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Electronics Letters

Issue 15 • Date July 18 2013

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Displaying Results 1 - 25 of 36
  • In brief

    Publication Year: 2013, Page(s): 910
    IEEE is not the copyright holder of this material | PDF file iconPDF (114 KB)
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  • Interview

    Publication Year: 2013, Page(s): 910
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (102 KB)

    Dr Pablo Acedo Gallardo from Universidad Carlos III de Madrid in Spain talks about the research behind the Letter 'Continuous wave sub-THz photonic generation with VCSEL-based optical frequency comb' on page 944. View full abstract»

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  • THz detectors get in line

    Publication Year: 2013, Page(s): 911
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (198 KB)

    A THz detector for a `smart' measurement system that can be used in a wealth of applications has been developed by researchers in Japan. View full abstract»

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  • Robot-controlled fusion

    Publication Year: 2013, Page(s): 912
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (207 KB)

    Researchers have developed a map-merging technique for multi-robot systems (MRS). Their method can produce an accurate collective map from individual maps built by multiple robots, which allows for more accurate and efficient path planning. When multi-robot systems are implemented in unknown environments, they need a collective map which describes the robots' surroundings. Merging produces this co... View full abstract»

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  • Kind of high-power microwave radial line slot antenna

    Publication Year: 2013, Page(s):915 - 916
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (574 KB)

    A kind of circularly-polarised radial line slot antenna for high-power microwave application is proposed by contriving a kind of radial line slow-wave structure, an improved circularly-polarised radiator unit and a reflection cancelling slot. An antenna prototype with a length of 12 cm and an aperture diameter of 54 cm is designed, which has a gain of 29.0 dBi and an axial ratio of 1.12 at 9.42 GH... View full abstract»

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  • Compact planar triple-band monopole antennas based on a single-loop resonator

    Publication Year: 2013, Page(s):916 - 918
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (461 KB)

    Two compact triple-band monopole antennas consisting of a single-loop resonator (SLR) fed with coplanar waveguide (CPW) and microstrip transmission lines, respectively, are proposed. The SLR exhibiting three resonances is used to achieve the three operating frequency bands ranging from 2.4 to 6 GHz. The proposed triple-band antennas exhibit very well eight-like radiation patterns and low cross-pol... View full abstract»

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  • Differential feeding technique for mm-wave series-fed antenna-array

    Publication Year: 2013, Page(s):918 - 919
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (492 KB)

    A differential feeding technique for a broadband planar antenna-array is presented. The antenna structure is composed of four parallel linear series-fed arrays of four microstrip patches. To cancel the beam tilt versus frequency, one side of the array is fed with in-phase signal, whereas the same out-of-phase signal feeds the opposite side of the array. A rat-race balun is especially designed to g... View full abstract»

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  • High isolation dual-port MIMO antenna

    Publication Year: 2013, Page(s):919 - 921
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (239 KB)

    A compact dual-port multiple-input multiple-output (MIMO) antenna is proposed for 2.4 GHz wireless local area network systems. The radiation element consists of a monopole and a patch ring with two cuts, through which a coplanar waveguide port and a slotline port are constructed. The current distributions of the proposed antenna for both ports excited are simulated and analysed, respectively. Acco... View full abstract»

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  • PIFA with dual-resonance feed structure for enhancement of impedance bandwidth

    Publication Year: 2013, Page(s):921 - 922
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (408 KB)

    A planar inverted-F antenna (PIFA) is presented, which has a dual-resonance feed structure that enhances impedance bandwidth considerably. The proposed antenna fully covers LTE13/GSM850/GSM900 without significant modification of the antenna element fabricated in a small ground clearance. The antenna's impedance bandwidth under VSWR = 3:1 is 733-974 MHz, with a good realised efficiency. View full abstract»

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  • UWB antenna with notched band at 5.5 GHz

    Publication Year: 2013, Page(s):922 - 924
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (337 KB)

