Chip impedance matching For UHF-band RFID TAG

This paper is concentrated on analyzing the performance of passive Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) tags in which comparison between datasheet impedance and measurement impedance have been used. The novel passive antenna is fabricated by using Polyester (PET) dielectric substrate with permittivity 3.2. The size of antenna is 77 × 14 × 0.05 mm. The HFSS simulator is used for optimizing the proposed antenna. The antenna impedance can be conjugate matched to common UHF chips in market, only by tuning two parameters of the antenna.