臺灣博碩士論文加值系統

本篇論文在探討應用R-Card做為改善行動電話對人體產生SAR之研究，其方式是利用Monopole天線手機的特性來探討對於不同阻抗值大小的R-Card、不同面積大小的R-Card、及R-Card遮蔽手機天線與非天線部位來做為研究比較的基礎條件。R-Card具有輕、薄、短、小，且易於導入手機內做降低SAR的對策，對於手機廠商降低手機SAR是非常好的選擇。只要導入適當阻抗值、適當遮蔽面積的R-Card 就可以降低手機的SAR，也可以維持住手機通訊品質，所以對手機設計商而言，這是對改善手機的SAR很好的對策。

This research utilizes R-Card to reduce SAR induced by the radiation from a handset. A monopole handset antenna is used here because its characteristics are well known, and can be used as a reference to justify the outcome of this study. Different R-Card configurations including variations in impedance profiles and sizes are applied to study the SAR reduction. The R-Card has several unique and favorable features, such as light weight, thin thickness, and small footprint. Further more; it is available in the market and therefore suitable for use on handset SAR reduction. As long as we use the appropriate impedance profile and the proper size R-Card to cover some part of the handset, the SAR will be reduced and the communication quality will be maintained as well. For the above reason, this is a very good solution to the handset designers to reduce handset’s SAR.

目 錄
中文摘要 i
英文摘要 ii
誌謝 iii
圖目錄 vii
表目錄 x
第一章 前言 1
1.1 研究背景 1
1.2 研究動機與目的 2
1.3 論文架構 3
第二章 SAR基本理論及量測設置 4
2.1簡介 4
2.2應用R-Card改善手機對人體的SAR 7
2.3以R-Card阻抗值作設定量測條件 10
2.4以R-Card貼附於手機特定部位作設定量測條件 11
2.5改善頭部SAR之手機天線防護 13
2.6在Free Space中R-Card對手機的天線效應 14
2.7在Head Phantom中R-Card對手機的天線效應 17
第三章 SAR之量測結果 21
3.1 SAR量測的設定 21
3.2以R-Card完全遮蔽手機的SAR量測結果 23
3.3以R-Card遮蔽手機天線的SAR量測結果 26
3.4以R-Card遮蔽手機非天線的SAR量測結果 29
3.5以R-Card當天線防護板的SAR量測結果 32
3.6量測SAR之結論 37
第四章 天線量測之結果 40
4.1 R-Card對手機Free Space狀態的天線量測結果 40
4.1.1 Idle Mode R-Card完全遮蔽手機的量測結果 42
4.1.2 Idle Mode R-Card遮蔽手機天線部分的量測結果 44
4.1.3 Idle Mode R-Card遮蔽手機非天線部分的量測結果 47
4.2 Free Space狀態的天線量測結論 50
4.3 R-Card對手機的Head Phantom狀態天線量測結果 52
4.3.1 Actual Mode R-Card完全遮蔽手機的量測結果 53
4.3.2 Actual Mode R-Card遮蔽手機天線部分的量測結果 57
4.3.3 Actual Mode R-Card遮蔽手機非天線部分的量測結果 60
4.4 Head Phantom狀態的天線量測結論 62
4.5 天線量測的結果分析與結論 64
第五章 結論與心得 70
參考文獻 74
作者個人簡歷 76

參 考 文 獻
[1]International Commission on Non-Ionizing Radiation
Protection, “Health Issues related to the Use of Hand-
held Radiotelephones and Base Transmitters,” Health
Phys., Vol. 70, pp. 587-593, 1996
[2]M. A. Mangoud, R. A. Abd-Alhameed, N. J. McEwan,
P.S.Excell, E. A. Abdulmula, “SAR Reduction for Handset
with Two-Element Phased Array Antenna Computed Using
Hybrid MoM/FDTD technique,” Electronic Letters, Vol.
35, No.20, pp. 1693-1694, Sept. 1999

[3]J. Wang, O. Fujiwara, “Reduction of Electromagnetic
Absorption in the Human Head for Portable Telephones by
a Ferrite Sheet Attachment,” IEICE Trans., Vol.E80-B,
NO.12, pp.1810-1815, DEC. 1997

[4]S. Handel, “Low Frequency Modification of a Dual hamber
Compact Range,” M.S. Thesis, The Ohio State University,
1997.

[5]ANSI/IEEE Std C95.1,IEEE Standard for Safety levels with
Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3KHz to 300GHz,1999 Edition.

[6]IEEE Std 1528-2003, IEEE Recommended Practice for
Determining the Peak Spatial- Average Specific
Absorption Rate (SAR) in the Human Head from Wireless
Communications Devices: Measurement Techniques, 2003
December.

[7]FCC OET Bulletin 65 Supplement C, Evaluating Compliance
with FCC Guidelines for Human Exposure to Radiofrequency
Electromagnetic Fields, 2001 June.

[8]European Standard CENELEC prEN50360/peEN50361, Product
standard to demonstrate the compliance of mobile
telephones with the basic restrictions related to human
exposure to electromagnetic fields(300MHz-3GHz),2000
June.

[9]APREL Laboratories, ALSAS 10-Universal SAR Measurement
System, http://www.aprel.com/alsas10u/index.html.

[10]吳大任，單偶及手機天線在有限防護板的輻射分析與相對之SAR
影響，元智大學，碩士論文，民國九十一年。