臺灣博碩士論文加值系統

近年來，全球通信市場蓬勃發展，微波電路技術已經被廣範地應在於各式各樣的通訊系統中。由於微波電路組成RF放大器、濾波器、混波器及振盪器的基本要素，因此在通訊系統中，微波電路扮演著舉足輕重的角色。在微波電路中，以微帶線為最基本的傳輸線結構。由於微帶型傳輸線具有結構簡單、製造成本低廉、適用於印刷電路技術等優越特性。因此本論文即採用微帶線設計帶通濾波器。
此一帶通濾波器是用耦合原理，在配合平行耦合（Parallel Coupled）式結構製造而成，且提出數種改善二倍中心頻率響應過大的方法。本論文均以實例進行設計與製作，並將所得結果相互比較。此研究所獲得之經驗，可供日後設計微帶線濾波器之依據。

Recently, because of the booming of global communication market, RF circuits have been applied in many of the communication systems such as IEEE 802.11G, Bluetooth, and GSM. Furthermore, RF circuits and some system components like RF Amplifier, Filter, Mixer, and Oscillator compose most of the fundamental elements of the communication systems. Thus, the RF circuit technologies play an important role in the development of the communication systems.
Considering the RF circuit technologies, the micro-strip line is the basic and popular transmission line because of its simple architecture, cost effective, and easy to apply in the print circuit technology. Therefore, we chose the micro-strip line to design the band pass filter and the thesis is written for improving the filter characteristic.
The design of the band pass filter is based on the coupling theory of the parallel-coupled microstrip line structure. In the following chapters, methods for reducing the second pass band response were proposed. All e examples in the thesis were performed in real circuits and circuit tested data were compared with the related simulation results and related theories.

中文摘要………………………………………………………………..Ⅰ
英文摘要………………………………………………………………..Ⅱ
致謝……………………………………………………………………..Ⅲ
目錄……………………………………………………………………..Ⅳ
圖表索引………………………………………………………………..Ⅶ
第一章緒論……………………………………………………………..1
1.1 研究動機與目的………………………………………………..1
1.2 論文架構………………………………………………………..2
第二章濾波器基本理論………………………………………………..3
2.1 基本型式………………………………………………………..3
2.2 響應特性………………………………………………………..6
2.3 數學模式………………………………………………………..7
2.3.1巴特渥斯低通濾波器……………………………………..9
2.3.2柴比雪夫低通濾波器……………………………………11
2.3.3低通濾波器轉帶通濾波器………………………………16
第三章微帶線濾波器…………………………………………………19
3.1 微帶線基本特性………………………………………………19
3.1.1結構………………………………………………………19
3.1.2 特性……………………………………………………..20
3.1.3 平行耦合微帶線的種類………………………………..21
3.2微帶線濾波器的種類…………………………………………..22
3.3微帶線濾波器設計之相關數學模型…………………………..24
3.3.1傳輸矩陣(ABCD) ………………………...……………..24
3.3.2影像參數法………………………...………………….....26
3.3.3 Richard’s 轉換式………………...…………………...…30
3.3.4 Kuroda’s 特性………………...…………………...…….31
3.3.5 阻抗與導納反向器…………...…………………...……32
第四章平行耦合式微帶線濾波器…………...…………………...…..34
4.1平行耦合式微帶線濾波器的基本原理…………………...…..34
4.1.1特性…………...…………………...……………………..34
4.1.2平行耦合微帶線帶通濾波器的設計原理………………40
4.2 平行耦合式微帶線帶通濾波器之設計與製作方法…………47
4.3實例應用...…………………...…………………………………49
第五章平行耦合式微帶線濾波器的改良……………………………55
5.1 延長奇數模式長度法…………………………………………56
5.1.1耦合微帶線理論與延長奇數模式長度…………………56
5.1.2 實驗結果………………………………………………..60
5.2 介質板覆蓋法………………………………………………....63
5.3接地面開孔法………………………………………………..…66
5.4 電容補償法………………………………………………..…..68
5.5 各法比較………………………………………………..……..71
第六章結論………………………………………………..…………..73
參考文獻………………………………………………..………..……..74
附錄………………………………………………..……………..……..76
附錄A ABCD 矩陣參數與S、Z及Y參數之間的轉換表..……..…..77
附錄B 串聯與並聯共振器..……..…………………………………….78

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