Electrically coupled dual semicylindrical dielectric resonator antenna with inverted arrangement for wideband applications

In this article, an electrically coupled dual semicylindrical dielectric resonator antenna (SC-DRA) is presented and discussed for wideband applications. The two SC-DRAs are placed in an inverted arrangement and fed by a coaxial probe to excite the fundamental mode TM11 delta and higher order mode TM21 delta. In the proposed design, wideband performance is obtained by combining the fundamental and higher order mode. Proposed wideband antenna is showing simulated and measured input impedance bandwidth (|S-11| <= -10 dB) of 57.94% (3.8-6.9 GHz) and 64.4% (3.38-6.6 GHz), respectively. The far field radiation patterns are found to be consistent and 3-dB beamwidth of 49 degrees and 30 degrees has been achieved at 4.11 and 6.48 GHz, respectively within the working band. This design attains an average gain of 5.65 dBi and radiation efficiency of 97%, respectively.