Ultra-wideband planar antennas: Slot vs. monopole

Planar antenna designs have many advantages such as low-profile, light-weight, and ease of fabrication and integration. Here, a planar monopole and a slot-type antenna of the same overall size on a thin substrate with coplanar waveguide feed are compared. This paper summarizes a numerical investigation using both frequency and time-domain solvers. The results serve to guide the future analysis of broadband antennas for ground penetrating radars.