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IEEE Antennas and Propagation Magazine

Issue 4 • Date Aug. 2001

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Displaying Results 1 - 15 of 15
  • Frontiers in electromagnetics [Book Review]

    Publication Year: 2001, Page(s):96 - 97
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    Freely Available from IEEE
  • In memory of Bob Knecht

    Publication Year: 2001, Page(s):120 - 121
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    Freely Available from IEEE
  • Intellectual property and patent abstracts

    Publication Year: 2001, Page(s):148 - 154
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    Freely Available from IEEE
  • The structure of the electromagnetic field as derived from first principles

    Publication Year: 2001, Page(s):64 - 79
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1304 KB) | HTML iconHTML

    The physical origin of the coupling between the electromagnetic field and electrically charged particles is rooted in quantum physics, and is thus not directly accessible to classical electrodynamics. We provide a physical discussion of the electromagnetic potentials that bridges this gap. Starting from an examination of the Aharonov-Bohm effect, we recognize the fundamental role of the electromag... View full abstract»

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  • The double-directional radio channel

    Publication Year: 2001, Page(s):51 - 63
    Cited by:  Papers (263)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB) | HTML iconHTML

    We introduce the concept of the double-directional mobile radio channel. It is called this because it includes angular information at both link ends, e.g., at the base station and at the mobile station. We show that this angular information can be obtained with synchronized antenna arrays at both link ends. In wideband high-resolution measurements, we use a switched linear array at the receiver an... View full abstract»

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  • Investigations into advanced concepts of terminal and base-station antennas

    Publication Year: 2001, Page(s):160 - 169
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1552 KB) | HTML iconHTML

    The development of essentially new terminal and base-station antennas has become one of the most important tasks in contemporary antenna engineering. Improvements in antenna technology must be accomplished regardless of progress in signal processing. Comprehensive research on such antennas has been carried on at the Wroclaw University of Technology, Poland, for several years now. There are three m... View full abstract»

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  • The development of inflatable array antennas

    Publication Year: 2001, Page(s):44 - 50
    Cited by:  Papers (31)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB) | HTML iconHTML

    Inflatable array antennas are being developed to significantly reduce the mass, the launch vehicle stowage volume, and the cost of future spacecraft systems. Three inflatable array antennas, previously developed for spacecraft applications, are a 3.3 m×1.0 m L-band synthetic-aperture radar (SAR) array, a 1.0 m-diameter X-band telecom reflectarray, and a 3 m-diameter Ka-band telecom reflectar... View full abstract»

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  • Cell phone testing and fundamental scientific research

    Publication Year: 2001, Page(s):156 - 158
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    There is a lack of scientific consensus on experimental studies that provide clear evidence either refuting or supporting the cancer induction or promotion potential of RF and microwave radiation from cell phones. The uncertainties persist, in part, because of the limited number and scope of studies that have been undertaken. There is a concern that an established effect from wireless radiation, e... View full abstract»

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  • An integrated maritime surveillance system based on high-frequency surface-wave radars. 1. Theoretical background and numerical simulations

    Publication Year: 2001, Page(s):28 - 43
    Cited by:  Papers (58)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1936 KB) | HTML iconHTML

    An integrated maritime surveillance (IMS) system, based on high-frequency surface-wave radars (HFSWR), is described. IMS provides low-cost, 24-hour, real-time, over-the-horizon surveillance of large ocean areas, out to the 200 nautical mile Exclusive Economic Zone (EEZ). The system can be used to coordinate search and rescue operations, and to combat smuggling, drug trafficking, illegal dumping of... View full abstract»

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  • Application of literate-programming principles for the description of a FORTRAN 90 extension to quaternion arithmetic

    Publication Year: 2001, Page(s):104 - 114
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB) | HTML iconHTML

    In an effort to effectively annotate and document a FORTRAN 90 module that extends the language's mathematical capabilities to the performance of quaternion operations, the literate-programming paradigm is adopted. The basic principles of this paradigm are discussed through a short introduction to the features of a specific literate-programming system known as FWEB. This system is then employed fo... View full abstract»

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  • Approximate expressions for the directivity of a circular microstrip-patch antenna

    Publication Year: 2001, Page(s):88 - 90
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    The determination of directivity values for circular microstrip patches on thin substrates involves the use numerical integration procedures, which have to be repeated every time there is a change in patch-substrate permittivity, By a judicious use of certain approximations, it is shown here that it is possible to secure surprisingly accurate alternative descriptions of the patch directivity behav... View full abstract»

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  • ET or EC? [SETI@Home project]

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    Discusses the SETI@Home project and the problems caused by ethically challenged (EC) participants who attempt to cheat and send back fake results in order to improve their ranking on the project Web site View full abstract»

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  • An improved approximation for the determination of the average RCS of cylinders and flat plates and for the directivity of broadside arrays

    Publication Year: 2001, Page(s):91 - 92
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    An integral commonly occurring in analyses associated with RCS calculations and directivity calculations for uniform arrays is re-examined. Typically, such integrals are evaluated either numerically (a tedious business) or approximately (using asymptotic methods for large arguments). It is shown here that by incorporating only the next higher-order term in the usual asymptotic development for such... View full abstract»

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  • PCS antenna design: the challenge of miniaturization

    Publication Year: 2001, Page(s):12 - 27
    Cited by:  Papers (206)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2040 KB) | HTML iconHTML

    PCS (personal communication system) devices have become an important part of everyday life. The pressure to design small, lightweight, and user-friendly mobile-communication devices has increased accordingly, creating the need for optimal antennas for mobile applications. In this paper, we present some basic rules about electrically small antennas, give clues and guidelines about efficient antenna... View full abstract»

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  • Networking

    Publication Year: 2001, Page(s):138 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Networking is more than just working your way through a maze of contacts, making brief connections. It's a process that needs to be approached strategically and over the long term. For many successful people-including politicians, salesmen, reporters, self-employed consultants, policemen, and even engineers-networking is a routine they practice assiduously, and it is an integral part of their prof... View full abstract»

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