CN104716906A - Method and circuit structure for improving efficiency of wide-band radio frequency power amplifier - Google Patents
Method and circuit structure for improving efficiency of wide-band radio frequency power amplifier Download PDFInfo
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Abstract
本发明公开了一种提高宽带射频功率放大器效率的方法，即通过在宽带射频功率放大器的输出增加谐波抑制网络提升效率。本发明还公开了一种提高宽带射频功率放大器效率的电路结构，包括宽带射频功率放大级；宽带输出匹配网络，实现对输出信号进行有效的输出；谐波抑制网络，对输入到宽带输出匹配网络的信号进行谐波抑制，所述谐波抑制网络由至少两个二次谐波抑制网络并联连接在所述宽带射频功率放大级的输出与地之间所构成。本发明采用二次谐波抑制回路独立于输出匹配网络，可以灵活控制谐振频率点，有效抑制二次谐波，提高了功率放大器的效率及输出能力，同时，形成宽带匹配，使射频功率放大器能在较宽范围内工作，提高了射频功率放大器的性能。
The invention discloses a method for improving the efficiency of a broadband radio frequency power amplifier, that is, the efficiency is improved by adding a harmonic suppression network at the output of the broadband radio frequency power amplifier. The invention also discloses a circuit structure for improving the efficiency of a broadband radio frequency power amplifier, including a broadband radio frequency power amplification stage; a broadband output matching network to realize effective output of the output signal; a harmonic suppression network to Harmonic suppression is performed on the signal of the harmonic, and the harmonic suppression network is composed of at least two second harmonic suppression networks connected in parallel between the output of the broadband radio frequency power amplification stage and the ground. The invention adopts the second harmonic suppression circuit independent of the output matching network, can flexibly control the resonant frequency point, effectively suppress the second harmonic, improve the efficiency and output capability of the power amplifier, and at the same time, form broadband matching, so that the radio frequency power amplifier can Operates over a wider range, improving the performance of RF power amplifiers.
Description
技术领域 technical field
本发明涉及电子技术领域，涉及一种改善电路性能的方法，尤其涉及一种提高宽带射频功率放大器效率的方法及电路结构。 The invention relates to the field of electronic technology, and relates to a method for improving circuit performance, in particular to a method and circuit structure for improving the efficiency of a broadband radio frequency power amplifier.
背景技术 Background technique
随着无线通信技术的发展和人们生活水平的提高，人们对手持移动无线通信的要求已不满足于简单的语音通话要求，逐渐从基本语音电话需求向多媒体业务需求发展，以至于当前移动无线通信系统的复杂度迅速增加，多种移动通讯网络并存，例如现在广泛应用的2G、3G和4G移动通讯网络。为了支持这些不同工作频段的通讯网络，手机终端对射频功率放大器等的需求开始成倍增加。射频功率放大器芯片是智能手机等移动终端无线收发系统中一个非常重要的部件，其性能直接影响到手机的通话质量、信号发射强度、电池续航能力等。 With the development of wireless communication technology and the improvement of people's living standards, people's requirements for handheld mobile wireless communication are no longer satisfied with simple voice calls, and gradually develop from basic voice calls to multimedia services, so that the current mobile wireless communication The complexity of the system is increasing rapidly, and various mobile communication networks coexist, such as the widely used 2G, 3G and 4G mobile communication networks. In order to support these communication networks with different operating frequency bands, the demand for radio frequency power amplifiers etc. of mobile terminals begins to increase exponentially. The RF power amplifier chip is a very important component in the wireless transceiver system of mobile terminals such as smartphones, and its performance directly affects the call quality, signal transmission strength, and battery life of the mobile phone.
通常来说，射频功率放大器是窄带装置，需要为每个频带设计一个独立的射频功率大器。目前多模式、多频带蜂窝电话都包括有多个功率放大器以支持多个频带，大大增加的射频前端的复杂度。 Generally speaking, RF power amplifiers are narrow-band devices, requiring a separate RF power amplifier for each frequency band. Currently, multi-mode and multi-band cellular phones include multiple power amplifiers to support multiple frequency bands, which greatly increases the complexity of the radio frequency front end.
