Signal amplifier and radio frequency wireless system

Abstract

The invention discloses a signal amplifier and a radio frequency wireless system, the signal amplifier comprises a near-end display assembly and a far-end active amplification assembly, and the near-end display assembly is in communication connection with the far-end active amplification assembly; the far-end active amplification assembly comprises a far-end communication module, a far-end monitoring module, a far-end controller, a far-end amplification module, a far-end power supply module and a far-end high-gain antenna; the far-end controller is used for generating a sending signal and receiving a radio frequency signal in a 2.4 G / 5.8 G frequency band; the far-end amplification module is electrically connected with the far-end controller, the far-end high-gain antenna is electrically connected with the far-end amplification module, the far-end monitoring module is electrically connected with the far-end controller and the far-end communication module, and the far-end power supply module is electrically connected with the far-end communication module, the far-end monitoring module, the far-end amplification module and the far-end controller. The technical scheme of the invention has the advantages of stable signal, high gain, high efficiency and high reliability, and can realize the remote control demand.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency technology, and in particular to a signal amplifier and a radio frequency wireless system. Background Art

[0002] At present, ISM bands such as 2.4G / 5.8G can be used in industrial applications, scientific research, medical treatment and other fields. Through wireless coverage of a certain area, communication between RF devices can be achieved, such as WIFI Internet access, Bluetooth communication, drone communication, etc. In conventional applications, the communication distance of RF devices is very limited due to factors such as the size and power consumption of RF devices. For example, the actual communication distance of conventional agricultural drones and power inspection drones is between 3-5KM. Even under the premise of gradually increasing demand for endurance, the wireless coverage range of RF devices in existing technologies is still limited and cannot meet applications at longer distances.

[0003] In view of this, it is necessary to propose further improvements to current radio frequency equipment. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the main purpose of the present invention is to provide a signal amplifier and a radio frequency wireless system.

[0005] To achieve the above object, a technical solution adopted by the present invention is: to provide a signal amplifier, comprising: a near-end display component and a far-end active amplifier component, wherein the near-end display component and the far-end active amplifier component are separated and arranged, and the near-end display component and the far-end active amplifier component are communicatively connected;

[0006] The remote active amplification component includes a remote communication module, a remote monitoring module, a remote controller, a remote amplification module, a remote power module and a remote high-gain antenna;

[0007] The remote controller is used to generate a transmission signal according to preset parameters and transmit it to the remote amplifier module, and receive the 2.4G / 5.8G frequency band radio frequency signal amplified by the remote amplifier module;

[0008] The remote amplifier module is electrically connected to the remote controller, and is used to amplify the transmitted signal to obtain a target signal with a nominal power intensity, and transmit it to the remote high-gain antenna, and amplify the 2.4G / 5.8G frequency band radio frequency signal sent by the drone and received by the remote high-gain antenna;

[0009] The remote high-gain antenna is electrically connected to the remote amplification module, and is used to receive the target signal transmitted by the remote amplification module, and send the target signal outward to cover the preset area where the drone flies, and receive the 2.4G / 5.8G frequency band radio frequency signal sent outward by the drone when flying in the preset area;

[0010] The remote monitoring module is electrically connected to the remote controller and the remote communication module respectively, and is used to monitor the working status of the remote amplification module, the remote power module, the remote controller and the remote high-gain antenna in real time, and transmit the status to the near-end display component through the remote communication module;

[0011] The remote power supply module is electrically connected to the remote communication module, the remote monitoring module, the remote amplification module and the remote controller respectively.

[0012] Wherein, the remote amplification module includes a first transmitting component and a first receiving component;

[0013] The first transmitting component includes a first low-power RF switch, a first pre-driver, a first driver, a first power amplifier, a first circulator and a first high-power RF switch connected in sequence, the first low-power RF switch is used to electrically connect to the remote controller, and the first circulator is electrically connected to the remote high-gain antenna;

[0014] The first receiving component includes a first limiter, a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter connected in sequence, the first limiter is electrically connected to a first high-power RF switch, and the first bandpass filter is electrically connected to a first low-power RF switch.

[0015] Wherein, the remote amplification module further includes a second transmitting component and a second receiving component;

[0016] The second transmitting component includes a second low-power RF switch, a second pre-driver, a second driver, a second power amplifier, a second circulator and a second high-power RF switch connected in sequence, the second low-power RF switch is used to electrically connect to the remote controller, and the second circulator is electrically connected to the remote high-gain antenna;

[0017] The second receiving component includes a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, the second limiter is electrically connected to a second high-power RF switch, and the second bandpass filter is electrically connected to a second low-power RF switch.

[0018] Among them, the remote amplification module also includes a third bandpass filter, a fourth bandpass filter and a duplexer, the third bandpass filter is electrically connected to the first low-power RF switch, the fourth bandpass filter is electrically connected to the second low-power RF switch, and the duplexer is electrically connected to the third bandpass filter and the fourth bandpass filter respectively, and the duplexer is used to wirelessly connect to the AP access device, wherein the AP access device is a remote control or an external controller.

