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IEEE Antennas and Wireless Propagation Letters

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Publication Year: 2007, Page(s):C1 - 694
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• IEEE Antennas and Wireless Propagation Letters publication information

Publication Year: 2007, Page(s): C2
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• A Methodology to Determine the Isolation Requirements Between Collocated Cellular and GPS Antennas in Telematics

Publication Year: 2007, Page(s):1 - 4
Cited by:  Papers (5)
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This letter provides a methodology that includes theoretical analysis and measurements to determine the required isolation between a cellular transmitter, which consists of a class I AMPS and a class III CDMA 800, and a GPS receiver with collocated antennas. The method proposed in this letter can be used to determine isolation requirements between other cellular-based transmitters and a GPS... View full abstract»

• Wideband Fractal Vertical Patch Antenna

Publication Year: 2007, Page(s):5 - 6
Cited by:  Papers (4)
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A wideband vertical patch antenna (VPA) is depicted, which is devised from fractal antenna technology. By using a dual-Koch loop structure, a wideband VPA with 42% bandwidth and 8 dBi gain at the center frequency is designed and tested. Symmetrical broadside patterns are obtained at the passband. View full abstract»

• Small Spherical Antennas Using Arrays of Electromagnetically Coupled Planar Elements

Publication Year: 2007, Page(s):7 - 10
Cited by:  Papers (28)  |  Patents (1)
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This letter presents the design, fabrication, and experimental characterization of small spherical antennas fabricated using arrays of non-interconnected planar conductor elements. The antennas are based upon spherical resonator structures with radiation Q-factors approaching $1.5times$ the fundamental lower limit. The antennas are formed by coupling these resonators to an impedance-matched... View full abstract»

• The Design of Miniaturized Printed Wire Antennas Using Double-Layer Periodic Metallization

Publication Year: 2007, Page(s):11 - 14
Cited by:  Papers (6)
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The design of miniaturized printed wire antennas using multilayer vias loaded periodic metallization is presented. The proposed structure is evolved from a periodic slow-wave transmission line, where each unit cell is made of a patch and two loops spread over two metal layers connected in series through vias. A section of the periodic metallization is used as a quarter-wave monopole antenna... View full abstract»

• A Wideband Conical Beam Cylindrical Dielectric Resonator Antenna

Publication Year: 2007, Page(s):15 - 17
Cited by:  Papers (8)
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The letter proposes a novel cylindrical dielectric resonator antenna (DRA) geometry with low radiation Q-value facilitating wide band operation with conical radiation patterns. The DRA is fed by a microstrip transmission line with a vertical strip that is attached to the DRA surface. At optimum dimensions and position of the vertical strip on the horizontal microstrip, the DRA exhibits an i... View full abstract»

• Simple Broadband Planar CPW-Fed Quasi-Yagi Antenna

Publication Year: 2007, Page(s):18 - 20
Cited by:  Papers (70)
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In this letter, we present a novel coplanar waveguide fed quasi-Yagi antenna with broad bandwidth. The uniqueness of this design is due to its simple feed selection and despite this, its achievable bandwidth. The 10 dB return loss bandwidth of the antenna is 44% covering X-band. The antenna is realized on a high dielectric constant substrate and is compatible with microstrip circuitry and a... View full abstract»

• Wideband Circularly Polarized Stacked Microstrip Antennas

Publication Year: 2007, Page(s):21 - 24
Cited by:  Papers (49)
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A simple technique is developed to improve the axial ratio (AR)-bandwidth and quality of circularly polarized stacked microstrip antennas (CPSMAs) using a new C-type single feed. The proposed antenna has been optimized and fabricated, and the computed results agree very well with measurements. The antenna has a 3 dB AR bandwidth of 13.5%, gain is more than 7.5 dBi over the 3 dB AR bandwidth... View full abstract»

• A Compact Broadband Planar Antenna for GPS, DCS-1800, IMT-2000, and WLAN Applications

