Near-field microwave imaging with a new optimization of MIMO array

The near-filed array-based imaging radar systems have been widely used in the field of concealed weapon detection, medical imaging, etc. However, conventional systems always require a large number of antenna elements. Both the cost and complexity of the systems are increased. This paper refers to the convolution principle and introduces an optimization method for near-filed MIMO array. And the back-projection (BP) algorithm is used to the near-field MIMO imaging, which can focus any array configurations. Simulations are provided to demonstrate the performance of the proposed method, which proves that it is an effective way to solve the near-field sparse array imaging problem.