Ultra wide-band and low-cost radiating element and antenna

The invention provides an ultra wide-band and low-cost radiating element. The radiating element is characterized by comprising a reflecting board, wherein the reflecting board adopts a regular polygonstructure with the number of sides being an even number; the sides of the reflecting board are upward bent, so that a main reflecting surface is formed; gaps are formed in diagonal positions of the reflecting board; a plurality of PCB coupled feeding panels are arranged on the reflecting board; and coupled feed lines are arranged on the PCB coupled feeding panels. The radiating element ensures that the sides of the reflecting board are directly upward bent to form the main reflecting surface, and can be machined through a mature die casting integrated molding technology or a metal plate bending technology, compared with the conventional broadband oscillator, the radiating element has the advantages of simple structure and light weight, and the manufacturing cost is low. An antenna adopting the radiating element e