S-band low-noise amplifier redundancy system

Abstract

The invention discloses an S-band low-noise amplifier redundancy system, which comprises a first S-band low-noise amplifier and a second S-band low-noise amplifier, wherein the first S-band low-noise amplifier and the second S-band low-noise amplifier are used for low-noise amplification; the input switch is used for switching an input S-band sweep frequency source signal to a first S-band low noise amplifier and a second S-band low noise amplifier; the first S-band low-noise amplifier and the second S-band low-noise amplifier process input signals and then output S-band output signals through the output switch; when the first S-band low-noise amplifier and the second S-band low-noise amplifier work, one is used as a host, and the other is used as a standby; the repeater is connected to the first S-band low noise amplifier, the second S-band low noise amplifier, the input switch and the output switch, and is used for controlling the switching state of the input switch and the output switch and the working state of the first S-band low noise amplifier and the working state of the second S-band low noise amplifier. According to the scheme, the working stability of the low-noise amplifier can be improved.

Description

Technical Field

[0001] The invention relates to the field of low noise amplifier circuit design, and in particular to an S-band low noise amplifier redundant system. Background Art

[0002] S-band low noise amplifiers are commonly used in receiving channel components in military and civilian radar systems. As a front-end subsystem of radar TR components, S-band low noise amplifiers are an important part of TR in radar and satellite communication systems. Since S-band low noise amplifiers have the characteristics of low noise coefficient and high gain, they can receive very weak radar reflection signals. At the same time, because of their short wavelength, S-band low noise related products are small in size and can be used in various occasions. Therefore, an S-band low noise amplifier redundant system has become one of the important components in radar systems.

[0003] The existing S-band low noise amplifier has poor reliability, difficulty in outdoor installation, heavy weight, lack of support for multiple switching modes, and a narrow operating temperature range.

[0004] In particular, due to the limitations of its working environment, when its host fails, the entire low-noise amplifier will not work and cannot meet the requirements of continuous and stable operation. It does not have a master-slave design and can only achieve a single adjustment control, which cannot meet the needs of multiple switching control modes. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an S-band low noise amplifier redundant system for solving the problem of low noise amplifier operation reliability through a master-slave design, while supporting manual and automatic switching working modes.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: an S-band low noise amplifier redundant system, comprising a first S-band low noise amplifier, a second S-band low noise amplifier, an input switch, a repeater and an output switch;

[0007] Wherein: the first S-band low noise amplifier and the second S-band low noise amplifier are used for low noise amplification; the input switch is used to switch the input S-band frequency sweep source signal to the first S-band low noise amplifier and the second S-band low noise amplifier; the first S-band low noise amplifier and the second S-band low noise amplifier process the input signal and then output the S-band output signal through the output switch; when the first S-band low noise amplifier and the second S-band low noise amplifier are working, one of them serves as the main machine and the other serves as the standby machine;

[0008] The repeater is respectively connected to the first S-band low noise amplifier, the second S-band low noise amplifier, the input switch, and the output switch to control the switching state of the input switch and the output switch and the working state of the first S-band low noise amplifier and the second S-band low noise amplifier.

[0009] The redundant system also includes a backup controller, which is connected to the repeater; the backup controller is used to connect to the repeater to set the working parameters of the low noise amplifier, and the repeater communicates with the backup controller over a long distance to control the switching of input and output switch components and the main and standby working states of the first and second S-band low noise amplifiers.

[0010] The backup controller performs status setting and parameter query through buttons and LCD display or exchanges data with the station control system through LNA, and reports the redundant system parameters to the station control system. The station control system sets the parameters of the low noise amplifier through LNA and switches the input and output switches.

