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In this paper, a novel microstrip antenna using interdigital capacitor is proposed. The DGS technology is used to further reduce the size of the antenna. The size of the improved antenna is 24% of traditional rectangular microstrip antenna, and the antenna has frequency range 2.4–2.52 GHz with maximum gain of 2.35 dB, meet the requirement for ISM band applications, realize the miniaturization design.
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