Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 42, Issue 8, 13 April 2006
Volumes & issues:
-
Volume 59 (2023)
-
Volume 58 (2022)
-
Volume 57 (2021)
-
Volume 56 (2020)
-
Volume 55 (2019)
-
Volume 54 (2018)
-
Volume 53 (2017)
-
Volume 52 (2016)
-
Volume 51 (2015)
-
Volume 50 (2014)
-
Volume 49 (2013)
-
Volume 48 (2012)
-
Volume 47 (2011)
-
Volume 46 (2010)
-
Volume 45 (2009)
-
Volume 44 (2008)
-
Volume 43 (2007)
-
Volume 42 (2006)
-
Volume 41 (2005)
-
Volume 40 (2004)
-
Volume 39 (2003)
-
Volume 38 (2002)
-
Volume 37 (2001)
-
Volume 36 (2000)
-
Volume 35 (1999)
-
Volume 34 (1998)
-
Volume 33 (1997)
-
Volume 32 (1996)
-
Volume 31 (1995)
-
Volume 30 (1994)
-
Volume 29 (1993)
-
Volume 28 (1992)
-
Volume 27 (1991)
-
Volume 26 (1990)
-
Volume 25 (1989)
-
Volume 24 (1988)
-
Volume 23 (1987)
-
Volume 22 (1986)
-
Volume 21 (1985)
-
Volume 20 (1984)
-
Volume 19 (1983)
-
Volume 18 (1982)
-
Volume 17 (1981)
-
Volume 16 (1980)
-
Volume 15 (1979)
-
Volume 14 (1978)
-
Volume 13 (1977)
-
Volume 12 (1976)
-
Volume 11 (1975)
-
Volume 10 (1974)
-
Volume 9 (1973)
-
Volume 8 (1972)
-
Volume 7 (1971)
-
Volume 6 (1970)
-
Volume 5 (1969)
-
Volume 4 (1968)
-
Volume 3 (1967)
-
Volume 2 (1966)
-
Volume 1 (1965)
Volume 42, Issue 8
13 April 2006
-
- Author(s): A. Benlarbi-Delaï ; M. Bocquet ; Ch. Loyez
- Source: Electronics Letters, Volume 42, Issue 8, p. 435 –436
- DOI: 10.1049/el:20060121
- Type: Article
- + Show details - Hide details
-
p.
435
–436
(2)
An appropriate technique dedicated to indoor channel sounding and characterisation is described. Generally screened by strong line of sight (LOS) signals, weak non-line of sight multipath is difficult to detect and to quantify accurately. For this reason the nulling interferometric approach, well suited for achieving LOS dimming, is proposed to emphasise multipath contributions. Preliminary experimental results, performed in the millimetre band, are presented. - Author(s): S.H. Kim ; J.H. Choi ; J.W. Baik ; Y.S. Kim
- Source: Electronics Letters, Volume 42, Issue 8, p. 436 –438
- DOI: 10.1049/el:20060428
- Type: Article
- + Show details - Hide details
-
p.
436
–438
(3)
A coplanar waveguide (CPW) fed log-periodic dumb-bell slot antenna array is presented. Due to the log-periodic structure and dumb-bell slot, the proposed antenna operates as a frequency independent antenna. The antenna is printed on a substrate with a single metal layer and therefore is easily constructed. The measured return loss and radiation patterns are also included. - Author(s): Y.-C. Lin and K.-J. Hung
- Source: Electronics Letters, Volume 42, Issue 8, p. 438 –439
- DOI: 10.1049/el:20060009
- Type: Article
- + Show details - Hide details
-
p.
438
–439
(2)
A simple and compact design of dual-band slot antenna is presented. Fed by a CPW, the antenna is printed on a single-layer PCB with extremely low manufacturing cost. A pair of T-match stubs is employed to generate the dual resonances in the 2.4–2.5 and 5–6 GHz bands. The antenna of small radiating area 11×28 mm2 is demonstrated on an FR4 PCB with ground plane size of 31×35 mm2. Robust radiation performances are achieved, including in-band gain flatness within +/− 0.5 dB and polarisation isolation better than 15 dB. Consistent radiation patterns for both bands are obtained with peak gains about 3 and 4 dBi in the lower and upper bands, respectively. - Author(s): S.-E. Lee ; K.-S. Oh ; C.-G. Kim
- Source: Electronics Letters, Volume 42, Issue 8, p. 439 –441
- DOI: 10.1049/el:20060822
- Type: Article
- + Show details - Hide details
-
p.
