超宽带异向介质平面倒F天线

将异向介质地板引入平面倒F天线（PIFA）的设计中,探索了这种天线的新型辐射特性.修正的PIFA传输线模型中,利用异向介质的谐振电路取代了传统辐射贴片不连续性而引起的电容效应,从物理上有效地解释了这种PIFA辐射性能的提高.数值和实测数据表明,该PIFA天线-10 dB相对带宽超过了100%,谐振频率包含无线局域网络各通信标准及城域网2—6 GHz固定和移动宽带无线接入系统的所有载波频段.在2.4/2.5 GHz时,该天线将得到全向的辐射方向图,而在3.8 GHz和5.1—5.8 GHz频带内,该天线更集 关键词： 异向介质 传输线模型 平面倒F天线 超宽带

Ultra wideband planner inverted-F antenna with metamaterials loading

Metamaterial ground plane is introduced to planar inverted-F antenna (PIFA) design to explore the potential improvement in radiation.Through replacing the conventional capacitance by a metamaterial resonance circuit,the modified PIFA transmission line model physically interprets its novel properties.As is shown,such metamaterial PIFA exhibits a -10 dB return loss for more than 100% of bandwidth with resonance covering all wireless local area network applications and broadband wireless access form 2 GHz to 6 GHz.Nearly omnidirectional radiation pattern is achieved at 2.4/2.5 GHz,but mainly backward radiation is obtained at 3.8 GHz and 5.1—5.8GHz.