Mode coupling broadband patch antenna with cross structure

The invention discloses a mode coupling broadband patch antenna with a cross structure, which is provided with three metal layers, namely a radiation layer, a middle layer and an input layer, and three dielectric layers, and comprises the radiation layer (1), the middle layer (2) and the input layer (3) which are sequentially arranged from top to bottom, an upper dielectric layer (4) is arranged between the radiation layer (1) and the middle layer (2), and a lower dielectric layer (5) is arranged between the middle layer (2) and the input layer (3). A bonding layer (5) and a lower dielectric layer (6) are arranged between the middle layer (2) and the input layer (3), a metalized via hole (8) penetrating through the upper dielectric layer (4) is formed between the radiation layer (1) and the middle layer (2), and a gap (7) is formed in the middle layer (2); compared with a traditional patch antenna, the antenna provided by the invention can effectively obtain a wider bandwidth, and is suitable for a frequency