利用修正環形槽孔環產生雙頻圓形極化天線

DUAL-BAND CIRCULARLY POLARIZED ANTENNA USING MODIFIED ANNULAR SLOT-RING

周文章(Wen-chang Chou)

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

本論文提出了一種雙頻帶圓形極化天線。該天線是由微帶線饋入，在一接地層置入一個圓形環對接地層做微擾。被修改的擾動環是從一個圓形環嵌入兩個扇形殘段並放在兩個不同的位置。在研究中只有一個扇形殘段就可以生成兩個窄頻頻帶，在這種情況下，加載兩個扇形殘段時可以提高兩個圓形極化頻帶的頻寬，所取得的圓形極化中心頻在2.4GHz頻寬為8％和中心頻在5.4GHz頻寬為20％。

關鍵字

圓形極化 ； 雙頻天線

並列摘要

This thesis presents a dual-band circularly polarized antenna. The antenna is fed by a microstripline and is composed of a circular slot loaded with a perturbed ring on the ground place. The perturbed ring is modified from a circular ring by embedding two fan-shaped stubs at two different positions. It has been studied that loading only one fan-shaped stub can also generate two cp bands which are narrow in this case . Loading two fan-shaped stubs can enhanced the cp bandwidth of both bands, and the achieved cp bandwidth is 8% centered at 2.4GHz and 20% centered at 5.4GHz.

並列關鍵字

cp ； slot antenna ； dual band

參考文獻

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[3] J. Liang, C. C. Chiau, X. Chen, and C. G. Parini, “Printed circular disc monopole antenna for ultra-wideband applications,” Electronics Letters, vol. 40, no. 20, pp. 1246-1247, Sep. 2004.

[5] T. Lee, J. Jung, H. Lee, Y. Lim ,”Modified Annular Ring Slot Antenna for Dual WLAN Band application,” Microwave and Millimeter Wave Technology,vol. 1, pp. 410-412 , Jun. 2008.

[1] 葉璟霈，共平面波導饋入式圓極化環形單極天線之研製，國立中央大學，電機工程研究所，2010年.

[4] 吳勇楠，以頻帶抑制技術實現WiMax雙橢圓槽孔天線，國立台南大學，通訊工程研究所，2009年.