由于频谱资源的紧缺，很多工作频带都较窄，而且相邻。例如在频率范围2.3GHz~2.7GHz之间，就有4G LTE 网络的多个工作频带。通过将射频功率放大器的工作频带展宽可以实现兼容多个频带的功率放大器。图1示出了现有常用的宽带功率放大器的结构方框图，包括了宽带射频功率放大级和宽带输出匹配级。其中功率放大级实现宽带功率放大，宽带输出匹配网络实现宽带的功率输出。而这种结构的宽带射频功率放大器离中心频率越远的频率点能达到的输出功率以及效率都越低，总体效率也不高。 Due to the shortage of spectrum resources, many working frequency bands are narrow and adjacent. For example, in the frequency range of 2.3GHz~2.7GHz, there are multiple working frequency bands of 4G LTE network. A power amplifier compatible with multiple frequency bands can be realized by broadening the working frequency band of the radio frequency power amplifier. FIG. 1 shows a structural block diagram of a conventional broadband power amplifier, including a broadband radio frequency power amplification stage and a broadband output matching stage. The power amplification stage realizes broadband power amplification, and the broadband output matching network realizes broadband power output. However, the farther the frequency point of the broadband radio frequency power amplifier with this structure is from the center frequency, the lower the output power and efficiency it can achieve, and the overall efficiency is not high.
此外，为了保证射频功率放大器的输出不对其它频段进行干扰，一般需要对其支持的频带信号的谐波进行抑制，在有些应用中一个频带信号的谐波信号可能恰好位于另一个频带上，例如GSM900MHz频带信号的二次谐波刚好位于GSM1800MHz频带上。因此，为抑制一个频带的信号的谐波而设计的电路会抑制正好位于其谐波上的另外一个频带的正常信号。而且，有效的谐波抑制有助于提高功率放大器的效率。 In addition, in order to ensure that the output of the RF power amplifier does not interfere with other frequency bands, it is generally necessary to suppress the harmonics of the supported frequency band signals. In some applications, the harmonic signals of a frequency band signal may just be located in another frequency band, such as GSM900MHz The second harmonic of the frequency band signal is located exactly on the GSM1800MHz frequency band. Thus, a circuit designed to suppress the harmonics of a signal in one frequency band will suppress the normal signal in another frequency band that lies exactly on its harmonics. Also, effective harmonic suppression helps improve power amplifier efficiency.
发明内容 Contents of the invention
针对以上现有技术中的不足，本发明所要解决的技术问题提供一种提高宽带射频功率放大器效率的方法及电路结构，能够有效的抑制二次谐波，降低宽带射频功率放大器的谐波失真，提高宽带功率放大器的效率。 In view of the deficiencies in the prior art above, the technical problem to be solved by the present invention provides a method and a circuit structure for improving the efficiency of a broadband radio frequency power amplifier, which can effectively suppress the second harmonic and reduce the harmonic distortion of the broadband radio frequency power amplifier, Improve the efficiency of wideband power amplifiers.
为了解决上述技术问题，本发明实施例提供了一种提高宽带射频功率放大器效率的方法，包括： In order to solve the above technical problems, an embodiment of the present invention provides a method for improving the efficiency of a broadband radio frequency power amplifier, including:
在射频输入信号端连接宽带射频功率放大级，对射频输入信号进行放大； Connect a broadband radio frequency power amplification stage to the radio frequency input signal end to amplify the radio frequency input signal;
在信号输出端连接宽带输出匹配网络，对宽带射频功率放大级输出的放大信号进行有效的输出； The broadband output matching network is connected to the signal output end to effectively output the amplified signal output by the broadband radio frequency power amplifier stage;
在宽带射频功率放大级的输出与地之间连接谐波抑制网络，对输入到宽带输出匹配网络的信号进行谐波抑制，其中，所述谐波抑制网络由至少两个二次谐波抑制网络并联连接构成。 A harmonic suppression network is connected between the output of the broadband radio frequency power amplification stage and the ground, and the harmonic suppression is performed on the signal input to the broadband output matching network, wherein the harmonic suppression network consists of at least two second harmonic suppression networks connected in parallel.
