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Electronics Letters

Issue 2 • Date January 16 2014

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Displaying Results 1 - 25 of 45
  • In brief

    Publication Year: 2014 , Page(s): 54
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  • Interview

    Publication Year: 2014 , Page(s): 54
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (85 KB)  

    Prof. Dieter Bimberg of Technische Universit??t Berlin in Germany talks about the work behind the Letter 'Energy-efficient and temperature-stable oxide-confined 980-nm VCSELs operating error-free at 38 Gb/s at 85 °C' on page 103. View full abstract»

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  • Through the phases

    Publication Year: 2014 , Page(s): 55
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (328 KB)  

    A team from the University of Connecticut have presented a new approach to model PCM that efficiently deals with mixed phase states caused by incomplete write operations. View full abstract»

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  • Inside view

    Publication Year: 2014 , Page(s): 56
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (644 KB)  

    The paper briefly discusses how frequency selective surfaces relate to polarisers, and issues involving their design. View full abstract»

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  • Asymmetrical wideband zeroth-order resonant antenna

    Publication Year: 2014 , Page(s): 59 - 60
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (364 KB)  

    A new asymmetrical zeroth-order resonant antenna with improved efficiency and widened impedance bandwidth is proposed. It comprises a rectangular patch, two shorted stubs and a coplanar waveguide feed to have composite right/left-handed features and an easy fabrication process. The asymmetry helps to combine three resonance frequencies and extends the bandwidth up to 61.6%. The efficiency of the p... View full abstract»

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  • Babinet's principle applied to ultra-wideband antennas for high isolation

    Publication Year: 2014 , Page(s): 60 - 62
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (594 KB)  

    The application of Babinet's principle to the ultra-wideband (UWB) differential planar printed antenna is presented. This electromagnetic technique is applied to a classical monopole UWB antenna, and can also be applied to most types of printed antennas. It permits grouping on the same substrate of two antennas close to each other, operating in the same frequency band and with high isolation. In t... View full abstract»

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  • Compact CPW fed electrically small antenna for WLAN application

    Publication Year: 2014 , Page(s): 62 - 64
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (442 KB)  

    A compact coplanar waveguide (CPW) fed electrically small antenna suitable for 2.4 GHz WLAN applications is presented. The resonance of the structure is achieved by implanting a chip inductor in between the centre conductor of an open-ended CPW transmission line and a short metal strip. The total electrical size of the fabricated antenna is 0.08λ0 × 0.0479... View full abstract»

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  • Compact frequency selective surface for polarisation transform

    Publication Year: 2014 , Page(s): 64 - 65
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (212 KB)  

    The polarisation transforming properties of a compact frequency selective surface (FSS) are reported. Although known designs made with meander lines employ several cascaded surfaces with many interconnects, the design methodology presented uses a single planar surface of very closely arrayed metallic meander lines impedance loaded with rectangular metal patches. A simulated axial ratio of ≤... View full abstract»

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  • Theoretical and experimental analysis of spatial division using antenna directivities in short-range MIMO transmission

    Publication Year: 2014 , Page(s): 65 - 67
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (298 KB)  

    A simple method is proposed for achieving short-range multiple-input multiple-output (MIMO) transmission without complicated signal processing. This is achieved by a spatial division that cancels interference between signal streams by using π-phase-shifted antenna directivities in high speed parallel transmission systems at 60 GHz. The method achieves spatial division transmission wi... View full abstract»

    Open Access
  • Triple band-notched UWB antenna based on SIR-DGS and fork-shaped stubs

    Publication Year: 2014 , Page(s): 67 - 69
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (725 KB)  

    A compact CPW-fed triple band-notched antenna for ultra-wide bandwidth (UWB) application is presented. By introducing an stepped impedance resonator-defected ground structure (SIR-DGS) and fork-shaped stubs, three sharp notches are achieved at frequencies of 3.5, 5.68 and 7.48 GHz. The proposed antenna working from 2.8 to 11.3 GHz with a voltage standing wave ratio of <;2 is demonstrated, excep... View full abstract»

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  • 0.5 V inverter-based ultra-low-power, low-noise VGA for medical ultrasound probes

    Publication Year: 2014 , Page(s): 69 - 71
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (424 KB)  

    An inverter-based ultra-low-power, low-noise, single-ended to differential continuous-time variable gain amplifier is presented for 2-6 MHz second harmonic cardiac imaging ultrasound probes in a 65 nm CMOS technology. The proposed variable gain amplifier (VGA) consists of three equal inverters and resistor arrays which form a feedback loop. To improve both the power and noise performances, the inv... View full abstract»

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  • Effect of memory on BER in molecular communication

    Publication Year: 2014 , Page(s): 71 - 72
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (243 KB)  

    In molecular communication, some molecules stay longer in the medium and impinge on later transmissions. The bit error rate (BER) of a diffusion-based molecular communication channel which has memory is analysed. The effect of four previous symbols on the current symbol is considered. Human insulin hormone is used as the messenger molecule and the first passage time of a molecule has been defined ... View full abstract»

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  • Hiding rollback latency in log-based eager hardware transactional memory

    Publication Year: 2014 , Page(s): 72 - 74
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (139 KB)  

    The use of a rollback buffer (RB) for hiding the rollback latency in log-based eager hardware transactional memory is proposed. The RB allows a transaction to abort without performing rollback, but still makes the transaction's old values immediately available. In effect, the rollback latency almost disappears. When running the Stanford transactional applications for multi-processing benchmark on ... View full abstract»

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  • Interpreting area of pinched memristor hysteresis loop

    Publication Year: 2014 , Page(s): 74 - 75
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (111 KB)  

