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A RFID reader/writer antenna design

A reader and antenna technology, applied in the direction of antenna, loop antenna, electrical components, etc., can solve the problems of low power consumption, long reading and writing distance of the reader, and low copper consumption of the antenna, so as to achieve low power consumption, read and write Long distance and low copper consumption

Active Publication Date: 2008-09-10
SHENZHEN TATFOOK NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned defects of the prior art, the present invention solves the problems that the coil antenna suitable for portable RFID low-frequency reader has small copper consumption, low power consumption, and long reading and writing distance of the reader.

Method used

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  • A RFID reader/writer antenna design

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Embodiment Construction

[0013] In a preferred embodiment of the present invention, two Ф0.15mm wire diameter copper enameled wires are wound in parallel to form a 45mm×62mm rectangular air-core coil antenna, and the two Ф0.15mm wire diameter copper enameled wires are parallel in structure. Two ends, with the two wires at each end welded together. That is, the two wire ends of 1 and 2 are welded together, and the two wire ends of 3 and 4 are welded together. The inductance of the coil antenna wound by two Ф0.15mm copper enameled wires is 410uH, the internal resistance of the antenna is 5.7Ω, the maximum reading distance of the low-frequency RFID reader is 9.3mm, and the power supply current of the low-frequency RFID reader is 144mA.

[0014] The characteristics of the antenna design of an RFID reader in this embodiment will be described in detail below.

[0015] 1. The copper enameled wire may also be an aluminum-clad copper enameled wire. Coil antennas wound with aluminum-clad copper enameled wires...

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Abstract

The invention relates to a design of a RFID reader-writer antenna, which pertains to the technical field of the design of RFID reader-writer antenna structure. Aiming at solving problems that the existing RFID low-frequency reader-writer has a short reading and writing distance, high power consumption and large copper loss, the design of the RFID reader-writer antenna of the invention comprises a rectangular hollow coil antenna formed by enwinding two Phi 0.15mm diameter copper enamelled wires in parallel and has two terminal ends, and two thrums of each terminal end are welded together, thus reducing the general diameter, the power consumption and copper loss, extending the reading and writing distance of the reader-writer and being most applicable to portable RFID reader-writer antennas with low frequency.

Description

technical field [0001] The invention relates to an antenna design for an RFID reader-writer, and belongs to the technical field of antenna structure design for an RFID reader-writer. Background technique [0002] The existing low-frequency RFID reader antennas all use a copper enameled wire to form a coil antenna. In order to increase the reading and writing distance, a copper enameled wire with a thick wire diameter is often used. In this way, the copper consumption is large and the power consumption is also high. It is not conducive to the promotion of portable RFID low frequency reader. For example, a Ф0.25mm wire diameter copper enameled wire is used to wind a 45mm×62mm rectangular hollow coil antenna, with an inductance of 410uH, an internal resistance of 4.1Ω, and a maximum reading distance of 7.3mm for low-frequency RFID readers. The supply current is 190mA. Contents of the invention [0003] Aiming at the above-mentioned defects of the prior art, the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q7/00
Inventor 孙尚传李锋陈家林严仍友李伟黄祥钧尚淮
Owner SHENZHEN TATFOOK NETWORK TECH
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