WO2017197954A1 - 一种用于卫星导航及授时的低噪声功率放大器及使用方法 - Google Patents

一种用于卫星导航及授时的低噪声功率放大器及使用方法 Download PDF

Info

Publication number
WO2017197954A1
WO2017197954A1 PCT/CN2017/075379 CN2017075379W WO2017197954A1 WO 2017197954 A1 WO2017197954 A1 WO 2017197954A1 CN 2017075379 W CN2017075379 W CN 2017075379W WO 2017197954 A1 WO2017197954 A1 WO 2017197954A1
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
switch
noise power
input
satellite navigation
Prior art date
Application number
PCT/CN2017/075379
Other languages
English (en)
French (fr)
Inventor
刘波
Original Assignee
江苏指南针导航通信技术股份有限公司
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 江苏指南针导航通信技术股份有限公司 filed Critical 江苏指南针导航通信技术股份有限公司
Publication of WO2017197954A1 publication Critical patent/WO2017197954A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages

Definitions

  • the present invention relates to a low noise power amplifier, and more particularly to a low noise power amplifier for satellite navigation and timing and a method of using the same.
  • satellite navigation receiving devices including positioning, navigation, timing, etc.
  • the signal power to the receiving device is small, and the receiving antenna of the receiving device is usually It has a wide beam, in addition to receiving the required useful signals, it also induces other noise and unwanted signals around the receiving antenna.
  • These noise and unwanted signals can be regarded as interference for useful signals, and the composition is complex, including other Ordinary interference signals radiated by the device may also have malicious high-power interference signals, false deception interference signals, and the like.
  • the satellite navigation receiving device may lose the functions of positioning, timing, etc., and may be deceived to generate erroneous location and time information, which may have extremely adverse effects on important industry sectors, or even cause Serious consequences and major losses.
  • the low-noise power amplifier can only output the total received signal including the noise floor, external noise (all kinds of interference signals can be regarded as external noise) and the useful signal, and cannot separately output the low-noise power amplifier. Bottom noise.
  • Low noise power When the total received signal output by the amplifier is transmitted to the receiver through cables of different lengths and different attenuation amounts, the power of the total received signal received by the receiver has a large variation range, and it is difficult for the receiver to receive the total received signal according to the received signal. The amount of power is used to determine if there is interference.
  • the noise floor of the low-noise power amplifier can be separately output, and the output can include the noise floor and the external
  • the total received signal such as noise and received signals, so that the receiver at the next stage can accurately determine whether there is interference by detecting the noise power of the noise and the total received signal power, respectively.
  • the technical problem to be solved by the present invention is to provide a low-noise power amplifier for satellite navigation and timing and a method for using the same, which solves the problem that the low-noise power amplifier in the prior art cannot be quickly detected and accurately determined because the background noise cannot be separately output. Is there a problem with the interference signal?
  • a technical solution adopted by the present invention is to provide a low noise power amplifier for satellite navigation and timing, comprising an antenna input end, a radio frequency signal output end and a power input end, and the low noise power amplifier includes a matching resistor, a single pole double throw RF switch, a radio frequency amplifier and a microprocessor, wherein an input of the single pole double throw RF switch is electrically connected to the antenna input, and the other input of the single pole double throw RF switch is electrically connected to the matching resistor Connected, the common output of the single-pole double-throw RF switch is electrically connected to the input end of the RF amplifier, and the output of the RF amplifier is electrically connected to the RF signal output, and the single-pole double-throw RF switch is electrically connected to the microprocessor. And controlled by the microprocessor, the power input is connected to the single-pole double-throw RF switch, the RF amplifier and the microprocessor.
  • the resistance of the matching resistor is the same as the input characteristic impedance of the antenna input.
  • the RF signal output end and the power input end are the same dual signal port, and the dual signal port is electrically connected to the mixed signal output end of a feed network, and the RF signal input end of the feed network is connected to the RF amplifier.
  • the DC power output of the feed network is connected to the single pole double throw RF switch, the RF amplifier and the microprocessor.
  • a capacitor is connected between the mixed signal output end of the feed network and the RF signal input terminal, and the hybrid of the feed network
  • An inductor is connected between the signal output end and the DC power output end, and the DC power output end is connected to an input end of a voltage regulator, and the output end of the voltage regulator is connected to the single-pole double-throw RF switch, the RF amplifier and the micro processing Device.
  • the single pole double throw RF switch is a monolithic integrated circuit RF switch having an insertion loss of less than 1 dB and an isolation greater than 30 dB.
  • the bandwidth is from 1 GHz to 2 GHz, and the operating frequency covers the center frequency of the satellite navigation signal received by the antenna externally connected to the antenna input.
  • the RF amplifier includes two cascaded amplifier assemblies, wherein the input of the first stage amplifier assembly and the single pole double throw RF switch The common output is electrically connected, the output of the first stage amplifier component is electrically connected to the input end of the second stage amplifier component, and the output end of the second stage amplifier component is connected to the RF signal input end of the feed network, first
  • the gain of the stage amplifier is greater than 18dB, the noise figure is less than 1dB, the gain of the second stage amplifier is greater than 20dB, the noise figure is lower than 4dB, and the output power of the 1dB compression point is not less than 0dBm.
  • a first vocal cord is cascaded between an input of the first stage amplifier assembly and a common output of the single pole double throw RF switch
