Cavity-backed slot antenna based on substrate integrated waveguide

Abstract

In order to obtain a better omnidirectional antenna, the invention discloses a cavity-backed slot antenna based on a substrate integrated waveguide, which comprises a dielectric plate, a conductive plate and a feed probe, the conductive plate is cylindrical, the dielectric plate is cylindrical, and one bottom surface of the conductive plate is connected with one bottom surface of the dielectric plate. The area of the section of the conductive plate is equal to that of the section of the dielectric plate, and the circle center of the conductive plate is coaxial with that of the dielectric plate; a circular hole is formed in the conductive plate, and the circle center of the circular hole is coaxial with the circle center of the dielectric plate; a plurality of short-circuit via holes are formed in the edge of the circular hole in a surrounding manner; and the feed probe is longitudinally arranged on the circle center of the dielectric plate. A dielectric integrated waveguide technologyis adopted, the problem that a traditional microstrip patch antenna is easily affected by surface waves is solved, the microstrip patch antenna has the advantages of being easy to integrate and easy to machine, a first-order cavity mode is generated through the structure of the back cavity, and therefore the broadband characteristic is achieved, and the structure is simple and easy to achieve.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a cavity-backed slot antenna based on a substrate integrated waveguide. Background technique [0002] The omnidirectional antenna is a kind of antenna commonly used in wireless communication. It can achieve omnidirectional radiation in azimuth, allowing multiple users to use it at the same time. Existing omnidirectional antennas include monopole antennas and microstrip patch antennas. A monopole antenna is easy to fabricate, but it is thicker and has a smaller bandwidth. The microstrip patch antenna is easy to fabricate, and can achieve large bandwidth by loop coupling, loading short-circuit nails and double-layer dielectric boards. However, the performance of the microstrip patch antenna is easily affected by surface waves and the external environment. Due to the cavity-back structure, the cavity-backed antenna is less affected by surface waves. However, most of the existing cavity-...

AI Technical Summary

Problems solved by technology

The invention adopts the dielectric integrated waveguide technology, solves the problem that the traditional microstrip patch antenna is easily affected by surface waves, has the characteristics of easy integration and easy processing, and generates a first-order cavity mode through the structure of the back cavity, thereby realizing broadband Features, simple structure and easy implementation

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