To meet the requirements of miniaturization, low profile, polarization switching, and wide-angle scanning for satellite communication receiving terminals, a novel K-band antenna array is designed. Switchable circular polarization is synthesized in the magneto-electric dipole antenna element through dual linear polarizations. By constructing a double-layer patch, uniformly distributed metallic vias, and "П" shaped orthogonal grounded feeding structure, it attains 20% relative bandwidth with less than -22 dB isolation. The element maintains stable wide-beam radiation patterns across the entire frequency band, exhibiting an Axial Ratio(AR) below 3 dB within ±65° beam coverage. An 8×8 antenna array is constructed by integrating the antenna unit with a multi-stage sequential rotation feeding technique. Simulation results demonstrate that within a scanning range of ±60°, the K-band array achieves a gain exceeding 17.8 dBic and an AR below 3.6 dB, indicating excellent circular polarization beam scanning capability. The antenna array features a compact structure and lightweight design, making it suitable for mobile millimeter-wave satellite communication receiving terminals.