1-bit digital coding metamaterial antenna unit

Abstract

The invention discloses a 1-bit digital coding metamaterial antenna unit, which comprises a first substrate and a second substrate, and is characterized in that the upper surface of the first substrate is provided with a metal layer, a grounding layer is arranged between the lower surface of the first substrate and the upper surface of the second substrate, and the lower surface of the second substrate is provided with a bias circuit layer; via holes are correspondingly formed in the grounding layer and the first substrate respectively, the metal layer penetrates through the via holes throughconductive components to be connected with the bias circuit layer, and the metal layer is connected with the grounding layer through a diode; the grounding layer is grounded; and the conductive part comprises a horizontally-arranged non-uniform transmission part and a vertically-arranged conductive rod. According to the invention, the non-uniform transmission part is designed to change the propagation path of electromagnetic waves, thereby achieving the regulation and control of the metamaterial phase. Through structural parameter optimization, the function of broadening the phase-frequency response bandwidth is realized on the premise of ensuring other performances of the antenna.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a 1-bit digital code metamaterial antenna unit, which can be used in communication and radar systems. Background technique [0002] Digitally coded metamaterial antenna units have the advantages of low cost, easy processing, and simple design. They have important application prospects in multifunctional antennas and reduced radar cross-sectional areas. Therefore, they are widely used in communications, radar imaging, and other fields. In addition, the digitally encoded metamaterial antenna unit is a single-channel analog array, which can be equivalent to a multi-channel digital array on the premise of greatly saving costs, and can perform functions such as spatial beamforming and waveform modulation. However, as a special metamaterial antenna unit, it has dispersion characteristics, and the propagation speed and refraction coefficient of electromagnetic waves of different freque...

AI Technical Summary

Problems solved by technology

Commonly used bandwidth widening methods include: electromagnetic coupling, slotting technology, etc. The basic principle is to reduce the quality factor of the equivalent resonant circuit to achieve an average amplitude-frequency response within a certain bandwidth. Using the above method, the bandwidth can be achieved to a certain extent. Broadening, but at the same time lead to a reduction in the reflection efficiency of the metamaterial antenna unit and increase the design difficulty, it is not suitable for digitally encoded metamaterial antenna units

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