Abstract: Data-storage devices and methods are disclosed. An exemplary data-storage device includes a medium having at least two dimensions and having a surface. Multiple data-containing loci are arranged on the surface. Each locus has a respective amount of magnetically responsive particles. The respective amounts are different in at least some of the loci. The respective amount at a particular locus corresponds, at least in part, to a respective unit of data contained by the locus. The loci can be substantially two-dimensional or three-dimensional, the latter being configured as respective holes, containing respective amounts of magnetically responsive particles, extending depth-wise into the medium. The loci typically range in size from the micrometer range to the nanometer range. The medium can be any of various configurations such as cards, sheets, films, etc.

Abstract: Radar systems are disclosed that include a signal generator, an antenna, a switching circuit, an I/Q sampling and signal-demodulation (demodulation) processor, and a FFT processor. The signal generator produces energization signals. The antenna has multiple individual antenna elements. The switching circuit is configured to deliver the energization signals to a selected antenna element at a respective moment in time to cause the selected antenna element to transmit a respective radar signal in response to the energization signal. At least one element receives a corresponding return-radar signal before the switching circuit selects a next antenna element to transmit a respective radar signal. The demodulation processor receives the return-radar signals from the antenna elements and demodulates the return-radar signals. The FFT processor fast-Fourier transforms the return-radar signals.

Abstract: Data-storage devices and methods are disclosed. An exemplary data-storage device includes a medium having at least two dimensions and having a surface. Multiple data-containing loci are arranged on the surface. Each locus has a respective amount of magnetically responsive particles. The respective amounts are different in at least some of the loci. The respective amount at a particular locus corresponds, at least in part, to a respective unit of data contained by the locus. The loci can be substantially two-dimensional or three-dimensional, the latter being configured as respective holes, containing respective amounts of magnetically responsive particles, extending depthwise into the medium. The loci typically range in size from the micrometer range to the nanometer range. The medium can be any of various configurations such as cards, sheets, films, etc.