439
–441
(3)
Frequency selective fabric composites that transmit microwaves in certain frequency bands are proposed. The composites consist of carbon fibres and low-loss dielectric fibres that together build periodic patterns. Unlike existing metallic frequency selective surfaces, the frequency selective fabric composite with additional load-carrying capability showed an amount of transmission near a resonance frequency. - Author(s): X.-L. Liang ; S.-S. Zhong ; W. Wang
- Source: Electronics Letters, Volume 42, Issue 8, p. 441 –442
- DOI: 10.1049/el:20060438
- Type: Article
- + Show details - Hide details
-
p.
441
–442
(2)
A planar monopole antenna with an extremely wide bandwidth is introduced, which is composed of an elliptical monopole patch and a trapeziform ground plane, both printed on the same side of a substrate, and is fed by a tapered CPW feeder in the middle of the ground plane. The simulated and experimental results demonstrate that this antenna achieves a ratio impedance bandwidth of 21.6:1 for VSWR≤2, and exhibits a nearly omnidirectional radiation pattern, while its area is only about 0.19λl×0.16λl where λl is the wavelength of the lowest operating frequency. - Author(s): W. Shen and W.X. Zhang
- Source: Electronics Letters, Volume 42, Issue 8, p. 443 –444
- DOI: 10.1049/el:20064482
- Type: Article
- + Show details - Hide details
-
p.
443
–444
(2)
A simple and novel structure of a tapered slotline antenna with a synthesised radiation pattern is proposed. By means of a non-symmetric taper profile with corrugated edges and a backed plate, a special vertical pattern for a base station of mobile communication is performed. The measurement pattern of a scaled sample at 10 GHz possesses 4° beam tilting, suppressed sidelobe (−19.9 dB) in the upper side and null filling in the lower side of the vertical pattern;65° HPBW in the horizontal pattern; and 11.7 dBi of gain.The frequency coverage for VSWR < 2:1 exceeded 3:1 (5.56–16.8) GHz. - Author(s): P. Linardakis ; G. Borg ; N. Martin
- Source: Electronics Letters, Volume 42, Issue 8, p. 444 –446
- DOI: 10.1049/el:20064259
- Type: Article
- + Show details - Hide details
-
p.
444
–446
(3)
Lenses based on plasma could offer an alternative to electronic beam steering at high frequencies (∼100 GHz) and high powers. Presented are beam deflection measurements for a lens which exhibits wide angle deflections (25°), good collimation and rapid beam steering (∼100 µs). A practical prototpe is described. - Author(s): D. Piazza and K.R. Dandekar
- Source: Electronics Letters, Volume 42, Issue 8, p. 446 –447
- DOI: 10.1049/el:20060221
- Type: Article
- + Show details - Hide details
-
p.
446
–447
(2)
A reconfigurable microstrip dipole antenna solution for multiple-input multiple-output (MIMO) communication systems making use of orthogonal frequency division multiplexing (OFDM) is presented. When applied to closely spaced antenna arrays, this method can increase link capacity. The benefits of this novel antenna solution are demonstrated by channel capacity measurements taken in an indoor environment with a 2×2 MIMO system. - Author(s): Y.-J. Ren and K. Chang
- Source: Electronics Letters, Volume 42, Issue 8, p. 447 –449
- DOI: 10.1049/el:20060210
- Type: Article
- + Show details - Hide details
-
p.
447
–449
(3)
An elliptical ring antenna fed by a coplanar waveguide line for ultra-wideband applications is presented. The wideband performance is achieved by extending the length of the elliptical ring's major axis. The elliptical ring antenna has a 2:1 VSWR (return loss <10 dB) from 4.6 to 10.3 GHz and has an average gain of 4.48 dBi. The antenna radiation patterns show a stable variation within its operation band. The parameters determining the antenna wideband characteristic are discussed and the measured performance is presented.
