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This paper discloses a circularly polarized antenna, ultra high frequency radio frequency identification tag includes: Based on a cylindrical shell, the shell is composed of a casing and a casing, wherein the upper shell is arranged on the inner side of a clamping groove; an antenna control module, are fixedly arranged in the shell; a radio frequency module, arranged in the slot, and the antenna control module is electrically connected; a radio frequency cable, and the RF module is electrically connected, and extends out of the upper shell. Originally in the outside of the shell is welded by means of sealing connection RF cable provided by the utility model, encapsulated into the shell, the shell of the whole sealing, waterproof performance is very excellent at. This product volume is much smaller than other products, can damage to the ground or floor structure decreases when, at the same time ABS shell material for shell of the product, the grinding pressure performance, make the product has better convenient construction, but also improves the signal

Circular Polarized Antenna Design for RFID Logistics Label based on Ultra High Frequency