本論文提出一種能雙頻應用於全球衛星定位系統之天線設計，利用平板堆疊結合方形平板截角達成所需的雙頻圓極化特性，完成的天線其雙頻分別操作在1227與1575 MHz，3 dB軸比定義的圓極化頻寬各為1.1%的15 MHz與1.2%的17 MHz，並且在頻寬內具有良好的圓極化輻射特性與良好的天線增益。

Design considerations and experimental results of a dual-band circularly polarized stacked microstrip antenna for GPS operations at 1227 and 1575 MHz are presented. The antenna is achieved by stacking two corner-truncated square microstrip patches. The obtained circular polarization (CP) bandwidths, determined from 3-dB axial ratio, are about 15 MHz (about 1.2%) and 17 MHz (about 1.1%) at 1227 and 1575 MHz, respectively. Good CP radiation patterns and antenna gain have also been observed.

文字目錄

文字目錄 i
圖形目錄 ii

第一章 序論 (Introduction) 1
1.1 研究動機 1
1.2 文獻導覽 1
1.3 論文提要 2

第二章 圓極化微帶天線設計原理 (Theory of CP Microstrip Antenna Design) 3
2.1 全球衛星定位系統簡介 3
2.2 圓極化輻射理論說明 4

第三章 適用雙頻全球衛星定位系統之微帶天線
(A Dual-band GPS Microstrip Antenna) 14
3.1 設計原理 15
3.2 模擬分析 16
3.3 實驗數據 25
3.4 心得討論 35

第四章 結論 (Conclusions) 36

參考文獻 (References) 37
論文著作表 (Publication List) 39

參考文獻
(References)

[1] K.L. Wong, Compact and Broadband Microstrip Antennas, Wiley, New York, 2002.
[2] K.L. Wong, Planar Antennas for Wireless Communications, Wiley, New York, 2003.
[3] K.P. Yang and K.L. Wong, “Dual-band circularly polarized square Microstrip antenna,” IEEE Trans. Antennas Propagat., Vol. 49, No. 3, pp. 377-382, Mar. 2001.
[4] K.B. Hsieh, M.H. Chen and K.L. Wong, “Single-feed dual-band circularly polarized Microstrip antenna,” IEE Electron. Lett., Vol. 34, No. 12, pp. 1170-1171, Jun. 11, 1998.
[5] J.Y. Jan and K.L. Wong, “A dual-band circularly polarized stacked elliptic Microstrip antenna,” Microwave Opt. Technol. Lett., Vol. 24, No. 5, Mar. 5, 2000.
[6] B. Balakrishnan and G. Kumar, “Dual band circularly polarized off-centered EMCP antennas,“ in 1998 IEEE Antennas Propagat. Soc. Int. Symp. Dig., pp. 316-319.
[7] D.M. Pozar and S.M. Duffy, “A dual-band circularly polarized aperture-coupled stacked microstrip antenna for global positioning satellite,” IEEE Trans. Antennas Propagat., Vol. 45, No. 11, pp. 1618-1625, Nov. 1997.
[8] F. Yang and Y. R.S., “A single layer dual band circularly polarized microstrip antenna for GPS applications,” in 2002 IEEE Antennas Propagat. Soc. Int. Symp. Dig., pp. 720-723.
[9] D.R. Jackson and N.G. Alexopoulos, “Simple approximate formulas for input resistance, bandwidth, and efficiency of a resonant rectangular patch,” IEEE Trans. Antennas Propagat., Vol. 39, No. 3, pp. 407-410, Mar. 1991.