Search International and National Patent Collections

1. (WO2018184186) SIGNAL INTERFERENCE CIRCUIT AND DEVICE

Pub. No.:    WO/2018/184186    International Application No.:    PCT/CN2017/079662
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Sat Apr 08 01:59:59 CEST 2017
IPC: H04K 3/00
Applicants: SZ DJI TECHNOLOGY CO., LTD.
深圳市大疆创新科技有限公司
Inventors: CHEN, Tao
陈涛
DENG, Renqin
邓任钦
YI, Mingguo
易铭国
Title: SIGNAL INTERFERENCE CIRCUIT AND DEVICE
Abstract:
Provided are a signal interference circuit and device, used for interfering with the remote control signal of an unmanned aerial vehicle; a signal interference circuit (200) comprises a sawtooth-wave generator circuit (1), a noise circuit (2), a level-shifting circuit (3), a VCO module (4), a power amplifier circuit (5), and an antenna (6); the noise circuit is used for generating a narrowband noise; the output terminal of the sawtooth-wave generator circuit and the output terminal of the noise circuit are each connected to the input terminal of the level-shifting circuit; the level-shifting circuit is used for overlaying the narrowband noise onto the sawtooth wave signal and outputting the sawtooth wave signal having the noise overlaid thereon to the VCO module; the VCO module converts into a frequency-sweeping signal the sawtooth wave signal having the noise overlaid thereon, and passes the frequency-sweeping signal through the power amplifier circuit and sends the signal to the antenna. Interference is caused to the remote-control signal of an unmanned aerial vehicle by means of generating a frequency-sweeping signal of which the noise is modulated according to linear changes of time; interference effectiveness is higher and interference performance is improved.