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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Modelling Of Polyaniline For Wi-Fi Electromagnetic Interference Shielding, Whamid Al-Shabib, Stefan W. Lachowicz
Modelling Of Polyaniline For Wi-Fi Electromagnetic Interference Shielding, Whamid Al-Shabib, Stefan W. Lachowicz
Research outputs 2013
In this paper COMSOL model is used to model the s-parameters of the electromagnetic shielding of layer/layers of Polyaniline (PAni) for Wi-Fi Electromagnetic Interference (EMI) shielding. PAni has a good future for minimizing the problems with Electromagnetic Shielding (EMS), and will be increasingly be used to provide protection from Electromagnetic Radiation (EMR) and Electromagnetic Interference (EMI). With the increased development in Wi-Fi and telecommunications equipment, a simple model is required to test for transmission losses. In this paper the electromagnetic radiation from antenna, positioned 30cm from PAni shielding device is modelled using COMSOL 4.2. The paper predicts the radiation reduction …
Oscillation Built-In-Self-Test For Adc Linearity Testing In Deep Submicron Cmos Technology, Koay Soon Chan, Nuzrul Fahmi Nordin, Kim Chon Chan, Terk Zyou Lok, Chee Wai Yong, Adam Osseiran
Oscillation Built-In-Self-Test For Adc Linearity Testing In Deep Submicron Cmos Technology, Koay Soon Chan, Nuzrul Fahmi Nordin, Kim Chon Chan, Terk Zyou Lok, Chee Wai Yong, Adam Osseiran
Research outputs 2013
This paper proposes an Oscillation BIST (OBIST) that is meant to test ADCs fabricated in sub 100nm processes. The design is intended to be capable of testing a 10-bit ADC that was designed in 40nm CMOS. The design scheme presents a simple analog stimulus generator that was designed in 40nm CMOS together with schematic based simulation results. There is also a description of a calibration circuit and a highlevel implementation of a BIST control system to run the BIST and to calculate static parameters such as Differential Non-linearity (DNL) and Integral Non-linearity (INL). Simulation results for the analog stimulus generator …
Free-Space Optics For High Speed Reconfigurable Card-To-Card Optical Interconnects, Ke Wang, Ampalavanpillai Nirmalathas, Christina Lim, Efstratios Skafidas, Kamal Alameh
Free-Space Optics For High Speed Reconfigurable Card-To-Card Optical Interconnects, Ke Wang, Ampalavanpillai Nirmalathas, Christina Lim, Efstratios Skafidas, Kamal Alameh
Research outputs 2013
High-speed card-to-card optical interconnects are highly demanded in high-performance computing and data centers. Compared with other solutions, free-space optical interconnects have the capability of providing both reconfigurability and flexibility. In this paper we propose and experimentally demonstrate a free-space based reconfigurable optical interconnect architecture and it is capable of connecting cards located both inside the same rack as well as in different racks. Results show that 3xiO Gb/s data transmission is achieved with a worst-case receiver sensitivity better than -9.38 dBm.
Unidirectional Coupling Of Surface Plasmons With Ultra-Broadband And Wide-Angle Efficiency: Potential Applications In Sensing, Kun Li, Feng Xiao, Fan Lu, Kamal Alameh, Anshi Xu
Unidirectional Coupling Of Surface Plasmons With Ultra-Broadband And Wide-Angle Efficiency: Potential Applications In Sensing, Kun Li, Feng Xiao, Fan Lu, Kamal Alameh, Anshi Xu
Research outputs 2013
A cascaded-grating coupling scheme for unidirectionally coupling and launching surface plasmons from free-space light with ultra-broadband and wide-angle efficiency is proposed and theoretically investigated, and the potential applications in sensing are discussed. The cascaded sub-gratings of different periods couple the incident light over a relatively wide wavelength and angular range into surface plasmon polaritons (SPPs). After traveling a short distance, the SPPs interact with the sensed medium, and then are coupled back into freely propagating light through the nanoslit in the metal film. By observing the changes of SPP-mediated light coupled out through the slit, broadband sensing is achieved. A …
Optical Fiber Bragg Grating Based Intrusion Detection Systems For Homeland Security, Gary Allwood, Steven Hinckley, Graham Wild
Optical Fiber Bragg Grating Based Intrusion Detection Systems For Homeland Security, Gary Allwood, Steven Hinckley, Graham Wild
Research outputs 2013
This paper describes the use of optical Fiber Bragg grating (FBG) sensors for use in various intrusion detection systems for homeland security. We show that a FBG sensor can be used effectively as an embedded in-ground acoustic sensor, sensitive enough to detect the acoustic emissions associated with walking on a concrete surface. Also, the FBG can be used as an in-ground pressure switch for intrusion detection through temporary flooring materials, such as tiles and wooden laminate. In addition, we verify the use of FBGs as in-fence perimeter breach detectors. Finally, we show how an FBG can be used as a …
High Sensitivity Optically Pumped Quantum Magnetometer, Valentina Tiporlini, Kamal Alameh
High Sensitivity Optically Pumped Quantum Magnetometer, Valentina Tiporlini, Kamal Alameh
Research outputs 2013
Quantum magnetometers based on optical pumping can achieve sensitivity as high as what SQUID-based devices can attain. In this paper, we discuss the principle of operation and the optimal design of an optically pumped quantum magnetometer. The ultimate intrinsic sensitivity is calculated showing that optimal performance of the magnetometer is attained with an optical pump power of 20 W and an operation temperature of 48°C. Results show that the ultimate intrinsic sensitivity of the quantum magnetometer that can be achieved is 327 fT/Hz1/2 over a bandwidth of 26 Hz and that this sensitivity drops to 130 pT/Hz1/2 in the presence …