  • a pass filter is coupled between the output of the first stage amplifier component and the input of the second stage amplifier component in series with a second band pass filter.
  • the invention also provides a method for using a low noise power amplifier for satellite navigation and timing, connecting the antenna input end of the low noise power amplifier to an external receiving The antenna, the RF signal output end is connected to the receiver through the RF cable, and the power input terminal is connected to the DC power source. After the power is turned on, the microprocessor controls the single-pole double-throw RF switch to connect the matching resistor and the RF amplifier.
  • the RF signal output end outputs the noise floor of the low noise power amplifier for satellite navigation and timing; after the delay is over, the microprocessor controls the single pole double throw RF switch, and disconnects the An electrical connection between the matching resistor and the RF amplifier turns on and maintains an electrical connection between the antenna input and the RF amplifier, and the RF signal output outputs a total received signal.
  • the delay time is from 1 second to 60 seconds.
  • the invention has the beneficial effects that: by setting a matching resistor, a single-pole double-throw RF switch, a radio frequency amplifier and a microprocessor in the low-noise power amplifier, the single-pole double-throw RF switch controlled by the microprocessor is respectively connected to the matching resistor and
  • the antenna input terminal is configured to measure the noise floor of the low noise power amplifier and the output power of the total received signal, and then use the difference change of the two powers to identify whether the interference signal exists in real time. In this way, independent measurement of the noise power of the background and the output power of the total received signal is realized, and the two power measurements can be automatically switched in real time without being affected by the ambient temperature, thereby improving the detection efficiency and being convenient to use.
  • 1 is a composition diagram of an embodiment of a low noise power amplifier for satellite navigation and timing of the present invention
  • FIG. 2 is a composition diagram of another embodiment of a low noise power amplifier for satellite navigation and timing according to the present invention.
  • FIG. 3 is a composition diagram of a feed network in a low noise power amplifier for satellite navigation and timing
  • FIG. 4 is a flow chart of a method for using a low noise power amplifier for satellite navigation and timing according to the present invention.
  • the low noise power amplifier 10 includes an antenna input terminal 11, a radio frequency signal output terminal 16, and a power supply input terminal 17.
  • the antenna input terminal 11 is used for connecting a satellite navigation signal receiving antenna, for example, a microstrip antenna for receiving a GPS L1 frequency point signal, and the DA1575S10T4 microstrip antenna produced by Zhangqin Bonded Area Can Qin Microwave Technology Co., Ltd. can be selected; the RF signal output terminal 16 is used.
  • the RF signal amplified by the low noise power amplifier 10 is output to the receiver of the subsequent stage through the RF cable; the power input terminal 17 is used to connect the DC power source, thereby supplying power to the low noise power amplifier 10.
  • a matching resistor 12 Inside the low noise power amplifier 10, a matching resistor 12, a single pole double throw RF switch 13, a radio frequency amplifier 15 and a microprocessor 14 are further included. As can be seen from FIG. 1 , an input end 131 of the single-pole double-throw RF switch 13 is electrically connected to the antenna input end 11 , and the other input end 132 of the single-pole double - throw RF switch 13 is electrically connected to the matching resistor 12 .
  • the common output 133 of the single-pole double-throw RF switch 13 is electrically connected to the input end 151 of the RF amplifier 15, and the output 152 of the RF amplifier 15 is electrically connected to the RF signal output terminal 16.
  • the single-pole double-throw RF switch 13 and the The microprocessor 14 is electrically connected and controlled by the microprocessor 14, and the power input terminal 17 is connected to the single-pole double-throw RF switch 13, the RF amplifier 15 and the microprocessor 14. Electricity.
  • the circuit structure of the single-pole double-throw RF switch 13 and the matching resistor 12 is adopted, after the low-noise power amplifier 10 is powered up, the RF switch 13 is controlled by the microprocessor 14, and the matching resistor 12 and the RF switch 13 are matched.
  • the input terminal 132 is turned on, and at the same time, the antenna input terminal 11 is disconnected from the input terminal 131 of the radio frequency switch 13, so that the low noise power amplifier 10 outputs only the noise floor.
  • the RF switch 13 is controlled to connect the antenna input terminal 11 to the input terminal 131 of the RF switch 13, and at the same time, the matching resistor 12 is disconnected from the input terminal 132 of the RF switch 13, and the low noise power amplifier 10 will output a noise floor.
  • the total received signal including the external noise and satellite signals received by the antenna input terminal 11.
  • the resistance value of the matching resistor 12 is the same as the input characteristic impedance value of the antenna input terminal 11.
  • the input characteristic impedance value of the antenna input terminal 11 is typically 50 ohms
  • the resistance value of the matching resistor 12 is also 50 ohms.
  • the single-pole double-throw RF switch 13 is selected instead of the relay as the two-way RF switching device, mainly based on the size of the RF switch is smaller than the relay, and the price is also cheaper, although it brings a certain insertion loss. However, it has little impact on the overall performance, and can also compensate for the insertion loss through the latter stage RF amplifier.
  • the microprocessor can control the RF switch to convert the noise floor of the low noise power amplifier separately, and can output the included noise.
  • the total received signal including the bottom noise, the external noise, and the received signal, thereby being able to accurately determine whether or not the interference signal exists by detecting the change in the noise power of the background and the power of the total received signal, respectively. This is because after obtaining the noise power measurement value, the external noise and the received signal power are normally within a reasonable range, so the total output power minus the noise power after the noise power is also It should be within this reasonable range. If the total output power minus the noise power after the noise power is significantly out of the reasonable range, it can be judged that there is an interference signal.
