SIW beamforming of 2 × 2 and 4 × 4 AFLTSA arrays for MMW applications

Abstract

In this paper, a beamforming technique using multimode section based on s-parameters has been analyzed for antipodal fermi-linear tapered slot antenna (AFLTSA). The analysis is proposed for 2 × 2 and 4 × 4 sub arrays on Rogers 5880 substrate with a relative dielectric permittivity εr=2.2 in order to achieve an objective of high gain and narrow beamwidth, which can be used for target tracking and precise detection applications. The solution frequency is chosen as 32.5 GHz which yields 3 dB beamwidth of ~ 20° and ~13° for 2 × 2 and 4 × 4 AFLTSA structures respectively. The realized gain achieved for these two structures is 12.39 dB and 14.19 dB respectively. The simulation results for multimode section and sub array antenna structures are presented using Ansoft HFSS simulation tool.