# IEEE Transactions on Antennas and Propagation

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Displaying Results 1 - 25 of 49

Publication Year: 2010, Page(s):C1 - 2165
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• ### IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2010, Page(s): C2
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• ### Editorial – Looking Back on the Past Six Years

Publication Year: 2010, Page(s):2166 - 2168
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• ### Polymer-Carbon Nanotube Sheets for Conformal Load Bearing Antennas

Publication Year: 2010, Page(s):2169 - 2175
Cited by:  Papers (42)
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We propose a conductive carbon nanotube (CNT) sheet to realize conformal antennas on polymer substrates. Polymer-ceramic composites (rubber-like structures) have good RF (high dielectric constant and low loss tangent) and desirable mechanical properties (conformal, flexible and lightweight). However, there is a challenge in printing metallization circuits on polymer substrates due to their hydroph... View full abstract»

• ### A Compact Wideband Leaky-Wave Antenna With Etched Slot Elements and Tapered Structure

Publication Year: 2010, Page(s):2176 - 2183
Cited by:  Papers (9)
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A compact wideband leaky-wave antenna (LWA) with etched slot elements and tapered structure is studied. The proposed antenna is composed of an asymmetric-fed multi-section tapered short leaky-wave antenna with two embedded slots and a ground plane with etched slot elements. Base on the concept of LWA, the asymmetric-fed is utilized to excite the first higher order mode. By etching slot elements on... View full abstract»

• ### A Modified Bow-Tie Antenna for Improved Pulse Radiation

Publication Year: 2010, Page(s):2184 - 2192
Cited by:  Papers (26)
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The analysis, design, and realization of a modified bow-tie antenna optimized for impulse ground penetrating radar (GPR) applications is described. The proposed antenna shows improved properties important for GPR, which include its compact size (in comparison with a conventional bow-tie antenna) and ability to radiate UWB pulses with increased amplitude and very small late-time ringing. A substant... View full abstract»

• ### A Compact Parallel-Plane Perpendicular-Current Feed for a Modified Equiangular Spiral Antenna

Publication Year: 2010, Page(s):2193 - 2202
Cited by:  Papers (17)
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The design and measurement is described of a compact (59.94 mm × 59.94 mm × 1.14 mm) bidirectional ultrawideband modified equiangular spiral antenna with an integrated feed internally matched to a 50-Ohm microstrip transmission line. An ultrawideband transition from microstrip to parallel-strip line soldered to a short (1.14 mm) twin-line transmission line feeds the spiral. The curre... View full abstract»

• ### A Broadband Folded Printed Quadrifilar Helical Antenna Employing a Novel Compact Planar Feeding Circuit

Publication Year: 2010, Page(s):2203 - 2209
Cited by:  Papers (26)  |  Patents (1)
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A broadband printed quadrifilar helical antenna employing a novel compact feeding circuit is proposed in this paper. This antenna presents an excellent axial ratio over a wide beamwidth, with a 29% bandwidth. A specific feeding circuit based on an aperture-coupled transition and including two 90° surface mount hybrids has been designed to be integrated with the quadrifilar antenna. Over the... View full abstract»

• ### Low-Q Electrically Small Spherical Magnetic Dipole Antennas

Publication Year: 2010, Page(s):2210 - 2217
Cited by:  Papers (53)
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Three novel electrically small antenna configurations radiating a TE10 spherical mode corresponding to a magnetic dipole are presented and investigated: multiarm spherical helix (MSH) antenna, spherical split ring resonator (S-SRR) antenna, and spherical split ring (SSR) antenna. All three antennas are self-resonant, with the input resistance tuned to 50 ohms by an excitation curved dip... View full abstract»

• ### Modeling, Design and Characterization of a Very Wideband Slot Antenna With Reconfigurable Band Rejection

Publication Year: 2010, Page(s):2218 - 2226
Cited by:  Papers (45)
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An antenna exhibiting a very wide bandwidth with reconfigurable rejection within the band is presented. The proposed topology is versatile in terms of the number of available antenna states and location of the rejection frequencies, and also allows the operation of the antenna in an “all-pass” state. First, a physical interpretation of the rejection mechanism and its corresponding ci... View full abstract»

