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We introduce and evaluate the concept of switched-element direction finding. In a switched-element system, simultaneous data collection occurs on only a subset of the array's N elements at any given time. The data collection interval is divided into subintervals, and at each subinterval a multiplexer selects a different subset of M<N elements to connect to the data acquisition channels. Since the...
A fully integrated receiver front-end circuit for a 4:1 time division multiplexing of RF signals from an antenna array is introduced. The switching necessary for multiplexing is implemented as an array of low noise amplifiers operating at 2.4 GHz with selectable outputs. The circuit includes on-chip input and output matching networks. A digital controller for rotating through the amplifier inputs...
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