[0011] The first S-band low noise amplifier and / or the second S-band low noise amplifier comprises a low noise amplifier embedded core control board, a low noise amplifier drive power supply module and a low noise amplifier filter component;

[0012] The low-noise amplification and filtering component comprises a first-stage low-noise amplifier, a filter, a temperature-compensated attenuator and a second-stage amplifier; the S-band signal passes through the first-stage low-noise amplifier, the filter, the temperature-compensated attenuator and the second-stage amplifier in sequence and then outputs a signal after low-noise amplification;

[0013] The low noise amplifier embedded core control board is used to monitor the current, voltage, ambient temperature of the low noise amplifier filter component and control the temperature compensation attenuator to perform temperature compensation gain compensation and other parameters, and communicate and exchange data with the repeater through CAN;

[0014] The low noise amplifier drive power supply module is used to power the first-stage low noise amplifier and the second-stage amplifier of the low noise amplifier filter component; and to provide voltage for the control pin of the temperature compensation attenuator to change the gain of the component and perform temperature compensation gain compensation;

[0015] The low noise amplifier driving power supply module also includes a detection module for detecting voltage and current, and sends the detected current and voltage parameters to the low noise amplifier embedded core control board for analysis and interpretation to determine the working status of the S-band low noise amplifier and report it to the repeater.

[0016] The backup controller includes: a power filter, a power switch, a power module, a status indicator, a button unit, an MCU monitoring unit, a display unit, an Ethernet port module, and a CAN module; the AC power is input to the input end of the power filter, and the output end of the power filter is connected to the MCU monitoring unit after passing through the power switch and the power module in sequence; the MCU monitoring unit is respectively connected to the status indicator unit, the display unit, and the button unit; the MCU monitoring unit expands network communication through the Ethernet port module; the MCU monitoring unit expands CAN network communication through the CAN module;

[0017] The status indication unit communicates with the MCU monitoring unit to display the working status of the system;

[0018] The MCU monitoring unit is connected to the key unit and the display unit, and the relevant parameters are set through the key unit; the attenuation value of the host or standby machine is set by keys, and the relevant parameters can be queried through the key unit. The display unit is used to display the working status information of the current redundant control system;

[0019] The network port module and the CAN module exchange information through the dedicated transmission chip and the MCU monitoring unit respectively, so as to realize the backup controller connecting to the repeater through the CAN network and connecting to the remote monitoring device through the network port.

[0020] The remote monitoring device and the backup controller work in a master / slave query mode, with the remote monitoring device as the master device and the backup controller as the slave device. The slave device does not provide an active reporting function. The backup controller does not need to preset the network interface configuration of the remote monitoring device. It can respond according to the source address of the remote monitoring device request message. The remote monitoring device registers the interface information of the low noise amplifier. The remote monitoring device sends a query or setting request to the low noise amplifier according to the preset information and receives the response information of the backup controller.

[0021] The repeater includes an MCU monitoring unit, a status indication unit, a CAN module 1, a CAN module, and a CAN module 3. The MCU monitoring unit is connected to the status indication unit to indicate the working status of the repeater; the MCU monitoring unit is respectively connected to the CAN module 1, the CAN module, and the CAN module 3, and is respectively connected to the first S-band low noise amplifier, the second S-band low noise amplifier, and the backup controller through three CAN interfaces.

[0022] The input switch comprises: an input switch chip, which is a reflective single-pole double-throw switch chip, and controls two output directions through a relay controller to achieve output to a host machine or a standby machine.

[0023] The output switch comprises: an output switch chip, which is a reflective single-pole double-throw switch chip. The two input directions are controlled by a relay controller to control the two input signals to be connected to the outputs of the host machine and the standby machine respectively.

[0024] The advantages of the present invention are: it is used to solve the problem of low noise amplifier operation reliability through the main-standby design, and supports manual and automatic switching working modes. It realizes low noise amplification of low input signals in the S band; at the same time, it realizes hot backup in the S band. If one host fails, it can switch to another backup machine, thereby improving the reliability of system operation; at the same time, the system noise coefficient and gain are large; remote and local mode operations can be performed through the backup controller; the switch switching function also has manual and automatic functions; the reliability is enhanced, and multiple switching modes (automatic switching and manual switching) are provided, and the operating temperature range is wide (-45℃~+65℃), so as to ensure the stability of the received signal and the wide outdoor temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0026] Figure 1 It is a structural block diagram of an S-band low noise amplifier redundant system provided in a preferred embodiment of the present invention;

