Ultra-wide-band large-capacity terahertz metamaterial random radiation antenna

Abstract

The invention discloses an ultra-wide-band large-capacity terahertz metamaterial aperture imaging antenna. The device comprises a terahertz metamaterial random radiation hole net and a terahertz ultra-wide-band variable-coupling feed system, wherein the terahertz metamaterial random radiation hole net is composed of a large quantity of various metamaterial unit modules; the terahertz ultra-wide-band variable-coupling feed system comprises a broadband feed module, a matching module and a terahertz energy transmission module; the broadband feed module receives energy fed from a feed source and transmits the energy to the matching module; the matching module realizes matching between the broadband feed module and the terahertz energy transmission module; and the terahertz energy transmissionmodule makes fed energy uniformly cover the whole terahertz metamaterial random radiation hole net, so that each metamaterial unit module can selectively couple and radiate the energy from the terahertz energy transmission module. The antenna meets the demand for a measurement pattern required for realizing super-resolution large-area non-coherent imaging.

Description

technical field [0001] The invention relates to the field of metamaterial aperture imaging antennas, in particular to an ultra-wideband and large-capacity terahertz metamaterial random radiation antenna. Background technique [0002] The existing metamaterial random radiating antennas are mainly divided into two types, passive metamaterial aperture random radiating antennas and active metamaterial aperture random radiating antennas. Both types of random radiation antennas irradiate the metamaterial surface with electromagnetic waves, and generate random beams by random reflection or random transmission on the metamaterial surface. The passive metamaterial aperture random radiating antenna uses a waveguide or a resonant cavity as a feeding system, and distributes the energy fed by the coaxial line / waveguide evenly in the waveguide or resonant cavity. Randomly arranged on the metamaterial aperture, the metamaterial units with different resonant frequencies selectively transmi...

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Problems solved by technology

[0005] Active metamaterial random radiation antennas are difficult to apply in the terahertz frequency band, because the control of active components is currently difficult to achieve, and the cost of their active components is also very expensive

Passive metamaterial aperture random radiating antennas have low radiation efficiency, the number of detection modes is small due to the limitation of bandwidth, and the correlation between detection modes is high.

The current metamaterial random radiating antenna design is temporarily unable to simultaneously achieve ultra-wideband design, high radiation efficiency design, and large-capacity low-correlation detection mode design.

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