# IEEE Transactions on Antennas and Propagation

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Displaying Results 1 - 25 of 73

Publication Year: 2012
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• ### IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2012, Page(s): C2
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• ### A Wideband Magneto-Electric Dipole Antenna

Publication Year: 2012, Page(s):4987 - 4991
Cited by:  Papers (31)
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A new wideband magneto-electric dipole antenna composed of a horizontal bowtie electric dipole and a vertically oriented folded shorted patch antenna is designed. The antenna is excited by a stair-shaped probe feed without the need of an additional balun. A prototype was fabricated and measured. Results show that an impedance bandwidth of 95.2%, with View full abstract»

• ### A Design of Dual-Frequency Dual-Sense Circularly-Polarized Slot Antenna

Publication Year: 2012, Page(s):4992 - 4997
Cited by:  Papers (19)
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A single-feed dual-frequency dual-sense circularly-polarized (CP) printed slot antenna etched on a single substrate is proposed. This antenna is composed of an annular slot and a cross slot, which produce two different frequency bands. The lower band and the upper band are controlled by the annular slot and the cross slot respectively. By introducing asymmetry on both annular slot and cross slot, ... View full abstract»

• ### A Circularly-Polarized Isoflux Antenna Based on Anisotropic Metasurface

Publication Year: 2012, Page(s):4998 - 5009
Cited by:  Papers (89)
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Theory, design, realization and measurements of an X-band isoflux circularly polarized antenna for LEO satellite platforms are presented. The antenna is based on a metasurface composed by a dense texture of sub-wavelength metal patches on a grounded dielectric slab, excited by a surface wave generated by a coplanar feeder. The antenna is extremely flat (1.57 mm) and light (less than 1 Kg) and repr... View full abstract»

• ### High-Efficiency Elliptical Slot Antennas With Quartz Superstrates for Silicon RFICs

Publication Year: 2012, Page(s):5010 - 5020
Cited by:  Papers (28)  |  Patents (2)
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To increase the efficiency of on-chip patch and slot antennas, a single-layer superstrate is proposed. An analytical model to calculate the radiation efficiency is presented, and a detailed design approach is described. This antenna was implemented at W-band in the IBM CMOS8RF (0.13 $mu {rm m}$) process. The measured antenna result... View full abstract»

• ### Compact Wideband Multimode Dielectric Resonator Antennas Fed With Parallel Standing Strips

Publication Year: 2012, Page(s):5021 - 5031
Cited by:  Papers (19)
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As the number of resonances increases, it becomes difficult to improve and maintain the performance of dielectric resonator antennas (DRAs), over the expanded impedance bandwidth. To remove unwanted modes, adjust the frequency distance between individual modes, reduce antenna size and cross polarization, and preserve radiation patterns in a wideband configuration, a dielectric resonator antenna fe... View full abstract»

• ### Superior Modes in High Permittivity Cylindrical Dielectric Resonator Antenna Excited by a Central Rectangular Slot

Publication Year: 2012, Page(s):5032 - 5038
Cited by:  Papers (12)
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High permittivity materials allow good miniaturization of microwave components, but the dielectric resonator antenna using these materials has the drawback of a reduced bandwidth. To overcome this disadvantage we wanted to obtain a relatively wideband high permittivity DRA using the superior modes. Using HFSS simulations, we identified some of the superior modes that appear in cylindrical DRAs sit... View full abstract»

• ### Circular/Linear Polarization Reconfigurable Antenna on Simplified RF-MEMS Packaging Platform in K-Band

Publication Year: 2012, Page(s):5039 - 5045
Cited by:  Papers (22)
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A linear-polarization (LP)/circular-polarization (CP) switchable reconfigurable antenna using a radio frequency micro-electro-mechanical-system (RF-MEMS) switch is proposed and a novel package platform is introduced. Since the package substrate of the novel package platform is used as a radiation aperture substrate of the antenna structure, the fabrication process can be simplified, and degradatio... View full abstract»

• ### Electronically Steerable 1-D Fabry-Perot Leaky-Wave Antenna Employing a Tunable High Impedance Surface

