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A wideband high gain circularly polarized RFID antenna

A high-gain, circularly polarized technology, applied in the field of communications, can solve the problems of narrow axial ratio bandwidth, low gain, and narrow antenna impedance bandwidth, and achieve the effect of simple antenna structure, low stripping surface, and small diameter.

Pending Publication Date: 2018-12-28
GUANGDONG BROADRADIO COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a broadband high-gain circularly polarized RFID antenna aiming at the problems of the background technology, so as to solve the defects of the existing antennas such as narrow impedance bandwidth, narrow axial ratio bandwidth, and low gain.

Method used

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  • A wideband high gain circularly polarized RFID antenna
  • A wideband high gain circularly polarized RFID antenna
  • A wideband high gain circularly polarized RFID antenna

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

A wideband high gain circularly polarized RFID antenna is provided. The invention relates to the technical field of communication, and the antenna comprises a metal radiation plate, a vibrator plate combination structure, a metal reflection plate and a feeding network, wherein the vibrator plate combination structure comprises a first vibrator plate partially copper-coated on one side and a secondvibrator plate partially copper-coated on one side, wherein the first vibrator plate and the second vibrator plate are vertically nested; The antenna is a universal circularly polarized RFID antennawith high gain, small axis ratio and low standing wave, which can cover the global UHF RFID operating frequency band (840-960MHz). The antenna height is only 0.1 lambda, and the metal radiator size isonly 0.35 lambda. The antenna has the characteristics of low stripping and small aperture, and is easy to be integrated into the system. A feed network is composed of coaxial cables, and the antennais simple in structure and easy to assemble, and has cost advantages.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a broadband high-gain circularly polarized RFID antenna. Background technique [0002] RFID technology is a non-contact automatic identification technology, which automatically identifies target objects and obtains relevant data through radio frequency signals. Compared with traditional automatic identification systems (such as barcodes), RFID technology has the following advantages: 1. It can read or write data at a long distance, directional or non-directional, without keeping the identified target visible; 2. It can penetrate external materials Read data; 3. Work in harsh environments; 4. Process multiple electronic tags at the same time; 4. The amount of information that can be stored is large; 5. Physical positioning of objects can be performed through RFID tags. The RFID antenna is a key component of the radio frequency identification system, and the electromagnetic ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/50H01Q23/00
CPCH01Q1/36H01Q1/50H01Q23/00
Inventor 邱柯芳吴壁群赖言罕张鹏吴泽海苏振华
Owner GUANGDONG BROADRADIO COMM TECH
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