An electronic scanning leaky-wave antenna based on the half-mode corrugated integrated waveguide

An electronic scanning leaky-wave antenna based on the half-mode corrugated integrated waveguide is proposed in this paper. Electronic scanning is achieved by the employment of varactor diodes. The scanning angle ranges from -24°to +38°continuously at 5.8 GHz, and the gain is greater than 6 dB at all scanning angles. Meanwhile, the circular polarization is achieved by two symmetrical bent slots and the axial ratio is lower than 6 dB. Because of the advantage of half-mode corrugated integrated waveguide, this kind of antenna is compact and beneficial to be applied in some devices without via hole.