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Electronics Letters

Issue 23 • Date Nov. 7 2013

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Displaying Results 1 - 25 of 53
  • In brief

    Publication Year: 2013, Page(s): 1412
    IEEE is not the copyright holder of this material | PDF file iconPDF (115 KB)
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  • Interview

    Publication Year: 2013, Page(s): 1412
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (83 KB)

    Hiroya Tanaka from Toyota Central Research and Development Laboratories in Japan talks about the work behind the paper 'Memristance enhancement by external voltage source' on page 1446. View full abstract»

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  • Taking the heat

    Publication Year: 2013, Page(s): 1413
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (188 KB)

    Researchers at the Instytut Technologii Materialow Elektronicznych in Warsaw, Poland, have investigated the nature and behaviour of surface acoustic waves (SAW) in temperature compensated NdCa4O(BO3)3 (commonly abbreviated to NdCOB). They have shown that the compensation makes NdCOB a suitable material for sensing in harsh, high temperature conditions, such as thos... View full abstract»

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  • Distinctive propulsion

    Publication Year: 2013, Page(s): 1414
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (298 KB)

    Reading modulations In their Letter, the team from South Africa's Council for Scientifi c and Industrial Research and the University of Cape Town present a method to extract the propeller speed of an approaching aircraft using CR signals, adding to the information available for recognising a target. Their approach uses the effect of a rotating propeller on the polarisation of refl ections of RF si... View full abstract»

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  • Innovative sound transmission system for an intuitive service

    Publication Year: 2013, Page(s):1417 - 1418
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (306 KB)

    An innovative sound transmission system for an intuitive service utilises the human body as a sound transmission medium. By using the human body as a transmission medium, sound generation in the body and sound transmission through the body can be achieved at the same time. Sound generation in the body is based on the nonlinear characteristics of the human body. Two ultrasonic waves with different ... View full abstract»

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  • Accurate calibration of mutual coupling for conformal antenna arrays

    Publication Year: 2013, Page(s):1418 - 1420
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (369 KB)

    The element pattern reconstruction method is proposed to calibrate the mutual coupling effect of conformal antenna arrays. The calibration matrix due to the proposed calibration method is obtained through the transformation of element patterns rather than the analysis of currents or voltages on the antenna array, which is different from previous calibration methods. The new method can provide effe... View full abstract»

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  • Combined three monopoles for GPS/WLAN/GSM/WCDMA/LTE application

    Publication Year: 2013, Page(s):1420 - 1421
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (525 KB)

    A novel compact antenna is designed on a low-loss ceramic material to support multiband operation as well as to reduce the antenna size. Three monopole antennas with a single feed are designed and combined for wireless device applications, occupying only 10 ?? 10 ?? 3 mm3. Structurally, orthogonal placement of the three monopoles provides a relatively simple design process. Across the e... View full abstract»

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  • Metal mount RFID tag antenna excited by integrated loop/IC module

    Publication Year: 2013, Page(s):1421 - 1423
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (293 KB)

    A simple topology is described for radio frequency identification (RFID) tags mountable on metal surfaces. The tag is built around a commercial UHF RFID module combining an IC and a coupling loop. The module is placed in the neighbourhood of a slot which is used both to couple the energy from the module to the patch-like antenna and to miniaturise the tag. A read range of almost 4 m is obtained in... View full abstract»

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  • Sidelobe level correction for parabolic antennas radiation pattern measurements in quasi-far-field conditions

    Publication Year: 2013, Page(s):1423 - 1425
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (235 KB)

    A method and formulae for correction of the sidelobe level of the radiation pattern of a high gain antenna when measured in the Fresnel region are presented. After a thorough analysis of a large number of different cases, trend curves have been computed and an empirical formula has been derived, which allows the correction of the measured values of the sidelobes when the measurement range is below... View full abstract»

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  • Size reduction technique for slot antenna

    Publication Year: 2013, Page(s):1425 - 1426
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    A novel ground plane with a meander line is proposed for the design of a compact slot antenna. By using this new design, size reduction for the slot antenna can be realised. By embedding a meander line into the ground plane of the slot, it is observed that the resonant frequency of the slot antenna significantly decreases, which can lead to a large size reduction for fixed-frequency operation. In ... View full abstract»

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  • Tight upper bound on radiation pattern correlation for N-port MIMO antennas

    Publication Year: 2013, Page(s):1427 - 1428
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (150 KB)

    A tight upper bound on pattern correlation for multi-port antennas is derived. It is valid for lossy antennas and an arbitrary number of ports. As opposed to previous work, the present derivation is based on modal analysis, considering the spectrum of the radiation matrix. The new approach yields a much tighter upper bound on pattern correlation than previously available from per port characterisa... View full abstract»

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  • Tunable 200 GHz lens-coupled annular-slot antennas using Schottky varactor diodes for all-electronic reconfigurable terahertz circuits

    Publication Year: 2013, Page(s):1428 - 1430
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    A tunable lens-coupled annular-slot antenna using a Schottky varactor diode has been designed, fabricated and characterised at 140 to 220 GHz. Simulation results show that the resonant frequency of the annular-slot antenna can be effectively tuned by varying the capacitance of the imbedded varactor diode, with an average tunability of ˜2.5 GHz/fF. Prototype demonstration using a varactor w... View full abstract»

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  • Wideband simplified feed for printed log-periodic dipole array antenna

    Publication Year: 2013, Page(s):1430 - 1432
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (458 KB)

    A novel simple approach is presented for designing a broadband single layer substrate printed log-periodic dipole array (PLPDA) antenna by using microstrip technology. The PLPDA antenna has the merits of wide bandwidth, low profile and light weight, which should be fed by the balanced line. The balanced line, created by the geometric features of the microstrip, provides a balun with a considerably... View full abstract»

