Abstract: A millimeter-wave antenna for 5G applications is provided which includes an upper outer layer with a plurality of first radiating elements arranged spaced apart from each other on a first dielectric sublayer, a first inner layer arranged below the upper outer layer and having a plurality of through slots for conveying, towards the first radiating elements feeding signals to be radiated, a second inner layer arranged below and adjacent to the first inner layer having a dielectric sublayer on which there is arranged a plurality of conductive lines for conducting the feeding signals to be radiated towards the first radiating elements, a further inner layer arranged below and adjacent to the second inner layer, and a plurality of first through openings each formed on the further inner layer in a position corresponding to the position of an associated through slot.

Abstract: A muffler unit for a fume extractor hood includes an active noise suppression system, at least one loudspeaker, and at least two microphones connected to a control unit, and a passive noise suppression system having sound-absorbent material disposed between the microphones. The muffler unit further includes a conduit with upper fixing element and lower fixing element designed to be removably fixed to a motor unit and to a conveyor plate of the hood.