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# IEEE Transactions on Antennas and Propagation

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Displaying Results 1 - 25 of 36

Publication Year: 2007, Page(s):C1 - 1021
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• ### IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2007, Page(s): C2
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• ### Spaceborne Mesh Reflector Antennas With Complex Weaves: Extended PO/Periodic-MoM Analysis

Publication Year: 2007, Page(s):1022 - 1029
Cited by:  Papers (19)
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Reflector antennas with complex mesh weave patterns are numerically analyzed by using extended physical optics (PO) combined with the periodic method of moments (MoM). The method applies the periodic MoM with Rao-Wilton-Glisson (RWG) basis and testing functions. It calculates the transmission coefficient matrix (T-matrix) of the realistic, complex weave pattern of the planar mesh, in order to calc... View full abstract»

• ### Closed-Form Expressions of the Axial Step and Impulse Responses of a Parabolic Reflector Antenna

Publication Year: 2007, Page(s):1030 - 1037
Cited by:  Papers (10)
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Electromagnetic pulses radiated by parabolic antennas and similar structures are needed in many applications like air and ground penetrating radar or high power microwaves (HPM) weapons. In this paper, an approach based on Skulkin and Turchin's work and on physical optics approximation in the time domain is developed to determine the radiated fields. Closed-form time-domain expressions of the elec... View full abstract»

• ### Electrically-Small Shaped Integrated Lens Antennas: A Study of Feasibility in $Q$-Band

Publication Year: 2007, Page(s):1038 - 1044
Cited by:  Papers (18)
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Integrated lens antennas (ILAs) are essentially high-gain (sub)millimeter-wave radiating structures. They often have a moderate (or even poor) aperture efficiency because their design rules are generally based on high-frequency methods of analysis with no advanced optimization procedures. From the proposed classification of ILA types as a function of their aperture efficiency, we demonstrate the f... View full abstract»

• ### Study of an Electrochemically-Deposited 3-D Random Fractal Tree-Monopole Antenna

Publication Year: 2007, Page(s):1045 - 1050
Cited by:  Papers (13)
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A 3-D fractal-tree monopole antenna was realized using electrochemical deposition technique. Experimental results on the return loss over the band 1-20 GHz and radiation patterns at all resonating frequencies were presented. The multiband electromagnetic behavior of the antenna was studied and compared to a previously reported 2-D fractal-tree antenna studied by C. Puente It is shown that the impe... View full abstract»

• ### Multilayer Effects on Microstrip Antennas for Their Integration With Mechanical Structures

Publication Year: 2007, Page(s):1051 - 1058
Cited by:  Papers (24)
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The effect of multilayer geometry on microstrip antennas is investigated for the design of antenna-integrated mechanical structure. Changes in the gain of antenna due to the geometry have been determined using a transmission line analogy. Design of high-gain antenna in bandwidth is proposed away from structural resonance. Experiments are done on microstrip antennas covered by superstrates in order... View full abstract»

• ### An Effective Hybrid Approach for the Optimal Synthesis of Monopulse Antennas

Publication Year: 2007, Page(s):1059 - 1066
Cited by:  Papers (41)
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The problem of synthesizing "optimal" sum and difference patterns subject to arbitrary sidelobe bounds by means of a simple feeding network is dealt with. It is shown how a hybrid optimization procedure properly acting on both clustering into subarrays and excitations of these latter greatly improves performances of known feeding architectures with respect to existing procedures. Results of the pr... View full abstract»

• ### Synthesis of Sparse Planar Arrays Using Modified Real Genetic Algorithm

Publication Year: 2007, Page(s):1067 - 1073
Cited by:  Papers (64)
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In array design, the positions of sparse array elements is an important concern for optimal performance in terms of its ability to achieve minimum peak sidelobe level (SLL). This paper proposes a modified real genetic algorithm (MGA) based on resetting of chromosome for the element position optimization of sparse planar arrays with rectangular boundary. And here the multiple optimization constrain... View full abstract»

