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IEEE Transactions on Antennas and Propagation

Issue 6  Part 2 • June 2011

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Publication Year: 2011, Page(s):C1 - 2069
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• IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2011, Page(s): C2
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• Focus-Scanning Leaky-Wave Antenna With Electronically Pattern-Tunable Scatterers

Publication Year: 2011, Page(s):2070 - 2077
Cited by:  Papers (7)
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A focus-scanning leaky-wave antenna is proposed. It is based on evanescent wave scattering by electronically pattern tunable scatterers fabricated of fine cascade connections of field effect transistors (FETs). The focus is tailored by switching the FETs so that numbers of the scattered waves cause constructive interference at the target point. Our prototype achieved focus-scanning at 2.4 GHz. The... View full abstract»

• Leakage-Reduced Conductor-Backed Coplanar Waveguide With Periodic Structures and its Antenna Application

Publication Year: 2011, Page(s):2078 - 2086
Cited by:  Papers (1)
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A simple method is described where the need of via holes is not required to suppress the inherent leakage of a conductor-backed coplanar waveguide (CBCPW). Pairs of slots are periodically etched on the side ground planes in close proximity to the central signal line. When one period of the structure is considered as a coupled-line section, it provides an open-open boundary condition leading to the... View full abstract»

• A Printed Leaky-Wave Antenna Based on a Sinusoidally-Modulated Reactance Surface

Publication Year: 2011, Page(s):2087 - 2096
Cited by:  Papers (85)  |  Patents (5)
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A simple procedure for designing a sinusoidally-modulated reactance surface (SMRS) that radiates at an arbitrary off-broadside angle is outlined. The procedure allows for nearly independent control of the leakage and phase constants along the surface. Printing an array of metallic strips over a grounded dielectric substrate is discussed as a way to practically implement the theoretical SMRS. A met... View full abstract»

• Concept Study of a Shorted Annular Patch Antenna: Design and Fabrication on a Conducting Cylinder

Publication Year: 2011, Page(s):2097 - 2102
Cited by:  Papers (7)
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This paper presents the shorted annular patch (SAP) antenna on an electrically conducting cylinder. The SAP antenna has been credited with superior multipath suppressing properties which makes it interesting for global navigation satellite system (GNSS) applications. GNSS applications demand integration of filters and low noise amplifiers as close to the radiating structure as possible. To this go... View full abstract»

• Broadband Design of Circularly Polarized Microstrip Patch Antenna Using Artificial Ground Structure With Rectangular Unit Cells

Publication Year: 2011, Page(s):2103 - 2110
Cited by:  Papers (41)
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This paper presents a broadband circularly polarized patch antenna using an artificial ground (AG) structure with rectangular unit cells as a reflector. The AG structure changes the reflection phase in accordance with the polarization state of the incident wave. By properly combining the transmitted wave from the antenna and the reflected wave from the AG structure, broadband circular polarization... View full abstract»

• Spherical Fidelity Patterns of UWB Antennas

Publication Year: 2011, Page(s):2111 - 2119
Cited by:  Papers (20)
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The time domain radiation properties of UWB antennas are analyzed, especially the angular dependent impulse distortion, with respect to the signal transmitted in the main beam direction, is investigated. The correlation properties of the radiated pulses are determined by the so called fidelity F. The fidelity F is together with the peak pulse amplitude P a powerful tool for th... View full abstract»

• A Novel Method of Conductivity Measurements for Carbon-Fiber Monopole Antenna

Publication Year: 2011, Page(s):2120 - 2126
Cited by:  Papers (6)
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The relation between loss resistance and conductivity for monopole antennas over a ground plane is derived. Its accuracy was confirmed by good agreement between it and finite element and method of moments simulations. This relation may be used to calculate conductivity of any material that radiates. A Wheeler Cap system was setup. System losses were determined by equating the loss resistance of a ... View full abstract»

• A Compressed Sensing Approach for Array Diagnosis From a Small Set of Near-Field Measurements

