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>Parasitic layer-based reconfigurable antenna design by multi-objective optimization
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Parasitic layer-based reconfigurable antenna design by multi-objective optimization
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机译：基于寄生层的可重构天线设计的多目标优化设计
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摘要
A parasitic layer-based multifunctional reconfigurableudantenna (MRA) design based on multi-objective geneticudalgorithm optimization used in conjunction with full-wave EMudanalysis is presented. TheMRA is capable of steering its beam intoudthree different directions simultaneouslyudwith polarization reconfigurabilityudhaving six different modes of operation. The MRA consists of auddriven microstrip-fed patch element and a reconfigurable parasiticudlayer, and is designed to be compatible with IEEE-802.11udWLAN standards (5–6 GHz range). The parasitic layer is placedudon top of the driven patch. The upper surface of the parasitic layerudhas a grid of 5 5 electrically small rectangular-shaped metallicudpixels, i.e., reconfigurable parasitic pixel surface. The EM energyudfrom the driven patch element couples to the reconfigurableudparasitic pixel surface by mutual coupling. The adjacent pixels areudconnected/disconnected by means of switching, thereby changingudthe geometry of pixel surface, which in turn changes the currentuddistribution over the parasitic layer, results in the desired modeudof operation in beam direction and polarization. A prototype ofudthe designed MRA has been fabricated on quartz substrate. Theudresults from simulations and measurements agree well indicatingud8 dB gain in all modes of operation.
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