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Microwave Magazine, IEEE

Issue 3 • Date Sept. 2004

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Displaying Results 1 - 21 of 21
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  • Radio frequency integrated circuit design

    Page(s): 76 - 78
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  • The secret to the universe

    Page(s): 104 - 102
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (474 KB) |  | HTML iconHTML  

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  • Speaker's corner

    Page(s): 14 - 20
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  • A space-mapped model of thick, tightly coupled conductors for planar electromagnetic analysis

    Page(s): 62 - 72
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    Accurate modelling of thick metal in a planar electromagnetic analysis can require that the thickness of the metal be divided into a large number of thin sheets or layers, substantially increasing analysis time. This order of modelling is especially important when two thick conductors are separated by less than the metal thickness. This article describes a method to efficiently realize the accuracy of a large number of thin sheets by introducing a "space mapping" layer into a simple model that can be efficiently analyzed. View full abstract»

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  • From bell tower to cell tower [base stations]

    Page(s): 30 - 32
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    White church steeples generally house nothing more exotic than church bells, but cellular service providers in many areas have been trying to subject these towers to multitasking by installing base stations within. View full abstract»

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  • Microwave radiation and leakage of albumin from blood to brain

    Page(s): 22 - 28
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    The blood-brain barrier (BBB) is a cell layer in the blood vessels of the brain. The BBB partitions the circulating blood from the brain tissue proper and regulates the passage of vital substances and nutrients into brain tissues and carbon dioxide and metabolic waste products out of it. The selective passage prohibits harmful toxins from infiltrating the brain, and also excludes many drugs and therapeutic agents from reaching brain tissues. Many investigators have published studies on the effect of microwave radiation on the BBB of experimental animals with varied results. Studies showing, and not showing, a microwave-induced increase in rat BBB permeability changes had used both high and low levels of microwave exposure. However, a series of reports showing disruption of BBB at various times following microwave exposure has caught the attention of many in the field. View full abstract»

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  • MTT-S news

    Page(s): 80 - 83
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  • Millimeter waveband semisymmetrical groove guide resonators

    Page(s): 51 - 60
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    As an alternative to the classical waveguides, such as the H-waveguide and the rectangular waveguide, the groove waveguide has been used at millimetre wavelengths for the last couple of decades. Most of these properties are attributed to the open sides of the guide, which reduce the wall losses. This article describes a semisymmetrical groove guide resonator that is designed and analyzed analytically, numerically, and experimentally. The numerical simulations are performed via a powerful time-domain simulator based on the finite-difference, time-domain (FDTD) method. Both Cartesian- and cylindrical-coordinate FDTD packages are developed and used for the simulations. The purpose in using cylindrical-coordinate FDTD is to calibrate Cartesian-coordinate FDTD and to see the error introduced due to discretization. A measurement setup with an adjustable support platform in the frequency range of 20-40 GHz is used in the experiments. View full abstract»

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  • President's column

    Page(s): 10 - 12
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  • Electromagnetics for communication engineering [Book Review]

    Page(s): 74 - 76
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  • Transnational news

    Page(s): 84 - 87
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  • IEEE Microwave Magazine

    Page(s): 0_1
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  • Table of contents

    Page(s): 3 - 4
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  • From the Editor's desk

    Page(s): 6 - 8
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  • Composite right/left-handed transmission line metamaterials

    Page(s): 34 - 50
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    Metamaterials are artificial structures that can be designed to exhibit specific electromagnetic properties not commonly found in nature. Recently, metamaterials with simultaneously negative permittivity (/spl epsiv/) and permeability (μ), more commonly referred to as left-handed (LH) materials, have received substantial attention in the scientific and engineering communities. The unique properties of LHMs have allowed novel applications, concepts, and devices to be developed. In this article, the fundamental electromagnetic properties of LHMs and the physical realization of these materials are reviewed based on a general transmission line (TL) approach. The general TL approach provides insight into the physical phenomena of LHMs and provides an efficient design tool for LH applications. LHMs are considered to be a more general model of composite right/left hand (CRLH) structures, which also include right-handed (RH) effects that occur naturally in practical LHMs. Characterization, design, and implementation of one-dimensional and two-dimensional CRLH TLs are examined. In addition, microwave devices based on CRLH TLs and their applications are presented. View full abstract»

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  • Conference calendar

    Page(s): 88
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  • MTT-S Ombudsman

    Page(s): 90 - 94
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  • European Microwave Exhibition 2004

    Page(s): 93
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  • New products

    Page(s): 96 - 102
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  • Advertisers' index

    Page(s): 103
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Aims & Scope

IEEE Microwave Magazine is intended to serve primarily as a source of information of interest to professionals in the field of microwave theory and techniques.

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Meet Our Editors

Editor-in-Chief
John Wood
Maxim Integrated Products, Inc.

San Jose, CA      USA
john.wood@ieee.org
Phone:+1 480 577 0927