English: Short wave broadcasting antenna at the Moosbrunn transmitting station of the Austrian Broadcasting Service (Österreichischen Rundfunksender GmbH, ORS), Moosbrunn, Austria. This is a curtain antenna, a high gain directional wire antenna used on the high frequency (HF) bands by shortwave broadcasting stations for long distance international broadcasting. It consists of a 4x4 double array of wire dipoles fed in phase. It radiates a beam of radio waves at a shallow angle above the horizon. The radio waves are reflected by the ionosphere back to earth beyond the horizon to cover a listening area in another country. It transmits on 25, 19, 16, and 13 meters, with an output power of 300kW. The antenna's gain is just over 20 dB. It is oriented to transmit at angles of 85° and 265°