Agradecimentos: Diego and Luiz dedicate this paper to Marcelo, who supervised the work. Marcelo passed away in July 2023, leaving a lasting impact on his family and colleagues. This research was financed by the Brazilian ROTA 2030 Program, through the Fundação de Desenvolvimento da Pesquisa - Fundep Rota 2030 / Linha V Project No. 43. Diego and Luiz dedicate this paper to Marcelo, who supervised the work. Marcelo passed away in July 2023, leaving a lasting impact on his family and colleagues. This research was financed by the Brazilian ROTA 2030 Program, through the Fundação de Desenvolvimento da Pesquisa - Fundep Rota 2030 / Linha V Project No. 43 Ver menos

Abstract: Frequency-Selective Surfaces (FSSs) are a promising tool for dealing with electromagnetic compatibility challenges in smart cities. While FSS prototypes demand a small investment, their characterization usually involves expensive radio frequency generators and analyzers. Here, we propose an FSS characterization setup based on Soft Defined Radio (SDR) technology as a low-cost alternative. To experimentally validate the proposed configuration, we employed it to characterize an example FSS in the 2.4 GHz band, comparing the results with those obtained using a signal generator and a spectrum analyzer. The setups provided a comparable performance, with maximum and mean squared transmission differences below 2 dB and 0.5 dB, respectively. Although slower and less sensitive, the SDR setup is portable and almost 50 times cheaper Ver menos