- 學位論文
利用地的不完整性來達到小型化四頻手機天線
A Compact Quad-Band PIFA by Tuning the Defected Ground Structure for Mobile Handsets
摘要
近年來無線通訊市場的急速蓬勃發展，相形之下小型化天線的發展也漸漸的扮演著極俱重要的角色。這篇論文主要的目的在提出一個新的設計想法，來建構一個俱有隱藏性、且兼俱小型化特性的四頻手機天線。然而其頻帶含蓋範圍從GSM-900(Global System for Mobil Communication,全球行動通訊系統,頻帶:880~960 MHz)、DCS-1800(Digital communication system,數位通訊系統,頻帶:1710~1880 MHz)、PCS-1900(Personal Communication Services,個人通訊服務系統,頻帶:1850~1990 MHz)、IMT-2000(Integration of Mobile and Fixed Network,行動通訊與固網整合系統,頻帶:1920~2170 MHz)。 在這篇論文所提出的小型化四頻手機天線，其體積僅需 。並利用一個新的技術來改善小型化倒F平面天線所帶來的窄頻困擾，因此而能有效的拉大頻寬。在本論文所提到新的技術便是利用兩個置於天線-地的開放式槽孔來激發新的模態並達到缺陷性接地架構設計，進而滿足DCS-1800、PCS-1900、IMT-2000所需的使用頻帶，然而其槽孔位置幾乎置於天線輻射體的下方，故能有效的降低天線體積，這種利用地的不完整性來激發新模態的方法相信對於現今的市場需求會有著非常大的貢獻。
並列摘要
The development of compact antennas plays an important role in rapidly growing mobile communication market, recently. This paper presents a novel design technique of the quad-band small internal antenna which covers GSM-900(Global System for Mobil Communication,bandwidth:880~960 MHz)、DCS-1800(Digital communication system,bandwidth:1710~1880 MHz)、 PCS-1900(Personal Communication Services,bandwidth:1850~1990 MHz)、IMT-2000(Integration of Mobile and Fixed Network,bandwidth:1920~2170 MHz). The handset antenna is developed within the limits of a volume. This proposed antenna describes a new idea of increasing operational bandwidth for the compact planar inverted F antenna (PIFA). The proposed idea introduces the open-end slots in the ground plane to excitation new mode for increasing operational bandwidth. The propose method with defect ground structure (DGS). The open-end slots almost all under the radiating patch. The size reduction method is attractive from the point of view of practical antenna implementation.