[0019] The first transmitting component further includes a first RF load, and a first coupler, a first RF power detector and a first gain amplifier connected in sequence, wherein the first coupler is used to be electrically connected to the remote controller, the first gain amplifier is used to be electrically connected to a first low-power RF switch, and the first RF load is electrically connected to a first high-power RF switch;

[0020] The second transmitting component also includes a second RF load, and a second coupler, a second RF power detector and a second gain amplifier connected in sequence, the second coupler is used to be electrically connected to the remote controller, the second gain amplifier is used to be electrically connected to a second low-power RF switch, and the second RF load is electrically connected to a second high-power RF switch;

[0021] The first high-power RF switch is used to connect the first RF load when transmitting a signal and to connect the first limiter when receiving a RF signal; the second high-power RF switch is used to connect the second RF load when transmitting a signal and to connect the second limiter when receiving a RF signal.

[0022] Wherein, the first transmitting assembly further comprises a first lightning arrester, one end of the first lightning arrester is electrically connected to the first circulator, and the other end of the first lightning arrester is grounded;

[0023] The second transmitting assembly also includes a second lightning arrester, one end of the second lightning arrester is electrically connected to the second circulator, and the other end of the second lightning arrester is grounded.

[0024] Among them, the first high-power RF switch includes a switch chip, a first metal MOS transistor, a second metal MOS transistor, a first inductor, a second inductor, a third inductor and a fourth inductor. The receiving end of the first switch chip is respectively connected to one end of the first inductor and the third inductor, the other end of the first inductor is grounded, the other end of the third inductor is connected to the drain of the second metal MOS transistor, the gate of the second metal MOS transistor is connected to a preset voltage, and the source is grounded. The transmitting end of the first switch chip is connected to one end of the second inductor, the other end of the second inductor is connected to the drain of the first metal MOS transistor, the gate of the first metal MOS transistor is connected to a preset voltage, and the source is grounded. The antenna end of the first switch chip is connected to a bias voltage through the fourth inductor.

[0025] The remote amplification module further includes a second transmitting component and a second receiving component, the second transmitting component includes a transmitting selection switch, a second pre-driver, a second driver and a second power amplifier connected in sequence, and the second power amplifier is electrically connected to the first limiter; the transmitting selection switch is electrically connected to the first low-power RF switch, and is used to select the first transmitting path or the second transmitting path according to the transmitting signal, wherein the first transmitting path is the first pre-driver, the first driver and the first power amplifier; the second transmitting path is the second pre-driver, the second driver and the second power amplifier;

[0026] The second receiving component also includes a receiving selection switch, a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, and the receiving selection switch is electrically connected to the second high-power RF switch, wherein the receiving selection switch is used to select the first receiving path or the second receiving path according to the received RF signal, wherein the first receiving path is a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter; the second receiving path is a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter.

[0027] The first transmitting component further comprises a transmitting gating switch, a transmitting gain compensator and a second power amplifier, wherein a first end of the transmitting gating switch is electrically connected to the first driver, a second end of the transmitting gating switch is electrically connected to the first power amplifier, a third end of the transmitting gating switch is electrically connected to the transmitting gain compensator, the transmitting gain compensator is electrically connected to the second power amplifier, and the second power amplifier is connected to the first circulator;

[0028] It also includes a second receiving component, which includes a receiving selection switch, a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, and the receiving selection switch is electrically connected to the second high-power RF switch, wherein the receiving selection switch is used to select the first receiving path or the second receiving path according to the received RF signal, wherein the first receiving path is a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter; the second receiving path is a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter.

[0029] To achieve the above-mentioned purpose, another technical solution adopted by the present invention is: to provide a radio frequency wireless system, including a drone, a signal amplifier and an AP access device, wherein the signal amplifier is electrically connected to the drone and the AP access device respectively, and the signal amplifier is the above-mentioned signal amplifier.

[0030] The technical solution of the present invention adopts a proximal display component and a remote active amplifier component that is communicatively connected to the proximal display component. The proximal display component can display the working status of each remote module, which is convenient for real-time control. The remote active amplifier component can amplify the power of the radio frequency signal. Specifically, the remote active amplifier component includes a remote communication module, a remote monitoring module, a remote amplifier module, a remote power module and a remote high-gain antenna. The remote amplifier module can amplify the received radio frequency signal, and after reaching the nominal power intensity, it is emitted through the remote high-gain antenna and covers a larger area. The remote monitoring module can monitor the operation of the remote amplifier module, the remote power module and the remote high-gain antenna, and perform real-time control. The remote communication module can transmit the working status of each module to the proximal display component. Through the implementation of the above technical solution, it has the advantages of stable signal, high gain, high efficiency and high reliability, and can meet the long-distance control requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of a module of a signal amplifier according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a remote amplification module according to an embodiment of the present invention;

[0034] Figure 3 This is a partial circuit diagram of a remote amplifier module according to an embodiment of the present invention;

