ANALYSIS AND DESIGN OF FEEDING STRUCTURES FOR MICROSTRIP LEAKY-WAVE ANTENNA

Three arrangements of the feeding structure for the excitation of a mi crostrip leaky wave antenna are proposed and investigated in this pape r, A full-wave spectral domain integral equation method combined with the fundamental mode sampling technique is applied to determine the re flection coefficient of the excitation source. Tabulation technique is used to reduce the computational effort. Dependence on structural par ameters such as line width, line spacing and overlap length is fully a nalyzed to obtain the design criteria for a microstrip leaky wave ante nna. Additionally, an experimental setup is used to check the validity of our numerical results and verify the radiation nature of the micro strip line first higher-order mode.