Prof. Itoh's Contributions to Antennas [Awards]

Prof. Tatsuo Itoh is a preeminent researcher, mentor, and educator, whose efforts have influenced many in the field of electromagnetics and microwave engineering. Although Prof. Itoh may be best known for numerical techniques and periodic/metamaterial structures, he has also left his mark in the antenna community. Some of Prof. Itoh's antenna-related works include antennas and arrays that integrate active components such as push–pull power amplifiers and coupled oscillators to enable efficient radiation, spatial power combining, and beamsteering; broadband planar quasi-Yagi antennas that produce highly directive end-fire radiation [S34]–[S35]; uniplanar-compact photonic bandgap (PBG)-enhanced high-gain antennas; retrodirective arrays that can reradiate an incoming signal toward the source without a priori knowledge of the arrival direction; and metamaterial antennas that support unconventional radiation characteristics such as broad spatial-angle frequency scanning and negative/zeroth-order mode radiations.