<br>基于 SIW 的带漏波天线，具有改进的波束控制性能,IEEE Antennas and Wireless Propagation Letters

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基于 SIW 的带漏波天线，具有改进的波束控制性能
IEEE Antennas and Wireless Propagation Letters ( IF 3.7 ) Pub Date : 8-5-2022 , DOI: 10.1109/lawp.2022.3195215
Kuiwen Xu ₁ , Quan Wang ₁ , Lihui Lv ₁ , Qingfeng Zhang ₂ , Sheng Sun ₃ , Feixiang Luo ₄ , Xiling Luo ₄ , Liang Peng ₅ , Gaofeng Wang ₁

Affiliation

展示了一种工作在Ka波段的高扫描速率漏波天线（LWA），具有连续从后到前的波束扫描能力、良好的开阻带（OSB）抑制和宽扫描角度。所提出的 LWA 是通过在基板集成波导 (SIW) 上蚀刻一系列级联高 Q 谐振器和开放式不连续点而制成的。该谐振器的设计是在 SIW 的顶面上组合两个对称不平衡开口环谐振器 (USRR)。通过能带结构理论对 LWA 的工作机制进行了彻底的研究。通过研究谐振器结构的表面电流分布和等效电路模型，深入解释了 LWA 的特性。通过适当选择辐射槽的长度，可以有效缓解LWA的OSB。然而，天线扫描速率是通过谐振器（即USRR）的振荡质量直接提高的，这是通过调整USRR的分裂间隙来实现的。在实验中，制造并测量了所提出的 LWA 的原型。仿真和测量数据在天线的扫描范围和辐射增益方面表现出良好的一致性。测量结果表明，在 32 至 36 GHz 频段上呈现从 -56° 至 +48° 的连续光束扫描，这意味着每百分比的频谱扫描率为 8.84°。最后表明平均增益可达9.1 dBi。

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SIW-Based -Band Leaky-Wave Antenna With Improved Beam Steering Performance

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 LWA's working mechanics were thoroughly investigated through band structure theory. An in-depth interpretation of the LWA's characteristics is provided by studying the surface current distribution and the equivalent circuit model of the resonator structure. The LWA'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 antenna's scanning range and radiation gain. The measured results indicates that a continuous beam scanning from −56° to +48° is rendered over the frequency band from 32 to 36 GHz, which implies a spectral scanning rate of 8.84° per percentage. Finally, it is shown that the average gain can reach up to 9.1 dBi.

更新日期：2024-08-28

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