相应地，本发明实施例还提供了一种提高宽带射频功率放大器效率的电路结构，包括： Correspondingly, an embodiment of the present invention also provides a circuit structure for improving the efficiency of a wideband radio frequency power amplifier, including:
宽带射频功率放大级，实现对射频输入信号进行放大； Broadband radio frequency power amplification stage, to realize the amplification of radio frequency input signal;
宽带输出匹配网络，实现对宽带射频功率放大级输出的放大信号进行有效的输出； The broadband output matching network realizes the effective output of the amplified signal output by the broadband radio frequency power amplifier stage;
谐波抑制网络，对输入到宽带输出匹配网络的信号进行谐波抑制； Harmonic suppression network, which suppresses the harmonics of the signal input to the broadband output matching network;
所述宽带射频功率放大级的输出通过所述谐波抑制网络和宽带输出匹配网络连接到射频功率放大器电路的输出端，所述谐波抑制网络由至少两个二次谐波抑制网络并联连接在宽带射频功率放大级的输出与地之间所构成。 The output of the broadband radio frequency power amplification stage is connected to the output end of the radio frequency power amplifier circuit through the harmonic suppression network and the broadband output matching network, and the harmonic suppression network is connected in parallel by at least two second harmonic suppression networks It is formed between the output of the broadband radio frequency power amplifier stage and the ground.
进一步的，所述二次谐波抑制网络由一个电容和一个电感串联连接构成，所述二次谐波抑制网络一端连接在所述宽带射频功率放大级和宽带输出匹配网络之间，另一端接地，使所述宽度输出匹配网络在整个工作频带内的二次谐波阻抗都很低。所述每个二次谐波抑制网络分别谐振在不同的二次谐波频率点上。 Further, the second harmonic suppression network is composed of a capacitor and an inductor connected in series, one end of the second harmonic suppression network is connected between the broadband RF power amplification stage and the broadband output matching network, and the other end is grounded , so that the second harmonic impedance of the wide output matching network is very low in the entire working frequency band. Each of the second harmonic suppression networks resonates at different second harmonic frequency points.
具体地，所述宽带输出匹配网络包括第一电感，第一电容，第二电感，第二电容和隔直电容；其中，第一电感一端为宽带输出匹配网络的信号输入端，另一端连接第一电容和第二电感；第一电容一端连接第一电感和第二电感，另一端接地；第二电感一端连接第一电感和第一电容，另一端连接第二电容和隔直电容；第二电容一端连接第二电感和隔直电容，另一端接地；隔直电容一端连接第二电感和第二电容，另一端为宽带输出匹配网络的输出端。 Specifically, the broadband output matching network includes a first inductor, a first capacitor, a second inductor, a second capacitor and a DC blocking capacitor; wherein, one end of the first inductor is the signal input end of the broadband output matching network, and the other end is connected to the first A capacitor and a second inductor; one end of the first capacitor is connected to the first inductor and the second inductor, and the other end is grounded; one end of the second inductor is connected to the first inductor and the first capacitor, and the other end is connected to the second capacitor and the DC blocking capacitor; the second One end of the capacitor is connected to the second inductor and the DC blocking capacitor, and the other end is grounded; one end of the DC blocking capacitor is connected to the second inductor and the second capacitor, and the other end is the output end of the broadband output matching network.
实施本发明实施例，具有如下有益效果： Implementing the embodiment of the present invention has the following beneficial effects:
本发明实施例提供的提高宽带射频功率放大器效率的方法及电路结构，采用二次谐波抑制回路独立于输出匹配网络，可以灵活控制谐振频率点，有效抑制二次谐波，提高了功率放大器的效率及输出能力，同时，形成宽带匹配，使射频功率放大器能在较宽范围内工作，提高了射频功率放大器的性能。 The method and circuit structure for improving the efficiency of the broadband radio frequency power amplifier provided by the embodiments of the present invention adopt the second harmonic suppression loop independent of the output matching network, which can flexibly control the resonance frequency point, effectively suppress the second harmonic, and improve the performance of the power amplifier. Efficiency and output capability, at the same time, forming a broadband matching, so that the radio frequency power amplifier can work in a wider range, and improve the performance of the radio frequency power amplifier.
附图说明 Description of drawings
图1是现有技术中的宽带射频功率放大器电路的电路结构图。 Fig. 1 is a circuit structure diagram of a broadband radio frequency power amplifier circuit in the prior art.
图2是本发明实施例提供的提高宽带射频功率放大器效率的电路结构的结构示意图。 Fig. 2 is a schematic structural diagram of a circuit structure for improving the efficiency of a broadband radio frequency power amplifier provided by an embodiment of the present invention.
