Title :
Development of receiving APAA using DBF for HAPS to provide IMT-2000 service system
Author :
Ku, Bon-Jun ; Park, Jong-Min ; Kim, Yang-Su ; Ahn, Do-Seob
Author_Institution :
Commun. Satellite Dev. Center, Electron. & Telecommun. Res. Inst., Seoul, South Korea
Abstract :
High altitude platform station (HAPS) would be located at 20 km above sea level and has a multibeam antenna system. In the multibeam antenna system using the same frequency in all beams, we need a strict radiation beam pattern to reduce the interference between beams and into other services. We analyze the required minimum errors of amplitude and phase distribution on each channel because they affect the sidelobe level in the radiation beam pattern. The statistical simulation results investigated in this paper reveal that the active phased array antenna (APAA) system based on the digital beamforming (DBF) technology is an efficient solution for the HAPS payload. We introduce a prototype of a receiving DBF APAA with 19 elements, and demonstrate the characteristics in IMT-2000 frequency bands.
Keywords :
3G mobile communication; antenna phased arrays; antenna radiation patterns; array signal processing; multibeam antennas; radiofrequency interference; receiving antennas; 20 Km; IMT-2000 service; amplitude error; beam interference; digital beamforming technology; frequency band; high altitude platform station; multibeam antenna system; phase distribution; radiation beam pattern; receiving active phased array antenna; sea level; sidelobe level; Array signal processing; Interference; Pattern analysis; Payloads; Phased arrays; Prototypes; Radio frequency; Read only memory; Satellite antennas; Sea level;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285994
