New for 2025! MTT-S Volunteer Spotlight | | |
Professor Xun Gong
Lockheed Martin Professorship at University of Central Florida
IEEE MTT-S Adcom Member and EICO Chair
How many years have you been an MTT-S member?
24 years. I just checked my IEEE account to verify that.
How did you start volunteering with MTT-S?
I joined University of Central Florida (UCF) as an assistant professor in August 2005. In 2007, I was elected as the Orlando AP/MTT chapter chair. In the same year, I became a steering committee member in IEEE MTT-S WAMICON (an international conference based in Florida). These two opportunities provide me with experience in both IEEE geographic units and technical societies. In the Orlando Section, I served as the secretary (2008), vice-chair (2009-2010), chair (2011) and awards chair (2012-2013). Within MTT-S, I have been involved in many conferences, workshops, editorial boards and etc. I have been an MTT-S adcom member since 2021.
What has been your favorite volunteer activity in MTT-S?
As the MTT-S education committee chair in 2023-2024. I was able to implement many exciting programs with the support from many committee members. We started the Distinguished Microwave Instructor (DMI) Program for undergraduate students, Multilingual Video Competition (MVC) program in IWS (Chinese) and LAMC (Spanish and Portuguese), NanoVNA program for all MTT-S and AP-S chapters around the world, and short courses for practitioners and graduate students.
What advice would you give to someone who is interested in becoming a volunteer with MTT-S?
Find an anchor point to start building your professional network. Looking back, I am grateful for the opportunities from the IEEE Orlando Section and WAMICON which helped me to grow my interests.
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| | Advancing RF GaN HEMTs: A Perspective on Measurement and Characterization Techniques | Gallium nitride (GaN) high-electron-mobility transistors (HEMTs) continue to play a critical role in radio frequency (RF) applications. Precise characterization of GaN HEMTs under realistic operating conditions is required for accurate modeling and device performance evaluation. This article presents a literature review of the various characterization techniques applied to GaN HEMTs with their associated challenges, including transient measurements, trap characterization, low-frequency to high-frequency device characterization methods, as well as thermal, near-field, and reliability measurements. | | | |
| | Characterization of Phased Arrays Using Amplitude-Modulated Interferometry | This article presents amplitude-modulated interferometry (AMI) as an approach for parallel testing and calibration of phased arrays. In AMI, each array element’s response is orthogonally modulated and aggregated, and the aggregate is squared using a noncoherent power detector. We present a theory for AMI and a technique for de-embedding its nonidealities. The methods are validated using measurements of an 8-GHz, 8-element array. Finally, AMI is compared to phase-modulated interferometry (PMI) and vector network analyzer measurements using a 28-GHz, 64-element array. | | | |
| | Employing Surface Waves for Characterizing Skin: Experimental Validation | Microwave technology has recently been explored as a non-invasive method for skin cancer diagnosis. In this work, surface wave transmissions generated by two antennas are employed to characterize skin cancer in a non-invasive way. The theoretical model shows that the transmission coefficient amplitude and phase shift can indicate both the presence and the size of skin tumors. Controlled experiments were conducted to validate the theory, using oil-gelatin-based phantoms to mimic both healthy skin and malignant tissue with varying tumor sizes. | | | |
| | High-Accuracy Wideband Frequency Measurement With Dual Optical Combs Using Solution Space Partitioning Method | In this article, the boundedness and reachability of a solution to the dual-comb ultrawideband frequency measurement problem is introduced. The theoretical limits of frequency measurement for dual-comb undersampling systems are defined, significantly enhancing both test accuracy and engineering practicability. This method can be widely applied to frequency measurement and signal estimation in RF and optical systems, paving new high-speed, accurate and robust pathways in microwave photonics metrology and ultrawideband signal processing. | | | |
| | Shape Estimation and Pattern Correction of Flexible Phased Arrays Using Local Curvature Measurements | This work presents a general method to estimate the unknown shapes of mechanically flexible phased arrays using strain gauge-based curvature measurements. Such information is crucial to resolve the positions and orientations of the radiators and perform effective beamforming. The procedure is feedback-free, insensitive to electromagnetic interference, and provides a low-frequency modality of shape information. The method is demonstrated using a 20-cm, 1x8 phased array operating at 6 GHz. | | | | |
WAMICON 2025 Recap
By Mike Hallman, WAMICON Publicity Co-Chair
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The 26th Annual IEEE MTT-S WAMICON was held April 14-15 in Cocoa Beach, Fla. Along with the three track conference on the latest in wireless and microwave innovations, the unique mix of ocean views with speakers, exhibitors and attendees representing industry, government and academia continues to be a winning formula. WAMICON began as a one-day forum in 1999 as a spinout from the University of South Florida WAMI (Wireless and Microwave) Advisory meetings. The 2025 General Chair, Michael Grady, Honeywell, gave a welcome address reminding us that our strength as a community comes from collaboration and that WAMICON is more than a conference – it is a family! View the photo gallery for a small sample of what keeps visitors returning each year to the conference.
