Abstract:An analysis and design theory of an aperture-coupled cavity-fed back-to-back microstrip directional coupler is presented for efficient and optimized design. For this purpose, an equivalent network is developed, and a simple yet accurate circuit element value calculation is described. Design equations of the coupler are derived based on the equivalent circuit. To determine various structural design parameters, the evolutionary hybrid optimization method based on a genetic algorithm and the Nelder-Mead method is… Show more
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