Broadband high-precision direction-finding antenna array omni-directional traversal method
A technology of high-precision direction finding and antenna array, which is applied to direction finders, direction finders using radio waves, and measuring devices to achieve the effects of improving work efficiency and work accuracy and speeding up traversal speed
Pending Publication Date: 2020-12-04
ZHEJIANG UNIV +1
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Problems solved by technology
However, the phase-based UAV detection and direction-finding technology is easily affected by complex factors such as spectrum bandwidth, urban multipath effect, and co-channel interference.
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[0018] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art.
[0019] In order to meet the needs of omni-directional detection and direction-finding work, and to reduce the influence range of multipath effects, the present invention creatively proposes and implements a method for omnidirectional traversal of a wide-band high-precision direction-finding antenna array. The 360° omni-directional detection and direction-finding task in the paper provides an omni-directional traversal method. Specifically, the omnidirectional detection and direction finding task is realized by traversing multiple surface arrays. Specific steps are...
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The invention discloses a broadband high-precision direction-finding antenna array omni-directional traversal method. According to the broadband high-precision direction-finding antenna array omni-directional traversal method, area linear arrays of a plurality of antenna arrays are uniformly arranged in the environment, when detection is carried out by a single linear array in the antenna arrays,other area linear arrays need to be turned off by menas of an electronic switch to reduce interference, then a reference signal is generated locally according to the center frequency of a signal frequency band needing to be detected, the phase difference comparison between signals received by the antennas and the local reference signal isconducted, and inquiry is carried out in a sample table established by using a "dark room calibration+field correction" mode in advance to obtain an incoming wave direction in a coverage range; 360-degree omnibearing detection and direction finding are realized by traversing all the area linear arrays in sequence; and the antenna arrays are deployed on a field programmable gate array (FPGA), the traversal speed of the antenna arrays is increased, and simultaneous direction finding and table look-up of multiple frequency bands by a multi-surface linear array can be realized in practical application.
Description
technical field [0001] The invention relates to the field of detection and defense of low-altitude unmanned aerial vehicles, in particular to a method for omnidirectional traversal of a wide-band high-precision direction-finding antenna array. Background technique [0002] In recent years, the rapid popularization of unmanned aerial vehicles, especially civilian unmanned aerial vehicles, has led to frequent incidents of black flying and indiscriminate flying related to unmanned aerial vehicles, which has intensified the demand for low-cost aviation unmanned aerial vehicle surveillance and countermeasure technology . At present, the detection and countermeasures for drones mainly include four methods: radar, radio frequency, video and audio. Among them, the technical means based on the radio frequency antenna is to realize the detection, positioning and countermeasures of the UAV by passively receiving the control and image transmission signals of the UAV in the air and the ...
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Login to View More IPC IPC(8): G01S3/46G01S3/04
CPCG01S3/46G01S3/043
Inventor 史治国陈剑锋单国峰高承醒
Owner ZHEJIANG UNIV