Publication Year: 2007, Page(s):25 - 27
Cited by:  Papers (48)
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A compact broadband planar antenna is developed for global positioning system (GPS), DCS-1800, IMT-2000, and WLAN handsets. The planar antenna consists of an S-strip and a T-strip which are separately printed on the two sides of a thin substrate (no via process is involved in the fabrication). The antenna size is only 18 mm$,times,$7.2 mm $,times,$0.254 mm which is more compact than previou... View full abstract»

• A Negative-Refractive-Index Metamaterial for Incident Plane Waves of Arbitrary Polarization

Publication Year: 2007, Page(s):28 - 32
Cited by:  Papers (14)
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In this letter, a left-handed artificial dielectric is proposed. Using resonating broadside coupled patches to generate a negative permeability and thin strips to generate negative permittivity, a negative index of refraction that is matched to free space can be designed. The structure is fabricated from a single dielectric sheet printed on both sides by metal patterns that couple to externally in... View full abstract»

• Harrington's Formula Extended to Determine Accurate Feed Reactance of Probe-Fed Microstrip Patches

Publication Year: 2007, Page(s):33 - 35
Cited by:  Papers (5)
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A simple formulation is presented as an extension of Harrington's formula to accurately estimate the feed reactance of probe-fed microstrip patches. This, unlike previous formulas, can efficiently address all sorts of variations of microstrip and probe parameters resulting in a more versatile form. Computed results are verified with some representative measured data on rectangular and circular mic... View full abstract»

• Characterization of Line-of-Sight MIMO Channel for Fixed Wireless Communications

Publication Year: 2007, Page(s):36 - 39
Cited by:  Papers (26)
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In this letter, we proposed an approach to construct multiple-input-multiple-output (MIMO) channel in line-of-sight (LOS) environment. It could be a potential technique for high-speed data transmission in fixed broadband wireless access (BWA). Based on Ricean fading channel model, our research is focused on the characteristics of the channel matrix such as the condition number. The initial discuss... View full abstract»

• A Y-Shaped Stub Proximity Coupled V-Slot Microstrip Patch Antenna

Publication Year: 2007, Page(s):40 - 42
Cited by:  Papers (10)
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A Y-shaped proximity coupled V-slot microstrip patch antenna (MPA) is presented in this letter. Separating the patch from the Y-shaped stub by a foam layer with height of 0.05lambda0 (lambda0 is the free-space wavelength at the center frequency), the proposed MPA shows an impedance bandwidth (BW) of 21%, simple structure and a high gain of about 9 dBi, which is not sensitive... View full abstract»

• Impact of Power Normalization in Experimental MIMO Antenna Performance Studies

Publication Year: 2007, Page(s):43 - 46
Cited by:  Papers (6)
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In this letter, an antenna independent normalization method is proposed for the multiple-input-multiple-output (MIMO) antenna evaluation. A conflict in the results when using proposed and widely used normalization method is verified View full abstract»

• Axial Ratio Bandwidth Enhancement for Quarter-Wave Polarizer Using a Genetic Algorithm

Publication Year: 2007, Page(s):47 - 50
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This investigation presents axial ratio bandwidth enhancement for a quarter-wave polarizer composed of mutilayered uniaxial anisotropic media and chiral media using a genetic algorithm. In our design, the constitutive parameters of materials can be arbitrary. This broadband polarizer can be realized through the adjustment of the thickness of materials. The nearly optimal and suitable thickness of ... View full abstract»

• Characterization and Modeling of the Indoor Radio Channel at 868 MHz for a Mobile Bodyworn Wireless Personal Area Network

Publication Year: 2007, Page(s):51 - 55
Cited by:  Papers (58)
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This letter reports the statistical characterization and modeling of the indoor radio channel for a mobile wireless personal area network operating at 868 MHz. Line of sight (LOS) and non-LOS conditions were considered for three environments: anechoic chamber, open office area, and hallway. Overall, the Nakagami-m cdf beast described fading for bodyworn operation in 60% of all measured channels in... View full abstract»

• Frequency Agility of Broadband Antennas Integrated With a Reconfigurable RF Impedance Tuner

