Semi-circular Slotted Monopole Antenna for Future Ultra-Wideband Applications

Abstract

Semi-circular slotted monopole antennae are investigated for IoT based ultra-wideband (UWB) applications. The studied antennae are compact and of small size (40mm x 30mm x 1.53mm) with a 50Ω co-planar waveguide (CPW) - feed line. The conventional circular disc monopole antenna impedance bandwidth is improved by introducing multiple cuts on the circular disc. Three designs are examined and compared to the classical circular monopole design: iteration 1, iteration 2 and the proposed antenna with nine semi-circular rings. The proposed antenna offers the measured impedance bandwidth from 3.5 GHz to 60 GHz and beyond, which is comparatively 6 times of normally achieved by conventional antenna. The measured radiation patterns of semi-circular rings antenna are presented in both H- and E-plane.