School of Engineering Department of Electronic and Computer Engineering 153 Piezoelectric Micromachined Ultrasonic Transducers for Sensing and Imaging Supervisor: YANG Yansong / ECE Student: CHEN Hongyu / ELEC Course: UROP 1100, Fall Based on the previous two semesters, I further studied the structure and principles of PMUTs this semester under the guidance of Professor Yang. There are two parts of my work: 1: PMUT structure building and simulation. PMUT means Piezoelectric Micromachined Ultrasonic Transducers. They are MEMS-based piezoelectric ultrasonic transducers. The piezoelectric effect is the main functioning principle applied in PMUT. My target is to build a single-unit 2D (cross-section) PMUT model to learn its functioning principles and properties in detail. 2: Equipment training in the NFF lab. I also did some equipment training to accumulate experience in the NFF lab this semester. Piezoelectric Micromachined Ultrasonic Transducers for Sensing and Imaging Supervisor: YANG Yansong / ECE Student: KIM Jae Yup / ELEC Course: UROP 1000, Summer As 6G technology approaches, advancements in wireless communication have accelerated significantly. Similarly, developments in Radio Frequency (RF) technologies are now subject to heightened demands for performance, compactness, power efficiency, and bandwidth. Unlike earlier versions, modern RF technologies encounter challenges such as scalability, power handling, linearity, and integration with complementary metal-oxide-semiconductor (CMOS) processes. With a growing population and limited bandwidth, exploring tunable RF filters and research into the terahertz spectrum is becoming increasingly important. Future advancements in RF technology should prioritize improving existing filters' linearity and power efficiency while reducing insertion losses and device size to develop more compact, high-performance systems. Some experts argue that the potential of current materials has been nearly exhausted, emphasizing the need to explore innovative materials and designs to overcome the inherent limitations of today’s technologies. To meet the growing demands of next-generation wireless systems, industries, and researchers continually seek new solutions when existing approaches fall short. This report explores the current limitations of RF technology and examines strategies to address both present and future challenges.
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