Plane X-shaped slit electronic tag

Abstract

The invention relates to the field of RFID, and provides a plane X-shaped slit electronic tag. The tag comprises an antenna, a chip and a substrate, wherein the substrate is rectangular, and accommodates the antenna and the chip. The antenna is matched with the chip. The antenna comprises a radiation surface and a slit, wherein the radiation surface is located on the surface of the substrate. The slit is provided with two arms which are interlaced with each other to form an X shape, and the two arms are in left-right and up-down symmetry, and the intersection point of the two arms is located at the center of the substrate. The chip is located at the intersection of the two arms. According to the invention, a novel design method for the slit electronic tag is provided, and the method can conveniently adjust the impedance of the antenna, and achieve the conjugate matching with the chip. The chip is fixed on a base material through solidification, and can be pasted on the surface of an object during utilization. Because of the radiation characteristics of a magnetic current element of a slit antenna, the electronic tag is especially suitable for a windshield with a metal explosion-proof film, an object surface coated with metal paint, and a human body.

Description

[0001] Technical field: [0002] The invention relates to a flat X-shaped slot electronic label, which belongs to the technical field of microwave communication and is suitable for radio frequency identification within the frequency range of 800MHz to 1200MHz [0003] Background technique: [0004] With the development of RFID in recent years, electronic tags have been widely used in many fields such as logistics, retail and transportation, which have effectively improved management efficiency and greatly saved labor costs. In some metal-like environments, such as car windshields with metal explosion-proof film, surfaces coated with metal spray paint, human body, animal surfaces, etc., due to the mirror effect, the reflected wave and the incident wave form a standing wave. When the electric field is zero, ordinary antennas cannot obtain energy, and the radiation efficiency is reduced or cannot be read. Microstrip antennas can easily solve this problem, but sometimes due to cos...

AI Technical Summary

Problems solved by technology

Slot antennas are widely used in the design of planar anti-metal antennas due to the radiation characteristics of the magnetic flux element. The reflected wave generated by the "mirror magnetic flux" is in phase with the incident wave. The impedance adjustment of the antenna is very difficult. The common matching methods include waveguide feeding, nested slot matching, coupling loop feeding, etc., but it is still relatively difficult.

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