A Broadband Dual-Polarized C-/Ku-Band Shared Aperture Antenna Array for Satellite Communications

At present, satellite communication has the problem of multiple communication bands and limited satellite space. Therefore, based on the shared aperture array technology, this communication proposes a shared aperture array operating in the C-/Ku-band, which solves the problem of multiple communication bands and large antenna footprint for multiple separate bands with a very wide operating frequency band and a very high aperture reuse rate. The design is based on a magnetoelectric (ME) dipole antenna, which integrates four Vivaldi antennas in the dipole arms through deformation, and a low-pass filter is designed to further improve the isolation between the C- and Ku-bands. Finally, a small antenna array is designed, with a bandwidth of 67.7% (4–8.6 GHz) for the ME dipole array and a bandwidth of 50% (12–20 GHz) for the Vivaldi antenna.