WO2019051660A1 - 一种提高射频功率放大器效率的射频电源 - Google Patents

一种提高射频功率放大器效率的射频电源 Download PDF

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Publication number
WO2019051660A1
WO2019051660A1 PCT/CN2017/101524 CN2017101524W WO2019051660A1 WO 2019051660 A1 WO2019051660 A1 WO 2019051660A1 CN 2017101524 W CN2017101524 W CN 2017101524W WO 2019051660 A1 WO2019051660 A1 WO 2019051660A1
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radio frequency
harmonic
frequency power
frequency signal
power amplifier
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PCT/CN2017/101524
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English (en)
French (fr)
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崔晨
李勇滔
孙小孟
李楠
赵丽莉
夏洋
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北京泰龙电子技术有限公司
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Priority to PCT/CN2017/101524 priority Critical patent/WO2019051660A1/zh
Publication of WO2019051660A1 publication Critical patent/WO2019051660A1/zh

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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion

Definitions

  • the present invention relates to the field of semiconductor process equipment, and in particular to an RF power supply for improving the efficiency of a radio frequency power amplifier.
  • RF power is a RF power source used to generate RF power signals. It is a core component of semiconductor process equipment. All devices that generate plasma for material processing require RF power to provide energy.
  • RF power amplifiers are an important part of the transmitting device.
  • the main technical indicators of RF power amplifiers are output power and efficiency.
  • the invention solves the technical problem that the efficiency of the radio frequency power amplifier is low and the interference of the harmonic component is easy to occur by providing an RF power source for improving the efficiency of the radio frequency power amplifier, and the efficiency of the radio frequency power amplifier is greatly improved.
  • An RF power source for improving the efficiency of a radio frequency power amplifier comprising: a radio frequency signal generator, the radio frequency signal generator transmitting a radio frequency signal; a front end driver, an input end of the front end driver and the radio frequency signal generator The output end is connected to receive the radio frequency signal emitted by the radio frequency signal generator; the radio frequency power amplifier, the input end of the radio frequency power amplifier is connected to the output end of the front end driver, and receives the radio frequency signal transmitted by the front end driver, The signal is amplified and output; a harmonic network, an input end of the harmonic network is connected to an output end of the radio frequency power amplifier, and receives the radio frequency signal output by the radio frequency power amplifier to suppress harmonics of the radio frequency signal; An input end of the matching network is connected to an output end of the radio frequency power amplifier, and after receiving the radio frequency signal output by the radio frequency power amplifier, outputting the radio frequency signal; a radio frequency power detector, the radio frequency power detector The input end is connected to the output end of the matching network, receives
  • the harmonic network further includes: a second harmonic low resistance network, an input end of the second harmonic low resistance network is connected to an output end of the radio frequency power amplifier, and the second harmonic low resistance The output end of the network is grounded, and the radio frequency signal output by the radio frequency power amplifier is received, and the second harmonic of the radio frequency signal is suppressed;
  • the harmonic network further includes: a high-order harmonic low-resistance network, an input end of the high-order harmonic low-resistance network is connected to an output end of the radio frequency power amplifier, and the high-order harmonic low-resistance The output end of the network is grounded, and the radio frequency signal output by the radio frequency power amplifier is received, and the higher harmonics of the radio frequency signal are suppressed;
  • the harmonic network further comprises: the second harmonic low resistance network and the higher harmonic low resistance network are connected in parallel to an output end of the radio frequency power amplifier to form a third harmonic high resistance network, The third harmonic of the radio frequency signal is suppressed.
  • the second harmonic low resistance network further includes: a first resistor, an input end of the first resistor is connected in series with an output end of the second harmonic low resistance network; a first capacitor, the first An input end of a capacitor is connected in series with an output end of the first resistor, and an output end of the first capacitor of the litigation lake is grounded; wherein the first resistor forms a series resonant network with the first capacitor, and the second Harmonic output resistance anti.
  • the higher harmonic low resistance network further includes: a second capacitor, wherein the second capacitor is grounded in parallel with the higher harmonic low resistance network to reduce an output impedance of the higher harmonic.
  • the invention provides an RF power source for improving the efficiency of a radio frequency power amplifier, and obtains a radio frequency signal by using a radio frequency signal generator; the radio frequency signal is transmitted to a radio frequency power amplifier through a front end driver, and the radio frequency signal is amplified and output; Receiving, by the wave network, the radio frequency signal output by the radio frequency power amplifier to suppress harmonics; after receiving the radio frequency signal output by the harmonic network through a matching network, outputting the radio frequency signal; and passing the radio frequency power detector Receiving the radio frequency signal, after detecting the radio frequency signal, outputting the radio frequency signal, and respectively delivering current to the module through the power supply line.
