Abstract
This paper presents the design of a novel printed slot antenna with broadband characteristics. The antenna size reduction is achieved by the bisection method. The antenna is developed on a thin low loss substrate. A reference annular slot antenna of dimension 30 × 30 mm2 is reduced to 15 × 15 mm2 which is 75% smaller than the reference monopole antenna. The miniaturized slot antenna provides broadband characteristics extending its operation from 3 GHz − 8 GHz making the antenna suitable for terrestrial communications. The miniaturized antenna preserves the omnidirectional radiation pattern of the reference slot antenna. The prototype antenna is fabricated and tested for S-parameter characteristics and radiation characteristics. The proposed miniaturized antenna offers 91% bandwidth with |S11| ≤ −10 dB. The measured gain of the antenna varies from 2.48 dBi to 4.98 dBi with peak gain at 7 GHz. The antenna exhibits good impedance matching and radiation characteristics making the antenna suitable for modern communication systems such as wireless sensor nodes, Internet of Things (IoT), wireless monitoring systems, etc.
Published Version
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