Abstract: A dual-band dual-polarized array is introduced in this paper. It is a microstrip array with seven layers and has the advantages in lightweight and low profile. The dual linear polarization is realized by aperture coupling and microstrip line feeding. And the dual bands are realized by adding parasitic patch on the main patch. The operating frequencies are 12. 25 ~12. 75GHz and 14 ~14. 5GHz respectively. The isolation between the two ports is better than 40dB across the entire operating bandwidth. The measured gain is about 18dBi. This antenna can be used as subarray to fabricate large-scale dual-band dual-polarized array.