Abstract-In this paper, a circular slot antenna fed by an offset microstrip-fed line is proposed. The antenna exhibits dual-band characteristics. The two operating frequency bands are: 1.83-2.73 GHz and 5.36-7.63 GHz, which are of impedance bandwidth 39.5% and 34.9% respectively. The bands are suitable for PCS, UMTS, IMT-2000, ISM, Bluetooth, RFID and WLAN applications. A parametric study has been carried out by varying the location of the feedline to investigate its effect on the resonant frequency. Impedance, radiation and gain characteristics of the proposed antenna are also presented and discussed.

No abstract

PurposeThis paper presents an overview of a lifelong learning scheme. It outlines the design of the scheme that was initially targeted for electrical and electronic engineering students and later students across the faculty of engineering in the University of Nottingham Malaysia (UNM). The scheme named “Students’ Continuing Personal Development (S-CPD)” is developed to improve student participation in extra-curricular activities and at the same time, to create awareness among students of the importance of lifelong learning and to facilitate the development of such skills.Design/methodology/approachThe scheme involves creating and developing more than 30 categories of activities together with a well-structured information technology infrastructure. Various strategies, such as offering awards, are applied to promote student engagement. In 2015 the pilot scheme was rolled out in the Department of Electrical and Electronic Engineering University of Nottingham Malaysia Campus and adopted by all departments in the faculty of engineering in the subsequent year.FindingsS-CPD scheme is aligned to the importance institutions of engineers in the world places on continuing professional development and also to the importance industry and employer places on transferable skills. The scheme provides students with a structured way to plan, participate and record their participation in extra-curricular activities that is relevant to their future careers as engineers in a holistic way. S-CPD scheme not only provides a good platform for students to hone particular “soft” skills and they are also aware of the importance and engaging in lifelong learning to make the most out of their university and also life experience.Research limitations/implicationsThis research could lead to many other studies including the factors that affect students' engagement in extra-curricular activities, short-term and long-term impacts of S-CPD scheme, and also involve psychology research such as psychological factors influencing students' engagement in the scheme.Practical implicationsThis scheme could be repeated in worldwide university programmes.Originality/valueThe S-CPD scheme can be viewed as having a two-pronged growth strategy. The first is to engage students in extra-curricular activities that enhance and improve their learning and personal experiences. The second prong of the growth strategy is to inculcate the growth mindset for lifelong learning, hence adapting well when their profession involves fulfilling CPD requirements.

This paper reports the performance characteristics of two antennas fabricated on two different types of substrates: polyester and cotton. Two different types of conductive textile materials are used in this work, which are Pure Copper Polyester Taffeta Fabric and Shieldit Super. The performance characteristics include reflection coefficient, radiation pattern and current distribution are examined. The impedance and radiation characteristics of the proposed antennas, as studied by both simulation and experiment, are satisfactory.

<p>A recuperating converter is highly demanded in traction power substation to deliver the braking energy generated by a traction vehicle. Conventional voltage source inverter had been implemented in the traction power station. However, large ac line filters must be installed to improve the quality of ac voltages and currents. This paper proposes to install a nine-level Modular Multilevel Converter (MMC) as a recuperating converter. The main aim is to eliminate the need of ac line filters while producing good quality of ac voltage and current waveforms. The MMC is designed and modelled using MATLAB/Simulink Simulation tool. A centralized control of balancing all the sub-module capacitor voltage level is proposed with Third Harmonic Voltage Injection Level Shifted Pulse Width Modulation (THVI-LSPWM) technique. The simulation results prove that with the application of MMC, good quality of ac voltages and currents are being produced. The Total Harmonic Distortion indexes are found less than 3.5 % without using any ac line filters in the system. In addition, the classic DC link capacitance has also being eliminated. </p>