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In many designs, much of the signal processing is done in analog. But as digital speeds go up and power and cost go down, the data converters get pushed closer and closer to the antenna. An ideal system, suggests Altera application specialist Colman Cheung, would drive the antenna elements directly from DACs. But such a design is not technically feasible in 2013, especially for trans-GHz RF. - See more at: Looking Inside Scanned-Array Radar Signal Processing