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A wave-steered array ultra-wideband radar antenna array based on array element feed waveform control

A technology of ultra-wideband radar and radar antenna, which is applied in the direction of independently powered antenna array, antenna array, radio wave reflection/reradiation, etc., which can solve the problems affecting reliability and cost, increasing radar complexity, channel mismatch, etc. problem, to achieve the effect of improving the delay dynamic range, improving stability and reliability, and widening the bandwidth range

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Because the core technology of digital phased array radar is a high-performance all-digital T / R component, although the aperture effect can be completely eliminated and broadband scanning of phased array radar can be realized, there are many channels of phased array radar, and the components, environment, temperature, etc. Factors can cause serious channel mismatch, which has a great impact on processing such as digital beamforming, pulse compression, sidelobe cancellation, etc.
Moreover, its indispensable analog devices such as filters increase the complexity of the radar, seriously affecting its reliability and cost

Method used

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  • A wave-steered array ultra-wideband radar antenna array based on array element feed waveform control
  • A wave-steered array ultra-wideband radar antenna array based on array element feed waveform control
  • A wave-steered array ultra-wideband radar antenna array based on array element feed waveform control

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Embodiment Construction

[0061] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and implementation examples, so as to more clearly understand the features and advantages of the present invention.

[0062] Example: Using the second numerical analysis method, according to the channel reciprocity characteristics and the space-time synchronous focusing principle of time inversion, the transmit signal waveform of the wave-controlled array radar antenna array in the complex multipath environment is designed. like Figure 4 As shown, a plurality of scatterers of different shapes and random arrangements are arranged around the 8*8 radar antenna array. The center frequency of the antenna is 1.12GHz, and the spacing between the antenna elements is 120mm.

[0063] Step 1: Launch a uniform plane wave detection signal s(0, π / 6, t) from the desired target direction (0, π / 6), the waveform is as follows Figure 5 ,formula:

[0064]

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Abstract

The invention discloses a wave-controlled array ultra-wideband radar antenna array based on array element feeding waveform control, belonging to the technical field of ultra-wideband radar. In free space, beam scanning is realized by digital sampling delay; in complex electromagnetic scattering environment, beam scanning or focusing is realized by changing the excitation waveform of each array element. After the excitation waveform of each array element is sampled by A / D to obtain the source waveform, it is generated by D / A after transformation processing in the digital domain. The wave-controlled array radar of the invention does not need a radio frequency phase shifter for beam scanning, but generates a focused beam and realizes focused beam scanning in the time domain or ultra-wide frequency range by controlling the excitation waveform of the array element and its waveform sampling delay. The antenna of the invention belongs to an ultra-wideband radar array, and the working frequency range can cover close to the highest frequency of DC to A / D and D / A data acquisition signals.

Description

technical field [0001] The invention belongs to the technical field of ultra-wideband radar, in particular to a wave-controlled array ultra-wideband radar antenna array based on array element feeding waveform control. [0002] technical background [0003] Radar is not only an indispensable electronic equipment in the military of various countries, but also widely used in social and economic development (such as weather forecasting, resource detection, environmental monitoring, etc.) and scientific research (astronomical research, atmospheric physics, ionospheric structure research, etc.). With the rapid development of science and technology, the military, scientific, economic and other fields continue to put forward new requirements for the function and role of radar, and the bandwidth resources of radar are increasingly tight, and the development and application of broadband radar is urgently needed. [0004] Compared with the traditional radar, the phased array radar contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/02G01S7/28H01Q21/06
CPCG01S7/28G01S13/0209H01Q21/061
Inventor 赵德双许秀娟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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