A Frequency Selective Surface Structure and Its Unit Structure Applied to Ku Band

Abstract

The invention relates to a frequency selection surface structure applied to a Ku waveband and a unit structure thereof. The unit structure comprises a first metal layer, a dielectric substrate and a second metal layer which are arranged in order from top to bottom, wherein the first metal layer is provided with a first star-shaped gap, and the first star-shaped gap comprises a first polygonal gappart positioned at the center and a plurality of first triangular gap parts surrounding the first polygonal gap part; and a second star-shaped gap comprises a second polygonal gap part positioned at the center and a plurality of second triangular gap parts surrounding the second polygonal gap part. The frequency selection surface structure comprises M*N periodically arranged unit structures. The frequency selection surface structure has very high filtering features in the 12GHz frequency band and can prevent the broadcast signals of a satellite from being interfered by other frequency signalsin a downlink.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a frequency selection surface structure and a unit structure applied to the Ku band. Background technique [0002] Frequency Selective Surface (FSS) is a spatial electromagnetic filtering structure, which can pass electromagnetic waves without loss or low loss in a specific frequency band, while filtering out electromagnetic waves outside the frequency band. FSS is essentially a periodic surface composed of specific unit structures in a specific order, which can exhibit total reflection or total transmission characteristics in a specific frequency band, which is equivalent to the role of a spatial filter. FSS can be widely used in filters, resonators, polarizers, antennas, etc. [0003] Broadcasting satellite is a communication satellite that directly rebroadcasts TV signals or broadcasting sound signals to the public. It directly rebroadcasts informat...

AI Technical Summary

Problems solved by technology

The disadvantage of the existing FSS structure for Ku-band is that its structural stability is poor, resulting in poor filtering characteristics, which cannot meet the requirements of higher performance, and the size of the existing FSS structure unit for Ku-band is relatively small. Large, can no longer meet the current demand for miniaturized structures

Images