國立臺灣大學電信工程學研究所林怡成2006-07-262018-07-052006-07-262018-07-052004-07-31http://ntur.lib.ntu.edu.tw//handle/246246/20298本計畫已成功地研發一雙頻圓極化介質共振天線(DRA)。吾人採用橢圓型介質共振天 線來設計一個雙頻的天線，並使用同軸傳輸線來作饋入設計。本文中所設計的雙頻共振天 線為同模雙頻天線，即是頻率不同但輻射場形一致的雙頻天線。在本論文中天線輻射模態 選擇HEM11δ模態來作為兩個不同頻段的首位模態。HEM11δ模態其遠場輻射場形在天線正上方 為一個對稱性的圓弧，此可等效成一個magnetic dipole在橢圓軸心輻射的結果。本報告包 括設計、模擬、實作、及量測之結果。The project has successfully completed the design and implementation of a dual band circularly polarized dielectric resonator antenna (DRA). An elliptical dielectric resonator is employed to realize the dual band design with co-axial probe feed. The dual ports is arranged orthogonally and generate the same HEM11δmode that leads to the same radiation pattern with peak gain on the broad sight. Such a mode can be considered as the equivalent magnetic dipole above the ground plane perpendicular to the port axis. This report covers the design, simulation, prototype, and measurement results.application/pdf638727 bytesapplication/pdfzh-TW國立臺灣大學電信工程學研究所介質共振天線雙頻天線圓形極化Dielectric Resonator AntennasDual Band AntennasCircularly Polarized Antennasreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/20298/1/922218E002033.pdf