• ### Frequency Selective Surfaces and Their Applications for Nimble-Radiation Pattern Antennas

Publication Year: 2010, Page(s):2227 - 2237
Cited by:  Papers (33)
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Two different active frequency selective screens are proposed to develop a new class of reconfigurable-agile radiation-pattern antennas. High frequency PIN-Diodes are precisely incorporated into the screens to reconfigure electromagnetic (EM) response of the surfaces imitating blocking-transparent window for the incident EM waves. The DC-feed loading in the first screen and the PIN-Diode parasitic... View full abstract»

• ### UWB, Non Dispersive Radiation From the Planarly Fed Leaky Lens Antenna— Part 1: Theory and Design

Publication Year: 2010, Page(s):2238 - 2247
Cited by:  Papers (64)
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An efficient directive antenna is described that can be used to realize essentially non dispersive links over extremely large bandwidths. The antenna is a significantly enhanced version of previously proposed Leaky Lens antennas that use a frequency independent leaky slot radiation mechanism. A theoretical breakthrough now allows the use of this mechanism also in the presence of purely planar stru... View full abstract»

• ### UWB, Non Dispersive Radiation From the Planarly Fed Leaky Lens Antenna—Part II: Demonstrators and Measurements

Publication Year: 2010, Page(s):2248 - 2258
Cited by:  Papers (30)
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We provide for the first time the experimental characterization of a planarly fed ultrawideband leaky lens antenna. The paper includes the description and the experimental characterization of two antenna prototypes with radiating element realized in printed circuit board technology. The impedance parameters and the radiation patterns of the antennas have been measured showing excellent pattern qua... View full abstract»

• ### Beamsteering in Pattern Reconfigurable Arrays Using Directional Modulation

Publication Year: 2010, Page(s):2259 - 2265
Cited by:  Papers (50)
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An array with pattern-reconfigurable elements is used to generate a digital modulation by switching the elements for every symbol. This technique is known as directional modulation. Because the modulation is generated at the antenna level, it gives control over the directions in which data is sent, unlike baseband modulation which transmits the same data in all directions at different power levels... View full abstract»

• ### Analysis and Design of $E$-Plane Scanning Grid Arrays

Publication Year: 2010, Page(s):2266 - 2274
Cited by:  Papers (5)
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A quasi-optical beam steering multilayer lens with scanning in E -plane is analyzed. A full-wave mathematical model is developed to predict the scanning characteristics of the lens. The model is used to optimize the performance of a three-bit beam steering lens. It is demonstrated that the calculated conversion coefficients for the optimized lens are better than -2.1 dB in the frequency band from ... View full abstract»

• ### Reduction of Long Line Effects in Single-Layer Slotted Waveguide Arrays With an Embedded Partially Corporate Feed

Publication Year: 2010, Page(s):2275 - 2280
Cited by:  Papers (20)
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Single-layer slotted waveguide arrays have various advantages such as low cost and mass productivity for fabrication, high gain and efficiency especially in millimeter wave band. They have traveling wave operation and the bandwidth becomes inherently narrower due to the long line effect as the antenna gain increases. This paper proposes the partially corporate feed in the single-layer structure, w... View full abstract»

• ### Minimization of MEMS Breakdowns Effects on the Radiation of a MEMS Based Reconfigurable Reflectarray

Publication Year: 2010, Page(s):2281 - 2287
Cited by:  Papers (8)
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We present an investigation of MEMS breakdowns effects on the radiation pattern of a MEMS based reconfigurable reflectarray. In addition, a correction procedure is proposed to minimize phase errors due to breakdowns. It takes advantage of the numerous possibilities offered by the refectarray's cell to achieve a given phase shift. Furthermore, a systematic methodology is proposed to assess cell's r... View full abstract»

