Abstract
The tag antenna exhibiting operation in European and North American regions covering major UHF RFID bands resonating at 866 MHz and 915 MHz, respectively, has been designed in this paper. The tag antenna operating in single UHF RFID region is converted to operate in dual UHF RFID region band tag antenna by modifying its geometry and optimizing the final geometry to obtain resonance at the required resonant frequencies. The tag antenna proposed in this paper comprises a meandered line element with extended lower stub to obtain additional band at European Region. The designed tag employs Alien Higgs-4 RFID chip having capacitive reactance. The designed tag utilizes inductive spiral loop to obtain conjugate impedance to match the capacitive RFID IC. Further, the designed modified tag antenna is simulated and its performance is analyzed based on different parameters such as its resistance, reactance, radiation efficiency, realized gain, etc. Also, it has been seen that the designed dual band antenna shows bidirectional and omnidirectional radiation pattern in E-plane and H-plane, respectively.
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