A Procedure to Design Feasible Dual Band Matching Networks with Minimum Complexity

Many applications in communication systems require the development of dual band matching networks. A new method to design dual band matching networks was shown, which resorts to closed form equations based on transmission line theory, and has three particular characteristics: (i) it permits the minimum number of elements (two at most three) in the network; (ii) the topology of the network is not fixed but modular; and (iii) it is able to find multiple solutions within a predefined range of feasible characteristic impedances for the elements of the network. An extensive comparison with the results shown in the literature has been reported showing the improvements introduced by the proposed method. Numerical simulations and experimental results confirm the effectiveness of the method.