High-aperture efficiency reflect array antenna

A reflectarray antenna and aperture technology, which is applied to antennas, electrical components, etc., can solve the problems of high processing cost, limiting the fineness of phase compensation of planar reflectarray antennas, and complicated steps for planar reflectarray antennas.

Inactive Publication Date: 2016-07-13
AIR FORCE UNIV PLA
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Problems solved by technology

[0005] At present, the method of using multi-layer units to reduce the reflection phase sensitivity increases the thickness of the device and increases the processing complexity; the design of planar reflectarray antennas by combining multiple units is complicated and the processing cost is high; at the same time, the current report The unit size of the reflectarray is kept at 0.3-0.5λ0, which greatly limits the fineness of the phase compensation of the planar reflectarray antenna

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Embodiment Construction

[0024] The essence of wavefront engineering is the independent control of the phase and amplitude of electromagnetic waves. According to Fermat's principle, a metasurface with a parabolic surface phase can convert a point source spherical wave into a highly directional plane wave. In spherical coordinates, given the focal point Then the phase distribution that needs to be satisfied on the reflective metasurface is:

[0025]

[0026] Among them, r 0 is the distance from the metasurface phase center to the focal point, λ is the free-space wavelength of the metasurface working, θ and Respectively represent the pitch angle and the horizontal angle, both of which determine the focus azimuth at the same time. According to Fermat's principle, the reflector surface (x s ,y s ) radiation characteristics at can be calculated as:

[0027]

[0028] in, is a certain spatial position in the far field, E(x s ,y s ) is the tangential field on the surface of the reflective a...

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Abstract

The invention discloses a high-aperture efficiency reflect array antenna, which comprises a metal bottom plate. The metal bottom plate is provided with a 14*14 phase compensation unit array; each phase compensation unit comprises a printed circuit board; and the printed circuit board is provided with an isotropic three-ring square resonator. By adopting the technical scheme of the invention, only a single-layer double-resonance low-Q value structure is adopted to realize a 360-DEG phase coverage range, the reflect phase change rate is small, research on the high-efficiency reflection array antenna can be realized by only adopting a unit, the processing is easy, the cost is low, and the phase compensation fineness is improved.

Description

technical field [0001] The invention belongs to the technical field of antenna design, in particular to a reflect array antenna with high aperture efficiency. Background technique [0002] In recent years, with the rapid development of wireless communication systems, wavefront engineering and radar systems, the role of compact high-gain antennas in aerospace engineering, target detection and other fields has become more and more prominent. Especially for the planar reflectarray antenna, it has the excellent performance of the reflector antenna and the array antenna, and also has the advantages of planar structure, which makes the planar reflectarray antenna favored by the majority of antenna designers. [0003] Existing planar reflectarray antennas have been widely used in the terahertz frequency band and microwave band. At the same time, due to their efficient beam steering characteristics, they have also been used to develop reflectarray antennas with different functions, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/14
CPCH01Q15/14
Inventor 王光明蔡通许河秀梁建刚张小宽高向军刘丹李唐景庄亚强
Owner AIR FORCE UNIV PLA
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