Mermoul, AliHocine, KenzaChallal, M. (Supervisor)2023-01-082023-01-082016https://dspace.univ-boumerdes.dz/handle/123456789/1074045p.In this work, three new different microstrip dual-band bandpass filters (BPFs) operating at (2.1 GHz, 5.1 GHz), (1.6 GHz, 5.15 GHz) and (2.45 GHz, 5.5 GHz) for 3G, Wi-Fi, WLAN and satellite communications are investigated and realized. The three filters are obtained from modified second order hairpin filter. The proposed filters present satisfactory performances and meet the requirements of modern wireless communication systems. The substrate material used for all designs is FR4 with a thickness of 1.62 mm, a relative dielectric constant of 4.3 and a dielectric tangent loss of 0.0017.enDual-band bandpass filterSecond order hairpin filterThesis