Conical-surface broadband wave-transparent antenna housing embedded with fiber bragg grating

Abstract

The invention provides a conical-surface broadband frequency-selective wave-transparent antenna housing embedded with a fiber bragg grating. The antenna housing is used for solving the problem that the electrical performance of the existing antenna housing system is easily influenced and deteriorated by the environment. The antenna housing comprises a conical surface upper layer skin (1) and a conical surface lower layer skin (2) formed by compounding a plurality of layers of epoxy glass cloth, an aramid paper honeycomb sandwich (3) is arranged between the two layers of conical surface skins, a dielectric substrate (4) is arranged between the epoxy glass cloth of the lower layer skin (2), a metal pattern formed by arranging a plurality of same metal patch units (5) is etched on the dielectric substrate (4), each metal patch unit adopts a single-resonance broadband structure, and a fiber grating sensor (6) is embedded between the epoxy glass cloth of the upper skin or the lower skin, so that the antenna housing can sense deformation displacement and transmit deformation displacement information to a deformation compensation system for correction, normal work of the antenna can be ensured in a severe environment, electrical performance deterioration is prevented, The antenna housing can be used for scenes with broadband wave transmission and deformation monitoring capabilities.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to a tapered broadband wave-transmitting radome, which can be used in scenes with broadband wave-transmitting and deformation monitoring capabilities. Background technique [0002] A frequency selective surface (FSS) is a two-dimensional periodic structure composed of periodic arrangements of resonant units. According to the structure of the unit, the frequency selective surface can be divided into a patch type and an aperture type. The patch type frequency selective surface mostly shows a band-stop characteristic, and the aperture type frequency selective surface mostly shows a bandpass characteristic. These characteristics make frequency selective surfaces widely used in civilian fields such as spatial filters and antenna reflectors. [0003] A radome is a structure that protects an antenna system from the external environment. It has go...

AI Technical Summary

Problems solved by technology

However, due to the large number of layers and high profile, the frequency selective structure cannot be bent and deformed, so it cannot meet the conformal requirements of the cone surface. Therefore, a frequency selective surface structure suitable for the conformal shape of the cone radome is needed, and has a broadband transparent structure. Wave performance, the dielectric substrate of this structure needs to have an extremely low profile to meet the conformal requirements, and the metal patch unit on the frequency selective surface needs to have broadband wave transmission performance

[0004] When the radome is affected by the harsh environment, it will undergo overall or local deformation, which will affect the mechanical performance and electromagnetic performance. For example, excessive deformation will lead to plastic deformation. For some antennas that are greatly affected by the deformation of the radome, For example, the Cassegrain antenna, the deformation of the radome will lead to the change of the position of the sub-reflector, which will lead to the change of the electromagnetic performance.

Images