# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 44
• ### In brief

Publication Year: 2011, Page(s): 942
| |PDF (178 KB)
• ### Interview

Publication Year: 2011, Page(s): 942
| |PDF (103 KB)

Dr Oscar Luc??a from the University of Zaragoza talks about the research behind the Letter Configurable snubber network for efficiency optimisation of resonant converters applied to multi-load induction heating?? on page 989. View full abstract»

• ### Inside view

Publication Year: 2011, Page(s):943 - 944
| |PDF (702 KB)

As research engineers, our main job is to anticipate the needs of optical networks and fi nd the adequate response to them. Among these needs, there is, of course, the increase of total transmitted data. However, fi bre transmission becomes more and more challenging as bit rate increases because the tolerance to optical noise and propagation effects is reduced which limits the maximum transmission... View full abstract»

• ### A calming influence

Publication Year: 2011, Page(s): 944
| |PDF (90 KB)

A simple passive electrical circuit that is able to suppress Q-switching instabilities in mode-locked semiconductor quantum dot lasers has been demonstrated. By connecting frequency-selective electrical components to the absorber section of a monolithic two-section tapered laser, a team at the Technical University of Darmstadt in Germany were able to eliminate the Q-switching instabi... View full abstract»

• ### Compact dual-band circularly-polarised cavity-backed slot antenna

Publication Year: 2011, Page(s):947 - 948
Cited by:  Papers (7)
| |PDF (346 KB)

A compact dual-band and dual circular-polarisation cavity-backed slot antenna using the inverted configuration is presented. The proposed antenna consists of two subarrays providing left-hand circular-polarisation for the 12 GHz band and right-hand circular-polarisation for the 14 GHz band, respectively. The dual-band and dual-polarisation antenna is fed by a microstrip network printed on the top ... View full abstract»

• ### Optically controlled reconfigurable antenna for cognitive radio applications

Publication Year: 2011, Page(s):948 - 950
Cited by:  Papers (19)
| |PDF (364 KB)

A new optically controlled reconfigurable antenna for cognitive radio is presented. The antenna can operate at an ultra-wideband and three narrow bands by controlling four photoconductive switches. The bandwidth of the ultra-wideband is 2.65 to 10.3 GHz. The bandwidths of three narrow bands are 7.10 to 8.01 GHZ, 3.55 to 5.18 GHz, and 5.12 to 6.59 GHz, respectively. View full abstract»

• ### Compact dual-band-notched UWB planar monopole antenna with modified SRR

Publication Year: 2011, Page(s):950 - 951
Cited by:  Papers (17)
| |PDF (223 KB)

To prevent interference problems due to existing nearby communication systems within an ultra-wideband (UWB) operating frequency, a compact dual-band-notched UWB antenna is presented. This antenna consists of a trapezoidal ground plane with a rectangle slot, a Y-shaped monopole used as the radiator, together with a modified complementary co-directional splitering resonator (SRR) etched on the radi... View full abstract»

• ### Dual-polarised patch antenna with low cross-polarisation and high isolation for WiMAX applications

Publication Year: 2011, Page(s):952 - 953
Cited by:  Papers (5)
| |PDF (496 KB)

A coax-feed dual-polarised patch antenna with low cross-polarisation and high port isolation is presented. The proposed antenna contains two pairs of narrow slots along the diagonals and two pairs of T-shaped slots along the centrelines, which change the path of the current and keep the cross-polarisation under -38-dB. By introducing two short pins, the isolation between the two ports remains more... View full abstract»

• ### Reconfigurable dipole-chassis antennas for small terminal MIMO applications

Publication Year: 2011, Page(s):953 - 955
Cited by:  Papers (8)
| |PDF (235 KB)

Presented is a wideband reconfigurable MIMO antenna, which is the combination of a reconfigurable balanced dipole and a two-port chassis antenna. Measurements show that the prototype antenna can tune the operating frequency from 646 to 848 MHz and 1648 to 2074 MHz with instantaneous bandwidths of 14-93 MHz. The proposed MIMO antenna provides low correlation and high efficiency within these operati... View full abstract»