[0035] Figure 4 This is a circuit diagram of a first high-power radio frequency switch according to an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of some modules of a remote amplification module according to another embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of some modules of a remote amplification module according to another embodiment of the present invention;

[0038] Figure 7 FIG. 4 is a module diagram of a radio frequency system according to an embodiment of the present invention.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] It should be noted that the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Different from the related technologies, which are limited by the size and power consumption of equipment, the communication distance of radio frequency equipment is very limited. For example, the actual communication distance of conventional agricultural drones and power inspection drones is between 3-5KM. Under the premise of gradually increasing demand for endurance, the radio frequency equipment of the prior art cannot meet the problem of longer-distance applications. The present invention provides a signal amplifier, which aims to improve power, receiving sensitivity, antenna and other technical indicators, and comprehensively optimize the communication distance by 2-3 times, which is suitable for special scenarios requiring long-distance communication. Please refer to the following embodiments for the specific structure of the signal amplifier.

[0043] Please refer to Figure 1 to Figure 2 , Figure 1 This is a schematic diagram of a module of a signal amplifier according to an embodiment of the present invention; Figure 2 The module schematic diagram of the remote amplification module of an embodiment of the present invention. In the embodiment of the present invention, the signal amplifier includes: a near-end display component 100 and a remote active amplification component 200, wherein the near-end display component 100 and the remote active amplification component 200 are separated and arranged, and the near-end display component 100 and the remote active amplification component 200 are communicatively connected;

[0044] The remote active amplifier component 200 includes a remote active amplifier component 206, a remote monitoring module 205, a remote controller 201, a remote amplifier module 202, a remote power module 204 and a remote high-gain antenna 203; the remote controller 201 is used to generate a transmission signal according to preset parameters and transmit it to the remote amplifier module 202, and receive the 2.4G / 5.8G frequency band radio frequency signal amplified by the remote amplifier module 202; the remote amplifier module 202 is electrically connected to the remote controller 201, and is used to amplify the transmission signal to obtain a target signal with a nominal power intensity, and transmit it to the remote high-gain antenna 203, and amplify the 2.4G / 5.8G frequency band radio frequency signal sent by the drone received by the remote high-gain antenna 203; the remote high-gain antenna 203 .... The remote amplifier module 202 is electrically connected to receive the target signal transmitted by the remote amplifier module 202 and send the target signal outward to cover the preset area where the drone flies, and receive the 2.4G / 5.8G frequency band radio frequency signal sent outward by the drone when flying in the preset area; the remote monitoring module 205 is electrically connected to the remote controller 201 and the remote active amplifier component 206 respectively, and is used to monitor the working status of the remote amplifier module 202, the remote power module 204, the remote controller 201 and the remote high-gain antenna 203 in real time, and transmit it to the proximal display component 100 through the remote active amplifier component 206; the remote power module 204 is electrically connected to the remote active amplifier component 206, the remote monitoring module 205, the remote amplifier module 202 and the remote controller 201 respectively.

[0045] In this embodiment, the signal amplifier mainly includes a near-end display component 100 and a far-end active amplifier component 200, and the near-end display component 100 and the far-end active amplifier component 200 are connected by power line communication. The power line is both a power line and a communication line. The near-end display component 100 is powered by the far-end active amplifier component 200 through the power line, and no additional power supply is required. Specifically, the near-end display component 100 and the far-end active amplifier component 200 are suitable for remote use, and the longest extension distance of the power line is 50m. The near-end display component 100 can realize a simple and intuitive view of the working status of each module in the far-end active amplifier component 200, which is convenient for real-time control and has strong anti-interference. Specifically, the near-end display component 100 can also be provided with setting parameters for each module in the far-end active amplifier component 200. When the data of any module in the far-end active amplifier component 200 is abnormal, an alarm message can be issued to remind the user. The alarm signal can be in the form of lighting, sound, vibration, etc.

[0046] The remote active amplifier component 200 mainly includes a remote active amplifier component 206, a remote monitoring module 205, a remote amplifier module 202, a remote power module 204, a remote controller 201 and a remote high-gain antenna 203. Among them, the remote amplifier module 202 receives the radio frequency signal transmitted by the remote controller 201, the radio frequency signal has a small power, and amplifies the radio frequency signal. When the radio frequency signal reaches the nominal power intensity, it is transmitted through the remote high-gain antenna 203 and covers the flight area of ​​the drone. The remote high-gain antenna 203 adopts a copper vibrator design, which improves the signal-to-noise ratio of the useful signal, making it more difficult for the cluttered signals in the external environment to interfere with the useful communication signal. It has the characteristics of high gain, high efficiency, and high reliability, and supports 2.4G and 5.8G dual-band frequencies. The remote monitoring module 205 monitors the working status of the remote amplification module 202, the remote power module 204, the remote controller 201 and the remote high-gain antenna 203 in real time, and transmits the information to the near-end display component 100 through the remote active amplification component 206. The remote power module 204 can convert the input voltage to provide a reasonable voltage for the remote active amplification component 206, the remote monitoring module 205, the remote amplification module 202 and the remote high-gain antenna 203. Specifically, it can convert the high voltage of the external power supply into the low voltage required by each module in the signal amplifier to ensure the stability of the equipment operation.

