A novel modified angular log-periodic folded waveguide slow wave structure (MALPFW-SWS) is proposed for high-gain traveling wave tubes (TWTs). Each unit of the MALPFW-SWS has different dispersion ...

Abstract —The mechanism (s) underlying ventricular fibrillation (VF) remain unclear. We hypothesized that at least some forms of VF are not random and that high-frequency periodic sources of activity ...

In the High Frequency band, antennas for Over-The-Horizon (OTH) applications suffer from the uncontrolled radiation of surface waves. We propose here to load antennas with metamaterial in order to ...