Design and Analysis of Low Frequency Passive Scattering Echo Intensifier

This paper is a design and analysis of a low-frequency passive scattering echo enhancer. The method of how to realize the scattering enhancement of small targets in the low frequency band is described. Based on the resonant frequency of the planar spiral inductor and the calculation formula of the target radar cross section(RCS), the planar spiral coil can be analogous to a circuit composed of capacitor and inductor coil, the outer frame in the structure diagram is analogous to a parallel circuit, the inner spiral is analogous to a series circuit, through the analysis and calculation of the circuit, find out the operating frequency of the antenna under the joint action of capacitor and inductor coil, this is the resonant frequency of the structure, define the resonant frequency is the planar spiral The resonant frequency is defined as the frequency of the maximum scattered echo in the low frequency band of the planar spiral enhancer, so as to achieve a large RCS value for a small target, and finally, the electromagnetic simulation and calculation of the target are verified as reasonable by the FEKO simulation platform.