  • the invention is connected in parallel with the higher harmonic low resistance network to the output end of the radio frequency power amplifier through a second harmonic low resistance network to form a third harmonic high resistance network.
  • the invention solves the technical problem that the efficiency of the radio frequency power amplifier is low and the interference of the harmonic component is easy to occur in the prior art, and the second harmonic, the third harmonic and the higher harmonic can be suppressed, and the efficiency of the radio frequency power amplifier is greatly improved.
  • the second harmonic low resistance network of the invention comprises a first resistor and a first capacitor
  • the high harmonic low resistance network comprises a second capacitor, which solves the low efficiency of the RF power amplifier in the prior art and is prone to harmonics.
  • the technical problem of component interference further achieves the technical effect of greatly improving the efficiency of the RF power amplifier and reducing the harmonic distortion of the RF power amplifier.
  • FIG. 1 is a schematic structural diagram of an RF power supply for improving the efficiency of a radio frequency power amplifier according to the present invention.
  • radio frequency signal generator 1 front end driver 2, radio frequency power amplifier 3, harmonic network 4, second harmonic low resistance network 41, high harmonic low impedance network 42, matching network 5, radio frequency power detection 6, power supply line 7.
  • the radio frequency power source includes: obtaining a radio frequency signal by using a radio frequency signal generator; and transmitting the radio frequency signal to a radio frequency power amplifier through a front end driver, where the radio frequency signal is Outputting the amplified signal; receiving the radio frequency signal output by the radio frequency power amplifier through a harmonic network, suppressing harmonics; receiving the radio frequency signal output by the harmonic network through a matching network, and outputting the radio frequency signal Receiving, by the radio frequency power detector, the radio frequency signal, after detecting the radio frequency signal, outputting the radio frequency signal, and respectively supplying current to the module through the power supply line.
  • FIG. 1 is a schematic structural diagram of an RF power supply for improving the efficiency of a radio frequency power amplifier according to the present invention.
  • the radio frequency power supply includes:
  • a radio frequency signal generator 1 that transmits a radio frequency signal.
  • the radio frequency signal is a modulated radio wave having a certain transmission frequency
  • the radio frequency signal generator 1 is a type of a signal generator.
  • the mixed signal source mainly outputs an analog waveform; the logic signal source outputs a digital code shape.
  • the mixed signal source can be further divided into a function signal generator and an arbitrary waveform/function generator, wherein the function signal generator outputs a standard waveform, such as a sine wave, a square wave, etc., and the arbitrary wave/function generator outputs a user-defined arbitrary waveform;
  • the logic signal generator can be further divided into a pulse signal generator and a pattern generator, wherein the pulse signal generator drives a small number of square wave or pulse wave outputs, and the pattern generator generates digital patterns of many channels.
  • the AFG3000 series produced by Tektronix includes functions of a function signal generator, an arbitrary waveform/function signal generator, and a pulse signal generator.
  • the signal source can also be classified according to the type of the output signal, such as a radio frequency signal generator, a scanning signal generator, a frequency synthesizer, a noise signal generator, a pulse signal generator, and the like.
  • the signal source can also be classified according to the frequency band used, and the signal sources of different frequency bands correspond to different application fields.
  • the front end driver 21, the input end of the front end driver 21 is connected to the output end of the radio frequency signal generator 1, and receives the radio frequency signal transmitted by the radio frequency signal generator 1.
  • the front end driver 21 is configured to transmit a signal sent by the radio frequency signal generator 1 to ensure that the signal is not attenuated when being sent to the radio frequency power amplifier 22, and the radio frequency signal generator 1 is consistent when issued.
  • An RF power amplifier 22 an input of the RF power amplifier 22 and the front end driver
  • the output end of the 21 is connected to receive the radio frequency signal transmitted by the front end driver, and the signal is amplified and output.
  • the RF power amplifier 22 is an important component of various wireless transmitters.
  • the RF signal generated by the modulating oscillating circuit has a small power, and needs to pass through a series of amplification-buffering stage, intermediate amplification stage, and final stage power amplification stage, and after obtaining sufficient RF power, it can feed Radiate out onto the antenna.
