Noise performances optimizationudof GAAS monolithic microwave activeudrecursive filters using noise wave techniques

摘要

This article deals with the improvement of noise figure for microwave active recu rsive filters. We show, using a noise wave analysis [1], how the noise factor of a first-order recursive structure can he effectively minimized, by using appropriate unbalanced power dividers/combiners in association with an amplifier of given gain and noise factor values. We start from measured results of monolithic filters and validate our approach with simulated examples.