Field programmable surface acoustic wave radio frequency electronic tag

Abstract

The invention relates to a field programmable surface acoustic wave radio frequency electronic tag. The electronic tag comprises a piezoelectric substrate, a transmitting interdigital transducer and a group of distributed reflecting grating arrays, wherein both ends of each reflecting grating of the surface acoustic wave electronic tag are provided with contacts; the distributed reflecting gratings are not connected one another; the surface acoustic wave electronic tag also comprises an integrated circuit chip which is laminated with the electronic tag and has switching function; external contacts of the integrated circuit chip are arranged in one-to-one correspondence with the contacts of the reflecting grating array of the surface acoustic wave electronic tag; and open-circuit connection and short-circuit connection of any two contacts of the distributed reflecting grating array are controlled through a field programming control switch circuit. Combined with a conventional integrated circuit design, a switch array realized by utilizing a conventional integrated circuit changes the open circuit and the short circuit of each reflecting grating of the reflecting grating array, realizes the field programming of the surface acoustic wave radio frequency electronic tag, enhances the multi-functionality and the flexibility of the design and reduces the cost of the SAW ID-tag.

Description

technical field [0001] The invention belongs to the field of surface acoustic wave technology, in particular to a field-programmable surface acoustic wave radio frequency electronic tag, which is a radio frequency electronic tag (RF-ID tag) realized jointly by surface acoustic wave (SAW) and integrated circuits. Background technique [0002] Electronic tags using surface acoustic wave (SAW) technology began in the late 1980s, and research on SAW tags has become a hot spot in recent years. [0003] Such as figure 1 As shown, a typical SAW RFID tag system includes a reader (Reader) and a radio frequency tag. The reader transmits a radio frequency query pulse through the antenna, and receives the signal returned by the tag, and obtains the tag information within the reading range after processing. The SAW tag is a one-port device that includes a tag antenna, an interdigital transducer (IDT) and a series of coded reflective grids. The IDT is directly connected with the antenna...

AI Technical Summary

Problems solved by technology

Although this method can realize programming by using metal wire connection after the ID-tag chip is produced and before the user uses it, it has the following disadvantages: first, the metal connection method requires special connection equipment; second, the customer cannot directly realize on-site programming

Therefore, the production and use of this programmable method are relatively complicated, and it is not a field programmable method

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