陳士元臺灣大學:電信工程學研究所汪秉孝Wang, Bing-HsiaoBing-HsiaoWang2010-07-012018-07-052010-07-012018-07-052008U0001-2207200814425800http://ntur.lib.ntu.edu.tw//handle/246246/188190本論文提出半波長槽孔陣列天線與四分之一波長槽孔陣列天線之寬頻設計。其中，槽孔天線單元均以微帶線偏移饋入，以獲得較大的阻抗頻寬，進而提升所組成陣列天線之頻寬。吾人設計之半波長槽孔陣列天線，在其寬頻阻抗頻寬內均能維持穩定的天線增益與輻射場形。此外，藉由截去接地面以形成準開路，可大幅縮小槽孔天線單元及其所組成陣列之面積，而其頻寬也可再提升。吾人設計之四分之一波長槽孔陣列天線，有大於半波長槽孔陣列天線之阻抗頻寬，且在頻帶內仍有不錯且穩定的增益與場形。為使槽孔陣列天線得以單向輻射，吾人使用一金屬平面做為反射板，以消除背向輻射、提升天線增益。上述槽孔陣列天線及其設計細節均於本論文中深入討論，並以模擬與量測結果相互印證。The broadband designs of half-wavelength slot array and quarter-wavelength slot array are proposed in this thesis. The slot elements are offset-fed by microstrip line to obtain the wider impedance bandwidth. Furthermore, the impedance bandwidth of the array antennas which composed of the slot elements can be wider. It can be kept stable that the radiation gain and the radiation pattern of the proposed half-wavelength slot array in the impedance band. Besides, it is formed a quasi-open circuit of the slotline by the truncated ground plane. The size of the slot element and the composed array can be compact, and the impedance bandwidth can be improved. Plane sheet is used as a reflector to make the slot array unidirectional radiation. The bandwidth of the proposed quarter-wavelength slot array is wider than the half-wavelength slot array. And it is also kept stable that the radiation gains and the radiation pattern. A plane sheet is used as a reflector which cancels the backed radiation and improves the radiation gain to make the slot array unidirectional radiation. The design details of the above slot array antennas are depth discussed in this thesis and are proved with the simulation and measurement results.口試委員審定書 i謝 iii文摘要 vbstract viiontents ixist of Figures xiist of Tables xivhapter 1.Introduction 1 1.1 Motivation and literature survey 1 1.2 Chapter outlines 3hapter 2.Analysis of Slot and Slot Array 5 2.1 Modes and characteristics of center-fed slot 5 2.2 Modes and characteristics of offset-fed slot 6 2.3 Array theory 7 2.4 Radiation pattern calculation with a back reflector 11hapter 3.Design of Broadband Half-Wavelength Slot Array Fed by Microstrip Line 21 3.1 Broadband half-wavelength slot array fed by microstrip line 21 3.2 Design of 10GHz 1x4 slot array fed by microstrip line 22 3.3 Design of 10GHz 2x2 slot array fed by microstrip line 23 3.4 Design of 10GHz 4x4 slot array fed by microstrip line 24 3.5 Design of 10GHz 4x4 slot array with a back reflector 25hapter 4.Design of Broadband Quarter-Wavelength Slot Array Fed by Microstrip Line 49 4.1 Broadband quarter-wavelength slot array fed by microstrip line 49 4.2 Design of 5.5GHz 14467709 bytesapplication/pdfen-US槽孔天線四分之一波槽孔槽孔陣列寬頻陣列反射板Slot antennasquarter-wavelength slotslot arraysbroadband arraysreflectorthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/188190/1/ntu-97-R95942062-1.pdf