Could not understand..can you please rephrase it.
:!: :idea: :?:
In design of microstrip patch, infinite ground plane is always assumed, and in measurement a quasi-infinite ground plane is used. But in some cases, such as antenna in handset, the dimension of ground can compare with radiation patch, so there may be some power/field will diffracte from the radiation to the below of ground plane(such case may be calculated by GTD method(Geometrical Theory of Diffraction)). Ok, so i want to know how much power can diffract to below ground, and how to perform of the field in azimuth plane(parallel to ground)(Because in the case of infinite ground, tangential electric field on ground plane will be diminished, but for small ground it will not be. So i am interested in the radiation pattern in parrallel to ground).
in some antenna design, small ground was used. So is it possible that a pole plane of gain or radiation patter will be produce at the azimuth plane of ground plane. For GTD, some field will deflect to below ground, so i wonder the field at the azimuth plane theta=90 will not be a pole. Is it right?