SIW Based Ka-band Leaky-Wave Antenna with Improved Beam Steering Performance
SIW Based Ka-band Leaky-Wave Antenna with Improved Beam Steering Performance
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基于 SIW 的 Ka 波段漏波天线，具有改进的波束控制性能
DOI：
10.1109/lawp.2022.3195215
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发表时间：
2022
影响因子：
4.2
通讯作者：
Gaofeng Wang
中科院分区：
文献类型：
--
作者：
Kuiwen Xu;Quan Wang;Lihui Lv;Qingfeng Zhang;Sheng Sun;Feixiang Luo;Xiling Luo;Liang Peng;Gaofeng Wang
设计了一种工作在Ka波段的高扫描速率漏波天线，该天线具有连续前向波束扫描能力、良好的开阻带抑制能力和宽扫描角。提出的LWA是通过在基片集成波导（SIW）上刻蚀级联高Q谐振器阵列和开口不连续性制成的。该谐振器是由两个对称不平衡的开口环谐振器（USRR）在基片集成波导的顶面组合而成。通过能带结构理论对LWA 0027;的工作机理进行了深入的研究。通过研究表面电流分布和谐振器结构的等效电路模型，对LWA 0027的特性进行了深入的解释。通过合理选择辐射槽的长度，有效地缓解了LWA 0027;s OSB。然而，天线扫描速率通过谐振器的振荡质量（即，USRR），这是通过调整USRR的分裂间隙来实现的。在实验中，所提出的LWA的原型制造和测量。天线的扫描范围和辐射增益的模拟和测量数据显示出良好的一致性。测量结果表明，在32 ~ 36 GHz的频带内，束流从-5600B_0 ~002B_0 ~ 4800B_0连续扫描，扫描率为8.8400B_0/ %。最后，它表明，平均增益可以达到9.1 dBi。
A high-scanning rate leaky-wave antenna (LWA) working at Ka band with continuous backward-to-forward beam-scanning capability, good open stopband (OSB) suppression and wide scanning angle is exhibited. The proposed LWA is made by etching an array of cascaded high-Q resonators and open discontinuities on the substrate integrated waveguide (SIW). The resonator is designed by combining two symmetrically unbalance split ring resonators (USRRs) on the top surface of the SIW. The LWA0027;s working mechanics were thoroughly investigated through band structure theory. An in-depth interpretation of the LWA0027;s characteristics is provided by studying the surface current distribution and the equivalent circuit model of the resonator structure. The LWA0027;s OSB is effectively alleviated by properly selecting the length of the radiation slot. Yet, the antenna scanning rate is directly improved by the oscillation quality of the resonators (i.e., USRRs), which is realized by tuning the split gap of the USRR. In the experiments, a prototype of the proposed LWA was fabricated and measured. The simulated and measured data show good agreement in terms of the antenna0027;s scanning range and radiation gain. The measured results indicates that a continuous beam-scanning from -5600B0; to 002B;4800B0; is rendered over the frequency band from 32GHz to 36GHz, which implies a spectral scanning rate of 8.8400B0; per percentage. Finally, it is shown that the average gain can reach up to 9.1 dBi.