Multipixel cameras represent an emerging topology for arrays receivers, improving speed and accuracy of both security scanning\r\nsystems and radioastronomical sky surveys by means of a matrix of phased elements. Difficulties in the generation and proper\r\ndistribution to each pixel of the local oscillator signal still limit their use to frequency ranges below a few GHz or at least\r\nseriously affect the complexity of the implementable cameras. This work presents a full comparison between two possible system\r\narchitectures, alternatively based on LO frequency multiplication or subharmonic mixing strategies, aiming to overcome the\r\naforesaid limitations: design and performance of two compact test vehicles in MMIC technology, both operating in the Q-band\r\nfrequency range with ultrabroadband IF section, are reported.
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