Broadband nulling interferometry for weak multipath signal detection
CPW-fed log-periodic dumb-bell slot antenna array
Design of dual-band slot antenna with double T-match stubs
Electromagnetic characteristics of frequency selective fabric composites
Elliptical planar monopole antenna with extremely wide bandwidth
Pattern synthesis of non-symmetric tapered slotline antenna
Plasma-based lens for microwave beam steering
Reconfigurable antenna solution for MIMO-OFDM systems
Ultra-wideband planar elliptical ring antenna
-
- Author(s): J.L. Li ; M. Musha ; A. Shirakawa ; K.-I. Ueda ; L.X. Zhong
- Source: Electronics Letters, Volume 42, Issue 8, p. 449 –450
- DOI: 10.1049/el:20060182
- Type: Article
- + Show details - Hide details
-
p.
449
–450
(2)
The strong optical bistability in a ytterbium-doped fibre (YDF) laser is demonstrated, which is due to the saturable absorption of the unpumped YDF stage. The bistable regions of both the signal output and residual pump light are 320 mW within an antiphase manner with respect to each other. The signal output and residual pump light also exhibit self-pulsing instability. A bifurcated laser cavity configuration for switchable dual-wavelength generation is predicted based on the optical bistability of the residual pump power. - Author(s): T. Zhu ; Y.J. Rao ; J.L. Wang ; M. Liu
- Source: Electronics Letters, Volume 42, Issue 8, p. 451 –452
- DOI: 10.1049/el:20064446
- Type: Article
- + Show details - Hide details
-
p.
451
–452
(2)
The transverse-load characteristics of a twisted long-period fibre grating (LPFG) written by high-frequency CO2 laser pulses are investigated for the first time to the authors' knowledge. It is observed that such a twisted LPFG can weaken the strong orientation-dependence of the transverse load and enhance the transverse-load sensitivity considerably, when compared with a torsion-free LPFG, offering the potential for use as a dynamic load sensor by means of simple intensity detection.
Strong optical bistability in ytterbium-doped fibre laser with reabsorption
Transverse-load characteristics of twisted long-period fibre gratings written by high-frequency CO2 laser pulses
-
- Author(s): T. Kim and H.S. Yang
- Source: Electronics Letters, Volume 42, Issue 8, p. 452 –454
- DOI: 10.1049/el:20064207
- Type: Article
- + Show details - Hide details
-
p.
452
–454
(3)
An algorithm to extend greyscale histogram equalisation to colour images is proposed. Unlike most current techniques, the proposed method can generate a uniform colour histogram, thus minimising disparity between histogram and uniform distribution. The method is applicable to higher dimensions. The results show that the approach is valid. - Author(s): S.-Q. Yuan and Y.-H. Tan
- Source: Electronics Letters, Volume 42, Issue 8, p. 454 –455
- DOI: 10.1049/el:20063933
- Type: Article
- + Show details - Hide details
-
p.
454
–455
(2)
Noise detection-based median filters have been widely applied to impulse noise reduction. However, the number of pixels misclassified is obviously increased in high noise density. To overcome such drawback, a difference-type noise detector is proposed. In image filtering, a noise detection-based adaptive median algorithm is presented. Experimental results show that the proposed filter can well remove the impulse noise and preserve more details of original images. - Author(s): J. Park and W. Lee
- Source: Electronics Letters, Volume 42, Issue 8, p. 455 –457
- DOI: 10.1049/el:20063897
- Type: Article
- + Show details - Hide details
-
p.
455
–457
(3)
A laser-based standalone tracking system is presented. To transform a laser beam into a structured pattern, a diffractive optical element was used. By analysing the projected pattern shape, the co-ordinate transform between the laser and its projection was computed in real-time. Computed transform was used for virtual object overlays in Augmented Reality.
Colour histogram equalisation via least-squares fitting of isotropic Gaussian mixture to uniform distribution
Difference-type noise detector for adaptive median filter
Laser-based standalone tracking system
-
- Author(s): I.-H. Wang ; J.-L. Lin ; S.-I. Liu
- Source: Electronics Letters, Volume 42, Issue 8, p. 457 –459
- DOI: 10.1049/el:20060247
- Type: Article
- + Show details - Hide details
-
p.