• ### CMOS clock buffer with reduced supply noise sensitivity

Publication Year: 2011, Page(s):955 - 956
| |PDF (169 KB)

A CMOS clock buffer that minimises the period jitter due to supply noise is presented. The proposed buffer features a highpass noise cancellation circuit which is able to halve the output period jitter compared to a standard CMOS buffer. By avoiding large decoupling capacitors to filter out the supply noise, this technique enables a more efficient use of the active area when compared to traditiona... View full abstract»

• ### Compact and low-power continuous-time derivative circuit

Publication Year: 2011, Page(s):956 - 957
Cited by:  Papers (3)
| |PDF (139 KB)

A new circuit to compute a continuous-time derivative is introduced. Comprising only one capacitor and six to eight transistors, this derivative circuit occupies very little real estate and consumes limited power, making it particularly well suited to low-power and array applications such as imager systems and sub-banded audio-processing applications. A description of the operation of this circuit... View full abstract»

• ### Wideband balanced combline filter with extended common-mode suppression

Publication Year: 2011, Page(s):957 - 959
| |PDF (186 KB)

A wideband differential-mode combline filter with a tapped-line input is presented. High suppression of the common-mode and a small size are two important features of the proposed filter. The filter combines two conventional combline filters connected together through discrete capacitors. The realised sixth-order balanced combline filter has a 3 dB bandwidth of 74% from 0.88 to 1.9 GHz. The common... View full abstract»

• ### Modified Smith predictor and controller for time delay processes

Publication Year: 2011, Page(s):959 - 961
Cited by:  Papers (5)
| |PDF (97 KB)

A modified Smith predictor control scheme is proposed for controlling stable, integrating and unstable processes with time delay. The two-degrees-of-freedom control structure along with simple tuning rules result in improved servo and regulatory performances by independently tuning a single control parameter. A convenient property of the proposed control scheme is that it decouples the setpoint re... View full abstract»

• ### Correlation of robust Haar-like feature

Publication Year: 2011, Page(s):961 - 962
Cited by:  Papers (1)
| |PDF (65 KB)

Presented is a new template matching method using correlation based on robust Haar-like features. The main result of this reported work is the robust computation of Haar-like features to limit the influence of outliers and any effect that may cause a deviation from a perfect match. Simulation results show that the correlation of robust Haar-like features outperforms the correlation of Haar-like fe... View full abstract»

• ### No-reference blur index using blur comparisons

Publication Year: 2011, Page(s):962 - 963
Cited by:  Papers (8)
| |PDF (103 KB)

Presented is a new no-reference blur index for still images that is based on the observation that it can be difficult to perceive between versions of an image blurred to different degrees. A re-blurred` image is produced by intentionally blurring the test image. Local sample statistics are computed in the vicinity of detected edges of the original and re-blurred images, respectively. These are di... View full abstract»

• ### Balanced parallelised frugal IPv6 lookup algorithm

Publication Year: 2011, Page(s):963 - 965
Cited by:  Papers (2)
| |PDF (197 KB)

Transition to IPv6 is inevitable, since the last IPv4 addresses have been recently allocated. Existing IPv6 lookup algorithms are not scalable as the IPv6 addresses are four times longer than the IPv4 addresses. Proposed is a novel IPv6 lookup algorithm which is far more scalable than previous solutions. View full abstract»

• ### CPF-HAF estimator of polynomial-phase signals

Publication Year: 2011, Page(s):965 - 966
Cited by:  Papers (4)
| |PDF (127 KB)

A simple and effective modification of the high-order ambiguity function (HAF) is introduced. The number of phase differentiations is decreased to two with respect to the HAF. The obtained signal has a cubic phase, the parameters of which can be estimated using the cubic phase function (CPF) in the final stage. The SNR threshold of the proposed modification is reduced for 9 dB with respect to the ... View full abstract»

• ### Low complexity bit metric generation for PAM signals based on nonlinear function

Publication Year: 2011, Page(s):966 - 967
Cited by:  Papers (4)
| |PDF (180 KB)

