We demonstrate a chip-scale (<1 mm(2)) sensor, the Planar Fourier Capture Array (PFCA), capable of imaging the far field without any off-chip optics. The PFCA consists of an array of angle-sensitive pixels manufactured in a standard semiconductor process, each of which reports one component of a spatial two-dimensional (2D) Fourier transform of the local light field. Thus, the sensor directly captures 2D Fourier transforms of scenes. The effective resolution of our prototype is approximately 400 pixels.

WSNsTo come up with a general WSN link budget, consider a representative WSN system operating with a carrier frequency of 2.4 GHz at a communication distance of 10 m. Most WSN nodes operate in peer-to-peer ad hoc networks, where each node can potentially act as a relay between other nodes. Consequently, WSN transceivers must balance power specifications evenly between the

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