Novel RFID circularly polarized antenna

• Main Authors: DING XIAO, PEI YINGZHOU
• Format: Patent
• Language: English
• Published: 10.02.2016
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention discloses a novel RFID circularly polarized antenna, and belongs to the technical field of antennas. The antenna comprises a dielectric substrate, a metal ground plate, a square ring radiation patch and a Wilkinson power divider, wherein the metal ground plate is arranged on the lower surface of the substrate; and the square ring radiation patch is arranged on the upper surface of the substrate. The antenna disclosed by the invention is in a planar structure, and applicable to application in a plurality of environments; the radiation of the antenna is a bidirectional circularly-polarized radiation; and compared with a unidirectional radiation, the bidirectional circularly-polarized radiation has higher practicability on an RFID system and meets the requirements of the occasions, such as automatic fare collection systems for expressways and partial production lines, employing the RFID system.