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In this paper, a fully automatic goal-oriented hp-adaptive\udfinite element strategy for open region electromagnetic problems (radiation and scattering) is presented. The methodology leads to exponential rates of convergence in terms of an upper bound of an user-prescribed quantity of interest. Thus, the adaptivity may be guided to provide an optimal error, not globally for the field in the whole finite element domain, but for specific parameters of engineering interest. For instance, the error on the numerical computation of the S-parameters of an antenna array, the field radiated by an antenna, or the Radar\ud Cross Section on given directions, can be minimized. The efficiency of the approach is illustrated with several numerical simulations with two dimensional problem domains. Results include the comparison with the previously developed energy-norm based hp-adaptivity

GOAL-ORIENTED SELF-ADAPTIVE HP-STRATEGIES FOR FINITE ELEMENT ANALYSIS OF ELECTROMAGNETIC SCATTERING AND RADIATION PROBLEMS