Simulation and experimental measurement of digital multi-beamforming phased antenna array in the frequency range C

Abstract

The selection of element for constructing a phased array antenna was carried out. It provides a relative frequency bandwidth up to 9% for the transmitting or receiving part in wireless communication system. Methods of reducing the sidelobe for the far field pattern are compared and analyzed. The superposition of excitation signals for a flat phased array antenna was implemented to simultaneously generate the emission of independent beams in a far radiation field. The calculation and optimization of progressive distribution was performed for phase shifts in the excitation signal group from the horizontal and vertical directions of the phased array plane for a radiation (reception) of independent beams in space. An experimental sample of a digital phased array antenna was developed using microstrip technology. A novel digital feeding method is proposed and employed in Multiple Input Multiple Output (MIMO) communications system. An experimental measurement was carried out in term of the voltage standing wave ratio, the relative frequency bandwidth and the radiation pattern of sample from digital beamforming technology. Keywords: Phased array antenna, Radiation pattern, Digital beamforming, Standing wave voltage ratio