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Wireless radio frequency identification technology ( RadioFrequencyIdentification, RFID ) is from nineteen ninties rise of a RF signal using non-contact two-way communication, automatic target recognition and access to relevant information and data wireless communication technology.

RFID antenna type: RFID plate antenna circular polarization antenna, RFID, RFID, RFID built-in antennalinear polarization antenna, 915 antenna. RFID applications: vehicle identification system, close to read and write data..

Antenna is a kind of electromagnetic wave form the front end RF signal power received or radiation out of the device, circuit and space interface device, used to realize the traveling wave and free space waveenergy conversion. In the RFID system, antenna for electronic label antenna and reader antenna in two categories, respectively assume the received energy and emission energy function. The current RFIDsystem mainly concentrated in the LF, HF ( 13.56MHz ), UHF ( 860-960MHz ) and microwave frequencies,different working frequency band antenna RFID system principle and design of a fundamentally different.RFID antenna gain and impedance characteristics of RFID system function range influence, RFID systemworking frequency in turn on the antenna size and radiation loss of certain requirements. So RFID antenna design is related to the success of the whole RFID system.

Application antenna for near distance RFID, general and reader are integrated together, for the remoteRFID system, reader antenna antenna and reader generally take a separate type structure, through theimpedance match coaxial cable connection. In general, the directional antenna with less echo loss, more suitable for label application; because the label placement direction is not controllable, reader antennagenerally use circular polarization. Reader antenna for low profile, small and multiple frequency coverage.