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, TE
₁₀₁
and TE
₁₀₂
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.