[0047] In a specific embodiment, the remote amplification module 202 includes a first transmitting component and a first receiving component; the first transmitting component includes a first low-power RF switch 211, a first pre-driver 212, a first driver 213, a first power amplifier 214, a first circulator 215 and a first high-power RF switch 216 connected in sequence, the first low-power RF switch 211 is used to electrically connect to the remote controller, and the first circulator 215 is electrically connected to the remote high-gain antenna 203; the first receiving component includes a first limiter 219, a high-pass filter 220, a first pre-low-noise amplifier 221, a first pre-bandpass filter 222, a first low-noise gain amplifier 223 and a first bandpass filter 224 connected in sequence, the first limiter 219 is electrically connected to the first high-power RF switch 216, and the first bandpass filter 224 is electrically connected to the first low-power RF switch 211. Among them, the first low-power RF switch 211, the first pre-driver 212, the first driver 213, the first power amplifier 214, the first circulator 215 and the first high-power RF switch 216 form a first transmission path. When transmitting a signal, the first low-power RF switch 211 and the first high-power RF switch 216 select the first transmission path. At this time, the first pre-driver 212 and the first driver 213 respectively amplify the transmission signal step by step. After the first power amplifier 214 amplifies the transmission signal to the nominal power intensity, it is transmitted to the remote high-gain antenna 203 through the first circulator 215 and transmitted by the remote high-gain antenna 203. At this time, the first high-power RF switch 216 turns off the first receiving path. The first high-power RF switch 216, the first limiter 219, the high-pass filter 220, the first pre-low-noise amplifier 221, the first pre-bandpass filter 222, the first low-noise gain amplifier 223, the first bandpass filter 224 and the first low-power RF switch 211 form a first receiving path. When receiving a signal, the first low-power RF switch 211 turns off the first transmitting path, and the received RF signal is adjusted by the amplitude of the first limiter 219, and the high-pass filter 220, the first pre-low-noise amplifier 221, the first pre-bandpass filter 222, the first low-noise gain amplifier 223, and the first bandpass filter 224 are filtered and amplified step by step, and then transmitted to the remote controller 201 to complete the communication interaction. The first transmitting component and the first receiving component are used to transmit or receive RF signals in the 5.8G or 2.4G frequency band. The above-mentioned first pre-low-noise amplifier 221 and the first low-noise gain amplifier 223 are used to amplify the signal step by step to avoid signal distortion.

[0048] In a specific embodiment, the remote amplification module 202 further includes a second transmitting component and a second receiving component;

[0049] The second transmitting component includes a second low-power RF switch 231, a second pre-driver 232, a second driver 233, a second power amplifier 234, a second circulator 235 and a second high-power RF switch 236 connected in sequence, the second low-power RF switch 231 is used to electrically connect to the remote controller 201, and the second circulator 235 is electrically connected to the remote high-gain antenna 203;

[0050] The second receiving component includes a second limiter 239, a low-pass filter 240, a second low pre-noise amplifier 241, a second pre-bandpass filter 242, a second low-noise gain amplifier 243 and a second bandpass filter 244 connected in sequence, the second limiter 239 is electrically connected to the second high-power RF switch 236, and the second bandpass filter 244 is electrically connected to the second low-power RF switch 231. The function of the second transmitting component is similar to that of the first transmitting component, and the function of the first receiving component is similar to that of the second receiving component. Please refer to the above embodiment for the specific principle and will not be repeated here. It should be understood that the first transmitting component and the first receiving component are used to transmit or receive RF signals in the 5.8G frequency band, and the second transmitting component and the second receiving component are used to transmit or receive RF signals in the 2.4G frequency band.

[0051] In a specific embodiment, the remote amplifier module 202 further includes a third bandpass filter 228, a fourth bandpass filter 248 and a duplexer 229, wherein the third bandpass filter 228 is electrically connected to the first low-power RF switch 211, the fourth bandpass filter 248 is electrically connected to the second low-power RF switch 231, and the duplexer 229 is electrically connected to the third bandpass filter 228 and the fourth bandpass filter 248, respectively, and the duplexer 229 is used to wirelessly connect to an AP access device, wherein the AP access device is a remote controller or an external controller. The remote controller or the external controller can send a 5.8G or 2.4G RF signal to the outside, and the 2.4G or 5.8G RF signal is received by the duplexer 229, and enters the remote controller 201 through the duplexer 229, the third bandpass filter 228 or the fourth bandpass filter 248, thereby controlling the transmission of the signal. The third bandpass filter 228 and the fourth bandpass filter 248 can filter out the 2.4G and 5.8G frequency bands, respectively. The external controller may be built into a smart device, which includes a smart phone, a Pad, etc.

