Abstract
To enhance the power capacity and bandwidth of antenna arrays, a high-power broadband reflectarray antenna with height adjustment has been proposed. The high-power reflectarray comprises reflective elements, a beam scanning control system, and a high-power feed source. In the design, the high-power feed source horn radiates GW-level high-power microwave radiation onto the reflective elements, which adjust their relative height through the beam scanning control system to compensate for phase shifts, enabling the beam to be steered in any direction. The reflective elements utilize a novel total internal reflection form, offering a simple structure that ensures the power capacity and aperture efficiency, as well as bandwidth of the antenna array. Full-wave simulation results demonstrate that this phased array can achieve a 360° phase shift, two-dimensional ±50° beam scanning, an aperture efficiency of 81%, a -1dB bandwidth of 10.8%, and a power capacity of 14GW.
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