Broadband circularly-polarized slot antenna applied to radio frequency identification system

Abstract

The invention discloses a broadband circularly-polarized slot antenna applied to a radio frequency identification system. The broadband circularly-polarized slot antenna comprises a metal substrate, a metal grounding plate, coplanar waveguide transmission wires and an SMA connector, wherein the metal grounding plate covers the metal substrate; the SMA connector is arranged on one side of the metal grounding plate; an I-shaped chamfer is arranged on the left lower corner of the metal grounding plate; a U-shaped micro-strip gap is opened in the middle of the metal grounding plate; the lower part of the U-shaped micro-strip gap is connected with the two coplanar waveguide transmission wires; a metal strip of the metal grounding plate is reserved between the two coplanar waveguide transmission wires; one end of the metal strip is connected with the SMA connector. Compared with the prior art, the broadband circularly-polarized slot antenna applied to the radio frequency identification system disclosed by the invention is simple in structure and easy to process, can realize the planarization of the antenna and is good for the conforming of the antenna and a carrier.

Description

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AI Technical Summary

Benefits of technology

This patented technology improves upon previous designs for achieving wide range linearly polarized (LP) signals over traditional methods like dipoles or quadrupole waves. It allows for better control of signal quality without adding extra components such as phase shifters or amplifiers that can be difficult to manufacture at large scales due to their size constraints. Additionally, it simplifies the design of an LC resonator used within this device while maintaining its performance. Overall, these technical improvements improve communication capabilities and reduce costs associated therewith.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding ways to improve the performance and design flexibility of radiosensitive devices that can be found on various types of vehicles or equipment without being limited due to their location.

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