Novel vehicle-mounted omnibearing radio interferometer

Abstract

The invention provides a novel vehicle-mounted omni-directional radio interferometer, and the interferometer comprises a pedestal which is used for providing an external mechanical installation interface, a power input interface, and a network communication interface; the power amplifier module is mounted on the side surface of the base, is connected with the signal excitation source and the antenna unit through a radio frequency cable, and is used for filtering and amplifying the power of the radio frequency signal; the antenna unit is mounted on the servo turntable support frame and is used for receiving and transmitting signals; and the servo turntable is mounted in the middle of the base and is used for providing the omni-directional motion capability of the power amplifier module relative to the base. According to the invention, all-directional airspace interference can be realized, the cable penetration distance between the modules is short, the radio frequency power attenuation is small, a wide-band interference signal can be formed to the maximum extent, broadband suppression interference, sweep frequency interference, aiming interference and blocking interference types can be formed in a targeted manner, and the interference efficiency is improved. And the on-site disassembly and maintenance performance is improved while the occupied space of equipment is greatly reduced.

Description

Technical Field

[0001] The invention relates to a novel vehicle-mounted omnidirectional radio jammer, belonging to the field of communication countermeasures. Background Art

[0002] In the current field of communication electronic countermeasures, with the rapid development of drone technology, new challenges have been brought to the management, control and prevention of drones. Radio jammers, as a new and effective means of control, can effectively control illegal drones by emitting jammers signals with the same or similar frequency band as drone communication, forcing drones to return or land. Radio jammers have been well used as a fast and efficient means of drone control.

[0003] However, the radio jammers in the prior art cannot cover the 360° all-round airspace jamming range, and the jamming signal bandwidth is narrow, making the jamming effect against frequency-hopping communication drones poor. In addition, the integrated design has a low degree of integration, and has many external interfaces and cables, making it inconvenient to use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a new type of vehicle-mounted omnidirectional radio jammer, which can realize omnidirectional airspace interference, and the cable insertion distance between modules is short, and the radio frequency power attenuation is small, which can form a maximum wide-band interference signal, greatly reducing the space occupied by the equipment while improving the on-site disassembly and maintenance performance.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a novel vehicle-mounted omnidirectional radio jammer, comprising:

[0007] The base is used to provide external mechanical installation interface, power input interface and network communication interface;

[0008] The power amplifier module is installed on the side of the base and connected to the signal excitation source and the antenna unit through a radio frequency cable, and is used to filter and amplify the radio frequency signal;

[0009] The antenna unit is installed on the top surface of the base and is used to send and receive signals;

[0010] A servo turntable, mounted in the middle of the base, is used to provide the amplifier module with full range of motion capability relative to the base;

[0011] The signal excitation source is mounted on the servo turntable and is used to generate the RF signal.

[0012] The radio frequency signal includes a communication interference signal and a navigation interference signal.

[0013] The antenna unit is a flat panel antenna.

[0014] The servo turntable is also equipped with a protective cover to provide protection for the cable connectors of the power amplifier module and the signal excitation source.

[0015] The power amplifier module has five parallel RF signal processing paths, each of which is provided with a gain module, a driving module and an end module in sequence from the RF input end to the RF output end, and each of which is provided with a power supply and a monitoring unit for monitoring and controlling the operation of the RF signal processing path.

[0016] The power amplifier module also has an independent power supply unit, which has a built-in EMI filter for filtering, and a firmware upgrade control module for controlling the firmware upgrade operation of the radio frequency signal processing path.

[0017] The gain module includes a directional coupler, a gain amplifier, and a digitally controlled attenuator arranged in sequence; the drive module includes an amplitude equalization module and a drive amplifier arranged in sequence; and the final stage module includes a shunt bridge, a power amplifier, a combining bridge, and a dual directional coupler arranged in sequence.

[0018] The modules in the power supply and monitoring unit include enable control, power management, temperature detection, power protection, power-on sequence, communication control and standing wave protection.

[0019] The signal excitation source is equipped with an STM and FPGA dual chip, the STM is used for external communication, and the FPGA is connected to multiple radio frequency data transceivers and a phase-locked loop.

[0020] The phase-locked loop is connected to a 10M crystal oscillator to form a frequency synthesizer, providing an accurate frequency reference.

[0021] The beneficial effects of the present invention are: it can achieve interference in all-round airspace, and the cable insertion distance between modules is short, the radio frequency power attenuation is small, and a maximum wide-band interference signal can be formed. Wideband suppression interference, sweeping frequency interference, aiming interference, and blocking interference types can be formed in a targeted manner, which greatly reduces the space occupied by the equipment while improving the on-site disassembly and maintenance performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the installation structure of at least one embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The principle block diagram of the power amplifier module;

[0024] Figure 3 yes Figure 1 Schematic diagram of the PCB principle of the medium signal excitation source.

