Wideband ceramic anti-metallic label

Abstract

The invention relates to the field of RFID (Radio Frequency Identification) and provides a wideband ceramic anti-metallic label. The wideband ceramic anti-metallic label is characterized by comprising an antenna, a chip and a base plate, wherein the base plate is used for containing the antenna and the chip, and the antenna and the chip are matched; the antenna comprises a radiating part, an impedance-regulating part, a coplanar coupling part and a grounding surface, wherein the radiating part, the impedance-regulating part and the coplanar coupling part are positioned on the front surface of the base plate, the grounding surface is positioned on the back surface of the base plate, and the chip is positioned on the lateral surface of the base plate; the chip is connected with the impedance-regulating part and the grounding surface. The ceramic anti-metallic label has a small size, the Q value and the broadening bandwidth of the antenna can be greatly decreased through the special design of the antenna, and the performance of the ceramic anti-metallic label is superior to that of an ordinary large-sized anti-metallic label, so that the ceramic anti-metallic label can be conveniently applied to many metal environments which have smaller sizes and simultaneously have higher requirements on reading distances and bandwidth.

Description

Technical field: [0001] The invention relates to a broadband ceramic anti-metal tag, belonging to the technical field of microwave communication and suitable for radio frequency identification in the frequency range of 800MHz to 1GHz Background technique: [0002] In recent years, with the development of RFID, more and more electronic tags are used in the fields of logistics and anti-counterfeiting. Ordinary flat paper labels attached to the metal surface have reduced radiation efficiency, impedance and radiation pattern changes, resulting in a significant decrease in the reading distance of such labels or even unreadability. Therefore, it is usually necessary to use anti-metal labels for metal environments. In recent years, ceramic anti-metal labels use ceramic materials with high dielectric constant as the substrate, which greatly reduces the size of the label and improves the performance of the label on metal objects, especially small-sized metal parts. on the usage rate...

AI Technical Summary

Problems solved by technology

However, due to the higher the dielectric constant of the ceramic medium, the larger the Q value, most of the energy is stored in the medium, and the bandwidth of the antenna is extremely narrow, only a few tenths of ordinary large-size anti-metal tags, which limits the use of tags. use

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