457
–459
(3)
Input signal feedthrough in a high-speed track-and-hold (T/H) circuit often degrades the performance of analogue-to-digital data converters. A 10 GSamples/s CMOS T/H circuit with input feedthrough cancellation is proposed. This T/H circuit has been fabricated in 0.18 µm CMOS process. It achieves 5-bit resolution in 2.5 GHz analogue input signal at 10 GSamples/s. - Author(s): S.L. Morton ; A.E. Cosand ; D.A. Hitko ; C. Baringer ; L. Luh ; C.-M. Lin ; J.F. Jensen ; C.-M. Li ; D. Crampton
- Source: Electronics Letters, Volume 42, Issue 8, p. 459 –460
- DOI: 10.1049/el:20060150
- Type: Article
- + Show details - Hide details
-
p.
459
–460
(2)
A wideband subsampling track-and-hold amplifier has been designed for input frequencies up to Ku-band and clock rates up to 2.5 GS/s. Circuits were fabricated in 1 µm InP SHBT technology. Spur-free dynamic range measured with two-tone input frequencies of 12.6 and 12.602 GHz and a 2.5 GS/s clock rate ranges from 53–69 dB at an input level of −1 dBFS for each tone. Signal-to-noise ratio (SNR) test results show that the master/slave (M/S) track-and-hold design provides 59 dB of SNR in a 1 GHz bandwidth at input frequencies up to at least 2.6 GHz. A single track-and-hold dissipates 1.5 W while the M/S configuration dissipates 2.5 W. - Author(s): M. Leonard and R.S. Dhariwal
- Source: Electronics Letters, Volume 42, Issue 8, p. 460 –462
- DOI: 10.1049/el:20060400
- Type: Article
- + Show details - Hide details
-
p.
460
–462
(3)
The practical testing of a prototype microturbine module has shown that the levitation of the rotor that was predicted from previous simulation results does indeed take place and can enhance the performance of the device since contact friction can be considerably reduced. Some preliminary results on the operation of the module are presented. - Author(s): B. Shi and Y.W. Chia
- Source: Electronics Letters, Volume 42, Issue 8, p. 462 –463
- DOI: 10.1049/el:20064413
- Type: Article
- + Show details - Hide details
-
p.
462
–463
(2)
A low-noise amplifier (LNA) for ultra-wideband (UWB) is presented. The LNA, consisting of two gain stages in multiple feedback loops, achieves a flat power gain of a nominal 20 dB and a noise figure of 2.8–4.7 dB over the 3.1–10.6 GHz UWB band. Implemented in a 0.25 µm SiGe BiCMOS process, the amplifier occupies 0.34 mm2 and draws 11 mA from a 2.7 V supply.
5-bit, 10 GSamples/s track-and-hold circuit with input feedthrough cancellation
Ku-band subsampling track-and-hold amplifier with 8 ENOB resolution
Manufacture and testing of prototype microturbine module
Ultra-wideband SiGe low-noise amplifier
-
- Author(s): V. Coda ; M. Chauvet ; F. Pettazzi ; E. Fazio
- Source: Electronics Letters, Volume 42, Issue 8, p. 463 –465
- DOI: 10.1049/el:20060520
- Type: Article
- + Show details - Hide details
-
p.
463
–465
(3)
The realisation of a 1×4 optical integrated routing circuit is reported. The router is composed of multiple adjacent circular waveguides formed with self-focused beams by photorefractive effect inside a congruent photonic-grade lithium niobate wafer. The routing ability of the 3-D optical component is demonstrated and characterised. - Author(s): R. Hanfoug ; L.M. Augustin ; Y. Barbarin ; J.J.G.M. van der Tol ; E.A.J.M. Bente ; F. Karouta ; D. Rogers ; S. Cole ; Y.S. Oei ; X.J.M. Leijtens ; M.K. Smit
- Source: Electronics Letters, Volume 42, Issue 8, p. 465 –466
- DOI: 10.1049/el:20064422
- Type: Article
- + Show details - Hide details
-
p.
465
–466
(2)
A 3 dB multimode interference (MMI) coupler optimised for low reflections is presented. The MMI was designed, fabricated and characterised. For comparison, MMIs with non-optimised layout have been included on the same sample. The measurement results show a reduction in reflectivities of more than 10 dB.
