以一新穎之槽孔結構耦合圓形極化環形天線

CIRCULARLY POLARIZED RING ANTENNA COUPLED BY A NOVEL SLOT CONFIGURATION

陳彥均(Yen-Chun Chen)

指導教授 ： 張知難

大同大學/電機資訊學院/通訊工程研究所/碩士(2011年)

摘要

天線由微帶線跨越一獨特設計的槽孔，槽孔的結構包含一矩形環狀槽及四條向中心內延伸的分支槽而成，並由一環形貼片做耦合，而在經由調整槽孔的長度可達成寬的軸比，可操作於WiMAX(2.3GHz~2.4GHz,2.5GHz~2.7GHz)頻段。
概括來說，天線在10dB的阻抗頻寬為24%(2.25GHz~2.86GHz)，3-dB的軸向比頻寬16%(2.29GHz~2.7GHz)，而天線的增益6dBic以上操作頻率範圍為
(2.33GHz~2.67GHz)。

關鍵字

圓極化 ； 微帶天線

並列摘要

An aperture-coupled ring antenna is studied in this thesis. The antenna is coupled by a microstrip line through a uniquely designed slot configuration. The slot configuration contains a rectangular slot ring with four short branch slots protruding toward the center of the ring. By adjusting the slot length of the patch antenna, a wide axial-ratio bandwidth can be achieved.
In summary, the antenna has a 10dB impedance bandwidth of 24% (2.25GHz ~ 2.86GHz), 3-dB axial ratio bandwidth of 16% (2.29GHz ~ 2.7GHz) and a gain of 6dBic from 2.33GHz to 2.67GHz.

並列關鍵字

WiMAX

參考文獻

[1] H. Kim, B. M. Lee and Y. J. Yoon,” A single-feeding circularly polarized microstrip antenna with the effect of hybrid feeding,”IEEE Antenna Wireless Propagat. Lett., vol.2, pp.74-77, 2003.

[2] E. Aloni and R. Kastner, “Analysis of a dual circular polarized microstrip antenna fed by crossed slots,” IEEE Trans. Antennas Propagat., vol. 42, pp.1053-1058, Aug. 1994.

[3] T. Vlasits, E. Korolkiewicz, A. Sambell, and B. Robinson, “Performance of a cross-aperture coupled single feed circular polarized patch antenna,” Electron. Lett., vol. 32, no.7, pp.612-613, Mar. 1996.

“Transmission-line modeling of the cross-aperture-coupled circular polarized microstrip antenna,” Microwaves, Antennas Propagat. Proc. Inst. Elect. Eng.,

[5] H. F. Puse and A. R.V. D. Capelle,” An Impedance-Matching Technique for Increasing the Bandwidth of Microstrip Antennas,” IEEE Transactions Antennas Propagate., vol. 37, no.11, pp.1345-1354, Nov. 1989.