IEEE Antennas and Propagation Magazine

Volume 46 Issue 1 • Feb 2004

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Displaying Results 1 - 25 of 59
  • Antennas and Wireless Propagation Letters (AWPL)

    Publication Year: 2004, Page(s): 149
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  • Overwhelmed by choices

    Publication Year: 2004, Page(s): 147
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  • A simple stackable re-radiating boundary condition (rRBC) for FDTD

    Publication Year: 2004, Page(s):124 - 130
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB) | HTML iconHTML

    The fundamental properties of a new re-radiating boundary condition (rRBC) for terminating the grid in the finite-difference time-domain (FDTD) method are examined. It is shown that because it is based on the field teleportation principle of [M.E. Watts et al., February-March 2003], this rRBC generates exact negative copies of the outgoing time-domain fields in FDTD, independently of the angle of ... View full abstract»

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  • Chapter news

    Publication Year: 2004, Page(s):80 - 84
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  • Social events

    Publication Year: 2004, Page(s):16 - 19
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  • Antennas for non-specialists

    Publication Year: 2004, Page(s):65 - 84
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB) | HTML iconHTML

    The article reports the experience of giving a hands-on antenna course to a group of participants who were not antenna specialists. The discussion of the results is presented in the format of a student-instructor dialog. The questions asked by the participants were sometimes very challenging to answer, especially without resorting to mathematical formulas. For the benefit of those antenna instruct... View full abstract»

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  • Scattered and absorbed powers in receiving antennas

    Publication Year: 2004, Page(s):144 - 145
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB) | HTML iconHTML

    This paper discusses the amount of power, which is scattered and absorbed by a receiving antenna and in particular, whether an antenna can absorb the entire power incident upon it. The absorbed and scattered power from dipole arrays in either free space, or over ground plane is considered. By defining a suitable "aperture efficiency" for the receiving case, a dipole array without a ground plane ca... View full abstract»

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  • Controversy over cellular mobile-telecommunication base-station-antenna installations

    Publication Year: 2004, Page(s):155 - 156
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    The two most compelling issues that cause cellular-telephone towers to be so controversial are the public health and aesthetic concerns. People love the wireless convenience and instant connectivity, but no one likes the antenna tower that enables it. The siting of the cellular mobile telephone towers remains a divisive issue, worldwide. Some concerns stem from a lack of personal freedom of choice... View full abstract»

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  • Large Antennas of the Deep Space Network [Book Review]

    Publication Year: 2004, Page(s):110 - 111
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    Freely Available from IEEE
  • Stepped-waveguide material-characterization technique

    Publication Year: 2004, Page(s):170 - 175
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    Electromagnetic material characterization is the process of determining the complex permittivity and permeability of a material. Rectangular-waveguide measurements involving frequencies greater than several gigahertz require only a relatively small test sample. In an X-band (8-12 GHz) waveguide, for example, sample dimensions in the cross-sectional plane are only 0.9 in by 0.4 in. However, wavegui... View full abstract»

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  • On the design of switched-beam wideband base stations

    Publication Year: 2004, Page(s):158 - 167
    Cited by:  Papers (21)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (675 KB) | HTML iconHTML

    A switch beam base-station antenna is presented. The antenna is an improvement on the Butler matrix. The input ports of the antenna are excited with equal or unequal amplitudes. The feed network is analyzed and presented in a simple manner. The antenna comprises the main part of a base station, and is useful for broadband communications. The architecture of the base station is described, and the s... View full abstract»

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  • Special sessions

    Publication Year: 2004, Page(s): 15
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  • Fourth Internefianal Conference on Antenna Theory and Techniques

    Publication Year: 2004, Page(s):114 - 116
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  • Information for contributors

    Publication Year: 2004, Page(s): 4
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  • Analysis and measurement of a broadband spiral antenna

    Publication Year: 2004, Page(s):59 - 64
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB) | HTML iconHTML

    A broadband spiral antenna (2 to 18 GHz) is modeled using the FDTD method. The inner turn of the antenna is an Archimedean spiral, while the outer turn is an Archimedean spiral with a zigzag shape. The current-density distribution along the spiral arms is first presented in the time domain, interestingly manifesting the impulse current propagation from the feed point to the outer end of the spiral... View full abstract»

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  • Robots and girls

    Publication Year: 2004, Page(s):142 - 143
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    This paper is about a project, which aims to encourage girls to pursue math, science and especially engineering careers. We chose Lego Mindstorm® robots to introduce engineering concepts to a high-school physics curriculum at an all-girls' school. The project lasted about four weeks. The equipment and framework for the program was provided by the Wireless Micro Systems (WIMS) Research Center a... View full abstract»

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  • Exhibits / Technical Program

    Publication Year: 2004, Page(s): 13
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  • Introducing Trevor Bird, chapter activities coordinator and associate editor for chapter news

    Publication Year: 2004, Page(s): 85
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  • Planar Antennas for Wireless Communications [Book Review]

    Publication Year: 2004, Page(s): 110
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • AMTA corner

    Publication Year: 2004, Page(s):169 - 170
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  • EMP note series

    Publication Year: 2004, Page(s):111 - 112
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  • Report on the 2003 AMTA Symposium

    Publication Year: 2004, Page(s):175 - 176
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  • A design study for the basic TEM horn antenna

    Publication Year: 2004, Page(s):86 - 92
    Cited by:  Papers (42)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (549 KB) | HTML iconHTML

    In this paper, a design study was performed for the basic TEM horn antenna. In the theoretical model, care was taken to avoid the problems associated with the use of gap sources when calculating the reflection coefficient and input impedance of the antenna. All numerical calculations were made with a program based on the method of moments, and the accuracy of the numerical calculations was establi... View full abstract»

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  • A new year's resolutions laws

    Publication Year: 2004, Page(s):132 - 133
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  • Recent books

    Publication Year: 2004, Page(s): 112
    Cited by:  Papers (1)
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Mahta Moghaddam