Capozzoli, A.; Curcio, C.; D’Elia, G.; Liseno, A. (Dipartimento di Ingegneria Biomedica, Elettronica e delle Telecomunicazioni, Università di Napoli Federico II,via Claudio 21, 80125 Napoli, Italy)
Bresciani, D.; Legay, H. (Thales Alenia Space, 26 Av. Jean François Champollion, BP 1187, 31037 Toulouse Cedex 1, France)
When designing conformal/faceted reflectarrays, the non planar geometry prevents the use of canonical Fast Fourier Transform (FFT) algorithms so that the computational complexity required by Phase-Only Synthesis techniques can become prohibitive for the large antennas normally exploited in satellite applications. In this paper, a new approach, based on the use of a proper approximation of the far field pattern expression, is presented. The method allows a massive use of FFTs, along with advanced FFT algorithms, known as FFTW, capable to adapt their performance to the hardware platform. The results for a faceted shaped-beam reflectarray providing the Galaxy 17 coverage are reported.