in this paper, a traveling wave deflection deflector (twd) with a slow-wave property induced by a microstrip transmission line is proposed for femtosecond streak cameras. the pass width and dispersion properties were simulated. in addition, the dynamic temporal resolution of the femtosecond camera was simulated by cst software. the results showed that with the proposed twd a femtosecond streak camera can achieve a dynamic temporal resolution of less than 600 fs. experiments were done to test the femtosecond streak camera, and an 800 fs dynamic temporal resolution was obtained. guidance is provided for optimizing a femtosecond streak camera to obtain higher temporal resolution.