Alistair Duffy

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The development and testing of automotive (sub)systems, particularly for Electromagnetic Compatibility (EMC) usually requires expensive test facilities. This paper describes the use of electromagnetic simulation to demonstrate the level of confidence that can be placed in measurements taken in more general laboratories, thus giving an estimate of the(More)
Partial discharge is the phenomenon where high field strength causes charge build up and subsequent discharge within the body of the dielectric a power transmission line. Such a discharge is likely to occur at sites of imperfections, gas bubbles and other inhomogeneities. These can be the cause of serious deterioration in the dielectric which can lead to(More)
Broadcasting is used in on-demand routing protocols to discover routes in Mobile Ad-hoc Networks (MANETs). On-demand routing protocols, such as AODV (Ad-hoc On-demand Distance Vector) routing, commonly employ pure flooding based broadcasting. However, pure flooding generates excessively redundant routing traffic that may lead to broadcast storm problem(More)
We present a technique for automated identification of the minimum acceptable mesh coarseness in electromagnetic (EM)-simulation models. Our approach is based on the projected evolution of feature selective validation (FSV) Global Difference Measure. It can be used to determine required EM model discretization levels for variable-fidelity EM-based(More)
A 3D electromagnetic time domain model of a particle accelerator cavity was generated for the measurements of beam position using a patch antenna and (for comparison) a pickup by applying a signal at 3GHz. The variations in position from the central axis were modelled using CST Microwave Studio. The results demonstrated that the model can be applied to(More)
In this paper, the Transmission Line Matrix (TLM) method is used to study the electro-thermal performance degradation in RF LDMOS (Radio Frequency - Laterally Diffused Metal Oxide Semiconductor) transistors, through Thermal Cycling Test (TCT), as the temperature is a crucial parameter in RF devices. A hybrid approach is presented, which combines the(More)
This paper examines the return loss predictions of category 8 cable using pseudorandom impedance generation over several cascaded scattering parameter matrices at 1cm length interval. The research applied the 40GBASE-T reference for category 8 cable to simulate the return loss using pseudo-randomly generated impedances in multiple cascaded scattering(More)