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Signal interference circuits and equipment

A signal interference and circuit technology, applied in the field of signal interference, can solve the problems of low interference efficiency and narrow bandwidth, and achieve the effect of far interference and high interference efficiency.

Active Publication Date: 2021-08-10
SZ DJI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the bandwidth of UAV remote control signal is usually narrow, although single-tone frequency sweep interference can achieve better results, but the interference efficiency is not high

Method used

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  • Signal interference circuits and equipment
  • Signal interference circuits and equipment
  • Signal interference circuits and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] see figure 1 Embodiment 1 of the present invention provides a signal interference circuit 200 , the signal interference circuit 200 includes a sawtooth wave generation circuit 1 , a noise circuit 2 , a level shift circuit 3 , a VCO module 4 , a power amplifier circuit 5 and an antenna 6 . Wherein, the noise circuit 2 is used to generate narrow-band noise, the output end of the sawtooth wave generation circuit 1 and the output end of the noise circuit 2 are respectively connected to the input end of the level shifting circuit 3, and the level shifting The circuit 3 is used to superimpose the narrowband noise on the sawtooth wave signal, and output the noise superimposed sawtooth wave signal to the VCO module 4, and the VCO module 4 converts the noise superimposed sawtooth wave signal into a frequency sweep signal , and send the frequency sweep signal to the antenna 6 through the power amplifying circuit 5 .

[0021] In the signal interference circuit 200 of this embodim...

Embodiment 2

[0043] Embodiment 2 of the present invention provides a signal interference circuit 200, which is different from the signal interference circuit 200 of Embodiment 1. In the signal interference circuit 200 of Embodiment 2, the sawtooth wave generation circuit 1 in the signal interference circuit of Embodiment 1 is replaced by Triangular wave generating circuit.

[0044] see Figure 4 , the level shifting circuit 3 inputs the triangular wave signal generated by the triangular wave generating circuit and the narrowband noise generated by the noise circuit 2 into the VCO module 4 after superposition and / or level shifting processing, and the VCO module 4 The triangular wave signal superimposed with narrow-band noise is converted into a frequency sweep signal, and the frequency sweep signal is transmitted by the power amplifier circuit 5 and the antenna 6, thereby realizing interference to the remote control signal. In this embodiment, the triangular wave signal is a triangular wav...

Embodiment 3

[0050] see Figure 5 , Embodiment 3 of the present invention provides a signal interference device, the signal interference device includes a housing 100 and a signal interference circuit 200 . Wherein, the signal interference circuit 200 is arranged in the housing 100, the signal interference circuit 200 is protected by the housing 100, the service life of the signal interference equipment is prolonged, and the problem of the exposed signal interference circuit 200 can be solved by the housing. security risks.

[0051] Optionally, the signal interference circuit 200 of the third embodiment is the signal interference circuit 200 of the first embodiment or the signal interference circuit 200 of the second embodiment.

[0052] In the signal interference device of this embodiment, the noise signal and the sawtooth wave signal, or the noise signal and the triangular wave signal are superimposed and then input to the VCO module 4 for modulation, thereby obtaining a frequency sweep...

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PUM

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Abstract

A signal interference circuit and equipment for interfering with remote control signals of drones, wherein the signal interference circuit (200) includes a sawtooth wave generation circuit (1), a noise circuit (2), a level shifting circuit (3), a VCO The module (4), the power amplifier circuit (5) and the antenna (6), the noise circuit is used to generate narrow-band noise; the output end of the sawtooth wave generation circuit and the output end of the noise circuit are respectively connected to the input end of the level shifting circuit, and the level The moving circuit is used to superimpose the narrow-band noise on the sawtooth wave signal, and output the superimposed noise sawtooth wave signal to the VCO module, and the VCO module converts the noise superimposed sawtooth wave signal into a frequency sweep signal, and the frequency sweep signal It is sent to the antenna through the power amplifier circuit. The interference to the UAV remote control signal is achieved by generating a frequency sweep signal whose frequency changes linearly with time and modulated by noise, which has higher interference efficiency and better interference effect.

Description

technical field [0001] The invention relates to the field of signal interference, in particular to a signal interference circuit and equipment. Background technique [0002] With the popularity of drones, civilian drones are becoming more and more popular, which will pose a threat to some security-sensitive areas, so there is an urgent need for air control of civilian drones. The conventional practice is to transmit jamming signals in these security-sensitive areas to interfere with the remote control signals of civilian drones, so that civilian drones cannot work normally in these security-sensitive areas. Small civil drones generally use ISM (Industrial Scientific Medical) frequency band signals such as 2.4GHz (unit: gigahertz) or 5.8GHz for remote control. [0003] Usually, the UAV remote control signal will use frequency hopping communication to enhance the anti-interference ability of the signal. For frequency hopping communication, the interference methods can be mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04K3/00
CPCH04K3/62H04K3/825H04K3/827H04K3/00
Inventor 陈涛邓任钦易铭国
Owner SZ DJI TECH CO LTD