Ultra-Wideband Antenna for High-Power Operation

Currently wideband antennas are chosen from the class of frequency independent antennas such as planar spirals, conical spirals, log-periodic, bi-conical, bow-tie antennas, TEM horns, and Vivaldi tapers. All of these antennas require some radiating elements to be of very small dimension to achieve millimeter and sub-millimeter wave operation, limiting the maximum radiated power capability. Any increase in the minimum feature size will decrease the high frequency limit thereby reducing the antenna’s overall bandwidth.