Two-dimensional scanning varactor active ultra-surface thin lens antenna

A two-dimensional scanning and varactor technology, which is applied in the millimeter wave and terahertz communication fields, can solve the problems of many bias lines in the lens and the increase in the number of bias lines, achieve high gain, reduce energy loss, and reduce bias The effect of the number of lines placed

Active Publication Date: 2019-04-05
ZHEJIANG UNIV
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  • Description
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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide an active two-dimensional scanning varactor active ultra-surface thin lens antenna working in the millimeter wave and terahertz bands, which is used to solve the problem of existing two-dimensional scanning varactors. The number of bias lines in the active metasurface is the same as the number of cells, so the number of bias lines increases with the square of the lens size, and the problem of too many bias lines in large-scale metasurface lenses

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  • Two-dimensional scanning varactor active ultra-surface thin lens antenna

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Embodiment 1

[0030] A two-dimensional scanning varactor active metasurface thin lens antenna provided in this embodiment includes a focusing lens 1, a two-dimensional scanning array 2, a spacer 3, a support column 4, a horn antenna 5 and a base 6; the focusing The lens 1 is a thin lens, and the two-dimensional scanning array 2 is a metasurface; the two-dimensional scanning array 2, the focusing lens 1, and the support column 4 are all sequentially connected by a gasket 3, and the support column 4 is fixed on the base 6 , the horn antenna 5 is fixed on the base 6, and the horn mouth of the horn antenna 5 faces the focusing lens 1; the two-dimensional scanning array 2 consists of two one-dimensional scanning arrays: x-direction scanning array 7 and y-direction scanning array 8 are superimposed in the z direction, the y direction is used as the polarization direction of the incident wave, the z direction is used as the lens symmetry axis direction, and the bias line directions of the varactors...

Embodiment 2

[0040] In a preferred embodiment of the present invention, the two-dimensional scanning varactor active metasurface thin lens antenna works in the Ka frequency band.

[0041] refer to figure 1 as shown, figure 1 It is a structural schematic diagram of the focusing lens 1 crescent dielectric lens and hyperbolic dielectric lens in the preferred embodiment of the present invention. Among them, the lower surface of the crescent lens is a spherical surface, and the upper surface is an ellipsoid; the lower surface of the hyperbolic lens is an envelope surface formed by the rotation of the hyperbola along the symmetrical axis of the lens; the parameters of the upper and lower surfaces of the crescent lens and the hyperbolic lens are determined by the lens focal length and the medium medium. The electric constant is uniquely determined. The thin lens changes the phase shift of the transmitted wave through the uneven thickness of the center and the edge, and the phase shift of the tr...

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Abstract

The invention discloses a two-dimensional scanning varactor active ultra-surface thin lens antenna, comprising a focusing lens, a two-dimensional scanning array, a gasket, a supporting column, a hornantenna and a base; the two-dimensional scanning array is an ultra-surface; the focusing lens is a thin lens; the two-dimensional scanning array, the focusing lens and the supporting column are sequentially connected through the gasket, and the horn antenna is fixed on the base; the two-dimensional scanning array is formed by overlapping two one-dimensional scanning arrays of an x-direction scanning array and a y-direction scanning array in the z direction, the y direction is used as an incident wave polarization direction, the z direction is used as a lens symmetry axis direction, and the bias line directions of the two one-dimensional scanning arrays are both in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltage of the varactor, the scanning arrayrealizes two-dimensional scanning through two sets of one-dimensional scanning arrays, the scanning directions of the two sets of one-dimensional scanning arrays are mutually orthogonal and overlapped in the longitudinal direction. The ultra-surface complexity and cost of the large-scale two-dimensional scanning array can be effectively reduced by adoption of the method.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave and terahertz communication, and in particular relates to an active two-dimensional scanning varactor active ultra-surface thin lens antenna. Background technique [0002] Millimeter waves are electromagnetic waves with a frequency range of 30 to 300 GHz and a wavelength of 10 mm to 1 mm. Terahertz is a frequency band with a frequency range of 300 GHz to 3 THz, and its wavelength is 1 mm to 0.1 mm. The millimeter wave band and the terahertz frequency band have the characteristics of wide frequency band, high transmission rate, small equipment size, small attenuation, and strong penetrating power. They are suitable for near-field point-to-point communication and satellite communication. The metasurface is a structure whose vertical thickness is much smaller than the wavelength, and which adopts a planar periodic structure in the horizontal direction. By adjusting the structure of the arran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/06H01Q15/08H01Q15/00H01Q13/02H01Q3/34
CPCH01Q3/34H01Q13/02H01Q15/002H01Q15/0086H01Q15/08H01Q19/062
Inventor 吴锡东戴少鹏周金芳
Owner ZHEJIANG UNIV
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