2.4/5 GHz WLAN crescent antenna on flexible substrate

In this paper, we present a CPW-fed crescent antenna for WLAN/Wi-Max applications. The antenna is fabricated using a flexible Rogers substrate, which can be mounted on any surface. The proposed antenna is composed of an outer circular slot with an inner circular patch, whose centers are non-coinciding. The patch has an additional horizontal slot along its diameter. The proposed antenna was simulated using ADS and HFSS software. The antenna is characterized by its wide impedance bandwidth ranging from 2.4 GHz to 9.5 GHz. The antenna radiation is bi-polar. It radiates along the broadside direction at low-frequencies while the beam tilts as the frequency increases. The gain of the antenna ranges between 4.81 dBi to 8.84 dBi.