臺灣博碩士論文加值系統

本論文主要在於改善DVB-T及W-CDMA於UMPC上的天線空間效率，本文提出利用雙工器與一多頻共振天線，將DVB-T與W-CDMA兩大系統之兩天線整合為雙工單一天線的作法，此做法至少可於UMPC的天線空間上省掉W-CDMA或DVB-T兩系統之天線的其中一支天線空間且節省一支天線之成本，以位於UMPC 螢幕上方的W-CDMA天線為例，它的天線空間約須65x6.5x4mm以上，因此利用本論文之方案，將可為訴求輕巧及低價的UMPC帶來更有效的空間利用及成本下降。

The major topic of the thesis is advancing a novel method to combine the DVB-T and W-CDMA antennas system for reducing the space in UMPC (ultra mobile personal computer). Using a high frequency diplexer and a muti-band resonance antenna, it can integrate the DVB-T and W-CDMA system antennas into one antenna with little extra components. That is, the method save one of the DVB-T and W-CDMA system antenna and gain the benefit to drop the cost and the space in UMPC. For example, a W-CDMA antenna space is65x6.5x4mm and place on the top of the monitor of the UMPC. It is a half of the volume which uses two antennas system. Therefore, the goodness of the method provided by the thesis can increase the spaces utility rate of the space and down its cost.

中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 viii

第一章 緒論 - 1 -
1.1 研究動機與目的 - 1 -
1.2 數位電視廣播系統(DVB-T)簡介 - 4 -
1.3 WCDMA系統簡介 - 9 -
1.4 論文章節介紹 - 17 -
第二章 天線原理與概述 - 18 -
2.1 偶極及單極天線介紹 - 18 -
2.2 電壓駐波比(VSWR) - 24 -
2.3 天線輻射場型 - 26 -
2.4 天線極化 - 27 -
2.5 天線增益 - 27 -
2.6 天線幅射效率(Efficiency) - 28 -
第三章 DVB-T/W-CDMA天線與雙工器之設計及製作 - 29 -
3.1 雙工器(Duplexer)之設計 - 29 -
3.1.1 雙工器之模擬 - 31 -
3.1.2 雙工器製作 - 37 -
3.1.3 雙工器量測 - 40 -
3.2 天線之模擬 - 44 -
3.3 天線製作 - 48 -
第四章 天線之測試 - 51 -
4.1 電壓駐波比 (VSWR) - 51 -
4.2 天線史密斯圓圖 - 53 -
4.3 天線場形 - 54 -
4.4 天線增益 - 59 -
4.5 天線效率(Efficiency) - 61 -
4.6 天線特性之討論 - 62 -
4.7 隔離度測試 - 62 -
4.8 系統法規測試 - 65 -
4.9 整合系統實測之分析比較 - 70 -
第五章 結論 - 79 -
參考文獻 - 81 -

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