RFID (radio frequency identification) electronic tag based on fractal spring structure, radio frequency antenna based on fractal spring structure, and preparation method of RFID electronic tag

Abstract

The invention discloses an RFID (radio frequency identification) electronic tag radio frequency antenna based on a planar fractal spring structure. The electronic tag radio frequency antenna is a closed coil formed by multiple coil sections, of a fractal spring structure, which are in sequential end-to-end connection. The invention further provides an RFID electronic tag based on the radio frequency antenna, the radio frequency antenna is attached to a substrate, the telescoping direction of a spring of each coil section is consistent with the stretching direction of the substrate at position of the coil section. The invention further provides a preparation method of the RFID electronic tag. Radio frequency antennas which are of a multi-level spring fractal structure and consistent with stretching direction of the substrate are disposed transversely and longitudinally on the substrate, large deformation redundancy is achieved, axial and transverse stretching and compression can be borne, large bending deformation capability is achieved, and accordingly the RFID electronic tag can be attached to object surfaces which may generate complex elastic deformation, such as human skin and clothes, and application range of RFID electronic tag is expanded.

Description

technical field [0001] The invention relates to the field of flexible electronics manufacturing, in particular to an RFID electronic tag based on a fractal spring structure, a radio frequency antenna and a preparation method. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact two-way communication using radio frequency signals and their spatial coupling and transmission characteristics to realize automatic identification and information collection of stationary or moving objects. RFID electronic tags are composed of three parts: antenna, chip and substrate. The rapid development of Internet of Things technology and intelligent manufacturing technology has brought broader applications to RFID electronic tags, which will gradually penetrate into various fields of human life and work, have a profound impact on human life, and bring more convenience to human beings. Comfortable life. [0003] Patent document US7019695B2 introduces a radio freq...

AI Technical Summary

Problems solved by technology

Existing RFID electronic tags are bendable, but not stretchable or have small stretching deformation, which limits their application range

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