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Bon-Jun Ku,안도섭,이성팔,A.V. Shishlow,A.S. Reutov,S.A. Ganin,A.G. Shubov 한국전자통신연구원 2002 ETRI Journal Vol.24 No.3
This paper presents the results of the numerical simulation of a multibeam active phased array antenna for a High Altitude Platform Station (HAPS). The simulation takes into account the random errors caused by the nonidentity of the array elements and the inaccuracy of the antenna calibration. The results of our statistical simulation show that the strict requirements on the sidelobe envelope for HAPSs can be met when the amplitude and phase distribution errors are minor, a condition which may be achieved by using digital beamforming.
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.