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Multibeam and Multi-Faced DBF Antenna for HAPS (High Altitude Platform Station)
Bon-Jun Ku,Jong-Min Park,Do-Seob Ahn,A.V.Shishlov,A.M.Shitikov,S.A.Ganin,A.G.Shubov 에스케이텔레콤 (주) 2002 Telecommunications Review Vol.12 No.5
Multibeam antennas with digital beamforming (DBF) and analog beamforming (ABF) for the Stratospheric Communication System or HAPS are compared each other. The method of optimal cell forming on the earth surface by a group of the active phased array antennas is presented and the required accuracy of amplitude and phase distribution for channels of Active Phased Array Antenna (APAA) is obtained. Some examples of beam arrangement are given. For covering the service area from nadir to a circle of radius of 55 km by 199 beams, the antenna implemented as a system of seven flat panels is proposed.