Phase gradient super-surface based surface plasmon planar antenna

Abstract

The invention discloses a phase gradient super-surface based surface plasmon planar antenna. The planar antenna adopts the phase gradient super-surface as a radiation surface; the received electromagnetic wave is converted into a surface plasmon wave propagating along the surface; the surface plasmon wave propagating along the surface is converted into a radiation electromagnetic wave; a waveguide, microstrip lines, a substrate integrated waveguide, and strip lines are used as a feed structure for exciting and receiving the surface plasmon wave; the radiation surface is manufactured by a one-dimensional or two-dimensional phase gradient super-surface flat plate; the flat plate is manufactured by a microwave base plate; a metal unit structural array with different geometrical parameters is etched periodically in one surface of the microwave base plate, that is plated with metals on two surfaces, for realizing the phase gradient of 360 degrees; and the metal layer on the other surface of the microwave base plate is totally kept. The surface plasmon planar antenna has the advantages of the flat plate shape, the thin layer, the detachable structure, co-plane focusing, high yield and the like.

Description

technical field [0001] The invention relates to the technical field of reflector antennas, in particular to a surface plasmon planar antenna based on a phase gradient metasurface. Background technique [0002] At present, there are two main types of reflector antennas: parabolic reflector antennas and flat panel array reflector antennas. The parabolic antenna has some inherent defects, such as: bulky, difficult to process, difficult to maneuver and so on. The main root of these defects lies in the physical mechanism and working wavelength of the antenna, so it is difficult to overcome them fundamentally, thus constituting the most unfavorable factor in the application of the antenna or radar system. As a military target, this kind of antenna is very vulnerable to attack, and its survivability on the battlefield is extremely poor. At high frequencies, in order to overcome the defects of the parabolic antenna, people have introduced the design idea of ​​the flat reflector ar...

AI Technical Summary

Problems solved by technology

However, most of the existing flat-panel antennas use physical mechanisms such as binary optics and half-wavelength resonance, and the thickness of the flat-panel is unlikely to be much smaller than a quarter-wavelength; in addition, due to the use of reflection mechanisms, the focal point and the reflective surface must be strictly maintained. For the distance of multiple wavelengths, the thickness and focal length of the antenna will be very large, even up to the order of meters, making it difficult to flexibly disassemble, apply and transport

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