Light-control reconfigurable antenna used for cognitive radio

The utility model discloses a light-control reconfigurable antenna used for cognitive radio. The antenna comprises an antenna radiation unit, a first coplanar waveguide feed line, a second coplanar waveguide feed line, a medium substrate and a symmetric trapezoid floor. The antenna radiation unit, the first coplanar waveguide feed line, the second coplanar waveguide feed line and the symmetric trapezoid floor are etched in a same side of the medium substrate. The first coplanar waveguide feed line is located at an intermediate position of the symmetric trapezoid floor. The antenna radiation unit comprises a U-shaped paster monopole. The U-shaped paster monopole is connected to the first coplanar waveguide feed line. An internal portion of the U-shaped paster monopole is provided with two open loop circle pasters which are a first open loop circle paster and a second open loop circle paster. The first open loop circle paster is connected to the second coplanar waveguide feed line. The antenna possesses the fol