Two-dimensional scanning varactor active metasurface dielectric lens antenna with holes

Abstract

The invention discloses a two-dimensional scanning varactor active metasurface perforated dielectric lens antenna comprising a focusing lens, a two-dimensional scanning array, a spacer, a support column, a horn antenna and a base, wherein the two-dimensional scanning array is a metasurface; the focusing lens is a perforated dielectric lens; the two-dimensional scanning array, the focusing lens, and the support column are successively connected through the spacer; the horn antenna is fixed to the base; the two-dimensional scanning array is formed by two one-dimensional scanning arrays, including an x-direction scanning array and a y-direction scanning array, superposed in the z direction. The y direction is the incident wave polarization direction. The z direction is the lens symmetry axisdirection. The bias line directions of the varactors in the two one-dimensional scanning arrays are both the x direction. The antenna performs two-dimensional scanning by changing the bias voltage ofthe varactors. The scanning array realizes two-dimensional scanning through the two one-dimensional scanning arrays. The scanning directions of the two one-dimensional scanning arrays are orthogonal and superimposed in the longitudinal direction. The method can reduce the metasurface complexity and cost in a large-scale two-dimensional scanning array.

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 metasurface dielectric lens antenna with holes. 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 structu...

AI Technical Summary

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 metasurface dielectric lens antenna with holes 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 capacitive active metasurfaces is the same as the number of cells, so the number of bias lines increases with the square of the lens size, and there are too many bias lines in large-scale metasurface lenses.

Images