• ### Metamaterial Insulator Enabled Superdirective Array

Publication Year: 2007, Page(s):1074 - 1085
Cited by:  Papers (50)  |  Patents (5)
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Metamaterial EM insulators are shown to suppress mutual coupling between densely packed array elements. This technique allows for array element design in isolation, without consideration of adjacent elements and mutual coupling effects. Suppressing mutual coupling allows for denser packing and enhanced directivity in antenna arrays approaching the superdirective theoretical maximums. Metamaterial ... View full abstract»

• ### Separation of Horizontal and Vertical Dependencies in a Surface/Volume Integral Equation Approach to Model Quasi 3-D Structures in Multilayered Media

Publication Year: 2007, Page(s):1086 - 1094
Cited by:  Papers (41)
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A new and efficient integral equation approach is presented to model heterogeneous dielectric volumes in a multilayered environment. The dielectric volumes can be vertically large, they can cross dielectric interfaces and they should be "quasi 3-D," which means that the contour faces should be placed either horizontally or vertically in the multilayered environment. In this way, a perpendicular pr... View full abstract»

• ### Stability and Dispersion Analysis for ADI-FDTD Method in Lossy Media

Publication Year: 2007, Page(s):1095 - 1102
Cited by:  Papers (17)
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The stability and dispersion analysis for the alternating-direction-implicit finite-difference time-domain (ADI- FDTD) method in lossy media is presented. Although the stability and numerical dispersion have been analyzed for the ADI-FDTD method, most of the analysis is dedicated to the cases of lossless media. Here, the stability and dispersion analysis is performed for the method in lossy media.... View full abstract»

• ### Linear-Linear Basis Functions for MLFMA Solutions of Magnetic-Field and Combined-Field Integral Equations

Publication Year: 2007, Page(s):1103 - 1110
Cited by:  Papers (46)
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We present the linear-linear (LL) basis functions to improve the accuracy of the magnetic-field integral equation (MFIE) and the combined-field integral equation (CFIE) for three-dimensional electromagnetic scattering problems involving closed conductors. We consider the solutions of relatively large scattering problems by employing the multilevel fast multipole algorithm. Accuracy problems of MFI... View full abstract»

• ### Benchmark Antenna Problems for Evolutionary Optimization Algorithms

Publication Year: 2007, Page(s):1111 - 1121
Cited by:  Papers (18)
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A set of antenna-optimization problems is presented that satisfies the necessary requirements to form a test suite useful for measuring and comparing the performance of different evolutionary optimization algorithms (EAs) when they are applied to solve complex electromagnetic problems. The ability of the proposed test suite to find strong and weak points of any EA is illustrated by a complete stud... View full abstract»

• ### Atmospheric Phase Error in Coherent Laser Radar

Publication Year: 2007, Page(s):1122 - 1133
Cited by:  Papers (3)
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Coherent laser radar (ladar) deduces the shape, velocity and vibration of a remote target by measuring the round-trip optical phase or the Doppler shift of target-scattered light. Phase fluctuations from wind-driven atmospheric turbulence generate micro-Doppler or velocity error at mum/sec levels. The turbulence-induced noise spectra of all geometric phase components of the ladar, the average phas... View full abstract»

• ### UHF Propagation in Caves and Subterranean Galleries

Publication Year: 2007, Page(s):1134 - 1138
Cited by:  Papers (10)
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An experimental study is described on the natural propagation of UHF band radio waves in straight subterranean galleries. An extensive measurement project took place in five underground localities and, based on the experimental data, an empirical model of radio wave transmission was derived. The model was calibrated according to the measurement data and compared with the theoretical waveguide appr... View full abstract»

• ### Modelling and Measuring Reflection Due to Flat Dielectric Surfaces at 5.8 GHz

Publication Year: 2007, Page(s):1139 - 1147
Cited by:  Papers (9)
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Indoor radio channel planning tools implement different models to simulate propagation mechanisms such as transmission or reflection. The specular reflection formulation is commonly used instead of more complete scattering models. This happens because its coding is less complicated and the software runs faster than when considering reflection in all directions, not yet specular. In this paper, res... View full abstract»

