# IEEE Transactions on Antennas and Propagation

## Filter Results

Displaying Results 1 - 25 of 41

Publication Year: 2009, Page(s):C1 - 1305
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• ### IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2009, Page(s): C2
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• ### Editorial

Publication Year: 2009, Page(s):1306 - 1308
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• ### Low-Profile Equiangular Spiral Antenna Backed by an EBG Reflector

Publication Year: 2009, Page(s):1309 - 1318
Cited by:  Papers (49)  |  Patents (1)
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The bi-directional beam from an equiangular spiral antenna (EAS) is changed to a unidirectional beam using an electromagnetic band gap (EBG) reflector. The antenna height, measured from the upper surface of the EBG reflector to the spiral arms, is chosen to be extremely small to realize a low-profile antenna: 0.07 wavelength at the lowest analysis frequency of 3 GHz. The analysis shows that the EA... View full abstract»

• ### Illustrations of New Physical Bounds on Linearly Polarized Antennas

Publication Year: 2009, Page(s):1319 - 1327
Cited by:  Papers (117)
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A recent approach to physical bounds on antennas of arbitrary shape is numerically illustrated. In particular, physical bounds for antennas circumscribed by the rectangular parallelepiped, finite cylinders, and planar rectangles are presented. The bounds are verified against numerical results for various small antennas with excellent agreement. View full abstract»

• ### Triple Mode Use of a Single Dielectric Resonator

Publication Year: 2009, Page(s):1328 - 1335
Cited by:  Papers (25)
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A single dielectric resonator is used for a triple mode operation in filtering and dual band radiation purposes. A high unloaded quality factor over 2300 at 2.43 GHz is obtained simultaneously with both broadside and omni-directional radiation patterns of 7% and 8% bandwidths around 2.47 and 3.36 GHz, respectively. Series of parametric studies are developed to tune the filter's operating frequency... View full abstract»

• ### Edge Diffraction Suppression in Rectangular Dielectric Resonators for Quality Factor Enhancement Using Artificial Plasma

Publication Year: 2009, Page(s):1336 - 1344
Cited by:  Papers (4)
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The concept of quality factor enhancement in a two dimensional rectangular dielectric resonator (RDR), based on the phenomenon of edge diffraction suppression by a plasma, is presented. This phenomenon occurs when the plasma exhibits the specific negative permittivity, which makes the RDR separable, i.e., analytically solvable by means of the separation of variables. The Rotman plasma, constituted... View full abstract»

• ### Performance of a Crossed Exponentially Tapered Slot Antenna for UWB Systems

Publication Year: 2009, Page(s):1345 - 1352
Cited by:  Papers (32)
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A compact printed antenna is described that exhibits adequate transient performance for ultrawideband (UWB) applications and it is further adequate for polarization diversity schemes. The antenna is based on an original combination of two crossed exponentially tapered slots plus a star-shaped slot to produce a stable radiation pattern with very stable polarization over the 3.1-10.6 GHz FCC assigne... View full abstract»

• ### Investigations on Ultrawideband Pentagon Shape Microstrip Slot Antenna for Wireless Communications

Publication Year: 2009, Page(s):1353 - 1359
Cited by:  Papers (34)
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An ultrawideband (UWB) pentagon shape planar microstrip slot antenna is presented that can find applications in wireless communications. Combination of the pentagon shape slot, feed line and pentagon stub are used to obtain 124% (2.65-11.30 GHz) impedance bandwidth which exceeds the UWB requirement of 110% (3.10-10.60 GHz). A ground plane of 50 mm &times; 80 mm size is used which is similar to... View full abstract»

• ### A Miniaturized Ground Edge Current Choke—Design, Measurement, and Applications

Publication Year: 2009, Page(s):1360 - 1366
Cited by:  Papers (14)
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We propose a miniaturized microwave current choke for blocking the current flowing along the edge of a substrate's ground plane. The proposed current choke is composed of a printed inductor and a printed capacitor, which possesses a size much smaller than a conventional quarter-wavelength current choke. By introducing the choke at one side of the ground plane, an effective electrical open circuit ... View full abstract»

