利用循序旋轉技巧設計共面波導饋入之圓極化陣列天線

Design of CPW-Fed Circularly Polarized Patch Arrays Utilizing Sequential Rotation Technique

蘇哲穎(Che-Ying Su)

指導教授 ： 許博文

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.00004

摘要

微帶天線在現代的通訊系統應用中扮演著非常重要的角色。然而我們都知道,微帶天線受到窄頻寬和極化程度的限制。
在本論文中,為了改進頻寬和極化程度,我們提出了一結合T形饋入線和循序旋轉技巧的共面波導饋入之圓極化陣列天線。
我們實現了使用循序旋轉和未使用循序旋轉的1×2和2×2陣列天線。從模擬與量測的結果當中,我們可以看到使用循序旋轉技巧的1×2和2×2陣列天線,在頻寬上有很明顯的提升。

關鍵字

天線 ； 共面波導 ； 循序旋轉 ； 圓極化

並列摘要

Microstrip patch antennas play an important role in wide application in modern communication systems. However, it is well known that microstrip antennas are limited in bandwidth and polarization purity.
In this thesis, in order to increase the bandwidth and polarization purity, a wide bandwidth CPW-fed circularly polarized patch array is proposed by combining the T-shaped feeding structure and the principle of sequential rotation technique.
The simulated and measured axial ratios, return losses
, and radiation patterns are presented for 1×2 and 2×2 arrays with and without sequential rotation. Significant increases in the axial ratio and return loss bandwidths are found in the array with sequential rotation.

並列關鍵字

array ； CPW ； patch ； circularly polarized ； sequential rotation

參考文獻

National Taiwan University, 2001.

[1] S. Yano and A. Ishimaru, “A theoretical study of the input impedance of a circular microstrip disk antenna,” IEEE Trans. Antennas Propogat., vol. 29, no. 1, pp. 77-

83, Jan. 1981.

[2] C. Baumer, “Analysis of slot coupled circular microstrip patch antenna,” Electron.

[4] T. Teshirogi, M. Tanaka, and W. Chujo, “Wideband circularly polarized array