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1. (WO2018184197) SIGNAL JAMMING CIRCUIT AND DEVICE

Pub. No.:    WO/2018/184197    International Application No.:    PCT/CN2017/079688
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Sat Apr 08 01:59:59 CEST 2017
IPC: H04B 15/00
Applicants: SZ DJI TECHNOLOGY CO., LTD.
深圳市大疆创新科技有限公司
Inventors: CHEN, Tao
陈涛
TANG, Yijun
汤一君
DENG, Renqin
邓任钦
Title: SIGNAL JAMMING CIRCUIT AND DEVICE
Abstract:
A signal jamming circuit (200) and a device for use in jamming a navigation signal of an unmanned aerial vehicle, the navigation signal being GPS, GLONASS or BD multimode. The signal jamming circuit (200) comprises: a control module (1), a frequency synthesizer module (2), a power amplifier circuit (4), and an antenna (5). The frequency synthesizer module (2) is used for generating a jamming signal. The control module (1) is connected to the frequency synthesizer module (2). The control module (1) is used for controlling the frequency of the jamming signal to switch between the navigational frequencies of at least two modes of GPS, GLONASS, and BD multimode. The jamming signal is transmitted to the antenna (5) via the power amplifier circuit (4). The signal jamming circuit (200) is capable of outputting jamming signals of different frequency bands at different time periods, thus implementing the jamming of navigation signals of at least two modes of GPS, GLONASS, and BD multimode, preventing an unmanned aerial vehicle from positioning precisely, and providing increased jamming efficiency.