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A detection method and system for an equivalent electromagnetic wave orbital angular momentum pulse radar

An orbital angular momentum, pulse radar technology, applied in the field of radar detection, can solve the problem of not being able to generate OAM signals, and achieve the effects of changing polarization characteristics, improving detection sensitivity, and expanding working bands

Active Publication Date: 2020-07-10
TSINGHUA UNIV
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Problems solved by technology

Therefore, none of the current methods can generate the OAM signal of the desired higher order mode

Method used

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  • A detection method and system for an equivalent electromagnetic wave orbital angular momentum pulse radar
  • A detection method and system for an equivalent electromagnetic wave orbital angular momentum pulse radar
  • A detection method and system for an equivalent electromagnetic wave orbital angular momentum pulse radar

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Embodiment Construction

[0032] The system structure, principle and method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments, so as to better explain and understand the technical solution of the present invention. Wherein, the same or similar symbols throughout represent the same or similar elements, or elements with the same or similar functions.

[0033] figure 1 It is a structural schematic diagram of an equivalent electromagnetic wave orbital angular momentum pulse detection radar system based on a rotating antenna, the system includes a signal transmitting subsystem 100, an antenna subsystem 200 and a signal receiving subsystem 300; wherein the signal transmitting subsystem includes a signal generator 101 and transmitter 102, the signal generator is used to generate a chirp signal; the transmitter is to up-convert the baseband pulse signal to a radio frequency signal of a required frequency point, and the signal is sent to the a...

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Abstract

The invention provides a method and a system for equivalent electromagnetic wave orbit angular momentum pulse radar detection, and relates to the technical field of radar detection based on a rotatable antenna. A radar detection system comprises a signal emission subsystem, an antenna subsystem and a signal reception subsystem. The method comprises: M dipole loop-antenna arrays distributed uniformly rotating around a center, emitting pulse signals in a rotation process, performing coherent integration on the pulse signals, to generate an equivalent higher-order mode number orbit angular momentum electromagnetic wave signal on a radar receiving end; the higher-order mode number orbit angular momentum electromagnetic wave; using diversity reception capability to further obtain high signal to noise ratio before detection. The higher-order mode number orbit angular momentum electromagnetic wave can generate obvious phase gradient on a target position, and orbit angular momentum electromagnetic waves in different mode numbers can realize waveform diversity on target detection. The method can make detection capability of radar on weak targets greatly improve. A machine rotation antenna of a M dipole can be replaced by an electric sweeping phased array feed source antenna, and the same effects can be obtained.

Description

technical field [0001] The invention relates to the technical field of radar detection, in particular to a rotating antenna equivalent electromagnetic wave orbital angular momentum pulse detection radar system. Background technique [0002] With the development of stealth technology, the traditional radar detection system is increasingly challenged, and anti-stealth technology has become a persistent research hotspot in radar detection. At present, the stealth target can reduce the radar cross section (RCS) in the direction of the incoming wave to 10 -3 m 2 the following. In order to be able to anti-stealth, radars generally use signal processing methods or improve the level of devices to further improve detection sensitivity, such as: increasing the antenna power aperture product, expanding the radar working band, changing the radar polarization characteristics, etc. However, limited by the signal system and manufacturing process, the degree of improvement is limited. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S7/41G01S7/42
CPCG01S7/40G01S7/411G01S7/42
Inventor 张超陈东
Owner TSINGHUA UNIV
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