Patent ID: 7221962

Claim:
A telecommunications radio system for mobile communication services comprising a first base station having a plurality of antennas and located at a site, the base station covering an area subdivided into a multitude of sectors by the antennas, wherein: the site comprises a structure with a height of at least 50 m from erection ground; the base station is located on the structure at a height of at least 50 m from erection ground; and the plurality of antennas having: a first set of the antennas arranged in a first ring situated in a first plane orthogonal to and concentric with a longitudinal axis of the structure; and a second set of the antennas arranged in a second ring situated in a second plane orthogonal to and concentric with the longitudinal axis of the structure, wherein the antennas in the second set are different from and greater in number than the antennas in the first set, such that the second ring of antennas provides denser sectorization than that provided by the first set of antennas; and wherein the plurality of antennas results in a substantially uniform power flow density of approximately −21 dBm/square meter, in the area and at approximately ground level for an approximate 10 W transmitting power per sector.