Ultra-Wideband Antenna’s Design Techniques

The main objective of this paper is to understand the different methodologies which have been adopted in the recent years in design of Ultra-Wideband Antenna. Methods/Statistical analysis: The patch of the UWB antenna is etched with circular rings to obtain wider bandwidth. Rabbet structured patch can also be utilized for enhancing bandwidth. Ground plane of UWB antenna’s in some cases is parabolic and some have T or L-shape slots to enhance antenna characteristics like increasing bandwidth, band notching at certain frequencies etc. dielectric substrate FR4 is preferred in most of the UWB antenna designs due to less return loss and better bandwidth utilization. Findings: With help of circular patch, more than 160% of Bandwidth is attainable. Use of triangular slots in ground plane can help increase the bandwidth by 45%. A further alteration in ground plane such as grooved ground plane can help minimize the surface waves. Application/Improvements: Since T-shaped slots increases directivity so they are preferred in air-bore applications. L-shaped slots in ground plane helps in RADAR applications.