一維微帶光子能隙和缺陷性接地結構於微帶天線的應用研究

Study of 1-D Microstrip Photonic Bandgap and Defected Ground Structure for Microstrip Antenna Applications

馬宗鼎(Tsung-Ting Ma)

指導教授 ： 孫卓勳

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2009年)

https://doi.org/10.6841/NTUT.2009.00549

摘要

本論文應用一維微帶光子能隙和缺陷性接地結構於微帶天線之設計，藉由改變微帶線饋入網路之電容性與電感性，在某特定頻段時，具有慢波及帶拒的特性，可抑制微帶天線的高階諧波。天線的基頻皆有滿足XM (2.3 GHz)、ISM (2.4 GHz )、WiMAX (2.5 GHz~2.7 GHz) 規範的頻段，增益皆維持在2 dBi以上。論文中針對一維微帶光子能隙及缺陷性接地結構提出其個別的等效電路圖，且利用簡單電路分析法可以得到該等效電路各參數的數值，可合理解釋一維微帶光子能隙與缺陷性接地結構的頻帶特性。將缺陷性接地結構結合一維微帶光子能隙應用於微帶傳輸線上，發現其抑制高階諧波特性較兩者單獨存在時為佳。

關鍵字

一維微帶光子能隙 ； 缺陷性接地結構 ； 諧波抑制

並列摘要

In this thesis, the applications of 1-D microstrip Photonic Bandgap (PBG) and Defected Ground Structure (DGS) on microstrip antenna were presented. The proposed structures can modify the characteristics of the fed line such as line capacitance and inductance. In some frequency bands, the structure provides slow wave and bandstop characteristics which can eliminate the harmonic modes of microstrip antenna. The impedance bandwidth of the proposed antenna includes XM (2.3 GHz)、ISM (2.4 GHz) and WiMAX (2.5 GHz~2.7 GHz), with antenna gain above 2 dBi. The equivalent circuits for the proposed 1-D microstrop PBG and DGS were derived. The equivalent circuit parameters were extracted by using a simple circuit analysis method. By employing the extracted parameters the proposed structure can be explained. Moreover, the combination structure of the 1-D microstrip PBG and DGS was found to have a better harmonics suppression.

並列關鍵字

1-D Microstrip Photonic Bandgap ； Defected Ground Structure ； Harmonics suppression

參考文獻

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