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IEEE Antennas and Propagation Magazine

Issue 2 • April 2004

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Displaying Results 1 - 25 of 61
  • 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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  • In Memoriam: Oswald Garrisson "Mike" Villard Jr. [1916 -2004]

    Publication Year: 2004, Page(s):117 - 118
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    Freely Available from IEEE
  • "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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  • AMTA corner

    Publication Year: 2004, Page(s):165 - 166
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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
  • 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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  • 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 (12)
    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
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  • Near-field magnetic communication

    Publication Year: 2004, Page(s):114 - 115
    Cited by:  Papers (41)  |  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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  • Chapter news

    Publication Year: 2004, Page(s):83 - 86
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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 (13)
    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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  • 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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  • Jerks at work [workplace ethics]

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB) | HTML iconHTML

    This paper discusses how to recognize jerks in the workplace. A description of the character of a jerk is given and the reasons why they usually succeed in the workplace. It also gives advice on how to deal with jerks and how to confront one if you really need to. 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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  • 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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  • 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 (55)  |  Patents (10)
    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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  • Information for contributors

    Publication Year: 2004, Page(s): 4
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  • 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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  • Stand on standards [antenna types standards]

    Publication Year: 2004, Page(s):120 - 121
    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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  • 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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  • Two-sphere interference in RCS measurements and imaging

    Publication Year: 2004, Page(s):166 - 172
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB) | HTML iconHTML

    New RCS data on two spheres in rotation are presented. From the simple geometry, the results allow us to verify both the cross-range and down-range distance scales in imaging. With the known RCS of the individual spheres, we find that it is feasible to calibrate the image RCS scale to dBsm, provided care is taken to mitigate the shadowing and sidelobe effects. 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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IEEE Antennas and Propagation Magazine actively solicits feature articles that describe engineering activities taking place in industry, government, and universities

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Mahta Moghaddam