A tokamak reactor concept for steady-state operation has been studied. This reactor uses the compressional Alfvén wave to sustain the plasma current. Its structure is simplified by eliminating the poloidal coils in the torus centre. The start-up scenario is obtained by minimizing the wave and electric powers of the coils through solving the power balance and Grad-Shafranov equations. The steady-state operating point is obtained from the viewpoint of maximizing the Q-value (Q = fusion power/current drive power). The largest Q-value is obtained by using compressional Alfvén wave rather than other RF waves.