Method and system for increasing the power efficiency of a balan

Details Method and system for increasing the power efficiency of a balan Method and system for increasing the power efficiency of a balan

1995-10-31

1997-03-25

Mullins, James B.

Amplifiers

With diverse-type art device

With process control system

330 55, 330276, 330286, 330306, H03F 324

Patent

active

056148631

ABSTRACT:
A system for increasing the power efficiency of a balanced amplifier driven antenna arrangement includes a push-pull class B power amplifier circuit which is responsive to a periodic, time varying input signal and generates at least two output signals in response thereto. The arrangement also includes a balanced antenna exhibiting a relatively high impedance at the second harmonic of the input signal. The arrangement further includes at least one transmission line operatively coupled between the power amplifier circuit and the balanced antenna to provide the at least two output signals to the balanced antenna. The at least one transmission line has a length which is one-eighth of the wavelength of the input signal or odd multiples thereof, and thereby reflects back to the power amplifier circuit a substantially short circuit at the second harmonic of the input signal.

REFERENCES:
patent: 3821655 (1974-06-01), Fisher
patent: 4097814 (1978-06-01), Cohn
patent: 4490668 (1984-12-01), Sterzer
patent: 5274341 (1993-12-01), Sekine et al.

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