3-D integrated optical interconnect induced by self-focused beam
Reduced reflections from multimode interference couplers
-
- Author(s): J. Choi
- Source: Electronics Letters, Volume 42, Issue 8, p. 467 –468
- DOI: 10.1049/el:20060619
- Type: Article
- + Show details - Hide details
-
p.
467
–468
(2)
A novel structure for noise isolation in ultra-wideband applications is designed, fabricated and measured. The structure is a hybrid alternating impedance electromagnetic bandgap (AI-EBG) structure and shows excellent noise isolation over 10 GHz. This cost-effective hybrid AI-EBG structure shows better noise isolation and suppression capability (over −80 dB isolation on average in an ultra-wide stopband range) than any reported EBG-based structures. - Author(s): W.J. Kim ; K.J. Cho ; S.P. Stapleton ; J.H. Kim
- Source: Electronics Letters, Volume 42, Issue 8, p. 468 –470
- DOI: 10.1049/el:20060606
- Type: Article
- + Show details - Hide details
-
p.
468
–470
(3)
A unique baseband derived RF predistortion system which uses lookup table coefficients extracted at baseband that directly RF envelope modulate a quadrature vector modulator is presented. The primary advantages of this architecture are that it combines the narrowband advantage of envelope predistortion with the accuracy of baseband predistortion. - Author(s): C.C. Wong and C.E. Free
- Source: Electronics Letters, Volume 42, Issue 8, p. 470 –471
- DOI: 10.1049/el:20060316
- Type: Article
- + Show details - Hide details
-
p.
470
–471
(2)
A new defected ground structure (DGS) pattern with enhanced effective capacitance is presented. The increase in effective capacitance enables the new DGS pattern to achieve a lower resonance than the dumb-bell shaped DGS pattern for the same etched square area dimension. Simulation and experimental results show that a 1.32 GHz lower resonance is achieved with the new DGS pattern, compared to a dumb-bell shaped DGS pattern. - Author(s): W. Ciccognani ; F. Di Paolo ; F. Giannini ; E. Limiti ; P.E. Longhi ; A. Serino
- Source: Electronics Letters, Volume 42, Issue 8, p. 471 –472
- DOI: 10.1049/el:20060710
- Type: Article
- + Show details - Hide details
-
p.
471
–472
(2)
The design procedure and measurements of a C-band high-performanceGaAs cryo-cooled low noise amplifier (LNA) are presented. The latter provides 30 dB gain, a noise figure (NF) lower than 0.12 dB (i.e. 8 K equivalent noise temperature) at 25 K operating temperature, with 35 mW DC bias power only. An appropriate scaling of the device gate periphery has been adopted to trade-off the LNA's NF and DC power consumption. - Author(s): F. Zhang ; J.Z. Gu ; C.Y. Gu ; L.N. Shi ; C.F. Li ; X.W. Sun
- Source: Electronics Letters, Volume 42, Issue 8, p. 472 –474
- DOI: 10.1049/el:20064151
- Type: Article
- + Show details - Hide details
-
p.
472
–474
(3)
A novel beeline compact microstrip resonant cell (BCMRC) is proposed. Its photonic bandgap and slow-wave effect are evaluated. A lowpass filter, consisting of three BCMRCs connected in series, exhibits advantages of low insertion loss in the passband, sharp, high and wide rejection in the stopband and compact size. Experimental and simulated results match well.
Alternating impedance electromagnetic bandgap structure for noise isolation in ultra-wideband
Baseband derived RF digital predistortion
DGS pattern with enhanced effective capacitance
GaAs cryo-cooled LNA for C-band radioastronomy applications
Lowpass filter with in-line beeline CMRC
-
- Author(s): Y. Qin
- Source: Electronics Letters, Volume 42, Issue 8, p. 474 –476
- DOI: 10.1049/el:20064028
- Type: Article
- + Show details - Hide details
-
p.