图3是本发明实施例提供的提高宽带射频功率放大器效率的电路结构的宽带输出匹配网络的结构示意图。 Fig. 3 is a schematic structural diagram of a wideband output matching network of a circuit structure for improving the efficiency of a wideband radio frequency power amplifier provided by an embodiment of the present invention.
图4是本发明另一个实施例提供的提高宽带射频功率放大器效率的电路结构的结构示意图。 Fig. 4 is a schematic structural diagram of a circuit structure for improving the efficiency of a wideband radio frequency power amplifier provided by another embodiment of the present invention.
图5是常用的宽带输出匹配网络的插入损耗随频率变化的仿真曲线。 Fig. 5 is a simulation curve of the insertion loss of a commonly used broadband output matching network as a function of frequency.
图6是采用本发明提供的方法后的宽带输出匹配网络的插入损耗随频率变化的仿真曲线。 Fig. 6 is a simulation curve of the insertion loss of the broadband output matching network as a function of frequency after adopting the method provided by the present invention.
具体实施方式 Detailed ways
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楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，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作出创造性劳动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。 The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
参见图2，是本发明实施提供的提高宽带射频功率放大器效率的电路结构的结构示意图，如图所示： Referring to Fig. 2, it is the structural representation of the circuit structure that the implementation of the present invention provides to improve the efficiency of the broadband radio frequency power amplifier, as shown in the figure:
本发明提高宽带射频功率放大器效率的电路结构主要由三部分组成：宽带射频功率放大级201，宽带输出匹配网络202以及谐波抑制网络203。 The circuit structure for improving the efficiency of the broadband radio frequency power amplifier in the present invention is mainly composed of three parts: a broadband radio frequency power amplification stage 201 , a broadband output matching network 202 and a harmonic suppression network 203 .
在具体实施当中，所述宽带射频功率放大级201是实现对射频输入信号进行放大，所述宽带输出匹配网络202是实现对宽带射频功率放大级201输出的放大信号进行有效的输出，所述谐波抑制网络203对输入到宽带输出匹配网络202的信号进行谐波抑制，提高了功率放大器的效率及输出能力，同时，形成宽带匹配，使射频功率放大器能在较宽范围内工作，提高了射频功率放大器的性能。 In a specific implementation, the broadband radio frequency power amplification stage 201 is to amplify the radio frequency input signal, the broadband output matching network 202 is to effectively output the amplified signal output by the broadband radio frequency power amplification stage 201, and the harmonic The harmonic suppression network 203 suppresses the harmonics of the signal input to the broadband output matching network 202, which improves the efficiency and output capability of the power amplifier. performance of the power amplifier.
所述宽带射频功率放大级201的输出通过所述谐波抑制网络203和宽带输出匹配网络202连接到射频功率放大器电路的输出端，所述谐波抑制网络203由至少两个二次谐波抑制网络并联连接在宽带射频功率放大级201的输出与地之间所构成。 The output of the broadband radio frequency power amplification stage 201 is connected to the output end of the radio frequency power amplifier circuit through the harmonic suppression network 203 and the broadband output matching network 202, and the harmonic suppression network 203 is suppressed by at least two second harmonics The parallel connection of the network is formed between the output of the broadband radio frequency power amplifier stage 201 and the ground.
具体地，所述谐波抑制网络203包括在所述宽带射频功率放大级输出与地之间连接的二个或n个（n大于2）由电容和电感串联连接的二次谐波抑制网络，所述二次谐波抑制网络如图2中所示的204、205 、… 206，其中包括电容C1、电感L1、电容C2、电感L2、电容Cn和电感Ln。此外，构成二次谐波抑制网络的电容和电感的先后顺序根据需要可以变化，所述二次谐波抑制网络一端连接在所述宽带射频功率放大级和宽带输出匹配网络之间，另一端接地，即所述电容或电感的其中一端连接功率放大器，另外一端接地，二次谐波抑制网络使所述宽度输出匹配网络在整个工作频带内的二次谐波阻抗都很低。 Specifically, the harmonic suppression network 203 includes two or n (n greater than 2) second harmonic suppression networks connected in series by capacitors and inductors connected between the output of the broadband radio frequency power amplification stage and ground, The second harmonic suppression network is shown as 204, 205, ... 206 in Figure 2, which includes capacitor C1, inductor L1, capacitor C2, inductor L2, capacitor Cn and inductor Ln. In addition, the sequence of capacitors and inductors forming the second harmonic suppression network can be changed according to needs. One end of the second harmonic suppression network is connected between the broadband RF power amplifier stage and the broadband output matching network, and the other end is grounded. , that is, one end of the capacitor or inductor is connected to the power amplifier, and the other end is grounded, and the second harmonic suppression network makes the second harmonic impedance of the width output matching network very low in the entire working frequency band.
