Affiliation:
1. The Naval Research Institute, Shanghai 200040, China
2. College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Abstract
To solve the problem of the large axial size of high-power microwave (HPM) reflectarray antenna and difficulty in vacuum packaging, a dielectric is introduced in the design of the antenna element. On this basis, a dielectric embedded metasurface reflectarray antenna (DEMRA) with high power handling capacity and wide-range beam scanning capability is proposed and fabricated. Compared with traditional HPM antennas, the DEMRA does not need to be sealed and can work directly in open-air conditions. The DEMRA can realize free regulation of the radiation beam within a cone angle of 90° and has a power handling capacity of 1 GW/m2. As verification, a protype working at 10 GHz is fabricated and low-power experiments are carried out. Experimental results are consistent with the simulation, proving that the DEMRA has a bandwidth exceeding 600 MHz. During the scanning process, the aperture efficiency is always higher than 48.98%, and the side lobe level remains below −15 dB. At the same time, the cross-polarization component is less than −15 dB, while the main lobe-axis ratio remains within 4.5 dB, confirming its beam scanning capability.
Cited by
4 articles.
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