Design of a Reduced Side Lobe Level Slotted Waveguide Array

In this paper, a slotted substrate integrated waveguide array is designed at 26 GHz, having seven elements. This linear array of longitudinal slots is devised by applying Elliott’s modified method, which includes the effect of internal higher-order mode coupling. Return loss for simulated results is well below −20 dB with a gain of 12.3 dB with SLL of −20.7 dB.