[0052] In a specific embodiment, the first transmitting component further includes a first RF load 218, and a first coupler 227, a first RF power detector 226 and a first gain amplifier 225 connected in sequence, wherein the first coupler 227 is used to be electrically connected to the remote controller 201, the first gain amplifier 225 is used to be electrically connected to the first low-power RF switch 211, and the first RF load 218 is electrically connected to the first high-power RF switch 216;

[0053] The second transmitting component also includes a second RF load 238, and a second coupler 247, a second RF power detector 246 and a second gain amplifier 245 connected in sequence, wherein the second coupler 247 is used to be electrically connected to the remote controller 201, the second gain amplifier 245 is used to be electrically connected to the second low-power RF switch 231, and the second RF load 238 is electrically connected to the second high-power RF switch 236; wherein the first high-power RF switch 216 is used to turn on the first RF load 218 and turn off the first limiter 219 when transmitting a signal, and turn on the first limiter 219 and turn off the first RF load 218 when receiving a RF signal; the second high-power RF switch 236 is used to turn on the second RF load 238 and turn off the second limiter 239 when transmitting a signal, and turn on the second limiter 239 and turn off the second RF load 238 when receiving a RF signal. The first RF load 218 and the second RF load 238 are respectively in a working state when transmitting a signal and are used to absorb power; and are in a disconnected state when receiving a signal. The first RF load 218 and the second RF load 238 are intended to protect the receiving path components to prevent the receiving path components from being damaged when a high-power signal is transmitted.

[0054] In a specific embodiment, the first transmitting assembly further includes a first lightning arrester 217, one end of which is electrically connected to the first circulator 215, and the other end of which is grounded; the second transmitting assembly further includes a second lightning arrester 237, one end of which is electrically connected to the second circulator 235, and the other end of which is grounded. When in use, the remote active amplifier assembly 200 of the signal amplifier is usually installed at a high place, and the first lightning arrester 217 and the second lightning arrester 237 can effectively prevent lightning strikes from damaging the equipment.

[0055] Please refer to Figure 3 and Figure 4 , Figure 3 This is a partial circuit diagram of a remote amplifier module according to an embodiment of the present invention; Figure 4 FIG. 4 is a circuit diagram of a first high-power radio frequency switch according to an embodiment of the present invention. Figure 3In the embodiment, the first power amplifier 10, the first circulator 20, the first high-power RF switch 40, and the first limiter 30 are connected to each other. The circuit of the first high-power RF switch 216 is described in detail below. Figure 4 In one embodiment, the first high-power RF switch 216 includes a switch chip U1, a first metal MOS transistor Q1, a second metal MOS transistor Q2, a first inductor L1, a second inductor L2, a third inductor L3 and a fourth inductor L4. The receiving end of the first switch chip U1 is connected to one end of the first inductor L1 and one end of the third inductor L3 respectively, the other end of the first inductor L1 is grounded, the other end of the third inductor L3 is connected to the drain of the second metal MOS transistor Q2, the gate of the second metal MOS transistor Q2 is connected to a preset voltage, and the source is grounded. The transmitting end of the first switch chip U1 is connected to one end of the second inductor L2, the other end of the second inductor L2 is connected to the drain of the first metal MOS transistor Q1, the gate of the first metal MOS transistor Q1 is connected to a preset voltage, and the source is grounded. The antenna end of the first switch chip U1 is connected to a bias voltage through the fourth inductor L4.

[0056] The switch chip U1 can control the on and off of the first metal MOS transistor Q1 and the second metal MOS transistor Q2. When the first metal MOS transistor Q1 is turned on and the second metal MOS transistor Q2 is turned off, the transmitting end of the switch chip U1 is in a high level state, and the entire circuit is in a transmitting path. When the first metal MOS transistor Q1 is turned off and the second metal MOS transistor Q2 is turned on, the receiving end of the switch chip U1 is in a high level state, and the entire circuit is in a receiving path. The first inductor L1 can provide a bias voltage, and the second inductor L2, the third inductor L3 and the fourth inductor L4 mainly play a decoupling effect.

[0057] In a specific embodiment, the signal amplifier further includes a heat dissipation housing and a mounting bracket installed on the outside of the heat dissipation housing, and the remote communication module 206, the remote monitoring module 205, the remote amplification module 202, the remote power module 204, the remote controller 201 and the remote high-gain antenna 203 are installed in the heat dissipation housing; the signal amplifier includes two groups of transmitting components and receiving components, forming four communication channels to work independently. The heat dissipation housing is made of high-purity aluminum CNC processing, with sufficient heat dissipation margin, capable of timely heat dissipation, and stable and reliable operation. The first power amplifier 214 and the second power amplifier 234 of the signal amplifier of this scheme use gallium nitride GaN, which can effectively improve the overall efficiency of the power amplifier. The signal amplifier supports 2.4G+5.8G dual channels, two groups of modules support 4T4R, and 4 channels work independently, which can improve work efficiency. This scheme has high integration, including 2.4G+5.8G 2 T2R modes, a total of 4 transmitting channels, and the output power of each channel is greater than 10W, which is difficult to design. In some solutions, an independent single-frequency high-power module solution is used. If 2.4G+5.8G 2 T2R is required to achieve the effect of this solution, the volume will be large and difficult to miniaturize. Another example is the 1T1R solution, which has poor anti-interference performance against RF signal fading. You can also use the 2T2R low-power solution. Although this solution is small in size, it has low output power, which reduces the communication distance and anti-interference performance.