  • the RF power amplifier 22 In order to obtain a sufficiently large RF output power, the RF power amplifier 22 must be employed.
  • harmonic network 4 an input end of the harmonic network 4 is connected to an output end of the radio frequency power amplifier 3, receiving the radio frequency signal output by the radio frequency power amplifier 3, and suppressing harmonics of the radio frequency signal .
  • the harmonic network 4 specifically includes: a second harmonic low resistance network 41, and an input end of the second harmonic low resistance network 41 is connected to an output end of the radio frequency power amplifier 3, the second The output end of the harmonic low-resistance network 41 is grounded, and receives the radio frequency signal output by the radio frequency power amplifier 3 to suppress the second harmonic of the radio frequency signal; the high-order harmonic low-resistance network 42 is high.
  • An input end of the subharmonic low resistance network 42 is connected to an output end of the radio frequency power amplifier 3, an output end of the higher harmonic low resistance network 42 is grounded, and the radio frequency signal output by the radio frequency power amplifier 3 is received.
  • the radio frequency signal output by the radio frequency power amplifier 3 generates harmonic components of different frequencies, including the second harmonic, the higher harmonic, the third harmonic, etc., and the harmonics of different frequencies may Interfering with the radio frequency signal, in order to reduce the harmonic component
  • the harmonic power network 4 is disposed at the output end of the radio frequency power amplifier, and the harmonic network 4 includes the second harmonic low resistance network 41, Reducing the second harmonic generated by the radio frequency power amplifier by reducing the second harmonic impedance of the output matching network, the higher harmonic network 42 by reducing the high harmonics of the output matching network Wave impedance, thereby suppressing higher harmonics generated by the radio frequency power amplifier, the third harmonic high-caution network is connected to the radio frequency in parallel with the higher harmonic low-resistance network
  • the output of the power amplifier is configured such that the impedance of the third harmonic is increased, thereby suppressing the third harmonic generated by the RF power amplifier, thereby greatly improving the efficiency of the RF power amplifier 3 and reducing the harmonic of the RF power amplifier 3.
  • the second harmonic low resistance network 41 further includes: a first resistor, an input end of the first resistor is connected in series with an output end of the second harmonic low resistance network; a first capacitor, the An input end of the first capacitor is connected in series with an output end of the first resistor, and an output end of the first capacitor is grounded, wherein the first resistor forms a series resonant network with the first capacitor, and the second The output impedance of the subharmonic.
  • the second harmonic low-resistance network 41 is specifically: the second harmonic low-resistance network 41 is grounded in series with the first resistor through the first capacitor to form an LC series resonant network,
  • the LC series resonant network is in a series circuit composed of resistors, inductors and capacitors. When the capacitive reactance and the inductive reactance are equal, the phase of the voltage and current in the circuit is the same, and the circuit exhibits pure resistance. When the circuit undergoes series resonance, the total impedance in the circuit is minimal and the current will reach its maximum value.
  • the resonant frequency is at the second harmonic, so that the output of the RF power amplifier 3 matches the network at the output impedance of the second harmonic to a minimum.
  • the higher harmonic low resistance network 42 further includes: a second capacitor, the second capacitor is grounded in parallel with the higher harmonic low resistance network, and the output impedance of the higher harmonic is reduced.
  • the higher harmonic low resistance network 42 is directly grounded in parallel through the second capacitor, and the second capacitor is used to cancel higher harmonics of the output of the radio frequency power amplifier, so that the radio frequency power amplifier
  • the output of the 3 matching network reaches the lowest value at the output impedance of the higher harmonics.
  • the matching network 5 is connected to the output end of the radio frequency power amplifier 3, and after receiving the radio frequency signal output by the radio frequency power amplifier, the radio frequency signal is output.
  • the RF power detector 6 is connected to the output end of the matching network 5, and receives the radio frequency signal output by the matching network 5, and inputs the radio frequency signal into the radio frequency signal. After the line is detected, the radio frequency signal is output.
  • the radio frequency power detector 3 receives the transmission sent by the matching network 5. a signal that detects the signal and outputs the signal.
  • the device 6 is connected to respectively deliver current to the radio frequency signal generator, the front end driver, the radio frequency power amplifier, the harmonic network, the matching network, and the radio frequency power detector.
  • the present invention adds a second harmonic low resistance network 41 and a higher harmonic low resistance network 42 to the output of the RF power amplifier 3, so that the output of the RF power amplifier 3 matches the second harmonic and higher harmonics of the network 5.
