IEEE Antennas and Propagation Magazine

Issue 2 • April 2004

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Displaying Results 1 - 25 of 61
  • Comment on "On the sharpness of a needle"

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (191 KB) | HTML iconHTML

    For original paper see Uslenghi ("On the sharpness of a needle" IEEE Antennas and Propagation Magazine, vol. 46, no.2, p.146-147). This comment mainly focuses on the problem of the static distribution of charge on a needle. View full abstract»

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  • On the sharpness of a needle [electromagnetic propagation]

    Publication Year: 2004, Page(s):146 - 147
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB) | HTML iconHTML

    In a recent paper [Oct. 2003], Van Bladel discussed in detail the behavior of fields and surface charges near singularities of metallic structures, such as a hollow circular cylinder, a circular cone, a thin prolate spheroid, and a uniformly charged segment. At times, the reasoning in [Van Bladel, Oct. 2003] leads to conclusions not as definitive as one might wish because of the various approximat... View full abstract»

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  • Electromagnetic compatibility

    Publication Year: 2004, Page(s):138 - 140
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB) | HTML iconHTML

    The focus of this issue's column is teaching electromagnetic compatibility. A summary of resources for this topic is found in the article by Levent Sevgi, and additional online course materials are summarized on the IEEE AP-S education course material repository Web site: www.ece.utah.edu/∼cfurse/APS/course.htm. The column also provides a set of suggestions that are applicable to a variety of ... View full abstract»

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  • "Offshoring" study misses important issues

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (190 KB) | HTML iconHTML

    An offshoring study stated the benefits to the United States of outsourcing high-wage jobs to lowest-wage countries but failed to address a number of important issues according to the IEEE-USA. According to IEEE-USA president, the report invariable fail to address the implications of offshoring on the long-term technological competitiveness and security of the United States. View full abstract»

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  • A practical millimeter-wave radar calibration target

    Publication Year: 2004, Page(s):94 - 97
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (513 KB) | HTML iconHTML

    A simple rectangular-plate millimeter-wave radar calibration target gives RCS values ranging from hundreds to thousands of square meters. This enable tests over extended ranges and with equipment having modest output power. Precise mechanical alignment mechanisms and an optical sight are mandatory, due to the narrow beamwidth. Absorber collars provide an easy way of adjusting the actual RCS accord... View full abstract»

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  • "Offshoring" contributes to high unemployment, poses serious challenges

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB) | HTML iconHTML

    Offshoring or the outsourcing of high-wage jobs from the United States to lower-wage countries contributes to high unemployment levels among the US technologists, and poses a serious, long-term challenge to the nations technological and innovative leadership, its economic vitality, and its military and homeland security, according to a position recently adopted by IEEE-USA. According to an IEEE-US... View full abstract»

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  • Hertzian dipole radiating over a lossy earth or sea: some early and late 20th-century controversies

    Publication Year: 2004, Page(s):64 - 79
    Cited by:  Papers (63)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1073 KB) | HTML iconHTML

    This paper presents a contemporary solution to the problem of radiation from a vertical Hertzian dipole over a lossy earth. Sommerfeld's 1909 solution to the problem is re-examined. It is demonstrated that a change in sign in the square root of the numerical distance is mathematically not allowed. Thus, the sign error that has been claimed in the technical literature for more than 65 years is a my... View full abstract»

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  • A note on the impedance variation with feed position of a rectangular microstrip-patch antenna

    Publication Year: 2004, Page(s):90 - 92
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    The variation with feed position of the input impedance of a rectangular patch antenna is investigated theoretically. Two different feed types are examined: an inset microstrip line, and a coaxial probe. The finite-difference time-domain (FDTD) technique is used for the calculations. Numerical results are compared with published measurements and other theoretical models. View full abstract»

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  • Chapter news

    Publication Year: 2004, Page(s):83 - 86
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  • AAES-Harris survey finds adults would be pleased if their kids chose engineering as a profession

    Publication Year: 2004, Page(s):134 - 135
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (254 KB) | HTML iconHTML

    This paper discusses the result of a Harris interactive survey, conducted on behalf of the American Association of Engineering Societies (AAES) with a grant from the United Engineering Foundation. From the survey, engineering received a higher rating from adults, whether or not they were parents, as a career choice for their children than either accounting or the ministry. Ratings for engineering ... View full abstract»

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  • In Memoriam: William D. Wood 1963-2004

    Publication Year: 2004, Page(s): 129
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    Freely Available from IEEE
  • A novel antenna concept for future solar sails: application of Fresnel antennas

    Publication Year: 2004, Page(s):50 - 63
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1077 KB) | HTML iconHTML

    Recent studies have shown that interplanetary missions may be made possible using inflatable solar sails that employ solar-flux power, providing thrust for spacecraft while reducing onboard fuel requirements. These sails require a large surface area (i.e., 100 m in diameter) to capture enough solar flux for spacecraft navigation. In this paper, a novel communication antenna concept is proposed for... View full abstract»

