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In this paper, and designed a low cost, small, broadband, high-gain UHF RFID tag antenna, the first of the RFID technology research and development was reviewed, the system describes the basic RFID and working principle, classification The typical division of work and the frequency RFID applications, and determine the basic antenna forms.
Then, on the basic theory of microstrip antenna design were described in detail description of the design to meet the requirements of the antenna coupling and feasibility of the structure, determine the specific parameters of the antenna and the substrate dielectric constant of the low-frequency capacitance measurement method. Through computer simulation software IE3D antenna current, the antenna reflection coefficient and the pattern of such antennas to achieve the most optimized to get good radiation performance of microstrip rectangular patch antenna. Actual production of the antenna and compares the measured and simulation results, rectangular microstrip patch antenna or close to the experimental data to meet the targets required to prove the theory of the antenna.
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