High-altitude environment unmanned aerial vehicle transceiver

Abstract

The utility model discloses a high-altitude environment unmanned aerial vehicle transceiver, and belongs to the field of unmanned aerial vehicles. The utility model comprises a power supply processing unit, a signal processing and control unit, a radio frequency signal amplification unit, a duplexer unit, an up-conversion unit, a down-conversion unit and a local oscillator unit. The power supply processing unit supplies power to other units, the duplexer unit is connected with an external antenna, the down-conversion unit and the radio frequency signal amplification unit, the down-conversion unit is further connected with the local oscillator unit and the signal processing and control unit, and the signal processing and control unit is further connected with the local oscillator unit and the up-conversion unit. The local oscillator unit is also connected with the up-conversion unit, and the up-conversion unit is also connected with the radio frequency signal amplification unit. The system is simple in structure, strong in anti-interference capability and easy to realize; and the power of the transmitted signal can be adjusted, and the system is suitable for high-altitude environment unmanned aerial vehicles.

Description

Technical Field

[0001] The utility model relates to the field of unmanned aerial vehicles, in particular to a high-altitude environment unmanned aerial vehicle transceiver. Background Art

[0002] With the rapid development of the UAV field, UAV systems have formed a wide range of classification characteristics with a wide range of uses and distinct characteristics, which also makes them very different in size, endurance, flight altitude, flight speed, performance and mission. With the increasing requirements of UAVs for high-altitude environments, it has brought great challenges to the communication of UAV data links. While ensuring their normal working state, they also need to be compatible with other equipment. Among them, transceivers are indispensable modules of UAV systems. For different communication tasks, different products with various frequency bands, various bandwidths, various structures and various interfaces have been formed over the years. In traditional transceivers, due to the problems of flight distance, flight altitude and heat dissipation of UAVs, the signals sent and received by the transceiver will interfere with each other. Therefore, there is an urgent need for an airborne transceiver capable of operating in high-altitude environments. Utility Model Content

[0003] In view of this, the utility model proposes a high-altitude environment UAV transceiver. The utility model can adjust the power of the transmission signal, and has a simple structure, strong anti-interference ability, and is easy to implement.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A high-altitude environment unmanned aerial vehicle transceiver, comprising a power processing unit, a signal processing and control unit, a radio frequency signal amplification unit, a duplexer unit, an up-conversion unit, a down-conversion unit and a local oscillator unit;

[0006] The signal common port of the duplexer unit is connected to the external antenna, the signal output port of the duplexer unit is connected to the signal input port of the down-conversion unit, and the signal input port of the duplexer unit is connected to the signal output port of the radio frequency signal amplification unit;

[0007] The signal output port of the down-conversion unit is connected to the signal input port of the signal processing and control unit;

[0008] The signal output port of the signal processing and control unit is connected to the signal input port of the up-conversion unit, the local oscillator control output port of the signal processing and control unit is connected to the local oscillator control input port of the local oscillator unit, and the power control output port of the signal processing and control unit is connected to the power control input port of the up-conversion unit;

[0009] The signal output port of the up-conversion unit is connected to the signal input port of the radio frequency signal amplification unit;

[0010] The first local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the up-conversion unit, and the second local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the down-conversion unit;

[0011] The power input port of the power processing unit is connected to an external power supply, and the first power output port to the fifth power output port of the power processing unit are respectively connected to the power input ports of the up-conversion unit, the local oscillator unit, the down-conversion unit, the signal processing and control unit, and the RF signal amplification unit.

[0012] Furthermore, the up-conversion unit includes a first intermediate frequency filter, a first intermediate frequency amplifier, an up-converter, a radio frequency filter, a radio frequency amplifier, a gain attenuation controller and a driving amplifier connected in sequence; the local oscillator input port of the up-converter is the local oscillator input port of the up-conversion unit, and the gain attenuation control input port of the gain attenuation controller is the power control input port of the up-conversion unit.

[0013] Furthermore, the down-conversion unit comprises a pre-selection filter, a low noise amplifier, a post-selection filter, a down-converter, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence; the local oscillator input port of the down-converter is the local oscillator input port of the down-conversion unit.

