[Legacy Report] Power Handling and Temperature Compensation Design for Passive Microwave Devices
#Dr.
#Ming
#Yu
Modern communication and radar transmitter systems require high performance RF/Microwave devices and components, to improve communication and detection range. The increase in range is accomplished by increased transmitted power and higher receiver sensitivity. The increased transmitted power requires the engineer to estimate the transmitter’s power handling capability as part of the design process. In addition, the engineer has to meet several competing requirements at a specified pressure level, such as containment of transmitted bandwidth (wide or narrow, i.e., reduce adjacent channel spill over), minimize group delay variations, and reduce performance drifts with environmental condition changes (e.g., temperature, pressure, and humidity). When designing devices for these high-power operations, one often has to take into account the following effects: multipactor and ionization breakdown, passive intermodulation interferences and thermal-related issues such as temperature compensation. This talk will elaborate the physics background, technical challenges and design methodologies. It will also cover the clever use of both circuit and electromagnetic modeling techniques. Numerous examples will be presented from those widely used in the industry. The method presented is general and is applicable to all device types.
BIOGRAPHY
Dr. Ming Yu, IEEE Fellow, received the Ph.D. degree in electrical engineering from the University of Victoria, Victoria, BC, Canada, in 1995. In 1993, while working on his doctoral dissertation part time, he joined COM DEV, Cambridge, ON, Canada, as a Member of Technical Staff. He was involved in designing passive microwave/RF hardware from 300 MHz to 60 GHz for both space and ground based applications. He was also a principal developer of a variety of COM DEV’s core design and tuning software for microwave filters and multiplexers, including computer aide tuning software in 1994 and fully automated robotic diplexer tuning system in 1999. His varied experience also includes being the Manager of Filter/Multiplexer Technology (Space Group) and Staff Scientist of Corporate Research and Development (R&D). He is currently the Chief Scientist and Director of R&D. He is responsible for overseeing the development of company R&D Roadmap and next generation products and technologies, including high frequency and high power engineering, electromagnetic based CAD and tuning for complex and large problems, novel miniaturization techniques for microwave networks. He is also an Adjunct Professor with the University of Waterloo, ON, Canada. He holds NSERC Discovery Grant from 2004-2013 with Waterloo. He has authored or coauthored over 90 publications and numerous proprietary reports. He holds 8 patents with 6 more pending.
Dr. Yu is an IEEE Distinguished Microwave Lecturer from 2010 to 2012. He serves MTT committees as the Vice Chair of MTT-8 and served as Chair of TPC-11. He is a member of editorial board of many IEEE and IET publications. He was the recipient of the 1995 and 2006 COM DEV Achievement Award for the development a computer-aided tuning algorithms and systems for microwave filters and multiplexers.
Many of his publications are available at Waterloo Web site: http://ece.uwaterloo.ca/~mingyu/
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