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Electronics Letters

Issue 17 • Date August 19 2010

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Displaying Results 1 - 25 of 48
  • In brief

    Publication Year: 2010, Page(s): 1170
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (231 KB)

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  • Interview

    Publication Year: 2010, Page(s): 1170
    IEEE is not the copyright holder of this material | PDF file iconPDF (217 KB)
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  • Making the switch to SOAs

    Publication Year: 2010, Page(s): 1171
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (761 KB)

    The paper gives an overview on the integrated multistage optical switch network has been fabricated and operated at a record speed of 160 Gbit/s. Researchers from COBRA Research Institute at Eindhoven University of Technology in the Netherlands integrated several semiconductor optical amplifier (SOA) gates with low-loss passive components and wiring. This is a significant step towards an efficient... View full abstract»

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  • Coming up for air

    Publication Year: 2010, Page(s): 1172
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (916 KB)

    A new widely-tunable continuous-wave singlemode laser source around 3.24 m for the characterisation of volatile organic compounds has been demonstrated by researchers at the National Research Council of Canada (NRC). This is the first report of a singlemode type-I diode laser at this wavelength, paving the way for highly-sensitive industrial gas applications. View full abstract»

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  • Surface acoustic wave transducers fabricated by femtosecond laser ablation

    Publication Year: 2010, Page(s):1175 - 1176
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB)

    The fabrication of surface acoustic wave (SAW) devices by femtosecond laser micromachining has been demonstrated. The interdigital SAW transducers of 50 m wavelength were formed on YZ lithium niobate substrate by femtosecond pulse ablation of an aluminium layer. The two-port SAW device has insertion loss of 11 dB at 68 MHz. The S-parameter measurements revealed no degradation in substrate elastic,... View full abstract»

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  • Bandwidth improvement method using extended ground

    Publication Year: 2010, Page(s):1176 - 1177
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (374 KB)

    Proposed is an antenna design for achieving wide bandwidth using an extended ground. The poor radiation performance of a planar inverted-F antenna with branch structures was significantly improved using the proposed feeding method, in which the ground is extended under a feed line. The antenna design achieved 27% relative impedance bandwidth at 1.9% GHz. View full abstract»

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  • Compact printed CPW-fed monopole ultra-wideband antenna with triple subband notched characteristics

    Publication Year: 2010, Page(s):1177 - 1179
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (419 KB)

    A coplanar waveguide fed monopole ultra-wideband antenna with triple subband notched characteristics and small volume (23 × 29 × 0.8 × mm3) is presented. The proposed antenna yields impedance bandwidth of 3.1-10.6-GHz with return loss S11-10-dB, except for the three subbands of 3.3-3.7-GHz for WiMAX, 5.15-5.825-GHz for WLAN and 7.25-7.75-GHz for the downlink of X-ba... View full abstract»

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  • Compact printed double-folded inverted-L antenna for long-range RFID handheld reader

    Publication Year: 2010, Page(s):1179 - 1181
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    A novel compact printed double-folded inverted-L antenna is presented. The radiator is modified from a printed inverted-L antenna by extending and folding its radiated arm. A unidirectional radiation pattern is obtained as the radiator is mounted on a vertical printed rectangular ground. A slit etched on the ground of proper length and position is used to improve antenna directivity and suppress b... View full abstract»

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  • Flexible antenna based on composite right/left-handed transmission line

    Publication Year: 2010, Page(s):1181 - 1182
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (315 KB)

    A flexible antenna based on the composite right/left-handed transmission line is proposed. The flexible antenna is fabricated on liquid crystal polymer substrate with a thickness of 80 m. The antenna operates at 2.3 GHz and its size is 38 43 mm. The return losses of the proposed antenna are almost unchanged while it is bent from 90 to 90 . View full abstract»

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  • Planar inverted-E antenna for UHF RFID tag on metallic objects with bandwidth enhancement

    Publication Year: 2010, Page(s):1182 - 1183
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (273 KB)

    A novel design of a planar compact inverted-E tag antenna mounted on metallic objects for UHF RFID systems is proposed. By insetting the slit into the upper horizontal strip of the proposed compact tag antenna, a new resonant mode close to the fundamental mode of the inverted-E antenna is excited to enhance the operating bandwidth. The obtained impedance bandwidth across the operating band can rea... View full abstract»

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  • Ultra-wideband endfire directional tapered slot antenna using CPW to wide-slot transition

    Publication Year: 2010, Page(s):1183 - 1185
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (306 KB)

    A very simple and successful design for an endfire directional tapered slot antenna with ultra-wideband characteristic using CPW to wide-slot transition is presented. By widening the slot width in the transition, ultra-wideband characteristic and directivity enhancement to the endfire direction of the antenna are obtained. To verify this characteristic, the electric field distributions in the tran... View full abstract»

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  • Computational methods to detect step events for normal and pathological gait evaluation using accelerometer

    Publication Year: 2010, Page(s):1185 - 1187
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (141 KB)

    The presented study highlights the feasibility and accuracy of novel computational methods based on a morphological filter and a least square acceleration filter to detect step events for evaluating normal and pathological gait parameters using a single accelerometer. This is the first evidence that demonstrates the feasibility and accuracy of the novel accelerometer-based system and methods in bo... View full abstract»

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  • 70-280 MHz 21 mW 53 dB SFDR Gm-C filter

    Publication Year: 2010, Page(s):1187 - 1188
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (285 KB)

    A 70-280-MHz fifth-order Chebyshev Gm-C lowpass filter in 0.13--m CMOS is presented. A topological modification is proposed that can improve IIP3 for 10-dB compared to conventional Gm-C filters. Measured spurious free dynamic range (SFDR) is greater than 50-dB. The filter passband response is accurately maintained over four times frequency range by using unit Gm cell arrays and an independent Q tu... View full abstract»

