Characterization of Compact Asymmetric Biconical Antenna for IoT Applications

This paper presents the characterization of compact asymmetric biconical antenna for IoT applications. A circular ring added in the middle of the upper cone to reduce the total dimension of the antenna and achieve better performance compared to common asymmetric biconical. The final design of asymmetric biconical has 65 mm (upper cone radius) × 111 mm (total vertical height) with the impedance bandwidth of 0.6 GHz - 6 GHz. The characterization observes the changes of each parameter from the design that affect the resonant frequency shifting and impedance bandwidth. Peak gain achieves from 1.9 dBi - 4.4 dBi with omnidirectional radiation patterns.