474
–476
(3)
The network throughput in ad hoc wireless networks under a hierarchical routing (e.g. cluster-based) scheme is investigated. Some works have studied the routing overhead of hierarchical base routing. However, there is little formal analysis that considers its influence on the network performance metric, e.g. throughput, incurred by these procedures. Provided is a theoretical computation on the throughput of the ad hoc wireless networks under a cluster-based structure. Discussed is the issue that the throughput of such ad hoc networks is relatively smaller by a factor of O(N2/N1), N2 is the number of cluster-head nodes and N1 is the number of all the nodes in a network. Hence, there is a trade-off between the gain from routing overhead and loss from network throughput in the design of hierarchical routing for ad hoc networks which need to be optimised. The result has many implications for the hierarchical structure wireless networks. - Author(s): B. Bakkaloglu ; S. Kiaei ; R. Dwyer
- Source: Electronics Letters, Volume 42, Issue 8, p. 476 –478
- DOI: 10.1049/el:20064318
- Type: Article
- + Show details - Hide details
-
p.
476
–478
(3)
A linear bandwidth extension technique that can overcome envelope path bandwidth limitations in polar modulation transmitters is presented. Experimental results show that the proposed technique can suppress intermodulation distortion due to envelope path bandwidth limitations by 18 dB up to 1 GHz for modulation bandwidths up to 500 kHz. This technique enables a low bandwidth supply regulator to be used with a high efficiency nonlinear RF power amplifier for wideband communication systems. - Author(s): A.D. Sarma ; N. Prasad ; T. Madhu
- Source: Electronics Letters, Volume 42, Issue 8, p. 478 –479
- DOI: 10.1049/el:20063036
- Type: Article
- + Show details - Hide details
-
p.
478
–479
(2)
The GAGAN system is planned for air-navigation over the Indian service region. As India comes essentially under the low-latitude region, where the ionospheric behaviour is highly dynamic, the grid-based ionospheric models suitable for mid-latitude regions are not appropriate. The primary tasks in developing an ionospheric model for GAGAN are to take total electron content (TEC) measurements at fixed reference stations using dual frequency GPS receivers and combine them in real-time to estimate the current state of the ionosphere. The estimated vertical delays using six prominent grid-based ionospheric models for the multiple TEC stations data corresponding to quiet days and a disturbed day are presented and compared. - Author(s): B. Özbek and D. Le Ruyet
- Source: Electronics Letters, Volume 42, Issue 8, p. 479 –481
- DOI: 10.1049/el:20064359
- Type: Article
- + Show details - Hide details
-
p.
479
–481
(3)
Orthogonal space-frequency block coded (SFBC) orthogonal frequency division multiplexing (OFDM) systems are analysed in broadband wireless channels where adjacent subcarriers do not have the same channel coefficients and the matched filter receiver causes an error floor in bit error rate performance. To avoid this, a low complexity zero forcing (ZF) receiver for the orthogonal schemes with two and three transmit and one receive antennas are proposed. - Author(s): L. Carrasco ; J. Ramis ; G. Femenias
- Source: Electronics Letters, Volume 42, Issue 8, p. 481 –482
- DOI: 10.1049/el:20060274
- Type: Article
- + Show details - Hide details
-
p.
481
–482
(2)
Analytical expressions for the average bit error rate in the reverse link of a DS-CDMA system with coexisting fast and slow power controlled users are presented. The combined effects of a frequency selective Nakagami fading channel with an arbitrary multipath intensity profile, the power control error and the use of a cell selection process based on a minimum attenuation criterion are considered.
Analysis of cluster-based hierarchical routing in ad hoc wireless networks
Bandwidth extension technique for polar modulated RF transmitters
Investigation of suitability of grid-based ionospheric models for GAGAN
Low complexity ZF receiver for orthogonal SFBC-OFDM in broadband wireless channels
Reverse link average BER of DS-CDMA system with fast and slow power controlled users
-
- Author(s): A. Hurtado ; A. Gonzalez-Marcos ; I.D. Henning ; M.J. Adams
- Source: Electronics Letters, Volume 42, Issue 8, p. 483 –484
- DOI: 10.1049/el:20060478
- Type: Article
- + Show details - Hide details
-
p.
483
–484
(2)
An experimental observation of power and wavelength optical bistability and nonlinear gain in a 1550 nm vertical-cavity semiconductor optical amplifier (VCSOA) operated in reflection and biased above and below threshold is reported. Two distinct types of optical bistability, clockwise and anticlockwise, are observed.
