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Antennas and Propagation Magazine, IEEE

Issue 5 • Date Oct. 2007

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Displaying Results 1 - 25 of 54
  • Front cover - IEEE Antennas and Propagation Magazine - Oct. 2007

    Publication Year: 2007 , Page(s): 1
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  • Table of contents - Vol 49 No 5

    Publication Year: 2007 , Page(s): 3
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  • Information for Contributors

    Publication Year: 2007 , Page(s): 4
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  • Magazine Staff

    Publication Year: 2007 , Page(s): 5 - 6
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  • AP-S Officers and Administrative Committee

    Publication Year: 2007 , Page(s): 7
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  • Editor's Comments

    Publication Year: 2007 , Page(s): 8 - 201
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  • President's Message

    Publication Year: 2007 , Page(s): 8 - 9
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  • Online Access to AP-S Symposia When Renewing Membership

    Publication Year: 2007 , Page(s): 9
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  • 2008 IEEE International Symposium on Antennas and Propagation.....Call for Papers

    Publication Year: 2007 , Page(s): 10 - 11
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  • 2008 IEEE Antennas and Propagation Society Membership Application

    Publication Year: 2007 , Page(s): 11
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  • Nature-Based Design of Aperiodic Linear Arrays with Broadband Elements Using a Combination of Rapid Neural-Network Estimation Techniques and Genetic Algorithms

    Publication Year: 2007 , Page(s): 13 - 23
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (7438 KB) |  | HTML iconHTML  

    The developments presented in this paper address the challenge of determining the optimal element positions in nonuniformly spaced broadband phased-array antennas in order to best meet desired performance criteria. Specifically, this is accomplished by introducing a new nature-based design technique that couples a robust genetic-algorithm (GA) optimizer with rapid neural-network (NN) estimation pr... View full abstract»

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  • Near-Field Radio Holography of Large Reflector Antennas

    Publication Year: 2007 , Page(s): 24 - 41
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (11108 KB) |  | HTML iconHTML  

    We summarize the mathematical foundation of the holographic method of measuring the reflector profile of an antenna or radio telescope. In particular, we treat the case where the signal source is located at a finite distance from the antenna under test, necessitating the inclusion of the so-called Fresnel field terms in the radiation integrals. We assume a "full phase" system with reference receiv... View full abstract»

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  • Reconfigurable Fresnel-Zone-Plate-Shutter Antenna with Beam-Steering Capability

    Publication Year: 2007 , Page(s): 42 - 51
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (6420 KB) |  | HTML iconHTML  

    A reconfigurable Fresnel-zone-plate (FZP) antenna, capable of dynamic beam scanning, is introduced. The FZP consists of a series of thin metal shutters, which discretize the antenna aperture into a number of reconfigurable transparent and opaque zones. The shutters are individually controlled to focus the beam at a desired location. Beam scanning of at least +40deg from broadside with a small degr... View full abstract»

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  • The Theory of Characteristic Modes Revisited: A Contribution to the Design of Antennas for Modern Applications

    Publication Year: 2007 , Page(s): 52 - 68
    Cited by:  Papers (65)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (10534 KB) |  | HTML iconHTML  

    The objective of this paper is to summarize the work that has been developed by the authors for the last several years, in order to demonstrate that the Theory of Characteristic Modes can be used to perform a systematic design of different types of antennas. Characteristic modes are real current modes that can be computed numerically for conducting bodies of arbitrary shape. Since characteristic m... View full abstract»

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  • A Novel MoM- and SSPE-based Groundwave-Propagation Field-Strength Prediction Simulator

    Publication Year: 2007 , Page(s): 69 - 82
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (9468 KB) |  | HTML iconHTML  

    Knowledge of the local groundwave-propagation characteristics is essential in wireless systems. Although Maxwell's equations establish the theoretical background, only a limited number of highly idealized groundwave-propagation problems have mathematically exact and/or approximate solutions. Therefore, semi-analytical/numerical and pure numerical simulation methods are almost the only way to handl... View full abstract»

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  • The Electrically Small Elliptical Loop with an Oblate Spheroidal Core

    Publication Year: 2007 , Page(s): 83 - 92
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5688 KB) |  | HTML iconHTML  

    The fundamental properties of an electrically small elliptical loop wound on an oblate spheroidal core are calculated using quasi-static theory. Closed-form expressions are derived for the elements of a complete equivalent circuit, including the inductance and capacitance, and radiation, conductor, and core-loss resistances. It is shown that the bandwidth and efficiency are greatly increased by th... View full abstract»

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  • Report of the Constitution and Bylaws Committee

    Publication Year: 2007 , Page(s): 94 - 95
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  • Chapter News

    Publication Year: 2007 , Page(s): 96 - 99
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  • AP-S Distinguished Lecturer Program for 2006-2007

    Publication Year: 2007 , Page(s): 100
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  • IEEE AP-S Region 10 Chapter Chairs' Meeting

    Publication Year: 2007 , Page(s): 101 - 102
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  • XXIX General Assembly of the International Union of Radio Science Union Radio Scientifique Internationale (URSI) Call for Papers

    Publication Year: 2007 , Page(s): 104
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  • Quasi-Analytical Synthesis of Moderate and Large Arrays Radiating Arbitrary "Star-Shaped" Footprint Patterns [Antenna Designer's Notebook]

    Publication Year: 2007 , Page(s): 105 - 112
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4788 KB) |  | HTML iconHTML  

    The proposed quasi-analytical method undertakes the shaping of a desired footprint as a composition of several phi-symmetric circular Taylor patterns exhibiting flat-topped beams. The final pattern is obtained after sampling the circular aperture that is obtained for rectangular-grid planar arrays. A triangular-shaped footprint and a footprint of continental Europe, radiated by planar arrays with ... View full abstract»

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  • Correction

    Publication Year: 2007 , Page(s): 113
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (532 KB)  

    In the above title (ibid, vol. 44, issue 3, pp. 114-123, Jun 02), corrections were made to Equation 38. There were various typographical errors. View full abstract»

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  • The Fifth IASTED International Conference on Antennas, Radar, and Wave Propagation

    Publication Year: 2007 , Page(s): 114
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  • First Announcement and Call for Papers International Conference "Days on Diffraction"

    Publication Year: 2007 , Page(s): 116
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Aims & Scope

The IEEE Antennas and Propagation Magazine covers all areas relating to antenna theory, design, and practice.

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Meet Our Editors

Editor-in-Chief
Mahta Moghaddam