| A radiating array consisting of Longitudinal, centered slots, excited by objects inside the waveguide have several advantages that makes it attractive for the broadcast industry. This dissertation analyses a waveguide with a slot in the center of its broad wall, excited by a tuning screw. The waveguide can be made to radiate at different channels and with different elevation patterns. Parameters of the analysis are post position and penetration and slot position and length.; We present a Method of Moments analysis of such a unit element, consisting of screw and slot, and of two unit elements, including their mutual coupling. Also, a fast and accurate analysis of a truncated post is presented.; The results are presented in the form of scattering matrices and the data are compared to the widely used finite element code HFSS. The post/slot combination is shown to be equivalent to a shunt element on a transmission line. In comparison with all available commercial software, it is found that our Method of Moments code is fast, accurate and efficient. It requires only normally available hardware and runs in a matter of minutes. The complete radiation pattern of an eight element array is shown. |