  • the impedance is very low, and the third harmonic impedance is very high.
  • the output voltage of the RF power amplifier 3 is shaped into a square wave, and the output current is shaped into a half wave, so whether it is in the second harmonic or the third harmonic or higher harmonic. At the time of frequency, no harmonic power is generated, thereby improving the efficiency of the RF power amplifier 3, and effectively suppressing the second harmonic, the third harmonic, and the higher harmonic, and reducing the harmonic distortion of the RF power amplifier.
  • the present invention provides a radio frequency power supply for improving the efficiency of a radio frequency power amplifier, the radio frequency power supply comprising: a radio frequency signal generator, the radio frequency signal generator transmitting a radio frequency signal; a front end driver, an input end of the front end driver Connecting the output of the radio frequency signal generator; the RF power amplifier, the input end of the radio frequency power amplifier is connected to the output end of the front end driver; the harmonic network, the input end of the harmonic network and the radio frequency power amplifier An output connection, a matching network, an input end of the matching network is connected to an output end of the radio frequency power amplifier; a radio frequency power detector, an input end of the radio frequency power detector and an output end of the matching network Power supply line, said The power supply line is respectively connected to the radio frequency signal generator, the front end driver, the radio frequency power amplifier, the harmonic network, and the radio frequency power detector.
  • the invention passes through: a second harmonic low resistance network, an input end of the second harmonic low resistance network is connected to an output end of the radio frequency power amplifier, and an output end of the second harmonic low resistance network is grounded a high-order harmonic low-resistance network, an input end of the higher harmonic low-resistance network is connected to an output end of the radio frequency power amplifier, and an output end of the higher harmonic low-resistance network is grounded;
  • a second harmonic low resistance network is connected in parallel with the higher harmonic low resistance network to the output end of the radio frequency power amplifier to form a third harmonic high resistance network.
