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Laser holographic radio frequency identification (RFID) tag using coplanar inverted F antenna

A technology of RFID tags and laser holography, which is applied in the field of RFID tags, can solve the problems of low efficiency of slit radiation and the difficulty of holographic film to meet the requirements, etc., and achieve the effect of simple manufacturing process

Inactive Publication Date: 2011-04-13
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this scheme, the half-wavelength slot is equivalent to a length of 160mm relative to 915MHz RFID, which requires the holographic film to have a certain size, and a small-sized holographic film will hardly meet the requirements
At the same time, since the thickness of the holographic metal reflective layer is much smaller than the skin depth, the efficiency of the slit radiation formed by it is also very low.

Method used

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  • Laser holographic radio frequency identification (RFID) tag using coplanar inverted F antenna
  • Laser holographic radio frequency identification (RFID) tag using coplanar inverted F antenna
  • Laser holographic radio frequency identification (RFID) tag using coplanar inverted F antenna

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Embodiment Construction

[0029] The present invention will be described below with reference to the description of the drawings and specific embodiments, and the specific embodiments are for illustration only, and are not intended to limit the present invention.

[0030] attached Figure 5 The RFID tag 50 of the embodiment of the present invention includes a coplanar inverted-F antenna 510, a substrate 520 and an RFID chip 530, wherein the coplanar inverted-F antenna 510 is fabricated on the substrate 520, and the RFID chip 530 is mounted on the antenna 510.

[0031] The coplanar inverted-F antenna 510 is composed of a ground plane 511 , a radiator 512 and a short circuit 513 . The ground plane 511 is a whole metal plane, the radiator 512 is an L-shaped metal wire, and one end is connected to the ground plane 511, one end of the short circuit 513 is connected to the ground plane 511, and the other end is connected to the radiator 512, and its shape is according to The impedance adjustment needs to be a...

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Abstract

The invention discloses a laser holographic radio frequency identification (RFID) tag using a coplanar inverted F antenna, comprising an RFID tag (50) and a laser holographic film (10) attached to the tag, wherein the RFID tag (50) comprises the coplanar inverted F antenna (510), a substrate (520) and a RFID chip (530); the coplanar inverted F antenna (510) is manufactured on the substrate (520); and the RFID chip (530) is attached to the coplanar inverted F antenna (510). In the invention, the laser holographic RFID tag can be applicable to ultrahigh frequency and microwave frequency bands, a metallic reflective layer or non-metallic reflective layer can be used as the laser holographic film, the shape and size of the laser holographic film are not restricted, and the method for compounding the laser holographic film with the RFID tag is simple and convenient.

Description

technical field [0001] The invention belongs to the field of RFID tags, in particular to an RFID tag using a coplanar inverted-F antenna. Background technique [0002] In recent years, RFID technology has received widespread attention, and its application has penetrated into various fields, including: intelligent transportation, factory automation, asset and document management, intelligent library, and security fields (such as access control), etc. The usual RFID system is mainly composed of tags, readers and servers. Information is collected through tags and readers, and the server completes data processing. The RFID system has multiple communication frequency bands available, namely low frequency LF (125kHz-134kHz), high frequency HF (13.56MHz), ultra high frequency UHF (860MHz-960MHz) and microwave (2.45GHz, 5.8GHz). Among them, low frequency and high frequency realize data communication through inductive coupling, and the reading and writing distance generally does not...

Claims

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Application Information

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IPC IPC(8): G06K19/077
Inventor 陶波尹周平张亚平陈显才吴光华孙虎
Owner HUAZHONG UNIV OF SCI & TECH
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