Linearly tapered slot antenna array with SIW feed network for 60 GHz applications

In this paper, a linearly tapered slot antenna (LTSA) array fed with a substrate integrated waveguide (SIW) is proposed. An SIW-based 4-way power divider with broadband and low loss properties is designed to implement a compact planar feed network. The array shows a gain of 21 dB with a return loss better than 15 dB over the band of interest (54-66 GHz). The total efficiency of the antenna array is 87 %. The antenna array has a cross polarization level of -22 dB. The proposed array is suitable for 60 GHz short range wireless communications.