所述n个二次谐波抑制网络分别谐振在不同的频率点上，为了方便计算或应用，谐振点可以是等频率间隔。此外，n的具体取值根据需要而定。 The n second harmonic suppression networks resonate at different frequency points respectively, and for the convenience of calculation or application, the resonance points may be at equal frequency intervals. In addition, the specific value of n depends on requirements.
谐振频率的计算公式为： The formula for calculating the resonant frequency is:
其中f为谐振频率，L为谐振网络电感值，C为谐振网络电容值。 Where f is the resonance frequency, L is the inductance value of the resonance network, and C is the capacitance value of the resonance network.
因此本发明中，第n个（n为大于0的自然数）二次谐波抑制网络的谐振频率的计算公式为： Therefore in the present invention, the calculation formula of the resonant frequency of the nth (n is a natural number greater than 0) second harmonic suppression network is:
其中fn为2倍于工作频率点的谐振频率，Ln为谐振网络电感值，Cn为谐振网络电容值。 Among them, fn is the resonant frequency twice the operating frequency point, Ln is the inductance value of the resonant network, and Cn is the capacitance value of the resonant network.
具体地，在其中一个实施方式中，如图3所示，为本发明实施例提供的提高宽带射频功率放大器效率的电路结构的宽带输出匹配网络的结构示意图，该宽带输出匹配网络包括有：第一电感301，第一电容302，第二电感303，第二电容304和隔直电容305。其中，第一电感301一端为匹配网络的信号输入端，另一端连接第一电容302和第二电感303；第一电容302一端连接第一电感301和第二电感303，另一端接地；第二电感303一端连接第一电感301和第一电容302，另一端连接第二电容304和隔直电容305；第二电容304一端连接第二电感303和隔直电容305，另一端接地；隔直电容305一端连接第二电感303和第二电容304，另一端为匹配网络的输出端。 Specifically, in one of the implementation manners, as shown in FIG. 3 , it is a schematic structural diagram of a wideband output matching network of a circuit structure for improving the efficiency of a wideband radio frequency power amplifier provided by an embodiment of the present invention. The wideband output matching network includes: An inductor 301 , a first capacitor 302 , a second inductor 303 , a second capacitor 304 and a DC blocking capacitor 305 . Wherein, one end of the first inductor 301 is the signal input end of the matching network, and the other end is connected to the first capacitor 302 and the second inductor 303; one end of the first capacitor 302 is connected to the first inductor 301 and the second inductor 303, and the other end is grounded; One end of the inductor 303 is connected to the first inductor 301 and the first capacitor 302, and the other end is connected to the second capacitor 304 and the DC blocking capacitor 305; one end of the second capacitor 304 is connected to the second inductor 303 and the DC blocking capacitor 305, and the other end is grounded; the DC blocking capacitor One end of 305 is connected to the second inductor 303 and the second capacitor 304, and the other end is the output end of the matching network.
