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IEEE Antennas and Propagation Magazine

Issue 6 • Date Dec. 2007

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Displaying Results 1 - 25 of 65
  • Front cover - IEEE Antennas and Propagation Magazine

    Publication Year: 2007, Page(s): c1
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  • Table of contents Feature Articles

    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 - 225
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  • President's Message

    Publication Year: 2007, Page(s):8 - 10
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  • IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting - Call for Papers

    Publication Year: 2007, Page(s):11 - 12
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  • Stacked Microstrip-Patch Arrays as Alternative Feeds for Spaceborne Reflector Antennas

    Publication Year: 2007, Page(s):13 - 23
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7248 KB) | HTML iconHTML

    The feasibility of using stacked microstrip-patch arrays as feeds for offset reflector antennas is investigated in this paper. It is shown that patch arrays can be used as alternatives to the conventionally used horn feeds, which tend to be bulky. In particular, patch arrays can be of interest for spacecraft applications where reduced size and light-weight feeds are highly desirable. In this paper... View full abstract»

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  • Short-Range Ultra-Broadband Terahertz Communications: Concepts and Perspectives

    Publication Year: 2007, Page(s):24 - 39
    Cited by:  Papers (101)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (11317 KB) | HTML iconHTML

    We propose the concept of ultra-broadband terahertz communication, based on directed non-line-of-sight (NLOS) transmissions. Potential applications of such a system supporting multi-gigabit data rates are given, and put into the context of currently emerging WLANs/WPANs. The technology and propagation constraints serve as boundary conditions for the determination of the required antenna gain to su... View full abstract»

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  • Servo-Performance Parameters of the NASA Deep Space Network Antennas

    Publication Year: 2007, Page(s):40 - 46
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3794 KB) | HTML iconHTML

    The performance of an antenna control system is evaluated using performance parameters such as settling time, bandwidth, steady-state error in rate offsets, and antenna root-mean-square servo error while tracking in wind gusts. The performance parameters are measured in the field, or obtained through analysis and simulations. Limited access time to antennas, incomplete test equipment, limited test... View full abstract»

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  • Derivation of the Norton Surface Wave Using the Compensation Theorem

    Publication Year: 2007, Page(s):47 - 57
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5923 KB) | HTML iconHTML

    This paper presents a tutorial exposition of the derivation of the Norton surface wave using the compensation theorem. Only the case of a vertical electric dipole above an infinite ground plane satisfying an impedance boundary condition is treated. This is the most interesting case in practice, and the one on which applications such as MF AM broadcasting and HF surface-wave radar rely. It is attra... View full abstract»

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  • Accurate Evaluation of Magnetic- and Electric-Field Losses in Ground Systems

    Publication Year: 2007, Page(s):58 - 70
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7585 KB) | HTML iconHTML

    The efficiency of ground-based antennas is highly determined by the power dissipated in the ground plane, which can be separated into H-field and E-field losses. In this paper, a new approach is presented for the separation of ground losses that is based on Joule's law. It is theoretically valid at any frequency. Nevertheless, some simplifications can be applied in the low-and medium-frequency ban... View full abstract»

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  • Power Aspects of the Equivalent Circuit of an Antenna

    Publication Year: 2007, Page(s):71 - 78
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3628 KB) | HTML iconHTML

    The Norton equivalent circuit of a receiving antenna consists of a current generator feeding two admittances in parallel, Ya and YL. Admittance YL represents the load, and the power dissipated in YL, evaluated by "circuit" methods, correctly represents the actual electromagnetic power delivered to the load. The symbol Ya represents the input a... View full abstract»

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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): 79
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  • 2008 IEEE ANTENNAS AND PROPAGATION SOCIETY MEMBERSHIP APPLICATION

    Publication Year: 2007, Page(s): 80
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  • Chapter News

    Publication Year: 2007, Page(s):81 - 85
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  • AP-S Distinguished Lecturer Program for 2006-2007 and Distinguished Lecturers and Their Lectures

    Publication Year: 2007, Page(s): 86
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  • Keller's Cone Encountered at a Hotel

    Publication Year: 2007, Page(s):88 - 89
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1307 KB) | HTML iconHTML

    The author presents his own personal encounter with Keller's cone. View full abstract»

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  • - Announcement - 2008 Raj Mittra Travel Grants

    Publication Year: 2007, Page(s): 90
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  • The European School of Antennas: Structure, Results and Perspectives

    Publication Year: 2007, Page(s):92 - 98
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4437 KB) | HTML iconHTML

    The European School of Antennas (ESoA) is a geographically distributed nonprofit post-graduate school on antennas, propagation, and relevant applications. The ESoA courses are distributed in the most accredited European research centers of antennas and wireless systems. In the first three year of life, the ESoA courses involved about 680 students and more than 150 different teachers, mostly univer... View full abstract»

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  • Announcement and Call for Papers ISAPE2008

    Publication Year: 2007, Page(s): 100
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  • Design of Modulated End-Fire Antennas

    Publication Year: 2007, Page(s):101 - 110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4914 KB) | HTML iconHTML

    The design presented in this article is dedicated to end-fire antennas with a modulated surface-wave structure fed by a dipole or crossed dipole. For short, these are herein called modulated end-fire antennas. The studies were carried out with a modulated corrugated-rod (disks attached to a metal rod) surface-wave structure. The results obtained may be applied to other types of surface-wave struct... View full abstract»

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  • ANTEM/URSI 2008, Call for Papers

    Publication Year: 2007, Page(s): 112
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  • Characterization of Real-World Steered-Beam Antennas from Amplitude-Only Near-Field Data

    Publication Year: 2007, Page(s):113 - 122
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6617 KB) | HTML iconHTML

    Phase-less near-field techniques are becoming increasingly more important for antenna characterization, due to the growing interest in millimeter-and sub-millimeter-wave applications, where the near-field phase is difficult or even impossible to measure. In this framework, the routine application of phase-less near-field/far-field (NFFF) transformations to real-world operational antennas is a chal... View full abstract»

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IEEE Antennas and Propagation Magazine actively solicits feature articles that describe engineering activities taking place in industry, government, and universities

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Editor-in-Chief
Mahta Moghaddam