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# IEEE Antennas and Wireless Propagation Letters

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Displaying Results 1 - 25 of 374

Publication Year: 2009, Page(s):C1 - 1494
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• ### IEEE Antennas and Wireless Propagation Letters publication information

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

Publication Year: 2009, Page(s):1 - 2
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• ### A Switch-Band Antenna for Software-Defined Radio Applications

Publication Year: 2009, Page(s):3 - 5
Cited by:  Papers (11)  |  Patents (1)
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A novel method is introduced which enables the use of a tunable narrowband antenna within a wide frequency range. The resulting antenna is able to operate in multifrequency bands simultaneously. In addition, the number of frequency bands and their center frequencies can be changed dynamically. A time domain simulation is provided using a simple circuit model for two simultaneous frequency bands. A... View full abstract»

• ### Compact Dual-Band Hybrid Dielectric Resonator Antenna With Radiating Slot

Publication Year: 2009, Page(s):6 - 9
Cited by:  Papers (11)
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A miniature independent dual-band hybrid dielectric resonator antenna (DRA) fed by a coplanar waveguide (CPW) inductive slot is proposed. In this configuration, the CPW inductive slot performs the functions of an effective radiator and the feeding structure of the DR. By optimizing the structure parameters, the hybrid structure resonates at two different frequencies independently. One is from the ... View full abstract»

• ### Effects of Artificial Magnetic Conductors in the Design of Low-Profile High-Gain Planar Antennas With High-Permittivity Dielectric Superstrate

Publication Year: 2009, Page(s):10 - 13
Cited by:  Papers (19)
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Cavity resonance antennas with dielectric superstrate are considered with different ground plane types namely, perfect electric conductor (PEC), perfect magnetic conductor (PMC), and artificial magnetic conductor (AMC). Radiation properties of these antennas are computed using transverse equivalent network (TEN) model. It is shown that the effects of angular and polarization dependency of artifici... View full abstract»

• ### A Lumped-Circuit Model for a Triband Trapped Dipole Array-Part 1: Model Description

Publication Year: 2009, Page(s):14 - 18
Cited by:  Papers (2)
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Demands on emergency radio frequency (RF) links have shown how important high-frequency (HF) (330 MHz) communications can be for medium to long range. The YagiUda and the log period antenna are among some of the more popular HF antennas. The KLM's Communications Equipment, Inc., four-element KT-34A antenna is based on both types of antennas and operates in the 10-, 15-, and 20-m bands. It relies o... View full abstract»

• ### Slot Antennas With an Extended Ground for Multiple-Antenna Systems in Compact Wireless Devices

Publication Year: 2009, Page(s):19 - 22
Cited by:  Papers (3)  |  Patents (2)
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In this letter, new slot antennas with an extended ground are proposed. They are easily built as internal antennas in a compact wireless device. Originated from lambda/4 slot antennas, an additional vertical L-shaped metallic sheet as an extended ground and a main radiator is added to reduce the antenna size. The sheet is designed close to a ground plane, and its height can be chosen according to ... View full abstract»

• ### Transparent Boundary Condition for the Parabolic Equation Modeled by the 4RW

Publication Year: 2009, Page(s):23 - 26
Cited by:  Papers (4)
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Transparent boundary condition in a 2D-space is presented for the four-state random walk (4RW) model that is used in treating the standard parabolic equation by stochastic methods. The boundary condition is exact for the discrete 4RW model, is of explicit type, and relates the field in the spectral domain at the boundary point in terms of the field at a previous interior point via a spectral trans... View full abstract»

• ### Quasi-Isotropic X-Band Inverted-F Antenna for Active RFID Tags

Publication Year: 2009, Page(s):27 - 29
Cited by:  Papers (8)
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An X-band (10.5 GHz) inverted-F antenna (IFA) for an active radio frequency identification (RFID) tag is presented. The antenna consists of two parts. One part comprises a driven monopole and a ground plane. The second part is a metal casing mounted on the ground plane to provide enclosed space for housing the electronics of the tag. The antenna was studied by means of both numerical simulations a... View full abstract»

