Abstract
ABSTRACTA novel technique is applied on fractal monopole antenna to enhance gain for ultra wideband (UWB) applications. The fringing field effect of the antenna is increased by using dielectric superstrate, and it is designed by fabricating rectangular conductor on single side of the superstrate with dimension 10 × 21.5 mm2. The fractal structure is designed by the identical triangle structure in the radiating patch. The dielectric superstrate is placed on the fractal monopole antenna. At the time of feeding, the conductor of the superstrate is connected through ground plane of the antenna. The overall dimension of the fractal monopole antenna with superstrate is 24.5 × 21.6 × 3.15 mm3. The measurement result of the reflection coefficient is below −10 dB indicating impedance bandwidth of 3.1 to 11 GHz. The measured radiation patterns are also improved and peak gain of the conventional antenna increases approximately 1.6 dB by using superstrate with reference to conventional design. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:482–488, 2017
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