Abstract

We present a model for noise generated in a two-channel millimeter-wave imaging system and use it to develop a phase switching scheme that generates a minimum amount of noise in the difference image between the two channels. The method switches between zero and pi over half the apertures in a distributed-aperture millimeter-wave imager. Simulations and quantitative experiments validate that this approach improves performance over switching between zero and a random phase value. The improved performance is visually evident in images of an extended object.

© 2016 Optical Society of America

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