Abstract： Aiming at the needs of satellite transceivers, a dual-band, dual-port, dual-antenna common-aperture microstrip antenna was designed. Both antennas work in the main mode by the radiation patch loading short via technology, with the external square patch and the internal circular patch corner cutting technology. Dual antennas work in common aperture, radiating left-handed circular polarization(LHCP) and right-handed circular polarization(RHCP) waves respectively, the complexity of the satellite dual antenna layout is reduced effectively. The simulation results show that the antenna has a return loss of -13 dB at the frequency of 1.615 GHz, the 10 dB bandwidth of 50 MHz, the gain of 6 dB, the half-power beam width of 90°, and the ±60° beam axis ratio less than 3 dB；the antenna has a return loss of -18 dB at the frequency of 2.491 GHz, the 10 dB bandwidth of 40 MHz, the gain of 6 dB, the half-power beam width of 90°, and the ±60° beam axis ratio less than 3 dB；the dual-port isolation is better than 32 dB. After processing, the actual measurement results are consistent with the simulation results, and the antenna has certain guiding significance for the design of dual-band, dual-port common-aperture antennas on satellites.
Key words : common-aperture；dual-band antenna；dual-port antenna
