Ergül, ÖzgürGürel, Levent2016-02-082016-02-0820060379-6566http://hdl.handle.net/11693/27233Date of Conference: 6-10 November 2006Conference Name: 1st European Conference on Antennas and Propagation, EUCAP 2006Circular arrays of log-periodic (LP) antennas are designed for broadband applications. A sophisticated electromagnetic simulation environment involving integral equations and fast solvers is developed to analyze the LP arrays both accurately and efficienuy. The resulting matrix equation obtained by the discretization of the electric field integral equation is solved iteratively via the multilevel fast multipole algorithm (MLFMA). Genetic algorithms interacting with MLFMA is employed to optimize the excitations of the array elements to increase the frequency independence and also to add the beam-steering ability to the arrays.EnglishCircular antenna arraysGenetic algorithmsLog-periodic antennasMultilevel fast multipole algorithmComputer simulationElectric field effectsElectromagnetic field effectsConference Paper10.1109/EUCAP.2006.4584913