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Wave control array ultra-wideband radar antenna array based on array element feed waveform control

An ultra-wideband radar and antenna array technology, which is applied in the direction of independently powered antenna array, antenna array, radio wave reflection/reradiation, etc., 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: 2017-11-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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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  • Wave control array ultra-wideband radar antenna array based on array element feed waveform control
  • Wave control array ultra-wideband radar antenna array based on array element feed waveform control
  • Wave control array ultra-wideband radar antenna array based on array element feed waveform control

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Embodiment Construction

[0060] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and examples of implementation, so as to better understand the features and advantages of the present invention.

[0061] Example: use the second numerical analysis method to design the transmit signal waveform of the wave-steering array radar antenna array in a complex multipath environment according to the channel reciprocity characteristics and the space-time synchronous focusing principle of time inversion. Such as Figure 4 As shown in , multiple scatterers with different shapes and random arrangement are set 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.

[0062] Step 1: Send 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:

[0063]

[0064] Step 2: ...

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Abstract

The invention discloses a wave control array ultra-wideband radar antenna array based on array element feed waveform control, and belongs to the field of ultra-wideband radar technology. In free space, beam scanning is achieved through digital sampling delay. In complex electromagnetic scattering environments, beam scanning or focusing is achieved by changing the excitation waveform of each array element. The excitation waveform of each array element is generated first by obtaining a source waveform by A / D sampling and then by D / A after transform processing in a digital domain. The wave control array radar of the invention does not need a radio frequency phase shifter for beam scanning, but generates the focusing beam and achieves the focused beam scanning in the time domain or the ultra-wideband range by controlling the excitation waveform of each array element and the waveform sampling delay thereof. The antenna of the invention belongs to an ultra-wideband radar array, and the coverage of the working frequency range approaches the highest frequencies of DC to A / D and D / A digital sampling 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. technical background [0002] Radar is not only an indispensable electronic equipment for 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 (celestial body research, atmospheric physics, ionospheric structure research, etc.). With the rapid development of science and technology, military, scientific, economic and other fields have continuously put forward new requirements for the functions and functions of radar, and the bandwidth resources of radar are becoming increasingly tight, which urgently requires the development and application of wideband radar. [0003] Compared with traditional radar, phased array radar c...

Claims

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Application Information

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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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