DESIGN AND OPTIMIZATION OF CONFORMAL DIELECTRIC RESONATOR ANTENNA ARRAY BASED ON APERTURE-COUPLED SERIES-FEEDING APPROACH
DESIGN AND OPTIMIZATION OF CONFORMAL DIELECTRIC RESONATOR ANTENNA ARRAY BASED ON APERTURE-COUPLED SERIES-FEEDING APPROACH
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DOI：
10.2528/pierc20112701
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发表时间：
2021
影响因子：
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通讯作者：
Hongmei Liu;Niu Yue;Tielin Zhang;S. Fang;and Zhongbao Wang
中科院分区：
文献类型：
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作者：
Hongmei Liu;Niu Yue;Tielin Zhang;S. Fang;and Zhongbao Wang
提出了一种基于口径耦合串联馈电的新型共形介质谐振器天线阵列。该天线由8个弯曲的宽度渐变的微带单元组成，馈电结构简单。提出的设计通过采用单元宽度渐变的方法，使电流幅值分布呈锥形，从而获得低旁瓣电平（SLL）特性。此外，在单根馈电线中插入额外的匹配线，以实现更好的阻抗特性。为了验证所提出的设计的性能，共形阵列的制作和测试在电波暗室。测得的阻抗带宽（|S11| <-10 dB）的频率范围为5.78 GHz至5.87 GHz。在5.8 GHz频率下，该天线的实测峰值增益为14.75 dBi，SLL为− 19.3 dB。该阵列在E面和H面的极化鉴别力均大于20 dB。样机的测试结果表明，该设计具有应用于曲面无线通信系统的潜力。
A novel conformal dielectric resonator antenna (DRA) array based on aperture-coupled series-feeding approach is presented for wireless communication. The antenna is composed of eight curved width-gradated DRA elements with a simple feeding structure. The proposed design presents a tapered current amplitude distribution by using DRA element width gradation method, and low side-lobe level (SLL) characteristic can be obtained. Besides, an extra matching line is inserted into the single feeding line to realize better impedance characteristic. To validate the performance of the proposed design, the conformal array is fabricated and measured in an anechoic chamber. The measured impedance bandwidth (|S11| < −10 dB) of the fabricated prototype is from 5.78 GHz to 5.87 GHz. At 5.8 GHz, the antenna offers a measured peak gain of 14.75 dBi and SLL of −19.3 dB. The polarization discriminations of the array on Eand H-planes are greater than 20 dB. The measured results of the fabricated prototype demonstrate that the proposed design has the potential to be applied to wireless communication system with curved surface.