A New Compact Coupled Circular Ring Band-Pass Filter Structure for ISM Band ApplicationSoufiane El Maimouni, Fouad Aytouna, Jamal Zbitou, Stéphane Ginestar and Mohammed El GibariE3S Web Conf., 680 (2025) 00030DOI: https://doi.org/10.1051/e3sconf/202568000030