A Beam-Steerable Fabry-Perot Cavity by Mechanically Adjustable Partially Reflective Surface

In this paper, a Fabry-Perot cavity antenna showing beam-steering features by exploiting a mechanically adjustment of the Partially Reflective Surface (PRS) position is proposed. Fabry-Perot antennas are low-profile antennas that can reach excellent directivity with only one feeding point. However, the design of Fabry-Perot cavities becomes much more complicated when beam-steering is desirable. To face this issue, we propose a simple mechanical adjustment of the PRS position to obtain beam-steering, without introducing any modification of the radiating system original design. By performing accurate full-wave simulations over the conceived test-case, we obtained promising results. Even with a tilting beam angle up to $50^{\circ}$ the maximum Gain is higher than 15 dBi while the Half Power Beam Width has a mean value of $14.4^{\circ}$. Thus, the solution configures as an effective trade-off between simplicity and augmented features to be implemented in Fabry-Perot cavities.