臺灣博碩士論文加值系統

本篇論文主要是利用電磁波的觀念，將原本大體積的矩型共振器改良成曲折式的矩形同軸共振器，利用這樣的改良方式可以得到一個輕巧且小體積的共振器，並且討論幾種不同的共振體，配合不同的共振技術來做一個比較：1. 微帶線到矩形共振器的耦合2. 微帶線到微帶饋入線間的間隙耦合3. 介質共振體和微帶線間的耦合。在本論文中的模擬所設定的共振頻率為5 GHz，基板原本是用矽材料、微帶線則為銅來模擬，但是後來發現其損耗太大所以基板改採用MgO的材料、微帶線則為高溫超導薄膜(YBaCuO)來模擬，優點為較容易看出各個共振器的特性，缺點是如果要將此共振器實現化將會花費相當多的成本，所以本論文只有利用簡單的FR4板子做出成品，並將測量結果和模擬值做一個比較。

The concept of electromagnetic wave was used to improve a planar rectangular resonator to a meander planar coaxial rectangular resonator. Thus, the size of the resonator can be reduced while still achieving high Q factor. We also compare the characteristics of this resonator to the following common resonators: 1. the microstripline-fed planar rectangular resonator, 2. the gap-coupled half-wavelength microstripline resonator; 3. the parallel quarter-wavelength microstripline resonator and 4. the microstripline-fed dielectric resonator. In this thesis, the resonant frequency is chosen to be 5 GHz. Originally, silicon substrate and copper microstriplines were used in the simulation. However, we found that the loss was too high. Therefore, high temperature superconducting thin-film microstripline and MgO substrates were used in later simulation. It is difficult and costly to fabricate the resonator using these materials. Only a simplified version built by FR4 substrate was fabricated and measured to compare with simulation results.

指導教授推薦書……………………………………………………..
口試委員會審定書…………………………………………………..
授權書……………………………………………………………….. iii
誌謝………………………………………………………………….. iv
中文摘要…………………………………………………………….. v
英文摘要…………………………………………………………….. vi
目錄………………………………………………………………….. vii
圖目錄……………………………………………………………….. xi
表目錄……………………………………………………………….. xvii
第一章 簡介………………………………………………………… 1
1.1 概述…………………………………………………………... 1
1.2 動機…………………………………………………………... 3
1.3 章節內容說明………………………………………………... 4
第二章 矩形空腔共振器的設計………………………………….... 6 2.1共振電路相關理論介紹…………………………………….. 6
2.1.1品質因數………………………………………………. 6
2.1.2共振電路的耦合方法…………………………………. 8
2.2矩形空腔共振器的設計及共振頻率……………………….. 9
2.3矩形空腔共振器的架構……………………………………. 10
2.4計算無載Q值……………………………………………… 12
2.5結果討論…………………………………………………… 16
第三章 矩形空腔共振器的改良方式…………………………….. 21
3.1改進的設計方法及原理……………………………………. 21
3.2共振器體積和反射損耗、Q值的關係…………………… 23
3.3利用曲折方式的架構減少共振器的面積…………………. 25
3.4利用高溫超導(YBCO)取代金屬…………………………... 27
3.5截角長度、彎角多寡的影響………………………………. 29
3.6相關設計參數的影響分析…………………………………. 31
3.6.1導体高度h1的影響……………………………………. 31
3.6.2空腔厚度h的影響…………………………………….. 33
3.6.3孔槽長度L3的影響…………………………………… 34
3.7各設計參數對於共振器的關連性…………………………. 35
3.8實做及測量…………………………………………………. 36
3.9結果討論……………………………………………………. 38
第四章 其它共振器的介紹及比較……………………………….. 54
4.1目的………………………………………………………… 54
4.2介質共振器簡介…………………………………………… 54
4.2.1利用孔槽耦合的設計………..………………………. 55
4.2.2共振器高度H、半徑R的影響……………………... 56
4.2.3孔槽大小對Q值、反射損耗的影響………………… 57
4.3半波長微帶線共振器介紹…………………………………. 57
4.4四分之一波長的微帶線共振電路…………………………. 60
4.5結果討論……………………………………………………. 61
第五章 結論……………………………………………………….. 69
參考文獻………………………………………….…………………. 70

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