Journal of Systems Engineering and Electronics

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Application of DFT in bi-static RCS calculation of complex electrically large targets

Kuisong Zheng1,*, Tengjiang Ding1, Hui Yu1, and Zhaoguo Hou2   

  1. 1. School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China;
    2. Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China
  • Online:2015-08-25 Published:2010-01-03


To handle the electromagnetic problems of the bi-static radar cross section (RCS) calculation of scatterer in a wide frequency band, a finite-difference time-domain (FDTD) extrapolation method combining with discrete Fourier transform (DFT) is proposed. By comparing the formulas between the steady state field extrapolation method and the transient field extrapolation method, a novel extrapolation method combining with DFT used in FDTD is proposed when a transient field incident wave is introduced. With the proposed method, the full-angle RCS distribution in a wide frequency band can be achieved through one-time FDTD calculation. Afterwards, the back-scattering RCS distributions of a double olive body and a sphere-cone body are calculated. Numerical results
verify the validity of the proposed method.