臺灣博碩士論文加值系統

雙角錐天線早在1941年時就被 S. A. Schelkunoff 提出來進行分析，之後又有 P. D. Smith 、 C. H. Papas 以及 R. King做更近一步的改進與延伸，因此對於分析雙角錐天線的方法有很多種。本論文將針對使用於VHF低頻段(100MHz左右)以下之極高功率脈衝輻射源的天線進行設計的研究與分析。將採用理論模型分析以及數值方法分析寬頻雙角錐天線，推導其結構相關參數對天線特性影響的理論模型，以便作為將來修正高功率發射天線的場型分佈與效率。在論文中也利用了HFSS模擬軟體來探討雙角錐天線的一些特性，分別針對雙角錐的長度、電線厚度、電線數量以及張角角度來進行模擬，目標即是設計出高功率輻射所適用的天線結構。

The study on the input impedance of biconical antennas was first reported by Schelkunoff in 1941. Then more improvement and extension were accomplished by P. D. Smith, C. H. Papas and P. king. There are many solutions available to solve this type of problems. In this thesis, we design and study biconical antennas under VHF (about 100MHz). In order to correct the distribution of radiation pattern and the efficiency of high-power pulse antenna. It will use mode analysis of the theory and numerical methods to analysis wide-band biconical antenna and then drive the relative parameter to this structure for affecting antenna characteristic of the mode analysis. In this thesis, for designing suitable structure of the high-power antenna, we also use simulation software, called HFSS, to discuss some characteristic of biconical antenna by changing the length of biconical antenna, thickness and number of wire, and the angle of conical.

目 錄

中文摘要………………………………………………………………..i
英文摘要………………………………………………………………..ii
誌謝…………………………………………………………………..iii
目錄……………………………………………………………………..iv
圖目錄…………………………………………………………………..vi

第一章 緒論…………………………………………………... 1
1-1 天線簡介……………………………………………... 1
1-2 研究動機……………………………………………... 6
1-3 論文架構……………………………………………... 6

第二章 理論分析……………………………………………... 7
2-1. 理論模型分析………………………………………. 7
2-2 的估算……………………………………………...13
2-3 寬角近似分析法 …………………………………… 16
2-3-1. 小型角錐近似法……………………………… 20
2-3-2 大型角錐近似法……………………………… 23
2-4 参考文獻之設計案例分析…………………………. 28
2-5 脈波幅射之特性研究……………………………… 29

第三章 高功率寬頻脈波天線之設計…………………………… 32

第四章 寬頻雙錐形天線之量測…………............... 42
4-1 前言……………………………………………… 42
4-2 雙錐型天線實體模型…………………………….. 44
4-3 量測結果...…...…………………………………. 47
4-4 討論……………………………………………… 48

第五章 結論………………………………………………... 49

參考文獻………………………………………………………….. 50

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