应用于认知无线电的频率可重构天线

摘要

This paper presents a frequency reconfigurable monopole antenna for cognitive radio applica-tions.An open slit is cut in the stepped rectangular patch,and a short circuit square ring gap is etched in the ground plane.In order to realize the frequency reconfiguration,six switching elements are loaded in the slit and ring.By changing the states of switches,three modes (ultra-wideband,single-band,dual-band)can be achieved.The results of simulation and measurement show that the antenna can work in the UWB and WiMAX band.%本文提出一种应用于认知无线电的频率可重构单极子天线.阶梯型辐射单元刻蚀有一个开路缝隙,接地板刻蚀有一个短路方环形缝隙.在开路缝隙和短路缝隙上加载6个开关元件,通过控制开关的不同组合状态可以实现超宽带、单频带、双频带3种模式,从而实现频率可重构.仿真和测量结果表明天线可以工作在 UWB以及 WiMAX频段.