Publication Year: 2011, Page(s):2127 - 2133
Cited by:  Papers (36)
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A technique for array diagnosis using a small number of measured data acquired by a near-field system is proposed. The technique, inspired by some recent results in the field of compressed sensing, requires the preliminary measurement of a failure-free reference array. The linear system relating the difference between the field measured using the reference array and the field radiated by the array... View full abstract»

• A Ball Grid Array Package With a Microstrip Grid Array Antenna for a Single-Chip 60-GHz Receiver

Publication Year: 2011, Page(s):2134 - 2140
Cited by:  Papers (35)
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This paper presents the design of a ball grid array package and more importantly describes the integration of a microstrip grid array antenna in the package in a low temperature cofired ceramic (LTCC) technology for a single-chip 60-GHz receiver. The grid array package has a small volume of 13.5 × 8 × 1.265 mm3 and can house a 60-GHz receiver die of current size. The packa... View full abstract»

• Beamforming by Left-Handed Extraordinary Transmission Metamaterial Bi- and Plano-Concave Lens at Millimeter-Waves

Publication Year: 2011, Page(s):2141 - 2151
Cited by:  Papers (24)
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A deep analysis of bi- and plano-concave lens made of stacked subwavelength hole arrays in terms of focus and angular power distribution is presented. The key difference between these left-handed extraordinary transmission lenses (LHET-lenses) and the classical metallic lenses is based on the fact that contrary to the latter ones, LHET-lenses work in the cut-off region of the circular waveguide fo... View full abstract»

• Focal Array Fed Dielectric Lenses: An Attractive Solution for Beam Reconfiguration at Millimeter Waves

Publication Year: 2011, Page(s):2152 - 2159
Cited by:  Papers (11)  |  Patents (1)
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We investigate the radiation capabilities of focal array fed dielectric lens antennas using the FDTD method. Several relevant configurations sharing the same lens architecture (namely an extended hemispherical lens coated with a quarter wavelength matching layer), but illuminated by different sub-array topologies, are compared. In particular, we study the impact of the feeding amplitude coefficien... View full abstract»

• Novel Terahertz Antenna Based on a Silicon Lens Fed by a Leaky Wave Enhanced Waveguide

Publication Year: 2011, Page(s):2160 - 2168
Cited by:  Papers (24)
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We introduce a novel antenna concept suitable for future integrated arrays at terahertz frequencies. The antenna consists of an extended hemispherical lens antenna fed by a leaky wave waveguide feed that can be integrated with sensors and detectors such as Schottky diodes. In this antenna architecture, a couple of TE/TM leaky wave modes are excited in a resonant cavity formed by a waveguide openin... View full abstract»

• Electromagnetic Wave Diffraction by Semi-Infinite Strip Grating

Publication Year: 2011, Page(s):2169 - 2177
Cited by:  Papers (5)
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A nonlinear operator equation in terms of the operator of reflection by a plane periodic semi-infinite grating of thin metal strips is obtained for the H-polarized electromagnetic wave incidence. This equation is solved numerically for an incident plane wave. The algorithm created allows the solution of a nonlinear operator equation in the Fourier amplitude of the reflected field with the method o... View full abstract»

• Dipole Excitation of Periodic Metallic Structures

Publication Year: 2011, Page(s):2178 - 2187
Cited by:  Papers (16)
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The excitation of a periodic structure composed of two- or three-dimensional metallic scatterers by a finite dipole source is studied through the application of the Array Scanning Method. The difficulties in the numerical implementation are discussed in details, providing general guidelines and suggesting a useful preprocessing procedure to determine the number of quadrature points needed in the i... View full abstract»

• Accurate Bloch Analysis of 1-D Periodic Lines Through the Simulation of Truncated Structures

Publication Year: 2011, Page(s):2188 - 2195
Cited by:  Papers (17)
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A common approach to perform dispersive analyses of waveguides periodic along one direction is based on the electromagnetic simulation of a single spatial period of the structure. However, the resulting equivalent two-port network representation of the single cell may lead to inaccurate modal results, since mutual coupling between cells has been neglected. When a finite number of adjacent cells ar... View full abstract»

