Prism-Shaped Nonuniformly Distributed Slotted SIW Array With Highly Reduced SLL For mm-Wave Ground Surveillance Application

Two novel designs of triangular prismatically-arranged $1\times 8$ slotted mm-wave SIW antenna array operating at 28 GHz with binomial and gaussian distribution in slot positions have been proposed in this article. Reduction in side lobe and their radiation and impedance characteristics are investigated in this article in the realm of ground surveillance applications. Using binomial and normal distribution, rectangular aperture on metallic wall has been arranged in particular positions. The proposed $1\times 8$ slotted SIW antenna arrays with non-uniformly distributed slots are compared with the structure having uniform offset slot positions. A 2D pattern in $\phi=0^{\circ}$ & $\phi=90^{\circ}$ defines the highly reduced SLL and improved omnidirectional radiation pattern for both the non-linear distribution.