A power amplifier employing thin-film ferroelectric phase shift elements.

摘要

An amplifier includes a signal splitter operable to receive an input signal and generate at least first and second split signals, a first amplifier adapted to receive the first split signal and to generate a first amplified signal, and a second amplifier adapted to receive the second split signal and to generate a second amplified signal. A combining circuit is adapted to generate an output signal which is a sum of the first amplified signal and the second amplified signal. The amplifier further includes a phase control circuit arranged in a signal path of one of the first and second amplifiers, the phase control circuit comprising at least one thin film ferroelectric element. The amount of phase shift provided by the phase control circuit is selectively variable as a function of a control signal applied thereto.