  • the low noise power amplifier 20 of FIG. 2 includes an antenna input terminal 21, a matching resistor 22, a single pole double throw RF switch 23, a radio frequency amplifier 25, and a microprocessor 24, which are corresponding to those in FIG. Have the same function, no longer repeat them.
  • the difference is that the RF signal output terminal 16 and the power input terminal 17 in FIG. 1 are the same dual signal port 27 in FIG.
  • the dual signal port 27 is electrically connected to the mixed signal output terminal 263 of a feed network 26,
  • the RF signal input 261 of the feed network 26 is coupled to the output 252 of the RF amplifier 25, and the DC power output 262 of the feed network 26 is coupled to the single pole double throw RF switch 23, the RF amplifier 25 and the microprocessor 24.
  • the RF signal output terminal 16 and the power input terminal 17 can be combined into one, which reduces the number of interface terminals of the low noise power amplifier and is more convenient to use.
  • FIG. 3 a preferred embodiment of the feed network 26 in FIG. 2 is shown in FIG. 3: a capacitor 37 is connected between the mixed signal output terminal 363 of the feed network 36 and the RF signal input terminal 361, and the feed network 36 is connected. An inductor 38 is connected between the mixed signal output terminal 363 and the DC power output terminal 362. Further, at the DC power output 362, an input terminal 391 of a voltage regulator 39 is connected, and the output terminal 392 of the voltage regulator is connected to a single-pole double-throw RF switch, a radio frequency amplifier and a microprocessor.
  • the capacitor 37 can be a chip ceramic capacitor of NPO material having a capacitance of more than 100 pF, an error of not more than 5%, and a withstand voltage of not less than 50 V, such as CC41-0402-CG-50V manufactured by Fujian Torch Electronic Technology Co., Ltd.
  • inductor 38 can use inductors with an inductance of not less than 47nH, an error of no more than 20%, an allowable maximum current of not less than 100mA, and a self-resonant frequency of not less than 2000MHz, such as MURATA's LQW18AN47NJ00D chip inductor; regulator 39 selects a low-dropout linear regulator with an output current greater than 75mA and a dropout voltage of no more than 100mV, such as TI's TPS73130DBVR regulator.
  • the matching resistor can be selected to have a resistance of 49.9 ohms and accuracy.
  • the circuit RF switch has an insertion loss of less than 1 dB, an isolation of more than 30 dB, and a bandwidth of 1 GHz to 2 GHz.
  • the operating frequency covers a center frequency of a satellite navigation signal received by an antenna externally connected to the input end of the antenna.
  • a single-pole, double-throw RF switch can use an RF switch with a bandwidth of 1 to 2 GHz, an insertion loss of less than 1 dB, and an isolation greater than 30 dB, such as the TQP4M0010 manufactured by TriQuint Semiconductor.
  • the radio frequency amplifier may include two cascaded An amplifier assembly, wherein an input of the first stage amplifier component is electrically coupled to a common output of the single pole double throw RF switch, and an output of the first stage amplifier component is electrically coupled to an input of the second stage amplifier component, the The output of the secondary amplifier component is connected to the RF signal input of the feed network.
  • the gain of the first stage amplifier is greater than 18 dB, and the noise figure is less than 1 dB, such as the MAX2659 low noise GPS amplifier of MAXIM; the gain of the second stage amplifier is greater than 20 dB.
  • the noise figure is lower than 4dB, and the output power of the 1dB compression point is not less than 0dBm, such as AVAGO's ABA31563 low noise amplifier.
  • the total gain of the entire RF amplifier is around 35 dB.
  • a first band-pass filter with low insertion loss may be connected between the input of the first-stage amplifier component and the common output of the single-pole double-throw RF switch, such as TriQuint Semiconductor.
  • the company produces 856561 and other GPS L1 frequency point surface wave bandpass filters; a second bandpass with a narrow bandwidth is connected between the output of the first stage amplifier component and the input of the second stage amplifier component.
  • Filters such as the GPS L1 frequency point surface wave bandpass filter such as the TA0664A produced by TAISAW.
  • the present invention also provides a method of using the above-described low noise power amplifier for satellite navigation and timing.
  • the antenna input end of the low noise power amplifier is connected to an external receiving antenna, and the RF signal output end is connected to the receiver through a radio frequency cable, and the power input end Connect to DC power.
  • the microprocessor controls the single-pole double-throw RF switch to turn on the electrical connection between the matching resistor and the RF amplifier, and the RF signal output is delayed.
  • the noise floor of the low noise power amplifier for satellite navigation and timing is output.
  • step S12 after the delay is over, the microprocessor controls the single-pole double-throw RF switch, disconnects the electrical connection between the matching resistor and the RF amplifier, and turns on and maintains the electrical connection between the antenna input and the RF amplifier.
  • the RF signal output terminal outputs the total received signal power.
  • the delay time is from 1 second to 60 seconds, which is not shorter than the time required for the receiver to measure the noise power of the background.
  • the present invention provides a low noise power amplifier for satellite navigation and timing and a method of using the same, by setting a matching resistor, a single pole double throw RF switch, a radio frequency amplifier and a microprocessor in the low noise power amplifier
  • the microprocessor-controlled single-pole double-throw RF switch is respectively connected to the matching resistor and the antenna input terminal to measure the noise power and the total received signal power of the low-noise power amplifier, and then use the difference between the two powers to change Real-time identification determines whether there is an interference signal.
  • independent measurement of the noise power and the total received signal power is realized, and the two power measurements can be automatically switched in real time, which is not affected by the ambient temperature, improves the detection efficiency, and is convenient to use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

