Dual-Band Single-Layer Reflectarray Antenna for LEO Satellite Communication.

A reflectarray antenna operates at the frequencies of 12 GHz and 28 GHz for low Earth orbit (LEO) satellite communication is presented in this paper. The dual-band operation achieved by the shared-aperture unit-cell designed on a single-layer substrate. Two different types of elements are employed to provide phase reflection specifically for each operating band. The antenna consists of 15×15 elements at X-band and 30×30 elements at Ka-band. The simulation results show a gain of 24.98 dBi, -16.86 dB sidelobe level (SLL) and 8.1° beamwidth was obtained at 12 GHz. Meanwhile, 32.12 dBi gain was observed at 28 GHz with -23.85 dB SLL and 3.7° beamwidth.