槽孔耦合多頻帶手機天線

Abstract

本論文提出一個應用於手機的槽孔天線設計。天線為在接地面上挖兩個L形的槽孔及一個寄生元件所組成。經由適當的設計，兩個L形的槽孔可由耦合效應激發所需的操作頻帶。另外，寄生元件可由接地面上的槽孔經電磁耦合效應下，激發出WLAN頻帶。因此，三個輻射元件可以各別激發出三個共振模態，中心頻率分別為900MHz，2100MHz，5200MHz，涵蓋的頻段為GSM/DCS/PCS/UMTS/Bluetooth/WiMAX/WLAN。而天線為簡單的平面架構，所占面積為35×22mm2，且所操作的三個頻帶的輻射特性良好。本天線的設計細節及實驗結果在論文中有詳細討論。

A novel internal multiband slot antenna for mobile phone applications is presented. The antenna consists of two L-shaped slots of different lengths cut at the edge of the system ground and added a parasitic strip. It is shown that with a proper design, the two L-shaped slots can generate the operating bandwidths by coupling effect. And the parasitic strip is electromagnetically coupled and excited by the slot to generate the WLAN band. Hence, three elements can separately control the operating frequencies of the three excited resonant modes, which generate the three bands centered at about 900, 2100 and 5200 MHz to cover the GSM/DCS/PCS/UMTS/Bluetooth/WiMAX/WLAN bands. Furthermore, the antenna has a simple planar structure and occupies a small area of 35×22mm2. Good radiation characteristics are obtained over the three operating bands. The design details for the proposed antenna are described, and the experimental results of the antenna performances are presented and discussed.