Affiliations: [a] Department of Electronics Engineering, Anna
University, Chennai, Tamilnadu, India | [b] Combat Vehicles Research and Development
Establishment, Avadi, Chennai, India
Correspondence:
[*]
Corresponding author: Ganesh Madhan Muthu, Department of
Electronics Engineering, Anna University, MIT Campus, Chennai 600 044, India.
E-mail: [email protected]
Abstract: Radar Cross Section (RCS) computation and analysis are carried out
for a high speed, kinetic energy missile at 35 GHz. The radar cross section
simulations were performed under bistatic conditions, using a 3D
Electromagnetic field solver. RCS values for standard geometries such as
cylinder, cone – cylinder combination are calculated under different
excitation conditions and the results are verified with literature, so as to
fix the settings in the solver. A maximum RCS value for the missile is obtained
as −4.9 dBsm under broad side excitation. RCS values of
−22.25 dBsm and 4.94 dBsm are obtained for
0° (Nose cone) and 180° direction, when excited in the frontal region, i.e.,
0° azimuth and 0°
elevation. Further, monostatic simulation under 0° to
180° excitation shows a large RCS value of
−4 dBsm at 90°, corresponding to
large surface area of the missile. The effect of frequency on the RCS of the
missile is also determined in 30 to 40 GHz band. A comparison of integral
equation solver and asymptotic solver for RCS computation indicates almost
similar values, with a deviation less than 5 dB in most of the ranges. However,
with compromise on accuracy, the asymptotic solver is found to consume only
5% of the total time required by integral equation solver.
Keywords: Radar cross section, electromagnetic field solver, kinetic energy missile, Ka band, active protection system
