An axially corrugated horn antenna with an elliptically shaped taper is proposed for satellite communication applications. This structure is a good candidate for the feed of reflectors and also for improving the electrical properties of reflector antennas. A tapering method is used to justify the horizontal location of the corrugation profile which improves the electrical performance of the pre...

The paper presents the aerodynamic performance of an axial reversible fan for high air temperatures, obtained by applying similarity theory and numerical flow simulations. This analysis was performed possibility installing existing structure impeller a in jet longitudinal ventilation tunnel. direction forced tunnels changes, it is always towards low atmospheric pressure, i.e. natural flow. Thes...