[0027] Figure 2 This is a structural block diagram of an S-band low noise amplifier provided in a preferred embodiment of the present invention;

[0028] Figure 3 It is a structural block diagram of a low noise amplification and filtering component provided in a preferred embodiment of the present invention;

[0029] Figure 4 is a structural block diagram of a backup controller provided in a preferred embodiment of the present invention;

[0030] Figure 5 is a structural block diagram of a repeater provided in a preferred embodiment of the present invention;

[0031] Figure 6 is a structural block diagram of an input switch provided in a preferred embodiment of the present invention;

[0032] Figure 7 is a structural block diagram of an output switch provided in a preferred embodiment of the present invention;

[0033] The marks in the above figure are: 1. Input switch; 2. Repeater; 3. Output switch; 4. S-band low noise amplifier (main unit); 5. S-band low noise amplifier (backup unit); 6. Backup controller;

[0034] First-stage low noise amplifier 40101; filter 40102; temperature compensated attenuator 40103; second-stage low noise amplifier 40104; low noise amplifier filter component 401; low noise amplifier drive power supply module 402; low noise amplifier embedded core control board 403; power filter 601; power switch 602; power module 603; status indication 604; button unit 605; MCU monitoring unit 606; display unit 607; network port module 608; CAN module 609; power filter 201; power switch 202; power module 203; MCU monitoring unit 204; status indication 205; CAN module 1 206; CAN module 2 207; CAN module 3 208; input switch chip 101; output switch chip 301. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0036] This embodiment provides a redundant system that can switch between the main machine and the standby machine during use, which has enhanced reliability, simple structure, convenient outdoor installation, light weight, multiple switching modes (automatic switching and manual switching), and a wide operating temperature range (-45℃~+65℃) to ensure the stability of the received signal and a wide outdoor temperature range S-band low noise amplifier redundant system. Figure 1 As shown, an S-band low noise amplifier redundant system includes a first S-band low noise amplifier, a second S-band low noise amplifier, an input switch, a backup controller, a repeater and an output switch; when the first S-band low noise amplifier and the second S-band low noise amplifier are working, one of them serves as a host and the other serves as a backup; the first S-band low noise amplifier serves as the host and the second S-band low noise amplifier serves as the backup to control the work;

[0037] Wherein: the first S-band low noise amplifier and the second S-band low noise amplifier are used for low noise amplification; the input switch is used to switch the input S-band sweep source signal to the first S-band low noise amplifier and the second S-band low noise amplifier; the first S-band low noise amplifier and the second S-band low noise amplifier process the input signal and then output the S-band output signal through the output switch;

[0038] The repeater is respectively connected to the first S-band low noise amplifier, the second S-band low noise amplifier, the input switch, and the output switch to control the switching state of the input switch and the output switch and the working state of the first S-band low noise amplifier and the second S-band low noise amplifier.

[0039] The backup controller is connected to the repeater; the backup controller is used to connect to the repeater to set the working parameters of the low noise amplifier. The repeater communicates with the backup controller over long distances to control the switching of input and output switch components and the main and standby working states of the first and second S-band low noise amplifiers.

[0040] The above solution can be used to switch the host and standby redundant system, which has enhanced reliability, simple structure, convenient outdoor installation, light weight, multiple switching modes (automatic switching and manual switching), and a wide operating temperature range (-45℃~+65℃) to ensure the stability of the received signal and a wide outdoor temperature S-band low noise amplifier redundant system.

[0041] like Figure 1-7 As shown, the present invention provides an S-band low noise amplifier redundant system, the S-band low noise amplifier redundant system comprising: 2 S-band low noise amplifiers, 1 input switch and 1 backup controller, 1 repeater, and 1 output switch;

[0042] Among them, the S-band low noise amplifier uses a 2200-2300.5MHz radio frequency signal for low noise amplification, the input switch component is used to switch the input S-band sweep source signal into two paths through the radio frequency switch, which can be respectively given to the S-band low noise amplifier host or backup machine and output the host or backup machine to the output port through the output switch component, the backup controller can control the switch state of the S-band low noise amplifier redundant system or set the low noise amplifier working parameters (gain) through the operation panel interface or LNA, the repeater communicates with the backup controller over a long distance (CAN communication) to control the switching of the input and output switch components and the working state of the low noise amplifier host (backup machine), the backup controller can set the state and query the parameters of an S-band low noise amplifier redundant system through buttons and display LCD, and can also exchange data with the station control system through LNA, and report the redundant system parameters to the station control system, and the station control system can set the parameters of the low noise amplifier through LNA and switch the switch.