• ### A Fraunhofer-Based Approach for the Assessment of the Field Radiated in the Fresnel Region of an Antenna

Publication Year: 2009, Page(s):30 - 33
Cited by:  Papers (4)
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The letter focuses on a simplified and conservative method for the assessment of the electromagnetic exposure in proximity of a radiator. The method allows the use of the Fraunhofer antenna pattern to estimate the electromagnetic field radiated in the Fresnel region of base transceiver station (BTS) antennas. The proposed approach is introduced from a theoretical point of view and validated with s... View full abstract»

• ### A Novel Planar Conformal Antenna Designed With Splines

Publication Year: 2009, Page(s):34 - 36
Cited by:  Papers (6)
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A broadband planar dipole, radiating from 280 to 1000 MHz (with Gain > 0 dBi), is considered for shape optimization using splines. It is demonstrated via simulations and measurements that the 0 dBi gain point is shifted to 190 MHz (32% size reduction). The entire optimization amounts to antenna reshaping. View full abstract»

• ### Fast Analysis of Terahertz Integrated Lens Antennas Employing the Spectral Domain Ray Tracing Method

Publication Year: 2009, Page(s):37 - 39
Cited by:  Papers (9)
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We present a computationally efficient spectral ray tracing (SRT) method that requires one spectral domain integration step for each observation point. We compare the SRT method with the finite element method (FEM) and geometrical optics (GO) via simulation of terahertz Gaussian beam propagation through a hemispherical lens. The SRT was able to accurately solve the problem 30 times faster than FEM... View full abstract»

• ### Electromagnetic Scattering From Multiple Slant Strips

Publication Year: 2009, Page(s):40 - 43
Cited by:  Papers (1)
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Electromagnetic TE and TM wave scattering from multiple slant strips is studied. Green's second theorem is used to relate fields within slant regions. The mode-matching technique is applied to obtain simultaneous equations for discrete modal coefficients. Numerical results for various slant geometries are illustrated. View full abstract»

• ### Low-Profile Integrated Microstrip Antenna for GPS-DSRC Application

Publication Year: 2009, Page(s):44 - 48
Cited by:  Papers (24)
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This letter describes the concept, design, and measurement of a low-profile integrated microstrip antenna for dual-band applications. The antenna operates at both the GPS L1 frequency of 1.575 GHz with circular polarization and 5.88 GHz with a vertical linear polarization for dedicated short-range communication (DSRC) application. The antenna is low profile and meets stringent requirements on patt... View full abstract»

• ### A Miniature Spiral Diversity Antenna System With High Overall Gain Coverage and Low SAR

Publication Year: 2009, Page(s):49 - 52
Cited by:  Papers (11)
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A miniature spiral diversity antenna system operating at 1.85 GHz is proposed. Two 10 times 6.25 mm antennas were placed at two corners of a printed circuit board at a height of 7 mm from the ground plane. Each antenna achieves nearly 7% bandwidth within 6 dB return loss. The mutual coupling between the two antennas is less than 10 dB. The proposed diversity antenna scheme exhibits high overall ga... View full abstract»

• ### Stability of Narrowband Dynamic Body Area Channel

Publication Year: 2009, Page(s):53 - 56
Cited by:  Papers (21)
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The stability of a dynamic narrowband on-body area channel is characterized based on real-time measurements of the time domain channel impulse response (CIR) at frequencies near the 900- and 2400-MHz industrial, scientific, and medical (ISM) bands. A new parameter, channel variation factor, characterizes channel coherence time. Body movement is considered at various transmit-receive pair locations... View full abstract»

• ### Multiband Dual Spiral Stripline-Loaded Monopole Antenna

Publication Year: 2009, Page(s):57 - 59
Cited by:  Papers (15)
| | PDF (594 KB) | HTML

We propose a multiband antenna that exhibits a dual coupling characteristic and dual frequency operation using a dual spiral stripline-loaded monopole in conjunction with L-shaped slots in a ground plane. The slots allow the upper part of the ground plane to function as an additional monopole that resonates in concordance with the existing resonances of the upper and lower spiral stripline monopol... View full abstract»

