Indian Journal of Science and Technology

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In this paper, we have achieved two ultra wideband antennas by applying fractal geometry with co-planar waveguide (CPW) feeding technique. These antennasare designed on dielectric substrate εr= 4.3 and thickness h = 1.53 mm. The return loss of first antenna design is achieved a good input impedance matching throughout the pass band from 2.5 GHz to 11GHz. The second antenna offers the impedance matching from frequency range 2.1GHz to 12GHz. The proposed antennas can provide an impedance bandwidth more than100% at VSWR<2. Second antenna helps to increase impedance bandwidth by reducing the ground plane. The simulated radiation pattern of antenna is nearly omni-directional. Such type of antenna can be useful for mobile and wireless communication.

Keywords

Microstrip Antenna, Monopole Antenna, CPW-feed and UWB Antenna
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