Publication Year: 2012, Page(s):5046 - 5055
Cited by:  Papers (51)
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A novel fixed-frequency electronically-steerable one-dimensional (1-D) leaky-wave antenna is presented. The antenna is based on a parallel-plate waveguide loaded with a planar partially reflective surface and a tunable high impedance surface (HIS), which creates a 1-D Fabry-Perot leaky-waveguide. The tunable HIS consists of printed patches loaded with varactor diodes that allow the electronic tuni... View full abstract»

• ### Multilayered Composite Right/Left-Handed Leaky-Wave Antenna With Consistent Gain

Publication Year: 2012, Page(s):5056 - 5062
Cited by:  Papers (29)
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A multilayered composite right/left-handed (CRLH) based leaky-wave antenna is proposed for the continuous beam scanning from backward to forward direction with consistent gain. The antenna comprises a substrate integrated waveguide (SIW) with an array of the CRLH unit cells. The CRLH unit cell is formed by a slot cut on the upper ground of the SIW, and a parasitic patch beneath the slot. The anten... View full abstract»

• ### Broadband High Directivity Multibeam Emission Through Transformation Optics-Enabled Metamaterial Lenses

Publication Year: 2012, Page(s):5063 - 5074
Cited by:  Papers (24)
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A new broadband two- and three-dimensional, polarization independent coordinate transformation is introduced that is capable of mapping the radiation from an embedded omnidirectional source into any desired number of highly directive beams pointed in arbitrary directions. This transformation requires anisotropic materials, yet is spatially invariant and thereby can be readily implemented by curren... View full abstract»

• ### Printed Magnetoinductive-Wave (MIW) Delay Lines for Chipless RFID Applications

Publication Year: 2012, Page(s):5075 - 5082
Cited by:  Papers (18)
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A novel fully passive and electromagnetic chipless radiofrequency identification (RFID) system is proposed. The system is based on printed tags implemented with magnetoinductive-wave (MIW) delay lines. Such lines are composed of a periodic array of coupled square split ring resonators (SSRRs) and propagate slow waves. The tag is codified by introducing reflectors (which provide the identification ... View full abstract»

• ### Dielectric Tube Antennas for Industrial Radar Level Gauging

Publication Year: 2012, Page(s):5083 - 5091
Cited by:  Papers (4)
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This paper concerns dielectric tube antenna design in the frequency range from 8.5 to 10.5 GHz for the use in the field of industrial radar level gauging for process automation industry. The application is based on monostatic radar configurations, which thus demands for highly directive endfire antennas made of chemically inert dielectrics, such as polytetrafluoroethylene (PTFE) or polypropylene (... View full abstract»

• ### Polya Elements With Application to Antennas, Thin Absorbers and Filters

Publication Year: 2012, Page(s):5092 - 5099
Cited by:  Papers (1)
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This article introduces the 2-D Polya fractal and its evolution into the modified Polya curve (MPC). The MPC is assigned a linewidth, which, together with the MPC order and shaping factor, provides optimization parameters for specific device applications. The MPCs are selected to generate useful shapes that fit within a chosen triangular envelope. These are applied as basis elements and are employ... View full abstract»

• ### Multi-Port Network Approach for the Analysis of Dual Band Fractal Microstrip Antennas

Publication Year: 2012, Page(s):5100 - 5106
Cited by:  Papers (11)
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The multiport network approach is extended to analyze the behavior of microstrip fractal antennas. The capacitively fed microstrip square ring antenna has the side opposite to the feed arm replaced with a fractal Minkowski geometry. Dual frequency operation is achieved by suitably choosing the indentation of this fractal geometry. The width of the two sides adjacent to this is increased to further... View full abstract»

• ### Efficient Combined Array Thinning and Weighting for Pattern Synthesis With a Nested Optimization Scheme

Publication Year: 2012, Page(s):5107 - 5117
Cited by:  Papers (6)
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A novel procedure to thin an antenna array which synthesizes a desired pattern with the minimum number of active elements is introduced. The proposed method yields both the active elements and their corresponding excitations of a thinned array having the minimum number of active elements needed to meet several prescribed design specifications of the radiated far-field pattern. Specifications such ... View full abstract»

• ### Novel Dual-Band Decoupling Network for Two-Element Closely Spaced Array Using Synthesized Microstrip Lines