[0025] In the figure: 1-base, 2-power amplifier module, 3-antenna unit, 4-protective cover, 5-signal excitation source, 6-servo turntable. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0027] Example 1

[0028] like Figures 1 to 3 A new type of vehicle-mounted omnidirectional radio jammer shown includes:

[0029] Base 1, used to provide external mechanical installation interface, power input interface and network communication interface;

[0030] The power amplifier module 2 is installed on the side of the base 1 and connected to the signal excitation source 5 and the antenna unit 3 through a radio frequency cable, and is used to filter and amplify the radio frequency signal;

[0031] The antenna unit 3 is installed on the top surface of the base 1 and is used for sending and receiving signals;

[0032] The servo turntable 6 is installed in the middle of the base 1 and is used to provide the power amplifier module 2 with omnidirectional movement capability relative to the base 1;

[0033] The signal excitation source 5 is installed on the servo turntable 6 and is used to generate a radio frequency signal.

[0034] Preferably, the radio frequency signal includes a communication interference signal and a navigation interference signal.

[0035] Therefore, the present invention adopts a servo turntable as a structural support, highly integrates a power module, an excitation signal source, a broadband power amplifier module and an antenna unit, and the integrated design has only a power supply and a network port as external interfaces. The network port uses standard Ethernet communication to interact with a host computer, and the control software can use software radio (SDR) technology to realize the selection of interference signal types and parameter settings.

[0036] Example 2

[0037] Consistent with the first embodiment and further optimized in details, the antenna unit 3 is a flat antenna.

[0038] Furthermore, a protective cover 4 is installed on the servo turntable 6 to provide protection for the cable connectors of the power amplifier module 2 and the signal excitation source 5 .

[0039] Furthermore, the signal excitation source 5 is equipped with a dual chip of STM and FPGA, the STM is used for external communication and embedded system control, and the FPGA is connected to multiple RF agile transceivers and a phase-locked loop.

[0040] Furthermore, the phase-locked loop is connected to a 10M frequency crystal oscillator to form a frequency synthesizer to provide an accurate frequency reference.

[0041] Example 3

[0042] Consistent with Example 1, and further optimized in details, there are five parallel RF signal processing paths in the power amplifier module 2, and a gain module, a driving module and an end module are sequentially arranged in each RF signal processing path from the RF input end to the RF output end, and each RF signal processing path has a power supply and a monitoring unit for monitoring and controlling the operation of the RF signal processing path.

[0043] Furthermore, the power amplifier module 2 also has an independent power supply unit, which has a built-in EMI filter for filtering, and a firmware upgrade control module for controlling the firmware upgrade operation of the radio frequency signal processing path.

[0044] Furthermore, the gain module includes a directional coupler, a gain amplifier, and a digitally controlled attenuator arranged in sequence; the drive module includes an amplitude equalization module and a drive amplifier arranged in sequence; and the final stage module includes a shunt bridge, a power amplifier, a combining bridge, and a dual directional coupler arranged in sequence.

[0045] Furthermore, the modules within the power supply and monitoring unit include enable control, power management, temperature detection, power protection, power-on timing, communication control and standing wave protection.

[0046] Example 4

[0047] Basically the same as the above embodiment, including:

[0048] Base (power module): mainly provides external mechanical installation interface, power input interface and network communication interface; a high-power power module is fixedly installed in the internal cavity to complete the power supply required by each module of the radio jammer.

[0049] Broadband power amplifier: The signal excitation source and the transmitting antenna are connected through an RF cable. It mainly filters and amplifies the RF signal output by the excitation source. The power amplifier needs to have a good spurious suppression effect on the non-radiating frequency band, and also has power supply-based health management, working status query, output adjustment and protection functions.

[0050] Antenna unit: The antenna converts the electrical signal output by the power amplifier into electromagnetic waves and radiates them into space. It uses a directional antenna with good gain and directivity. At the same time, the interference antenna also needs to have a wider frequency band to cover the frequency band range of the power amplifier output channel.

[0051] Protective cover: A structural part mainly used to protect the cable connectors between chassis.

[0052] Signal excitation source: The signal excitation source is mainly used to generate interference signals of the required frequency band and modulation mode. According to the characteristics of UAV communication, it is mainly divided into two types: communication interference and navigation interference signals. Communication interference mainly interferes with the remote control and image transmission signals of the UAV, making it unable to accept remote control and send data back to the remote control; navigation interference mainly interferes with the satellite navigation positioning signal of the UAV, making it unable to accurately locate and achieve the purpose of controlled flight. Since the civil frequency of navigation interference is fixed and public, the interference signal is targeted and often has a better interference effect. The signal excitation source is limited by the volume of a single board, the frequency band and bandwidth of the interference signal that can be covered, and the heat dissipation of the RF device. Most of the chassis design is composed of multiple boards. A combiner is often designed in the chassis combination to combine the RF signal to increase the suppression interference bandwidth of the interference signal.

