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Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID)

A design method and embedded technology, applied in computing, computer parts, radiation element structure, etc., can solve problems such as the complexity of the design process, and achieve the effect of simple design method, good resonance characteristics, and good impedance matching characteristics

Inactive Publication Date: 2013-04-03
GUIZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Ranasinghe et al. proposed a design method of miniaturized RFID electronic tag antenna based on impedance matching, but this method needs to continuously adjust the RC equivalent circuit parameters and antenna geometric dimensions, and the design process is relatively complicated.

Method used

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  • Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID)
  • Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID)
  • Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID)

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Experimental program
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Effect test

Embodiment 1

[0025] 1. Bode-Fano impedance matching constraints of electronic tags

[0026] For the CMOS process RFID electronic tag chip, its equivalent circuit is as Figure 5 Shown. From Figure 5 It can be seen that the input impedance of the chip mainly depends on the junction capacitance X of the diode j And bypass capacitor X s , And can be represented by parallel or series RC equivalent circuit. Therefore, according to the principle of RFID backscattering, for an ideal RFID electronic tag, it can be used Image 6 The equivalent circuit representation including the lossless matching network shown, where R s Is the antenna radiation resistance, R and C are the chip parallel equivalent circuit load respectively. According to the Bode-Fano theorem, for Image 6 In the equivalent circuit of the RFID electronic tag shown, the impedance matching should meet the following constraints:

[0027] ∫ 0 ∞ ln 1 | Γ | dω ≤ π RC - - - ( 1 )

[0028] In f...

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Abstract

The invention discloses a design method of a miniaturization label buckling antenna of a tire embedded radio frequency identification device (RFID). The design method comprises the following steps of determining geometric dimension of bending units and input impedance of a label chip; determining quantity of the bending units in the horizontal direction; determining quantity of the bending units in the vertical direction; adjusting width of a meander line to enable antenna gain to be maximum; and increasing feed ends and adjusting loop inductance to enable the antenna impedance to be in conjugate match with the chip impedance. The design method is simple, effective and convenient to design, has good impedance matching characters, and enables the miniaturization label buckling antenna to be maximum in radiation gain and low in cost. Simultaneously, the design method can be applied to RFID application fields of communication, industrial control, equipment manufacturing, intelligent agriculture, food safety and the like.

Description

Technical field [0001] The invention relates to a design method of an RFID antenna, in particular to a design method of a tire embedded RFID miniaturized tag bent antenna. Background technique [0002] Radio Frequency IDentification is RFID (Radio Frequency IDentification) technology, also known as electronic tags and radio frequency identification. It is a non-contact automatic identification technology that automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work does not require human intervention. Can work in various harsh environments. RFID technology uses the principle of backscattering of electromagnetic waves to realize non-contact, non-line-of-sight recognition of objects, and has low cost and power consumption, so more and more attention and applications are being paid. For example, car tires are embedded with RFID electronic tags to track the number of kilometers the tire travels, the depth of the tire ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36G06K19/077
Inventor 胡圣波司兵李黔蜀鄢富玉舒恒黎玉成宋小伟
Owner GUIZHOU NORMAL UNIVERSITY
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