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Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna radiation patterns Languages : en Pages : 84
Book Description
A variety of techniques are described which allow the use of large array elements or sub-arrays for limited scan application. Some of these techniques are new and so are described in sufficient detail to predict their performance. Emphasis is placed mainly on the method called odd-mode-scanning; the treatment of other techniques are included to add background for evaluating this new method. (Author).
Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna radiation patterns Languages : en Pages : 84
Book Description
A variety of techniques are described which allow the use of large array elements or sub-arrays for limited scan application. Some of these techniques are new and so are described in sufficient detail to predict their performance. Emphasis is placed mainly on the method called odd-mode-scanning; the treatment of other techniques are included to add background for evaluating this new method. (Author).
Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna arrays Languages : en Pages : 24
Book Description
The report describes a new technique for producing an overlapped sub-array pattern by higher order mode coupling between nearest neighbor phased array elements. Theoretical and experimental results are compared, and practical circuits described for one plane of scan. The Appendix presents a circuit for scanning in two planes. (Author).
Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna radiation patterns Languages : en Pages : 0
Book Description
A variety of techniques are described which allow the use of large array elements or sub-arrays for limited scan application. Some of these techniques are new and so are described in sufficient detail to predict their performance. Emphasis is placed mainly on the method called odd-mode-scanning; the treatment of other techniques are included to add background for evaluating this new method. (Author)
Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna arrays Languages : en Pages : 34
Book Description
The report presents experimental data showing the limited scan capabilities of E-plane and H-plane horns and an eight-element array of E-plane horns. A theoretical discussion of scanning in two dimensions is included in the Appendix. (Author).
Author: Lore Zahn Publisher: ISBN: Category : Antenna radiation patterns Languages : en Pages : 36
Book Description
This report describes the design and testing of two types of dielectric lenses used to collimate the beam of a limited-scan array. Though intended mainly to improve the broadside radiation characteristics of the array, the experimental results show substantial improvement in the scanned array behavior attributable to the use of lenses.
Author: Robert V. McGahan Publisher: ISBN: Category : Antenna radiation patterns Languages : en Pages : 40
Book Description
Limited-scan antennas are finding increasing use in satellite communications and airport approach radars. Earlier attempts to achieve limited scan involved the use of parabolic lenses, zoning, and movable or dual-focus feeds. In the method described here, the main beam is scanned electronically by using a circular-arc phased array. The microwave lens is designed so that its back face satisfies the scanning condition. The beam is focused by shaping the front face of the lens to meet the required focusing condition and by varying the phase propagation of the lens. Two of the lenses studied were dielectric-loaded. A waveguide lens designed to scan in one dimension yielded experimental results that were good agreement with the theoretical predictions. Representative plots, and computer-generated farfield patterns of two topographically unique cases, are given.
Author: Robert J. Mailloux Publisher: Morgan & Claypool Publishers ISBN: 1598291831 Category : Technology & Engineering Languages : en Pages : 92
Book Description
Scanning arrays present the radar or communications engineer with the ultimate in antenna flexibility. They also present a multitude of new opportunities and new challenges that need to be addressed. In order to describe the needs for scanned array development, this book begins with a brief discussion of the history that led to present array antennas. This text is a compact but comprehensive treatment of the scanned array, from the underlying basis for array pattern behavior to the engineering choices leading to successful design. The book describes the scanned array in terms of radiation from apertures and wire antennas and introduces the effects resulting directly from scanning, including beam broadening, impedance mismatch and gain reduction and pattern squint and those effects of array periodicity including grating and quantization lobes and array blindness. The text also presents the engineering tools for improving pattern control and array efficiency including lattice selection, subarrray technology and pattern synthesis. Equations and figurers quantify the phenomena being described and provide the reader with the tools to tradeoff various performance features. The discussions proceed beyond the introductory material and to the state of the art in modern array design. Contents: Basic Principles and Applications of Array Antennas / Element Coupling Effects in Array Antennas / Array Pattern Synthesis / Subarray Techniques for Limited Field of View and Wide Band Applications
Author: Robert J. Mailloux Publisher: ISBN: Category : Antenna arrays Languages : en Pages : 0
Book Description
The report presents experimental data showing the limited scan capabilities of E-plane and H-plane horns and an eight-element array of E-plane horns. A theoretical discussion of scanning in two dimensions is included in the Appendix. (Author)
Author: Robert J. Mailloux Publisher: Springer Nature ISBN: 3031015347 Category : Technology & Engineering Languages : en Pages : 81
Book Description
Scanning arrays present the radar or communications engineer with the ultimate in antenna flexibility. They also present a multitude of new opportunities and new challenges that need to be addressed. In order to describe the needs for scanned array development, this book begins with a brief discussion of the history that led to present array antennas. This text is a compact but comprehensive treatment of the scanned array, from the underlying basis for array pattern behavior to the engineering choices leading to successful design. The book describes the scanned array in terms of radiation from apertures and wire antennas and introduces the effects resulting directly from scanning, including beam broadening, impedance mismatch and gain reduction and pattern squint and those effects of array periodicity including grating and quantization lobes and array blindness. The text also presents the engineering tools for improving pattern control and array efficiency including lattice selection, subarrray technology and pattern synthesis. Equations and figurers quantify the phenomena being described and provide the reader with the tools to tradeoff various performance features. The discussions proceed beyond the introductory material and to the state of the art in modern array design. Contents: Basic Principles and Applications of Array Antennas / Element Coupling Effects in Array Antennas / Array Pattern Synthesis / Subarray Techniques for Limited Field of View and Wide Band Applications
Author: Robert J. Mailloux Publisher: Artech House ISBN: 163081508X Category : Technology & Engineering Languages : en Pages : 549
Book Description
This completely revised third edition of an Artech House classic, Phased Array Antenna Handbook, Second Edition, offers an up-to-date and comprehensive treatment of array antennas and systems. This edition provides a wealth of new material, including expanded coverage of phased array and multiple beam antennas. New modern machine learning techniques used for analysis are included. Additional material on wideband antennas and wideband coverage in array antennas are incorporated in this book, including new methods, devices, and technologies that have developed since the second edition. A detailed treatment of antenna system noise, sections on antenna pattern synthesis, developments in subarray technology, and in-depth coverage of array architecture and components are additional new features of this book. The book explores design elements that demonstrate how to size an array system with speed and confidence. Moreover, this resource provides expanded coverage of systems aspects of arrays for radar and communications. Supported with numerous equations and illustrations, this practical book helps evaluate basic antenna parameters such as gain, sidelobe levels, and noise. Readers learn how to compute antenna system noise, design subarray geometries for given bandwidth, scan and sidelobe constraints, and choose array illumination tapers for given sidelobe levels.
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Lore Zahn
Author: Robert V. McGahan
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Robert J. Mailloux