Circularly-polarized tuning modulator based on tunable metasurface and design method thereof

Abstract

The invention belongs to the technical field of reflection systems, and specifically relates to a circularly-polarized tuning modulator based on a tunable metasurface and a design method thereof. The circularly-polarized tuning modulator is mainly composed of an upper microstrip conduction band layer, a middle dielectric plate and a lower metal grounding plate. The upper microstrip conduction band layer is an electric brush structure and is mainly composed of a circular electric resonance (ELC) structure, a bias circuit and a PIN diode. The circular electric resonance (ELC) structure is composed of an upper semicircular arm, a lower semicircular arm, an arc intermediate opening, central vertical arms and intervals. By controlling the on-off state of the PIN diode, the switching from a turning transition function to a turning maintenance function and the switching from a turning hybridization function to the turning maintenance function are realized for the circularly-polarized tuning modulator. According to the invention, two or more function devices are integrated on one plate, the manufacturing cost is lowered, the efficiency and the reusability are improved, the circularly-polarized tuning modulator is realized without a multi-layer torsion chiral structure, and the circularly-polarized tuning modulator is simple in structure, small in size, low in loss, wide in frequency band and light in weight.

Description

technical field [0001] The invention belongs to the technical field of reflection systems, and in particular relates to a circular polarization handedness regulator based on an adjustable metasurface and a design method thereof. Background technique [0002] The circular polarizer has high reliability and safety because it can receive radio waves with any linear polarization and elliptical polarization, and its transmitted waves can also be received by antennas with any polarization. On the other hand, making circular polarizers into antenna radiators can also suppress rain and fog interference and anti-multipath reflections, and are widely used in satellite navigation and mobile communications. It has important applications in polarization diversity of radar and electronic countermeasures. [0003] Metasurface (Metasurface, MS), as a two-dimensional form of artificial heterogeneous medium, has become a research hotspot in the academic circle in recent years due to its uniq...

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Problems solved by technology

Although in most cases the effect of this change of rotation is small, for some more demanding applications, the effect is large and a rotation correction is required

At the same time, it can also be seen that the functions of PEC and metal good conductors are very single, which is a waste of resources to some extent.

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