Improving the angle accuracy of the RFSS based on multiple-radiating-unit array

The radio frequency simulation system (RFSS) is important for the research and development of the airborne radio frequency electronics system, and it is difficult to improve the angle accuracy of the RFSS with conventional three-radiating-unit array. The method of improving the angle accuracy of the RFSS by using the multiple-radiating-unit array instead of the conventional three-radiating-unit array. Comparing with the conventional three-radiating-unit array, the amplitudes of the units in the multiple-radiating-unit array cannot be determined only by the locations of the target and the units. Therefore, the optimization model is built to minimize the angle error. With the result of the optimized amplitudes, the expression of the angle error is given for the multiple-radiating-unit array. Based on the numerical computation results, it can be seen that the angle error of the multiple-radiating-unit array is decreased obviously compared with that of the conventional three-radiating-unit array. It is significant for the improvement of the angle accuracy of the RFSS further.