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Spinning object detection method based on vortex electromagnetic wave

A vortex electromagnetic wave and target detection technology, which is used in radio wave measurement systems, radio wave reflection/re-radiation, measurement devices, etc. The effect of improving the dimension of information modulation

Active Publication Date: 2017-05-24
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the rotating target detection method based on vortex electromagnetic wave has no data available in the microwave field.

Method used

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  • Spinning object detection method based on vortex electromagnetic wave
  • Spinning object detection method based on vortex electromagnetic wave
  • Spinning object detection method based on vortex electromagnetic wave

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Embodiment Construction

[0021] The present invention will be described in detail below in combination with specific embodiments.

[0022] In the first step, N antenna elements are arranged at equal intervals on a circle with a radius a to form a transmitting array, and signal excitation is applied to each antenna element to form a vortex electromagnetic wave emission signal, in which the signal excitation is a single frequency , Constant amplitude, incremental phase modulation signal.

[0023] The parameter selection of the number N of antenna array elements and the array radius a of the uniform circular array is set according to the actual detection requirements. Generally, the higher the detection accuracy requirement is, the larger the number N of array elements is, and the larger the array radius a is.

[0024] Taking the center of the transmitting array as the coordinate origin, the antenna array is placed on the XOY plane, and the radar observation space coordinate system XYZ is established, as...

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Abstract

The invention provides a spinning object detection method based on vortex electromagnetic wave. According to the technical solution, the method comprises the following steps: 1, emitting vortex electromagnetic wave by using an antenna array; 2, receiving and processing echo signals to obtain a Doppler frequency offset; and 3, calculating object spinning angular velocity information by using a corresponding relation between the spinning Doppler frequency offset and the orbital angular momentum mode for emitting signals as well as the object spinning angular velocity. The method does not depend on radial motion between the object and a radar as required by traditional Doppler detection, can detect the spinning object under the foresight condition, and can provide a reference for object recognition and development of new system radar technologies.

Description

technical field [0001] The invention relates to the technical field of radar target detection and recognition, in particular to a method for detecting rotating targets based on vortex electromagnetic waves. Background technique [0002] In recent years, urban public safety has received more and more attention, especially with the popularity of small aircraft, urban low-altitude safety is facing more and more challenges. At the same time, facing the military needs under today's information conditions, target recognition plays an important role in military strike and defense tasks, and there is an urgent need for target recognition with many rotating features (such as helicopters, transport aircraft, etc.). [0003] The vortex electromagnetic wave carries orbital angular momentum, and the phase wave front is in a spiral structure. Electromagnetic angular momentum can be divided into two parts: spin angular momentum and orbital angular momentum. Among them, the spin angular m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58
CPCG01S13/583
Inventor 程永强刘康秦玉亮王宏强袁铁柱刘红彦
Owner NAT UNIV OF DEFENSE TECH