An ultra-thin low-pass frequency-selective metamaterial wave-transparent radome

Abstract

The invention discloses an ultra-thin low-pass and frequency-selective metamaterial wave-transparent radome and an antenna system thereof. The ultra-thin low-pass and frequency-selective metamaterial wave-transparent radome includes at least one metamaterial sheet layer which includes a first substrate and a plurality of artificial microstructures which are in array arrangement on the first substrate; each artificial microstructure includes a first H-shaped structure layer, a second H-shaped structure layer and a cross-shaped structure layer, and the first H-shaped structure layer and the second H-shaped structure layer have the same structure, and the cross-shaped structure layer is arranged between the first H-shaped structure layer and the second H-shaped structure layer; the first H-shaped structure layer and the second H-shaped structure layer have middle parts which are of wire duct structures, and the connecting parts in the middle parts are square chip capacitors, and the chip capacitor is connected with and conducted to a metal part. According to the invention, the radome has excellent wave-transparent properties through special structure configuration, and the antenna has a small thickness which greatly reduces the weight of the radome for low frequency antenna and increases competitiveness under relevant applications. The radome can also realize frequency selection, increases invisibility property of the radome and an antenna device system.

Description

Technical field [0001] The invention relates to a radome, more specifically, to an ultra-thin low-pass frequency selective metamaterial wave-transmitting radome. Background technique [0002] Metamaterials, commonly known as metamaterials, are a new type of artificial synthetic material, which is composed of a substrate made of non-metallic materials and multiple artificial microstructures attached to the surface of the substrate or embedded in the substrate. The substrate can be virtually divided into a plurality of substrate units arranged in a rectangular array, and each substrate unit is attached with artificial microstructures to form a metamaterial unit. The entire metamaterial is composed of many such metamaterial units, like Crystals are composed of countless lattices in a certain arrangement. The artificial microstructures on each metamaterial unit may be the same or not exactly the same. Artificial microstructures are plane or three-dimensional structures with certain...

AI Technical Summary

Problems solved by technology

[0005] Antennas used in low frequency bands, in order to protect the performance of the antenna from harsh environments such as rain, snow, and strong wind, often need to protect the antenna with a radome. Since the antenna works in a lower frequency band, in order to ensure its wave transmission performance The thickness of the radome is designed to be 1 / 2 of the wavelength of the working frequency band of the antenna. For example, at 2.4GHz, the working wavelength of the antenna is about 150mm, and the thickness of the radome is about 75mm. The large thickness makes the radome heavy, resulting in the cost of the radome Disadvantages such as high, heavy and inconvenient for transportation

In some specific use environments, it is required that the radome not only has better wave-transmitting performance, but also has a lighter weight. The traditional radome is no longer suitable for such an environment.

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