CTS Antenna Array Optimization using Passive Corrugated Ground Plane

In this paper, the usage of passive corrugations to improve the performances of continuous transverse stub (CTS) arrays is investigated. Corrugations are employed as a secondary radiation source to reemit surface energy and to modulate surface waves at the antenna surface. Thanks to this effect, we demonstrate that the number of radiating slots of the CTS array can be halved maintaining the electrical performances unchanged (gain, bandwidth, and radiation pattern). The new array has a simplified feeding network, is more compact and lighter than the original configuration. Besides, the manufacturing complexity and cost of the new configuration are significantly reduced.