图4是本发明另一个实施例提供的提高宽带射频功率放大器效率的电路结构的结构示意图，其中二次谐波抑制网络数量n取值为3，所述二次谐波抑制网络如图4中所示的406、407 和408，其中包括电容C1、电感L1、电容C2、电感L2、以及电容C3和电感L3。如果宽带功率放大器的工作频率范围为2.3GHz~2.7GHz，那么二次谐波抑制网络的谐振频率f1、f2和f3可以分别取值为4.8GHz、5.0GHz和5.2GHz。本发明另一个实施例提供的提高宽带射频功率放大器效率的电路结构的宽带输出匹配网络包括有：第一电感401，第一电容402，第二电感403，第二电容404和隔直电容405。其中，第一电感401一端为匹配网络的信号输入端，另一端连接第一电容402和第二电感403；第一电容402一端连接第一电感401和第二电感403，另一端接地；第二电感403一端连接第一电感401和第一电容402，另一端连接第二电容404和隔直电容405；第二电容404一端连接第二电感403和隔直电容405，另一端接地；隔直电容405一端连接第二电感403和第二电容404，另一端为匹配网络的输出端。 Fig. 4 is a structural schematic diagram of a circuit structure for improving the efficiency of a broadband radio frequency power amplifier provided by another embodiment of the present invention, wherein the number n of the second harmonic suppression network is 3, and the second harmonic suppression network is as shown in Fig. 4 The shown 406, 407 and 408 include capacitor C1, inductor L1, capacitor C2, inductor L2, and capacitor C3 and inductor L3. If the operating frequency range of the broadband power amplifier is 2.3GHz~2.7GHz, then the resonant frequencies f1, f2 and f3 of the second harmonic suppression network can be 4.8GHz, 5.0GHz and 5.2GHz respectively. Another embodiment of the present invention provides a broadband output matching network of a circuit structure for improving the efficiency of a broadband radio frequency power amplifier, including: a first inductor 401 , a first capacitor 402 , a second inductor 403 , a second capacitor 404 and a DC blocking capacitor 405 . Wherein, one end of the first inductor 401 is the signal input end of the matching network, and the other end is connected to the first capacitor 402 and the second inductor 403; one end of the first capacitor 402 is connected to the first inductor 401 and the second inductor 403, and the other end is grounded; One end of the inductor 403 is connected to the first inductor 401 and the first capacitor 402, and the other end is connected to the second capacitor 404 and the DC blocking capacitor 405; one end of the second capacitor 404 is connected to the second inductor 403 and the DC blocking capacitor 405, and the other end is grounded; the DC blocking capacitor One end of 405 is connected to the second inductor 403 and the second capacitor 404, and the other end is the output end of the matching network.
本发明还提供了一种提高宽带射频功率放大器效率的方法，在射频输入信号端连接宽带射频功率放大级201，对射频输入信号进行放大；在信号输出端连接宽带输出匹配网络202，对宽带射频功率放大级输出的放大信号进行有效的输出；在宽带射频功率放大级201的输出与地之间连接谐波抑制网络203，对输入到宽带输出匹配网络202的信号进行谐波抑制。其中，所述谐波抑制网络203由至少两个二次谐波抑制网络并联连接构成。 The present invention also provides a method for improving the efficiency of a broadband radio frequency power amplifier. Connect a broadband radio frequency power amplification stage 201 to the radio frequency input signal end to amplify the radio frequency input signal; connect a broadband output matching network 202 to the signal output end to amplify the broadband radio frequency The amplified signal output by the power amplification stage is effectively output; the harmonic suppression network 203 is connected between the output of the broadband radio frequency power amplification stage 201 and the ground, and the harmonic suppression is performed on the signal input to the broadband output matching network 202 . Wherein, the harmonic suppression network 203 is composed of at least two second harmonic suppression networks connected in parallel.
进一步的，所述二次谐波抑制网络由一个电容和一个电感串联连接构成，将二次谐波抑制网络一端连接在所述宽带射频功率放大级201和宽带输出匹配网络202之间，另一端接地，所述二次谐波抑制网络如图2中所示的204、205 、… 206，其中包括电容C1、电感L1、电容C2、电感L2、电容Cn和电感Ln。使所述宽度输出匹配网络在整个工作频带内的二次谐波阻抗都很低，每个二次谐波抑制网络分别谐振在不同的二次谐波频率点上。 Further, the second harmonic suppression network is composed of a capacitor and an inductor connected in series, and one end of the second harmonic suppression network is connected between the broadband radio frequency power amplification stage 201 and the broadband output matching network 202, and the other end Grounded, the second harmonic suppression network as shown in Figure 2 204, 205, ... 206, including capacitor C1, inductor L1, capacitor C2, inductor L2, capacitor Cn and inductor Ln. The second harmonic impedance of the width output matching network is very low in the entire working frequency band, and each second harmonic suppression network resonates at different second harmonic frequency points respectively.
图5为是常用的宽带输出匹配网络的插入损耗随频率变化的仿真曲线，图6为是采用本发明提供的方法后的宽带输出匹配网络的插入损耗随频率变化的仿真曲线。 Fig. 5 is a simulation curve of the insertion loss of a commonly used wideband output matching network as a function of frequency, and Fig. 6 is a simulation curve of the insertion loss of a wideband output matching network as a function of frequency after the method provided by the present invention is adopted.
