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Non-contact passive radio frequency label and reading system thereof

A passive radio frequency, non-contact technology, applied to record carriers, instruments, and inductive record carriers used in machines, etc., can solve the problems of rapid and accurate identification by readers, poor stability of the carrier frequency of radio frequency signals, and long identification time. To achieve the effect of easy integration

Inactive Publication Date: 2007-10-31
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
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Problems solved by technology

Therefore, the recognition time is long and the scope of application is limited.
When working in a higher frequency band (such as 430-460MHz, 865-928MHz, 2.35-2.45GHz, 5.4-6.8GHz frequency band), since there is no radio frequency oscillator inside, the frequency of the radio frequency signal carrier reflected back to the reader The stability is relatively poor, which brings certain difficulties for the reader to quickly and accurately identify

Method used

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  • Non-contact passive radio frequency label and reading system thereof
  • Non-contact passive radio frequency label and reading system thereof
  • Non-contact passive radio frequency label and reading system thereof

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Embodiment

[0026] Fig. 1 shows a schematic block diagram of two parts of the present invention, a radio frequency tag (RFID) and a corresponding radio frequency tag (RFID) reader system.

[0027] The radio frequency tag (RFID) is composed of a bulk acoustic wave multimode resonator 300 , an antenna matching circuit 302 and a radio frequency antenna 301 . The bulk acoustic wave multimode resonator 103 mainly includes a bulk acoustic wave resonator cavity and a piezoelectric film transducer. The thickness of the bulk acoustic wave resonator determines the interval between two adjacent resonance frequencies of the bulk acoustic wave multimode resonator 103 or the time interval between two adjacent reflection pulses in the time domain; The thickness of the piezoelectric film in the transducer determines the working center frequency of the bulk acoustic wave multimode resonator 103 . In the present invention, the working center frequency of the bulk acoustic wave multimode resonator 103 may ...

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Abstract

This invention relates to one non-contact radio frequency label without source and its read system, wherein the radio frequency label comprises radio frequency wave signal source, antenna match circuit and radio antenna; the radio signal source adopts space multi-mode resonance structure composed of space wave resonance chamber, sound couple layer, bottom electrode, pressure electric film, insulation layer and top electrode; the said read system comprises reader and reader antenna; the reader is in charge for radio label inquire signal emission and radar receive and transmission.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, in particular, the invention relates to a non-contact passive radio frequency tag and a reading system thereof. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) is a non-contact automatic identification technology. Its basic principle is to use the transmission characteristics of radio frequency signals and space coupling (electromagnetic coupling or electromagnetic propagation) to realize automatic identification of identified objects. [0003] Electromagnetic propagation or electromagnetic backscatter coupling is the so-called radar principle model. The emitted electromagnetic waves are reflected after hitting the target, and at the same time carry back the target information, based on the spatial propagation law of electromagnetic waves. The electromagnetic backscatter coupling method is generally suitable for long-dista...

Claims

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Application Information

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IPC IPC(8): G06K19/077G06K7/00
Inventor 乔东海汤亮宫铭举田静
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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