• ### A Broadband Dual-Polarized Magneto-Electric Dipole Antenna With Simple Feeds

Publication Year: 2009, Page(s):60 - 63
Cited by:  Papers (71)  |  Patents (1)
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A novel dual-polarized magneto-electric dipole antenna excited by two -shaped strips is presented. The antenna achieves a common impedance bandwidth of 65.9% (SWR < 2) at both input ports. The antenna has excellent performance in isolation, which is more than 36 dB between the two input ports, and the gain of the antenna is about 9.5 dBi. The radiation pattern and bandwidth over the operating f... View full abstract»

• ### Design and Realization of a Linearly Polarized Eleven Feed for 1-10 GHz

Publication Year: 2009, Page(s):64 - 68
Cited by:  Papers (33)
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A new linearly polarized eleven feed for operation between 1 and 10 GHz is presented. This frequency band is higher than the realized before, and the input reflection coefficient is better than ${-}8$ dB over the frequency range, which also is an improvement over previous models. The log-periodic dipole petals have been designed by using a simple one-by-one parameter optimization scheme with a sim... View full abstract»

• ### Two-Step Lagrange Interpolation Method for the Multilevel Fast Multipole Algorithm

Publication Year: 2009, Page(s):69 - 71
Cited by:  Papers (6)
| | PDF (102 KB) | HTML

We present a two-step lagrange interpolation method for the efficient solution of large-scale electromagnetics problems with the multilevel fast multipole algorithm (MLFMA). Local interpolations are required during aggregation and disaggregation stages of MLFMA in order to match the different sampling rates for the radiated and incoming fields in consecutive levels. The conventional one-step metho... View full abstract»

• ### Antenna Radiation Efficiency Measurement in an Ultrawide Frequency Range

Publication Year: 2009, Page(s):72 - 75
Cited by:  Papers (14)
| | PDF (570 KB) | HTML

Conventional antenna radiation efficiency measurement techniques, such as the Wheeler cap, are generally narrowband and, thus, well suited for resonant antennas. In this work, the Johnston-Geissler (J-G) method based on the Wheeler cap principle is used in a wide frequency range. First, a good agreement between measurement and simulation in an ultrawide frequency band is shown on a straight wire m... View full abstract»

• ### Optically Modulated Scatterer Technique for Radiation Pattern Measurement of Small Antennas and RFID Tags

Publication Year: 2009, Page(s):76 - 79
Cited by:  Papers (2)  |  Patents (1)
| | PDF (290 KB) | HTML

The optically modulated scatterer (OMS) technique is developed for the electromagnetic field distribution measurement with minimum disturbance to the field under test. In this letter, we present a novel method to measure the radiation pattern of unwired small dipole-like antennas such as radio frequency identification (RFID) tag antennas by OMS technique. The radiation pattern could be measured by... View full abstract»

• ### Left-Handed/Right-Handed Transmission Line Subwavelength Cavity Resonators

Publication Year: 2009, Page(s):80 - 83
Cited by:  Papers (6)
| | PDF (557 KB) | HTML

In this letter, a new kind of cavity resonator based on left-handed/right-handed transmission lines is presented. The left-handed transmission line (LHTL), which can realize a negative phase shift, is formed by resonant-slot coupled cavity chain unit cells, while the right-handed transmission line (RHTL), which can realize positive phase shift, is made of coaxial waveguides. Resonance condition ca... View full abstract»

• ### Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates

Publication Year: 2009, Page(s):84 - 87
Cited by:  Papers (140)  |  Patents (4)
| | PDF (366 KB) | HTML

This letter presents a new metamaterial-based waveguide technology referred to as ridge gap waveguides. The main advantages of the ridge gap waveguides compared to hollow waveguides are that they are planar and much cheaper to manufacture, in particular at high frequencies such as for millimeter and sub- millimeter waves. The latter is due to the fact that there are no mechanical joints across whi... 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