Circuit simulation model for radio frequency identification system

Abstract

The invention discloses a circuit simulation model for a radio frequency identification system, which is used for evaluating the function and the performance of a radio frequency identification tag chip. The circuit simulation model comprises a reader model for simulating the equivalent circuit of an actual reader and generating a 100 percent amplitude shift keying (ASK) modulating signal, a tag card model for simulating the equivalent circuit of an entire tag card which actually comprises a tag chip, a sensing coil model for simulating the equivalent circuits of a printed circuit board (PCB) coil, an oscilloscope and a spectrum analyzer which actually test the depth of a subcarrier load modulation sideband, and a field intensity meter model for simulating the equivalent circuit of an actual field intensity meter. The reader model comprises a 100 percent ASK modulating signal generating circuit, a source impedor, a reader antenna matching network, a reader coil antenna and a reader antenna impedor; the tag card model comprises an on-card antenna inductor, a parasitic resistor, a card parasitic capacitor, a simulated front end circuit and a numerical equivalent load; the sensing coil model comprises two sensing coils, a coil resistor and a spectrum analyzer probe model; and the field intensity meter model comprises a coil inductor and a parasitic capacitor and a parasitic resistor thereof.

Description

technical field [0001] The invention relates to a simulation circuit, in particular to a radio frequency identification system circuit simulation model for quickly and effectively evaluating the function and performance of a radio frequency identification tag chip. Background technique [0002] Radio frequency identification technology is a non-contact automatic identification technology. With its excellent advantages, it is running through the links of production, life, trade and circulation. Especially the development of the service industry today provides a broad development platform for radio frequency identification technology. The radio frequency identification system is composed of tags and readers. The development of low-cost, low power consumption and high-performance tag chips is becoming one of the bottlenecks in promoting the popularization of radio frequency identification technology. [0003] The analog front end (AFE) is the air interface for the radio frequen...

AI Technical Summary

Problems solved by technology

This has resulted in the disadvantages of large investment in tag chip development, high risk, and long design cycle, which has increased the threshold for chip design and is not conducive to the popularization and development of radio frequency identification technology.

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