Design of High-Power Capacity Dual-Polarized Ridged Waveguide Slot Array Antenna

In this paper, a high-power capacity dual-polarized slot array antenna using ridged waveguide technology is proposed. Ridged waveguide is employed to reduce the overall size of the antenna. The horizontal polarization array element is composed of 1×4 V-shaped slots, and the vertical polarization array element is composed of 1×4 longitudinal slots. A prototype of 2×5 array is simulated. The impedance bandwidths (|S<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf>| ≤ - 15dB) of 900 MHz and 300 MHz are achieved for horizontal and vertical polarizations, respectively. The array achieves the gain of 14.5 dBi and 15 dBi for horizontal and vertical polarizations, respectively. The power capacity of 4.1 MW and 2.8 MW are obtained for horizontal and vertical polarization array elements, respectively. The proposed antenna has the advantages of dual-polarization, high power capacity, and a compact design, which can be candidate for satellite communication.