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The lighting system consisting of LED street light system, power grid, photovoltaic (PV) arrays and inverting control system of grid-connected PV was investigated. The excess power generated from PV can be transported into power grid through an inverter which changes direct current (DC) into alternating current (AC) using current hysteresis control. PLC controls when to light LED and whether the battery...
Modern wireless systems require low-profile antennas for high integration and low cost. Moreover, balanced antennas with differential configurations have the advantages of easy integration and low cross-polarization. This talk presents a class of novel printed balanced phase-reversal antennas with small lateral footprint and interesting properties. This type of antenna may be regarded as an evolution...
A novel full-space scanning periodic phase-reversal leaky-wave antenna array is proposed, designed in offset parallel stripline technology, and demonstrated experimentally. This antenna radiates from its small phase-reversing cross-overs, which leads to a small leakage factor and subsequently a large directivity. The operation principle of the antenna is explained from the Brillouin diagram, which...
Simulated return loss and radiation patterns are shown. The antenna is well-matched around center frequency of 24 GHz. The gain at 24 GHz is 10 dBi. At frequencies other than 24 GHz, the maximum beam almost keeps constant at the broadside. This result proves that the beam bandwidth of the antenna is improved and the beam squinting problem is suppressed by the proposed center feed structure.
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