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  • Application-specific fine tuning of multi-parameter patient monitors

    Publication Year: 2013, Page(s):1432 - 1433
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (63 KB)

    Multi-parameter patient monitors (MPMs) have become increasingly important in providing quality health care to patients. A high alarm accuracy (sensitivity) will need a lower threshold for alarm detection which will lead to lower no-alarm accuracy (specificity) and viceversa. MPMs when used in an intensive care unit (ICU) need to have high sensitivity. However they need to have high specificity wh... View full abstract»

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  • 0.7-2.7 GHz wideband CMOS low-noise amplifier for LTE application

    Publication Year: 2013, Page(s):1433 - 1435
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    A wideband low-noise amplifier (LNA) for long-term evolution applications is presented. A capacitive cross-coupled common-gate in combination with current-bleeding common-source topologies is adopted for wideband input matching, high gain and low noise figure (NF). Inter-cascade inductors are adopted to cancel the inter-stage parasitics, which extend input matching and operational bandwidth to hig... View full abstract»

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  • Double dual slope multiplier-cum-divider

    Publication Year: 2013, Page(s):1435 - 1436
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (291 KB)

    A novel type of analogue multiplier-cum-divider is described. A square waveform of period T which is proportional to V2/V1, where V2 and V1 are the two input applied voltages, is generated. Another input voltage V3 is integrated during the period T. The peak value of the integrated output is V2V3/V1. View full abstract»

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  • Near-threshold charge pump circuit using dual feedback loop

    Publication Year: 2013, Page(s):1436 - 1438
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (574 KB)

    A near-threshold charge pump circuit suitable for a phase-locked loopbased frequency synthesiser is presented. The charge pump uses gate switches and dual feedback loops to achieve good up/down current matching characteristics in low-voltage operation. The applied gate switches reduce the leakage current and the feedback loops provide a more stable operation. Post-layout simulation results demonst... View full abstract»

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  • Power-gating technique for network-on-chip buffers

    Publication Year: 2013, Page(s):1438 - 1440
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (186 KB)

    A new approach to reducing leakage power in network-on-chip buffers is presented. The non-uniformity of buffer utilisation is leveraged across the network and power-gating is applied to scarcely utilised buffers. Instead of turning-off the buffers completely, a buffer portion is kept turned-on. This design choice has a significant performance benefit because the buffer is always able to receive ne... View full abstract»

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  • Scalable and parameterised VLSI architecture for efficient sparse approximation in FPGAs and SoCs

    Publication Year: 2013, Page(s):1440 - 1441
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (176 KB)

    A parameterised and scalable very large scale integration (VLSI) soft intellectual property (IP) is presented that can be implemented in programmable logic devices, such as field programmable gate arrays (FPGAs) or a system-on-chip design for efficient sparse approximation. The proposed architecture is optimised based on the orthogonal matching pursuit algorithm by both algorithm reformulation and... View full abstract»

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  • Arbitrary load measurement circuit for adaptive impedance tuning circuit

    Publication Year: 2013, Page(s):1441 - 1443
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (406 KB)

    An adaptive impedance tuning circuit (AITC) is used to compensate for the impedance between the arbitrary load impedance and the characteristic impedance of interest. An AITC is required for correct and accurate load impedance measurements. A new type of mismatch measurement circuit that measures the arbitrary load impedance more accurately is proposed and its performance against existing methods ... View full abstract»

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  • Low-complexity twiddle factor generation for FFT processor

    Publication Year: 2013, Page(s):1443 - 1445
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (108 KB)

    A low-complexity twiddle factor generation structure for fast Fourier transform (FFT) is proposed. In FFT, twiddle faction generation and multiplication occupies more area than the other mathematical operations. The proposed structure reduces the twiddle factor generation part by removing the redundancies in the conventional structure and compressing the twiddle factor ROM contents. With the propo... View full abstract»

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  • Low-power pipelined phase accumulator with sequential clock gating for DDFSs

    Publication Year: 2013, Page(s):1445 - 1446
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (385 KB)

    A pipelined phase accumulator (PACC) for direct digital frequency synthesisers (DDFSs) is presented. A highly pipelined structure is inevitable in a PACC design to achieve high-speed performance, which causes a large number of pre-skewing flip-flops (F/Fs) and leads clock signals to be a large source of power dissipation. Since the input data do not change every single cycle, clock gating can save... View full abstract»

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  • Memristance enhancement by external voltage source

    Publication Year: 2013, Page(s):1446 - 1448
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (297 KB)

    A memristance enhancement method using an external voltage source is proposed. The proposed method is suitable for circuit implementation due to the tunability of the external voltage source. Numerical results show a memristance enhancement and an enlarged hysteresis eye-openness of current-voltage characteristics View full abstract»

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  • Resistorless switched-capacitor bandgap voltage reference with low sensitivity to process variations

    Publication Year: 2013, Page(s):1448 - 1449
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (319 KB)

    A novel switched-capacitor bandgap voltage reference circuit is presented that dispenses entirely with the use of resistors. Since capacitors are used instead of resistors, variability problems from devices mismatch and process spread are reduced, compared with traditional topologies. The proportional-to-absolute-temperature drift and the complementary-to-absolute-temperature drift voltages are bo... View full abstract»

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  • Fast genetic algorithm for robot path planning

    Publication Year: 2013, Page(s):1449 - 1451
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (115 KB)

    An efficient genetic algorithm-based robot path planning method is proposed that finds collision-free paths while minimising the distance of the paths obtained. By using an improved evaluation and natural selection process, the proposed robot path planning method provides markedly faster computation and better success rates than well-known conventional methods. 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