• ### Cassegrain Antenna With Hybrid Beam Steering Scheme for Mobile Satellite Communications

Publication Year: 2009, Page(s):1367 - 1372
Cited by:  Papers (17)
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A hybrid antenna (HA) with a modified beam steering method is proposed. This antenna has a Cassegrain structure composed of two reflectors and a feeder. The parabolic-shaped main reflector is designed for high gain, while the subreflector is rotational and flat. The feeder is a phased array with arbitrary shaped aperture and 20 element antennas. The HA is capable of two-dimensional beam steering b... View full abstract»

• ### Printed $lambda/8$ -PIFA for Penta-Band WWAN Operation in the Mobile Phone

Publication Year: 2009, Page(s):1373 - 1381
Cited by:  Papers (138)  |  Patents (1)
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A small-size printed planar inverted-F antenna (PIFA) operated at its one-eighth wavelength (lambda/8) mode as the fundamental resonant mode for achieving WWAN (wireless wide area network) operation in the mobile phone is presented. The proposed PIFA has a simple structure of comprising two radiating strips of length about lambda/8 at 900 MHz and is fed using a coupling feed. Compared to the tradi... View full abstract»

• ### Multilevel Plane Wave Based Near-Field Far-Field Transformation for Electrically Large Antennas in Free-Space or Above Material Halfspace

Publication Year: 2009, Page(s):1382 - 1390
Cited by:  Papers (33)
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A recently presented fully probe-corrected near-field far-field transformation employing plane wave expansion and diagonal translation operators enables near-field far-field transformation for arbitrary measurement contours and arbitrary antennas. A multilevel extension, inspired by the multilevel fast multipole method, is presented that is suitable for the efficient transformation of electrically... View full abstract»

• ### Effect of Coupling Phase on Mutual Injection Locking Range in Coupled Oscillator Arrays

Publication Year: 2009, Page(s):1391 - 1398
Cited by:  Papers (2)
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The performance of a coupled oscillator array depends critically on the coupling network. Determination of the optimal coupling phase depends on the oscillator equivalent circuit and the location of mutual coupling between the oscillators. In this paper, the authors examine the effects of coupling phase on the mutual injection locking range. Three element coupled oscillator arrays (COAs) were mutu... View full abstract»

• ### On the Direction of Arrival (DoA) Estimation for a Switched-Beam Antenna System Using Neural Networks

Publication Year: 2009, Page(s):1399 - 1411
Cited by:  Papers (31)
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A generic direction of arrival (DoA) estimation methodology is presented that is based on neural networks (NNs) and designed for a switched-beam system (SBS). The method incorporates the benefits of NNs and SBSs to achieve DoA estimation in a less complex and expensive way compared to the corresponding widely known super resolution algorithms. The proposed technique is step-by-step developed and t... View full abstract»

• ### Mean-Field Electrodynamic Theory of Aligned Carbon Nanotube Composites

Publication Year: 2009, Page(s):1412 - 1419
Cited by:  Papers (11)
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We propose an improved effective-medium theory to study the interaction of the electromagnetic field with carbon nanotubes composites. The axial response of the tube is obtained by an approximate solution of the parallel polarization scattering by spheroidal-shape inclusions, which takes into account the first-order geometric resonances and intra/inter-band transitions. The proposed theory is in c... View full abstract»

• ### Efficient Analysis of Aperture Antennas on Generally Shaped Convex Multilayered Surfaces Using a Hybrid SD-UTD Method

Publication Year: 2009, Page(s):1420 - 1431
Cited by:  Papers (6)
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A novel hybrid method is described for analyzing convex multilayered conformal array antennas. The hybrid method is based on the spectral domain approach in combination with the ray-based uniform theory of diffraction (UTD) method. The analysis is divided in two parts. First, the spectral domain approach is accelerated by using an asymptotic extraction technique where the extracted term of the Gre... View full abstract»

• ### A Radially-Dependent Dispersive Finite-Difference Time-Domain Method for the Evaluation of Electromagnetic Cloaks

