A radial power amplifier includes a coaxial input port and a radial power splitter. The radial power splitter includes a radial transmission line and a number of radial transmission line to microstrip transitions spaced about the radial transmission line for splitting input signal equally among a number...http://www.google.com/patents/US4641106?utm_source=gb-gplus-sharePatent US4641106 - Radial power amplifier
