Dr. Q.J. Zhang, Professor, Carleton University, advanced the theory and practice of active and passive computer-aided design with innovations in linear and nonlinear device modeling and circuit optimization for which he received the IEEE Fellowship. His contributions to sensitivity analysis, design optimization, and knowledge-, neural network- and electromagnetics-based modeling of microwave devices and circuits allowed radio-frequency and microwave designers to conquer prohibitive design tasks. His innovations have globally impacted commercial and military design technologies for satellite and terrestrial communication circuits, including wireless and wireline links, as well as modeling and fabrication of semiconductor devices involving electrical, electromagnetic and thermal effects.