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Electronics Letters

Issue 19 • September 15 2011

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Displaying Results 1 - 25 of 34
  • In brief

    Publication Year: 2011, Page(s): 1054
    IEEE is not the copyright holder of this material | PDF file iconPDF (86 KB)
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  • Interview

    Publication Year: 2011, Page(s): 1054
    IEEE is not the copyright holder of this material | PDF file iconPDF (79 KB)
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  • Non-spurious reception

    Publication Year: 2011, Page(s): 1055
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (299 KB)

    Researchers in the US have demonstrated a monolithically integrated attenuated counter-propagating optical phase-locked loop photonic integrated circuit (ACP-OPLL PIC) as a highly linear coherent receiver. Their results show that such devices can realise a high dynamic range in future phase-modulated RF/photonic links. View full abstract»

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  • A fine set of teeth

    Publication Year: 2011, Page(s): 1056
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    This paper presents travelling-wave micropump. A travelling-wave micropump that increases transport efficiency by 35% has been demonstrated by researchers in China. A team from Nankai University have replaced the traditional straight microchannel with a sawtooth-shaped microchannel that acts as a cascaded diffuser element. This micropump design has the potential to be fabricated on biosensor chips... View full abstract»

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  • Aperture-coupled active antenna with push-pull oscillator

    Publication Year: 2011, Page(s):1059 - 1060
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (271 KB)

    A new aperture-coupled active antenna with a push-pull oscillator is proposed. The generated power of the push-pull oscillator is electromagnetically coupled to the radiating patch via a coupling aperture. By changing the DC bias voltage, the linear frequency tuning range is achieved. The even-order modes in the radiated harmonics are noticeably suppressed owing to the odd mode excitation via the ... View full abstract»

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  • Broadband circularly-polarised patch antenna with 3D meandering strip feed

    Publication Year: 2011, Page(s):1060 - 1062
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (149 KB)

    A wideband single-fed circularly-polarised patch antenna is presented. It is implemented by using a 3D meandering strip to feed a square patch antenna. This antenna has very good circular-polarisation characteristics with wide axial ratio bandwidth, stable radiation patterns and high antenna gain across the operating bandwidth. Results show that the proposed antenna has an impedance bandwidth (SWR... View full abstract»

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  • Quad band-notched UWB antenna compatible with WiMAX/INSAT/lower-upper WLAN applications

    Publication Year: 2011, Page(s):1062 - 1063
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (330 KB)

    A simple design of multilayered quad band-notched ultra-wideband (UWB) antenna is presented. The antenna is compact in size, suitable for UWB applications, and exhibits quad narrow band frequency notches to suppress the interference of the nearby wireless communication systems within a UWB frequency range. The narrow band notches are realised by adding closed-loop ring resonators designed to cover... View full abstract»

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  • Radiation efficiency improvement for dual-mode mobile phone using a slot on a ground plane

    Publication Year: 2011, Page(s):1063 - 1065
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (377 KB)

    A dual-band mobile phone antenna with dual feeders is proposed to improve antenna radiation efficiency in the CDMA band of 824-894 MHz and the GSM band of 880-960 MHz. The proposed antenna consists of two planar inverted-F antennas and a common ground plane with a slot. The electric fields are more confined on each radiating element region at each band in this configuration. Measured results show ... View full abstract»

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  • Travelling-wave piezoelectric micropump with low resistance microchannel

    Publication Year: 2011, Page(s):1065 - 1066
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (211 KB)

    Driven by a travelling wave, a piezoelectric micropump with a sawtooth microchannel is presented. An easy fabrication method is proposed, and the characteristics of the micropump are tested at different frequencies. Compared to the micropump with a straight microchannel, the micropump with a sawtooth microchannel has higher flow rate and back pressure (33.36 l/min and 1.13 kPa) at low voltage beca... View full abstract»

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  • 5 MHz phase detector with low residual flicker

    Publication Year: 2011, Page(s):1066 - 1067
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (170 KB)

    The measurement of close-to-carrier phase modulation (PM) noise of state-of-the-art oscillators is always challenging. Quite often the residual noise of the phase detector used in these measurements is higher than the noise of the source at Fourier offset frequencies between 5 and 100 Hz. A conventional double balanced mixer using 2N2222A transistors as the nonlinear components of a diode ring was... View full abstract»

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  • Full-MOSFET mixed-mode duty cycle corrector

    Publication Year: 2011, Page(s):1067 - 1069
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    A novel mixed-mode 50% duty cycle corrector (DCC) based on a digital process is proposed. The DCC adopts both digital and analogue correction methods in which a half cycle delay line is used for coarse correction, and an analogue feedback loop based on full-MOSFETs for further fine tuning to achieve fast settling and high precision. The rising edge of the output clock has a constant delay compared... View full abstract»

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  • Full-MOSFET mixed-mode duty cycle corrector

    Publication Year: 2011, Page(s):1067 - 1069
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    A novel mixed-mode 50% duty cycle corrector (DCC) based on a digital process is proposed. The DCC adopts both digital and analogue correction methods in which a half cycle delay line is used for coarse correction, and an analogue feedback loop based on full-MOSFETs for further fine tuning to achieve fast settling and high precision. The rising edge of the output clock has a constant delay compared... View full abstract»

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  • Frequency-to-digital conversion based on sampled phase-locked loop with third-order noise shaping

    Publication Year: 2011, Page(s):1069 - 1070
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (142 KB)

    A new frequency-to-digital architecture based on a phase-locked loop (PLL) is presented, where the voltage controlled oscillator output is sampled before being fed back to one of the phase-frequency detector inputs. A frequency discriminator, located at the PLL sampled output, generates the converter output. Simple analytical models show that the sampling error is shaped by a third-order transfer ... View full abstract»