Publication Year: 2012, Page(s):5118 - 5128
Cited by:  Papers (21)  |  Patents (1)
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We investigate an innovative decoupling network for dual-band two-element closely spaced arrays in MIMO applications. The new architecture, combining the reactive element decoupling technique and the eigenmode feed network, provides dual-band decoupling with good radiation characteristics and power balance between the modes. The core block of the decoupling network is a dual-mode 180-degree hybrid... View full abstract»

• ### Effective Beam Forming Networks for Large Arbitrary Array of Antennas

Publication Year: 2012, Page(s):5129 - 5135
Cited by:  Papers (1)
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A deterministic and effective strategy to reduce as much as possible the number of amplitude controls points in large arrays is herein proposed, and applied to cases of practical interest. The proposed strategy exploits two important concepts: the first one, coming from a special class of aperiodic tiling, and the second one based on NuFFT – Non uniform Fast Fourier Transform – techn... View full abstract»

• ### Broadband Multiple Cone-Beam 3-D IIR Digital Filters Applied to Planar Dense Aperture Arrays

Publication Year: 2012, Page(s):5136 - 5146
Cited by:  Papers (16)
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A digital beamformer that can synthesize array factors (AFs) with multiple, ultrawideband (UWB), frequency-independent beams at lower computational complexity is proposed. The beamformer is based on a novel 3-D infinite impulse response (IIR) transfer function $H_{rm MC}left({bf z}right)$ having multiple cone-shaped passbands in the... View full abstract»

• ### Efficiency Measurement of Connected Arrays Using the Improved Wheeler Cap Method

Publication Year: 2012, Page(s):5147 - 5156
Cited by:  Papers (4)
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We present a method for measuring antenna efficiency of connected arrays. The method is a modified version of the improved Wheeler cap (IWC) method where the antenna under test (AUT) is electrically connected to two walls of the Wheeler Cap which simulates array connection. Theoretical analyses based on plane wave and cylindrical wave problems and numerical simulations using HFSS and FEKO are pres... View full abstract»

• ### Comparison of Correction Techniques and Analysis of Errors for Digital Beamforming Antenna Array With Single RF Receiver

Publication Year: 2012, Page(s):5157 - 5163
Cited by:  Papers (5)
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A new correction method is proposed for the single RF channel digital beamforming (DBF) antenna array. In this array, each array element is followed by a $0/pi$ phase shifter, and the element outputs can be recovered by the single channel through the time sequence phase weighting (TSPW) technique. The outputs can be used to form des... View full abstract»

• ### Towards Experimental Perfectly-Matched Layers With Ultra-Thin Metamaterial Surfaces

Publication Year: 2012, Page(s):5164 - 5172
Cited by:  Papers (20)
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In this paper, we modify uniaxial perfectly matched layer to an entirely passive medium and demonstrate its experimental realization using a deep sub-wavelength metamaterial surface. The relative permittivity and permeability of the surface are matched, mostly imaginary-valued, and far greater than unity. These conditions allow the impedance of the metamaterial surface to be completely matched to ... View full abstract»

• ### Use of Generalized Sheet Transition Conditions to Model Guided Waves on Metasurfaces/Metafilms

Publication Year: 2012, Page(s):5173 - 5186
Cited by:  Papers (26)
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We use generalized sheet transition conditions (GSTCs) to investigate the existence of guided waves (both surface waves and complex modes) on a metafilm: a surface distribution of electrically small scatterers characterized by electric and magnetic surface susceptibilities. In this paper, excitation of a metafilm by both electric and magnetic line currents is investigated. The characteristics of t... View full abstract»

• ### Iterative On-Surface Discretized Boundary Equation Method for 2-D Scattering Problems

Publication Year: 2012, Page(s):5187 - 5194
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The recently developed on-surface discretized boundary equation (OS-DBE) method has low memory requirement and is very suitable for parallel computing because the current at each point can be independently evaluated with a matrix of much smaller order than that in the method of moments (MoM) for electrically large objects. However, repeated solutions of the matrix equation in generating the whole ... View full abstract»

## Aims & Scope

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

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## Meet Our Editors

Editor-in-Chief                                             Danilo Erricolo