| Stealth technology is one of national defence high-tech in the world. To reduce the Radar cross section (RCS) of the object to the greatest extent is the purpose of stealth technology. The precision estimation of RCS is very important for aerocraft stealth design. American scientist can already calculate and estimate the RCS of complex objects very accurately, it is one of important reasons for the stealth technology researching level of USA keeping ahead in the world.Wings (plane wings or missile wings) are one of the important scattering source on the aerocraft (planes or missiles). In this paper, we aim at the theory explaining of scattering mechanism and a precision calculation of RCS of wings.Loading lossy material at the front wedge and back wedge of the metal wings is an efficient method for RCS reduction. An explaintation of scattering mechanism and the precision calculation of RCS of this metal-dielectric complex wing is the subject of this paper, at the same time, the RCS calculation of dielectric coated wing, dielectric wrapped metal framework wing whole metal wing and whole dielectric wing are also resolved in this paper.In this paper, the three dimension wing models are reasonably transformed into two dimension wing models.Both the TM polarization wave and the TE polarization wave are considered in this paper.we adopt the moment of method which base on rigorous electromagnetic integral equations to solve the scattering problem . Both the volume integral equation method and the surface integral equation method are used in this paper.There are single station RCS and double station RCS situations, although the calculation time of single station RCS is far more than double RCS's, the practical value of single RCS is more than this of double RCS, so we solve both double RCS problems and single RCS problems.We hope that the work of this paper can give some help for stealth design of wings and the electromagnetism analysis of the metal-dielectric complex objects. |
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