Filter dielectric resonator antenna with double-radiation zero value

Abstract

The invention proposes a filter dielectric resonator antenna with a double-radiation zero value. The problems of surface wave loss and ohmic loss of an existing filter patch antenna are mainly solved.The filter dielectric resonator antenna comprises a dielectric substrate (3), a metal floor (4), a micro-strip feeder (5) and a short-circuit via hole (6). The metal floor and the micro-strip feederare printed on the upper surface and the lower surface of the dielectric substrate, and a feed structure is formed by connection through a short-circuit via hole: a second dielectric plate (2) and a first dielectric block (1) are fixed in sequence to the upper part of the metal floor, the first dielectric block acts as a radiator, and the second dielectric plate achieves good matching between theradiator and the feed structure; and two stepped slits (7) and (8) of the same size are engraved on the surface of the metal floor and used for slot coupling feeding to avoid the influence of parasitic radiation. The filter dielectric resonator antenna has good out-of-band rejection capability while maintaining high gain, the surface wave loss is avoided, the antenna radiation efficiency is improved, and the wireless signal can be received and transmitted in a C-band.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a filter dielectric resonator antenna, which can be used for receiving and transmitting wireless signals in the C-band. Background technique [0002] With the rapid development of wireless communication, traditional single-function antennas can no longer meet the increasingly complex and diverse requirements of wireless communication systems. In order to adapt to the development of modern communication equipment, filter antennas have gradually gained people's attention. Since the concept of filter antenna was proposed, scholars at home and abroad have conducted extensive research on filter antenna. In the traditional filter antenna design, the antenna unit and the filter unit are designed separately, and then the two are cascaded, but this method is difficult to achieve a good match between the two. In order to solve this problem, it is necessary to add an addition...

AI Technical Summary

Problems solved by technology

Chinese patent authorization number CN109066072A discloses a broadband filter antenna. Although the invention has a 42% impedance bandwidth, its structure contains five layers of patches and four layers of dielectric materials, and the structure is relatively complicated.

[0007] The existing dielectric resonator antenna uses a dielectric material as the radiator of the antenna, which has the advantages of light weight, wide frequency band, high radiation efficiency and easy excitation, etc., but its profile is high, and the mode analysis is difficult. If some parasitic structures or resonance The structure will cause the dielectric resonator antenna matching to deteriorate, so it is difficult to achieve the filtering characteristics

Images