A Carved Fractal UWB Patch Antenna

A new design of a Ultra Wide Band(UWB) antenna is proposed by applying a carved pentagonal star shaped patch antenna(CPSSPA) to a fractal design. This antenna loose its mathematical fractal properties, but keeps the advantages: only one scaled-down and rotated by 36 degrees copy of a CPSSPA is generated and parked homocentricallyto each other. And different fractal scale factors are used for the outline and the carved hole of the CPSSPA. The antenna offers a bandwidth of 7-42 GHz, the radiation patterns and gain are perfect. The structure of the fractal CPSSPA is studied and simulated with HFSS on computer.

I. Introduction

Ultra Wide Band(UWB) technologies are widely used in various applications such as ground penetrating radar systems, automotive collision avoidance system, wall-imaging systems, electronic jamming, wireless LAN, wearable computing and health monitoring, etc. UWB technologies will play more important role in the future due to their excellent advantages of wide RF channel, high data-rate, low transmission power, immune to multipath propagation, etc [1] - [3].