[0043] The S-band low noise amplifier includes: a low noise amplifier embedded core control board, a low noise amplifier drive power supply module and a low noise amplifier filter component; the S-band signal passes through the first-stage low noise amplifier, filter, temperature compensated attenuator and the low noise amplifier filter component composed of the second-stage amplifier in sequence; the first-stage low noise amplifier uses the I LA-0003A, the filter is Hefei Fandao HLFQ-A012R69-0R12, the temperature-compensated attenuator is RF2113, and the second-stage amplifier is ILA-003025D from Core Valley. The input S-band signal enters the first-stage amplifier for low-noise amplification, and then is filtered by the filter, and then enters the temperature-compensated attenuator for temperature-compensated gain compensation, so that the product can work normally at (-45℃~+65℃) and the gain change with temperature is less than 1dB. After that, the signal enters the second-stage amplifier after being low-noise amplified and selected, and finally output, so that the product has a gain greater than 50dB at 2200~2300.5MHz, a noise figure less than 0.75dB, and 40dB suppression at 2018GHz out of band;

[0044] The embedded core control board of the low noise amplifier is used to monitor the current, voltage, ambient temperature of the low noise amplifier filter component, control the temperature compensation attenuator for temperature compensation gain compensation and other parameters, and communicate and exchange data with the S-band low noise amplifier redundant system through CAN. The low noise amplifier drive power supply module is used to provide +5V (55mA) and +5V (65mA) working voltage and current to the first-stage amplifier and the second-stage amplifier of the low noise amplifier filter component to facilitate its normal operation, and control the control foot of the temperature compensation attenuator to provide (0~3.3V) voltage to facilitate changing the gain of the component and perform temperature compensation gain compensation. The drive power supply module also has the ability to detect voltage and current, and send these current and voltage parameters to the embedded core control board of the low noise amplifier for analysis and judgment of the working status of the frequency band low noise amplifier and report it to the repeater.

[0045] The backup controller (1 piece) includes: power filter, power switch, power module, status indicator, button unit, MCU monitoring unit, display unit, network port module, and CAN module. First, the external 220V AC power of the backup controller enters through the power filter. The power filter adopts TP3233M-3A of Beijing Taipaist. After the AC voltage is filtered by the power supply, it is designed to ensure the electromagnetic capacitor. The AC voltage passes through the power switch again. The sub-switch adopts Zhenhua Group KN1-302. The input 220V can be cut off and turned on through the button switch, realizing the cutting off and turning on of the backup controller. After that, the 220V AC power enters the power module. The power module adopts PAB100-220S28-A of Pengtu Company, with a power consumption of 100 watts, and converts the 220V AC power into DC +28V. The +28V power is supplied to the MCU monitoring unit through the power cord to enable it to work normally.

[0046] The status indication communicates with the MCU monitoring unit to display the working status of an S-band low-noise amplifier redundant system. The status indication adopts KAN18JS-H1-R / GF5. The specific status includes 3 groups of LED lights. The first group is the power indicator light. If the product is powered on normally, the green light will be on. Otherwise, the light will not be on or the red light will be on (overcurrent, overvoltage); the second group is the host online display. If the backup controller can communicate with the host through the CAN module, the green light will be on. If it is not online, the red light will be on; the third group is the standby online display. If the backup controller can communicate with the standby through the CAN module, the green light will be on. If it is not online, the red light will be on; the MCU monitoring unit is a system based on GigaDevice. The core monitoring module of the new single-chip microcomputer GD32F303ZET6 can perform analysis and calculation, etc. The monitoring unit needs to be connected to the key unit and the display unit; the relevant parameters are set through the key unit. The key unit has five keys, namely up, down, left, right, and confirm keys. The key selection setting can change the switching mode, such as automatic switching or manual switching, and can set an S-band low-noise amplifier redundant system to be in remote control mode or local control mode, and set the working mode in host or standby mode by key, and set the host or standby attenuation value by key. The key unit can query relevant parameters such as working in the host or standby, as well as the temperature, gain attenuation value and other parameters of the host or standby.

