Abstract: Based on the theories of radial waveguide power combining, coaxial transmission line power combining, and coupled feed principles, a power combiner was designed utilizing HFSS software. This combiner operates in the frequency range of 1 GHz to 2 GHz. By applying the Chebyshev impedance transformation principle, a hybrid approach combining stepped impedance transformation with tapered impedance transformation was implemented, resulting in a broader operational bandwidth and a smoother power response curve. Simulation results indicate that the return loss is better than –16.5 dB across the operating band, with the majority of frequencies exhibiting a return loss better than –20 dB. The combining loss is less than 0.2 dB, while the isolation between ports remains below –10 dB throughout the operating frequency range. The peak power handling capability exceeds 5 kW. The designed power combiner demonstrates characteristics such as wide bandwidth, low loss, high amplitude-phase consistency, and high power tolerance.