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Electronics Letters

Issue 21 • Date October 2010

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Displaying Results 1 - 25 of 42
  • In brief

    Publication Year: 2010, Page(s): 1410
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (90 KB)

    First Page of the Article
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  • Interview

    Publication Year: 2010, Page(s): 1410
    IEEE is not the copyright holder of this material | PDF file iconPDF (101 KB)
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  • Dropping through the floor

    Publication Year: 2010, Page(s): 1411
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (301 KB)

    This article discusses the achievement of a European collaboration in a significant reduction of quartz crystal oscillator noise floor. The collaboration from the FEMTO-ST Institute, CNRS, France demonstrate for the first time in 15 years an oder of magnitude in the noise floor reduction over commercial crystal oscillator. The 5 MHz crystal double-oven prototype, which has a flicker frequency modu... View full abstract»

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  • Vivaldi steps up a notch

    Publication Year: 2010, Page(s): 1412
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    This paper is about Vivaldi antenna, a reconfigurable antenna that can switch its operation between three different modes. And it is showing promise for future cognitive radio systems. View full abstract»

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  • Code reading error probability estimation for SAW tag systems with pulse position coding

    Publication Year: 2010, Page(s):1415 - 1416
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (88 KB)

    The code reading error probability is estimated in SAW tag systems employing peak-pulse detection with pulse position coding assuming M groups having N slots each. The error is found as a function of the signal-to-noise ratio, proving an extremely reliable deciphering of the tag code for SNR > 20 dB, meaning less than 1 false per billion of reading. View full abstract»

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  • Altering antenna performance using magnifying wire medium

    Publication Year: 2010, Page(s):1416 - 1417
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (190 KB)

    A tapered wire medium is investigated for purposes of transmission, magnification and demagnification of microwave images with sub-wavelength resolution. An attempt to broaden the limits of wire medium applications is presented. The medium can potentially create unusual field or current distributions at the aperture. This can result in an increased directivity for an antenna or in creating desired... View full abstract»

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  • Compact broad dual-band antenna using inverted-L and loop for DVB-H applications

    Publication Year: 2010, Page(s):1418 - 1419
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    A dual-band (UHF: 470-862-MHz, L: 1452-1492-MHz) digital video broadcasting-handheld antenna is presented. The proposed antenna is composed of a meaner line inverted-L shape and loop antenna for the broadband performance. The measured operation bandwidth of the antenna (VSWR-3.5) is 400-MHz (470-870-MHz) at UHF band and 300-MHz (1380-1680-MHz) at L-band. Moreover, it has an approximately omnidirec... View full abstract»

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  • Dual-band planar monopole antenna loaded with pair of edge resonators

    Publication Year: 2010, Page(s):1419 - 1421
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (337 KB)

    A novel dual-band planar monopole antenna design based on the concept of edge resonator loading is presented. The proposed antenna consists of a pair of symmetry resonators and a bevelled planar radiator. The resonators embedded into the edges of the radiator can provide a new resonance and the resonant frequency can be independently tuned. As an example of this concept, a dual-band antenna protot... View full abstract»

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  • Dual-band printed dipole antenna for wi-fi 802.11n applications

    Publication Year: 2010, Page(s):1421 - 1422
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    A dual-band compact printed dipole antenna for Wi-Fi 802.11n applications in the 2.45 and 5.5 GHz bands is presented. The proposed antenna consists of two printed dipoles with the arms located onto both sides of the dielectric substrate and a bended stripline. This feed scheme makes easy the integration of the antenna with the electronic subsystem and avoids the radiation towards the device. For t... View full abstract»

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  • Hyperbolic tangent tapered slot antenna

    Publication Year: 2010, Page(s):1422 - 1424
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (136 KB)

    A tapered slot antenna, the taper section of which is shaped according to a hyperbolic tangent (tanh) function, is proposed. Characteristics of the antenna are experimentally compared with those of a conventional linearly tapered slot antenna (LTSA). The radiation patterns of the proposed antenna measured at 125 GHz exhibit lower sidelobe levels than those of the LTSA in both the E- and H-planes. View full abstract»

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  • Multimode Vivaldi antenna

    Publication Year: 2010, Page(s):1424 - 1425
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (295 KB)

    A multimode Vivaldi antenna is presented, which is designed to operate either in a wideband mode, a wideband mode with a band rejection or a narrower passband mode. The antenna in a wideband mode is designed to have a bandwidth of 2-8 GHz. In the notch band mode, the antenna has tunable narrow band rejection between 5.2 and 5.7 GHz. The Vivaldi antenna can also operate in a narrow passband mode, w... View full abstract»

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  • Folded-cascode amplifier with efficient feedforward gain-boosting

    Publication Year: 2010, Page(s):1425 - 1426
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (104 KB)

    An efficient implementation of a two-stage feedforward amplifier is proposed. The new amplifier topology boosts the DC gain of a folded-cascode amplifier by adding a gain path, which makes use of the `free` transconductance of the folding current sources. Only a single differential pair is used to convert the input voltage to a current. A current splitter extracts the parts needed for feedforward ... View full abstract»

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  • Multi-step capacitor-splitting SAR ADC

    Publication Year: 2010, Page(s):1426 - 1428
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (210 KB)

    A new architecture is proposed which reduces the power consumption and capacitor area in successive approximation register (SAR) analogue-to-digital converters (ADCs). Two identical capacitor-splitting capacitor arrays are used in a two-step process for quantisation, and this significantly reduces the switching power and capacitor area. View full abstract»

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  • Mutator for transforming memristor into memcapacitor

    Publication Year: 2010, Page(s):1428 - 1429
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (274 KB)

