Abstract
Grounded coplanar waveguides (GCPW) are used to enhance antenna characteristics, namely, reference to the VSWR <; 2 bandwidth and the input impedance dynamic range. A printed fractal monopole such as the Sierpinski-Carpet (SC) antenna can be considered as a good candidate for comparing a coaxial-fed system with a GCPW-fed antenna. Conventional SC can be applied at 6.25-8.4 GHz (ref to VSWR <; 2 ), while modified SC matches throughout the 4.65-10.5 GHz (ref to VSWR <; 2 ). Clearly, this new feeding technique changes the behavior of the fractal elements from multiband to wideband. The GCPW-fed antennas have a low crosspolar field and a well-behaved pattern over the enhanced ones. This system of antennas is a possible competitor for the FCC ultrawideband radio short, fat pipe systems. In addition, time-domain analyses are performed to realize the proposed antenna time-domain application over ultrawideband.
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