Bandwidth enhancement and decreasing ultra-wideband pulse response distortion of penta-gasket-koch monopole antennas using compact-grounded co-planar wave guides

The concept is to use a grounded co-planar waveguide (GCPW) to enhance useful characteristics of a fractal antenna. In this case 9.54 dB return loss and input impedance bandwidths are increased. The specific candidate antennas are printed fractal monopoles such as the Penta-Gasket-Koch (PGK) antenna. These topical antennas are used to compare a coaxial fed system with GCPW-fed system. A PGK is applied for two bands germane to ultra-wideband (UWB). These are 5.35-7.35 GHz and 10.07 to 11 GHz (refer to VSWR <; 2). A modified PGK is presented with a wideband input match from 4.25 to 11 GHz (refer to VSWR <; 2). Results suggest that these antennas are possible candidates for Federal Communications Commission (FCC) UWB radio short fat pipe systems with time-domain analysis indicating reduced ringing for impulse excitation over the proposed FCC bandwidth. In addition, the correlation between the time-domain transmitting antenna´s input signal and the receiving conventional PGK antenna output signal is obtained which demonstrates approximately 89% antipodal resemblance. The modified PGK antenna improves the antipodal resemblance up to 95%