[0047] The display unit is interconnected with the MCU monitoring unit through a data line to display relevant parameters or status on the display unit. The display unit adopts the M31S1322-01-V1 standard OLED module. The display unit can display whether it is working in the host or standby mode, as well as the attenuation value, current, temperature and other parameters of the host or standby mode. It can also display the latest 100 alarm records and whether it is currently working in local mode or remote control mode. In local mode, all settings are set by pressing buttons, but in remote mode, relevant parameters are queried or set through LNA.

[0048] The network port module and CAN module 609 exchange information through the dedicated transmission chip and the MCU monitoring unit respectively, so that the entire module can work in the remote mode (LNA). The network port module adopts the network port chip CH392F. The remote monitoring device interacts with the backup controller to indirectly realize the monitoring of the low noise amplifier device.

[0049] Whether the remote monitoring device interacts with the backup controller or the low noise amplifier device, it uses a unified interaction logic and data frame format. The remote monitoring device and the backup controller work in a master / slave query mode, with the remote monitoring device as the master device and the backup controller as the slave device. The slave device does not provide an active reporting function. The backup controller does not need to preset the network interface configuration of the remote monitoring device, and can respond according to the source address of the remote monitoring device request message. The remote monitoring device side registers the interface information of the low noise amplifier, and the remote monitoring device sends a query or setting request to the low noise amplifier according to the preset information.

[0050] The CAN module uses the chip TD301 MCAN, which supports the CAN2.0B specification (compatible with CAN2.0A); it has two completely isolated CAN channels, using electromagnetic isolation; the baud rate is 5Kbps~1Mbps, which can be set by software; it supports data frames and extended frame formats; one CAN input interface and one CAN output interface; the interface rate is 100kbps, using extended frames, the internal filtering function is set, the CAN sampling rate is about 87.5, and irrelevant data is automatically discarded. A frame is reported every 1s in a cyclic manner. When an important state changes (such as an alarm), a frame corresponding to the data frame is reported in bursts. Communicate through CAN and repeaters to read or set relevant parameters;

[0051] The repeater (1 piece) includes: power filter, power switch, power module, MCU monitoring unit, status indicator, CAN module 1, CAN module 2, CAN module 3; the repeater is to set the relevant parameters and settings of the host and standby machine, and the MCU monitoring unit in the relay control has the function of analysis and judgment. For example, if the host has overcurrent, overtemperature, overvoltage and other faults, the MCU monitoring unit in the relay control automatically sets the input switch and output switch direction to the standby machine, or if the standby machine has a fault, it automatically switches to the host machine; the repeater is a data transfer and a control unit with independent judgment;

[0052] The repeater exchanges relevant data with the backup controller through CAN module 3; the external 220V AC power of the repeater first enters through the power filter. The power filter adopts TP3233M-1A of Beijing Taipaist. After the AC voltage is filtered by the power supply, it is designed to ensure the electromagnetic capacitor. The AC voltage passes through the power switch again. The sub-switch adopts Zhenhua Group KN1-302. The input 220V can be cut off and turned on through the button switch, realizing the cutting and turning on of the repeater. After that, the 220V AC power enters the power module. The power module The block uses Pengtu's PAB50-220S28-A, 50 watt power consumption, to convert 220V AC into DC +28V, +28V electricity is used to power the MCU monitoring unit through the power cord to make it work normally; the status indication communicates with the MCU monitoring unit to display the working status of the repeater. The status indication uses KAN18JS-H1-R / GF5, and the specific status includes 1 group of LED lights, which is the power indicator light. If the product is powered on normally, the green light will be on, otherwise the light will not be on or the red light will be on (overcurrent, overvoltage);

