臺灣博碩士論文加值系統

本論文提出多頻寬頻天線應用於無線通訊產品之研究。近年來無線通訊產品蓬勃發展，市面上產品皆在追尋「輕、薄、美觀」等特點，美觀部分通常利用全金屬的外殼來設計天線，進而增加美感與質感。本論文天線主要利用非對稱槽孔天線(slot Antenna)設計在全金屬的環境，並設計兩支天線在4G(Long TermEvolution,LTE)的工作頻段。本文槽孔天線設計方式從原始中間饋入改為距離一邊長度為λ/20的位置饋入，能使天線阻抗能與饋入線匹配，再利用多路徑來達到多頻寬頻效果，並使兩支天線隔離度達-13dB以下。

This paper proposes the application of multi-band wideband antennas to wireless communication products. In recent years the rapid development of wireless communication products, it is well known that wireless communications products must have light, thin, beautiful features. The appearance part usually uses the whole metal shell to design the antenna, increase the sense of beauty and texture. This thesis mainly uses asymmetric slot antenna to design the whole metal environment, and designs two antennas in 4G (Long term evolution, LTE) frequency band. In this paper, the slot antenna design is changed from the original intermediate feed to the position feed with a side length of λ/20. Multi-path and slot-path to achieve multi-band broadband effect, And the antenna isolation of the two antennas is below -13dB.

目錄
第一章 緒論 1
1.1 研究動機與目的 1
1.2 無線通訊使用頻段規格 2
1.3 相關文獻 3
1.4 內容大綱 4
第二章 天線設計之相關基本原理與特性 5
2.1 槽孔天線原理 5
2.2 共平面波導結構 8
2.3 分集天線概述與類別 9
2.4 天線的頻寬 14
2.5 天線隔離度 Isolation 15
第三章 多頻寬頻槽孔天線之分析 16
3.1 簡介 16
3.2 槽孔天線設計模擬 16
3.2.1 低頻槽孔天線設計模擬 16
3.2.1.1 槽孔長度變化對頻率之影響 20
3.2.1.2 槽孔天線與板邊距離分析 21
3.3 高頻槽孔天線設計 22
3.4 多頻寬頻槽孔天線 26
3.4.1 多頻寬頻天線線寬分析 35
3.5 隔離度分析 38
3.5.1 離度對擺放的位置之影響 38
第四章 應用於金屬外殼之寬頻及多頻非對稱槽孔天線 41
4.1 簡介 41
4.2 天線架構 41
4.3 多頻寬頻天線模擬結果 43
4.4 實作結果分析 45
第五章 結論 55
參考文獻 56

 

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