Abstract
This paper presents a miniature microstrip antenna at 915 MHz in the ISM “Industrial Scientific and Medical” band. This microstrip antenna is designed for RFID tag system, using the DGS (Defected Ground Structure) and the slots technique, on FR4 substrate. The simulation is performed using CST Microwave Studio. The total area of the final circuit is 49.3 × 55.57 mm2. The validated antenna has a good matching input impedance range from 909 MHz to 921 MHz with a stable radiation pattern, a loss return of −23.72 dB, a directivity of 1.85 dB, and a gain of 1.21 dBi.
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