Scattering Cross Section of Unequal Length Dipole Arrays (eBook)

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2015 | 1st ed. 2016
XIX, 43 Seiten
Springer Singapore (Verlag)
978-981-287-790-1 (ISBN)

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Scattering Cross Section of Unequal Length Dipole Arrays -  Rakesh Mohan Jha,  Hema Singh,  H. L. Sneha
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This book presents a detailed and systematic analytical treatment of scattering by an arbitrary dipole array configuration with unequal-length dipoles, different inter-element spacing and load impedance. It provides a physical interpretation of the scattering phenomena within the phased array system. The antenna radar cross section (RCS) depends on the field scattered by the antenna towards the receiver. It has two components, viz. structural RCS and antenna mode RCS. The latter component dominates the former, especially if the antenna is mounted on a low observable platform. The reduction in the scattering due to the presence of antennas on the surface is one of the concerns towards stealth technology. In order to achieve this objective, a detailed and accurate analysis of antenna mode scattering is required. In practical phased array, one cannot ignore the finite dimensions of antenna elements, coupling effect and the role of feed network while estimating the antenna RCS. This book presents the RCS estimation of an array with unequal-length dipoles. The signal reflections within the antenna system and the mutual coupling effect are considered to arrive at the total RCS for series and parallel feed. The computations are valid for any arbitrary array configurations, including side-by-side arrangement, parallel-in-echelon, etc.


This book presents a detailed and systematic analytical treatment of scattering by an arbitrary dipole array configuration with unequal-length dipoles, different inter-element spacing and load impedance. It provides a physical interpretation of the scattering phenomena within the phased array system. The antenna radar cross section (RCS) depends on the field scattered by the antenna towards the receiver. It has two components, viz. structural RCS and antenna mode RCS. The latter component dominates the former, especially if the antenna is mounted on a low observable platform. The reduction in the scattering due to the presence of antennas on the surface is one of the concerns towards stealth technology. In order to achieve this objective, a detailed and accurate analysis of antenna mode scattering is required. In practical phased array, one cannot ignore the finite dimensions of antenna elements, coupling effect and the role of feed network while estimating the antenna RCS. This book presents the RCS estimation of an array with unequal-length dipoles. The signal reflections within the antenna system and the mutual coupling effect are considered to arrive at the total RCS for series and parallel feed. The computations are valid for any arbitrary array configurations, including side-by-side arrangement, parallel-in-echelon, etc.

Preface 8
Acknowledgments 9
Contents 10
About the Authors 11
List of Figures 13
List of Tables 15
1 Scattering Cross Section of Unequal Length Dipole Arrays 16
Abstract 16
1 Introduction 16
2 Formulation for the RCS of Dipole Array 18
2.1 Reflection at the Dipole Terminals 21
2.2 Reflection at the Terminals of Extra Component 25
2.3 Reflection at the Phase-Shifters 25
2.4 Reflection at the Coupler Ports 26
2.4.1 Signal Reflection at the Input Port(s) of the Couplers Connected to Phase-Shifters 26
2.4.2 Signal Reflection at Other Coupler Ports 26
3 Results and Discussion 31
3.1 RCS Estimation of Series-Fed Dipole Array 31
3.1.1 Equal-Length Dipole Array 31
3.1.2 Unequal-Length Dipole Array 33
3.1.3 Role of Mutual Coupling Effect in RCS Estimation of Unequal Length Dipole Array 33
3.1.4 Effect of Terminal Impedance on RCS of Unequal-Length Dipole Array Including Mutual Coupling Effect 36
3.2 RCS Estimation of Parallel-Fed Dipole Array 39
3.2.1 Equal-Length Dipole Array 39
3.2.2 Unequal-Length Dipole Array 39
3.2.3 Mutual Coupling Effect in Unequal-Length Dipole Array with Parallel Feed Network 42
3.2.4 Role of Terminating Impedance on RCS of Unequal-Length 47
4 Conclusion 52
References 52
About the Book 54
Author Index 55
Subject Index 56

Erscheint lt. Verlag 28.9.2015
Reihe/Serie SpringerBriefs in Computational Electromagnetics
SpringerBriefs in Electrical and Computer Engineering
Zusatzinfo XIX, 43 p. 26 illus.
Verlagsort Singapore
Sprache englisch
Themenwelt Naturwissenschaften Physik / Astronomie
Technik Elektrotechnik / Energietechnik
Technik Nachrichtentechnik
Schlagworte Design parameters of antenna arrays • Dipole phased array • Electromagnetic Propagation • Mutual coupling in antennas • Radar Cross Section
ISBN-10 981-287-790-8 / 9812877908
ISBN-13 978-981-287-790-1 / 9789812877901
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