    A slot antenna with a notched band at 5.5 GHz is proposed for UWB applications. The basic UWB antenna comprises of a rectangular radiating patch and a ground plane with a tapered shape slot and printed on 1.6 mm-thick FR4 dielectric substrate. To realise a notch band, two symmetrical slits are etched on the slot of the ground plane. Experimental results show that the proposed antenna exhibits wide... View full abstract»

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  • Film bulk acoustic biosensor for detection of trace pesticide residues in agricultural products

    Publication Year: 2013, Page(s):924 - 925
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (311 KB)

    A highly sensitive, rapid and convenient biosensor based on film bulk acoustic resonator has been developed for detection of pesticide residues in agricultural products. When the pesticide molecules are bound to the immobilised antibodies on the resonator sensing surface, the resonant frequency is obviously reduced because of additional mass. Trace pesticide in the solutions was detected through r... View full abstract»

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  • Optimised LNA for wireless link in brain machine interface applications

    Publication Year: 2013, Page(s):925 - 927
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (194 KB)

    Presentsed is an optimised design for the RF CMOS low-noise amplifier (LNA) as the analogue front-end circuit for the brain-machine interface's transceiver with an emphasis on the tradeoff between gain, noise and power consumption. A 360 nm cascode LNA operating in 404 MHz of the Medical Implant Communication Service frequency band is designed to demonstrate good performance achievable in the micr... View full abstract»

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  • Non-stationarity of body area networks for sleep monitoring

    Publication Year: 2013, Page(s):927 - 929
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (135 KB)

    The stationarity of the body area network (BAN) channel when the subject is sleeping is examined. The authors question the validity of first- and second-order distribution fits to BAN channel gain. Wide sense stationarity tests have an upper bound at 70% probability for a maximum data length of 5 s. For data lengths greater than 5 s, the probability of stationarity rapidly diminishes. It is shown ... View full abstract»

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  • Pre-emphasis transmitter (0.007 mm2, 8 Gbit/s, 0-14 dB) with improved data zero-crossing accuracy in 65 nm CMOS

    Publication Year: 2013, Page(s):929 - 930
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (607 KB)

    A pre-emphasis transmitter with improved data zero-crossing accuracy is described. It is achieved via data re-synchronisation using a set of extended true single-phase clock latches before output combining, constituting a robust, area- and power-efficient solution. Fabricated in 65 nm CMOS, the full-rate one-tap pre-emphasis transmitter measures a total jitter of 33.12 ps up to an 8 Gbit/s data ra... View full abstract»

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  • Slew rate enhancement via excessive transient feedback

    Publication Year: 2013, Page(s):930 - 932
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    A simple yet very effective slew rate enhancement (SRE) method is proposed. The proposed SRE feedback is normally off and is activated only when an excessive transient signal in the output stage indicates the onset of slewing. Therefore, the method does not degrade the small signal performances or the linearity of amplifiers as do most existing SRE techniques. The new SRE applies to both single-st... View full abstract»

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  • Accurate map merging with virtual emphasis for multi-robot systems

    Publication Year: 2013, Page(s):932 - 934
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (445 KB)

    A new grid map-merging technique which consists of virtual emphasis by one-way observation, curvature-based map matching and particle swarm optimisation is proposed. The proposed technique can improve not only the accuracy of map merging, but also the flexibility of multi-robot systems. The improved performance is verified by showing higher similarities than the existing map-merging techniques in ... View full abstract»

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  • Towards less conservative stabilisation conditions for Markovian jump linear systems with partly unknown transition probabilities

    Publication Year: 2013, Page(s):934 - 936
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (110 KB)

    The problem of deriving less conservative stability and stabilisation conditions for a class of discrete-time Markovian jump linear systems with partly unknown transition probabilities is investigated. To do so, traditional conditions under consideration are first formulated to be with homogeneous polynomial dependence on partly unknown transition probabilities, and then be converted into a finite... View full abstract»