• Physical Bounds and Sum Rules for High-Impedance Surfaces

Publication Year: 2011, Page(s):2196 - 2204
Cited by:  Papers (21)
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High-impedance surfaces are artificial surfaces synthesized from periodic structures. The high impedance is useful as it does not short circuit electric currents and reflects electric fields without phase shift. Here, a sum rule is presented that relates frequency intervals having high impedance with the thickness of the structure. The sum rule is used to derive physical bounds on the bandwidth fo... View full abstract»

• Power Stored and Quality Factors in Frequency Selective Surfaces at THz Frequencies

Publication Year: 2011, Page(s):2205 - 2216
Cited by:  Papers (5)
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A study of the external, loaded and unloaded quality factors for frequency selective surfaces (FSSs) is presented. The study is focused on THz frequencies between 5 and 30 THz, where ohmic losses arising from the conductors become important. The influence of material properties, such as metal thickness, conductivity dispersion and surface roughness, is investigated. An equivalent circuit that mode... View full abstract»

• Simple Procedure to Derive Lower Bounds for Radiation $Q$ of Electrically Small Devices of Arbitrary Topology

Publication Year: 2011, Page(s):2217 - 2225
Cited by:  Papers (28)
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A new and simple technique is presented to derive absolute lower bounds for the radiation Q of electrically small radiating devices. In contrast to many other techniques available in open literature, the new technique is applicable to any topology. It does not rely on defining a canonical volume, like for example a sphere or an ellipsoide, around the antenna, nor is it based on the scattering prop... View full abstract»

• Boundary Effects on the Determination of Metamaterial Parameters From Normal Incidence Reflection and Transmission Measurements

Publication Year: 2011, Page(s):2226 - 2240
Cited by:  Papers (32)
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A method is described for the determination of the effective electromagnetic parameters of a metamaterial based only on external measurements or simulations, taking boundary effects at the interfaces between a conventional material and metamaterial into account. Plane-wave reflection and transmission coefficients at the interfaces are regarded as additional unknowns to be determined, rather than e... View full abstract»

• Microwave Bessel Beams Generation Using Guided Modes

Publication Year: 2011, Page(s):2241 - 2247
Cited by:  Papers (17)
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A novel method is devised for Bessel beams generation in the microwave regime. The beam is decomposed in terms of a number of guided transverse electric modes of a metallic waveguide. Modal expansion coefficients are computed from the modal power orthogonality relation. Excitation is achieved by means of a number of inserted coaxial loop antennas, whose currents are calculated from the excitation ... View full abstract»

• Stability Analysis and Improvement of the Conformal ADI-FDTD Methods

Publication Year: 2011, Page(s):2248 - 2258
Cited by:  Papers (3)
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In order to model curved conducting boundaries with high accuracy, conformal alternating direction implicit finite-difference time-domain (ADI-FDTD) methods have been developed with applications of Dey-Mittra's and Yu-Mittra's conformal techniques. We show that the conformal ADI-FDTD methods developed as such lose the unconditional stability although it is expected with the ADI schemes. We present... View full abstract»

• Implicit ID-FDTD Algorithm Based on Crank-Nicolson Scheme: Dispersion Relation and Stability Analysis

Publication Year: 2011, Page(s):2259 - 2267
Cited by:  Papers (5)
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A new implicit isotropic-dispersion finite difference time domain (ID-FDTD) algorithm is proposed, which is formulated based on the Crank-Nicolson (CN) implicit scheme. The update equation of the new scheme is given for a three dimension (3D) problem and a general lossy medium including electric and magnetic losses. The dispersion relation of the CN ID-FDTD scheme is obtained based on the eigen-an... View full abstract»

• FDTD Modeling of Dispersive Bianisotropic Media Using Z-Transform Method

Publication Year: 2011, Page(s):2268 - 2279
Cited by:  Papers (7)
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The finite-difference time-domain (FDTD) technique for simulating electromagnetic wave interaction with a dispersive chiral medium is extended to include the simulation of dispersive bianisotropic media. Due to anisotropy and frequency dispersion of such media, the constitutive parameters are represented by frequency-dependent tensors. The FDTD is formulated using the Z-transform method, a convent... View full abstract»

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

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Editor-in-Chief                                             Danilo Erricolo