Triple-Band Dual-Polarized Ku-band SIW antenna

The design of a triple-band dual-polarized substrate integrated waveguide (SIW) cavity back antenna is proposed in this paper. A T-shaped SIW cavity is conceived. The two mutually perpendicular slots etched on the top metallic surface generate two orthogonal linear polarizations (LP). One of these slots is etched on the longitudinal arm which resonates at 14.75 GHz. The other slot on the transverse arm results resonances at 13.14 GHz and 14.35 GHz. The antenna exhibits a gain of about 4.7dBi, 5.3dBi and 6.1dBi at 13.14 GHz, 14.35 GHz and 14.75 GHz respectively. The 3dB beam-widths are about 74° × 85°.