对比图5和图6可知，采用本发明提供的方法后的宽带输出匹配网络在频率点4.8GHz、5.0GHz和5.2GHz的抑制效果，分别改善了38dB，40dB和40dB；在工作频率的二次谐波范围内的整体抑制效果也提高了10dB以上。可以得到采用本发明提供的一种提高宽带射频功率放大器效率的方法及电路结构所设计功率放大器可以明显地抑制功率放大器的二次谐波，改善了功率放大器的效率及线性度。 Comparing Fig. 5 and Fig. 6, it can be seen that the suppression effect of the broadband output matching network at frequency points 4.8GHz, 5.0GHz and 5.2GHz after adopting the method provided by the present invention has been improved by 38dB, 40dB and 40dB respectively; The overall rejection in the harmonic range has also been improved by more than 10dB. It can be obtained that the power amplifier designed by adopting the method for improving the efficiency of the broadband radio frequency power amplifier and the circuit structure provided by the present invention can obviously suppress the second harmonic of the power amplifier, and improve the efficiency and linearity of the power amplifier.
本发明实施例提供的提高宽带射频功率放大器效率的方法及电路结构，采用二次谐波抑制回路独立于输出匹配网络，可以灵活控制谐振频率点，有效抑制二次谐波，提高了功率放大器的效率及输出能力，同时，形成宽带匹配，使射频功率放大器能在较宽范围内工作，提高了射频功率放大器的性能。 The method and circuit structure for improving the efficiency of the broadband radio frequency power amplifier provided by the embodiments of the present invention adopt the second harmonic suppression loop independent of the output matching network, which can flexibly control the resonance frequency point, effectively suppress the second harmonic, and improve the performance of the power amplifier. Efficiency and output capability, at the same time, forming a broadband matching, so that the radio frequency power amplifier can work in a wider range, and improve the performance of the radio frequency power amplifier.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。 The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634417A (en) * | 2016-01-28 | 2016-06-01 | 锐迪科微电子（上海）有限公司 | Multi-band radio frequency power amplifier |
| CN105811888A (en) * | 2016-04-20 | 2016-07-27 | 广东工业大学 | Radio frequency power amplifier output match circuit structure and designing method thereof |
| CN106253866A (en) * | 2016-08-03 | 2016-12-21 | 苏州能讯高能半导体有限公司 | A kind of power amplifier |
| CN106470014A (en) * | 2015-08-17 | 2017-03-01 | 飞思卡尔半导体公司 | Having harmonic wave prevents the output impedance matching networks of circuit |
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| CN107425818A (en) * | 2017-04-17 | 2017-12-01 | 东莞赛唯莱特电子技术有限公司 | A kind of output matching circuit structure for improving radio-frequency power amplifier harmonic performance |
| CN107786242A (en) * | 2016-08-26 | 2018-03-09 | 三星电机株式会社 | Reception with improvement is with the RF transmitter for suppressing function |
| CN108540164A (en) * | 2018-04-08 | 2018-09-14 | 广州慧智微电子有限公司 | A kind of radio-frequency front-end system |
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| WO2019051660A1 (en) * | 2017-09-13 | 2019-03-21 | 北京泰龙电子技术有限公司 | Radio-frequency power supply for improving efficiency of radio-frequency power amplifier |
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| CN110120789A (en) * | 2018-12-19 | 2019-08-13 | 佛山臻智微芯科技有限公司 | A kind of broadband matching circuit structure with limitation of high harmonics |
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| CN110504922A (en) * | 2018-05-18 | 2019-11-26 | 恩智浦美国有限公司 | Broadband power transistor unit and amplifier and its manufacturing method |
| CN112039448A (en) * | 2019-06-04 | 2020-12-04 | 株式会社村田制作所 | Power amplifying circuit |
| CN112751536A (en) * | 2020-12-23 | 2021-05-04 | Oppo广东移动通信有限公司 | Output matching circuit, terminal and output matching method |
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| CN114696844A (en) * | 2020-12-31 | 2022-07-01 | 炬芯科技股份有限公司 | Wireless signal transmitting device with harmonic suppression function and harmonic suppression method |
