Aiming at the technical bottleneck of the passive simulation of helicopter electromagnetic scattering characteristics and based on the structure and electromagnetic characteristics of helicopter blades, this paper proposes a novel scattering characteristics augmented technology of blades that is based on small scattering source array. The peak value, the number of peaks, the position of the peaks, and the beamwidth of mainlobe of scattering source array's Radar Cross Section (RCS) are analyzed by array synthesis formula and numerical simulation. Moreover, for the application to the rotor of a domestic unmanned helicopter, a prototype of blade augmenter is designed and tested in a microwave anechoic chamber. The experimental results are in good agreement with the simulation results, verifying the validity and feasibility of the scheme, and greatly supporting the simulation technology.
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