  • the invention solves the technical problem that the efficiency of the radio frequency power amplifier is low and the interference of the harmonic component is easy to occur in the prior art, and the second harmonic, the third harmonic and the higher harmonic can be suppressed, and the efficiency of the radio frequency power amplifier is greatly improved.
  • the second harmonic low-resistance network of the present invention further includes: a first resistor, the input end of the first resistor is connected in series with the output end of the second harmonic low-resistance network; An input end of the first capacitor is connected in series with an output end of the first resistor, an output end of the first capacitor is grounded, and the higher harmonic low resistance network includes: a second capacitor, the second capacitor and The high-order harmonic low-resistance network is grounded in parallel, which solves the technical problem that the efficiency of the radio frequency power amplifier is low and the interference of harmonic components is easy to occur in the prior art, and further improves the efficiency of the radio frequency power amplifier and reduces the efficiency.
  • the technical effect of harmonic distortion of RF power amplifiers is provided.

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  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

一种提高射频功率放大器(3)效率的射频电源,涉及半导体工艺设备技术领域,所述射频电源包括:通过射频信号发生器(1)获得射频信号;所述射频信号通过前端驱动器(2)发射给射频功率放大器(3),将所述射频信号放大后输出;通过谐波网络(4)接收所述射频功率放大器(3)输出的所述射频信号,对谐波进行抑制;通过匹配网络(5)接收所述谐波网络(4)输出的所述射频信号后,将所述射频信号输出;通过射频功率检测器(6)接收所述射频信号,对所述射频信号进行检测后,将所述射频信号输出,通过供电线路(7)分别向上述模块输送电流。解决了现有技术中射频功率放大器(3)的效率低下,易出现谐波分量干扰的技术问题,达到了大幅提高射频功率放大器(3)的效率,降低谐波失真的技术效果。

Description

一种提高射频功率放大器效率的射频电源 技术领域
本发明涉及半导体工艺设备技术领域,特别涉及一种提高射频功率放大器效率的射频电源。
背景技术
射频电源是用于产生射频功率信号的射频电源,属于半导体工艺设备的核心部件,所有产生等离子体进行材料处理的设备都需要射频电源提供能量。
射频功率放大器是发送设备的重要组成部分。射频功率放大器的主要技术指标是输出功率与效率。
但本申请发明人在实现本申请实施例中发明技术方案的过程中,发现上述技术至少存在如下技术问题:
现有技术中的射频功率放大器的效率不高,而且容易出现谐波分量的干扰的技术问题
发明内容
本发明通过提供一种提高射频功率放大器效率的射频电源,解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
一种提高射频功率放大器效率的射频电源,所述射频电源包括:射频信号发生器,所述射频信号发生器发射射频信号;前端驱动器,所述前端驱动器的输入端与所述射频信号发生器的输出端连接,接收所述射频信号发生器发射的射频信号;射频功率放大器,所述射频功率放大器的输入端与所述前端驱动器的输出端连接,接收所述前端驱动器发射的射频信号,将所述信号放大后输出; 谐波网络,所述谐波网络的输入端与所述射频功率放大器的输出端连接,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的谐波进行抑制;匹配网络,所述匹配网络的输入端与所述射频功率放大器的输出端连接,接收所述射频功率放大器输出的所述射频信号后,将所述射频信号输出;射频功率检测器,所述射频功率检测器的输入端与所述匹配网络的输出端与连接,接收所述匹配网络输出的所述射频信号,对所述射频信号进行检测后,将所述射频信号输出;供电线路,所述供电线路分别与所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述匹配网络,所述射频功率检测器连接,分别向所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述匹配网络,所述射频功率检测器输送电流。
优选的,所述谐波网络还包括:二次谐波低阻网络,所述二次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述二次谐波低阻网络的输出端接地,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的二次谐波进行抑制;
