A dual-frequency antenna based on substrate integrated waveguide (SIW) in millimeter-wave range

This paper presents a novel way to design dual-frequency slot antenna based on substrate integrated waveguide (SIW) in millimeter wave range. The existing of first two modes in SIW resonator, TE101 and TE102 modes, ensure that slot cuts the current of two modes at the same time which leads to a dual-frequency performance of the slot antenna. The proposed antenna resonates at 25.8 GHz and 31.5 GHz with gain of 6.3 dB and 6.9 dB, respectively.