Ideal invisible antenna housing working at dual frequency bands

Abstract

The invention discloses an ideal invisible antenna housing working at double frequency bands. The radome is mainly formed by periodically arranging sub-wavelength resonance units, and each sub-wavelength resonance unit is mainly composed of a first metal circuit layer, a first dielectric layer, a second metal circuit layer, a second dielectric layer and a third metal circuit layer which are sequentially stacked. The first metal circuit layer and the third metal circuit layer are symmetrically arranged relative to the plane where the second metal circuit layer is located, and each comprises five rectangular metal frames; the first dielectric layer and the second dielectric layer are symmetrically arranged about the plane where the second metal circuit layer is located. The device is thin in thickness, light in weight and simple in structure, the electromagnetic property of the device is equivalent to that of air, and the device has an excellent transmission effect on incident plane waves at all angles. The method can be widely applied to the fields of electromagnetic transparent windows, radomes and the like.

Description

technical field [0001] The invention provides a radome, in particular to an ideal invisible radome which is formed by periodic arrangement of sub-wavelength resonant units and works in dual frequency bands. Background technique [0002] The radome is also called the electromagnetic window. While ensuring the good transmission of specific frequency signals, it also protects the electronic equipment system inside the hood from extreme weather (such as rain, snow, sand, birds, beasts, high temperature, etc.) etc.) effects. Common radome includes vehicle radar radome, nose radar radome, communication base station radome, etc. Because the assembly of radome can prevent the more expensive electronic communication equipment from being directly attacked by various extreme weather, effectively guaranteeing the life and working stability of the equipment, so the radome is widely used in various signal transmission and reception fields such as antennas and radars. [0003] Electronic...

AI Technical Summary

Problems solved by technology

Although these traditional methods can match the impedance of the radome (with good transmission characteristics), they cannot avoid the phase distortion caused by the introduction of the radome itself, that is, when the electromagnetic wave enters the radome from different angles, the phase of the transmitted wave is distorted. The iso-phase planes of the transmitted waves are no longer equal to the iso-phase planes of the incident waves

The root cause of this situation is that the radome, despite being impedance matched, does not have a refractive index of 1

Images