优选的,所述谐波网络还包括:高次谐波低阻网络,所述高次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述高次谐波低阻网络的输出端接地,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的高次谐波进行抑制;
优选的,所述谐波网络还包括:所述二次谐波低阻网络与所述高次谐波低阻网络并联连接到所述射频功率放大器的输出端,形成三次谐波高阻网络,对所述射频信号的三次谐波进行抑制。
优选的,所述二次谐波低阻网络还包括:第一电阻,所述第一电阻的输入端与所述二次谐波低阻网络的输出端串联连接;第一电容,所述第一电容的输入端与所述第一电阻的输出端串联连接,诉讼湖第一电容的输出端接地;其中,所述第一电阻与所述第一电容形成串联谐振网络,降低所述二次谐波的输出阻 抗。
优选的,所述高次谐波低阻网络还包括:第二电容,所述第二电容与所述高次谐波低阻网络并联接地,降低所述高次谐波的输出阻抗。
本发明中提供的一个或多个技术方案,至少具有如下技术效果或优点:
1.本发明提供的一种提高射频功率放大器效率的射频电源,通过射频信号发生器获得射频信号;所述射频信号通过前端驱动器发射给射频功率放大器,将所述射频信号放大后输出;通过谐波网络接收所述射频功率放大器输出的所述射频信号,对谐波进行抑制;通过匹配网络接收所述谐波网络输出的所述射频信号后,将所述射频信号输出;通过射频功率检测器接收所述射频信号,对所述射频信号进行检测后,将所述射频信号输出,通过供电线路分别向上述模块输送电流。解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
2.本发明通过二次谐波低阻网络与高次谐波低阻网络并联连接到射频功率放大器的输出端,形成三次谐波高阻网络。解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到能够抑制二次谐波、三次谐波以及高次谐波,大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
3.本发明中二次谐波低阻网络包括第一电阻、第一电容,高次谐波低阻网络包括第二电容,解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,进一步达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,而可依照说明书的内容予以实施,并且为了让本发明的上述和其它目的、 特征和优点能够更明显易懂,以下特举本发明的具体实施方式。
附图说明
为了更清楚地说明本发明中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1为本发明提供的一种提高射频功率放大器效率的射频电源的结构示意图。
附图标号说明:射频信号发生器1,前端驱动器2,射频功率放大器3,谐波网络4,二次谐波低阻网络41,高次谐波低阻网络42,匹配网络5,射频功率检测器6,供电线路7。
具体实施方式
本发明实施例提供的一种提高射频功率放大器效率的射频电源,所述射频电源包括:通过射频信号发生器获得射频信号;所述射频信号通过前端驱动器发射给射频功率放大器,将所述射频信号放大后输出;通过谐波网络接收所述射频功率放大器输出的所述射频信号,对谐波进行抑制;通过匹配网络接收所述谐波网络输出的所述射频信号后,将所述射频信号输出;通过射频功率检测器接收所述射频信号,对所述射频信号进行检测后,将所述射频信号输出,通过供电线路分别向上述模块输送电流。解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例,然而应当理解,可以以各种形式实现本公开而不应被 这里阐述的实施例所限制。相反,提供这些实施例是为了能够更透彻地理解本公开,并且能够将本公开的范围完整的传达给本领域的技术人员。
实施例一
图1为本发明提供的一种提高射频功率放大器效率的射频电源的结构示意图。如图1所示,所述射频电源包括:
射频信号发生器1,所述射频信号发生器1发射射频信号。
具体而言,射频信号是经过调制的,拥有一定发射频率的电波,而射频信号发生器1是信号发生器的一种。信号发生器按信号源有很多种分类方法,其中一种方法可分为混和信号源和逻辑信号源两种。其中混和信号源主要输出模拟波形;逻辑信号源输出数字码形。混和信号源又可分为函数信号发生器和任意波形/函数发生器,其中函数信号发生器输出标准波形,如正弦波、方波等,任意波/函数发生器输出用户自定义的任意波形;逻辑信号发生器又可分为脉冲信号发生器和码型发生器,其中脉冲信号发生器驱动较小个数的方波或脉冲波输出,码型发生器生成许多通道的数字码型。如泰克生产的AFG3000系列就包括函数信号发生器、任意波形/函数信号发生器、脉冲信号发生器的功能。另外,信号源还可以按照输出信号的类型分类,如射频信号发生器、扫描信号发生器、频率合成器、噪声信号发生器、脉冲信号发生器等等。信号源也可以按照使用频段分类,不同频段的信号源对应不同应用领域。
前端驱动器21,所述前端驱动器21的输入端与所述射频信号发生器1的输出端连接,接收所述射频信号发生器1发射的射频信号。
具体而言,所述前端驱动器21用于将所述射频信号发生器1发出的信号,使其能够保证在发送给射频功率放大器22时,所述信号不被衰减,与所述射频信号发生器1发出时保持一致。
射频功率放大器22,所述射频功率放大器22的输入端与所述前端驱动器 21的输出端连接,接收所述前端驱动器发射的射频信号,将所述信号放大后输出。
具体而言,射频功率放大器22是各种无线发射机的重要组成部分。在发射机的前级电路中,调制振荡电路所产生的射频信号功率很小,需要经过一系列的放大一缓冲级、中间放大级、末级功率放大级,获得足够的射频功率以后,才能馈送到天线上辐射出去。为了获得足够大的射频输出功率,必须采用射频功率放大器22。
谐波网络4,所述谐波网络4的输入端与所述射频功率放大器3的输出端连接,接收所述射频功率放大器3输出的所述射频信号,对所述射频信号的谐波进行抑制。
