Development of novel wideband H-plane horn antennas by employing asymmetrical slots based on SIW technology

In this article, a novel wideband horn antenna based on substrate integrated waveguide (SIW) technology is proposed. Design procedure is explained in details. The designed antenna consists of asymmetric radiating slots. Microstrip line is used as a transition between the 50 Ω standard source and the proposed antenna. The proposed antenna is designed to operate from 25 to over 55 GHz which exhibits 75% fractional bandwidth. Peak gain of the proposed antenna varies between 1 and 4 dB in its operating band. In addition, simulated radiation performances show approximately fixed and omnidirectional radiation patterns at the range of the operating frequencies. Furthermore, whole of the proposed antenna is implemented only on a single layer substrate with dimensions of 10.4 mm × 23.65 mm × 1.6 mm. Performances of the proposed antenna have been simulated with two different commercial software. In order to verify the design procedure and simulation results, the redesigned antenna for operation around 14 GHz has been simulated, fabricated, and tested.