Design of substrate integrated waveguide based power divider for S-band applications

In this paper, a SI W based power divider for S-band applications is proposed. The proposed power divider is designed using Y-junction configuration on Rogers R04360 substrate with dielectric constant of 6.15 and substrate thickness of 1.52 mm. The high dielectric constant substrate is selected for the sake of minimizing the dimension of power divider. The proposed power divider is numerically analyzed in terms of return loss and output power equality. Besides that, various characteristic of power divider is also investigated as an effect of different vias diameter of SIW and different types of transition structure. Based on the numerical analysis, the proposed SIW based power divider demonstrates a good performance over the frequency range of 2-3.6 GHz with return loss less than -15 dB in the 2-2.4 and 2.7-3.6 GHz band. The output power equality achieves 3.4 ± 0.2 dB approximately.