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A 60 GHz cavity-backed antenna array integrated on high-resistivity silicon is demonstrated. The antenna design makes use of Through-Silicon-Vias (TSV), silicon micromachining, and wafer-to-wafer bonding to meet the bandwidth and radiation gain requirements for short-range multi-Gbps communications. The fabrication process is presented. Simulated and experimental results show that the antenna element...
We analyze the optimal number of sensor nodes that should participate in a beamforming process in order to minimize the energy expended by nodes in a sensor network. As we increase the number of sensor nodes involved in beamforming (for a fixed energy per bit to noise power spectral density required at the receiver), the transmit power of each node is significantly reduced, but the overhead in implementing...
We present an adaptive distributed beamforming approach for sensor networks, wherein sensor nodes coordinate their transmissions to form a distributed antenna array that directs a beam toward an airborne relay (an unmanned aerial vehicle). Distributed beamforming using sensors is challenging since the number of nodes and their exact positions are unknown. A simulation model was implemented to study...
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