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  • Albumin leakage into the brain and wireless-communication radiation

    Publication Year: 2004, Page(s):154 - 156
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (358 KB) | HTML iconHTML

    A series of reports from Lund, Sweden, based on observed leakages of endogenous serum albumin in blood, suggested that repeated exposure to microwave radiation from GSM cellular telephones could alter the permeability of the blood-brain barrier at SARs that were well below the maximum permissible level for cellular telephones. While an effort to confirm had failed at SARs of 0.3-1.5 W/kg, it had c... View full abstract»

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  • Reply to "Comment on 'On the sharpness of a needle'"

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    This is a reply on the article "Comment on 'On the sharpness of a needle'" (for original paper see J.V. Bladel, IEEE Antennas and Propagation Magazine, vol. 46, no.2, p.148). The author discussed only the dynamic problem in the article but for the completeness of the solution, he now includes the static problem in this reply (for original paper see P.L.E. Uslenghi, IEEE Antennas and Propagation Ma... View full abstract»

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  • Finite Antenna Arrays and FSS [Book Review]

    Publication Year: 2004, Page(s):104 - 105
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    Freely Available from IEEE
  • Visualizing the 3D polar power patterns and excitations of planar arrays with Matlab

    Publication Year: 2004, Page(s):108 - 112
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB) | HTML iconHTML

    This paper discusses the use of Matlab to create three-dimensional polar plots of the power patterns of planar arrays together with 3D plots of the amplitudes and phases of their excitations. A few lines of Matlab M-code suffice to create complex plots. View full abstract»

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  • On the representation of a planar current distribution

    Publication Year: 2004, Page(s):46 - 49
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    A graphical technique for providing a comprehensive and intuitive representation of the current distribution on a planar antenna is introduced. The technique allows information about the magnitude, direction, polarization and relative phase of the current to be simultaneously displayed in a simple, monochromatic form, suitable for printed media. The proposed representation allows the source of pol... View full abstract»

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  • A third collection of notes has just been issued: miscellaneaus series of notes

    Publication Year: 2004, Page(s): 177
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  • Stand on standards [antenna types standards]

    Publication Year: 2004, Page(s):120 - 121
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB) | HTML iconHTML

    The IEEE Standard Definitions of Terms for Antennas (IEEE Std. 145-1993) is badly in need of updating. This standard contributes directly to the IEEE Standard Terms volume and included in the definitions listed are descriptions of antenna types. At present, many antenna types are not described, which is the reason why the author is inviting interested individuals who want to contribute to the revi... View full abstract»

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  • Distance-measurement error associated with antenna phase-center displacement in time-reference radio positioning systems

    Publication Year: 2004, Page(s):13 - 22
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (642 KB) | HTML iconHTML

    This paper presents a tutorial discussion of the effects of antenna phase-center displacement on distance determination in time-correlation radio positioning systems. A technique to determine the antenna phase-center displacement as a function of observation angle is reviewed. A simple method to determine the distance error versus observation angle, derived from the antenna phase-center displaceme... View full abstract»

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  • Reply to "Comment on 'On the sharpness of a needle"'

    Publication Year: 2004, Page(s): 148
    Request permission for commercial reuse | PDF file iconPDF (191 KB) | HTML iconHTML
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  • Information for contributors

    Publication Year: 2004, Page(s): 4
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  • Near-field magnetic communication

    Publication Year: 2004, Page(s):114 - 115
    Cited by:  Papers (46)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB) | HTML iconHTML

    Even as cell phones have shrunk in size while boasting an ever-increasing array of features, two things about them haven't changed much: they still sprout a stubby antenna and, if you want a headset, you have to put up with an unwieldy wire connecting the headset and the phone. Thanks to a patented technology called near-field magnetic communication (NFMC), from Aura Communications, one can also c... View full abstract»

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  • A near-field preconditioner and its performance in conjunction with the BiCGstab(ell) solver

    Publication Year: 2004, Page(s):23 - 30
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (530 KB) | HTML iconHTML

    This paper describes a simple physically-motivated "near-field" preconditioning scheme that is effective in accelerating convergence of surface, volume, and combined surface/volume integral equations for a broad variety of electromagnetic scattering problems. It can be easily implemented numerically in method of moment (MoM) solvers (both conventional and those employing matrix-compression techniq... View full abstract»

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  • A simulation method for bit-error-rate-performance estimation for arbitrary angle of arrival channel models

    Publication Year: 2004, Page(s):158 - 163
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (543 KB) | HTML iconHTML

    In this paper, a model for performing bit-error-rate (BER) analysis of various channel models is presented. Traditional simulation methods model the mobile radio channel as having Rayleigh fading, and are focused on the fluctuation of the amplitude of the received signal. Modern spatial models include information such as the angle of arrival of the incoming signals, the time-delay spread, and the ... View full abstract»

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