[IEEE 2017 XXIInd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED) - Dnipro (2017.9.25-2017.9.28)] 2017 XXIInd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED) - Scattering and absorption performance of a microsize graphene-based parabolic reflector in the THz range illuminated by a complex line source