Flexible dual-frequency substrate integrated waveguide antenna based on metamaterial

In this paper, a dual-frequency substrate integrated waveguide (SIW) fed antenna working in the Ka-band has been proposed. The aperture etched with complementary electric-lc (cELC) metamaterial units, which resonant frequency can be controlled flexibly. Compared to the operating wavelength, the size of the antenna is considerably small. With features of simple structure and flexible design, the proposed antenna has potential applications in the millimeter-wave radar and communication system. The performance of the antenna is characterized with the full-wave simulation.