that can be selected by the user for impedance matching of the duplexer 11 is only 1 nH and 0.6 nH, the inductance value of 1.6 nH available for the user can be added after the series connection, and the A new increase of 0.375nH is added after paralleling. It is easier for the user to select a component value that is closer to the component value actually needed, thereby obtaining a better matching effect.
  • the impedance matching circuit 30 of the present invention can also perform one or more capacitive or inductive components for coarse adjustment by replacing one or more capacitive or inductive component components by one capacitor or inductance component, and the other one or more Capacitance or inductance components are fine-tuned.
  • the inductance value of the first inductor L1 is about 27 nH
  • the duplexer 11 can obtain a better matching effect
  • the impedance value is finely adjusted by the second inductor L2 in series with the first inductor L1, so that duplexing
  • the device 11 can achieve a better matching effect.
  • this embodiment is for illustrative purposes only and is not limited by the scope of the patent application.
  • the impedance matching circuit 30 further includes a resistor unit (not shown), and the impedance matching circuit 30 is a combination of the capacitor unit, the inductor unit, and at least one or more of the resistor units.
  • the resistor unit includes at least two resistors connected in parallel or in series instead of one resistor.
  • the radio frequency module 10 includes a radio frequency transceiver.
  • the impedance matching circuit 30 is connected to a port of the radio frequency transceiver, and the RF module 10 is impedance matched to achieve a specified impedance. This port is the port close to the impedance matching circuit 30.
  • the RF module 10 can be a filter, a power amplifier, an antenna, or the like that requires other RF components for impedance matching.
  • the impedance matching circuit 30 of the present invention replaces the original capacitance, inductance and resistance by two or more capacitors, inductors and resistors connected in parallel or in series, and the user can select the component values for impedance matching of the RF module 10.
  • the range is expanded to allow the user to select component values that are closer to the actual required component values to improve RF performance.

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

Abstract

本发明公开一种射频电路及具有该射频电路的无线通信装置，该射频电路包括：射频模块；以及与该射频模块相连的阻抗匹配电路，该阻抗匹配电路包括电容单元以及电感单元至少一个或者多个的组合，其中，该组合中的电容单元和电感单元通过并联或者串联的方式相连，该电容单元包括至少两个并联或者串联的电容，该电感单元包括至少两个并联或者串联的电感。

