Disclosed is a multi-band antenna architecture, provided in a matrix of a wireless communication device, including: a first antenna, typically an LTE antenna, located in left outer side and right outer side areas of the matrix, a second antenna, typically a Sub-6 GHz MIMO antenna, located in upper outer side and lower outer side areas of the matrix, and a third antenna, typically a millimeter-wave antenna, located in left inner side and right inner side areas of the matrix. The above-mentioned areas are spaced from each other. The first antenna, the second antenna, and the third antenna work at different frequency bands. The third antenna can implement broadband and large-angle beam scanning.