Evolutionary design of a wide-band twisted dipole antenna for X-band application

A novel dipole antenna at X-band with wide-band operation is presented in this paper. A wire structure model with two centrosymmetric arms used for evolutionary design is proposed, which can be encoded using a vector of real-valued parameters for evolutionary algorithms to optimize. Differential evolution is used to solve the antenna problem, and the results we get show good performance: bandwidth larger than 4.5GHz and peak gain above 8dBi over the bandwidth. Compared with the antenna designed by a state-of-the-art conventional method we referenced, which has a bandwidth about 2.5GHz with peak gain around 7dBi, the evolved antenna shows significant improvements.