Integrated active antenna device for passive detection of unmanned aerial vehicles

Abstract

The invention discloses an integrated active antenna device for passive detection of an unmanned aerial vehicle, which includes a chassis, a center fixture, a plurality of low frequency antenna unitsfor receiving low frequency signals of an unmanned aerial vehicle and a plurality of medium and high frequency antenna unit for receiving medium and high frequency signals of an unmanned aerial vehicle;the low-frequency antenna unit is integrated with low-frequency antenna array elements and low-frequency radio frequency front-end circuits connected with each other, the medium-high frequency antenna unit is integrated with an interconnected medium-frequency antenna array element, an intermediate-frequency radio frequency front end circuit and an interconnected high-frequency antenna array element, a high-frequency radio frequency front end circuit; each low-frequency antenna unit, and the medium-high frequency antenna unit is fixedly installed on the chassis through a central fixture at intervals. The invention has the advantages of simple and compact structure, high integration level and detection precision, large space utilization rate, small volume and weight, convenient installation and the like.

Description

technical field [0001] The invention relates to the technical field of passive detection of drones, in particular to an integrated active antenna device for passive detection of drones. Background technique [0002] At present, drones are used more and more widely, and have become professional equipment and living tools in various industries, which can greatly save working time and improve work efficiency. However, in some key areas, such as airports, prisons, and government departments etc. UAVs will bring security risks to these sensitive areas. Therefore, it is urgent to complete the functions of UAV detection, suppression, and interception through anti-UAV passive detection, so as to realize the security protection of important areas. [0003] The detection antenna is a key component of the anti-drone detection equipment and an important part of the radio direction-finding equipment. The arrangement and performance of the detection antenna determine the overall performa...

AI Technical Summary

Problems solved by technology

At present, anti-drone detection and detection equipment is usually omni-directional and all-round detection. Most of the detection antennas used are passive antennas, and usually ultra-wideband beam antennas or narrow-band directional antennas. Passive antennas need to be integrated with the RF front-end circuit. Discrete design, and then connected by radio frequency coaxial cable, so that the space utilization rate is small, the degree of integration is poor, and it will also cause link loss. At the same time, for the ultra-wideband beam antenna, the antenna beam angle is large and the gain is low, so The detection accuracy of the detection system of the antenna is low, and the overall antenna volume is relatively large, and the narrowband directional antenna must use multiple omnidirectional antenna devices with different frequency bands to detect multiple UAV frequency bands, and each omnidirectional antenna The device is designed in a highly layered manner. This type of antenna device also has problems such as large overall volume, low space utilization and complicated antenna installation.

[0004] Chinese patent application 201711326667.0 discloses an antenna device for anti-drone passive detection and positioning. Antenna element of high frequency, so that a set of antenna device can receive low frequency signal, intermediate frequency signal and high frequency signal at the same time. Coupling between array elements, but in this scheme, each antenna array element and the RF front-end circuit are designed separately, and each antenna array element is connected through a radio frequency coaxial cable, and the entire antenna device adopts a layered structure, and the space utilization rate and integration level Still not high, the overall volume of the antenna device is still large, and there will be link loss

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