臺灣博碩士論文加值系統

近年來由於無線通訊科技的蓬勃發展，比吸收率（SAR：Specific Absorption Rate）已成為行動通訊與人體健康關係的重要議題，然而由於SAR量測系統幾乎都是使用E-probe進行量測SAR值，而E-probe經過一段時間的使用會慢慢的失去它的特性（精確度與準確性），由於國內無相關校正實驗室及校正製具，所以各實驗室所使用的E-Probe每年都需要送回原廠校正，曠日廢時，才能夠再次使用。有鑑於此，我們嘗試研究發展一套國內也能自行校正之系統，如此不僅節省時間、也省下了龐大的校正費用。
本論文在兩種情況下校正與查驗SAR測試探棒特性，第一種為在空氣中校正，另一種則在組織液中校正。首先必須先製作一個該頻段的波導管，而在短路端我們設計為可調式的裝置。在空氣中校正時，將E-Probe放置在波導開口端中央位置量測，紀錄量測到的電場值。而在組織液中校正時，波導管內部上端放置一Teflon容器，且Teflon容器的內部裝有模擬組織液，在校正時將E-Probe放置在模擬組織液體中，而且在Teflon容器正中央的位置，E-Probe由Teflon容器底部慢慢上升，計算且紀錄下由E-Probe所量測到的SAR值。在本研究中，我們將利用電磁數值模擬方法與實驗量測數值做比較，輔以模擬場強分佈，將以頻率900MHz與1800MHz各兩支波導管，加上Teflon與組織液，利用E-Probe與整組波導管作內部電場量測，並且使用兩支新舊探棒來量測作比較，針對數值方法來驗證我們所模擬以及量測結果的準確性，並提高量測可靠度。

In the recent years, （Specific Absorption Rate）SAR has become an important issue concerning health hazard due to the rising usage of wireless communication technologies. The measurement system mostly used the E-Probe to measure the SAR values. However the E-Probe offer extended usage will gradually degrade in term of precision and accuracy. Since, to date, there exists no Laboratories in this country to perform the calibration, it would be of interest to design such a calibration scheme. The implementation of the local calibration will not only save time but also the huge expenses of sending the E-Probe to the original manufacturer for recalibration.
In this thesis, to design of system for the calibration of SAR probe is carried not under two environments, namely, in air and tissue. A waveguide operating in the desired calibration frequency was designed. The fabricated waveguide was constructed with an adjustable short-circuited termination. For the calibration in air, the E-Probe was placed in the center of the waveguide aperture and gradually extended inwardly. To record the measured SAR values. However, when calibrating in the tissue equivalent-liquid, a Teflon container filled with the tissue equivalent liquid was placed on the top of the interior of the waveguide. The E-Probe was then positioned in the center of the Teflon container and raises the E-Probe from the bottom of the container slowly. In this study, we have utilized electromagnetic numerical simulation method to compare the measurement values to verify the accuracy of the result. We focused on the analysis and comparison related to the E-field distribution at 900MHz and 1800MHz.

目錄
封面內頁
簽名頁
授權書．．．．．．．．．．．．．．．．．．．．．．．．．iii
中文摘要．．．．．．．．．．．．．．．．．．．．．．．．iv
英文摘要．．．．．．．．．．．．．．．．．．．．．．．．v
誌謝．．．．．．．．．．．．．．．．．．．．．．．．．．vi
目錄．．．．．．．．．．．．．．．．．．．．．．．．．．vii
圖目錄．．．．．．．．．．．．．．．．．．．．．．．．．ix
表目錄．．．．．．．．．．．．．．．．．．．．．．．．．xii
第一章　緒論．．．．．．．．．．．．．．．．．．．．．．1
1.1 前言．．．．．．．．．．．．．．．．．．．．1
1.2 研究動機及方法．．．．．．．．．．．．．．．2
1.3 論文架構．．．．．．．．．．．．．．．．．4
第二章　基本波導理論．．．．．．．．．．．．．．．．．．5
2.1 簡介．．．．．．．．．．．．．．．．．．．．5
2.2 沿著均勻波導管傳播的一般波動特性．．．．．．6
2.2.1 橫向電磁波．．．．．．．．．．．．．．11
2.2.2 橫向電波．．．．．．．．．．．．．．．13
2.2.3 橫向磁波．．．．．．．．．．．．．．．17
2.3 矩形波導管．．．．．．．．．．．．．．．．．23
2.3.1 矩形波導管內之TM波．．．．．．．．．．23
2.3.2 矩形波導管內之TE波．．．．．．．．．．27
2.3.3 矩形波導管之衰減．．．．．．．．．．．34
第三章 人體電磁波能量吸收率概論．．．．．．．．．．．．38
3.1 人體電磁波能量吸收率（SAR）簡介．．．．．．38
3.2 SAR量測系統．．．．．．．．．．．．．．．．42
3.3 SAR量測要求．．．．．．．．．．．．．．．．43
第四章 SAR測試探棒特性之模擬與實測．．．．．．．．．．47
4.1 Open-ended 波導管製作．．．．．．．．．．．．49
4.1.1 波導管設計架構與原理．．．．．．．．．49
4.1.2 波導管的實體與模擬尺寸．．．．．．．．50
4.2 900MHz及1800MHz波導管的實測與模擬．．．．54
4.2.1 900MHz波導管的實測與模擬．．．．．．．54
4.2.2 1800MHz波導管的實測與模擬．．．．．．56
4.3 SAR-Probe之特性校正分析．．．．．．．．．．57
4.3.1 SAR-Probe在自由空間中之校正．．．．．58
4.3.2 SAR-Probe在組織液中之校正．．．．．．63
第五章 結論．．．．．．．．．．．．．．．．．．．．．．74
參考文獻．．．．．．．．．．．．．．．．．．．．．．．．78
附錄．．．．．．．．．．．．．．．．．．．．．．．．．．79

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