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  • Comparator-based buffer with resistive error correction

    Publication Year: 2010, Page(s):1188 - 1190
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    A comparator-based buffer is proposed to enhance the driving capability of high-gain amplifiers with switched-capacitor loads. A simple correction scheme using a resistor in the charging path and a correction phase reduces the overshoot of the output voltage. SPECTRE simulations verify the effectiveness of the proposed scheme. View full abstract»

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  • CMOS triode transconductor based on quasi-floating-gate transistors

    Publication Year: 2010, Page(s):1190 - 1191
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (326 KB)

    A novel CMOS transconductor based on transistors operating in the triode region and quasi-floating gate (QFG) techniques is proposed. The V-I conversion is performed by two triode transistors acting as a current divider and QFG transistors are employed to enforce a constant drain-source voltage, improving the linearity notably. The circuit has been fabricated and measured using a 0.5 m CMOS techno... View full abstract»

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  • Iterative impedance analysis method on high integrated impedance network

    Publication Year: 2010, Page(s):1191 - 1193
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (235 KB)

    An iterative type impedance analysis method for an impedance network is presented. The whole impedance network is divided into several sub-networks and each sub-network is analysed in a form of the linear voltage-current relation. The analysed voltage-current relation is iteratively applied to obtain the whole impedance. An illustrated example is given to show that the proposed method is simple an... View full abstract»

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  • Voltage doubler with improved driving capability and no short-circuit losses

    Publication Year: 2010, Page(s):1193 - 1194
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    A simple circuit design improves the driving capability of conventional voltage doublers and, at the same time, eliminates short-circuit losses. Simulation results confirm higher conversion efficiency and extended operation. View full abstract»

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  • GPU-based LU decomposition for large method of moments problems

    Publication Year: 2010, Page(s):1194 - 1196
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (154 KB)

    In the method of moments (MOM) analysis of electromagnetic phenomena, the LU decomposition is often an important and costly step in the solution process. In this reported work, the acceleration of LU decomposition using graphics processing units (GPUs) has been considered. Although existing GPU methods, such as those supplied by MAGMA, provide significant speedup over CPU-only implementations, the... View full abstract»

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  • GPU and CPU cooperation parallel visualisation for large seismic data

    Publication Year: 2010, Page(s):1196 - 1197
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (342 KB)

    A parallel visualisation technique for large seismic data based on a graphics processing unit (GPU) and CPU cooperation is presented. The 3D texture mapping capability commonly available in modern GPUs is employed as a core rendering engine and advantage is taken of combinations of GPU-based parallel volume visualisation and visibility tests to accelerate the whole rendering process. Experimental ... View full abstract»

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  • Removal of salt-and-pepper noise based on compressed sensing

    Publication Year: 2010, Page(s):1198 - 1199
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB)

    An image restoration method for removing salt-and-pepper noise is proposed. The key point of the method is the sparsity used to reconstruct the whole image based on partial noise-free pixels. Experimental results demonstrate the better performance of the proposed method compared to the existing modified median-type filters. View full abstract»

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  • Construction of jacket matrix from characters on finite Abelian group

    Publication Year: 2010, Page(s):1199 - 1200
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (71 KB)

    A construction of a jacket matrix motivated by the element inverse property of the centre weighted Hadamard matrix is presented with suitably chosen characters on a finite Abelian group. The present matrix, which is an extension of the conventional jacket matrices on the Galois field, is a contribution to a problem of searching for an extended family of jacket matrices on finite Abelian group. View full abstract»

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  • Improving robustness of vector fitting to outliers in data

    Publication Year: 2010, Page(s):1200 - 1201
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (361 KB)

    A new algorithm is introduced for broadband macromodelling of passive electronic components from frequency response data. It modifies the vector fitting algorithm in such a way that the L1 norm of the approximation error is minimised, rather than the L2 norm. It is shown that this approach is more robust towards outliers in the data. View full abstract»

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  • On convergence of aggregated traffic to totally positively skewed α-stable distribution

    Publication Year: 2010, Page(s):1202 - 1203
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (100 KB)

    Recent researches have highlighted the impulsive nature of the aggregated network traffic, and consequently α-stable distribution models have been widely used to capture the observed impulsiveness. Presented is an analytical demonstration of aggregated network traffic converging to totally positively skewed α-stable distribution, which provides inherent mechanism explanation for the ... View full abstract»

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  • 5-75 GHz common-gate subharmonic mixer in 65 nm CMOS

    Publication Year: 2010, Page(s):1203 - 1205
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (311 KB)

    Direct conversion architectures have the advantage of no image frequencies, fewer components and lower cost. However, local oscillator (LO) leakage reduces receiver sensitivity, causes LO pulling, and is a challenging problem for direct conversion transceiver design. Proposed is a mixer using the second-order harmonic of the LO. The proposed subharmonic mixer is based on a switching common-gate st... View full abstract»

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  • Dual-band BPF with DSIR and TSIR

    Publication Year: 2010, Page(s):1205 - 1206
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (350 KB)

    A novel dual-band microwave bandpass filter (BPF) is proposed using a dual-mode stepped impedance resonator (DSIR) and a three-mode stepped impedance resonator (TSIR). Either of the SIRs can not only separately generate one passband but also control the passband performance. Owing to the intrinsic characteristics of the SIRs, each passband has a pair of transmission zeros to improve the selectivit... View full abstract»

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Aims & Scope

Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

Full Aims & Scope

Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White
Head of Photonics Research
University of Cambridge, UK