Publication Year: 2009, Page(s):1432 - 1441
Cited by:  Papers (37)
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A radially-dependent dispersive finite-difference time-domain (FDTD) method is proposed to simulate electromagnetic cloaking devices. The Drude dispersion model is applied to model the electromagnetic characteristics of the cloaking medium. Both lossless and lossy cloaking materials are examined and their operating bandwidth investigated. It is demonstrated that the perfect ldquoinvisibilityrdquo ... View full abstract»

• ### FDTD-PWS Scheme and Its Application to Analysis of Focusing Properties of Dielectric Lens

Publication Year: 2009, Page(s):1442 - 1451
Cited by:  Papers (4)
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The focusing properties of lens are studied by a hybrid scheme that involves the finite-difference time-domain (FDTD) method for the aperture-plane field computation and the plane wave spectrum (PWS) method for the transformation from the aperture-plane field to the focal-plane field. To demonstrate the accuracy and efficiency of this new scheme, a Ka-band lens antenna is simulated and fabricated ... View full abstract»

• ### Higher Order Hybrid FEM-MoM Technique for Analysis of Antennas and Scatterers

Publication Year: 2009, Page(s):1452 - 1460
Cited by:  Papers (30)
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A novel higher order large-domain hybrid computational electromagnetic technique based on the finite element method (FEM) and method of moments (MoM) is proposed for three-dimensional analysis of antennas and scatterers in the frequency domain. The geometry of the structure is modeled using generalized curved parametric hexahedral and quadrilateral elements of arbitrary geometrical orders. The fie... View full abstract»

• ### Empirical Near Ground Path Loss Modeling in a Forest at VHF and UHF Bands

Publication Year: 2009, Page(s):1461 - 1468
Cited by:  Papers (55)
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Near ground radio wave propagation is examined in a tropical plantation experimentally at VHF and UHF bands. The propagation loss with forest depth is empirically analyzed using an integrated model combining both the foliage induced effect and the ground effect. Several well-known empirical foliage models are compared and analyzed. It is observed that the fitted ITU-R model taking into account the... View full abstract»

• ### Speed-Up Techniques for Ray Tracing Field Prediction Models

Publication Year: 2009, Page(s):1469 - 1480
Cited by:  Papers (35)
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Despite their good performance, the widespread diffusion of ray tracing field-prediction models is still limited due to their high complexity and high computation time. In this paper, two different classes of methods for speeding up ray tracing urban field prediction are proposed, aimed at reducing the size of the input database and the number of rays to be handled by the algorithm. With the propo... View full abstract»

• ### Transmission Through Layered Media With Rough Boundaries: First-Order Perturbative Solution

Publication Year: 2009, Page(s):1481 - 1494
Cited by:  Papers (15)
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We investigate analytically the fully polarimetric electromagnetic wave propagation through a 3-D layered structure. In the framework of the first-order limit of the perturbation theory, a transmission model for a layered structure with an arbitrary number of rough interfaces is developed and an elegant closed-form solution is obtained. The final expressions, in terms of generalized reflection/tra... View full abstract»

• ### Bidirectional Analytic Ray Tracing for Fast Computation of Composite Scattering From Electric-Large Target Over a Randomly Rough Surface

Publication Year: 2009, Page(s):1495 - 1505
Cited by:  Papers (52)
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The bidirectional analytic ray tracing (BART) method is developed to rapidly calculate composite scattering from three-dimensional (3D) electrically large complex targets above a randomly rough surface. Ray tracing is carried out both along the incident (forward) direction and converse direction of scattering (backward) recording different orders of ray illumination on each facet or edge of the ta... View full abstract»

• ### Time Domain Integral Equation Analysis of Scattering From Composite Bodies via Exact Evaluation of Radiation Fields

Publication Year: 2009, Page(s):1506 - 1520
Cited by:  Papers (69)
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A novel marching on in time and Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT)-based time domain integral equation solver for analyzing transient scattering from composite multiregion structures comprising homogeneous penetrable volumes and perfectly conducting surfaces is presented. To render the marching on in time procedure stable, observer and source integrals are approximated via multipoint ... 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