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研究生:藍政惟
研究生(外文):CHeng-Wei Lan
論文名稱:多臂螺旋天線的分析與設計
論文名稱(外文):Analysis and Design of Multifilar Helical Antenna
指導教授:江簡富江簡富引用關係
指導教授(外文):Jean-Fu Kiang
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電信工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:50
中文關鍵詞:衛星通訊螺旋天線
外文關鍵詞:satellite commumicationbifilar helical antenna
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本論文使用週期性結構,帶狀螺旋模型和殼狀螺旋模型發展雙臂螺旋天線的設計公式.並使用模擬軟體求出各種參數對螺旋天線的影響.
利用此公式,設計一個適用於衛星個人通訊的雙臂螺旋天線.10dB的頻寬從1.1到2.0GHz,輻射場型滿足衛星通訊的使用.
Tape helix and sheath helix models are used to develop design rules for bifilar helical antenna(
BHA). Operational range of parameters are also organized to facilitate the design.
Design examples for dual-band GPS and satellite persional communication network are
demonstrated.
Shaped conical radiation patterns with 0 < G,max < 90 and 3 dB < gain < 20 dB
can be implemented by proper choice of , C , and N. The measured results show that the
bandwidth with 10 dB return loss is from 1 to 2 GHz. This BHA has good quality of circular
polarization when frequency is below 1.6 GHz.
Abstract i
Table of Contents iii
List of Figures viii
1 Introduction 1
2 Theoretical Analysis 5
2.1 k- Diagram of Periodic Structure . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Estimation Using k- Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Tape HelixModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Sheath Helix Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 BHA for GPS Applications 17
3.1 Antenna Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Rat-Race Hybrid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Resistive Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 Results and Discussions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4 BHA for Satellite Communications 28
4.1 Split-BeamBHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.2 Antenna Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3 Results and Discussions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5 Conclusions 43
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