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  • Simple shielding evaluation method of small shield cans on printed circuit boards in mobile devices

    Publication Year: 2013, Page(s):936 - 938
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (660 KB)

    A simple shielding evaluation method of small shield cans using a transverse electromagnetic cell and a specially designed test printed circuit board is proposed. Numerical modelling of the measurement setup using a commercial three-dimensional electromagnetic field simulator is also introduced to verify the measurement. From measurement and simulation, reliable results for shielding evaluation of... View full abstract»

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  • Distortion-correcting algorithm of intracoding for flat region in depth map

    Publication Year: 2013, Page(s):938 - 939
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (176 KB)

    An efficient distortion-correcting algorithm for the intra-coding of a depth map is presented by considering the property of the flat area in a depth map. The influence of the distortion of reference pixels on the rate-distortion (RD) cost function of the macro-block (MB) in a flat region of a depth map is analysed. Then, the RD performance of the flat region is improved by correcting the distorti... View full abstract»

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  • Method for correcting both errors and erasures of RS codes using error-only and erasure-only decoding algorithms

    Publication Year: 2013, Page(s):940 - 941
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (67 KB)

    A method for correcting both errors and erasures of Reed-Solomon (RS) codes using error-only and erasure-only decoding algorithms is proposed. First, the method removes the effect of erasures from syndromes, then it uses error-only and erasure-only correcting processes to correct errors and erasures, respectively; thus, the overall decoding complexity can be reduced substantially. Furthermore, wit... View full abstract»

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  • Improved estimation scheme for disturbance due to dead time and inverter nonlinearity in inverter-fed PMSM drive

    Publication Year: 2013, Page(s):941 - 943
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (297 KB)

    An improved estimation scheme for disturbance due to the dead time and inverter nonlinearity in an inverter-fed permanent magnet synchronous motor (PMSM) drive is presented. The proposed scheme is based on a signal processing and harmonic component extraction and does not require any additional circuits nor parameter information. Furthermore, it is faster to estimate the disturbance as compared wi... View full abstract»

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  • Wideband SIW power divider with improved out-of-band rejection

    Publication Year: 2013, Page(s):943 - 944
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (237 KB)

    A wideband substrate integrated waveguide (SIW) power divider with enhanced out-of-band rejection is proposed. Periodic butterfly radial slots are etched on top layer of SIW to realise a pass-band combining with high-pass characteristics of SIW. An experimental circuit has been fabricated by the standard printed circuit board process. Simulated results are compared with measured data and good agre... View full abstract»

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  • Continuous wave sub-THz photonic generation with VCSEL-based optical frequency comb

    Publication Year: 2013, Page(s):944 - 945
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    A simple and energy-efficient photonic system to generate continuously tunable, low phase noise, sub-THz waves based on COTS components is presented. The optical scheme is based on the use of a commercial vertical cavity surface emitting laser under gain switching modulation that provides a very flat optical frequency comb generator (OFCG) with 23 modes in a 20 dB bandwidth. The laser only needs 1... View full abstract»

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  • Elliptic response bandpass filter based on complementary CMRC

    Publication Year: 2013, Page(s):945 - 947
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (371 KB)

    A bandpass filter with an elliptic response is presented based on a complementary compact microstrip resonant cell (CCMRC). It can be designed by following the traditional coupled resonator theory. An example filter is fabricated and measured. It is shown that the proposed elliptic response CCMRC has high selectivity, compact size, low insertion loss and a wide upper stopband, making it promising ... View full abstract»

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  • Frequency transposing measurement technique for oscillator comparisons

    Publication Year: 2013, Page(s):947 - 949
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (610 KB)

    A measurement technique whereby one can measure the relative phase fluctuations and frequency stability of two oscillators operating at different frequencies, both well above the operating bandwidth of any available phase noise measurement test set, is presented and verified experimentally. 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