Description

射频电路及具有该射频电路的无线通信装置
本申请要求于2016年8月31日提交中国专利局，申请号为201610775090.0、发明名称为“射频电路及具有该射频电路的无线通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体涉及一种射频电路及具有该射频电路的无线通信装置。
背景技术
目前在射频电路中，通常使用阻抗匹配网络对有源器件，例如，功率放大器进行阻抗匹配，使其在史密斯（smith）圆图（如图2所示）上达到指定的阻抗，获得较佳的性能，进而使得使用该有源器件的移动终端的射频性能指标达到3GPP（第三代合作伙伴计划，Generation Partnership Project）协议指标。
阻抗匹配网络的元件包括电容、电感、电阻，其中，两个元件构成的抗匹配一般称为L型匹配网络，三个元件构成的阻抗匹配一般有：π型或者T型匹配网络。在实际使用情况下，电容、电感、电阻的值通常不是连续分布而是离散分布的。比如，电感的电感值有一般包括：0.6nH、0.9nH、1nH、1.2nH、1.3nH、1.5nH、1.8nH、2nH、2.2nH、2.4nH、2.7nH、2.9nH、3nH、3.3nH……18nH、27nH、33nH……。
从技术角度讲，由于生产成本及制作工艺的限制因素，阻抗匹配网络的元件的元件值离散分布值偏大时，元件值之间的分布间距越大，元件值较小时，可能没有对应值（如没有小于0.6nH电感）。因此，用户在选择匹配元件进行匹配时，如果无法选取到所需准确的元件值对应的元件时，则只能选择相近的元件值。另外，从商业角度讲，有些值的元件的值可能被其他厂商垄断，用户也只能选择相近的元件值，当选择偏差过大，则会严重影响移动终端的射频性能。
发明内容
鉴于以上内容，有必要提供一种可提高射频性能的射频电路，其可以通过并联或者串联的两个或者多个电容、电感及电阻代替原有电容，将可供用户选择用来对射频模块进行阻抗匹配的元件值的范围进行扩大，使得用户可选择到与实际所需要的元件值更加接近的元件值，以提高射频性能。
一种射频电路，该射频电路包括：
射频模块；以及
与该射频模块相连的阻抗匹配电路，该阻抗匹配电路包括电容单元以及电感单元至少一个或者多个的组合，其中，该组合中的电容单元和电感单元通过并联或者串联的方式相连，该电容单元包括至少两个并联或者串联的电容，该电感单元包括至少两个并联或者串联的电感。
根据本发明一优选实施例，该射频模块包括双工器，双工器包括公共端、发射端及接收端，该公共端经该阻抗匹配电路与第一电阻相连后接地，该发射端经第二电阻接地，该接收端经第三电阻接地。
根据本发明一优选实施例，该电容单元包括并联或者串联的第一电容及第二电容，该电容单元串联至该第一电阻与该公共端之间。
根据本发明一优选实施例，该电感单元包括并联或者串联的第一电感及第二电感，该电感单元一端连接至该电容单元与该公共端之间，另一端接地。
根据本发明一优选实施例，该阻抗匹配电路还包括第三电感，该第三电感的一端连接至该电容单元与该第一电阻之间，另一端接地。
根据本发明一优选实施例，该射频模块包括射频收发器，该射频收发器的至少一个端口与该阻抗匹配电路相连。
根据本发明一优选实施例，该阻抗匹配电路还包括电阻单元，该阻抗匹配电路为该电容单元、该电感单元及该电阻单元中至少一个或者多个的组合，该电阻单元包括至少两个并联或者串联的电阻。
根据本发明一优选实施例，该电容单元、该电感单元及该电阻单元中的一个或者多个电容、电感及电阻用于对该射频模块进行粗调匹配，剩余电容、电感及电阻用于对该射频模块进行细调匹配。
一种无线通信装置包括控制器及与该控制器相连的射频电路，该射频电路上述的射频电路。
相较于现有技术，本发明的阻抗匹配电路通过并联或者串联的两个或者多个电容、电感及电阻代替原有电容，将可供用户选择用来对射频模块进行阻抗匹配的元件值的范围进行扩大，使得用户可选择到与实际所需要的元件值更加接近的元件值，以提高射频性能。
 附图说明
图1所示是本发明较佳实施例的射频电路的电路图。
图2所示是现有技术中的功率放大器进行阻抗匹配的smith圆图。
主要元件符号说明
射频电路 100
射频模块 10
双工器 11
公共端 111
发射端 113
接收端 115
第一电阻 R1
第二电阻 R2
第三电阻 R3
阻抗匹配电路 30
电容单元 31
第一电容 C1
第二电容 C2
电感单元 32
第一电感 L1
第二电感 L2
第三电感 L3
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清除、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。
基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
参考图1所示，是本发明较佳实施例的射频电路的电路图。该射频电路100包括射频模块10，以及与该射频模块10相连的阻抗匹配电路30。该阻抗匹配电路30用于对该射频模块10进行阻抗匹配，使其达到指定的阻抗。该射频电路100可用于无线通信装置如移动电话，并与其内设置的控制器（图未示）相连，以进行信号收发。
在本较佳实施例中，该射频模块10包括双工器11。该双工器11包括公共端111、发射端113及接收端115。该公共端111经该阻抗匹配电路30与第一电阻R1相连后接地。该发射端113经第二电阻R2接地。该接收端115经第三电阻R3接地。
该阻抗匹配电路30包括电容单元31和电感单元32中至少一个或者多个的组合。其中，该组合中的电容单元和电感单元通过并联或者串联的方式相连，该电容单元31包括至少两个并联或者串联的电容。该电感单元32包括至少两个并联或者串联的电感。
在本较佳实施例中，该电容单元31包括并联的第一电容C1及第二电容C2，该并联的第一电容C1及第二电容C2可代替电容C0，其中 jωC0=jωC1+jωC2。该并联的第一电容C1及第二电容C2串联至该第一电阻R1与该公共端111之间。该电感单元32包括串联的第一电感L1及第二电感L2，串联的第一电感L1及第二电感L2可代替电感L0，jωL0=jωL1*jωL2/（jωL1+jωL2）。该串联的第一电感L1及第二电感L2一端连接至该电容单元31与该公共端111之间，另一端接地。该阻抗匹配电路30还包括第三电感L3，该第三电感L3的一端连接至该电容单元31与该第一电阻R1之间，另一端接地。
该电容单元31及电感单元32利用并联或者串联的方式连接两个或者多个电容（第一电容C1及第二电容C2）、电感（第一电感L1及第二电感L2）来代替一个电容C0、电感L0，将可供用户选择用来对射频模块10进行阻抗匹配的元件值的范围进行扩大，使得用户可选择到与实际所需要的元件值更加接近的元件值。例如，现有如果可供用户选择用来对双工器11进行阻抗匹配的电感的电感值只有1nH和0.6nH，则通过串联后可新增可供用户使用的电感值1.6nH，还可通过并联后新增加0.375nH。用户更容易选择到与实际所需要的元件值更加接近的元件值，从而获得较佳的匹配效果。
另外，本发明的阻抗匹配电路30还可以通过一个电容或者电感元件被两个或者多个电容或者电感元件元件替代后可以实现一个或多个电容或者电感元件进行粗调匹配，另一个或多个电容或者电感元件进行细调匹配。例如，第一电感L1的电感值为27nH左右时，双工器11即可获得较佳的匹配效果，再通过第二电感L2与第一电感L1串联对其阻抗值进行细调，使得双工器11可获得更佳的匹配效果。应该了解，该实施例仅为说明之用，在专利申请范围上并不受此结构的限制。
在另一较佳实施例中，该阻抗匹配电路30还包括电阻单元（图未示），该阻抗匹配电路30为该电容单元、该电感单元及该电阻单元中至少一个或者多个的组合，该电阻单元包括至少两个并联或者串联的电阻来代替一个电阻。
在本发明的另一较佳实施例中，该射频模块10包括射频收发器。该阻抗匹配电路30与该射频收发器的一个端口相连，对该射频模块10进行阻抗匹配，使其达到指定的阻抗。该端口为靠近该阻抗匹配电路30的端口。
可以理解，该射频模块10可为滤波器、功率放大器、天线等需要进行阻抗匹配的其他射频元件。
本发明的阻抗匹配电路30通过并联或者串联的两个或者多个电容、电感及电阻分别代替原有电容、电感及电阻，将可供用户选择用来对射频模块10进行阻抗匹配的元件值的范围进行扩大，使得用户可选择到与实际所需要的元件值更加接近的元件值，以提高射频性能。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。此外，显然“包括”一词不排除其他单元或，单数不排除复数。系统权利要求中陈述的多个单元或装置也可以由一个单元或装置通过软件或者硬件来实现。第一，第二等词语用来表示名称，而并不表示任何特定的顺序。
最后应说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或等同替换，而不脱离本发明技术方案的精神和范围。

