Naresh Kumar Darimireddy1, R. Ramana Reddy2 and A. Mallikarjuna Prasad1
1,3Jawaharlal Nehru Technological University and 2MVGR College of Engineering, India
A novel miniaturized circular fractal antenna is designed by inscribing circular slot on rectangular ground plane and successively forming circular rings connected by semi-circles for circular-fractal patch. Novel modified Coplanar Waveguide (CPW) is used as feed for fractal circular patch. The analysis of parametric variations is performed by consecutive fractal iterations, varying the radius of inscribed circle of ground plane, slots and different ground plane configurations. To further enhance gain and radiation pattern a dual inverted L slots is included in ground plane. From the results it is evident that, the proposed fractal antenna possesses triple bands at 1.8GHz, 3.5GHz and 5.5GHz. These bands are used in Digital Communication Systems (DCS) (1.8GHz), IEEE 802.16d fixed WiMAX (3.5GHz) and IEEE 802.11a WLAN (5.5GHz) applications.
Fractal Geometry, Circular fractal Antenna, WLAN/WiMAX, Coplanar feed, Slotted ground plane
