Abstract: The effect of rain wetting a planar array antenna is reduced substantially by mounting the antenna with its radiating face facing downwards on an angle .alpha. of about 30-80.degree. to the horizontal and adjusting the angle .theta. of the main beam of the planar array antenna to its radiating face so that the angle .theta. of the main beam to the radiating face of the antenna and the angle .alpha. of the radiating face to the horizontal combine to direct the main beam at the elevation angle .omega. toward a selected target.

Abstract: An intrabuilding wireless communication system is disclosed wherein a work space is divided into a radiation zone seldom entered or occupied by workers and into which the signal carrying radiation is directed and contained i.e. the space adjacent to the ceiling and extending down about 1 meter and a substantially radiation free zone that is mormally occupied by workers. A master node antennae and each of the subscriber antennae (one for each work station in the work space) are located within the radiation space.The master antennae will preferably be an omni-directional antennae formed by a pair of substantially mirror image frusta-conical disks, axially aligned along their conical axes and with their minimum radius end faces in spaced parallel facing relationship.