Directional coupler applied to multi-beam antenna feed network

The invention is applicable to the technical field of communication equipment, and provides a directional coupler applied to a multi-beam antenna feed network. The directional coupler comprises a first microstrip line structure, a second microstrip line structure and a middle-layer dielectric substrate. The first microstrip line structure, the middle-layer dielectric substrate and the second microstrip line structure are sequentially pressed and fixed up and down. A first coupling line of the first microstrip line structure is disposed on the top layer of the middle-layer dielectric substrate.A second coupling line of the second microstrip line structure is disposed at the bottom layer of the middle-layer dielectric substrate. Therefore, the directional coupler can realize 90-degree phaseshift, reduce standing waves to achieve good transmission performance, and is well applied to a multi-beam feed network. 本发明适用于通信设备技术领域，提供了一种应用于多波束天线馈电网络的定向耦合器，包括有第一微带线结构、第二微带线结构以及中层介质基板，所述第一微带线结构、所述中层介质基板以及所述第二微带线结构依次上下压合固定，