[0058] In a specific embodiment, the remote high-gain antenna 203 is a copper vibrator. Compared with ordinary vibrator antennas, the use of copper vibrators as remote high-gain antennas 203 has the characteristics of high gain, high efficiency, and high reliability. The remote high-gain antenna 203 of this solution supports 2.4G and 5.8G dual-band frequencies, with a power capacity greater than 50W, and can cover the application area. The actual test of the DJI Mavic 3 drone, without this product, the effective maximum flight distance is less than 5KM. After using this product on the remote control end, the actual flight distance is greater than 20KM. The signal is stable during the flight and has strong anti-interference ability. It can be widely used in agriculture, power inspection, forest fire prevention and other scenes that require long-distance applications.

[0059] It can be understood that in addition to communicating with drones, this device can also carry radio frequency products such as mechanical dogs and unmanned boats.

[0060] Please refer to Figure 2 and Figure 5 , Figure 2 is a schematic diagram of a remote amplification module according to an embodiment of the present invention. Figure 5This is a schematic diagram of some modules of a remote amplifier module of another embodiment of the present invention. In a specific embodiment, the remote amplifier module 202 also includes a second transmitting component and a second receiving component, the second transmitting component includes a transmitting selection switch 250, a second pre-driver 232, a second driver 233 and a second power amplifier 234 connected in sequence, and the second power amplifier 234 is electrically connected to the first limiter 219; the transmitting selection switch 250 is electrically connected to the first low-power RF switch 211, and is used to select the first transmitting path or the second transmitting path according to the transmitting signal, wherein the first transmitting path is the first pre-driver 212, the first driver 213 and the first power amplifier 214; the second transmitting path is the second pre-driver 232, the second driver 233 and the second power amplifier 234;

[0061] The second receiving component also includes a receiving selection switch 260, a second limiter 239, a low-pass filter 240, a second low pre-noise amplifier 241, a second pre-bandpass filter 242, a second low-noise gain amplifier 243 and a second bandpass filter 244 connected in sequence, and the receiving selection switch 260 is electrically connected to the second high-power RF switch 236, wherein the receiving selection switch 260 is used to select the first receiving path or the second receiving path according to the received RF signal, the first receiving path is a high-pass filter 220, a first pre-low-noise amplifier 221, a first pre-bandpass filter 222, a first low-noise gain amplifier 223 and a first bandpass filter 224; the second receiving path is a low-pass filter 240, a second low pre-noise amplifier 241, a second pre-bandpass filter 242, a second low-noise gain amplifier 243 and a second bandpass filter 244.

[0062] In this embodiment, the first end of the transmission gating switch 250 is connected to the first low-power RF switch 211, the second end of the transmission gating switch 250 is connected to the first pre-driver 212, and the third end of the transmission gating switch 250 is connected to the second pre-driver 232. The transmission gating switch 250 selects the first transmission path when receiving a 5.8G RF signal, and selects the second transmission path when receiving a 2.4G RF signal; the first end of the reception gating switch 260 is connected to the first high-power RF switch 216, the second end of the reception gating switch 260 is connected to the high-pass filter 219, and the third end of the reception gating switch 260 is connected to the low-pass filter 239. The reception gating switch 260 selects the first reception path when receiving a 5.8G RF signal, and selects the second reception path when receiving a 2.4G RF signal. By setting the transmission enable switch 250 and the reception enable switch 260, the two transmission paths and the reception path can share the first coupler 227, the first RF power detector 226 and the first gain amplifier 225, the first low-power RF switch 211, the first high-power RF switch 216, the first circulator 215, the first RF load 218 and the first lightning arrester 217, which can greatly save electronic components and reduce production costs.

[0063] Please refer to Figure 2 and Figure 6 , Figure 2 is a schematic diagram of a remote amplification module according to an embodiment of the present invention. Figure 6 This is a partial module schematic diagram of a remote amplification module of another embodiment of the present invention. In a specific embodiment, the first transmitting component further includes a transmitting gating switch 250, a transmitting gain compensator 236 and a second power amplifier 234, the first end of the transmitting gating switch 250 is electrically connected to the first driver 213, the second end of the transmitting gating switch 250 is electrically connected to the first power amplifier 214, the third end of the transmitting gating switch 250 is electrically connected to the transmitting gain compensator 236, the transmitting gain compensator 236 is electrically connected to the second power amplifier 234, and the second power amplifier 234 is connected to the first circulator 215;

