Active Radar Cross Section Reduction: Theory and by Hema Singh, Rakesh Mohan Jha

By Hema Singh, Rakesh Mohan Jha

This publication discusses the lively and passive radar pass part (RCS) estimation and methods to check the low observable aerospace systems. It starts with the basics of RCS, through the dielectric, magnetic and metamaterials parameters of the constituent fabrics after which explains numerous equipment and the rising traits during this zone of research. The RCS estimation of phased array together with the mutual coupling impression can also be offered intimately within the ebook. The energetic RCS relief is punctiliously touched upon throughout the functionality of phased arrays, sidelobe cancellers and mitigation of multipath influence. offering details on numerous adaptive algorithms like least suggest sq. (LMS), recursive least sq. (RLS) and weighted least sq. algorithms, the authors additionally point out the hot advancements within the zone of embedded antennas, conformal load bearing antenna, metamaterials and frequency selective floor (FSS) established RCS aid.

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Reflections from other directions become significant only when the specular reflections are suppressed or eliminated. g. dihedrals, trihedrals). The main intention is to redirect the reflected waves in nonspecular directions, thereby minimising the backscattering (Lynch 2004). g. ). If the nose of the missile could be made round instead of pointed, the specular reflections would be reduced considerably. Another example is the engine inlets. If the shape of the intake duct is made curved, then reflections from the inside walls of the inlet and the engine can be reduced.

The direct ray, and all the reflected, double reflected, diffracted, reflecteddiffracted, surface wave, and creeping waves are taken into account. In free space, the principles of geometrical optics (GO) are employed. A complex field represents the amplitude and the direction of the wave. Ray tracing is essentially the determination of exact location of the reflection, launching and shedding points on the surface. The field associated with the ray at the receiving point is determined by coherent summation of each individual contribution of these ray-paths.

Chapter 5 describes the mutual coupling effect in dipole arrays with different configurations. The dependence of output signal-to-noise ratio (SNR) on the mutual coupling effect is presented for different dipole arrays. The effect of parameters such as inter-element spacing, dipole length, geometric arrangement (side-by-side, parallelin-echelon), etc. on mutual impedance and SNR is discussed. This mutual coupling must be included into the RCS estimation of a dipole array. Chapter 6 describes the formulation of RCS of a dipole array with series and parallel feed network including mutual coupling effect.

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