Broadband Circularly Polarized Filtering Antennas
Broadband Circularly Polarized Filtering Antennas
复制标题
宽带圆偏振滤波天线
DOI：
10.1109/access.2018.2883494
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发表时间：
2018-11
期刊：
影响因子：
3.9
通讯作者：
Zhiqun Cheng
中科院分区：
文献类型：
--
作者：
Yazhou Dong;Steven Gao;Qi Luo;Lehu Wen;Chun-Xu Mao;Shi-Wei Dong;Xiaojun Li;Gao Wei;Youling Geng;Zhiqun Cheng
本文由两部分组成。第一部分综述了宽带圆极化滤波天线的最新研究进展。第二部分提出了一种基于八模SIW （EMSIW）谐振器的新型宽带集成滤波天线设计。这项工作有三个主要的新颖贡献。首先，通过调整滤波天线内谐振腔的外部质量因子和耦合系数，在滤波天线内实现具有复值的最佳输入阻抗。这样就不需要在天线和整流电路之间建立外部阻抗匹配网络；其次，与传统微带谐振器相比，采用高q EMSIW腔体提高天线增益；第三，EMSIW谐振器之间的耦合间隙也充当了辐射器的馈电结构。所以喂食结构都在中间层。背面的接地面是一个完整的结构，没有任何缺陷。这种新颖的结构设计改善了前后比，提高了天线的接收效率。为了验证该方法，设计、仿真并制作了两个输入阻抗为50 $\Omega $和复杂阻抗的c波段圆极化集成滤波天线。测量结果表明，该天线在c波段的工作频带带宽大于14.5%，增益大于8dbi。3db轴比带宽大于8.5%，前后比大于18db。此外，所设计的复阻抗天线与特定整流电路在5.8 GHz的输入阻抗进行了共轭匹配，实现了二次谐波抑制。
This paper consists of two parts. The first part presents a review of the recent development in broadband circularly polarized filtering antennas. The second part presents a novel design of broadband integrated filtering antenna based on eighth-mode SIW (EMSIW) resonators for rectenna applications. This work has three main novel contributions. First, by adjusting the external quality factors and coupling coefficients of the resonators in this filtering antenna, optimum input impedance with a complex value can be realized within the filtering antenna. Thus there is no need for an external impedance matching network, which is usually required between the antenna and the rectifying circuits; Second, compared with traditional microstrip resonators, high-Q EMSIW cavities are used to increase antenna gain; third, the coupling gap between the EMSIW resonators also acts as the feeding structure of the radiator. So the feeding structures are all on the middle layer. The ground plane on the back side is a complete structure without any defects. This novel structure design improves front-to-back ratio to enhance the antenna receiving efficiency. To validate this method, two C-band circularly polarized integrated filtering antennas with an input impedance of 50 $\Omega $ and complex impedance are designed, simulated, and fabricated. The measured results show that the operating frequency bandwidth of the proposed antennas is more than 14.5% at C-band with the gain above 8 dBi. The 3-dB axial ratio bandwidth is larger than 8.5% and the front-to-back ratio is higher than 18 dB. Moreover, the proposed antenna with complex impedance is conjugate matched with the input impedance of a specific rectifying circuit at 5.8 GHz and harmonics suppression at the second-harmonic frequency is achieved.
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影响因子：
5.7
作者：
Jiang, Zhi Hao;Werner, Douglas H.
通讯作者：
Werner, Douglas H.
DOI：
10.1109/mwsym.2010.5516915
发表时间：
2010-05
期刊：
2010 IEEE MTT-S International Microwave Symposium
影响因子：
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作者：
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通讯作者：
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影响因子：
4.3
作者：
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通讯作者：
EVES, EE
影响因子：
3.9
作者：
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通讯作者：
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DOI：
10.1109/tmtt.2014.2300451
发表时间：
2014-01
影响因子：
4.3
作者：
Shen, Fazhong;Huangfu, Jiangtao;Li, Changzhi;Ran, Lixin
通讯作者：
Ran, Lixin