Patent ID: 7492237
Filing Date: 2009-02-17
Classification: H03G

Abstract:
1. A gain compensation circuit, applied to a microwave signal processor, the gain compensation circuit comprising: a first amplifier configured to amplify an input signal of the microwave signal processor; a second amplifier; a filter disposed between the first and second amplifiers; a first attenuator disposed between the first amplifier and the filter for reducing return loss of the microwave signal processor; a second attenuator disposed between the second amplifier and the filter for reducing return loss of the microwave signal processor; and a third attenuator electrically connected to the output of the second amplifier for reducing noise figure of the microwave signal processor and providing first and second gain compensations; wherein the first gain compensation keeps the gain of the microwave signal processor constant under various temperatures, and the second gain compensation adjusts a nominal gain of the microwave signal processor.