A novel 1-decade super wideband UHF antenna for GPR and impulse radio applications

The Bulbous concept is revived to feature both antenna miniaturization and guarantee the full super-wideband characteristics (coexistence of both impedance bandwidth and pattern bandwidth). The concept is modified by a novel transformed mathematic curve, which inscribes the concave/ convex shapes of the proposed antenna. The technique reduces the many design parameters to only a small number of design parameters. As a-proof-of-concept, we report herewith a super-wide-band antenna, which has only three design parameters, one for inscribing the antenna circumference, other twos for feeding boundary-matching. The distinguished features of this technique is that the area of the antenna can be set fixed inside the Wheeler´s radiancircle of a wavelength radianlength, and the antenna is forced to evolve inside that prefixed radius. The proposed convex antenna is capable of full coverage of more than 1-decade impedance bandwidth and pattern bandwidth, also a negligible group delay is obtained. The antenna is suitable for deep-GPR and impulse tactical radio location and navigation applications.