[0014] Furthermore, the local oscillator unit includes a reference source local oscillator circuit, an up-conversion frequency synthesis circuit and a down-conversion frequency synthesis circuit; the first output port of the reference source local oscillator circuit is connected to the input port of the up-conversion frequency synthesis circuit, and the output port of the up-conversion frequency synthesis circuit is the first local oscillator output port of the local oscillator unit; the second output port of the reference source local oscillator circuit is connected to the input port of the down-conversion frequency synthesis circuit, and the output port of the down-conversion frequency synthesis circuit is the second local oscillator output port of the local oscillator unit.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model compared with the prior art are:

[0016] 1. The utility model adopts a design of separating the transmitter and the receiver, thus avoiding the mutual influence of heat conduction between the transmitter and the receiver.

[0017] 2. The design of the duplexer in the utility model ensures a good electromagnetic environment, ensuring that the machine does not receive external interference signals, and does not interfere with the operation of other equipment, and has strong compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a block diagram of a high-altitude environment UAV transceiver in an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Principle block diagram of the mid-up frequency conversion unit.

[0020] Figure 3 for Figure 1 Principle block diagram of the mid- and down-conversion units.

[0021] Figure 4 for Figure 1 Principle block diagram of the local oscillator unit.

[0022] Figure 5 This is an external heat dissipation structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] A high altitude environment UAV transceiver, such as Figure 1 As shown, it includes a power processing unit, a signal processing and control unit, a radio frequency signal amplification unit, a duplexer unit, an up-conversion unit, a down-conversion unit and a local oscillator unit;

[0025] The signal common port of the duplexer unit is connected to the external antenna, the signal output port of the duplexer unit is connected to the signal input port of the down-conversion unit, and the signal input port of the duplexer unit is connected to the signal output port of the radio frequency signal amplification unit;

[0026] The signal output port of the down-conversion unit is connected to the signal input port of the signal processing and control unit;

[0027] The signal output port of the signal processing and control unit is connected to the signal input port of the up-conversion unit, the local oscillator control output port of the signal processing and control unit is connected to the local oscillator control input port of the local oscillator unit, and the power control output port of the signal processing and control unit is connected to the power control input port of the up-conversion unit;

[0028] Specifically, in this embodiment, the signal processing and control unit adopts a C8051F330 microcontroller;

[0029] The signal output port of the up-conversion unit is connected to the signal input port of the radio frequency signal amplification unit;

[0030] The first local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the up-conversion unit, and the second local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the down-conversion unit;

[0031] The power input port of the power processing unit is connected to an external power supply, and the first power output port to the fifth power output port of the power processing unit are respectively connected to the power input ports of the up-conversion unit, the local oscillator unit, the down-conversion unit, the signal processing and control unit, and the RF signal amplification unit.

[0032] Furthermore, if Figure 2 As shown, the up-conversion unit includes a first intermediate frequency filter, a first intermediate frequency amplifier, an up-converter, a radio frequency filter, a radio frequency amplifier, a gain attenuation controller and a driving amplifier connected in sequence; the local oscillator input port of the up-converter is the local oscillator input port of the up-conversion unit, and the gain attenuation control input port of the gain attenuation controller is the power control input port of the up-conversion unit;

[0033] The first intermediate frequency filter filters the intermediate frequency signal transmitted by the signal processing and control unit, the first intermediate frequency amplifier power amplifies the signal transmitted by the first intermediate frequency filter, the up-converter up-converts the signal transmitted by the first intermediate frequency amplifier according to the up-converted local oscillator signal received from the local oscillator unit, the RF filter filters the signal transmitted by the up-converter, the RF amplifier power amplifies the signal transmitted by the RF filter, the gain attenuation controller performs gain control on the signal transmitted by the RF amplifier, the driving amplifier drives and amplifies the signal transmitted by the gain attenuation controller, and then transmits it to the RF signal amplification unit.

[0034] Specifically, in this embodiment, the first intermediate frequency filter adopts the 204343B type SAW filter produced by Taiwan Jiashuo Technology Co., Ltd.; the first intermediate frequency amplifier adopts the HMC476SC70 produced by the American Hittite Company; the up-converter adopts the HMC208A type mixer produced by the American Hittite Company; the radio frequency filter adopts the SC-B1644P30-4PA type filter produced by Nanjing SEG Company; the radio frequency amplifier adopts the UPC2709 type amplifier produced by Japan NEC Corporation; the gain attenuation controller adopts the TQM879028 type gain attenuation controller produced by the American TriQuint Corporation; the drive amplifier adopts the MW6S004N type amplifier produced by the American Freescale Company; the radio frequency signal amplification unit adopts the CGH40025 type amplifier;

