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# IEEE Antennas and Wireless Propagation Letters

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Displaying Results 1 - 25 of 216

Publication Year: 2008, Page(s):C1 - 846
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• ### IEEE Antennas and Wireless Propagation Letters publication information

Publication Year: 2008, Page(s): C2
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• ### Wideband and Dual-Band Design of a Printed Dipole Antenna

Publication Year: 2008, Page(s):1 - 4
Cited by:  Papers (33)
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A wideband and dual-band dipole antenna with an integrated balun feed is given. First, the antenna structure is optimized and a 41.5% bandwidth is obtained where voltage standing wave ratio (VSWR) is less than 2. In order to further get a larger bandwidth and dual-band capabilities of this antenna, some rectangle apertures are etched onto the antenna surface, and a better dipole antenna is fabrica... View full abstract»

• ### Meandered-Slot Antennas for Sensor-RFID Tags

Publication Year: 2008, Page(s):5 - 8
Cited by:  Papers (29)
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This letter introduces a planar antenna layout suited to sensor-RFID fabrication. The geometry is based on a meandered-slot profile on a suspended patch and permits to host sensors and electronics in a small space. The available geometrical parameters are optimized by means of a genetic algorithm (GA) procedure aimed to maximize the antenna realized gain. The antenna performances are discussed thr... View full abstract»

• ### A Single Layer Wideband U-Slot Microstrip Patch Antenna Array

Publication Year: 2008, Page(s):9 - 12
Cited by:  Papers (49)
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The design and measured results of a 2 times 2 microstrip line fed U-slot rectangular antenna array are presented. The U-slot patches and the feeding network are placed on the same layer, resulting in a very simple structure. The advantage of the microstrip line fed U-slot patch is that it is easy to form the array. An impedance bandwidth (VSWR < 2) of 18% ranging from 5.65 GHz to 6.78 GHz is a... View full abstract»

• ### Negative Permeability-Based Electrically Small Antennas

Publication Year: 2008, Page(s):13 - 17
Cited by:  Papers (6)
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The goal of this letter is to present the behavior of mu-negative (MNG) metamaterial-based electrically small antennas. The Green's function analysis is applied to characterize the performance of a hemispherical negative permeability (MNG) resonator excited by a slot aperture. The method of moment (MoM) is used to obtain the current distribution over the source excitation. It is illustrated how a ... View full abstract»

• ### Printed Slot Planar Inverted Cone Antenna for Ultrawideband Applications

Publication Year: 2008, Page(s):18 - 21
Cited by:  Papers (59)  |  Patents (5)
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A novel ultrawideband (UWB) printed wide-slot antenna is presented. The design is based on the planar inverted cone antenna (PICA), introduced by Suh. The presented design comprises PICA-like structures, etched from a double-layer substrate. Compared to the original PICA, it is lower in profile, more compact and maintains comparable performance. A prototype integrated in a printed circuit board an... View full abstract»

• ### Size Reduction of a Low-Profile Spiral Antenna Using Inductive and Dielectric Loading

Publication Year: 2008, Page(s):22 - 25
Cited by:  Papers (34)  |  Patents (2)
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This letter discusses a miniature low profile ultrawideband (UWB) spiral. The antenna is miniaturized using a combination of dielectric and inductive loading. In addition, a ferrite coated ground plane is adopted in place of the traditional metallic ground plane for profile reduction. Using full-wave simulations and measurements, it is shown that the miniaturized spiral can achieve similar perform... View full abstract»

• ### Artificial Neural Network and Analytical Method-Based Control of Higher Harmonic Radiation From Active Antenna Arrays

Publication Year: 2008, Page(s):26 - 30
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The mean-square error (MSE) criterion combined with the Lagrange method and an artificial neural network (ANN) technique are proposed for the reduction of the radiation of the higher harmonic signals generated in active antenna arrays. View full abstract»

• ### Accurate Design Method for Pyramidal Horns of Any Desired Gain and Aperture Phase Error

Publication Year: 2008, Page(s):31 - 32
Cited by:  Papers (6)
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An exact solution is presented for the fourth-order polynomial representing the general horn design problem. When the available approximations are used for the gain reduction factors, this leads to closed-form expressions for the aperture, and hence the other, dimensions of the pyramidal horn of any desired gain and aperture phase error. View full abstract»

