# IEEE Antennas and Wireless Propagation Letters

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Displaying Results 1 - 25 of 155
• ### IEEE Antennas and Wireless Propagation Letters publication information

Publication Year: 2006, Page(s): 598
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Publication Year: 2006, Page(s):596 - 597
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• ### 2006 Index

Publication Year: 2006, Page(s):578 - 595
Cited by:  Papers (1)
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Publication Year: 2006, Page(s):572 - 577
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• ### 2006 Reviewers' List

Publication Year: 2006, Page(s):570 - 571
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• ### Reply to the Comments on "Blind Calibration and DOA Estimation With Uniform Circular Arrays in the Presence of Mutual Coupling"

Publication Year: 2006, Page(s):568 - 569
Cited by:  Papers (3)
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This paper presents the reply to the comments made by Gao et al. on blind calibration and DOA estimation with uniform circular arrays in the presence of mutual coupling View full abstract»

• ### Comments on "Blind Calibration and DOA Estimation With Uniform Circular Arrays in the Presence of Mutual Coupling"

Publication Year: 2006, Page(s):566 - 568
Cited by:  Papers (6)
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A modification of the proposed algorithm is suggested for better numerical stability and less computation load. The overlooked parameter identifiability problem of the proposed algorithm is discussed in detail. Besides, solution to the ambiguous DOA estimates is also proposed. View full abstract»

• ### On the Radiation Characteristics of Right- and Left-Handed Microstrip Patch Antenna Designs

Publication Year: 2006, Page(s):563 - 565
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Theoretical left-handed materials have been shown to reduce the size of a resonant microstrip antenna while maintaining or increasing impedance bandwidth. This work discusses the implications of the left-handed materials on the radiation characteristics of such structures. The source fields and radiation characteristics of left- and right-handed microstrip patch antenna designs are studied theoret... View full abstract»

• ### Design of Short-Circuited Ring-Patch Antennas Working at $hboxTM_01$ Mode Based on Neural Networks

Publication Year: 2006, Page(s):559 - 562
Cited by:  Papers (11)
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Short-circuited ring-patch (SCRP) antennas provide some advantages derived from their property of having as fundamental mode the TM01 mode. This mode has a monopolar radiation pattern with a null in the zenith, in contrast with the radiation patterns of fundamental mode for circular and ring patches (the TM11 mode) that are broadside. The lack of a good characterization of t... View full abstract»

• ### A Novel Method for Millimeter-Wave On-Wafer Characterization of Reflect Patch Antennas

Publication Year: 2006, Page(s):556 - 558
Cited by:  Papers (1)
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This letter presents a simple new measurement procedure to test single elements of electrically steerable reflectarray antennas. The method allows one to measure the reflection coefficient of reflector antenna elementary cells consisting of resonating elements and phase or amplitude control circuits (MMIC, RF-MEMS, ferroelectric, etc.). The measurement system can be used for verifying the correct ... View full abstract»

• ### A Performance Investigation of an Internal Quad-Band Antenna With Double-Spiral Structures

Publication Year: 2006, Page(s):552 - 555
Cited by:  Papers (2)
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This letter describes a design of an internal quad-band antenna resonating at cellular (824~894 MHz), DCS/PCS (1710~1880 MHz/1850~1990 MHz), and WiBro (wireless broadband Internet, 2300~2390 MHzs) system band by inserting the spiral slits corresponding to the resonant frequencies. In order to accomplish this goal, double-spiral structures are suggested and analyzed by using a commercially availabl... View full abstract»

• ### Wideband Localization of the Dominant Leaky Wave Poles in Dielectric Covered Antennas

Publication Year: 2006, Page(s):549 - 551
Cited by:  Papers (7)
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This letter discusses the properties of printed antennas whose radiation patterns (their directivity or their shape) are enhanced by means of dielectric superlayers which support leaky waves. In particular the characterizing complex leaky wave poles of the spectral Green's function are approximated analytically, for the first time over large frequency bandwidths. The localization of the poles is a... View full abstract»

• ### PSO-Based Real-Time Control of Planar Uniform Circular Arrays

Publication Year: 2006, Page(s):545 - 548
Cited by:  Papers (30)
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This letter is aimed at assessing the effectiveness of the phase-only control strategy based on a customized PSO when applied to planar uniform circular arrays (PUCA) and in the presence of interferences both in the near-field and far-field of the antenna. The employed geometry seems to be suitable for a reliable and effective implementation of adaptive arrays in mobile devices thanks to its symme... View full abstract»

• ### Design of Reconfigurable Array Antennas With Minimum Variation of Active Impedances

Publication Year: 2006, Page(s):541 - 544
Cited by:  Papers (2)
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In this letter, the authors propose an optimization method based on the genetic algorithm (GA) to reconfigure a linear array of vertical half-wavelength dipole antennas to generate two patterns with minimum active impedance variation when the antenna switches from one pattern to other in the presence or absence of a ground plane behind the array. The problem is to find a fixed voltage amplitude di... View full abstract»

• ### Electromagnetic Fields of Hertzian Dipoles in Thin-Layered Media

Publication Year: 2006, Page(s):537 - 540
Cited by:  Papers (9)
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Fast numerical methods are developed to compute the electromagnetic (EM) fields for thin-layered media for the entire distance range. Thin-layered media are defined to be the case when there are only surface wave modes but no leaky modes between the Sommerfeld integration path (SIP) and the vertical branch cut. Fields for distances larger than twice the layer thickness are computed by the numerica... View full abstract»