Claims (9)

  1. 一种射频电路，其特征在于，该射频电路包括：
    射频模块；以及
    与该射频模块相连的阻抗匹配电路，该阻抗匹配电路包括电容单元和电感单元中至少一个或者多个的组合，其中，该组合中的电容单元和电感单元通过并联或者串联的方式相连，该电容单元包括至少两个并联或者串联的电容，该电感单元包括至少两个并联或者串联的电感。
  2. 如权利要求1所述的射频电路，其特征在于，该射频模块包括双工器，双工器包括公共端、发射端及接收端，该公共端经该阻抗匹配电路与第一电阻相连后接地，该发射端经第二电阻接地，该接收端经第三电阻接地。
  3. 如权利要求2所述的射频电路，其特征在于，该电容单元包括并联或者串联的第一电容及第二电容，该电容单元串联至该第一电阻与该公共端之间。
  4. 如权利要求3所述的射频电路，其特征在于，该电感单元包括并联或者串联的第一电感及第二电感，该电感单元一端连接至该电容单元与该公共端之间，另一端接地。
  5. 如权利要求3所述的射频电路，其特征在于，该阻抗匹配电路还包括第三电感，该第三电感的一端连接至该电容单元与该第一电阻之间，另一端接地。
  6. 如权利要求1所述的射频电路，其特征在于，该射频模块包括射频收发器，该射频收发器的至少一个端口与该阻抗匹配电路相连。
  7. 如权利要求1所述的射频电路，其特征在于，该阻抗匹配电路还包括电阻单元，该阻抗匹配电路为该电容单元、该电感单元和该电阻单元中的至少一个或者多个的组合，该电阻单元包括至少两个并联或者串联的电阻。
  8. 如权利要求1或7所述的射频电路，其特征在于，该电容单元、该电感单元及该电阻单元中的一个或者多个电容、电感及电阻用于对该射频模块进行粗调匹配，剩余电容、电感及电阻用于对该射频模块进行细调匹配。
  9. 一种无线通信装置包括控制器及与该控制器相连的射频电路，其特征在于，该射频电路为权利要求1-8任意一项所述的射频电路。
PCT/CN2016/100690 2016-08-31 2016-09-28 射频电路及具有该射频电路的无线通信装置 WO2018040178A1 (zh)

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