Xu Liang, Yuan Cheng-Wei, Zhang Qiang, Zhao Xu-Hao, Sun Yun-Fei, Yu Long-Zhou
The College of Advanced Interdisciplinary, National University of Defense Technology, Changsha 410073, China.
Rev Sci Instrum. 2019 Sep;90(9):094704. doi: 10.1063/1.5119270.
A three-layer aperture coupled microstrip antenna array (ACMA) is designed and fabricated for wideband high-power microwave (HPM) application, which has not been reported in the field of HPM. In this paper, the proposed antenna array overcomes the disadvantage of low power capacity of traditional microstrip antenna arrays. Moreover, based on the H-shaped aperture coupled structure, it enhances the relative bandwidth up to more than 50%. Compared with traditional HPM antennas, it has advantages of being low-profile (less than 0.2λ), wideband, lightweight, and easy to manufacture. The proposed antenna array consists of 60 elements; each element has four aperture coupled patch antennas fed by a four-way microstrip line power divider. In order to realize the modular design, the antenna array is divided into 10 identical modules; benefiting from this design, machining and assembling become easier. Additionally, cold tests and high-power tests are carried out, and the experimental results show that the ACMA achieves a relative bandwidth of 51.2% for voltage standing-wave ratio < 2 from 1.52 to 2.57 GHz. Consistent with simulation results, the measured gain is more than 28.8 dB in the whole bandwidth and it reaches a maximum of 32.1 dB. Finally, the high-power tests show that the power capacity of the proposed ACMA is greater than 140 MW, which proves the feasibility of the design in wideband HPM application.
设计并制作了一种用于宽带高功率微波（HPM）应用的三层孔径耦合微带天线阵列（ACMA），这在高功率微波领域尚未见报道。本文提出的天线阵列克服了传统微带天线阵列功率容量低的缺点。此外，基于H形孔径耦合结构，其相对带宽提高到50%以上。与传统的高功率微波天线相比，它具有低剖面（小于0.2λ）、宽带、轻质且易于制造的优点。所提出的天线阵列由60个单元组成；每个单元有四个由四路微带线功率分配器馈电的孔径耦合贴片天线。为了实现模块化设计，天线阵列被分成10个相同的模块；受益于这种设计，加工和组装变得更加容易。此外，进行了冷测试和高功率测试，实验结果表明，对于电压驻波比<2，ACMA在1.52至2.57 GHz范围内实现了51.2%的相对带宽。与仿真结果一致，在整个带宽内测得的增益大于28.8 dB，最大值达到32.1 dB。最后，高功率测试表明，所提出的ACMA的功率容量大于140 MW，这证明了该设计在宽带高功率微波应用中的可行性。
