Design of ultra wideband rectangular microstrip notched patch antenna

Abstract

the UWB is 7.5 GHz (from 3.1 GHz to 10.6 GHz) was defined by Federal Communications Commission (FCC) for high data rate wireless communication systems. This band needs special and active antenna for transmission and reception of wideband signals. So that, the design of UWB antenna plays very important role in indoor and outdoor wireless systems. Because of more challenges toward the wireless communication, i.e., inter-symbol interference, multi-access interference, and narrow band system interference, the UWB antenna should have the capability of operation during these challenges. The notched microstrip patch antenna was designed using CST microwave studio with limited dimensions and the results are accepted for the UWB that was allocated by FCC. The proposed antenna was fabricated on printed circuit board (PCB) with same dimensions and analysis. Taconic TLY-5 substrate material was used in this small size antenna to give low cost and lighter than those made of FR4 substrate material. The measured results are nearly identical with those of simulation for return loss (S 11 ) and voltage standing wave ratio (VSWR). The simulated radiation patterns are nearly omni-directional radiations over the UWB bandwidth.