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Electronics Letters

Issue 12 • June 4 2009

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Displaying Results 1 - 25 of 49
  • Electronics Letters - [editorial]

    Publication Year: 2009, Page(s): 575
    IEEE is not the copyright holder of this material | PDF file iconPDF (92 KB)
    Freely Available from IEEE
  • Silicon photonics: the optical spice rack

    Publication Year: 2009, Page(s):576 - 578
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (146 KB)

    Silicon is evolving as a versatile photonics platform with multiple functionalities that can be seamlessly integrated. The toolbox is rich, starting from the ability to guide and switch multiple wavelength sources at gigahertz bandwidths, to optomechanical MEMS and opto-fluidics devices. Some of the challenges in the field of silicon photonics are discussed; among them are the decrease of losses i... View full abstract»

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  • Photonic integration: Si or InP substrates?

    Publication Year: 2009, Page(s):578 - 581
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    A brief review of recent progress in photonic integrated circuits (PICs) is presented. By examining Moore's Law and the roadmap of conventional electronic ICs, valuable lessons in host material selection for PICs are discussed. Finding a primary host material for integration is necessary and vital to the success of the PIC industry. Initial success has been achieved in both InP-based and silicon-b... View full abstract»

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  • Towards foundry approach for silicon photonics: silicon photonics platform ePIXfab

    Publication Year: 2009, Page(s):581 - 582
    Cited by:  Papers (16)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (52 KB)

    Fabless access to wafer-scale silicon photonics technology is moving silicon photonics closer to becoming a mainstream technology and opens up new exciting areas for research at the same time. It is only by using wafer-scale technology that this emerging field will be able to realise its promise: to become a disruptive technology. At the basis of the rationale for silicon photonics is a complex of... View full abstract»

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  • Silicon photonics: a bright future?

    Publication Year: 2009, Page(s):582 - 584
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (145 KB)

    Silicon photonics has expanded considerably in the last decade and a number of companies have also released products onto the market place. Some of the recent results from the field are reviewed before the main areas requiring further research before they can be achieved are discussed. An overview is given of the major Si photonics research presently being pursued in the UK. Finally, a number of p... View full abstract»

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  • Future prospects of silicon photonics in next generation communication and computing systems

    Publication Year: 2009, Page(s):584 - 588
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (362 KB)

    The recent progress is reviewed and future prospects of silicon photonics in next generation communication and computing systems are probed. Leveraging the many-billion-dollar complementary metal-oxide-semiconductor (CMOS) industry, silicon photonics has promising prospects for realising very large-scale electronic and photonic integrated circuits with thousands of optical components and millions ... View full abstract»

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  • Silicon photonics in China

    Publication Year: 2009, Page(s):588 - 591
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (98 KB)

    Silicon photonics, particularly its compatibility with existing silicon microelectronic technology, has been increasingly studied in recent years. China sees the potential impact on the sustainability of its economic development and is increasing the investment in this new research area. But, the lack of research and manufacture accumulation in silicon microelectronic technology will weigh down th... View full abstract»

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  • Low-pass biquadratic filters with high suppression rate

    Publication Year: 2009, Page(s):591 - 593
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (167 KB)

    Low-pass biquadratic filters providing a high attenuation rate in the stopband are presented. This feature achieves better high frequency parameters, even with conventional (e.g. low consumption) active elements. Analysis and improvements of the Sallen-Key filter, as well as a biquadratic filter based on the second generation current conveyor CCII are also presented. The optimisation relies on the... View full abstract»

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  • CPW-fed ultra-wideband antenna with compact size

    Publication Year: 2009, Page(s):593 - 594
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (337 KB)

    A coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna with compact size is presented. The entire size of the antenna is as small as 30times13times1.6timesmm. The measured and simulated impedance bandwidth defined by voltage-standing wave ratios <2 is from 3.1 to more than 10.6 GHz. The proposed antenna exhibits a nearly omni-directional radiation pattern with very compact size, which is s... View full abstract»