| WO2023019909A1 (en) * | 2021-08-17 | 2023-02-23 | 深圳飞骧科技股份有限公司 | Harmonic suppression circuit, power amplifier module, communication device, and communication system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2057216A (en) * | 1979-08-22 | 1981-03-25 | Robin H | High power radio frequency amplifier |
| CN1578125A (en) * | 2003-06-26 | 2005-02-09 | 松下电器产业株式会社 | Power amplifier, power distributor, and power combiner |
| JP2006295371A (en) * | 2005-04-07 | 2006-10-26 | Matsushita Electric Ind Co Ltd | Power amplifier module |
| CN101478288A (en) * | 2008-11-24 | 2009-07-08 | 锐迪科微电子（上海）有限公司 | Method for enhancing efficiency of radio frequency power amplifier and radio frequency power amplifier circuit |
| CN101674051A (en) * | 2009-09-22 | 2010-03-17 | 锐迪科微电子（上海）有限公司 | Method for improving efficiency of radio frequency power amplifier and radio frequency power amplifier circuit |
| CN103973234A (en) * | 2013-01-31 | 2014-08-06 | 沈阳中科微电子有限公司 | Harmonic inhibition combinational circuit for radio frequency power amplifier |
-
2015
- 2015-04-03 CN CN201510156487.7A patent/CN104716906A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2057216A (en) * | 1979-08-22 | 1981-03-25 | Robin H | High power radio frequency amplifier |
| CN1578125A (en) * | 2003-06-26 | 2005-02-09 | 松下电器产业株式会社 | Power amplifier, power distributor, and power combiner |
| JP2006295371A (en) * | 2005-04-07 | 2006-10-26 | Matsushita Electric Ind Co Ltd | Power amplifier module |
| CN101478288A (en) * | 2008-11-24 | 2009-07-08 | 锐迪科微电子（上海）有限公司 | Method for enhancing efficiency of radio frequency power amplifier and radio frequency power amplifier circuit |
| CN101674051A (en) * | 2009-09-22 | 2010-03-17 | 锐迪科微电子（上海）有限公司 | Method for improving efficiency of radio frequency power amplifier and radio frequency power amplifier circuit |
| CN103973234A (en) * | 2013-01-31 | 2014-08-06 | 沈阳中科微电子有限公司 | Harmonic inhibition combinational circuit for radio frequency power amplifier |
Cited By (34)
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| CN108781059A (en) * | 2016-03-11 | 2018-11-09 | 英特尔公司 | It is distorted the ultra-compact multifrequency tape sender from suppression technology using strong AM-PM |
| US11424722B2 (en) | 2016-03-11 | 2022-08-23 | Intel Corporation | Ultra compact multi-band transmitter with robust AM-PM distortion self-suppression techniques |
| CN109728785B (en) * | 2016-03-11 | 2023-07-25 | 英特尔公司 | Ultra-compact multi-band transmitter using robust AM-PM distortion self-suppression techniques |
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| US11923809B2 (en) | 2016-03-11 | 2024-03-05 | Intel Corporation | Ultra compact multi-band transmitter with robust AM-PM distortion self-suppression techniques |
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| CN105811888A (en) * | 2016-04-20 | 2016-07-27 | 广东工业大学 | Radio frequency power amplifier output match circuit structure and designing method thereof |
| CN106253866A (en) * | 2016-08-03 | 2016-12-21 | 苏州能讯高能半导体有限公司 | A kind of power amplifier |
| CN107786242B (en) * | 2016-08-26 | 2021-06-18 | 三星电机株式会社 | Radio frequency transmitter with improved reception band suppression |
| CN107786242A (en) * | 2016-08-26 | 2018-03-09 | 三星电机株式会社 | Reception with improvement is with the RF transmitter for suppressing function |
| CN106549638A (en) * | 2016-10-31 | 2017-03-29 | 唯捷创芯(天津)电子技术股份有限公司 | A kind of suppression harmonic wave and spuious radio-frequency power amplifier, chip and communication terminal |
| US10879850B2 (en) | 2016-10-31 | 2020-12-29 | Vanchip (Tianjin) Technology Co., Ltd. | Radio frequency power amplifier for inhibiting harmonic wave and stray, chip and communication terminal |
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| CN108540164A (en) * | 2018-04-08 | 2018-09-14 | 广州慧智微电子有限公司 | A kind of radio-frequency front-end system |
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