• ### Band Rejection Methods for Planar Log-Periodic Antennas

Publication Year: 2010, Page(s):2288 - 2294
Cited by:  Papers (5)
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Full-wave modeling and measurements are utilized to propose three band rejection techniques integrated with a multi- octave wideband planar log-periodic antenna. Antennas presented in this paper are designed to operate between 1.8 and 11 GHz with rejection at 6 GHz. Demonstrated band-rejection techniques include the removal of resonant teeth also referred to as aperture rejection, integration of a... View full abstract»

• ### A New Method for Locating the Poles of Green's Functions in a Lossless or Lossy Multilayered Medium

Publication Year: 2010, Page(s):2295 - 2300
Cited by:  Papers (6)
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A new method is presented to locate the poles of the Green's functions for a general multilayered medium, whether lossy or lossless. The problem associated with the pole extraction is reduced to solve the contour integrals in the complex plane that are represented in terms of the spectral-domain transmission coefficients. With the help of Cauchy's theorem, the proposed method can accurately and ra... View full abstract»

• ### Enhancement of Efficiency of Integral Equation Solutions of Antennas by Incorporation of Network Principles—Part I

Publication Year: 2010, Page(s):2301 - 2308
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A method is presented for enhancing the efficiency of integral equation solutions for antennas by reducing the number of coupled integral equations to be solved in a method of moments analysis. This method is applied to the accurate modeling of the feed of a simple cylindrical monopole antenna. A microwave network is developed to replace the effects of coupled fields due to one of the unknowns. Co... View full abstract»

• ### Coupled Integral Equations for Microwave Induced Elastic Wave in Elastic Media

Publication Year: 2010, Page(s):2309 - 2317
Cited by:  Papers (3)
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The interaction of waves with materials could include multiple physics (multiphysics), depending on the properties of waves and materials. For microwave illumination on elastic media, the electromagnetic (EM) and mechanic processes exist simultaneously and are coupled together. To exactly describe the involved process with interaction of microwave and induced elastic wave, the coupled Maxwell's eq... View full abstract»

• ### Balanced Antipodal Vivaldi Antenna With Dielectric Director for Near-Field Microwave Imaging

Publication Year: 2010, Page(s):2318 - 2326
Cited by:  Papers (132)  |  Patents (2)
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A balanced antipodal Vivaldi antenna is designed to be used as a sensor for a microwave breast cancer detection system. The antenna has the ability to send short electromagnetic pulses into the near-field, with low distortion, low loss and in a directional manner. The antenna directivity is further improved by the inclusion of a novel feature in the antenna aperture called a “directorȁ... View full abstract»

• ### 3D Nonlinear Super-Resolution Microwave Inversion Technique Using Time-Domain Data

Publication Year: 2010, Page(s):2327 - 2336
Cited by:  Papers (20)
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A nonlinear three-dimensional full-wave inverse scattering method using time-domain data and models is presented. It successfully reconstructs 3D images of various unknown objects using time-domain data. The method uses Born-type iterations and a constrained minimization to reconstruct successively improved images. The use of time-domain data allows very few transmitters and receivers to be used. ... View full abstract»

• ### Microwave Radar-Based Differential Breast Cancer Imaging: Imaging in Homogeneous Breast Phantoms and Low Contrast Scenarios

Publication Year: 2010, Page(s):2337 - 2344
Cited by:  Papers (89)  |  Patents (1)
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This paper presents an improved antenna array for radar-based breast cancer imaging. The improvement was achieved by increasing the number of antennas in the array to 31 elements, as well as by improving the antenna design itself. Using an experimental setup, with homogeneous curved breast phantoms, we have demonstrated substantial imaging improvement with the new antenna array. The new system is ... View full abstract»

• ### On the Fundamental Limitations of Artificial Magnetic Materials

Publication Year: 2010, Page(s):2345 - 2353
Cited by:  Papers (4)
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Fundamental limitations are presented on the performance of artificial magnetic materials based on the geometrical and physical characteristics of the inclusions comprising the medium. The permeability and magnetic susceptibility of the medium are formulated in terms of newly defined geometrical and physical parameters. Based on the Lorentzian form of the effective permeability function of the med... 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