One point coaxial feed low profile back-cavity circularly polarized antenna

Abstract

The invention relates to a single-point coaxial feeding low-profile cavity-backed circularly polarized antenna. Ordinary cavity-backed circularly polarized antennas have complex structures, large volumes, and high manufacturing costs. In the invention, metal layers are plated on both sides of the dielectric substrate, and the upper metal layer is etched with two mutually perpendicular rectangular slits for radiating energy. Through the upper metal layer, the dielectric substrate and the lower metal layer, a plurality of metallized through holes arranged in a circle are opened to form a circular cavity. At the appropriate position of the angle bisector of two mutually perpendicular elongated radiation slots in the cavity area, a coaxial probe is connected through the lower metal layer and the dielectric substrate as a feed structure. Compared with the existing cavity-backed circularly polarized antenna composed of a metal cavity, the cavity of the present invention is manufactured by common PCB technology, so that the antenna has a small profile and low manufacturing cost.

Description

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AI Technical Summary

Benefits of technology

The inventors have developed an improved version of a small square loop (SRL) dipole used for communication purposes called Cassegrain Antenna or Microwave Antennance Factor (MFA). These SRL elements use special materials like ceramics instead of conventional metals such as gold. They also reduce their size compared to other types of antennas due to its compact shape. By utilizing these techniques, they make it easier to create smaller components while maintaining good radio frequency characteristics over longer periods of operation.

Problems solved by technology

Technological Problem: Current designs of circularly oriented dipole antennas require multiple layers or spiraling processes that result in increased thicknesses while maintaining desired properties like resonance match between different parts (transmitting/receiving). Additionally, current circularly conductive materials often exhibit poor stability over long periods of operation without being able to integrate themselves within electronic devices.

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