以頻帶抑制技術實現多頻帶天線

Implementation of Multi-Band Antenna By Using the Frequency Band-Notched Techniques

魏于傑(Yu-Chieh Wei)

指導教授 ： 林丁丙

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00323

摘要

本篇論文目的為設計在寬頻帶天線中引入頻帶抑制機制來達到多頻帶的天線，以符合預期的應用。
我們將以WiMax為例，首先在矩形寬槽孔天線中，利用電容式饋入的寬頻特性和天線幾何參數對槽孔天線的影響，設計頻帶範圍為2GHz~6GHz的矩形寬槽孔天線。並進一步增加饋入端電感效應和共振路徑，而激發出更高頻的共振頻率進而增加頻寬，經過適當調整阻抗匹配後，天線的阻抗頻寬可達到2GHz~11GHz。
為了避免和其他無線網路系統頻帶重疊而產生干擾，在設計的寬頻天線中，再加入各式不同的頻帶抑制機制，來達到我們預定的多頻帶範疇。最後，實際製作並量測設計的天線，來驗證和模擬結果一致。

關鍵字

多頻帶 ； 共平面波導饋入 ； 平面寬槽孔天線 ； 頻帶抑制

並列摘要

The aim of this paper is to design the multi-band slot antenna by introducing the band-notched technology in the wide-band antenna for the expected applications.
First, through controlling the coupling of capacitively-fed with the wideband characteristic and considering the impact of geometrical parameters on the slot antenna, we design the antenna with bandwidth from 2GHz to 6GHz in the rectangular slot antenna for the WiMax application. Further, we excite out the higher resonant mode in order to increase the impedance bandwidth by increasing the inductance of the feeding line and the resonance route. After tuning properly the impedance matching, the impedance bandwidth can cover from 2GHz to 11GHz.
In order to avoid the interference from overlapping of the frequency band with other wireless network system, we introduce the different band-notched mechanisms on the wideband antenna designed previously. Then we can gain the antenna with multi-band that we expected. Finally, we show the simulated and measured result of antenna’s performance have in good agreement.

並列關鍵字

Multi-band ； CPW-fed ； Planar Slot Antenna ； Band-notched

參考文獻

[26] 鄒明祐，超寬頻天線小型化之設計與分析，碩士論文，國立台北科技大學，2005.

[39] 邱士豪，寬頻無線通訊用超寬頻天線之研究，碩士論文，國立台北科技大學，2004.

[1] IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems

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[3] J. S. Rao and B. N. Das, "Impedance characteristics of transverse slots in the ground plane of a stripline," Proc. IEE, vol. 125, pp. 29-32, Jan. 1978.