This paper presents a heuristic UTD corner diffraction for an antenna problem. The proposed heuristic UTD corner diffraction coefficient and slope diffraction are developed from the original UTD solution. This proposed solution can deal with a finite size perfect electric conductor (PEC) configuration including edges and corners for any antenna problem. A half wavelength dipole above a square PEC patch is used to be a case study in the paper. It is found that the numerical result from the proposed UTD agrees well with the simulation result from CST computer software. However, there are some discrepancies discontinuity at 90 degrees. It is in progress work to fix this problem.
