Representations of electric field between two inclined conductor boards

The formulation E=U/d is traditionally used in the measurement of a GTEM cell, which is derived from two parallel boards capacitor. However, the basic structure of a GTEM cell is two inclined conductor boards. More accurate formulation is required and is mentioned in several papers. In this paper calculation formulation is deduced after investigating three models of inclined conductor boards and these results are compared with the result of the formulation E=U/d.