Publication Year: 2007, Page(s):56 - 59
Cited by:  Papers (21)
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This letter demonstrate the frequency agility that can be achieved when an broadband antenna is integrated with a reconfigurable RF tuner as na impedance matching circuit. The reconfigurable tuner uses a microstrip loaded line structure with four stubs that are each terminated by a varactor diode. The spectral response can be varied by changing the capacitance of the diodes. Input impedance data o... View full abstract»

• Characteristics of Double Exponentially Tapered Slot Antenna (DETSA) Conformed in the Longitudinal Direction Around a Cylinder

Publication Year: 2007, Page(s):60 - 63
Cited by:  Papers (12)
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The characteristics of a double exponentially tapered slot antenna (DETSA) as a function of the radius that the DETSA is conformed to in the longitudinal direction is presented. It is shown through measurements and simulations that the radiation pattern of the conformed antenna rotates in the direction through which the antenna is curved, and that diffraction affects the radiation pattern if the r... View full abstract»

• A Two-Element Time-Modulated Array With Direction-Finding Properties

Publication Year: 2007, Page(s):64 - 65
Cited by:  Papers (77)  |  Patents (6)
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A two-element time-modulated array system which can be configured to provide active electronic null scanning is presented. The received signal from each element of the array is time switched and combined to provide a phase-modulated output in which the depth of modulation is dependent on the angle of arrival of the received signal. The angular response of the array at the first harmonic of the swi... View full abstract»

• Hexaband Planar Inverted-F Antenna With Novel Feed Structure for Wireless Terminals

Publication Year: 2007, Page(s):66 - 69
Cited by:  Papers (10)
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This letter proposes a new wideband built-in antenna with novel feed structure for wireless terminals. With the proposed design scheme, a hexaband antenna for covering global system for mobile communication (GSM850)/GSM900/digital cellular system (DCS1800)/personal communication service (PCS1900)/wideband code division multiple access (WCDMA)/world interoperability for microwave access (WIMAX2350)... View full abstract»

• Backscattering Cross Section of Ultrawideband Antennas

Publication Year: 2007, Page(s):70 - 73
Cited by:  Papers (54)
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Backscattering of ultrawideband (UWB) antennas is theoretically and experimentally studied in this letter. The finite-difference time-domain (FDTD) method using Berenger's perfectly matched layer absorbing boundary condition (PML-ABC) is employed for simulation and the measurement is carried out in indoor environment. Monostatic radar cross section (RCS) of square-slot antenna and printed circular... View full abstract»

• DOA Estimation With Circular Array via Spatial Averaging Algorithm

Publication Year: 2007, Page(s):74 - 76
Cited by:  Papers (13)
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This letter presents a method to estimate the directions of arrival (DOAs) by taking spatial averaging algorithm for circular array. By utilizing the symmetric configuration of the circular array to form a centrosymmetric array, the covariance matrix of the received data can be constructed in the form of the Hermitian persymmetric matrix, and then the spatial averaging algorithm can be appl... View full abstract»

• Design of Multiband UWB Planarized Monopole Using DMS Technique

Publication Year: 2007, Page(s):77 - 79
Cited by:  Papers (14)
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A variation of the novel technique called defected microstrip structure (DMS) is employed to enlarge the bandwidth of a planarized ultrawideband (UWB) monopole. It is demonstrated that introducing a defect in the feeding microstrip line, the lower bandwidth limit is lowered without affecting the antenna gain and radiation pattern. The bevel technique in the ground plane near to the feeding point i... View full abstract»

• A Compact Dual- and Wideband Cavity-Backed Slot Subarray

Publication Year: 2007, Page(s):80 - 82
Cited by:  Papers (4)
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A compact design for dual- and wideband slot sub-array is presented in this letter. The cavity-backed subarray is fed by two microstrip lines on the top layer of one substrate for 900 and 1800 MHz bands, respectively. With the use of ridged slots backed by a conductor plate with three rectangular cavities, a compact design is realized for a dual- and wideband subarray with very good isolation and ... 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.

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Meet Our Editors

Editor-in-Chief
Christophe Fumeaux
School of Electrical and Electronic Engineering