[0064] It also includes a second receiving component, which includes a receiving selection switch 260, a second limiter 239, a low-pass filter 240, a second low pre-noise amplifier 241, a second pre-bandpass filter 242, a second low-noise gain amplifier 243 and a second bandpass filter 244 connected in sequence, and the receiving selection switch 260 is electrically connected to the second high-power RF switch 236, wherein the receiving selection switch 260 is used to select the first receiving path or the second receiving path according to the received RF signal, the first receiving path is a high-pass filter 220, a first pre-low-noise amplifier 221, a first pre-bandpass filter 222, a first low-noise gain amplifier 223 and a first bandpass filter 224; the second receiving path is a low-pass filter 240, a second low pre-noise amplifier 241, a second pre-bandpass filter 242, a second low-noise gain amplifier 243 and a second bandpass filter 244.

[0065] The receiving selection switch 260 of this embodiment is the same as the above embodiment, and the transmitting selection switch 250 is similar to the above embodiment. Specifically, the first transmitting component can form two transmitting paths, respectively transmitting 5.8G / 2.4G radio frequency signals, and the first receiving component and the second receiving component can form two receiving paths, respectively receiving 5.8G / 2.4G radio frequency signals. The working principle of the first transmitting component is as follows: when transmitting a 5.8G radio frequency signal, the transmitting selection switch 250 selects the first pre-driver 212, the first driver 213 and the first power amplifier 214 to transmit a frequency band 5.8G signal; when transmitting a 2.4G radio frequency signal, the first pre-driver 212, the first driver 213, the transmitting gain compensator 236 and the first power amplifier 214 are selected to transmit a 2.4G frequency band signal. The two transmitting paths can share the first pre-driver 212 and the first driver 213, which can further save components and greatly reduce production costs.

[0066] Please refer to Figure 7 , Figure 7 It is a module diagram of a radio frequency system of an embodiment of the present invention. In an embodiment of the present invention, the radio frequency wireless system includes a drone 500, a signal amplifier 400 and an AP access device 300, wherein the signal amplifier 400 is electrically connected to the drone 500 and the AP access device 300, respectively, and the signal amplifier 400 includes the above-mentioned signal amplifier 400. Please refer to the above-mentioned embodiment for the specific structure of the signal amplifier 400, which will not be described in detail here. Since the radio frequency wireless system of this scheme adopts all the technical solutions of all the above-mentioned embodiments of the signal amplifier 400, it has at least all the advantages and beneficial effects brought by the technical solutions of the above-mentioned embodiments of the signal amplifier 400, which will not be described one by one here.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical solution of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A signal amplifier, characterized in that: include: A near-end display component and a far-end active amplifying component, wherein the near-end display component and the far-end active amplifying component are separated and arranged, and the near-end display component and the far-end active amplifying component are communicatively connected; The remote active amplification component includes a remote communication module, a remote monitoring module, a remote controller, a remote amplification module, a remote power module and a remote high-gain antenna; The remote controller is used to generate a transmission signal according to preset parameters and transmit it to the remote amplifier module, and receive the 2.4G / 5.8G frequency band radio frequency signal amplified by the remote amplifier module; The remote amplifier module is electrically connected to the remote controller, and is used to amplify the transmitted signal to obtain a target signal with a nominal power intensity, and transmit it to the remote high-gain antenna, and amplify the 2.4G / 5.8G frequency band radio frequency signal sent by the drone and received by the remote high-gain antenna; The remote high-gain antenna is electrically connected to the remote amplification module, and is used to receive the target signal transmitted by the remote amplification module, and send the target signal outward to cover the preset area where the drone flies, and receive the 2.4G / 5.8G frequency band radio frequency signal sent outward by the drone when flying in the preset area; The remote monitoring module is electrically connected to the remote controller and the remote communication module respectively, and is used to monitor the working status of the remote amplification module, the remote power module, the remote controller and the remote high-gain antenna in real time, and transmit the status to the near-end display component through the remote communication module; The remote power supply module is electrically connected to the remote communication module, the remote monitoring module, the remote amplification module and the remote controller respectively.

2. The signal amplifier according to claim 1, characterized in that: The remote amplification module includes a first transmitting component and a first receiving component; The first transmitting component includes a first low-power RF switch, a first pre-driver, a first driver, a first power amplifier, a first circulator and a first high-power RF switch connected in sequence, the first low-power RF switch is used to electrically connect to the remote controller, and the first circulator is electrically connected to the remote high-gain antenna; The first receiving component includes a first limiter, a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter connected in sequence, the first limiter is electrically connected to a first high-power RF switch, and the first bandpass filter is electrically connected to a first low-power RF switch.

3. The signal amplifier according to claim 2, characterized in that: The remote amplification module also includes a second transmitting component and a second receiving component; The second transmitting component includes a second low-power RF switch, a second pre-driver, a second driver, a second power amplifier, a second circulator and a second high-power RF switch connected in sequence, the second low-power RF switch is used to electrically connect to the remote controller, and the second circulator is electrically connected to the remote high-gain antenna; The second receiving component includes a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, the second limiter is electrically connected to a second high-power RF switch, and the second bandpass filter is electrically connected to a second low-power RF switch.

