Optically controlled re-constructible ultra wideband trapped wave antenna for cognitive radio

The utility model discloses an optically controlled re-constructible ultra wideband trapped wave antenna for cognitive radio. The antenna comprises an antenna radiation unit, a coplanar waveguide feeder line, an FR4 medium substrate, a symmetrical trapezoid floor and first, second, third, fourth and fifth optically controlled silicon switches. The antenna radiation unit, the coplanar waveguide feeder line, the symmetrical trapezoid floor and the first, second, third, fourth and fifth optically controlled silicon switches are arranged at the same side of the FR4 medium substrate. The coplanar waveguide feeder line is arranged at the middle position of the symmetrical trapezoid floor. The antenna radiation unit comprises a U-shaped monopole antenna. The U-shaped monopole antenna is connected with the coplanar waveguide feeder line. A U-shaped surface mounting monopole is internally provided with a bending symmetrical slot of which the shape is symmetrical about the coplanar waveguide feeder line. The optically