• ### Band Characteristics of SINR Polarization Filter

Publication Year: 2007, Page(s):1148 - 1154
Cited by:  Papers (12)
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The band characteristics of the signal-to-interference-and-noise-ratio polarization filter to one signal in the presence of single noncoherent, purely polarized interference are investigated. The formulae of the filter band width on the polarization tracks and in the whole polarization region are presented. The quantitative description and the characteristic curves of the band scale are also given View full abstract»

• ### Low SAR Ferrite Handset Antenna Design

Publication Year: 2007, Page(s):1155 - 1164
Cited by:  Papers (34)
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The benefits resulting from the inclusion of ferrite in material loaded antennas are investigated, initially through the use of a spherical analytic model and then through a transmission line matrix simulation tool applied to a rectangular slab geometry. It is observed that a material with equality of relative permittivity and permeability in combination with specific positioning of the antenna in... View full abstract»

• ### Internal Patch Antenna With a Thin Air-Layer Substrate for GSM/DCS Operation in a PDA Phone

Publication Year: 2007, Page(s):1165 - 1172
Cited by:  Papers (45)
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A thin dual-band internal patch antenna for Global System for Mobile Communication, 890-960 MHz/Digital Communication System, 1710-1880 MHz (GSM/DCS) operation in a Personal Digital Assistant (PDA) phone is presented. The antenna can generate two wide resonant modes for GSM (890-960 MHz) and DCS (1710-1880 MHz) operation, yet it requires an air-layer substrate of thickness 4 mm only, which is amon... View full abstract»

• ### Multibeam Selection for Indoor MIMO Systems: Two Cases of Study

Publication Year: 2007, Page(s):1173 - 1179
Cited by:  Papers (2)  |  Patents (2)
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The performance of multiple-input multiple-output (MIMO) systems using beam selection is investigated in this paper. Based on the results of a channel sounding campaign carried out at the University of Manitoba for line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios, it was possible to contrast the results of transmitter, receiver and joint beam selection in rich scattering environments. Th... View full abstract»

• ### Internal Ultrawideband Monopole Antenna for Wireless USB Dongle Applications

Publication Year: 2007, Page(s):1180 - 1183
Cited by:  Papers (39)
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A novel, ultrawideband (UWB) monopole antenna suitable to be mounted on the printed circuit board (PCB) of a wireless, universal, serial-bus (USB) dongle as an internal antenna is presented. The proposed antenna in the study is a U-shaped, metal-plate monopole antenna, easily fabricated from bending a simple metal plate onto a foam base of a compact size of 6times11times20 mm3. The ante... View full abstract»

• ### A Study of Ultrawideband Antennas for Near-Field Imaging

Publication Year: 2007, Page(s):1184 - 1188
Cited by:  Papers (39)
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A compact ultrawideband (UWB) antenna has been designed for UWB cancer detection systems. The numerical analysis and experimental characterization of a printed monopole antenna fed by a 50-Omega coplanar waveguide (CPW) and operating in a lossy coupling medium is presented. A detailed 3D model of the antenna and the biological environment has been constructed and simulated in XFDTD and HFSS. The n... View full abstract»

• ### Ultrawideband Printed Elliptical Monopole Antennas

Publication Year: 2007, Page(s):1189 - 1192
Cited by:  Papers (72)
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Parametric study of ultrawideband printed elliptical monopole antennas have been presented. Design curve for the length of the feed transmission line for various lower band edge frequencies has been generated. Variation of bandwidth with ellipticity ratio of these configurations has also been studied. Experiments have been performed to measure bandwidth and radiation patterns of these configuratio... View full abstract»

• ### Frequency Tunable Microstrip Patch Antenna Using RF MEMS Technology

Publication Year: 2007, Page(s):1193 - 1196
Cited by:  Papers (84)  |  Patents (4)
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A novel reconfigurable microstrip patch antenna is presented that is monolithically integrated with RF microelectromechanical systems (MEMS) capacitors for tuning the resonant frequency. Reconfigurability of the operating frequency of the microstrip patch antenna is achieved by loading it with a coplanar waveguide (CPW) stub on which variable MEMS capacitors are placed periodically. MEMS capacitor... View full abstract»

## Aims & Scope

IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief                                             Danilo Erricolo