Two-dimensional scanning varactor active metasurface electromagnetic lens antenna

Abstract

The invention discloses a two-dimensional scanning varactor active super-surface electromagnetic lens antenna, which comprises a focusing lens, a two-dimensional scanning array, gaskets, a support column, a horn antenna and a base. The focusing lens is a super-surface electromagnetic lens. The two-dimensional scanning array, the focusing lens and the support column are connected by the gaskets inturn. The two-dimensional scanning array is formed by superimposing two one-dimensional scanning arrays: an x-direction scanning array and a y-direction scanning array, wherein the y direction is usedas the polarization direction, the z direction is used as the axis-of-symmetry direction of the lens, and the bias lines of the varistors in the two one-dimensional scanning arrays are in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltages of the varactors. The scanning array realizes two-dimensional scanning through the one-dimensional scanning arrays realized by two groups of varactor active super-surfaces, the scanning directions of the two arrays are orthogonal, and the two arrays are longitudinally superimposed. By using the method, the complexityand cost of super-surfaces in a large-scale two-dimensional scanning array can be reduced. Meanwhile, the focusing lens is realized by a super-surface, and the longitudinal size is reduced.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave and terahertz communication, and in particular relates to a two-dimensional scanning varactor active metasurface electromagnetic lens antenna. Background technique [0002] Electromagnetic lens is a lens structure that realizes convergence and divergence functions similar to optical lenses in the microwave and millimeter wave frequency bands. [0003] 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. Millimeter wave band and terahertz band frequency bandwidth, high transmission rate, small equipment size, small attenuation, strong penetrating power, etc., suitable for near-field point-to-point communication, satellite communication, etc. The electromagnetic lens antenna applied to the millimeter wave frequency ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art, to provide a two-dimensional scanning varactor active metasurface electromagnetic lens antenna working in the millimeter wave and terahertz bands, which is used to solve the problem of the existing two-dimensional scanning varactor active The number of bias lines in the metasurface 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 larger-scale metasurface lenses.

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