一种用于卫星导航及授时的低噪声功率放大器（20）及其使用方法。通过在该低噪声功率放大器（20）设置匹配电阻（22）、单刀双掷射频开关（23）、射频放大器（25）和微处理器（24）的方式，由微处理器（24）控制单刀双掷射频开关（23）分别接入匹配电阻（22）和天线输入端（21），使该低噪声功率放大器（20）在不同的时间段内分别输出本底噪声，或者包含本底噪声、卫星信号和外部干扰在内的总接收信号，以便接收机利用本底噪声和总接收信号功率的差值变化来实时识别判断是否存在干扰信号。这种方式实现了对本底噪声功率和总接收信号功率的独立测量，不受环境温度的影响，提高了检测效率，方便使用。

Description

一种用于卫星导航及授时的低噪声功率放大器及使用方法 技术领域
本发明涉及一种低噪声功率放大器，特别是涉及一种用于卫星导航及授时的低噪声功率放大器及其使用方法。
背景技术
随着GPS和“北斗”卫星导航定位以及授时业务在我国的普遍应用，对国民经济有重要影响的行业部门，如通信、电力、交通、金融等，不仅对卫星导航定位及授时业务的精准性有较高要求，对其依赖性也大大增强，主要或完全通过卫星导航定位及授时来提供基础服务和技术支持，因此对卫星导航定位及授时业务的安全性提出了更高要求。
由于卫星导航接收设备(包括定位、导航、授时等功能)接收来自外层空间导航卫星发出的信号，这些信号经过长距离传输后，到达接收设备的信号功率很小，而接收设备的接收天线通常具有较宽的波束，除了接收所需的有用信号外，还会感应接收天线周围的其他噪声及无用信号，这些噪声和无用信号对于有用信号而言可以视为干扰，并且成分复杂，既包括其他设备辐射的普通干扰信号，还可能有恶意的大功率干扰信号、虚假欺骗干扰信号等。如果卫星导航接收设备被这些干扰信号侵入，则有可能丧失定位、授时等功能，也有可能被欺骗而产生错误的位置和时间信息，进而可能会对重要的行业部门产生极为不利的影响，甚至造成严重后果和重大损失。
现有技术中，低噪声功率放大器只能输出包含本底噪声、外部噪声(各类干扰信号均可视为外部噪声)和有用信号在内的总接收信号，不能单独输出低噪声功率放大器的本底噪声。而低噪声功率 放大器输出的总接收信号再经过不同长度、不同衰减量的电缆传输到接收机时，接收机收到的总接收信号的功率存在较大的变化范围，接收机很难根据接收到的总接收信号功率的大小来判断是否存在干扰。
基于上述原因，有必要提供一种用于卫星导航及授时的低噪声功率放大器及其使用方法，由此既能够单独输出该低噪声功率放大器的本底噪声，又能够输出包含本底噪声、外部噪声和接收信号在内的总接收信号，以便后一级接收机通过分别检测本底噪声功率和总接收信号功率来准确判断识别是否存在干扰。
发明内容
本发明主要解决的技术问题是提供一种用于卫星导航及授时的低噪声功率放大器及其使用方法，解决现有技术中低噪声功率放大器因不能单独输出本底噪声而难以快速检测、准确判别是否存在干扰信号的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种用于卫星导航及授时的低噪声功率放大器，包括天线输入端、射频信号输出端和电源输入端，该低噪声功率放大器包括匹配电阻、单刀双掷射频开关、射频放大器和微处理器，该单刀双掷射频开关的一个输入端与该天线输入端电连接，该单刀双掷射频开关的另一个输入端与该匹配电阻电连接，该单刀双掷射频开关的公共输出端与该射频放大器的输入端电连接，该射频放大器的输出端与该射频信号输出端电连接，该单刀双掷射频开关与该微处理器电连接并受该微处理器控制，该电源输入端连接该单刀双掷射频开关、射频放大器和微处理器。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实施例中，该匹配电阻的阻值与该天线输入端的输入特性阻抗值相同。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实 施例中，该射频信号输出端和电源输入端为同一个双信号端口，该双信号端口与一个馈电网络的混合信号输出端电连接，该馈电网络的射频信号输入端连接该射频放大器的输出端，该馈电网络的直流电源输出端连接该单刀双掷射频开关、射频放大器和微处理器。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实施例中，该馈电网络的该混合信号输出端与该射频信号输入端之间连接有电容器，该馈电网络的该混合信号输出端与该直流电源输出端之间连接有电感器，该直流电源输出端连接一个稳压器的输入端，该稳压器的输出端连接该单刀双掷射频开关、射频放大器和微处理器。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实施例中，该单刀双掷射频开关为单片集成电路射频开关，该集成电路射频开关的插入损耗小于1dB，隔离度大于30dB，带宽为1GHz～2GHz，工作频率涵盖该天线输入端外部连接的天线所接收的卫星导航信号的中心频率。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实施例中，该射频放大器包括两个级联的放大器组件，其中，第一级放大器组件的输入端与该单刀双掷射频开关的公共输出端电连接，该第一级放大器组件的输出端与第二级放大器组件的输入端电连接，该第二级放大器组件的输出端连接该馈电网络的射频信号输入端，第一级放大器的增益大于18dB，噪声系数低于1dB，第二级放大器的增益大于20dB，噪声系数低于4dB，1dB压缩点的输出功率不小于0dBm。
