Design of Compact Slot Antenna Array using Half-Mode Substrate IntegratedWaveguide Technology

Abstract

In this work, a novel half-mode substrate integrated waveguide (HMSIW) fed compact slot antenna array has been presented. The HMSIW structure contributes to reduce the size of antenna by nearly half compared to the substrate integrated waveguide (SIW) structure. A new type of compact slot has been introduced in the HMSIW structure which reduces the antenna size further without degrading the characteristics like gain, copolarized radiation over the principal planes and input impedance compared to those with the conventional SIW structure. At 16.8 GHz, the conventional slots (vertical slot) can not be etched within the width of the HMSIW structure as the length of slots are long enough compared to the width of HMSIW structure. Hence, two types of miniaturization techniques have been used in this design. One type of miniaturization technique has been achieved by using HMSIW and another type of miniaturization technique has been achieved by using a new type compact slot. The slot length and width have been optimized for better performance of the HMSIW.