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IEEE Antennas and Propagation Magazine

Issue 1 • Feb. 2014

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  • [Front cover]

    Publication Year: 2014, Page(s): c1
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  • [Front inside cover]

    Publication Year: 2014, Page(s): c2
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  • Table of contents

    Publication Year: 2014, Page(s):3 - 5
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  • [Copyright notice]

    Publication Year: 2014, Page(s): 5
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  • Information for contributors

    Publication Year: 2014, Page(s): 6
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  • Magazine staff

    Publication Year: 2014, Page(s):7 - 10
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  • AP-S officers and Administrative Committee

    Publication Year: 2014, Page(s): 11
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  • Editor's comments: 30 Years and Gone

    Publication Year: 2014, Page(s):12, 301 - 303
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  • President's message

    Publication Year: 2014, Page(s):12 - 13
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  • Changes of address or delivery problems

    Publication Year: 2014, Page(s): 13
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  • Getting the magazine by air freight

    Publication Year: 2014, Page(s): 13
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  • Revisiting the generation of cross-polarization in rectangular patch antennas: A near-field approach

    Publication Year: 2014, Page(s):14 - 38
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7779 KB) | HTML iconHTML

    In this work, the cross-polarized radiation from a rectangular patch antenna was studied as a consequence of the asymmetries (or disturbances) in the near field of the antenna. It was shown that the asymmetry of the probe location results in asymmetry in the near fields in the vicinity of the antenna, causing high cross-polarized radiation in the H plane of the antenna. These near-field disturbanc... View full abstract»

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  • On reflector feeds with unidirectional axially symmetric radiation patterns: Their cross-polarization performance and efficiencies

    Publication Year: 2014, Page(s):39 - 61
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (15117 KB) | HTML iconHTML

    The performance and radiation mechanisms of feed antennas with unidirectional axially symmetric radiation patterns are investigated in detail. Radiating circular apertures, electric-magnetic dipole pairs, and two-element elliptical dipole arrays are discussed. The performance metric considers both the maximum cross-polarization level and the efficiency performance when evaluated on a general refle... View full abstract»

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  • Multimode beamforming networks for space applications

    Publication Year: 2014, Page(s):62 - 78
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (9160 KB) | HTML iconHTML

    Increased demand for narrow multi-linguistic beams, and a reduction in the number of antennas for multi-spot systems, are revitalizing the need for lossless multimode networks at various frequencies. This paper reviews basic concepts, techniques, and technologies of multimode beamforming networks for satellite multiple beams and reconfigurable antennas. View full abstract»

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  • Advances in antenna designs for UHF RFID tags mountable on conductive items

    Publication Year: 2014, Page(s):79 - 103
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5033 KB) | HTML iconHTML

    The design of antennas for metal-mountable radio-frequency identification tags is driven by a unique set of challenges: cheap, small, low-profile, and conformal structures need to provide reliable operation when tags are mounted on conductive platforms of various shapes and sizes. During the past decade, a tremendous amount of research has been dedicated to meeting these stringent requirements. Cu... View full abstract»

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  • Microwave imaging using indirect holographic techniques

    Publication Year: 2014, Page(s):104 - 117
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3081 KB) | HTML iconHTML

    This work describes how indirect holographic techniques, previously applied to the determination of antenna radiation patterns, can be adapted for the imaging of passive objects. It provides details of how complex scattered field values can be obtained in a simple and inexpensive manner from sampled scalar intensity measurements taken over a single scanning aperture. This work provides a brief out... View full abstract»

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  • Optical transfer function (OTF) of a Rotman lens antenna for imaging applications

    Publication Year: 2014, Page(s):118 - 129
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2251 KB) | HTML iconHTML

    This paper presents a new approach to analyzing a Rotman lens for imaging applications. The optical transfer function (OTF) is used to analyze the imaging capability of a Rotman lens. The variations in optical transfer function and the image pattern were calculated with variations in the design parameters due to beam-port spacing, antenna spacing, array size, and so on. As a result, it was found t... View full abstract»

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  • A comparison of perturbation formulas for a square electromagnetic resonator

    Publication Year: 2014, Page(s):130 - 142
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2192 KB) | HTML iconHTML

    Several perturbation formulas are available for the resonant frequency of an electromagnetic cavity subjected to shape and material perturbations. Each is based on a mathematical identity from vector calculus, a choice of trial fields, and the manner in which the boundary conditions are met. The limits of usefulness of a given perturbation formula depend on these factors. Slater proposed a perturb... View full abstract»

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    Publication Year: 2014, Page(s): 143
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  • Chapter news

    Publication Year: 2014, Page(s):144 - 151
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  • XVIIIth International Seminar/Workshop DIPED-2013

    Publication Year: 2014, Page(s):152 - 154
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    Publication Year: 2014, Page(s): 155
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  • Comment on the definition of antenna half-power and impedance-matching bandwidths [antenna designer's notebook]

    Publication Year: 2014, Page(s):156 - 158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4054 KB) | HTML iconHTML

    There are two antenna-bandwidth def nitions that are sometimes confused. These def nitions are for the antenna half-power bandwidth (HPBW) and the antenna impedance-matching bandwidth (IMBW). These are def ned below. View full abstract»

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    Publication Year: 2014, Page(s): 159
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  • Three-dimensional position and orientation measurements using magneto-quasistatic fields and complex image theory [measurements corner]

    Publication Year: 2014, Page(s):160 - 173
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (13230 KB) | HTML iconHTML

    Traditional wireless position-location systems, operating using propagating waves, suffer reduced performance in non-line-of-sight (NLoS) applications. Traditional systems that use quasistatic fields have instead been limited to short ranges, progressive direction-finding applications, require RF fingerprinting, or do not provide complete immunity to dielectric obstacles (use of electric fields). ... View full abstract»

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Mahta Moghaddam