Convergence element

Abstract

The invention relates to a convergence element which comprises a functional dielectric slab and an impedance matching element, wherein the impedance matching element is arranged on a first lateral surface of the functional dielectric slab and closely attached to the first lateral surface of the functional dielectric slab; the impedance matching element comprises a plurality of first impedance matching layers, and the refractive index distribution of each impedance matching layer is represented in the specification; the functional dielectric slab is divided into a plurality concentric annular ring bodies, of which the lateral surfaces are curved surfaces and closely attached to each other; the radius of the bottom surface of each annular ring body is less than that of the top surface; and given that the included angle between the connecting line between the radiation source and one point on the bottom surface of the i annular ring body and the straight line perpendicular to the functional dielectric slab is theta, the refractive index of each annular ring body gradually deceases as the included angle theta increases. The refractive index distribution of the impedance matching layers is designed to reduce the reflective jamming and loss; and the jump of refractive index of the functional dielectric layer is designed as a curved surface, thereby greatly reducing the refraction, diffraction and reflection effects at the jump and relieving the problem of mutual interference, so that the convergence element has more excellent properties.

Description

technical field [0001] The present invention relates to the field of electromagnetism, and more particularly, to a converging element. Background technique [0002] With the continuous development of science and technology, electromagnetic wave technology has gradually penetrated into all aspects of our lives. An important characteristic of electromagnetic waves is that they can propagate in any medium or vacuum. During the propagation of electromagnetic waves from the transmitting end to the receiving end, the loss of energy directly affects the distance traveled by the electromagnetic signal and the quality of the transmitted signal. [0003] When the electromagnetic wave passes through the same medium, there is basically no energy loss; and when the electromagnetic wave passes through the interface of different media, partial reflection will occur. Usually, the greater the difference between the electromagnetic parameters (dielectric constant or magnetic permeability) o...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a converging element for the defects of the prior art, such as the above-mentioned reflection interference, large loss, and poor performance

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