Journal of Systems Engineering and Electronics ›› 2014, Vol. 25 ›› Issue (4): 588-.doi: 10.1109/JSEE.2014.00069

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Multi-dimensional scattering properties diagnosis system of scale aircraft model in an anechoic chamber

Chufeng Hu1,2,*, Zhou Zhou1, Nanjing Li1,2, and Kun Zhang2   

  1. 1. National Key Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi’an 710065, China;
    2. Electronic Information Department, Northwestern Polytechnical University, Xi’an 710065, China  
  • Online:2014-08-22 Published:2010-01-03


Aiming at the concept of “diagnosis”, a simple and effective broadband radar cross section (RCS) measurement system is constructed, and some multi-dimensional scattering properties diagnosis techniques are presented based on the system. Firstly, a stepped-frequency signal is employed to achieve high range resolution, combining with a variety of signal processing techniques. Secondly, cross-range resolution is gained with a rotating table, and the high-resolution two-dimensional (2-D) imaging of the scale model is obtained by the microwave imaging theory. Finally, two receiving antennas with a small distance in altitude are used, and the three-dimensional (3-D) height distribution of scattering points on the scale model is extracted from the phase of images. Some typical bodies and a scale aircraft model are diagnosed in an anechoic chamber. The experimental results show that, after scaling with a metal sphere, the accurate onedimensional (1-D) RCS pattern of the model is obtained, and it has a large dynamic range. When the bandwidth of the transmitting signal is 4 GHz, the resolution of the 2-D image can reach to 0.037 5 m. The 3-D height distribution of scattering points is given by interferometric measurement. This paper provides a feasible way to obtain high-precision scattering properties parameters of the scale aircraft model in a conventional rectangular anechoic chamber.