In　this　work,　a　broadbanded　RF　power　amplifier　based　on　Chebyshev　filter　and　dual-band　matching　is　developed.　It　operates　within　the　range　of　3.0-4.0　GHz　in　the　S-band,　and　the　amplifier　tube　is　CGH40010F　provided　by　Cree.　The　bias　circuit　consists　of　a　filter　capacitor　and　a　low-pass　filter,　which　can　isolate　the　ac　and　de　circuits　in　a　wider　bandwidth　range;　the　input　matching　network　utilizes　the　filter　characteristics　of　the　filter　to　perform　the　impedance　transformation,　which　can　reduce　the　return　loss;　the　output　matching　network　uses　a　The　output　matching　network　uses　dual-frequency　matching,　which　can　effectively　expand　the　frequency　band.　The　bias　isolation　of　the　amplifier　is　over　100dB,　the　overall　return　loss　is　below　-10dB,　the　output　power　is　37.2dbm　at　the　1dB　compression　point,　the　power　added　efficiency　is　50%,　and　the　gain　is　12.2dB.　©　2023　IEEE.