[0035] Furthermore, if Figure 3 As shown, the down-conversion unit includes a pre-selection filter, a low noise amplifier, a post-selection filter, a down-converter, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence; the local oscillator input port of the down-converter is connected to the second local oscillator output port of the local oscillator unit;

[0036] The pre-selection filter filters the radio frequency signal sent from the signal output port of the duplexer unit, the low noise amplifier amplifies the level of the signal transmitted by the pre-selection filter, the post-selection filter performs image frequency and other filtering processing on the signal transmitted by the low noise amplifier, the down-converter performs down-conversion processing on the signal transmitted by the post-selection filter according to the received down-converted local oscillator signal transmitted by the local oscillator unit, the second intermediate frequency filter filters the signal transmitted by the down-converter, the second intermediate frequency amplifier power amplifies the signal transmitted by the second intermediate frequency filter, and then transmits it to the signal processing and control unit.

[0037] Specifically, in this embodiment, the preselection filter adopts the SC-B1444P54-4PA filter produced by Nanjing SEG Co., Ltd.; the low noise amplifier adopts the TQP3M9037 amplifier produced by TriQuint Corporation of the United States; the postselection filter adopts the SC-B1444P54-4PA filter produced by Nanjing SEG Co., Ltd.; the down converter adopts the HMC208A mixer produced by HIttite Corporation of the United States; the second intermediate frequency filter adopts the 204563B SAW filter produced by Taiwan Jiashuo Technology Co., Ltd.; the second intermediate frequency amplifier adopts the AD8367 amplifier produced by ADI Corporation of the United States;

[0038] Furthermore, if Figure 4 As shown, the local oscillator unit includes a reference source local oscillator circuit, an up-conversion frequency synthesis circuit and a down-conversion frequency synthesis circuit;

[0039] Specifically, in this embodiment, the reference source local oscillator circuit adopts the HT30DAE3B-10 crystal oscillator produced by Beijing Ruichuang Company; the up-conversion frequency synthesis circuit adopts the SI4133-BT phase-locked loop produced by Silabs Company of the United States; the down-conversion frequency synthesis circuit adopts the SI4133-BT phase-locked loop produced by Silabs Company of the United States;

[0040] The first output port of the reference source local oscillator circuit is connected to the input port of the up-conversion frequency synthesis circuit, and the output port of the up-conversion frequency synthesis circuit is the first local oscillator output port of the local oscillator unit; the second output port of the reference source local oscillator circuit is connected to the input port of the down-conversion frequency synthesis circuit, and the output port of the down-conversion frequency synthesis circuit is the second local oscillator output port of the local oscillator unit;

[0041] The reference source local oscillator circuit generates a reference signal and transmits it to the up-conversion frequency synthesis circuit and the down-conversion frequency synthesis circuit respectively. The up-conversion frequency synthesis circuit combines the local oscillator control signal transmitted by the signal processing and control unit to generate a corresponding up-conversion local oscillator signal and transmits it to the up-converter in the up-conversion unit. The down-conversion frequency synthesis circuit combines the local oscillator control signal transmitted by the signal processing and control unit to generate a corresponding down-conversion local oscillator signal and transmits it to the down-converter in the down-conversion unit.

[0042] The overall principle of the utility model is:

[0043] The down-conversion unit receives the RF signal from the duplexer unit, which is filtered by the pre-selection filter, then amplified by the low noise amplifier, and then filtered by the post-selection filter such as the mirror frequency. The down-conversion is performed through the down-converter, and the intermediate frequency signal output by the down-converter is filtered by the second intermediate frequency filter, amplified by the second intermediate frequency amplifier, and then output to the input port of the signal processing and control unit.

[0044] The up-conversion unit filters the intermediate frequency signal from the signal processing and control unit through the first intermediate frequency filter; amplifies it through the first intermediate frequency amplifier, and then up-converts it through the up-converter; the radio frequency signal output by the up-converter is filtered by the radio frequency filter, then amplified by the radio frequency amplifier circuit, then the gain is controlled by the gain attenuation controller, then amplified by the driving amplifier circuit, and then power amplified by the radio frequency signal amplification unit, and the radio frequency signal that meets the power requirement is output to the duplexer unit and transmitted through the external antenna.

[0045] The reference source local oscillator circuit provides a local oscillator reference signal for the up-conversion frequency synthesis circuit and the down-conversion frequency synthesis circuit. The phase-locked loops in the up-conversion frequency synthesis circuit and the down-conversion frequency synthesis circuit convert the local oscillator reference signal into a corresponding local oscillator signal.

