A Low-Sidelobe Scanning Method for Low-Cost 4D Transmission Array Antenna

An array antenna and scanning method technology, applied in the field of low side lobe scanning, can solve the problems of inability to achieve, low amplitude, etc., and achieve the effect of simplifying the feeding structure

Active Publication Date: 2020-10-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the paper "Space-time-coding digital metasurfaces", Lei Zhang et al. of Southeast University proposed a space-time coded digital metasurface for reflection, which uses low digits (less number of phases) to achieve high digits (more phases) number), but its optimization goal is to make the amplitude of the unit approximately equal at the center frequency, and the amplitude at the sideband frequency is as low as possible. As mentioned earlier, such a design will not be able to achieve ideal amplitude weighting

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  • A Low-Sidelobe Scanning Method for Low-Cost 4D Transmission Array Antenna
  • A Low-Sidelobe Scanning Method for Low-Cost 4D Transmission Array Antenna
  • A Low-Sidelobe Scanning Method for Low-Cost 4D Transmission Array Antenna

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Embodiment

[0061] Consider a rectangular four-dimensional transmission array, the feed source is located on the central axis of the transmission array, the size of the array is M×N=16×16, and each transmission array unit has four phases, namely φ mn = 0°, 90°, 180°, 270°, within a time modulation cycle, select the corresponding turn-on sequence and duration according to the optimized timing. Wherein, the phase selection order is consistent in a 2×2=4 unit sub-array. The reference array is a Chebyshev planar array with 16×16=256 units.

[0062] Other main parameters are:

[0063] d=d x = d y =0.5λ, F / D=0.817, when the beam scans to 15° in azimuth, 30° in azimuth, 45° in azimuth, 45° in elevation, and 45° in D, δ=10^(-30 / 20), When scanning to the azimuth plane of 55 degrees, δ=10^(-28 / 20).

[0064] The low sidelobe pattern is comprehensively scanned using the optimization steps mentioned in the Summary of the Invention. In the first step, the low sidelobe pattern is scanned at the ce...

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Abstract

The invention discloses a low-side lobe scanning method of a low-cost four-dimensional transmission array antenna. The innovation of the present invention is to combine the four-dimensional antenna theory with the 2-bit reconfigurable transmission array antenna technology controlled by PIN diodes, and use the transmission array unit with 2-bit phase shift to replace a large number of T / R components, avoiding complex The bulky feed structure effectively reduces manufacturing costs; by introducing a periodic time modulation function to each transmission array unit, the amplitude and phase range of each unit is expanded, thereby achieving low sidelobe scanning characteristics; low sidelobe scanning pattern synthesis That is, the timing design process of the time modulation function is completed in two stages: firstly, the central frequency pattern is synthesized according to the convex optimization, and the four phase conduction durations are reduced to one variable by using certain constraints; then, the differential evolution algorithm is used to Suppresses the sideband level. The invention can be used in wireless communication and radar systems.

Description

technical field [0001] The invention belongs to the field of antenna technology, and relates to a low-cost four-dimensional transmission array antenna low-side lobe scanning method, specifically combining the four-dimensional antenna theory and the 2-bit reconfigurable transmission array antenna technology controlled by PIN diodes, utilizing the The 2-bit phase-shifted transmission array unit replaces a large number of T / R components, avoiding complex and bulky feeding structures. In addition, by introducing a time modulation function to the transmission phase shift of the transmission array unit, the flexible control and design of the radiation beam of the transmission array antenna is realized. Background technique [0002] With the continuous development of modern wireless communication systems and radar systems, various applications have increasingly stringent requirements for antenna performance and structure. The advantages of low cost, low sidelobe, high gain, and fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/06H01Q21/00H01Q19/06H01Q15/02H01Q13/02H01Q3/44
CPCH01Q3/44H01Q13/02H01Q15/02H01Q19/06H01Q21/0006H01Q21/064
Inventor 杨仕文彭莹陈益凯屈世伟胡俊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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