適用於WLAN/WiMax/UWB 天線之研究

The Research of Antenna for WLAN/ WiMax / UWB Applications

陳韋志(Wei-Chih Chen)

指導教授 ： 蔡崇洲

崑山科技大學/資訊科技學院/電腦與通訊研究所/碩士(2012年)

https://doi.org/10.6828/KSU.2012.00049

摘要

在本論文中主要是提出三種天線，第一種架構是單極天線，藉由中間饋入雙層板方式進行寬頻的阻抗匹配，並在細小的輻射端作一個開放式槽孔，來達到擴大高頻振盪區的頻寬，使整支天線的設計可以達到雙頻且寬頻的特性，包含的頻率範圍為2.31-3.83GHz及4.88-6.0GHz，使此天線可適用於WLAN及WiMAX的系統應用。
第二種也是單極天線的架構，主要是藉由具對稱斜邊的地端與矩形輻射端之間的感應來達到接近超寬頻的特性，再經由饋入線與地端槽孔的匹配來達到超寬頻特性，使天線達到2.3GHz到15.28GHz的超寬頻，除了能使用在WLAN 和 WiMAX 還能使用在UWB頻段。
第三種為平板天線，而輻射端與接地端具有相同尺寸，藉由在接地端的U形槽孔來產生足夠的頻寬，且藉此讓輻射能量集中，使本天線的增益值與相同尺寸的平板天相比是略為提高，本天線的頻寬範圍為2.34-2.52GHz，可使用在WLAN 的2.4-2.485GHz頻段。本論文將呈現這三種天線的架構、頻寬、增益值與場形等的模擬與實作比較與討論。

關鍵字

單極天線 ； 平板天線 ； 陣列天線 ； 雙頻 ； 寬頻 ； WLAN ； WiMax ； UWB

並列摘要

The main proposal for this thesis is three antenna types, one of which is the asymmetric monopole antenna. This antenna structure is to create the broadband impedance match by feeding it through the middle of a two-tier board. In addition to this is the smaller radiator has been fitted with an open slot to expand the bandwidth of the high frequency oscillation. As a result the entire design of this antenna can achieve the dual-band and broadband characteristics, including the frequency range of 2.31-3.83GHz and 4.88-6.0GHz. This antenna can also be applied to the WLAN and WiMAX systems.
The second structure is the monopole antenna, which is connected by the gap between the symmetrical bevel ground and the radiator to create an oscillation broadband. Then through the ground ladder grove it will allow the antenna to achieve Ultra-wideband features, including the frequency range of 2.3-15.28GHz and usable in the WLAN, WiMAX and UWB bands.
The third structure is the patch antenna. It is constructed by using the square radiator and a U slot type of the ground. This is due to the box design which allows the antenna field type radiation pattern to go up and high-gain characteristics. It has the frequency range of 2.34-2.52GHZ and it can be used in the WLAN band.

In this thesis, these three antenna structures, bandwidth, gain value and the radiation patterns provide comparing results such as simulation and implementation upon discussion.

並列關鍵字

Monopole ； Patch antenna ； Array Antenna ； Dual band ； Broad band ； WLAN ； WiMax ； UWB

參考文獻

[1] B. G. Duffley, G. A. Morin, M. Mikavica, and Y. M. M. Antar, “A Wide-Band Printed Double-SidedDipole Array”, in IEEE Trans. Ant. & Propagat., vol. 52, no. 2, pp. 628-631, Feb. 2004.

[2] Tai-Lee Chen, “Multi-band printed sleeve dipole antenna”, Electronics Letters 9th Jan. 2003, Vol. 39, No. 1.

[3] Qing-Qiang He, Bing-Zhong Wang and Jun He, “Wideband and Dual-Band Design of a Printed Dipole Antenna”, IEEE Antennas and Wireless Propagation Letters, Vol. 7, 2008.

[4] Yen-Liang Kao and Kin-Lu Wong, “Printed Double-T Monopole Antenna for 2.4/5.2 GHz Dual-Band WLAN Operations”, IEEE Transactions on Antennas and Propagation, Vol. 51, No. 9, Sep. 2003.

[5] Mustapha Harmouzi, Mohamed Essaaidi, Mohamed Ben Ahmed and Mohammed Bouhorma, “A Compact T-Shaped Antenna for Dual-Band WLAN Communication”, Microwave Symposium (MMS), 2009 Mediterrannean, 15-17 Nov. 2009, Tangiers .