• ### Analytical Approach to the Backscattering from UHF RFID Transponder

Publication Year: 2008, Page(s):33 - 35
Cited by:  Papers (55)
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The investigation of the modulated, backscattered contribution from UHF RFID Transponders is a crucial issue for the reliable evaluation of the behavior and the performance of RFID systems. The backscattered, radiated field by a UHF Transponder is described by means of a simple and complete analytical expression. The tag radar cross section (RCS) and the bit error rate (BER) at the Reader are eval... View full abstract»

• ### Efficient Solution of the Electric-Field Integral Equation Using the Iterative LSQR Algorithm

Publication Year: 2008, Page(s):36 - 39
Cited by:  Papers (8)
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In this letter, we consider iterative solutions of the three-dimensional electromagnetic scattering problems formulated by surface integral equations. We show that solutions of the electric-field integral equation (EFIE) can be improved by employing an iterative least-squares QR (LSQR) algorithm. Compared to many other Krylov subspace methods, LSQR provides faster convergence and it becomes an alt... View full abstract»

• ### A Widely Tunable Compact Patch Antenna

Publication Year: 2008, Page(s):40 - 42
Cited by:  Papers (82)  |  Patents (1)
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In this letter, we propose a tunable patch antenna made of a slotted rectangular patch loaded by a number of posts close to the patch edge. The posts are short circuited to the ground plane via a set of PIN diode switches. Simulations and measurements verify the possibility of tuning the antenna in subbands from 620 to 1150 MHz. Good matching has been achieved over most of the bands. Other perform... View full abstract»

• ### Accurate Representation of the Edge Behavior of Current When Using PO-Derived Characteristic Basis Functions

Publication Year: 2008, Page(s):43 - 45
Cited by:  Papers (11)
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A procedure for accurate solution of scattering problems involving geometries with sharp edges by using physical optics-based characteristic basis functions, which themselves do not possess edge singularities, is presented in this communication. Our strategy is to employ special types of blocks that contain the free edges of the object, within which we can accurately represent the behaviors of the... View full abstract»

• ### On the Relationship Between the Time-Domain and Frequency-Domain TLM Methods

Publication Year: 2008, Page(s):46 - 49
Cited by:  Papers (6)
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The time- and frequency-domain transmission line matrix (TLM) methods have been developed and shown to be effective and powerful in solving electromagnetic problems. However, their direct relationship has not been clearly described so far. In this letter, we show that if a time-domain TLM method is developed, its corresponding frequency-domain counterpart can also be obtained through the discrete ... View full abstract»

• ### Unidirectional Antenna With Loaded Dielectric Substrate

Publication Year: 2008, Page(s):50 - 53
Cited by:  Papers (5)  |  Patents (1)
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A unidirectional antenna with loaded dielectric substrate composed of two shorted-circuited rectangular patches and a printed Gamma-shaped probe feed operated at 2.5 GHz is presented. The antenna is fully filled with dielectric substrate isinr = 2.65. The height of the antenna is only 18 mm. A wide impedance bandwidth of 45.3% (SWR les 2) is achieved. The average gain is about 6.7 dBi. ... View full abstract»

• ### Aperiodic-Tiling-Based Mushroom-Type High-Impedance Surfaces

Publication Year: 2008, Page(s):54 - 57
Cited by:  Papers (1)
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This letter deals with a study of aperiodically ordered textured (mushroom-type) high-impedance surfaces (HISs), and their possible application as artificial-magnetic-conductor ground-planes for low-profile directive antennas. In this framework, results from full-wave simulations are presented in order to characterize the electromagnetic response (in terms of impedance matching, directivity, and s... View full abstract»

• ### Characteristics Estimation for Jerusalem Cross-Based Artificial Magnetic Conductors

Publication Year: 2008, Page(s):58 - 61
Cited by:  Papers (34)  |  Patents (1)
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This letter proposes a circuit model capable of predicting the bandwidth and resonance frequency of a well-known artificial magnetic conductor (AMC). The AMC is composed of an array of Jerusalem cross-shaped frequency selective surfaces (FSSs) (JC-FSS) deployed on a thin PEC-backed dielectric slab. The model benefits from the static (Quasi-TEM) closed-form equations, available in literature for th... View full abstract»