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  • Spur reduction in bang-bang PLLs using programmable bit-stream

    Publication Year: 2011, Page(s):1070 - 1072
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (169 KB)

    All-digital bang-bang phase-locked loops (PLLs) are prone to spurious output tones. In this reported work, a programmable bit-sequence is generated and used as a time-mode dithering signal. The bit-stream can be programmed to emulate the required order of a ΣΔ modulator operating in the time-domain without need for any hardware change. This method leads to a low-cost, compact, low-po... View full abstract»

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  • Design of ESD protection device using body floating technique in 65 nm CMOS process

    Publication Year: 2011, Page(s):1072 - 1073
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (229 KB)

    A floating body electrostatic discharge (ESD) protection circuit positioned between and coupled to an I/O pad and an internal circuit is presented. A small NMOS transistor is used to control the body of a main NMOS transistor. When the small NMOS transistor is triggered, the body of the main NMOS transistor remains grounded. If the small NMOS transistor has not been triggered, the body of the main... View full abstract»

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  • Motion planning approach that produces critical point-free configuration space

    Publication Year: 2011, Page(s):1073 - 1075
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (130 KB)

    A two-dimensional, motion planning approach that derives inspiration from the formation of shadows by opaque objects in the presence of a Gaussian light source is presented. It utilises the `potential field`-like varying intensity of a Gaussian light source coupled with the rectilinear property of light. The method borrows advantages of artificial potential field (APF) methods, such as single path... View full abstract»

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  • Robust local feature extraction algorithm with visual cortex for object recognition

    Publication Year: 2011, Page(s):1075 - 1076
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (111 KB)

    A robust local feature extraction algorithm comprised of two key steps is proposed. The first step is the extraction of feature point candidates from a multi-scale fast Hessian detector at 0° and 45° based on Gabor rotation angles and a multi-scale Harris corner detector based on the Gabor phase. The second step is a MAX operation for selecting points from the outputs of the three fe... View full abstract»

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  • Partial distortion search algorithm based on two-step dmin updating

    Publication Year: 2011, Page(s):1076 - 1078
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (68 KB)

    The encoding process of vector quantisation is computationally very expensive. To reduce distortion computation between the input vector and candidate codewords, the well-known partial distortion search (PDS) algorithm has been proposed. To reduce further its computational cost, a new PDS algorithm is proposed by making current dmin decrease as quickly as possible. Experimental r... View full abstract»

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  • Improved particle filter based on differential evolution

    Publication Year: 2011, Page(s):1078 - 1079
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (134 KB)

    Resampling schemes for a particle filter based on the differential evolution (DE) algorithm are presented. By using these schemes, several types of differential evolution particle filters (DEPFs) are proposed. In the proposed filters, the unscented Kalman filter is utilised to generate the importance proposal distribution and the different DE algorithms are used as the resampling scheme. Simulatio... View full abstract»

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  • Generation of Sidel'nikov sequences and their spectra via permutations

    Publication Year: 2011, Page(s):1079 - 1081
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (100 KB)

    Using a reduced number of distinct permutations, an efficient method to generate Sidel'nikov M-ary sequences and their spectra from an initial seed sequence is presented. The unfolded structure allows an all-digital and low complexity implementation of a maximum likelihood sequence detector. View full abstract»

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  • Compact Butler matrix using composite right/left handed transmission line

    Publication Year: 2011, Page(s):1081 - 1083
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    A novel composite right/left handed transmission line (CRLH TL) is proposed, for the first time using the Wunderlich-shaped dentiform capacitor and meandered-line short-circuited stub inductor (SSI). The CRLH TL features a larger value of CL and in turn a lower resonance relative to the previous one employing an interdigital capacitor and an SSI. The unique feature of the CRLH TL is applied... View full abstract»

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  • High dynamic range 140??220 GHz radiometer using dual-channel superheterodyne receivers

    Publication Year: 2011, Page(s):1083 - 1084
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (99 KB)

    A millimetre-wave radiometer in the range 140-220-GHz using dual-channel superheterodyne receivers is described. The dynamic range of the radiometer is estimated to be 163-dB. The linearity of the receiver is traceable to a low-frequency voltage ratio standard. A 10-120-dB synthesised rotary vane attenuator has been measured with uncertainties of 0.022-0.90-dB at 220-GHz to verify the accuracy of ... View full abstract»

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  • Microwave small-signal modelling of FinFETs using multi-parameter rational fitting method

    Publication Year: 2011, Page(s):1084 - 1086
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    An effective approach based on a multi-parameter rational fitting technique is proposed to model the microwave small-signal response of active solid-state devices. The model is identified by fitting multi-bias scattering-parameter measurements and its analytical expression is implemented in a commercial microwave circuit simulator. The approach has been applied to the modelling of a silicon-based ... View full abstract»

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  • 2.5 Gbit/s burst-mode receiver with power-level burst-detection for XG-PON1 systems

    Publication Year: 2011, Page(s):1086 - 1087
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (238 KB)

    A 2.5 Gbit/s burst-mode receiver with power-level burst-detection and a time-critical control circuit is presented. With its unique topology, this receiver is successfully operated as a long-reach XG-PON1, where the quiet-window for ranging operation exceeds the time variation of the round-trip propagation delay for up to 40 km. View full abstract»

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  • Analysis of RF power optimisation for SCM-based free space optical systems for IM3

    Publication Year: 2011, Page(s):1087 - 1089
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (130 KB)

    The focus of this reported research is on the optimisation of input RF power in SCM-based free space optical (FSO) systems to minimise the average BER because higher input RF power does not always provide FSO systems with better performance, due to the effect of the third-order intermodulation (IM3) product. Analysis results demonstrate the optimum input RF power and the minimum average BER. 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