寬頻矩形介質共振器天線之研究

Study of wideband rectangular dielectric resonator antenna

江東訓(Dong-Syun Jiang)

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(2010年)

https://doi.org/10.6841/NTUT.2010.00080

摘要

由於介質共振器天線之高介電係數與高品質因素，其單一共振模態之阻抗頻寬，多不足以應用於大部份之無線通訊系統。本論文以簡單的微帶線與偶極天線耦合方式，設計出具有寬頻特性之矩形介質共振器天線。
利用矩形介質共振器與微帶線特性，搭配調整微帶線介質基板之厚度，合併矩形介質共振器模態成具有寬頻操作特性之矩形介質共振器天線。除了天線結構簡單外，該天線於實測上，其阻抗頻寬符合反射損耗10 dB要求之操作頻段為3610 MHz至4075 MHz，約465 MHz或12％。而操作頻段內之天線增益，在接地面尺寸為60 × 60 mm2時可達6 dBi左右。
以偶極天線耦合相同尺寸與介電係數之介質共振器設計成混合式共振天線，其實測阻抗頻寬為2945 MHz至4374 MHz，約1429 MHz或39％。頻寬範圍可涵蓋全球互通微波存取3.5 GHz頻段，該頻段內天線增益約4 dBi左右。

關鍵字

微帶線 ； 寬頻 ； 矩形介質共振器天線 ； 混合式共振天線

並列摘要

A wideband rectangular dielectric resonator antenna coupled with a single microstrip line or a dipole antenna has been studied in this thesis. This study is importance because the impedance bandwidth of one resonant mode of a dielectric resonator antenna with high dielectric constant and high quality factor is mostly insufficient for wireless communication systems.
The design has incorporate the characteristic of the microstrip line and rectangular dielectric resonator. The height of the microstrip line is tuned to facilitate optimal coupling with modes of the rectangular dielectric resonator to form a wideband rectangular dielectric resonator antenna. The measured results show the impedance bandwidth is about 12% or 465 MHz from 3610 to 4075 MHz ( Return Loss ≥ 10 dB ), suitable for wideband application. The peak gain of this wideband rectangular dielectric resonator antenna is 6 dBi with a ground plane size of 60 x 60 mm2.
A hybrid resonator antenna designed with the same rectangular dielectric resonator exhibits an impedance bandwidth of 39% from 2945 to 4374 MHz. The designed hybrid resonator antenna shows a coverage of the FWA band in WiMAX application with a peak gain of 4 dBi.

並列關鍵字

wideband ； rectangular dielectric resonator antenna ； microstrip line

參考文獻

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