进一步的,所述谐波网络4具体包括:二次谐波低阻网络41,所述二次谐波低阻网络41的输入端与所述射频功率放大器3的输出端连接,所述二次谐波低阻网络41的输出端接地,接收所述射频功率放大器3输出的所述射频信号,对所述射频信号的二次谐波进行抑制;高次谐波低阻网络42,所述高次谐波低阻网络42的输入端与所述射频功率放大器3的输出端连接,所述高次谐波低阻网络42的输出端接地,接收所述射频功率放大器3输出的所述射频信号,对所述射频信号的高次谐波进行抑制;其中,所述二次谐波低阻网络41与所述高次谐波低阻网络42并联连接到所述射频功率放大器3的输出端,形成三次谐波高阻网络,对所述射频信号的三次谐波进行抑制。
具体而言,所述射频功率放大器3输出的射频信号会产生不同频率的谐波分量,所述谐波分量包括二次谐波,高次谐波,三次谐波等,不同频率的谐波会对所述射频信号产生干扰,为了降低所述谐波分量,所述射频功率放大器输出端设置所述谐波网络4,所述谐波网络4包括,所述二次谐波低阻网络41,通过降低所述输出匹配网络的二次谐波阻抗,从而抑制所述射频功率放大器产生的二次谐波,所述高次谐波网络42,通过降低所述输出匹配网络的高次谐 波阻抗,从而抑制所述射频功率放大器产生的高次谐波,所述三次谐波高祖网络是所述二次谐波低阻网络与所述高次谐波低阻网络并联连接到所述射频功率放大器的输出端构成的,使得所述三次谐波阻抗增高,从而抑制所述射频功率放大器产生的三次谐波,从而达到大幅度的提高射频功率放大器3的效率,降低射频功率放大器3的谐波失真的技术效果。
进一步的,所述二次谐波低阻网络41还包括:第一电阻,所述第一电阻的输入端与所述二次谐波低阻网络的输出端串联连接;第一电容,所述第一电容的输入端与所述第一电阻的输出端串联连接,所述第一电容的输出端接地,其中,所述第一电阻与所述第一电容形成串联谐振网络,降低所述二次谐波的输出阻抗。
具体而言,所述二次谐波低阻网络41具体为:所述二次谐波低阻网络41通过所述第一电容与所述第一电阻串联接地,形成LC串联谐振网络,所述LC串联谐振网络就是在电阻、电感及电容所组成的串联电路内,当容抗与感抗相等时电路中的电压与电流的相位相同,电路呈现纯电阻性。当电路发生串联谐振时,电路中总阻抗最小,电流将达到最大值。谐振频率在二次谐波,使得射频功率放大器3的输出匹配网络在二次谐波的输出阻抗达到最低值。
进一步的,所述高次谐波低阻网络42还包括:第二电容,所述第二电容与所述高次谐波低阻网络并联接地,,降低所述高次谐波的输出阻抗。
具体而言,所述高次谐波低阻网络42通过所述第二电容直接并联接地,所述第二电容用于消除所述射频功率放大器输出的高次谐波,使得所述射频功率放大器3的输出匹配网络在高次谐波的输出阻抗达到最低值。
匹配网络5,所述匹配网络5的输入端与所述射频功率放大器3的输出端连接,接收所述射频功率放大器输出的所述射频信号后,将所述射频信号输出。
射频功率检测器6,所述射频功率检测器6的输入端与所述匹配网络5的输出端与连接,接收所述匹配网络5输出的所述射频信号,对所述射频信号进 行检测后,将所述射频信号输出。
具体而言,为了确保所述射频功率放大器3输出信号的效率得到明显提高,以及所述射频功率放大器3输出的谐波得到有效抑制,所述射频功率检测器3接收所述匹配网络5发送的信号,对所述信号进行检测,再将所述信号输出。
供电线路7,所述供电线路7分别与所述射频信号发生器1、所述前端驱动器2、所述射频功率放大器3、所述谐波网络4、所述匹配网络5,所述射频功率检测器6连接,分别向所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述匹配网络,所述射频功率检测器输送电流。
总而言之,本发明在射频功率放大器3的输出端加入二次谐波低阻网络41和高次谐波低阻网络42,使得射频功率放大器3输出匹配网络5的二次谐波与高次谐波阻抗很低,而三次谐波阻抗很高,射频功率放大器3输出端电压被整形为方波,输出端电流被整形为半波,因此无论在二次谐波或三次谐波或高次谐波时,频点均无谐波功率产生,从而达到提高了射频功率放大器3的效率,并且有效的抑制了二次谐波、三次谐波以及高次谐波,降低了射频功率放大器的谐波失真的技术效果。
本发明中提供的一个或多个技术方案,至少具有如下技术效果或优点:
1.本发明提供的一种提高射频功率放大器效率的射频电源,所述射频电源包括:射频信号发生器,所述射频信号发生器发射射频信号;前端驱动器,所述前端驱动器的输入端与所述射频信号发生器的输出端连接;射频功率放大器,所述射频功率放大器的输入端与所述前端驱动器的输出端连接;谐波网络,所述谐波网络的输入端与所述射频功率放大器的输出端连接;匹配网络,所述匹配网络的输入端与所述射频功率放大器的输出端连接;射频功率检测器,所述射频功率检测器的输入端与所述匹配网络的输出端与连接;供电线路,所述 供电线路分别与所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述射频功率检测器连接。解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
2.本发明通过:二次谐波低阻网络,所述二次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述二次谐波低阻网络的输出端接地;高次谐波低阻网络,所述高次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述高次谐波低阻网络的输出端接地;其中,所述二次谐波低阻网络与所述高次谐波低阻网络并联连接到所述射频功率放大器的输出端,形成三次谐波高阻网络。解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,达到能够抑制二次谐波、三次谐波以及高次谐波,大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
