An Wideband Single Ridge Waveguide-Based Slot Antenna with Low Profile

An antenna slotted in the long side of single ridge waveguide is designed this article, through the ridge waveguide-rectangular waveguide transition structure, it broads array's working frequency, meanwhile, Two ridge waveguides on a line in Chebyshev current distribution reduces side-lobe of the antenna. Single ridge waveguide slot antenna gains 17.7dBi in Center frequency, the relative bandwidth is about 6.4% below VSWR of 2 and the 2 * 8 designed antenna array has 500MHz bandwidth below VSWR of 1.5, it gains 27.18dBi in Center frequency, Chebyshev aperture distribution direction side-lobe level is -27dB. The structure size is 388.36mm*299mm*23mm. it has high gain, low profile, compact structure, low Side-lobe level, small size, ease of processing, which is suitable for portable satellite communication stations.