超寬頻天線設計與量測

DESIGN AND MEASUREMENT OF ULTRAWIDE BAND ANTENNA

賴坤成(Kun-Cheng Lai)

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(2008年)

摘要

近幾年來，無線通訊技術經過了蓬勃的發展，超寬頻技術變成了短距離、高速無線通訊很好的選擇。美國聯邦通訊委員會（FCC）於2002年允許開放超寬頻系統(UWB)的頻帶為3.1 GHz到10.6 GHz，此系統在商業上獲得廣泛運用。而此頻帶與其他無線通訊有共同使用的部份，例如：IEEE 802.11a、HYPERLAN 2，因此在設計天線時，需要考慮到頻帶截止的功能。
本論文利用共平面波導的結構，作為此天線的饋入網路，以U-shaped天線為基礎，討論將CSRR槽孔與L型槽孔，放置於共平面波導的接地平面上，其頻帶截止的效果，使用電磁模擬軟體(IE3D)模擬調整，再製作於FR4的印刷電路板上。將模擬與量測結果加以討論，除具有良好的ㄧ致性外，其Connected CSRR槽孔與L形槽孔皆可以達到頻帶截止的功能，在截止頻帶中天線增益皆小於-10 dBi。

關鍵字

共平面波導 ； 美國聯邦通訊委員會 ； 超寬頻

並列摘要

The Wireless communication technology has experienced a blooming growth in recent years. The Ultra-wideband becomes an attractive candidate for short range and high speed indoor data communication. In 2002, the U.S. Federal Communication Commission (FCC) officially allocated the spectrum from 3.1 to 10.6 GHz for unlicensed UWB communication applications. The UWB technology had be applied popularly for commercial product. Other wireless communication used same frequency with UWB. Like IEEE 802.11a and HYPERLAN2. When we design the UWB antenna, we must consider the band stop notch in the 5 GHz WLAN band.
In the thesis, We are going to etch the CSRR slot and L slot in the Ground plane of a coplanar waveguide (CPW) feed UWB antenna with U-shaped stub of the FR4 printed circuit board. According to the simulated and measured result, the good suppression level can be obtained at the desired notch band. And the antenna gain is under -10 dBi.

並列關鍵字

FCC ； UWB ； CPW

參考文獻

[1] 鄭鈞鴻, ”超寬頻天線之設計與應用,” June 2006.

[2] R. Chair, A.A. Kishk, and K.F. Lee, “Ultrawide-band Coplanar Waveguide- Fed Rectangular Slot Antenna,” IEEE Antennas and Wireless Propagation

Letters, Vol. 3, pp. 227-229, 2004.

[4] J. Kim, C.S. Cho, and J.W. Lee, “5.2 GHz notched ultra-wideband antenna

bands notched UWB antenna by loading SIR and SRR on the feed line,”