[0046] The signal processing and control unit receives the down-converted intermediate frequency signal, transmits the up-converted intermediate frequency signal, and controls the up-conversion frequency synthesis circuit and the down-conversion frequency synthesis circuit in the local oscillator unit to output the corresponding local oscillator signal, and provides it to the up-conversion circuit and the down-conversion circuit. In addition, the attenuation amount of the gain attenuation controller in the up-conversion unit is controlled to realize the signal size provided to the RF signal amplification unit, thereby realizing the control of the power size of the RF signal transmitted during the up-conversion process.

[0047] Specifically, the present embodiment adopts a frequency division working mode with high transmission efficiency; a wide power supply range: +9V to +36V; large transmission power and long signal transmission distance: 20W output power, and three-speed adjustment of large, medium and small power are designed. The UAV performs power adjustment at different flight distances and altitudes to reduce power consumption; the working frequency is adjustable, and a total of 140MHz transceiver working bandwidth is designed, which can be compatible with multiple devices working simultaneously; a duplexer is designed at the antenna port to ensure a good electromagnetic environment, such as Figure 5 As shown, the heat pipe heat distribution design and matrix distributed heat sink design are adopted to meet the use environment of high altitude and low air pressure. The maximum size of the box (excluding connectors) is 216mm*183mm*75mm, and the weight is less than 2 kg. It can be used as an airborne device in most large UAV systems.

[0048] In short, the utility model has a simple structure, strong anti-interference ability, and is easy to implement; and the power of the transceiver can be adjusted according to the flight altitude and flight distance, and is suitable for UAVs in high-altitude environments.

[0049] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to the embodiments described. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high-altitude UAV transceiver, characterized in that: It includes a power processing unit, a signal processing and control unit, a radio frequency signal amplification unit, a duplexer unit, an up-conversion unit, a down-conversion unit and a local oscillator unit; The signal common port of the duplexer unit is connected to the external antenna, the signal output port of the duplexer unit is connected to the signal input port of the down-conversion unit, and the signal input port of the duplexer unit is connected to the signal output port of the radio frequency signal amplification unit; The signal output port of the down-conversion unit is connected to the signal input port of the signal processing and control unit; The signal output port of the signal processing and control unit is connected to the signal input port of the up-conversion unit, the local oscillator control output port of the signal processing and control unit is connected to the local oscillator control input port of the local oscillator unit, and the power control output port of the signal processing and control unit is connected to the power control input port of the up-conversion unit; The signal output port of the up-conversion unit is connected to the signal input port of the radio frequency signal amplification unit; The first local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the up-conversion unit, and the second local oscillator output port of the local oscillator unit is connected to the local oscillator input port of the down-conversion unit; The power input port of the power processing unit is connected to an external power supply, and the first power output port to the fifth power output port of the power processing unit are respectively connected to the power input ports of the up-conversion unit, the local oscillator unit, the down-conversion unit, the signal processing and control unit, and the RF signal amplification unit.

2. The high altitude environment unmanned aerial vehicle transceiver according to claim 1, characterized in that: The up-conversion unit comprises a first intermediate frequency filter, a first intermediate frequency amplifier, an up-converter, a radio frequency filter, a radio frequency amplifier, a gain attenuation controller and a driving amplifier connected in sequence; the local oscillator input port of the up-converter is the local oscillator input port of the up-conversion unit, and the gain attenuation control input port of the gain attenuation controller is the power control input port of the up-conversion unit.

3. The high-altitude environment UAV transceiver according to claim 1, characterized in that: The down-conversion unit comprises a pre-selection filter, a low noise amplifier, a post-selection filter, a down-converter, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence; the local oscillator input port of the down-converter is the local oscillator input port of the down-conversion unit.

4. The high-altitude environment UAV transceiver according to claim 1, characterized in that: The local oscillator unit includes a reference source local oscillator circuit, an up-conversion frequency synthesis circuit and a down-conversion frequency synthesis circuit; the first output port of the reference source local oscillator circuit is connected to the input port of the up-conversion frequency synthesis circuit, and the output port of the up-conversion frequency synthesis circuit is the first local oscillator output port of the local oscillator unit; the second output port of the reference source local oscillator circuit is connected to the input port of the down-conversion frequency synthesis circuit, and the output port of the down-conversion frequency synthesis circuit is the second local oscillator output port of the local oscillator unit.

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