适用于移动手持终端的宽带PIFA设计(GSM850-WiMAX)

该文展示了一种应用于移动通信的新型的双端短路点平面倒F天线,该天线可实现多频且宽带工作。天线主要由主辐射带状天线、寄生天线和开槽地板构成。为了拓展在DCS/PCS/UMTS/LTE 2300/2500频段上的带宽,该天线采用了双短路点设计,该设计在1707~2815 MHz频段上实现多模工作。同时,由于充分利用寄生天线的高次谐振模,实现了对3387~3627 MHz的覆盖。经过加工测试,该天线在GSM/DCS/PCS/UMTS/LTE/802.11b/Wi-MAX频段上均展现了很好的阻抗匹配特性,并均能获得高于50%的辐射效率。

Design of Wide-Band PIFA (GSM 850 to WiMAX) for Mobile Handset

A novel planar inverted-F antenna (PIFA) with dual-shorting point is proposed for multiband mobile communication applications. The antenna comprises a main strip, a parasitic strip, and a slotted ground plane. For enhancing the bandwidth of DCS/PCS/UMTS and LTE 2 300/2 500, the antenna applies dual-shorting point design to generate multimode between 1 707~2815 MHz. The antenna upper band is formed by the higher-order resonant mode contributed by the parasitic strip and can cover the desired 3387~3627 MHz. The proposed antenna has good impedance matching characteristics for GSM (824~960 MHz)/DCS (1 710~1 880 MHz)/PCS (1 850~1 990 MHz)/UMTS (1 920~2 170 MHz)/LTE (2 300~2 400 MHz, 2 500~2 690 MHz)/802.11b (2.4~2.48 GHz) and Wi-MAX (3.4~3.6 GHz). The measured radiation efficiency of proposed antenna is higher than 52% in GSM 850/900, DCS/PCS, UMTS, LTE 2 300/2 500, and IEEE 802.11 b, and is up to 50% in Wi-MAX.