超寬頻介質共振器天線設計

Design of Ultrawideband Dielectric Resonator Antennas

林君達(Jiun-Da Lin)

指導教授 ： 孫卓勳

共同指導教授 ： 賴柏洲

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00053

摘要

本篇論文使用了一種低介電常數的材料來取代傳統的介質共振器。分析探討新形式的介質共振器天線並將其使用於超寬頻的應用上。
首先，本篇論文提出了一種混合式的天線結構，搭配上寄生槽孔來增加介質共振器天線的操作頻寬。利用共平面波導饋入和寄生槽孔，使得介質共振器天線在設計更具有靈活性。阻抗頻寬為3.1GHz-4.9GHz，天線增益分別為3.6dBi和2.36dBi，皆符合超寬頻應用技術中多頻帶正交分頻多工(MultiBand-Orthogonal Frequency Division Multiplexing；MB-OFDM)的第一個頻帶規範(3.168-4.752GHz)。最後，本篇論文介紹另一種天線結構，藉由改變介質共振器的尺寸來滿足超寬頻當中低頻帶的邊界條件。使用微帶線饋入的方式可以更符合超寬頻的輻射特性。透過量測的結果，此介質共振器天線具有良好的輻射場型、高天線增益5.2dBi、阻抗頻寬為3.03GHz-11GHz和小型化尺寸( )，皆符合超寬頻應用技術中MB-OFDM的規範(3.168-10.56GHz)。此外，本篇論文所介紹的介質共振器天線，因為介質共振器的材料簡易且易於製作，所以非常適用於一般工廠大量生產製造。

關鍵字

介質共振器天線 ； 超寬頻應用 ； 混合式結構

並列摘要

In this thesis, The new dielectric resonator antenna(DRA) is implemented by replacing the traditional dielectric resonator with a new material with low permittivity for ultrawideband (UWB) application is presented and studied.
First, a hybrid structure DRA was designed with parasitic slot to enhance the impedance bandwidth. The flexible design consist of a coplanar waveguide (CPW) feed and parasitic slot. The bandwidth met the specification of MB-OFDM for the bandwidth(3.168-4.752GHz). Finally, another antenna structure was designed by changing the size of the dielectric resonator to satisfy the boundary conditions of the lower band. By applying the microstrip feed line, UWB and radiation characteristics are achieved. From the measured results, the proposed DRA showed good radiation pattern, high gain (5.2dBi), wide bandwidth (3.03-11GHz) and compact size ( ). The bandwidth met the specification of MB-OFDM (3.168-10.56GHz).The antenna system proposed in this work showed potential for mass production due to the simplicity of the design.

並列關鍵字

Dielectric resonator antenna ； ultrawideband application ； a hybrid structure

參考文獻

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