EAN: 9789812878137

SPRINGERBRIEFS IN ELECTRICAL AND COMPUTER ENGIN...

This book focuses on determination of scattering of parallel-fed planar dipole arrays in terms
of reflection and transmission coefficients at different levels of the array system. In
aerospace vehicles  the phased arrays are often in planar configuration. The radar cross
section (RCS) of the vehicle is mainly due to its structure and the antennas mounted over it.
There can be situation when the signatures due to antennas dominate over the structural RCS of
the platform. This necessitates the study towards the reduction and control of antenna  array
RCS. The planar dipole array is considered as a stacked linear dipole array. A systematic 
step-by-step approach is used to determine the RCS pattern including the finite dimensions of
dipole antenna elements. The mutual impedance between the dipole elements for planar
configuration is determined. The scattering till second-level of couplers in parallel feed
network is taken into account. The phase shifters are modelled as delay line. All the couplers
in the feed network are assumed to be four port devices. It is shown that the array RCS can be
reduced considerably for a low observable platform by an optimization of array design
parameters even in the presence of mutual coupling. This book presents a systematic
step-by-step analytical formulation for RCS of planar half-wavelength centre-fed dipole arrays
through various schematics and illustrations. The analytical description and analysis provided
in this book should be useful for students  researchers  and design engineers of phased arrays.

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