3.本发明通过所述二次谐波低阻网络还包括:第一电阻,所述第一电阻的输入端与所述二次谐波低阻网络的输出端串联连接;第一电容,所述第一电容的输入端与所述第一电阻的输出端串联连接,所述第一电容的输出端接地,所述高次谐波低阻网络包括:第二电容,所述第二电容与所述高次谐波低阻网络并联接地,解决了现有技术中射频功率放大器的效率低下,容易出现谐波分量的干扰的技术问题,进一步达到了大幅度的提高射频功率放大器的效率,降低射频功率放大器的谐波失真的技术效果。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。
最后所应说明的是,以上具体实施方式仅用以说明本发明的技术方案而非限制,尽管参照实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者等同替换,而不脱离本发明技术方案的精神和范围,其均应涵盖在本发明的权利要求范围当中。

Claims (6)

  1. 一种提高射频功率放大器效率的射频电源,其特征在于,所述射频电源包括:
    射频信号发生器,所述射频信号发生器发射射频信号;
    前端驱动器,所述前端驱动器的输入端与所述射频信号发生器的输出端连接,接收所述射频信号发生器发射的射频信号;
    射频功率放大器,所述射频功率放大器的输入端与所述前端驱动器的输出端连接,接收所述前端驱动器发射的射频信号,接收所述前端驱动器发射的射频信号,将所述信号放大后输出;
    谐波网络,所述谐波网络的输入端与所述射频功率放大器的输出端连接,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的谐波进行抑制;
    匹配网络,所述匹配网络的输入端与所述射频功率放大器的输出端连接,接收所述射频功率放大器输出的所述射频信号后,将所述射频信号输出;
    射频功率检测器,所述射频功率检测器的输入端与所述匹配网络的输出端与连接,接收所述匹配网络输出的所述射频信号,对所述射频信号进行检测后,将所述射频信号输出;
    供电线路,所述供电线路分别与所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述匹配网络,所述射频功率检测器连接,分别向所述射频信号发生器、所述前端驱动器、所述射频功率放大器、所述谐波网络、所述匹配网络,所述射频功率检测器输送电流。
  2. 如权利要求1所述的射频电源,其特征在于,所述谐波网络还包括:
    二次谐波低阻网络,所述二次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述二次谐波低阻网络的输出端接地,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的二次谐波进行抑制。
  3. 如权利要求1所述的射频电源,其特征在于,所述谐波网络还包括:
    高次谐波低阻网络,所述高次谐波低阻网络的输入端与所述射频功率放大器的输出端连接,所述高次谐波低阻网络的输出端接地,接收所述射频功率放大器输出的所述射频信号,对所述射频信号的高次谐波进行抑制。
  4. 如权利要求1所述的射频电源,其特征在于,所述谐波网络还包括:所述二次谐波低阻网络与所述高次谐波低阻网络并联连接到所述射频功率放大器的输出端,形成三次谐波高阻网络,对所述射频信号的三次谐波进行抑制。
  5. 如权利要求2所述的射频电源,其特征在于,所述二次谐波低阻网络还包括:
    第一电阻,所述第一电阻的输入端与所述二次谐波低阻网络的输出端串联连接;
    第一电容,所述第一电容的输入端与所述第一电阻的输出端串联连接,诉讼湖第一电容的输出端接地;
    其中,所述第一电阻与所述第一电容形成串联谐振网络,降低所述二次谐波的输出阻抗。
  6. 如权利要求2所述的射频电源,其特征在于,所述高次谐波低阻网络还包括:
    第二电容,所述第二电容与所述高次谐波低阻网络并联接地,降低所述高次谐波的输出阻抗。
PCT/CN2017/101524 2017-09-13 2017-09-13 一种提高射频功率放大器效率的射频电源 WO2019051660A1 (zh)

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Publication number Priority date Publication date Assignee Title
JP2001274629A (ja) * 2000-03-24 2001-10-05 Sharp Corp 周波数逓倍器及びそれを用いた送受信装置
CN103855911A (zh) * 2012-11-28 2014-06-11 中国科学院微电子研究所 射频信号相位可数字式调节的射频电源
CN103973234A (zh) * 2013-01-31 2014-08-06 沈阳中科微电子有限公司 一种射频功率放大器谐波抑制组合电路
CN104579189A (zh) * 2015-02-04 2015-04-29 广东工业大学 一种改善射频功率放大器谐波性能的电路结构
CN104716906A (zh) * 2015-04-03 2015-06-17 广东工业大学 一种提高宽带射频功率放大器效率的方法及电路结构

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JP2001274629A (ja) * 2000-03-24 2001-10-05 Sharp Corp 周波数逓倍器及びそれを用いた送受信装置
CN103855911A (zh) * 2012-11-28 2014-06-11 中国科学院微电子研究所 射频信号相位可数字式调节的射频电源
CN103973234A (zh) * 2013-01-31 2014-08-06 沈阳中科微电子有限公司 一种射频功率放大器谐波抑制组合电路
CN104579189A (zh) * 2015-02-04 2015-04-29 广东工业大学 一种改善射频功率放大器谐波性能的电路结构
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