Browsing by Author "Mathewson, Alan"

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Browsing by Author "Mathewson, Alan"

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  • Chang, Tongwei; Mathewson, Alan; Kennedy, Michael Peter; Greer, James C. (IEEE, 2004-11)
    A modification to heterodimensional field effect transistors (HDFET) is introduced and demonstrated to provide novel switching capabilities. The modification consists of introducing a split drain into the HDFET structure ...
  • Jesudoss, Pio; Mathewson, Alan; Wright, William M. D.; O'Flynn, Brendan; Stam, Frank (IEEE, 2008)
    The objective of this paper is to investigate the effect of the pad size ratio between the chip and board end of a solder joint on the shape of that solder joint in combination with the solder volume available. The shape ...
  • Gaffney, Mark; O'Flynn, Brendan; Mathewson, Alan; Buckley, John; Barton, John; Angove, Philip; Vcelak, Jan; Ó Conaire, Ciarán; Healy, Graham; Moran, Kieran; O'Connor, Noel E.; Coyle, Shirley; Kelly, Philip; Caulfield, Brian; Conroy, Luke ([IEEE], 2009-09-24)
    A wearable WIMU (Wireless Inertial Measurement Unit) [1] system for sports applications based on Tyndall's 25mm mote technology [2] has been developed to identify tennis performance determining factors, giving coaches & ...
  • Quinlan, Finbarr; Anastasova, Salzitsa; Morris, Virginia; Radu, Aleksandar; O'Flynn, Brendan; Mathewson, Alan ([IEEE], 2009-09-24)
    The goal of this work is to fabricate robust, highly-miniaturised, wireless sensor modules that incorporates ion-selective electrodes (ISEs). pH is one of the main parameters in assessment of the quality of our environment ...
  • Zheng, Liqiang; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (Editura Universitatii de Nord, 2010)
    Wireless sensor network (WSN) node, typically equipped with a radio transceiver, a small microcontroller and a battery, is different from traditional embedded systems because of its requirement of random deployment, small ...
  • Hilt, Thierry; Boutry, Herve; Franiatte, Remi; Rothan, Frederic; Sillon, Nicolas; Stam, Frank; Mathewson, Alan; Wang, Ningning; Ó Mathúna, S. Cian; Rodgers, Kenneth (IEEE, 2010-06-04)
    This paper reports on the design and the manufacturing of an integrated DCDC converter, which respects the specificity of sensor node network: compactness, high efficiency in acquisition and transmission modes, and ...
  • Zheng, Liqiang; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (© (2011) Trans Tech Publications, Switzerland, 2010-08)
    In this paper, the effect of the substrate on wireless sensor network (WSN) node s RF performance is studied experimentally by using different substrate materials with different thickness. A six-layer FR4 substrate PCB WSN ...
  • Zheng, Liqiang; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (2010-08)
    A comparison study was carried out between a wireless sensor node with a bare die flip-chip mounted and its reference board with a BGA packaged transceiver chip. The main focus is the return loss (S parameter S11) at the ...
  • Zheng, Liqiang; Rodgers, Kenneth; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (IEEE, 2010-09-16)
    The flip-chip technology is a high chip density solution to meet the demand for very large scale integration design. For wireless sensor node or some similar RF applications, due to the growing requirements for the wearable ...
  • Zheng, Liqiang; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (IEEE, 2010-12)
    In this paper, the embedded capacitance material (ECM) is fabricated between the power and ground layers of the wireless sensor nodes, forming an integrated capacitance to replace the large amount of decoupling capacitors ...
  • Zheng, Liqiang; Mathewson, Alan; O'Flynn, Brendan; Hayes, Michael; Ó Mathúna, S. Cian (Trans Tech Publications, 2011-06)
    Return loss of wireless sensor network (WSN) node indicates the impedance matching between signal ports of the RF chip and the antenna, and thus shows the transmission efficiency in the signal path. All circuit components, ...