一种应用于WLAN的定向辐射紧凑型双频PIFA天线设计

A Compact PIFA Antenna Designed for WLAN with the Characteristics of Directional Radiation and Dual Frequency

设计一款应用于无线局域网(WLAN)的定向辐射紧凑型双频PIFA天线,该天线单元使用PIFA结构以及在上层辐射体上加载2条对称的弯折槽来实现天线结构的小型化,此结构使天线单元谐振于WLAN的高、低频段﹒此外,通过使谐振在WLAN低频段的一对内部的金属臂与中心轴对称金属贴片发生耦合,实现天线结构的进一步小型化﹒该天线单元能够完全覆盖IEEE 802.11系列协议所规定的WLAN全部工作频段,在工作频段内具有较好的增益和一定的定向性,适用于WLAN双频室内无线接入点或点对点通信等应用场合﹒

A compact PIFA antenna with the characteristics of directional radiation and dual frequency is designed for wireless local area network（WLAN）. The antenna achieves the miniaturization by using the PIFA structure and the loading of the two symmetrical bending groove on the upper radiator The structure makes the antenna resonant in WLAN high and low frequency band. Besides, the pair of the internal metal arms couples with the central axisymmetric metal patch in the WLAN low frequency section, the antenna structure is further miniaturized. The antenna can completely cover all the WLAN working frequency bands specified in the IEEE 802.11 protocol, the antenna has good gain and directional radiation in the working frequency range, and the antenna is suitable for indoor wireless access point or point-to-point communication applications in the WLAN dual band.