Design method of compact plane structure parabolic reflector antenna based on meta-material

Abstract

The invention discloses a design method of a compact plane structure parabolic reflector antenna based on meta-material. The design method comprises the following steps that a feed source unit with a plane boundary is designed by using the principle of transformation electromagnetics; a plane structure parabolic reflector is adopted to replace a conventional curved surface structure parabolic reflector to act as the reflecting surface of the reflector antenna; and the plane reflector and the feed source unit are combined to be designed into the compact plane reflector antenna. The plane reflector is adopted to act as the reflecting surface and the reflecting characteristics of the plane reflector are equivalent to those of the conventional parabolic reflector; the designed feed source unit is transparent to rays without blocking to the rays, and the radiation characteristics of a feed source arranged in the feed source unit are equivalent to the radiation characteristics generated by the feed source arranged at the position far from the reflecting surface due to the virtual displacement effect generated by the metal-material; and the reflector and the feed source unit are combined together in the reflector antenna to form a compact structure so that the phenomenon of separation of the reflecting surface and the feed source in the conventional reflector antenna can be avoided.

Description

technical field [0001] The invention belongs to the field of electromagnetic / optical device design. It relates to a theoretical design method of a parabolic reflector antenna with a compact planar structure. The designed reflector antenna is suitable for microwave, millimeter wave, terahertz and other frequency bands. Background technique [0002] As a broadband high-gain antenna, reflector antennas are widely used in satellite communications, radar, remote sensing, and radio astronomy. Its basic structure consists of two parts: reflector and feed. A reflector antenna whose reflective surface is a parabola (parabolic reflector antenna) is the most commonly used form. [0003] The characteristics of the parabolic reflector antenna are mainly determined by its geometrical optical characteristics: the beam emitted at the focus is collimated after being reflected by the reflector, and the reflected beam propagates parallel to the main axis of the reflector; all the path lengt...

AI Technical Summary

Problems solved by technology

Such a structure makes the reflector antenna inconvenient in installation, debugging and use, and because the reflector and the feed are separated from each other in space, the possible shading between them will significantly affect the performance of the antenna

However, from the perspective of traditional reflector antenna design, an effective method has not yet been found to design a reflector antenna with a compact planar structure that can keep the antenna characteristics basically unchanged (compared with conventional parabolic reflector antennas).

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