In-band scattering reduction structure based on four-dimensional antenna array and control method of in-band scattering reduction structure

Abstract

The invention belongs to the technical field of antenna engineering, and discloses an in-band scattering reduction structure based on a four-dimensional antenna array and a control method of the in-band scattering reduction structure . The rear end of each unit port of an antenna is sequentially connected with a four-dimensional T/R assembly, a coaxial line with the characteristic impedance of 50 ohms and a broadband load, wherein the four-dimensional T/R assembly comprises a radio frequency switch, a phase shifter and an attenuator. By optimizing the time sequence of the switch connected with each unit, the mode item scattering of the antenna is dynamically regulated and controlled, so that the total scattering field of the antenna is periodically changed, and the total scattering field of the array is estimated by using a method of unit RCS * array scattering array factors. According to the Fourier series theory, the RCS of the center frequency is partially transferred to a sideband, so that in-band RCS reduction is realized. According to the invention, the time-dimensional degree of freedom of the four-dimensional antenna array is fully utilized, so that the RCS of the antenna is jointly distributed in a space domain and a frequency domain, and compared with a traditional phased array, the phased array has a remarkable RCS reduction effect.

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