H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 3/19 (2006.01) H03F 1/02 (2006.01) H03F 1/30 (2006.01) H03F 3/193 (2006.01) H03F 3/21 (2006.01) H03F 3/60 (2006.01)
Patent
CA 2389477
A microwave amplifier and more particularly to a microwave amplifier configured as a Doherty amplifier. The amplifier includes a carrier amplifier, a peak amplifier, a Lange coupler at the input of the amplifiers and quarter wave amplifier at the output of the amplifiers. In order to further increase the efficiency, the Doherty amplifier is formed from HEMT/HBT technology to take advantage of the low-noise performance of HEMTs and the high-linearity of HBTs to form a relatively efficient amplifier that functions as a low-noise amplifier at low power levels and automatically switches to high-power amplification for relatively high- impact RF power levels.
Gowling Lafleur Henderson Llp
Northrop Grumman Corporation
Trw Inc.
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