Common-aperture simultaneous transmitting multi-beam method for phased array radar

A phased array radar and common aperture technology, applied in the field of phased array radar, can solve the problems of reducing the radar angle measurement accuracy, difficult to change, and unable to adaptively form multiple beams, etc.

Inactive Publication Date: 2015-02-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

For the former, the simulation method implemented by hardware, once the multi-beam network scheme is determined, the beam shape and beam pointing etc. are fixed and difficult to change, especially it cannot adaptively form multiple beams, and the anti-interference ability is very poor
For the latter, the radar antenna ar

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  • Common-aperture simultaneous transmitting multi-beam method for phased array radar
  • Common-aperture simultaneous transmitting multi-beam method for phased array radar
  • Common-aperture simultaneous transmitting multi-beam method for phased array radar

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0034] The invention provides a method for simultaneously transmitting multiple beams of a phased array radar. Two orthogonal code waveform signals that are linearly superimposed after phase weighting are transmitted at the transmitting end of the array antenna, and then amplified by a linear power amplifier before being transmitted by the antenna array element. , beams with different orientations can be obtained. The receiving antenna receives the signal reflected by the far-field target, and then the two transmitted signals can be separated through matched filter matching processing.

[0035] Common aperture that the present invention proposes simultaneously transmits multi-beam method (taking 2 beams as example), concrete steps are as follows:

[0036] Step 1. Select two sets of finite-length orthogonal polyphase codes. Assuming that the orthogonal ...

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Abstract

The invention discloses a common-aperture simultaneous transmitting multi-beam method for phased array radar, belongs to the technical field of the phased array radar, and particularly relates to a common-aperture simultaneous transmitting multi-beam forming method for digital array phased array radar. A transmitting terminal of an array antenna transmits two orthogonal code wave signals which are linearly superposed after phase weighting, the signals are amplified through a linear power amplifier and then transmitted out through antenna array elements, and beams with different directions can be obtained. A receiving antenna receives signals reflected by a far field object, matching processing is conducted on the signals through a matching filter, and two transmitting signals can be separated out. Thus, the method has the advantages that during radar detection, a dead zone is small, beam broadening caused by subarray segmentation is avoided, and the method is particularly suitable for multi-object detecting and tracking of short ranges and medium ranges of the phased array radar.

Description

technical field [0001] The invention belongs to the technical field of phased array radar, and in particular relates to a method for forming multiple beams of a digital array phased array radar with a common aperture and simultaneous emission. Background technique [0002] Phased array radar, also known as phased array radar, is an electronically scanned array radar that changes the beam pointing by changing the phase of the transmitted signal. Compared with radars whose antennas scan mechanically, the biggest difference is that the antenna beam can be scanned quickly without turning the antenna. Digital Array Radar (Digital Array Radar) is a fully digital phased array radar in which both receiving and transmitting beams are digitally realized. It can perform amplitude-phase weighting in the digital domain to realize digital beamforming for sending and receiving, and its core technology is an all-digital T / R component. [0003] Another advantage of digital array radar is t...

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Application Information

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IPC IPC(8): G01S7/282
CPCG01S7/35
Inventor 周云于雪莲汪学刚邹林钱璐曾祥东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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