Microstrip feeding for the excitation of a higher-order resonant mode in cylindrical dielectric resonator antennas

2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI:10.1109/IMOC.2017.8121088

M. H. Seko, F. S. Correra, S. Long, D. Jackson

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引用次数: 4

Abstract

This paper proposes a new feeding scheme for exciting a higher-order resonant mode in cylindrical dielectric resonator antennas. The proposed feeding structure comprises a nonresonant microstrip patch connected to a narrow microstrip line by means of an inset. Both the microstrip patch and line are located under the antenna radiating element (dielectric resonator). A parametric analysis of this feeding structure has been carried out using electromagnetic simulation. The results of this analysis indicate that the antenna impedance matching can be adjusted by changing the length of the inset, and that different values of directivity and impedance bandwidth can be obtained by using different microstrip patch sizes and inset lengths. An antenna prototype has been designed and fabricated to validate the proposed feeding structure using a dielectric resonator with a high dielectric constant. The measured resonance frequency and impedance bandwidth of this prototype are 6.20 GHz and 25.0 MHz (fractional bandwidth of 0.403%), respectively, showing good agreement between simulated and experimental results.

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圆柱形介质谐振器天线中用于高阶谐振模式激励的微带馈电

本文提出了一种激发圆柱形介质谐振器天线高阶谐振模式的馈电方案。所提出的馈电结构包括非谐振微带贴片，该贴片通过插片连接到窄微带线。微带贴片和线路都位于天线辐射元件(介电谐振器)的下方。利用电磁仿真对该进给结构进行了参数化分析。分析结果表明，通过改变插片长度可以调节天线阻抗匹配，采用不同的微带贴片尺寸和插片长度可以获得不同的指向性值和阻抗带宽。利用高介电常数的介电谐振器设计并制作了天线样机，验证了所提出的馈电结构。该样机的实测谐振频率为6.20 GHz，阻抗带宽为25.0 MHz(分数带宽为0.403%)，仿真结果与实验结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)

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