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Low-sidelobe scanning method of low-cost four-dimensional transmission array antenna

A technology of array antenna and scanning method, which is applied in the field of low sidelobe scanning, can solve the problems of unrealizable and low amplitude, and achieve the effect of simplifying the feeding structure

Active Publication Date: 2020-06-12
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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  • Low-sidelobe scanning method of low-cost four-dimensional transmission array antenna
  • Low-sidelobe scanning method of low-cost four-dimensional transmission array antenna
  • Low-sidelobe scanning method of low-cost four-dimensional 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-sidelobe scanning method of a low-cost four-dimensional transmission array antenna. The innovation point of the invention is that a four-dimensional antenna theory is combined with a PIN diode controlled 2-bit reconfigurable transmission array antenna technology, and a transmission array unit with 2-bit phase shift is used to replace a large number of T / R assemblies,so that a complex and heavy feed structure is avoided, and the manufacturing cost is effectively reduced; by introducing a periodic time modulation function to each transmission array unit, the amplitude and phase range of each unit is expanded, so that the low sidelobe scanning characteristic is realized; the low sidelobe scanning directional diagram synthesis, namely the time sequence design process of a time modulation function, is completed in two stages: firstly, according to a convex optimization comprehensive center frequency directional diagram, reducing four phase conduction durationsinto a variable by utilizing a certain constraint condition; and then utilizing the differential evolution algorithm to suppress the sideband level. The method 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 Applications(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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