This paper introduces a Miniaturized Broadband compact antenna test range (CATR). In order to eliminate the influence of edge diffracted waves on the performance of the quiet zone (QZ), the rolled edges of the reflector are studied, and the designed single-reflector CATR is simulated and processed. The results show that in the frequency band of 24–50 GHz, the amplitude (phase) ripple in the QZ is 27 dB, and the QZ utilization of CATR can exceed 50%. All these show that the designed CATR system has a good QZ performance and can meet the industrial design standards.