Backward-to-Forward Wide-Angle Fast Beam-Scanning Leaky-Wave Antenna With Consistent Gain
Backward-to-Forward Wide-Angle Fast Beam-Scanning Leaky-Wave Antenna With Consistent Gain
复制标题
具有一致增益的从后到前广角快速波束扫描漏波天线
DOI：
10.1109/tap.2020.3029721
复制
发表时间：
2021-05-01
影响因子：
5.7
通讯作者：
Peng, Liang
中科院分区：
文献类型：
--
作者：
Jiang, Hao;Xu, Kuiwen;Peng, Liang
提出了一种具有连续自后向前向波束扫描能力和一致增益的平面周期漏波天线。PLWA由一种新型的周期性排列的曲折线结构组成，其中相邻单元之间的电容耦合是实现高扫描速率的关键。详细地说，通过改变相邻单元之间的间距，在不显著改变工作频带的情况下，所提出的PLWA的波束扫描速率被有效地调谐。为了减少开路阻带(OSB)和改善阻抗匹配，在单个弯曲线单元中引入多个电感开路短桩以增强辐射。在实验中，制作了所提出的PLWA的原型并进行了测量。模拟波束与测量波束在扫描距离和辐射性能方面具有很好的一致性。在5.95~7.1GHz频段，实现了从−60°到+58°的连续波束扫描，实现了102.6°/GHz的实际扫描速率。此外，在所有测量频率下，PLWA的平均增益水平为11.96dBI，变化小于2dBm，旁瓣小于−10dB.该结构具有结构紧凑、制作简单、无色散等优点，在雷达、微波成像、无线通信等领域具有潜在的应用前景。
A planar periodic leaky-wave antenna (PLWA) with continuous backward-to-forward beam-scanning capability and consistent gain is presented. The PLWA is made of a new type of periodically arranging meander line structures, in which the capacitive coupling between neighboring units plays the key role in achieving a high scanning rate. In detail, the beam-scanning rate of the proposed PLWA is efficiently tuned by varying the gap between two adjacent units, without considerably changing the working frequency band. To mitigate the open stopband (OSB) and to improve the impedance matching, several inductive open stubs are introduced into a single meander line unit cell to enhance the radiation. In the experiment, a prototype of the proposed PLWA was fabricated and measured. The simulated and measured beams show good agreement in terms of scanning range and radiation performance. A continuous beam scanning from −60° to +58° through broadside in the frequency band of 5.95–7.1 GHz is observed, and hence, a 102.6°/GHz scanning rate is realized in practice. Besides, the PLWA shows an average gain level of 11.96 dBi with a variation lower than 2 dB and a sidelobe below −10 dB at all the measured frequencies. The proposed PLWA may have potential applications in radar, microwave imaging, and wireless communication due to its compact structure, easy to fabricate, and dispersionless performance.