在本发明用于卫星导航及授时的低噪声功率放大器的另一个实施例中，在该第一级放大器组件的输入端与该单刀双掷射频开关的公共输出端之间串接第一声带通滤波器，在该第一级放大器组件的输出端与第二级放大器组件的输入端之间串接第二带通滤波器。
本发明还提供了一种用于卫星导航及授时的低噪声功率放大器的使用方法，将上述低噪声功率放大器的天线输入端连接外部接收 天线，射频信号输出端通过射频电缆连接接收机，电源输入端接入直流电源，开机加电后，该微处理器控制该单刀双掷射频开关，接通该匹配电阻与该射频放大器之间的电连接，经延时，该射频信号输出端输出该用于卫星导航及授时的低噪声功率放大器的本底噪声；延时结束后，该微处理器控制该单刀双掷射频开关，断开该匹配电阻与该射频放大器之间的电连接，接通并保持该天线输入端与该射频放大器之间的电连接，该射频信号输出端输出总接收信号。
在本发明用于卫星导航及授时的低噪声功率放大器使用方法的另一个实施例中，该延时时长为1秒～60秒。
本发明的有益效果是：通过在该低噪声功率放大器中设置匹配电阻、单刀双掷射频开关、射频放大器和微处理器的方式，由微处理器控制单刀双掷射频开关分别接入匹配电阻和天线输入端，以便接收机测量该低噪声功率放大器的本底噪声和总接收信号的输出功率，再用这两个功率的差值变化来实时识别判断是否存在干扰信号。这种方式实现了对本底噪声功率和总接收信号输出功率的独立测量，并且，这两种功率测量可以实时自动进行切换，不受环境温度的影响，提高了检测效率，方便使用。
附图说明
图1是本发明用于卫星导航及授时的低噪声功率放大器一实施例的组成图；
图2是本发明用于卫星导航及授时的低噪声功率放大器另一实施例的组成图；
图3是本发明用于卫星导航及授时的低噪声功率放大器中馈电网络组成图；
图4是本发明用于卫星导航及授时的低噪声功率放大器使用方法流程图。
具体实施方式
为了便于理解本发明，下面结合附图和具体实施例，对本发明进行更详细的说明。附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本说明书所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，除非另有定义，本说明书所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是用于限制本发明。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
下面结合附图，对本发明的各实施例进行详细说明。
图1是本发明用于卫星导航及授时的低噪声功率放大器一实施例的组成图。在图1中，该低噪声功率放大器10包括天线输入端11、射频信号输出端16和电源输入端17。其中，天线输入端11用于连接卫星导航信号接收天线，例如接收GPS L1频点信号的微带天线，可选用张家港保税区灿勤微波技术有限公司生产的DA1575S10T4微带天线；射频信号输出端16用于将该低噪声功率放大器10放大输出的射频信号通过射频电缆输出给后一级的接收机；电源输入端17用于连接直流电源，由此向该低噪声功率放大器10供电。
进一步的，在该低噪声功率放大器10内部还包括匹配电阻12、单刀双掷射频开关13、射频放大器15和微处理器14。从图1可以看出，该单刀双掷射频开关13的一个输入端131与该天线输入端11电连接，该单刀双掷射频开关13的另一个输入端132与该匹配电阻12电连接，该单刀双掷射频开关13的公共输出端133与该射频放大器15的输入端151电连接，该射频放大器15的输出端152与该射频信号输出端16电连接，该单刀双掷射频开关13与该微处理器14电连接并受该微处理器14控制，该电源输入端17连接该单刀双掷射频开关13、射频放大器15和微处理器14，为其供 电。
由于采用了单刀双掷射频开关13和匹配电阻12这种电路结构，在该低噪声功率放大器10加电工作后，先通过微处理器14控制该射频开关13，将匹配电阻12与射频开关13的输入端132接通，同时，天线输入端11与射频开关13的输入端131断开，这样该低噪声功率放大器10只输出本底噪声。在微处理器14延时工作一段时间后(具体延时长度，根据后一级接收机测量噪声功率时间以及控制内部各器件工作时间精度而定，一般在1秒～60秒之间)，再控制射频开关13，将天线输入端11与射频开关13的输入端131接通，同时，匹配电阻12与射频开关13的输入端132断开，该低噪声功率放大器10将输出本底噪声、来自天线输入端11接收到的外部噪声和卫星信号在内的总接收信号。
优选的，匹配电阻12的电阻值与天线输入端11的输入特性阻抗值相同。例如，天线输入端11的输入特性阻抗值通常为50欧，匹配电阻12的电阻值也是50欧。另外，这里选用了单刀双掷射频开关13而不选用继电器作为两路射频切换的器件，主要是基于射频开关的体积尺寸要比继电器小，在价格上也较便宜，尽管带来一定的插入损耗，但对整体性能影响很小，还可以通过后一级射频放大器来弥补插入损耗。
由此可见，采用图1所示的低噪声功率放大器这一实施例，通过微处理器控制射频开关进行转换的方式，既能够单独输出该低噪声功率放大器的本底噪声，又能够输出包含本底噪声、外部噪声和接收信号在内的总接收信号，从而能够通过分别检测本底噪声功率和总接收信号功率的变化情况来准确判断识别是否存在干扰信号。这是由于在获得本底噪声功率测量值后，正常情况下，外部噪声和接收信号功率通常都是在一个合理区间范围内，因此总的输出功率减去本底噪声功率后剩余的功率值也应该处于该合理区间范围内。若检测出的总的输出功率减去本底噪声功率后剩余的功率值明显超出该合理区间范围，则可以判断有干扰信号存在。
