Biobjective Hybrid Evolutionary Algorithm Applied to Resonator Filters of Arbitrary Topology

This paper presents a hybrid evolutionary algorithm to synthesize the resonator filters of an arbitrary topology. In this approach the structure space is explored concerning predefined small building-blocks having specific functionalities (resonator or coupling) and rules for structural restrictions. The method used 2D representation, proposing new strong genetic operators and combining a biobjective evolutionary algorithm to evolve topologies and local search to improve the circuit parameters. The results showed that the proposed method generates, with small populations and few generations, small well-structured circuits which accomplish the specifications. Two examples using building-blocks with elements R/L/C are presented and the characteristics were consistent with those circuits obtained by the conventional approach.