    It is shown that the area of the pinched hysteresis loop of the current-controlled ideal memristor represents the quantity `content', which was introduced into the theory of nonlinear systems by Millar in 1951. Two parts of the content are identified which correspond to distinct parts of the area below the v-i characteristic of the memristor: one is related to the power conditions and the o... View full abstract»

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  • Using interaction between two nonlinear systems to improve IIP3 in active mixers

    Publication Year: 2014 , Page(s): 76 - 77
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (286 KB)  

    A new linearisation technique for active mixers is introduced to enhance the third-order input intercept point (IIP3). This technique is based on the cancellation of the third-order Volterra kernel in the output current of the transconductance stage by using the interaction between two nonlinear systems. In this scheme, a nonlinear circuit is employed prior to the conventional mixer to improve the... View full abstract»

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  • Constrained kernel regression for pose estimation

    Publication Year: 2014 , Page(s): 77 - 79
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (108 KB)  

    A constrained kernel regression model is proposed to solve the problem of one-dimensional (1D) pose estimation. Unlike the traditional kernel regression model, a circular constraint is applied to the output of the regression function, i.e. using 2D coordinates on a unit circle as output instead of 1D pose angles from 0 to 360°. The experimental results show that with this constraint, the pe... View full abstract»

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  • Full-reference image quality assessment using statistical local correlation

    Publication Year: 2014 , Page(s): 79 - 81
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (179 KB)  

    A novel full-reference image quality assessment metric employing statistical local correlation as an indicator for quality quantification is presented. The local correlation is extracted in a wavelet domain and is pooled into an objective quality score. Simulation and testing results demonstrate that the proposed method not only outperforms the other methods in terms of high accuracy of image qual... View full abstract»

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  • Highly efficient supersonic small infrared target detection using temporal contrast filter

    Publication Year: 2014 , Page(s): 81 - 83
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (490 KB)  

    A novel temporal contrast filter (TCF)-based method was developed to detect supersonic small infrared targets. The proposed hysteresis threshold-based detection followed by the TCF can enhance the accuracy of the target position, the robustness to background clutter and the velocity range of moving targets compared with the conventional temporal variance filter-based method. View full abstract»

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  • Regularised reweighted BPDN for compressed video sensing

    Publication Year: 2014 , Page(s): 83 - 84
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (229 KB)  

    In traditional compressed sensing methods, imposing sparsity alone usually does not produce the most visually pleasing reconstructed videos. Thus, by leveraging more prior information extracted from the temporal redundancy, a regularised reweighted basis pursuit denoising method with estimated support and signal value is proposed for a compressively sampled video. Moreover, an effective alternatin... View full abstract»

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  • Using composite low rank and sparse graph for label propagation

    Publication Year: 2014 , Page(s): 84 - 86
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (153 KB)  

    Based on the low rank representation (LRR) and the sparse representation (SR), a composite LRR with SR graph LRRSR for semi-supervised label propagation is proposed. The LRRSR aims to capture both the global structure of the data by a low rank constraint and the local structure of the data by a sparse constraint simultaneously. A composite framework is applied to fuse the two graphs. Then, a label... View full abstract»

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  • Quasi-chipless wireless temperature sensor based on harmonic radar

    Publication Year: 2014 , Page(s): 86 - 88
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (208 KB)  

    A novel passive wireless temperature sensor is presented, which aims at operating in harsh environments. For this purpose, the tag is designed quasi-chipless and it uses a harmonic radar sensing principle: it combines the backscattering on the first harmonic of the transmitted frequency with frequency-position encoding of the measured value. The harmonic radar approach brings significant advantage... View full abstract»

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  • X-band differential bandpass filter with high common-mode suppression using substrate integrated waveguide cavity

    Publication Year: 2014 , Page(s): 88 - 89
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (387 KB)  

    A novel X-band differential bandpass filter based on substrate integrated waveguide is proposed. By making an aperture etched in the middle common ground of the vertically stacked cavities, the common-mode (CM) signals can be highly suppressed. Compared with conventional structures, the proposed design possesses a relatively simple and effective measure for the rejection of the CM signals. Based o... View full abstract»

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  • Compact UWB bandpass filter with triple notched bands using parallel U-shaped defected microstrip structure

    Publication Year: 2014 , Page(s): 89 - 91
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (305 KB)  

    A novel compact ultra-wideband (UWB) bandpass filter (BPF) with triple sharply notched bands and good selectivity is proposed using a parallel U-shaped defected microstrip structure (UDMS). The initial UWB BPF comprises interdigital coupled lines and an E-shaped multiple-mode resonator to achieve two transmission zeros on both sides of the passband, thus improving skirt selectivity. Then, three pa... View full abstract»

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  • Design of dual-band phase offset line with arbitrary phase shift at two operational frequencies

    Publication Year: 2014 , Page(s): 91 - 93
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (358 KB)  

    A simple and successful design for an arbitrary phase shift at two operational frequencies by using a T-section with only a single dual-band stub-loaded line is presented, and the design equations are derived analytically. For verification, a proposed dual-band phase offset line is fabricated and measured at 1618.25 and 2491.75 MHz of the `COMPASS'. The results show that there is good agreement be... View full abstract»

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  • Electromagnetic and thermal study of low loss and compact air dielectric stripline in X-band

    Publication Year: 2014 , Page(s): 93 - 95
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (727 KB)  

    The concept of a microwave transmission line suspended in air, and a methodology for electromagnetic and thermal optimisation of these structures in X-band (8-12 GHz) are reported. A reliable printed circuit process allows us to obtain compact, low loss and reproducible stripline structures. The measured stripline circuits demonstrate losses from only 4.2 to 5.2 dB/m at 9 GHz. The use of periodic ... 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