The bit metric is used for soft-decision decoding in bit-interleaved coded modulation (BICM) systems. The complexity of bit metric generation increases rapidly for high-order modulation. Proposed is a nonlinear function and a recursive formula to generate the bit metric for the pulse amplitude modulation (PAM) signal with any modulation order. This method can reduce the computational complexity gr... View full abstract»

• ### Ensemble of predictors and laser induced breakdown spectroscopy for certifying coffee

Publication Year: 2011, Page(s):967 - 969
Cited by:  Papers (1)
| |PDF (94 KB)

The commercial demand and the economic value of roasted and ground coffee (RGC) are intrinsically related to its quality. Brazilian RGC has been certified for quality based on a score assigned by expert tasters. However, intrinsic costs and the lack of fast techniques make large-scale analysis prohibitive. Laser induced breakdown spectroscopy (LIBS) is a promising technique for RGCs, however it de... View full abstract»

• ### Pico-strain measurement using optimised fibre Fabry-Perot sensor system with reference wavelength

Publication Year: 2011, Page(s):969 - 970
| |PDF (175 KB)

The optimisation of noise properties is demonstrated in an interferometric fibre Bragg grating defined Fabry-Perot sensor system. The signal-to-noise ratio is maximised by matching the spectra of the two gratings and the path length differences of the two tandem interferometers. The environmental effects on the interrogation interferometer are monitored with a reference wavelength. A phase resolut... View full abstract»

• ### 10 Gbit/s burst-mode limiting amplifier with switched time constants for fast settling and large CID tolerance

Publication Year: 2011, Page(s):970 - 972
Cited by:  Papers (1)
| |PDF (267 KB)

A 10 Gbit/s DC-coupled burst-mode limiting amplifier (BM-LA) with two-level integration time constants for fast/slow feedback offset cancellation respectively during preamble/payload of the incoming bursts is presented. A 10 Gbit/s APD-based burst-mode receiver (BM-Rx) using this feedback type BM-LA achieves a Rx sensitivity of -30.6 dBm under a loud/soft ratio of 24.6 dB at a bit error rate of 10... View full abstract»

• ### Free-space optical transmission with orbital angular momentum division multiplexing

Publication Year: 2011, Page(s):972 - 973
Cited by:  Papers (5)
| |PDF (184 KB)

The experimental demonstration of a free-space optical transmission system with orbital angular momentum (OAM) division multiplexing is reported. Two beams have been multiplexed with different values of the azimuthal index l, and hence carrying different OAM, at a wavelength of 1550 nm. The first beam (l = 0) is nearly Gaussian and it features an OAM equal to zero. The second beam (<... View full abstract»

• ### Long-haul WDM transmission of 448 Gbit/s polarisation-division multiplexed 16-ary quadrature amplitude modulation using coherent detection

Publication Year: 2011, Page(s):973 - 975
Cited by:  Papers (7)  |  Patents (1)
| |PDF (199 KB)

The transmission of a PDM-QAM16 signal at 400 Gbit/s over 1200 km in a WDM environment is demonstrated. The WDM link carrying 40 PDM-QAM16 channels modulated at the same bit rate incorporates ultra-low-loss, large effective area fibre and erbium-doped fibre amplifiers. View full abstract»

• ### Transmission of 40 x 200 Gbit/s polarisation division multiplexed quadrature phase shift keyed channels over 6600 km

Publication Year: 2011, Page(s):975 - 976
Cited by:  Papers (1)
| |PDF (318 KB)

The first transoceanic WDM transmission at 200 Gbit/s, using PDM-QPSK, coherent detection, ultra-low-loss large effective area fibre and erbium-doped fibre amplifiers is demonstrated. View full abstract»

• ### Hybrid microfabrication and 5-DOF levitation of micromachined electrostatically suspended gyroscope

Publication Year: 2011, Page(s):976 - 978
| |PDF (297 KB)

A newly designed electrostatically suspended rotational microgyroscope, with optimised electrode structures and interconnections, is presented. Hybrid MEMS manufacturing techniques, including surface micromachining fabrication of thin film electrodes and interconnections, integration fabrication of thick nickel structures using UV-LIGA, DRIE of silicon rotor, microassembly and solder bonding, are ... View full abstract»

## 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