[0053] Servo turntable: Built-in azimuth and pitch motors, controlled by the drive control unit, providing the radio jammer with full range of motion in pitch and horizontal directions, accepting the command control of the host control system, and pointing the antenna unit to the direction where the interference signal is to be radiated. In addition, the servo turntable is integrated with the support base, providing a fixing and installation interface for the signal excitation source, broadband power amplifier and antenna unit, and fixing the wiring between modules.

[0054] Therefore, in the present invention:

[0055] 1. The servo turntable has the ability to move in both azimuth and pitch directions. The azimuth and pitch can be controlled by the host computer software to achieve all-round airspace interference.

[0056] 2. The integrated design of the servo turntable, signal excitation chassis, power amplifier chassis, power module and antenna unit not only reduces the volume and weight, but also shortens the cable insertion between modules and reduces RF power attenuation.

[0057] 3. The signal excitation adopts the design of FPGA+ADRV. The FPGA generates a digital intermediate frequency signal, which is then digitally up-converted through AD. The signal is sent to the combiner through the AD RF dual-channel for RF combining, forming a maximum wide-band interference signal.

[0058] 4. The broadband power amplifier adopts a three-stage amplification technology system of gain, drive, and power amplification, which can achieve a broadband signal output power of 50dBm, while ensuring that the broadband power amplifier has a good standing wave ratio, gain flatness, and harmonic and spurious suppression.

[0059] 5. The antenna unit adopts a flat antenna with high gain and beam width. The corresponding frequency band gain is 10dB and the half beam width is 20°, which ensures the interference power and range.

[0060] 6. The control software uses SDR technology. The interference signal working frequency band, modulation and demodulation type, etc. can all be completed through software configuration. It has a variety of signal modulation methods such as single tone, Gaussian white noise, FM, AM, BPSK, QPSK, etc., which can form broadband suppression interference, sweep frequency interference, aiming interference, and blocking interference types in a targeted manner.

[0061] 7. Integrated integration and modular design complement each other, greatly reducing the space occupied by equipment while improving on-site disassembly and maintenance performance.

Claims

1. A new type of vehicle-mounted omnidirectional radio jammer, characterized in that: include: A base (1) is used to provide an external mechanical installation interface, a power input interface and a network communication interface; A power amplifier module (2) is installed on the side of the base (1) and is connected to the signal excitation source (5) and the antenna unit (3) via a radio frequency cable, and is used to filter and amplify the power of the radio frequency signal; An antenna unit (3) is mounted on the top surface of the base (1) and is used for transmitting and receiving signals; A servo turntable (6) is installed in the middle of the base (1) and is used to provide the power amplifier module (2) with omnidirectional movement capability relative to the base (1); The signal excitation source (5) is mounted on the servo turntable (6) and is used to generate a radio frequency signal.

2. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: The radio frequency signal includes a communication interference signal and a navigation interference signal.

3. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: The antenna unit (3) is a flat-plate antenna.

4. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: A protective cover (4) is also installed on the servo turntable (6) to provide protection for the cable connectors of the power amplifier module (2) and the signal excitation source (5).

5. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: The power amplifier module (2) has five parallel radio frequency signal processing paths, each of which is provided with a gain module, a driving module and an end module in sequence from the radio frequency input end to the radio frequency output end, and each of which is provided with a power supply and a monitoring unit for monitoring and controlling the operation of the radio frequency signal processing path.

6. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 5 is characterized in that: The power amplifier module (2) also has an independent power supply unit, which has a built-in EMI filter for filtering, and a firmware upgrade control module for controlling the firmware upgrade operation of the radio frequency signal processing path.

7. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 5 is characterized in that: The gain module includes a directional coupler, a gain amplifier, and a digitally controlled attenuator arranged in sequence; the drive module includes an amplitude equalization module and a drive amplifier arranged in sequence; and the final stage module includes a shunt bridge, a power amplifier, a combining bridge, and a dual directional coupler arranged in sequence.

8. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 5 is characterized in that: The modules in the power supply and monitoring unit include enable control, power management, temperature detection, power protection, power-on sequence, communication control and standing wave protection.

9. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: The signal excitation source (5) is equipped with an STM and FPGA dual chip, the STM is used for external communication, and the FPGA is connected to multiple radio frequency agile transceivers and a phase-locked loop.

10. The novel vehicle-mounted omnidirectional radio jammer as claimed in claim 1 is characterized in that: The phase-locked loop is connected to a 10M crystal oscillator to form a frequency synthesizer, providing an accurate frequency reference.

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