鄭士康臺灣大學：電信工程學研究所謝玉軒Hsieh, Yu-HsuanYu-HsuanHsieh2007-11-272018-07-052007-11-272018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/58590近年來，平面天線在微波系統裡面的應用相當的多。本論文的研究目標在設計利用電感式與電容式共平面波導饋入三凹槽寬頻天線。 首先對傳統單一凹槽天線做模擬，藉由模擬的結果，了解相關參數在電感式與電容式共平面波導饋入時，對頻寬上的影響。再設計三凹槽天線，利用凹槽長度去控制不同的共振頻率，並使彼此的頻寬可以加成以達到寬頻的效果。本論文中，將所設計的三凹槽天線設計在三個不同頻段；此天線能在2.4GHz有40%的頻寬，在7GHz能有32%左右的頻寬，而在60GHz也能有20%的頻寬。而高頻上的場型分布，則顯示出用電容式共平面波導饋入能降低交叉極化的現象。三頻段之天線均已實作完成，除60GHz天線限於材料及量測設備，量測結果較不完整外，2.4GHz及7GHz之天線實際量測與模擬相當符合。Abstract Recently, planar antennas have been used in many applications in microwave and millimeter-wave systems. In this dissertation, we focus on the 3 slot antenna fed by coplanar waveguide (CPW). First of all, a single slot antenna is simulated. Based on the simulation results, we observed that the dimension of slot is the most significant parameter affecting bandwidth when fed by inductive and capacitive CPW. From this, we designed a 3-slot antenna with different slot dimensions such that the bandwidth can be extended. In this thesis, the 3-slot antennas are designed for 3 different bands. The antennas achieve 40% bandwidth at the centered frequency 2.4 GHz, 32% bandwidth at 7 GHz, and 20% bandwidth at 60 GHz. The pattern distributions at high frequency verify that the capacitive CPW can lower cross-polarization. The antennas of three different bands have been fabricated. The measured results of the 2.4 GHz and 7 GHz antennas agree well with the simulated ones. The measured results of the 60 GHz antennas are not completed due to the material of the laminate and measurement equipments.第一章 緒論 1 1-1 動機與文獻回顧．．．．．．．．．．．．．．．．1 1-2 章節概要．．．．．．．．．．．．．．．．．．．3 第二章 基本理論 4 2-1 共平面波導的輸入阻抗匹配．．．．．．．．．．．4 2-2 單一凹槽天線的基本理論．．．．．．．．．．．．5 2-2-1 電感式共平面波導饋入單一凹槽天線基本理論．．．．5 2-2-2 電容式共平面波導饋入單一凹槽天線基本理論．．．．7 2-3 三凹槽天線的基本理論．．．．．．．．．．．．13 2-3-1 電感式共平面波導饋入三凹槽天線基本理論．．．．．13 2-3-2 電容式共平面波導饋入三凹槽天線基本理論．．．．．24 第三章 2.4 GHz 三凹槽天線的設計 30 3-1 2.4 GHz電感式三凹槽天線．．．．．．．．．．30 3-2 2.4 GHz電容式三凹槽天線．．．．．．．．．．41 第四章 7 GHz 三凹槽天線的設計 55 4-1 7 GHz電感式三凹槽天線．．．．．．．．．．．55 4-2 7 GHz電容式三凹槽天線．．．．．．．．．．．60 第五章 60 GHz 凹槽天線的設計 69 5-1 60 GHz電感式三凹槽天線 ．．．．．．．．．．69 5-2 60 GHz電容式三凹槽天線 ．．．．．．．．．．77 5-3 60GHz三凹槽天線的實作與量測 ．．．．．．．85 第六章 結論 90 參考文獻 922667645 bytesapplication/pdfen-US凹槽天線共平面波導寬頻CPW-Fedbroadbandslot antennathesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58590/1/ntu-93-R91942050-1.pdf