Optimization framework on antenna arrays for near field multifocusing

This paper presents a new method for focusing on multiple targets simultaneously using antenna arrays. An optimization framework based on the Levenberg-Marquardt algorithm is used to concentrate the radiated field at certain positions. The proposed synthesis technique is a flexible method that can optimize different sets of parameters in the array, i.e., the weights (phase and/or magnitude) of the elements, their positions or all these features, in order to achieve this goal. Some illustrative examples using simulated and implemented antennas are addressed to evaluate this framework.