[0053] The input switch includes: input switch chip. The input switch chip adopts ISW210G of XinGu Company, which is a GaAsPI N reflective single-pole double-throw switch chip, with 50Ω matching at the input / output end, a frequency range of 2 to 20GHz, and -5V / +5V control. Built-in bias network and DC blocking capacitor, easy to use. It has excellent switching characteristics and port standing wave characteristics in the entire operating frequency range, and is very suitable for microwave hybrid integrated circuits, multi-chip modules and low-power systems. The control signal is 5V / +5V through the relay controller, and the control input signal has two output directions, which can be output to output 1, that is, the host, or to output 2, that is, the standby machine.

[0054] The output switch includes: output switch chip. The output switch chip adopts ISW210G of XinGu Company, which is a GaAsPI N reflective single-pole double-throw switch chip, with 50Ω matching at the input / output end, a frequency range of 2 to 20GHz, and -5V / +5V control. It has built-in bias network and DC blocking capacitors, which is easy to use. It has excellent switching characteristics and port standing wave characteristics in the entire operating frequency range, and is very suitable for microwave hybrid integrated circuits, multi-chip modules and low-power systems. The signal 5V / +5V is controlled by the relay controller to control the two input directions, and can be output to the output direction. The two input signals are connected to the output of the host and the standby respectively.

[0055] According to the above technical scheme, the beneficial effects of an S-band low-noise amplifier redundant system provided by the present invention when in use are as follows: the present invention can realize low-noise amplification of low input signals in the S-band; at the same time, hot backup of the S-band can be realized, and if one unit fails, it can be switched to another unit; the noise coefficient and gain are large; remote and local mode operations can be performed through the backup controller; the switch switching function also has manual and automatic functions.

[0056] like Figure 1 As shown, the present invention provides an S-band low noise amplifier redundant system, which comprises: two S-band low noise amplifiers (4, 5), an input switch (1), a backup controller (6), a repeater (2), and an output switch (3).

[0057] Among them, two S-band low noise amplifiers (4, 5) are two S-band low noise amplifier components that can be divided into a host and a backup. The two installation methods have the same appearance and indicators, except that the two CAN addresses are different. The host or the backup is identified during communication. The S-band low noise amplifier is a component that increases the input S-band signal 2200-2300.5MHz by more than 50dB, has a noise coefficient less than 0.75dB, has a 40dB suppression at 2018GHz out of band, and has the ability to communicate with a repeater, and has its own temperature, current, voltage and other parameters; the one input switch (1) and the one output switch (3) respectively switch the input signal to the host or the backup, and the output switch switches the signal from the host or the backup into one output; the one backup controller (6) has an independent key unit, a display unit, a CAN communication module, an LNA communication module, an MCU monitoring unit, a power filter module, a power switch module, a power module, a status indication module, etc. Figure 1 As shown. The power supply module and the power filter module form the power supply part of the backup controller, converting the AC input 220V into +28V. The power switch can turn off and on the power supply to make the backup controller work normally; the gain attenuation of the host and the backup can be set through the key unit of the backup controller and the related working status can be queried. The display module can display whether it is currently working in the host or the backup and the parameters related to the two low noise amplifiers, whether it is currently in local mode or remote mode, and whether the current switch is in automatic switching mode or manual switching mode; the button can also set the state of the switch (switch between the host and the backup) and whether the backup controller belongs to the local mode or the remote mode; the repeater analyzes and judges the information of the host or the backup machine, and makes the switch state setting. For example, if the host fails, the repeater sends a control signal to switch all the input switches and output switches to the backup machine. If there is a problem with the backup machine, it will also switch to the host; the repeater can also communicate with the backup controller through CAN to exchange data.

