Optimization of Directive Gain of Two Impedance Monopoles Located on Metal Rectangular Screen

On the base of the solving of the 3-D vector problem of diffraction of the fields of two impedance monopoles located on a perfectly conducting rectangular screen the fast active software for calculating directive gain in the maximum radiation Dmax of two impedance monopoles are developed. There have been used the uniform asymptotics for diffracted fields with account the secondary diffraction on the screen edges and the asymptotic for electric current of a thin impedance dipole of finite length located in free space. The directive gain is investigated vs. the distance between the monopoles, the size L and screen sides ratio W/L. It is shown that at the found optimal distance between the monopoles 0.65λ and optimal screen sizes the directive gain can be increased three times in comparison with the minimum value Dmax. in a given range of screen sizes.