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physics.app-ph2026
Upper Bounds on Efficiency of Pixel Antennas
Albert Salmi, Philipp del Hougne, Leo Lahti +1
This letter presents a method to compute fundamental bounds on the total efficiency of pixel antennas. Using semidefinite relaxation, we obtain an upper bound on the optimization p…
physics.app-ph2026
Fully Scalable Polarization-Reconfigurable S/X-Band Shared-Aperture Phased Array for Ultra-Low Axial-Ratio Scanning
Mohamed Räsänen, Juha Ala-Laurinaho, Samuel de Jésus Ndimubandi +8
This paper presents a modular S-/X-band shared-aperture phased-array antenna (SAPAA) for satellite-communication ground-station reception. The proposed architecture uses a repeatab…