Vertical wire cage antenna at the Moosbrunn shortwave transmitting station of the Austrian Broadcasting Service (Österreichischen Rundfunksender GmbH, ORS), Moosbrunn, Austria. This is probably a conical monopole antenna, a broadband omnidirectional antenna widely used in the high frequency (HF) band. It consists of equally spaced wire radiators arranged around the central mast in the form of two cones base-to-base.