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July 2017

IEEE AP Distinguished Lecture – Many names, many advantages – Are resonant cavity antennas the killer planar space-saving approach to get 15-25 dBi gain?

July 27 @ 4:10 pm - 5:00 pm
S112, Engineering South,

Abstract No other antenna concept has more names. At present these antennas are known as Fabry-Perot cavity resonator antennas, Partial Reflector Surface (PRS) based antennas, Electromagnetic Band Gap (EBG) Resonator antennas (ERAs) and Two-Dimensional Leaky-Wave Antennas, and more names are forthcoming. Yet they all have more or less the same configuration consisting of a resonant cavity, formed between a partially reflecting superstructure and a fully reflecting (ground) plane. The resonant cavity is excited by a small feed antenna. Hence, they…

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August 2017

Wide Speed Range Sensorless Operation of Brushless Permanent-Magnet Motor Using Flux Linkage Increment

August 3 @ 4:10 pm - 4:35 pm
S112, Engineering South,

Abstract: Brushless permanent-magnet (PM) machines offer high efficiency, high-power density, and low maintenance. However, they require the use of an electronic drive to synchronise the current waveforms to the rotor position. Typically, this is achieved through use of external position sensors mounted to the motor shaft. To reduce costs and increase reliability, it is desirable to eliminate these external sensors. Existing back-electromotive force (EMF) and flux linkage-based indirect rotor position detection methods have limitations, specifically poor position accuracy and inability…

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Xin Yuan (Vernon) – A Cognitive Approach for Reproducing the Homing Behaviour of Honey Bees

August 3 @ 4:35 pm - 5:00 pm
S112, Engineering South,

Abstract: We describe the implementation if an agent-based controller for an autonomous robot with cognitive abilities that reproduce homing capability in the foraging behaviour of the honeybee.  The agent is based on a symbolic representation of data and information and is written in a language designed to describe fine-grained large scale parallelism, the Street language. The objective of this approach is to enable the direct translation of agents written in Street into embedded hardware, to achieve compact, power efficient, autonomous…

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IEEE MTT/AP – Milica Popović – Development of a Wearable, Low-Power RF Breast Cancer Detector

August 10 @ 4:10 pm - 5:00 pm
S112, Engineering South,

Abstract Breast cancer is one of the deadliest illnesses for women today. The goal of the research presented in this talk, conducted at McGill University in Montreal, Canada, is to develop a low-power RF wearable device, which can screen breast tissues monthly. With such frequent monitoring, it may be possible to detect potentially harmful tissue changes, i.e., early-stage tumors. The method relies on inherent differences (in the electromagnetic sense) between the tumorous and healthy tissues at microwave (RF) frequencies. Since…

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IEEE CAES/C&SP – Graham Weinberg – Radar Detection Theory of Sliding Window Processes

August 17 @ 4:10 pm - 5:00 pm
S112, Engineering South,

Abstract Sliding window decision rules are suboptimal non-coherent detectors designed to regulate the false alarm rate while introducing a loss relative to optimal Neyman-Pearson decision rules. In earlier low-resolution radars these detectors were very popular and during the 1960s were investigated extensively. However, with the systematic improvements in radar resolution such detectors became difficult to design so that they achieved  the full constant false alarm rate (CFAR) property. This is primarily a result of the evolution in radar clutter models.…

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Yik Ling Lim – Methods and Verification of Loss Breakdown in an AC Brushless PM Soft Magnetic Composite Machine

August 24 @ 4:10 pm - 4:35 pm
S112, Engineering South,

Abstract Improving the efficiency and power density of permanent magnet machines has been of growing interest because of the large potential energy and material savings. Accurate and reliable methods of loss separation are required to identify the most significant machine losses to target for reduction in order to increase the efficiency. Machines made with stators of soft magnetic composites can offer higher power density. However, in such machines, the proximity of the rotor and stator windings to the end-caps may…

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