Globally universal ultra-high frequency RFID reader antenna

Abstract

The invention discloses a globally universal ultra-high frequency radio frequency identification device (RFID) reader antenna. The globally universal ultra-high frequency RFID reader antenna is characterized by comprising a laminated panel antenna, a horizontally wound plate and an input connector, wherein the laminated panel antenna comprises an upper radiant panel, a lower radiant panel and a floor plate from top to bottom; the horizontally wound plate is fixed between the lower radiant panel and the floor plate; one end of the horizontally wound plate is connected with the lower radiant panel through a feed probe I, while the other end is connected to a conductor in the input connector through a feed probe II; the upper radiant panel, the lower radiant panel, the horizontally wound plate and the floor plate are sequentially fixed through fixing screws; and air clearances are reserved among the upper radiant panel, the lower radiant panel, the horizontally wound plate and the floor plate through shaft sleeves arranged at the position of the fixing screws. Through horizontally wound plate feed technology and laminated panel configuration, the antenna circular polarization bandwidth and the input voltage standing wave ratio are low, the processing is simple and the cost is low. Therefore, the globally universal ultra-high frequency RFID reader antenna is applied to an ultra-high frequency RFID system in any country or region in the world.

Description

technical field [0001] The invention relates to an RFID reader-writer antenna, in particular to an RFID reader-writer antenna covering global UHF frequency bands. Background technique [0002] Radio Frequency Identification (RFID) technology is a wireless communication technology that can identify specific targets and read and write related data through radio frequency signals. It has been widely used in animal identification, logistics management and electronic toll collection. Compared with other passive RFID technologies, passive UHF RFID is recognized as the most promising due to its fast data transmission speed and long working distance. Different countries and regions assign different operating frequencies to UHF RFID systems. The working frequency band in Europe is 865-868MHz, the working frequency band in North America is 902-928MHz, and the working frequency band in Japan is 952-955MHz. Based on the status quo of my country's radio spectrum allocation, the Ministr...

AI Technical Summary

Problems solved by technology

For the double-feed method, it is necessary to use a 3dB bridge to feed the two orthogonal points of the microstrip antenna to achieve circular polarization, but the antenna structure is complicated, the volume is increased, and the cost is increased.

The multi-feed method includes three-feed method and four-feed method, obviously the antenna structure is more complex

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