Optical bistability and nonlinear gain in 1.55 µm VCSOA
-
- Author(s): B.K. Kim ; H. Park ; S. Park ; K. Kim
- Source: Electronics Letters, Volume 42, Issue 8, p. 484 –485
- DOI: 10.1049/el:20060246
- Type: Article
- + Show details - Hide details
-
p.
484
–485
(2)
A novel optical access network with Manchester coded downstream and remodulated NRZ coded upstream is proposed and experimentally implemented in a 20 km standard singlemode fibre network. When the downstream light source is reused for the upstream signal, acceptably small penalty was observed compared to the unmodulated light source case. - Author(s): A.D. Ellis and C.W. Chow
- Source: Electronics Letters, Volume 42, Issue 8, p. 485 –487
- DOI: 10.1049/el:20060385
- Type: Article
- + Show details - Hide details
-
p.
485
–487
(3)
A novel transmitter for 100 Gbit-Ethernet applications is proposed, based on the serial cascade of two 50 Gbit/s inverse-return-to-zero (also known as dark soliton) transmitters based on Mach-Zehnder modulators. The proposed transmitter and demultiplexer system uses commercially available components optimised for 40 Gbit/s applications. A 2.9 dB penalty at 100 Gbit/s is obtained using a single-stage OTDM demultiplexer and a preamplified receiver.
Optical access network scheme with downstream Manchester coding and upstream NRZ remodulation
Serial OTDM for 100 Gbit-Ethernet applications
-
- Author(s): G.-W. Choi ; N.-H. Kim ; Y.-J. Seo ; W.-S. Lee
- Source: Electronics Letters, Volume 42, Issue 8, p. 487 –489
- DOI: 10.1049/el:20060156
- Type: Article
- + Show details - Hide details
-
p.
487
–489
(3)
Indium tin oxide (ITO) thin film was prepared by a chemical mechanical polishing (CMP) process for good surface morphology. The optical transmittance of ITO thin film was improved after the CMP process as a result of the optimised process parameters compared to that of as-deposited thin film before the CMP process. - Author(s): T. Nakayama ; Y. Ando ; Y. Okamoto ; T. Inoue ; H. Miyamoto
- Source: Electronics Letters, Volume 42, Issue 8, p. 489 –490
- DOI: 10.1049/el:20064384
- Type: Article
- + Show details - Hide details
-
p.
489
–490
(2)
The recessed-gate AlGaN/GaN metal-insulator-semiconductor (MIS) FET with a field-modulating plate (FP) has been fabricated. At a reverse bias condition, gate-leakage current is 10−9 A/mm and gate-drain breakdown voltage is over 200 V, which is four times higher than that of a conventional AlGaN/GaN MISFET without an FP. At 2 GHz, a 48 mm-wide recessed MIS-FP-FET demonstrated a CW saturated output power of 141 W (2.9 W/mm), a linear gain of 7.6 dB and a power-added efficiency of 56% with a drain bias of 40 V. A total CW output power of 141 W is the highest ever achieved for any III-V compound-semiconductor MISFETs. - Author(s): A. Endoh ; Y. Yamashita ; K. Hikosaka ; T. Matsui ; S. Hiyamizu ; T. Mimura
- Source: Electronics Letters, Volume 42, Issue 8, p. 490 –492
- DOI: 10.1049/el:20060513
- Type: Article
- + Show details - Hide details
-
p.
490
–492
(3)
Decananometre-T-shaped-Ni/Pt/Au-gate AlGaN/GaN HEMTs on sapphire substrates are fabricated and their DC characteristics measured. The negative shifts of threshold voltages occur below 5–6 of channel aspect ratio Lg/d, where Lg is the gate length and d is the AlGaN barrier layer thickness. This is a similar trend as observed in AlGaAs/GaAs HEMTs. The negative threshold voltage shifts are enhanced with increasing d, which results from the increase of the two-dimensional electron gas thickness.
Behaviour of electrical and optical properties of indium tin oxide transparent electrode after CMP process
CW 140 W recessed-gate AlGaN/GaN MISFET with field-modulating plate
Threshold voltage shifts in decananometre-gate AlGaN/GaN HEMTs
-
- Author(s): E. Jammeh ; M. Fleury ; M. Ghanbari
- Source: Electronics Letters, Volume 42, Issue 8, p. 492 –494
- DOI: 10.1049/el:20060600
- Type: Article
- + Show details - Hide details
-
p.
