Low temperature cofired ceramic antenna and very high frequency RF identification tag antenna formed of the same

Abstract

The invention relates to a low temperature co-firing ceramic antenna and a VHF(very high frequency) radio frequency identifying label antenna formed by the low temperature co-firing ceramic antenna. The antenna adopts the low temperature co-firing ceramic as a base plate and adopts metal wire to be printed on the low temperature co-firing ceramic base plate so as to from a needed shape. The VHF radio frequency identifying label antenna formed by the low temperature co-firing ceramic antenna comprises an L-shaped grounding metal wire which is printed on the low temperature co-firing ceramic base plate, a spiral micro strip eradiating unit which is connected with the L-shaped grounding metal wire, and a zigzag line shape feed-in metal wire which is connected at the connecting point of the L shape grounding metal wire and the spiral micro strip eradiating unit. The other end of the zigzag line shape feed in metal wire is the feeding line inputting end; the under layer of the L-shaped grounding metal wire, the spiral micro strip eradiating unit and the zigzag line shape feed in metal wire is provided with an under layer grounding metal plate which adopts the low temperature co-firing ceramic as a base plate; the other end of the L shape grounding metal wire is connected with the under layer grounding metal plate through a through hole between two layers. The present invention reduces the area of the antenna and reduces the wastage, which can realize the whole integration of the RFID label.

Description

technical field [0001] The invention relates to a radio frequency identification tag antenna. In particular, it relates to a method that can greatly reduce the area of ​​the antenna, increase the gain of the antenna, and reduce the loss while ensuring the performance of the UHF RFID tag, and can easily achieve the same value as the load impedance by adjusting the size of the feeding metal wire and the grounding metal wire. A matching low temperature co-fired ceramic antenna and a VHF radio frequency identification tag antenna formed therefrom. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) technology is an automatic identification technology that has matured since the 1980s. It performs non-contact two-way communication through radio frequency, so as to achieve the purpose of identification and exchange data. With the development and maturity of large-scale integrated circuit technology, the volume of radio frequency iden...

AI Technical Summary

Problems solved by technology

At present, the inverted F antenna is usually printed on the PCB substrate, but if it is made on a substrate with low dielectric constant and high loss such as film and ordinary paper for 915MHz UHF RFID tags, its length is about a quarter of the resonance frequency One wavelength, the area is difficult to further reduce

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