[0058] In the above scheme, when one of the amplifiers in the S-band low noise amplifier redundant system fails (overcurrent, overtemperature, overvoltage), it automatically switches to another channel to increase redundancy and ensure system reliability. The most important thing in the communication system is reliability, so this redundant system solves the most urgent problem in reality. An S-band low noise amplifier redundant system also has multiple working modes. Local mode and remote mode can be set by buttons. In local mode, the working parameters of the host or standby machine and the status of the input and output switches can be set by buttons. In remote mode, the parameters of the host and standby machines and the switch status are set by LNA in the remote monitoring device. In local mode, the remote mode does not work. The switch can also support automatic mode and manual mode. The automatic mode is that the system independently determines the fault and then switches to the device without fault. It can also be manually switched to the host or standby machine. The S-band low noise amplifier redundant system uses 2200-2300.5MHz radio frequency signals for low noise amplification and filtering functions, has main and standby machine channels, and increases redundancy. If one of the channels is broken, the system automatically controls the switch to switch to another channel, achieving a gain greater than 50dB, a noise coefficient less than 0.75dB, and 40dB suppression at 2018GHz out of band; two S-band low noise amplifiers (4, 5) are as follows Figure 2 As shown, it includes a low noise amplifier filter component 401, a low noise amplifier drive power supply module 402, and a low noise amplifier embedded core control board 403. The low noise amplifier drive power supply module 402 provides power supply and control signals to the low noise amplifier filter component, and the low noise amplifier embedded core control board 403 communicates the parameters related to the low noise amplifier filter component through CAN and the repeater;

[0059] The low noise amplifier and filter component 401 provides a low noise amplifier and filter function at 2200-2300.5MHz, which contains a low noise amplifier and a filter. Figure 3 , including the first stage low noise amplifier 40101, the filter 40102 temperature compensation attenuation 40103 and the second stage low noise amplifier 40104, achieving a gain greater than 50dB, a noise figure less than 0.75dB, and 40dB suppression at 2018GHz out of band. The repeater is to set the relevant parameters and settings of the host and the backup machine. The MCU monitoring unit in the relay control has the function of analysis and judgment. For example, if the host has overcurrent, overtemperature, overvoltage and other faults, the MCU monitoring unit in the relay control automatically sets the input switch and output switch direction to the backup machine, or the backup machine has a fault and automatically switches to the host; the relay controller is a data transfer and a control unit with independent judgment; the repeater exchanges relevant data with the backup controller through the CAN module 3;

[0060] To sum up, the S-band low noise amplifier redundant system provided by the present invention can provide a redundant system that can switch between the main machine and the backup machine during use, which has enhanced reliability, simple structure, convenient outdoor installation, light weight, and multiple switching modes (automatic switching and manual switching) and a wide operating temperature range (-45°C ~ +65°C) to ensure the stability of the received signal and a wide outdoor temperature range.

[0061] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. An S-band low noise amplifier redundant system, characterized in that: It includes a first S-band low noise amplifier, a second S-band low noise amplifier, an input switch, a repeater and an output switch; Wherein: the first S-band low noise amplifier and the second S-band low noise amplifier are used for low noise amplification; the input switch is used to switch the input S-band frequency sweep source signal to the first S-band low noise amplifier and the second S-band low noise amplifier; the first S-band low noise amplifier and the second S-band low noise amplifier process the input signal and then output the S-band output signal through the output switch; when the first S-band low noise amplifier and the second S-band low noise amplifier are working, one of them serves as the main machine and the other serves as the standby machine; The repeater is respectively connected to the first S-band low noise amplifier, the second S-band low noise amplifier, the input switch, and the output switch to control the switching state of the input switch and the output switch and the working state of the first S-band low noise amplifier and the second S-band low noise amplifier.

2. The S-band low noise amplifier redundant system as claimed in claim 1, characterized in that: The redundant system also includes a backup controller, which is connected to the repeater; the backup controller is used to connect to the repeater to set the working parameters of the low noise amplifier, and the repeater communicates with the backup controller over a long distance to control the switching of input and output switch components and the main and standby working states of the first and second S-band low noise amplifiers.

3. The S-band low noise amplifier redundant system as claimed in claim 2, characterized in that: The backup controller performs status setting and parameter query through buttons and LCD display or exchanges data with the station control system through LNA, and reports the redundant system parameters to the station control system. The station control system sets the parameters of the low noise amplifier through LNA and switches the input and output switches.

