Performance analysis of a novel metamaterial-inspired substrate-integrated cavity for 5G applications Stamatis Amanatiadis, Vasileios Salonikios, Nikolaos Kantartzis and Traianos Yioultsis EPJ Appl. Metamat., 11 (2024) 6 Published online: 29 March 2024 DOI: 10.1051/epjam/2024009