An Evanescent-Mode Cavity-Backed High-Power Tunable Slot Antenna Semnani, Abbas ; Sinanis, Michael D. ; Peroulis, Dimitrios Abstract Publication: IEEE Transactions on Antennas and Propagation Pub Date: June 2019 DOI: 10.1109/TAP.2019.2905738 Bibcode: 2019ITAP...67.3712S