Broadband grid antenna array

The invention discloses a broadband grid antenna array. The broadband grid antenna array comprises a reflection floor and a plurality of radiating elements uprightly arranged on the reflection floor, wherein a plurality of micro strip transmission lines respectively connected with all the radiating elements are arranged on the upper layer of the reflection floor, the plurality of the radiating elements on the reflection floor form a grid antenna array in surrounding mode, radiation patches cover the obverse side and the reverse side of each radiating element, a section of each radiation patch, located on the lower portion of each of the obverse side and the reverse side of each radiating element, is corroded so as to expose a medium portion, metal slices are respectively pasted at the left end and the right end of each exposed medium portion, the metal slices are respectively connected with the radiation patches and the micro strip transmission lines, a plurality of via holes are formed in the periphery of each radiating element, and the plurality of the via holes penetrate through the radiation patches on the obverse sides and the reverse sides of each radiating element. The broadband grid antenna array is provided with a simple feed network, has the advantages of being large in bandwidth, easy to process, low in cost and the like, and can meet requirements of a broadband communication system.