4. An S-band low noise amplifier redundant system as described in any one of claims 1 to 3, characterized in that: The first S-band low noise amplifier and / or the second S-band low noise amplifier comprises a low noise amplifier embedded core control board, a low noise amplifier drive power supply module and a low noise amplifier filter component; The low-noise amplification and filtering component comprises a first-stage low-noise amplifier, a filter, a temperature-compensated attenuator and a second-stage amplifier; the S-band signal passes through the first-stage low-noise amplifier, the filter, the temperature-compensated attenuator and the second-stage amplifier in sequence and then outputs a signal after low-noise amplification; The low noise amplifier embedded core control board is used to monitor the current, voltage, ambient temperature of the low noise amplifier filter component and control the temperature compensation attenuator to perform temperature compensation gain compensation and other parameters, and communicate and exchange data with the repeater through CAN; The low noise amplifier driving power supply module is used to supply power to the first-stage low noise amplifier and the second-stage amplifier of the low noise amplifier filter component; and providing a voltage to a control pin of the temperature-compensated attenuator so as to change the gain of the component and perform temperature-compensated gain compensation; The low noise amplifier driving power supply module also includes a detection module for detecting voltage and current, and sends the detected current and voltage parameters to the low noise amplifier embedded core control board for analysis and interpretation to determine the working status of the S-band low noise amplifier and report it to the repeater.

5. An S-band low noise amplifier redundant system as claimed in any one of claims 1 to 3, characterized in that: The backup controller includes: a power filter, a power switch, a power module, a status indicator, a button unit, an MCU monitoring unit, a display unit, an Ethernet port module, and a CAN module; the AC power is input to the input end of the power filter, and the output end of the power filter is connected to the MCU monitoring unit after passing through the power switch and the power module in sequence; the MCU monitoring unit is respectively connected to the status indicator unit, the display unit, and the button unit; the MCU monitoring unit expands network communication through the Ethernet port module; the MCU monitoring unit expands CAN network communication through the CAN module; The status indication unit communicates with the MCU monitoring unit to display the working status of the system; The MCU monitoring unit is connected to the key unit and the display unit, and the relevant parameters are set through the key unit; the attenuation value of the host or standby machine is set by keys, and the relevant parameters can be queried through the key unit. The display unit is used to display the working status information of the current redundant control system; The network port module and the CAN module exchange information through the dedicated transmission chip and the MCU monitoring unit respectively, so as to realize the backup controller connecting to the repeater through the CAN network and connecting to the remote monitoring device through the network port.

6. An S-band low noise amplifier redundant system as claimed in claim 5, characterized in that: The remote monitoring device and the backup controller work in a master / slave query mode, with the remote monitoring device as the master device and the backup controller as the slave device. The slave device does not provide an active reporting function. The backup controller does not need to preset the network interface configuration of the remote monitoring device. It can respond according to the source address of the remote monitoring device request message. The remote monitoring device registers the interface information of the low noise amplifier. The remote monitoring device sends a query or setting request to the low noise amplifier according to the preset information and receives the response information of the backup controller.

7. The S-band low noise amplifier redundant system as claimed in claim 1, characterized in that: The repeater includes an MCU monitoring unit, a status indication unit, a CAN module 1, a CAN module, and a CAN module 3. The MCU monitoring unit is connected to the status indication unit to indicate the working status of the repeater; the MCU monitoring unit is respectively connected to the CAN module 1, the CAN module, and the CAN module 3, and is respectively connected to the first S-band low noise amplifier, the second S-band low noise amplifier, and the backup controller through three CAN interfaces.

8. The S-band low noise amplifier redundant system as claimed in claim 1, characterized in that: The input switch comprises: an input switch chip, which is a reflective single-pole double-throw switch chip, and controls two output directions through a relay controller to achieve output to a host machine or a standby machine.

9. The S-band low noise amplifier redundant system as claimed in claim 1, characterized in that: The output switch comprises: an output switch chip, which is a reflective single-pole double-throw switch chip. The two input directions are controlled by a relay controller to control the two input signals to be connected to the outputs of the host machine and the standby machine respectively.

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