臺灣博碩士論文加值系統

本篇論文主要是探討同軸電纜線轉接微帶線的傳輸特性，並加以改進。本論文第一個重點是將SMA接頭轉接微帶線上。由於SMA接頭的操作頻率只到18 GHz，在此藉由改變SMA接頭的結構，提升其在頻率18 GHz到30 GHz之間轉接時的傳輸特性。本論文第二個重點是將K接頭轉接微帶線上，由於K接頭其操作頻率到40 GHz，因此將探討各種參數對傳輸特性的影響，這些參數包括焊錫體積大小，焊錫位置和K接頭的擺放位置。本文中這些轉接的結構都是使用HFSS模擬軟體完成模擬，並實現出此改良的SMA接頭，且以25N和FR4基板製作出微帶線和微帶天線結構，並將量測結果與模擬值做比較。

This thesis mainly investigates and improves the transmission characteristics of coaxial-to-microstrip transitions. First, SMA connector-to-microstrip transitions are investigated. Though the operating frequency of SMA connector is only up to 18 GHz, by modifying the structure we will improve it from 18 GHz to 30 GHz. Second, the K connector-to-microstrip transitions are investigated. Because the operating frequency of K connector is up to 40 GHz, we will concentrate on the effects of many factors on the transmission characteristics such as the volume and the position of solder and the alignment of K connectors to microstrip lines. The structures of transition are first simulated by HFSS electromagnetic simulation software. Then, the improved SMA connectors are fabricated. Finally, microstrip lines and patch antennas are built on 25N and FR4 substrates for verification purpose. The measured results are compared to simulation results.

目錄

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…………………………………………………………………….x
表目錄…………………………………………………………………xvii
第一章 緒論……………………………………………………………1
1.1 概述……………………………………………………………1
1.2 研究動機與背景………………………………………………1
1.3 研究目的………………………………………………………2
1.4 章節內容說明…………………………………………………2
第二章 同軸電纜線轉接微帶線之簡介………………………………4
2.1 簡介……………………………………………………………4
2.2 同軸電纜線與微帶線的簡介………………………………....4
2.2.1 同軸電纜線特性的介紹………………………………….5
2.2.2 微帶線特性的介紹……………………………………….7
2.2.3 同軸電纜線到微帶線的轉接…………………………...10
2.3 同軸電纜接頭簡介…………………………………………..13
2.4 同軸電纜接頭簡介…………………………………………..15
第三章 SMA接頭簡介與改良方式…………………………………..25
3.1 簡介…………………………………………………………..25
3.2 SMA接頭結構對其傳輸特性的影響………………………25
3.2.1 SMA接頭長度的影響………………………………….27
3.2.2 SMA接頭中心導體訊號接腳長度的影響…………….28
3.2.3 SMA接頭中心導體訊號接腳形狀的影響…………….28
3.3 其他因素對SMA接頭傳輸特性的影響……………………29
3.3.1 銅質損失的影響……………………………………...…30
3.3.2 介質損失的影響………………………………………...30
3.3.3 輻射損失的影響………………………………………...32
3.4 改良的SMA接頭簡介………………………………………33
3.4.1 改良式SMA接頭簡介………………………………….34
3.4.2 改良式SMA接頭轉接微帶線的模擬結果討論…….....35
3.4.3 改良式SMA接頭轉接微帶線的量測結果討論…..…...37
3.5 改良式SMA接頭對微帶天線的影響………………………40
3.5.1 微帶天線簡介…………………………………………...40
3.5.2 改良式SMA接頭接上頻率較低的微帶天線….………42
3.5.3 改良式SMA接頭接上頻率較高的微帶天線………….44
3.6 討論…………………………………………………………..47
第四章 K接頭簡介與影響其傳輸特性因素的分析………………...79
4.1 簡介…………………………………………………………..79
4.2 K接頭與低溫共燒陶瓷轉接之簡介………………………..80
4.2.1 K接頭結構與特性分析………………………………...80
4.2.2 低溫共燒陶瓷簡介……………………………………...83
4.2.3 K接頭與低溫共燒陶瓷轉接時的特性分析…………...84
4.3 影響K接頭傳輸特性簡介…………………………………..86
4.3.1 焊錫對於K接頭的影響………………………………...87
4.3.2 K接頭其訊號接腳擺放位置對傳輸特性的影響……...89
4.4 K接頭轉接到微帶天線時的特性分析……………………..91
4.4.1 共振頻率與反射損耗的變化…………………………...92
4.4.2 增益與輻射場型的變化………………………………...94
4.5 討論…………………………………………………………..96
第五章 結論 ………………………………………………………...120
參考文獻……………………………………………………………….122

參考文獻

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