Power-shifting rf amplifiers

Details Power-shifting rf amplifiers Power-shifting rf amplifiers

H - Electricity

03

F

H03F 3/193 (2006.01) H01Q 1/28 (2006.01) H01Q 23/00 (2006.01) H03F 3/68 (2006.01) H03G 3/30 (2006.01) H04B 7/06 (2006.01) H04L 27/18 (2006.01)

Patent

CA 2420710

Apparatus and method are provided for selectively proportioning, or hot-switching, rf power to a plurality of rf outputs. The method includes: splitting a single rf signal into a plurality of split rf signals using power splitters; separately power amplifying the split rf signals into the plurality of rf outputs in solid-state amplifying devices; selectively proportioning gains of the power amplifying steps; and maintaining a total rf power substantially constant during the selectively proportioning step. Preferably, the method includes series connecting the solid-state amplifying devices in series between a do source- voltage and a lower do voltage; and performing the separate amplifying steps in the series-connected solid-state amplifying devices. The selective proportioning step includes adjusting gate voltages of the solid-state amplifying devices.

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