4. The signal amplifier according to claim 3, characterized in that: The remote amplification module also includes a third bandpass filter, a fourth bandpass filter and a duplexer, the third bandpass filter is electrically connected to the first low-power RF switch, the fourth bandpass filter is electrically connected to the second low-power RF switch, the duplexer is electrically connected to the third bandpass filter and the fourth bandpass filter respectively, and the duplexer is used to wirelessly connect to an AP access device, wherein the AP access device is a remote control or an external controller.

5. The signal amplifier according to claim 4, characterized in that: The first transmitting component also includes a first RF load, and a first coupler, a first RF power detector and a first gain amplifier connected in sequence, wherein the first coupler is used to be electrically connected to the remote controller, the first gain amplifier is used to be electrically connected to a first low-power RF switch, and the first RF load is electrically connected to a first high-power RF switch; The second transmitting component also includes a second RF load, and a second coupler, a second RF power detector and a second gain amplifier connected in sequence, the second coupler is used to be electrically connected to the remote controller, the second gain amplifier is used to be electrically connected to a second low-power RF switch, and the second RF load is electrically connected to a second high-power RF switch; The first high-power RF switch is used to connect the first RF load when transmitting a signal and to connect the first limiter when receiving a RF signal; the second high-power RF switch is used to connect the second RF load when transmitting a signal and to connect the second limiter when receiving a RF signal.

6. The signal amplifier according to claim 4, characterized in that: The first transmitting assembly further includes a first lightning arrester, one end of the first lightning arrester is electrically connected to the first circulator, and the other end of the first lightning arrester is grounded; The second transmitting assembly also includes a second lightning arrester, one end of the second lightning arrester is electrically connected to the second circulator, and the other end of the second lightning arrester is grounded.

7. The signal amplifier according to claim 6, characterized in that: The first high-power RF switch includes a switch chip, a first metal MOS transistor, a second metal MOS transistor, a first inductor, a second inductor, a third inductor and a fourth inductor. The receiving end of the first switch chip is respectively connected to one end of the first inductor and the third inductor, the other end of the first inductor is grounded, the other end of the third inductor is connected to the drain of the second metal MOS transistor, the gate of the second metal MOS transistor is connected to a preset voltage, and the source is grounded. The transmitting end of the first switch chip is connected to one end of the second inductor, the other end of the second inductor is connected to the drain of the first metal MOS transistor, the gate of the first metal MOS transistor is connected to a preset voltage, and the source is grounded. The antenna end of the first switch chip is connected to a bias voltage through the fourth inductor.

8. The signal amplifier according to claim 2, characterized in that: The remote amplification module further includes a second transmitting component and a second receiving component, wherein the second transmitting component includes a transmitting gating switch, a second pre-driver, a second driver and a second power amplifier connected in sequence, and the second power amplifier is electrically connected to the first limiter; the transmitting gating switch is electrically connected to the first low-power RF switch, and is used to select the first transmitting path or the second transmitting path according to the transmitting signal, wherein the first transmitting path is the first pre-driver, the first driver and the first power amplifier; the second transmitting path is the second pre-driver, the second driver and the second power amplifier; The second receiving component also includes a receiving selection switch, a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, and the receiving selection switch is electrically connected to the second high-power RF switch, wherein the receiving selection switch is used to select the first receiving path or the second receiving path according to the received RF signal, wherein the first receiving path is a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter; the second receiving path is a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter.

9. The signal amplifier according to claim 2, characterized in that: The first transmitting component further includes a transmitting gating switch, a transmitting gain compensator and a second power amplifier, wherein a first end of the transmitting gating switch is electrically connected to the first driver, a second end of the transmitting gating switch is electrically connected to the first power amplifier, a third end of the transmitting gating switch is electrically connected to the transmitting gain compensator, the transmitting gain compensator is electrically connected to the second power amplifier, and the second power amplifier is connected to the first circulator; It also includes a second receiving component, which includes a receiving selection switch, a second limiter, a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter connected in sequence, and the receiving selection switch is electrically connected to the second high-power RF switch, wherein the receiving selection switch is used to select the first receiving path or the second receiving path according to the received RF signal, wherein the first receiving path is a high-pass filter, a first pre-low-noise amplifier, a first pre-bandpass filter, a first low-noise gain amplifier and a first bandpass filter; the second receiving path is a low-pass filter, a second low pre-noise amplifier, a second pre-bandpass filter, a second low-noise gain amplifier and a second bandpass filter.

10. A radio frequency wireless system, characterized in that: The radio frequency wireless system includes a drone, a signal amplifier and an AP access device, the signal amplifier is electrically connected to the drone and the AP access device respectively, and the signal amplifier includes the signal amplifier according to any one of claims 1 to 9.

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