Amplifiers – With semiconductor amplifying device – Including distributed parameter-type coupling
Patent
1992-01-03
1993-05-11
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including distributed parameter-type coupling
330295, H03F 360
Patent
active
052105075
ABSTRACT:
A harmonic reaction amplifier (HRA) apparatus and method using a directional filter, including an HRA input for receiving an input signal, a divider coupled to the HRA input, the divider for splitting the input signal into a first divider signal and a second divider signal, an amplifier coupled to the divider, the amplifier for amplifying the first divider signal and the second divider signal, a directional filter coupled to the amplifier, the directional filter to filter the first and second divider signals to produce a filtered first divider signal and a filtered second divider signal, a combiner for combining the filtered first divider signal and the filtered second divider signal to produce an output signal, the combiner coupled to the directional filter, and an HRA output coupled to the combiner, the HRA output to receive the output signal from the combiner. The HRA can be used in a microwave radio.
REFERENCES:
patent: 2942209 (1960-06-01), Cohn
patent: 3781718 (1973-12-01), Gittinger
patent: 4772856 (1988-09-01), Nojima et al.
patent: 5083094 (1992-01-01), Forsberg
An article entitled "Harmonic Reaction Amplifier: A Novel High-Efficiency and High-Power Microwave Amplifier" by S. Nishiki & T. Nojima, 1987 IEEE MTT-S Digest, Copyright 1987, pp. 963-966.
An article entitled "High Efficiency Microwave Harmonic Reaction Amplifier" by T. Nojima & S. Nishiki, 1988 IEEE MTT-S Digest, copyright 1988, pp. 1007-1010.
Motorola Inc.
Mottola Steven
Nehr Jeffrey D.
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