图2是本发明用于卫星导航及授时的低噪声功率放大器一实施例的组成图。与图1相比较，图2中的低噪声功率放大器20包括天线输入端21、匹配电阻22、单刀双掷射频开关23、射频放大器25和微处理器24，与图1中对应的这些组成部分具有相同的功能作用，不再赘述。区别在于，图1中的射频信号输出端16和电源输入端17为在图2中为同一个双信号端口27，该双信号端口27与一个馈电网络26的混合信号输出端263电连接，该馈电网络26的射频信号输入端261连接射频放大器25的输出端252，该馈电网络26的直流电源输出端262连接单刀双掷射频开关23、射频放大器25和微处理器24。
采用馈电网络26后，可以使得射频信号输出端16和电源输入端17合二为一，减少了该低噪声功率放大器的接口端数，更加方便使用。
进一步的，图2中馈电网络26的一个优选实施例如图3所示：该馈电网络36的混合信号输出端363与射频信号输入端361之间连接有电容器37，该馈电网络36的混合信号输出端363与直流电源输出端362之间连接有电感器38。进一步的，在直流电源输出端362还连接一个稳压器39的输入端391，稳压器的输出端392连接单刀双掷射频开关、射频放大器和微处理器。优选的，电容器37可以采用电容量大于100pF、误差不超过5％，耐压不低于50V的NPO材质的贴片陶瓷电容器，如福建火炬电子科技股份有限公司生产的CC41-0402-CG-50V-100P-C(N)贴片电容器；电感器38可以采用电感量不低于47nH，误差不超过20％，允许最大通过电流不低于100mA，自谐振频率不低于2000MHz的电感器，如MURATA公司生产的LQW18AN47NJ00D贴片电感器；稳压器39选用输出电流大于75mA，压差不大于100mV的低压差线性稳压器，如TI公司的TPS73130DBVR稳压器。
优选的，在图1或图2所示的用于卫星导航及授时的低噪声功率放大器的实施例中，上述匹配电阻可以选用阻值49.9欧姆、精度 1％的普通贴片电阻；上述微处理器可使用小体积、低功耗、内置数据存储器和程序存储器的微处理器，如TI公司的MSP430F2012RSA处理器；该单刀双掷射频开关为单片集成电路射频开关，该集成电路射频开关的插入损耗小于1dB，隔离度大于30dB，带宽为1GHz～2GHz，工作频率涵盖该天线输入端外部连接的天线所接收的卫星导航信号的中心频率。例如，单刀双掷射频开关可使用带宽覆盖1～2GHz，插损小于1dB，隔离度大于30dB的射频开关，如TriQuint Semiconductor公司生产的TQP4M0010。
优选的，在图1或图2所示的用于卫星导航及授时的低噪声功率放大器的实施例中，为了保证该射频放大器有更高的增益值，上述射频放大器可以包括两个级联的放大器组件，其中，第一级放大器组件的输入端与该单刀双掷射频开关的公共输出端电连接，该第一级放大器组件的输出端与第二级放大器组件的输入端电连接，该第二级放大器组件的输出端连接该馈电网络的射频信号输入端，第一级放大器的增益大于18dB，噪声系数低于1dB，如MAXIM公司MAX2659低噪声GPS放大器；第二级放大器的增益大于20dB，噪声系数低于4dB，1dB压缩点的输出功率不小于0dBm，如AVAGO公司的ABA31563低噪声放大器。这样，整个射频放大器的总增益为35dB左右。
进一步的，为了抑制带外干扰，可以在该第一级放大器组件的输入端与该单刀双掷射频开关的公共输出端之间串接低插入损耗的第一带通波滤波器，如TriQuint Semiconductor公司生产的856561等GPS L1频点声表面波带通滤波器；在该第一级放大器组件的输出端与第二级放大器组件的输入端之间串接通频带宽较窄的第二带通滤波器，如TAISAW公司生产的TA0664A等GPS L1频点声表面波带通滤波器。
本发明还提供了上述用于卫星导航及授时的低噪声功率放大器的使用方法。通常是将该低噪声功率放大器的天线输入端连接外部接收天线，射频信号输出端通过射频电缆连接接收机，电源输入端 接入直流电源。进一步的，如图4所示，在步骤S11中，开机加电后，微处理器控制单刀双掷射频开关，接通匹配电阻与射频放大器之间的电连接，经延时，该射频信号输出端输出该用于卫星导航及授时的低噪声功率放大器的本底噪声。在步骤S12中，延时结束后，微处理器控制单刀双掷射频开关，断开匹配电阻与所述射频放大器之间的电连接，接通并保持天线输入端与射频放大器之间的电连接，该射频信号输出端输出总接收信号功率。优选的，上述延时时长为1秒～60秒，不短于接收机测量本底噪声功率所需要得时间即可。
基于以上实施例，本发明提供的用于卫星导航及授时的低噪声功率放大器及其使用方法，通过在该低噪声功率放大器设置匹配电阻、单刀双掷射频开关、射频放大器和微处理器的方式，由微处理器控制单刀双掷射频开关分别接入匹配电阻和天线输入端，来测量该低噪声功率放大器的本底噪声功率和总接收信号功率，再用这两个功率的差值变化来实时识别判断是否存在干扰信号。这种方式实现了对本底噪声功率和总接收信号功率的独立测量，并且，这两种功率测量可以实时进行自动切换，不受环境温度的影响，提高了检测效率，方便使用。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构变换，或直接或间接运用在其他相关的技术领域，均包括在本发明的专利保护范围内。

