Abstract: X-band pulse compression equipment is simulated by the finite element method. The influence on resonance frequency and quality factor of some parameters, such as the length of the cavity, the width of the input iris and the location of the output coupling port, is analyzed. The study shows that the resonance frequency of the equipment can be restricted within the range of prescriptive frequency by means of adjusting the length of cavity. As the aperture width of input iris is narrowed down, SWR decreases, before reaching critical coupling, then increases, and resonance frequency also slightly rises. Quality factor is closely corrective with output leakage, which periodically varies with the distance between short circuit and H-T embranch ment midline. The optimal simulation results for the