492
–494
(3)
A congestion-level measure based on packet dispersion rather than packet loss, using a fuzzy rule set rather than an equation-based approach, is proposed. Tests show that non-packet-loss-based control of transcoded video is well behaved across a tight link in the face of characteristic Internet cross-traffic and results in smooth variation of the received video quality. - Author(s): Y. Li ; K.T. Ko ; G.R. Chen
- Source: Electronics Letters, Volume 42, Issue 8, p. 494 –495
- DOI: 10.1049/el:20064279
- Type: Article
- + Show details - Hide details
-
p.
494
–495
(2)
A method is proposed for estimating the regulating time of PI-controlledAQM, which is closely related to the transient response time. It is shown that the regulating time of the PI-controlled AQM is explicitly related to its chosen parameter values and the network condition. Finally, comparisons show that the estimation is sufficiently accurate.
Non-packet-loss-based rate adaptive video over the Internet
Transient behaviour of PI-controlled AQM
-
- Author(s): W. Soluch
- Source: Electronics Letters, Volume 42, Issue 8, p. 495 –497
- DOI: 10.1049/el:20064296
- Type: Article
- + Show details - Hide details
-
p.
495
–497
(3)
Love wave and surface transverse wave are two independent acoustic modes propagating in the area of periodical electrodes on 35°YX90° cut quartz with a SiO2 layer. A synchronous resonator and the scattering matrix method were used for determination of these waves' parameters. For the Love wave mode, at a frequency of about 492 MHz, insertion loss, loaded and unloaded quality factors of about 11 dB, 5500 and 7800, respectively, were obtained. This resonator is promising for applications in sensors.
Love wave synchronous resonator on quartz with SiO2 layer
-
- Author(s): S. Nakata ; K. Saito ; M. Shimada
- Source: Electronics Letters, Volume 42, Issue 8, page: 497 –497
- DOI: 10.1049/el:20060797
- Type: Article
- + Show details - Hide details
-
p.
497
(1)
- Author(s): J. Shibayama ; M. Muraki ; J. Yamauchi ; H. Nakano
- Source: Electronics Letters, Volume 42, Issue 8, page: 497 –497
- DOI: 10.1049/el:20060795
- Type: Article
- + Show details - Hide details
-
p.
497
(1)
- Author(s): C.-D. Chung and W.-L. Win
- Source: Electronics Letters, Volume 42, Issue 8, page: 497 –497
- DOI: 10.1049/el:20060798
- Type: Article
- + Show details - Hide details
-
p.
497
(1)
Erratum for ‘Non-volatile Al2O3 memory using an Al-rich structure as a charge-storing layer’
Erratum for ‘Efficient implicit FDTD algorithm based on locally one-dimensional scheme’
Erratum for ‘Spectrally efficient full-response Q2PSK signals’
Most viewed content for this Journal
Article
content/journals/el
Journal
5
Most cited content for this Journal
-
Extreme multistability in a memristive circuit
- Author(s): Bo-Cheng Bao ; Quan Xu ; Han Bao ; Mo Chen
- Type: Article
-
Absorptive frequency selective surface using parallel LC resonance
- Author(s): Qiang Chen ; Liguo Liu ; Liang Chen ; Jiajun Bai ; Yunqi Fu
- Type: Article
-
Partial spectral search-based DOA estimation method for co-prime linear arrays
- Author(s): Fenggang Sun ; Peng Lan ; Bin Gao
- Type: Article
-
Experimental verification of on-chip CMOS fractional-order capacitor emulators
- Author(s): G. Tsirimokou ; C. Psychalinos ; A.S. Elwakil ; K.N. Salama
- Type: Article
-
54 Gbit/s OOK transmission using single-mode VCSEL up to 2.2 km MMF
- Author(s): G. Stepniak ; A. Lewandowski ; J.R. Kropp ; N.N. Ledentsov ; V.A. Shchukin ; N. Ledentsov Jr. ; G. Schaefer ; M. Agustin ; J.P. Turkiewicz
- Type: Article