Claims (9)

  1. 一种用于卫星导航及授时的低噪声功率放大器，包括天线输入端、射频信号输出端和电源输入端，其特征在于，
    所述低噪声功率放大器包括匹配电阻、单刀双掷射频开关、射频放大器和微处理器，所述单刀双掷射频开关的一个输入端与所述天线输入端电连接，所述单刀双掷射频开关的另一个输入端与所述匹配电阻电连接，所述单刀双掷射频开关的公共输出端与所述射频放大器的输入端电连接，所述射频放大器的输出端与所述射频信号输出端电连接，所述单刀双掷射频开关与所述微处理器电连接并受所述微处理器控制，所述电源输入端连接所述单刀双掷射频开关、射频放大器和微处理器。
  2. 根据权利要求1所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，所述匹配电阻的阻值与所述天线输入端的输入特性阻抗值相同。
  3. 根据权利要求2所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，所述射频信号输出端和电源输入端为同一个双信号端口，所述双信号端口与一个馈电网络的混合信号输出端电连接，所述馈电网络的射频信号输入端连接所述射频放大器的输出端，所述馈电网络的直流电源输出端连接所述单刀双掷射频开关、射频放大器和微处理器。
  4. 根据权利要求3所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，所述馈电网络的所述混合信号输出端与所述射频信号输入端之间连接有电容器，所述馈电网络的所述混合信号输出端与所述直流电源输出端之间连接有电感器，所述直流电源输出端连接一个稳压器的输入端，所述稳压器的输出端连接所述单刀双掷射频开关、射频放大器和微处理器。
  5. 根据权利要求3或4所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，所述单刀双掷射频开关为单片集成电路射 频开关，所述集成电路射频开关的插入损耗小于1dB，隔离度大于30dB，带宽为1GHz～2GHz，工作带宽涵盖所述天线输入端外部连接的天线所接收的卫星导航信号的频带。
  6. 根据权利要求5所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，所述射频放大器包括两个级联的放大器组件，其中，第一级放大器组件的输入端与所述单刀双掷射频开关的公共输出端电连接，所述第一级放大器组件的输出端与第二级放大器组件的输入端电连接，所述第二级放大器组件的输出端连接所述馈电网络的射频信号输入端，第一级放大器的增益大于18dB，噪声系数低于1dB，第二级放大器的增益大于20dB，噪声系数低于4dB，1dB压缩点的输出功率不小于0dBm。
  7. 根据权利要求6所述的用于卫星导航及授时的低噪声功率放大器，其特征在于，在所述第一级放大器组件的输入端与所述单刀双掷射频开关的公共输出端之间串接第一带通滤波器，在所述第一级放大器组件的输出端与第二级放大器组件的输入端之间串接第二带通滤波器。
  8. 一种用于卫星导航及授时的低噪声功率放大器的使用方法，将权利要求1至7任一项所述的低噪声功率放大器的天线输入端连接外部接收天线，射频信号输出端通过射频电缆连接接收机，电源输入端接入直流电源，其特征在于，
    开机加电后，所述微处理器控制所述单刀双掷射频开关，接通所述匹配电阻与所述射频放大器之间的电连接，经延时，所述射频信号输出端输出所述用于卫星导航及授时的低噪声功率放大器的本底噪声；
    延时结束后，所述微处理器控制所述单刀双掷射频开关，断开所述匹配电阻与所述射频放大器之间的电连接，接通并保持所述天线输入端与所述射频放大器之间的电连接，所述射频信号输出端输出总接收信号。
  9. 根据权利要求8所述的用于卫星导航及授时的低噪声功率放 大器的使用方法，其特征在于，所述延时时长为1秒～60秒。
PCT/CN2017/075379 2016-05-16 2017-03-02 一种用于卫星导航及授时的低噪声功率放大器及使用方法 WO2017197954A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2016103243377 2016-05-16
CN201610324337.7A CN105897186B (zh) 2016-05-16 2016-05-16 一种用于卫星导航及授时的低噪声功率放大器及使用方法

Publications (1)

Publication Number Publication Date
WO2017197954A1 true WO2017197954A1 (zh) 2017-11-23

Family

ID=56716509

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/075379 WO2017197954A1 (zh) 2016-05-16 2017-03-02 一种用于卫星导航及授时的低噪声功率放大器及使用方法

Country Status (2)

Country Link
CN (1) CN105897186B (zh)
WO (1) WO2017197954A1 (zh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108123734A (zh) * 2018-01-31 2018-06-05 桂林电子科技大学 一种基于方向回溯阵列的姿态不稳定小卫星通信装置
CN109270555A (zh) * 2018-09-27 2019-01-25 深圳华大北斗科技有限公司 卫星信号参考站以及卫星定位系统
CN109714552A (zh) * 2019-02-21 2019-05-03 成都新光微波工程有限责任公司 基于卫星传输的单频网地面数字电视广播发射机
CN109888514A (zh) * 2019-04-01 2019-06-14 云南大学 一种快速定标射电望远镜接收机及定标方法
CN111123305A (zh) * 2019-12-12 2020-05-08 秦然 一种gnss记录回放测试仪图形化噪声系数优化方法
CN112050969A (zh) * 2019-06-07 2020-12-08 株式会社村田制作所 温度检测电路以及模块
CN112305507A (zh) * 2019-08-02 2021-02-02 上海航天电子通讯设备研究所 一种使用氮化镓功率放大器的雷达收发组件
CN114257264A (zh) * 2021-12-15 2022-03-29 惠州Tcl移动通信有限公司 射频天线线路、pcb板及移动终端
CN115314068A (zh) * 2022-08-08 2022-11-08 深圳市远东华强导航定位有限公司 一种gnss和rsmc一体化芯片
CN115309031A (zh) * 2022-07-22 2022-11-08 杭州亿邦博通科技股份有限公司 北斗/gps双模数字高精度同步授时设备及系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105897186B (zh) * 2016-05-16 2019-01-22 江苏指南针导航通信技术股份有限公司 一种用于卫星导航及授时的低噪声功率放大器及使用方法
CN106646435A (zh) * 2017-01-25 2017-05-10 大连理工大学 一种用于实验教学的水下声源系统
CN111245458A (zh) * 2020-03-03 2020-06-05 延锋伟世通电子科技（上海）有限公司 一种v2x天线车载射频信号线损开环补偿系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201331580Y (zh) * 2008-12-30 2009-10-21 江苏指南针导航通信技术有限公司 一体式北斗一号卫星导航系统用户机
CN201387485Y (zh) * 2009-04-21 2010-01-20 中国人民解放军理工大学 一种北斗卫星导航系统接收模块
US20120134303A1 (en) * 2009-02-27 2012-05-31 Research In Motion Limited Mobile wireless communications device including a differential output lna connected to multiple receive signal chains
CN203071872U (zh) * 2012-12-04 2013-07-17 江苏指南针导航通信技术有限公司 低噪声功率放大装置及卫星导航接收设备
CN105897186A (zh) * 2016-05-16 2016-08-24 江苏指南针导航通信技术股份有限公司 一种用于卫星导航及授时的低噪声功率放大器及使用方法
CN205647447U (zh) * 2016-05-16 2016-10-12 江苏指南针导航通信技术股份有限公司 一种用于卫星导航及授时的低噪声功率放大器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100382468C (zh) * 2003-07-08 2008-04-16 大唐移动通信设备有限公司 时分双工无线通信系统收发线性开关电路和其实现方法
CN100375413C (zh) * 2003-09-28 2008-03-12 中兴通讯股份有限公司 一种大功率线性收发开关电路
US8547185B2 (en) * 2010-07-19 2013-10-01 MindTree Limited Center-tapped inductor balun
JP5727199B2 (ja) * 2010-11-11 2015-06-03 Ｄｘアンテナ株式会社 電子機器
CN202565260U (zh) * 2012-04-28 2012-11-28 成都泰格微波技术股份有限公司 射频通信收发自动选择电路
CN103066925B (zh) * 2012-12-04 2015-10-28 江苏指南针导航通信技术有限公司 低噪声功率放大方法、放大装置及卫星导航接收设备
CN103594794B (zh) * 2013-11-20 2015-10-28 大连海事大学 一种高性能多模卫星导航有源天线