• ### Low-Profile Loop-Shaped Inverted-F Wire Antenna With Dual-Mode Operation

Publication Year: 2008, Page(s):62 - 65
Cited by:  Papers (3)
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In this letter, we propose a new structure for a dual-mode antenna. We introduce a loop-shaped inverted-F wire antenna (LIFA) that has small and low-profile structure and uses a parasitic element (PE) within the feeding element for the additional resonance mode. We present a theoretical discussion on the dual-resonance operation and investigate the characteristics along some dimensional parameters... View full abstract»

• ### The $kappa-mu$ Distribution Applied to the Analysis of Fading in Body to Body Communication Channels for Fire and Rescue Personnel

Publication Year: 2008, Page(s):66 - 69
Cited by:  Papers (27)
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In this letter, we perform a novel characterization of the fading experienced in body to body communications channels for fire and rescue personnel using the recently proposed kappa - mu distribution. A transmitter positioned on the lead fire person and four strategically placed, time-synchronized 2.45-GHz receivers situated on the protective helmet and shoulders of another team member allowed sma... View full abstract»

• ### Computation of the Physical Optics Integral on NURBS Surfaces Using a Radon Transform Interpretation

Publication Year: 2008, Page(s):70 - 73
Cited by:  Papers (16)
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Physical optics (PO) requires the calculation of a surface integral on a structure, which can be called as the PO integral. The surface of most structures can be accurately represented by nonuniform rational B-spline (NURBS) surfaces. In this letter, the PO integral over NURBS surfaces is reduced to an exact line integral by using a Radon transform (RT) interpretation. The integration line is show... View full abstract»

• ### Effective Propagation Properties of an Enhanced Hybrid EBG/Ferrite Ground Plane

Publication Year: 2008, Page(s):74 - 77
Cited by:  Papers (8)
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An enhanced ultrawideband and low-profile hybrid electromagnetic bandgap (EBG)/ferrite ground plane design is presented that offers an increased bandwidth and reduced profile compared to the previously presented hybrid EBG/ferrite ground plane design. Reflectivity and phase analyses of the new hybrid ground plane design indicate an instantaneous and continuous operational bandwidth exceeding 40:1 ... View full abstract»

• ### Simple and Accurate Two-Dimensional Angle Estimation for a Single Source With Uniform Circular Array

Publication Year: 2008, Page(s):78 - 80
Cited by:  Papers (12)
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A least squares algorithm for two-dimensional (2-D) angle estimation of a single narrowband source impinging on a uniform circular array (UCA) is presented. Utilizing the centrosymmetric array configuration, a new correlation-based method is devised to obtain closed-form estimates of the azimuth and elevation angles. Although the proposed method is computationally simpler than the conventional sch... View full abstract»

• ### A Low-Cost Patch Antenna Phased Array With Analog Beam Steering Using Mutual Coupling and Reactive Loading

Publication Year: 2008, Page(s):81 - 84
Cited by:  Papers (31)
| | PDF (167 KB) | HTML

In this letter, a low-cost patch antenna phased array is demonstrated with analog beam steering without using phase shifters. This novel technique can greatly reduce the cost of a phased-array system and will enable the wide-scale deployment of phased arrays in low-end commercial products. In the presented three-element phased array, the center (driven) antenna is fed by an RF source and the two n... View full abstract»

• ### Half-Mode Substrate Integrated Waveguide (HMSIW) Leaky-Wave Antenna for Millimeter-Wave Applications

Publication Year: 2008, Page(s):85 - 88
Cited by:  Papers (70)
| | PDF (630 KB) | HTML

A novel leaky-wave antenna is demonstrated and developed at Ka-band in this work based on the newly proposed half-mode substrate integrated waveguide (HWSIW). This antenna is accurately simulated by using a full-wave electromagnetic simulator and then fabricated through a single-layer printed circuit board (PCB) process. Wide bandwidth and a quasi-omnidirectional radiation pattern are obtained. Th... 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