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  • Dual-frequency folded dipole antenna with PBG structure

    Publication Year: 2009, Page(s):584 - 588
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (255 KB)

    For wideband RFID systems, a dual-frequency printed folded dipole antenna is designed with a photonic bandgap (PBG) structure carved in the antenna's arms. Simulated results show that this antenna has good return loss characteristic and hemisphere direction radiation characteristic, at two working centre frequencies of 0.90 and 2.24'GHz. Compared to other improved structures, the new PBG structure... View full abstract»

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  • Estimation of low frequency coverage inside car for passive access system entry

    Publication Year: 2009, Page(s):596 - 597
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (234 KB)

    The development and validation of the simulation approach for estimation of low frequency magnetic field coverage inside cars is addressed. Using electromagnetic simulation software based on the method of moments and specially developed simulation models the magnetic field has been computed inside a car. On-car measurement results confirm the simulated values of the magnetic field. View full abstract»

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  • Modelling line-of-sight coupled MIMO systems with generalised scattering matrices and spherical wave translations

    Publication Year: 2009, Page(s):598 - 599
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (149 KB)

    A model to rigorously characterise line-of-sight MIMO systems is introduced. It is based on the generalised scattering matrix of each antenna, considered as isolated, and the rotation and translation coefficients of spherical modes. The resulting channel matrix rigorously includes the exact spherical vector nature of electromagnetic propagation (which may exert a significant influence over short-r... View full abstract»

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  • Proper interpretation of source excitations for resolving ostensible excessive power gains of metamaterial resonances

    Publication Year: 2009, Page(s):599 - 601
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (250 KB)

    The aim of this communication is to resolve the anomalous phenomenon of extremely large radiated powers of antennas embedded within metamaterial layers apparently achievable under resonances. The essence of the discussion rests on the law of power conservation and causality conditions. A slotted spherical dipole coated with two layers of homogeneous materials is chosen to illustrate the concepts, ... View full abstract»

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  • Reduction of mutual coupling between closely-packed antenna elements using defected ground structure

    Publication Year: 2009, Page(s):601 - 602
    Cited by:  Papers (22)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (172 KB)

    A simple ground plane structure that can reduce mutual coupling between closely-packed antenna elements is proposed. The structure consists of a dumb-bell-like pattern etched in a single ground plane. It is found that isolation of more than -40-dB can be achieved between two parallel individual planar inverted F antennas sharing a common ground plane. Influence of the designed defected ground plan... View full abstract»

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  • Absorption in human body at 900 MHz for oblique incidence of plane wave

    Publication Year: 2009, Page(s):602 - 604
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB)

    ICNIRP(1998) and IEEE C95.1-2005 limits for human exposure to radio-frequency fields are derived based on the condition of maximal coupling of the field to the body. In this study, at 900 MHz, the whole body average specific absorption rate (SARWB) for an adult's and a child's body is computed under these conditions and is shown to be also relatively uniform when explored over a range o... View full abstract»

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  • SPECT image classification using random forests

    Publication Year: 2009, Page(s):604 - 605
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (202 KB)

    A novel computer aided diagnosis system for the early diagnosis of Alzheimer's disease (AD) is presented. The system consists of voxel-based normalised mean square error feature extraction, a t-test with feature correlation weighting for feature selection and random forest image classification. The proposed method yields an up to 96% classification accuracy, thus outperforming recent develo... View full abstract»

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  • System-level yield optimisation using hierarchical-based design flow

    Publication Year: 2009, Page(s):605 - 607
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (529 KB)

    A new approach in hierarchical optimisation is presented, capable of optimising both the performance and yield of a system-level analogue circuit design. A behavioural model that combines the performance and variation from a Pareto-front is developed which can be used to optimise the system-level structure. The results have been verified with transistor-level simulations of a PLL and suggest that ... View full abstract»

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  • Universal cellular automaton cell using quantum cellular automata