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201331580Y (zh) * 2008-12-30 2009-10-21 江苏指南针导航通信技术有限公司 一体式北斗一号卫星导航系统用户机
US20120134303A1 (en) * 2009-02-27 2012-05-31 Research In Motion Limited Mobile wireless communications device including a differential output lna connected to multiple receive signal chains
CN201387485Y (zh) * 2009-04-21 2010-01-20 中国人民解放军理工大学 一种北斗卫星导航系统接收模块
CN203071872U (zh) * 2012-12-04 2013-07-17 江苏指南针导航通信技术有限公司 低噪声功率放大装置及卫星导航接收设备
CN105897186A (zh) * 2016-05-16 2016-08-24 江苏指南针导航通信技术股份有限公司 一种用于卫星导航及授时的低噪声功率放大器及使用方法
CN205647447U (zh) * 2016-05-16 2016-10-12 江苏指南针导航通信技术股份有限公司 一种用于卫星导航及授时的低噪声功率放大器

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108123734A (zh) * 2018-01-31 2018-06-05 桂林电子科技大学 一种基于方向回溯阵列的姿态不稳定小卫星通信装置
CN108123734B (zh) * 2018-01-31 2024-05-31 桂林电子科技大学 一种基于方向回溯阵列的姿态不稳定小卫星通信装置
CN109270555A (zh) * 2018-09-27 2019-01-25 深圳华大北斗科技有限公司 卫星信号参考站以及卫星定位系统
CN109714552A (zh) * 2019-02-21 2019-05-03 成都新光微波工程有限责任公司 基于卫星传输的单频网地面数字电视广播发射机
CN109888514B (zh) * 2019-04-01 2023-11-24 云南大学 一种快速定标射电望远镜接收机及定标方法
CN109888514A (zh) * 2019-04-01 2019-06-14 云南大学 一种快速定标射电望远镜接收机及定标方法
CN112050969A (zh) * 2019-06-07 2020-12-08 株式会社村田制作所 温度检测电路以及模块
CN112305507A (zh) * 2019-08-02 2021-02-02 上海航天电子通讯设备研究所 一种使用氮化镓功率放大器的雷达收发组件
CN111123305A (zh) * 2019-12-12 2020-05-08 秦然 一种gnss记录回放测试仪图形化噪声系数优化方法
CN111123305B (zh) * 2019-12-12 2023-08-22 秦然 一种gnss记录回放测试仪图形化噪声系数优化方法
CN114257264B (zh) * 2021-12-15 2023-08-11 惠州Tcl移动通信有限公司 射频天线线路、pcb板及移动终端
CN114257264A (zh) * 2021-12-15 2022-03-29 惠州Tcl移动通信有限公司 射频天线线路、pcb板及移动终端
CN115309031A (zh) * 2022-07-22 2022-11-08 杭州亿邦博通科技股份有限公司 北斗/gps双模数字高精度同步授时设备及系统
CN115309031B (zh) * 2022-07-22 2023-12-29 杭州亿邦博通科技股份有限公司 北斗/gps双模数字高精度同步授时设备及系统
CN115314068A (zh) * 2022-08-08 2022-11-08 深圳市远东华强导航定位有限公司 一种gnss和rsmc一体化芯片
CN115314068B (zh) * 2022-08-08 2024-04-23 深圳市远东华强导航定位有限公司 一种gnss和rsmc一体化芯片

Also Published As

Publication number Publication date
CN105897186B (zh) 2019-01-22
CN105897186A (zh) 2016-08-24

Similar Documents

Publication Publication Date Title
WO2017197954A1 (zh) 一种用于卫星导航及授时的低噪声功率放大器及使用方法
CN204031163U (zh) 大功率毫米波收发组件
US8271028B2 (en) Dual band amplifier
CN106571850A (zh) 一种tdd模式的双向放大器
CN109167608A (zh) 一种小型化S-Ku波段超宽带射频接收机
CN101424729B (zh) 北斗/gps授时型双系统接收模块
US9100079B2 (en) Wireless transceiver and method of controlling the wireless transceiver
CN106100675A (zh) 一种射频前端装置、天线装置及移动终端
US7005941B2 (en) High-frequency coupler
CN110361708A (zh) 一种微波收发组件自检电路及方法
CN106452471B (zh) 一种gsm射频电路及包括该电路的终端
CN205374730U (zh) 一种Ku波段收发组件
CN206627616U (zh) 一种Ka波段收发组件
CN211019020U (zh) 一种防干扰型降频器
CN205647447U (zh) 一种用于卫星导航及授时的低噪声功率放大器
US7505743B2 (en) Dual band transmitter having filtering coupler
CN201114051Y (zh) 北斗/gps授时型双系统接收天线
CN113381779B (zh) 超宽带接收机
WO2021223121A1 (zh) 多频双向放大器、收发机、控制方法及存储介质
CN207099057U (zh) 一种射频信号开关切换电路
CN113162648A (zh) 一种具备抗有源驻波的大功率收发前端电路
CN107682022A (zh) 一种移动终端及天线匹配网络的调节方法
US6141538A (en) Transmit detection circuit
US6969985B2 (en) Active coupler
US8121568B2 (en) Radio frequency handling device

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17798521

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17798521

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17798521

Country of ref document: EP

Kind code of ref document: A1