• ### The Role of Polarization Diversity for MIMO Systems Under Rayleigh-Fading Environments

Publication Year: 2006, Page(s):534 - 536
Cited by:  Papers (44)  |  Patents (1)
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Polarization diversity techniques have not received as much attention as others due to the significant difference in mean signal level between copolarized and cross-polarized branches when one polarization is transmitted. However, multiple-input-multiple-output (MIMO) systems where the multipath fading is only partially correlated could use polarization diversity to provide a high diversity gain. ... View full abstract»

• ### Active Broad X-Band Circular Patch Antenna

Publication Year: 2006, Page(s):529 - 533
Cited by:  Papers (19)
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This letter presents the results of experimental study of omnidirectional circular patch antenna operating in the TM010 mode. Antenna geometrical parameters have been selected on the basis of theoretical calculations. It has been shown that the antenna of this kind with VSWR les 2 and bandwidth of 18% has a conical radiation pattern with maximum oriented 36deg to the zenith. The antenna... View full abstract»

• ### A Technique for Efficiently Modeling Long-Path Propagation for Use in Both FDFD and FDTD

Publication Year: 2006, Page(s):525 - 528
Cited by:  Papers (11)  |  Patents (1)
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A technique is developed for the efficient modeling of propagation over long paths (hundreds of lambda) by breaking the path up into segments and appropriately applying the perfectly matched layer (PML) absorbing boundary condition and the total field/scattered field boundary condition. For finite-difference time-domain (FDTD) simulations the new technique is well suited to model both slow- and fa... View full abstract»

• ### A Compact Unconditionally Stable FDTD Method

Publication Year: 2006, Page(s):520 - 524
Cited by:  Papers (1)
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A novel compact unconditionally stable finite-difference time-domain (US-FDTD) method is introduced. This method utilizes proper intermediate field components to simplify the original unconditionally stable Crank-Nicolson (CN) scheme. The unconditionally stability of the proposed compact US-FDTD method is analytically proven. Numerical results are included to illustrate the stability, accuracy, an... View full abstract»

• ### Wideband Antenna for Underground Soil Scout Transmission

Publication Year: 2006, Page(s):517 - 519
Cited by:  Papers (8)
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The underground soil scout system introduces a need for a small-size antenna capable of adequate radiation efficiency in soils of different moisture contents at the frequency 0.869 GHz. Such an underground antenna is created for the first time. The high permittivity of soil is utilized to downsize the instrument. A prototype design of an underground single-ended elliptical monopole antenna (USEMA)... View full abstract»

• ### Extending the Applicability of the Combined-Field Integral Equation to Geometries Containing Open Surfaces

Publication Year: 2006, Page(s):515 - 516
Cited by:  Papers (14)
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In this letter, we consider the solution of large electromagnetics problems of composite structures with coexisting open and closed conductors. By modifying the construction of the combined-field integral equation (CFIE), we demonstrate a significant improvement in the iterative solution of these problems compared to the conventional electric-field formulation View full abstract»

• ### Analysis and Characterization of a High-Performance Ka-Band Surface Micromachined Elevated Patch Antenna

Publication Year: 2006, Page(s):511 - 514
Cited by:  Papers (20)  |  Patents (2)
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A novel Ka-band surface micromachined air-elevated patch antenna is designed, fabricated, and characterized. It demonstrates a 10.5%-10-dB fractional bandwidth and 9.5-dBi directivity for an elevation of 600 µm. The elevated patch is fed by a vertical epoxy-core metal-coated micromachined probe and supported by several epoxy posts underneath. By the unique feeding technique and the substra... View full abstract»

• ### A Circularly Polarized Microstrip-Fed T-Slot Antenna Array on a Conducting Cylinder

Publication Year: 2006, Page(s):507 - 510
Cited by:  Papers (1)
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A circularly polarized T-slot antenna array wrapped on a conductive cylinder is presented in this letter. This cylindrical antenna array consists of four independent cavity-backed T-slot elements, which are fed by four microstrip lines. The designed array is to be used in a switched-beam mode so that the array's radiation beam can be selected using a single-pole 4-throw (SP4T) switching circuit. S... View full abstract»

• ### Compact Wideband UHF Patch Antenna on a Reactive Impedance Substrate

Publication Year: 2006, Page(s):503 - 506
Cited by:  Papers (29)
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The goal of this letter is to design a compact, planar UHF antenna operating over the frequency range 420-450 MHz. A microstrip patch antenna is selected as the elementary radiating structure because it has a low profile and is simple to fabricate. Compact size and enhanced bandwidth are simultaneously achieved through the use of a reactive impedance surface (RIS) in place of a PEC ground plane. T... View full abstract»

• ### Gain and Aperture Efficiency for a Reflector Antenna With an Array Feed

Publication Year: 2006, Page(s):499 - 502
Cited by:  Papers (15)
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A figure of merit for array antennas can be defined using the signal processing concept of signal-to-noise ratio (SNR) gain. The resulting array efficiency metric reduces to aperture efficiency for an isolated array and to a combination of aperture and spillover efficiency for an array feed. These results provide a practical way to measure aperture efficiency for active arrays and array feeds. View full abstract»

## Aims & Scope

IEEE Antennas and Wireless Propagation Letters is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Christophe Fumeaux
School of Electrical and Electronic Engineering