A synthesis process for the optimization of the radiation properties of microstrip antennas

A process which allows a synthesis of determined radiation conditions for optimization of the outer contour of a microstrip antenna is presented. The radiation is analytically calculable for simple antenna shapes and defined mode relations on the microstrip antenna. If the antenna shape is more complex, it is necessary to make a selection among expensive analytical methods. It is shown that most of existing analysis methods cannot be used in the synthesis, on acccount of the length of required computing time. The combintation process used, resulting from segmentation and desegmentation methods, is presented. It allows an analysis of microstrip antennas of complex form, with a low computing time cost. A complex relative permittivity is introduced for the examination of ohmic and dielectric losses. Radiation losses are examined by a fictitious external network of real resistances.