Virginia Tech researchers have come up with a compact ultrawideband antenna (CUA) that has potential applications in medical, military, automotive, and home entertainment devices. Most notably, it is said to operate at nearly the theoretical limit on antenna size and performance. According to the official description, the CUA "has at least 10:1 instantaneous bandwidth and nearly constant omnidirectional radiation patterns, high efficiency ( > 95%), and 5 dBi realized gain over the entire band. In addition, the antenna provides a short pulse radiation characteristic. The electrical size of the CUA is approximately 1/10 wavelength at the lower bound of the band, which is two times smaller than conventional ultrawideband antennas."
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