The 2025 event had a focus on “Integrated Innovations: Merging Software, Circuits, and Antennas for Next-Generation Interconnected Systems” and had three parallel tracks on all aspects of RF Design and Microwave Microelectronics and Systems.
The opening Keynote address was, “Microfluidics, Thermal Management, and Partnership: The Creation of a New High-Tech Ecosystem,” by Dr. Thomas Weller, Oregon State University. The day two Keynote was “Opportunities for Magnetic Materials in Next-Generation Wireless Systems,” by Dr. David Arnold, University of Florida. Additionally, the final keynote was given by 2025 Henning Award Winner, Dr. John Papapolymerou, Michigan State University, who presented, “Heterogeneous Integration and Packaging of RF Electronics and Components for 5G+ Wireless Communication Systems Using Additive Manufacturing Techniques.”
Technical program highlights included sessions on Advancements In Power Amplifiers; Internet of Everything (IoE) and Machine Learning; Innovations in Passive Devices and Antenna Components; Emerging RF Technologies; Components, and Signal Processing for Communications; Filters, State-of-the-Art of Electromagnetics Interactions and Interference; Recent Advances in Antenna Technologies; Heterogeneous Integration and Systems; Sub-THz and THz Systems and Measurements; Advancements in RF Applications for Space Technologies; Additively Manufactured Components for RF/Wireless Systems; and Advancements in Radar Technologies.
The program also featured a panel session with lively discussion on, “An Open Conversation: Can AI Replace Traditional RF Design? — Exploring the Future of Expertise in the Age of Algorithms,”, moderated by Dr. Eduardo Rojas, Embry Riddle Aeronautical University. Panels were also part of the agenda in the Student Day and IEEE Young Professionals and Women in Microwave Sessions.
| | Welcome to the inaugural IEEE International Conference on Additively Manufactured Electronic Systems (AMES). This conference series from IEEE Council on RFID offers a premier venue to share, discuss, and witness research results in all areas of Additively Manufactured Electronic Systems technologies and their applications. |
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WPTCE2025 is the largest event in the world for wireless power research and industry engagement, covering a wide range of topics, applications, frequencies, and power levels.
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The RFIC 2025 technical program features 113 cutting-edge papers organized into 24 sessions, highlighting innovation across the RF to THz spectrum. Key focus areas include mm-Wave and D-band circuits, advanced transmitters, low-noise front ends, and high-performance frequency synthesizers. A strong emphasis is on scalable, low-power designs suitable for next-generation wireless, radar, and imaging systems as well as emerging topics such as AI-assisted design and quantum computing applications.
Trends in sub-THz radar, integrated sensors, and start-up-driven solutions showcase the growing role of RFICs in automotive, biomedical, aerospace, and high-speed communication applications. Several papers explore enabling technologies for 6G, including ultra-broadband front ends, D-band and sub-THz transceivers, and high-capacity data converters, laying the groundwork for future high-speed, low-latency networks.
With contributions from both academia and industry, the program reflects a strong balance between foundational research and practical implementation—pushing the limits of performance, integration, and miniaturization for the next generation of intelligent, connected systems.
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Join thousands of engineers, researchers, executives, academics, and more at the 2025 IEEE MTT-S International Microwave Symposium (IMS2025) in San Francisco, 15-20 June 2025! This is where the community comes together to share challenges and solutions, learn about groundbreaking theories and practices, and explore cutting-edge products and services at our largest Exhibit Floor in years. Plus, find special programs for Young Professionals, Women in Microwaves, and Start-Ups.
Sign up by 16 May 2025 to get the lowest rate!
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Editor-in-Chief
Dr. Hjalti Sigmarsson
University of Oklahoma, USA
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