    Publication Year: 2009, Page(s):607 - 609
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (247 KB)

    In recent years cellular automata (CAs) have been used widely to model and simulate physical systems and also to solve scientific problems. CAs have also been successfully used as a VLSI architecture and have proved to be very efficient at least in terms of silicon-area utilisation and clock-speed maximisation. Quantum cellular automata (QCA) is one of the promising emerging technologies for nanos... View full abstract»

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  • Excess loop delay compensation for continuous-time ΔΣ modulators using interpolation

    Publication Year: 2009, Page(s):609 - 610
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB)

    A new excess loop delay compensation technique for continuous-time DeltaSigma-modulators by using signal interpolation is presented. This technique uses an auxiliary differentiator in the feedforward path to construct a signal interpolation at the input of the quantiser to enable an early decision that compensates for excess loop delay. A simple tuning for the interpolation coefficient makes this ... View full abstract»

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  • High-speed and low-power feRAM utilising merged BL/PL array architecture with twin-bitline-driven scheme

    Publication Year: 2009, Page(s):610 - 612
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (279 KB)

    A novel design method for nonvolatile ferroelectric random access memory (FeRAM) using a merged bitline (BL)/plateline (PL) array architecture with a twin bitline-driven scheme is proposed. This method is effective in improving the FeRAM performance and reduces the power consumption. A 128 Kbit FeRAM prototype applying the proposed circuitry is implemented. The chip size, access time and memory ar... View full abstract»

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  • Noise-shaped integrating quantisers in ΔΣ modulators

    Publication Year: 2009, Page(s):612 - 613
    Cited by:  Papers (12)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    A new integrating analogue-to-digital converter (ADC) is proposed. With a small modification to the discharging phase of the traditional single/dual slope converter, error correction may be achieved. If the corrected ADC is embedded in a delta-sigma (DeltaSigma) converter, first-order quantisation noise shaping is achieved. This enhances the noise shaping of the delta-sigma modulator. Simulation r... View full abstract»

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  • Real-time application to multiprocessor-system-on-chip mapping strategy for system-level design tool

    Publication Year: 2009
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (69 KB)

    A new static mapping technique is presented that can be integrated in a system-level design tool for modelling and simulating real-time applications onto an embedded multiprocessor system. The results of preliminary experiments indicate that the proposed two-phase mapping approach can achieve a good trade-off between the efficiency in resource usage and processor load balancing, as well as the min... View full abstract»

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  • LMS calibration of sampling timing for time-interleaved A/D converters

    Publication Year: 2009, Page(s):615 - 617
    Cited by:  Papers (3)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (211 KB)

    Novel sampling-timing calibration for time-interleaved A/D converters is proposed and verified by simulation. An FIR-filter structure exploiting the sampling theorem provides a simple but accurate time derivative of the converted signal and hence enables reliable estimation and compensation of sampling-time deviation of each unit ADC assisted by a reference converter and an LMS algorithm. View full abstract»

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  • Electronic tunability of ferroelectric liquid crystal infiltrated photonic crystal fibre

    Publication Year: 2009, Page(s):617 - 618
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB)

    The electronic tunability of ferroelectric liquid crystal filled photonic crystal fibres is demonstrated for the first time. The tunability is obtained in the wavelength range of 1500-1600-nm, with a free spectral range of-20-nm. The electronic tunability is achieved by applying an electric field onto the infiltrated photonic crystal fibre which facilitates the photonic bandgap tuning owing to the... View full abstract»

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  • Model-based quarter-pixel motion estimation with low computational complexity

    Publication Year: 2009, Page(s):618 - 620
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (109 KB)

    Proposed is an interpolation-free quarter-pixel motion estimation method based on a mathematical model for video encoding. In this method, only three shift operators and four compare operators are required in each horizontal and vertical direction to find a quarter-pixel resolution motion vector. Experimental results show that the proposed method reaches almost the same performance as an interpola... 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