    A recently published circuit that operates as a memcapacitor (MC), utilising a memristor (MR) emulator, is analysed with a confirmation that it simulates MC only approximately. A MR to MC mutator is designed by means of off-the-shelf circuits. The SPICE analysis confirms that this circuit transforms exactly the constitutive relation of MR into the constitutive relation of MC. View full abstract»

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  • Three-level differential buffer for increasing noise margin in pseudo-differential signalling

    Publication Year: 2010, Page(s):1429 - 1431
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    A 5Gbit/s/pin transceiver for high-speed memory interfaces is implemented in a 0.18 m CMOS process. In general, memory interfaces use single-ended signalling with a reference signal because the chip cost is closely related to the number of pins. However, as the data rate increases, reference voltage noise and simultaneous switching noise reduce voltage and timing margin of receiver input signals. ... View full abstract»

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  • Continuous-time update laws with radial basis step length for control of bipedal locomotion

    Publication Year: 2010, Page(s):1431 - 1433
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (77 KB)

    Presented is a novel approach for designing continuous-time update laws to update the parameters of stabilising controllers during continuous phases of bipedal walking such that (i) a general cost function, such as the energy of the control input over single support, can be minimised in an online manner, and (ii) the exponential stability of the corresponding limit cycle for the closed-loop impuls... View full abstract»

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  • Significant step in ultra-high stability quartz crystal oscillators

    Publication Year: 2010, Page(s):1433 - 1434
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (226 KB)

    The best frequency stability ever measured on a quartz crystal oscillator is reported: this new Boitiers à Vieillissement Amèliorè (BVA) oscillator has an estimated flicker frequency modulation floor of 2.5 × 10-14 at 5 MHz. View full abstract»

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  • Stripe-based connected components labelling

    Publication Year: 2010, Page(s):1434 - 1436
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (233 KB)

    A fast stripe-based connected component labelling algorithm is proposed for binary image labelling. Stripe extraction strategy is used to transform the pixel-connected issues, which most of the previously proposed algorithms focused on, into stripe-connected issues. The stripe-union strategy treats the combination of the neighbouring stripes as the mergence of rooted trees. Finally, comparisons ar... View full abstract»

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  • Nerve gas sensor using film bulk acoustic resonator coated with poly (vinylidene fluoride)

    Publication Year: 2010, Page(s):1436 - 1437
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (274 KB)

    A nerve gas sensor based on a film bulk acoustic resonator is presented. The resonator consists of a piezoelectric Au/AlN/Mo stack and a Bragg reflector and has a working resonance near 2.1 GHz. A poly (vinylidene fluoride) layer is coated on the top electrode as a specific chemical recognition. The sensor can yield a rapid, sensitive, reversible and reproducible response to the stimulant of nerve... View full abstract»

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  • 258.16-259.95 GHz injection-locked frequency divider

    Publication Year: 2010, Page(s):1438 - 1439
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    A divide-by-2 injection-locked frequency divider (ILFD) using π-type LC networks is presented. This ILFD is fabricated in a 65 nm CMOS process. Its measured locking range is from 258.16 to 259.95 GHz with an input power of less than -25 dBm. Its power consumption is 3.9 mW from a 1.3 V supply excluding buffers and the bias current. Its area is 0.13 by 0.12 mm without pads. View full abstract»

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  • Programmable CMOS injection-locked frequency divider

    Publication Year: 2010, Page(s):1439 - 1441
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (566 KB)

    A programmable injection-locked frequency divider (ILFD) using a phase-switching technique is presented. The proposed ILFD has been fabricated in a 90 nm CMOS process and has a programmable modulus of six and seven. It consumes 6.7 mW from a 1.2 V supply and the operating range is 18.69-22.8 GHz. The core size measures 123 × 47 m without measurement pads. View full abstract»

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  • Quad-band power divider based on left-handed transmission lines

    Publication Year: 2010, Page(s):1441 - 1442
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (318 KB)

    A quad-band equal power divider has been designed by exploiting the multi-band operation of left-handed transmission lines. Unit cell design based on dispersion analysis is provided. A practical power divider that demonstrates equal power division at frequencies 0.47, 0.8, 1.85 and 3.35 GHz was designed and fabricated by implementing the left-handed cells in microstrip technology. View full abstract»

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  • Broadband six-way waveguide power divider for X-band operation using inductive wall

    Publication Year: 2010, Page(s):1442 - 1444
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    An X-band six-way waveguide power divider using the metallic wall is proposed. For good impedance matching over the broad frequency band, the metallic wall having an inductive component is positioned on the side of the output waveguide. Simulated and measured results show low return loss and low insertion loss. Compared to the waveguide using an inductive post, the proposed divider has much broade... View full abstract»

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  • Compact dual-band bandpass filter using defected microstrip structure for GPS and WLAN applications

    Publication Year: 2010, Page(s):1444 - 1445
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (213 KB)

    A modified defected microstrip structure (DMS) for designing a dual-band bandpass filter with independently controlled centre frequencies is presented. The DMS using an F-shaped spurline embedded into a uniform impedance resonator is applied to generate double-resonance characteristics. Based on this theory, a dual-band filter for GPS/WLAN applications has been designed, analysed and fabricated. I... View full abstract»

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  • Design of microstrip lowpass filters with wide stopband and high attenuation

    Publication Year: 2010, Page(s):1445 - 1447
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (198 KB)

    In this reported work, novel microstrip lowpass filters featuring wide stopband and high attenuation have been developed. These filters are composed of multiple open stubs and short-end coupled lines. By properly selecting the electrical lengths of the open stubs and short-end coupled lines, transmission zeros can be generated in the vicinity of harmonics and a wide stopband can be obtained. Detai... 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