Abstract:A parametric control method based on Matlab is studied. GRASP9 simulation interface is called by Matlab program, and the antenna electric performances of millimeter and sub-millimeter wave radiometer are batch processed. Taking the installation error of quasi optical feed network in principled sample machine as an example, the main beam efficiency is analyzed by the displacement and angle deviation of ellipsoidal mirror. Under the displacement deviation within 0.5 mm and angular deviation within 0.4°, the main efficiency can meet 90% of the indicators requirements or more. The theoretical calculation results are in good agreement to the test results, which verifies the effectiveness of the parameters control.