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Graduate Publications
Graduate Publications
Anjali Agrawal, Zhenghong Chen, Braden E. Desman, Jinhua Wang, Akiyoshi Tanaka, Fahim Foysal, Charlie D. Hess, Will Farrell, Jim Owens, Daniel S. Truesdell, Benton H. Calhoun
Key Contribution:
Motivation:
With the miniaturization of ICs for in-textile applications, integrating multifunctional blocks becomes increasingly complex. This challenge drives the innovation of Network-on-Textiles (kNOTS), enabling seamless communication within fabric-embedded electronics. In a multichiplet network system, precise timing synchronization and accurate time-stamping between sensors, memory, and MCU are critical. This necessity demands a high-precision, tunable on-chip oscillator and a robust multichiplet synchronization system, ensuring reliable and efficient data exchange across the textile-embedded network.
Design of the Tunable on-chip Oscillator:
The Synchronisation system, design, and results can be found here.
A 0.36 mm² On-the-Fly I2C-to-SPI Converter for E-Textile Applications (Accepted in ISCAS 2025)
A 0.36 mm² On-the-Fly I2C-to-SPI Converter for E-Textile Applications (Accepted in ISCAS 2025)
Omar Faruqe, Zhenghong Chen, Suprio Bhattacharya, Md. Fahim Foysal, Samit Hasan, Daniel S. Truesdell, Benton H. Calhoun
Key Contribution:
Designed and validated a custom I2C-SPI converter chip to ensure efficient data communication.
Conducted extensive functional and performance testing on the custom-designed I2C-SPI converter to verify reliability and accuracy.
Benchmarked and analyzed Commercial Off-The-Shelf (COTS) converters to compare performance metrics and optimization potential.
Integrated and debugged a system-level interface between Logic Analyzer, FPGA, Converter, and Flash Memory to ensure seamless communication.
Implemented the custom SoC RTL on the Xilinx PYNQ-Z1 board, ensuring full compatibility with system components.
Documented findings and performance metrics, providing insights for future design iterations and improvements.
Undergraduate Publications
Undergraduate Publications
Authors: Niyaz Mahmud Sayem, Abul Kalam Muhammed Baki, Fahim Faysal, Sheikh Tanvi Mahmud, Ahmed Jubayer, Tawsif Ahmed Rifat
Wireless communication systems require antennas of varying sizes, shapes, frequency bands, and radiation patterns to meet technical demands, physical constraints, and FCC regulations. Different frequency bands serve distinct applications: S-band (2–4 GHz) for navigation, C-band (4–8 GHz) for airborne RADAR, X-band (8–12 GHz) for satellite communications, and millimeter-wave (40 GHz and above) for autonomous vehicles. Additionally, Ultrawide Band (UWB) antennas play a crucial role in medical imaging, radar systems, software-defined radios, and equipment health monitoring.
This paper presents novel microstrip patch antenna designs tailored for various applications in future 6G systems. Specifically, we discuss a V-shaped patch antenna at 2.4 GHz for Wi-Fi applications and a hexagonal slotted half-circular patch antenna at 4.29 GHz with an omnidirectional radiation pattern suitable for energy harvesting and biomedical use. Each antenna is designed to address specific needs, such as UWB operation, high gain, or customized radiation patterns. Additionally, we detail the prototype development and testing results of the 4.29 GHz hexagonal slotted antenna, demonstrating its potential for practical deployment.
These antenna designs contribute to the evolution of 6G wireless systems, offering optimized performance for diverse applications in modern communication and sensing technologies.
Authors: Md. Fahim Foysal; Saheel Mahmud; A. K. M. Baki
By 2030, 6G wireless networks will enable fully autonomous systems across various applications, including fully automated vehicles. These vehicles, equipped with integrated RADAR technologies, will require antennas with different gains, half-power beam widths (HPBW), and radiation zones to support functions such as parking assistance, lane changing, emergency braking, and traffic jam assist.
The Federal Communications Commission (FCC) has proposed millimeter-wave (mmW) frequency bands for vehicular RADAR systems. This paper presents the development of an optimized 2×4 array antenna designed for enhanced performance in autonomous vehicles. The array antenna operates at a frequency of 77 GHz and exhibits improved characteristics, including higher gain and reduced mutual coupling effects. The designed 2×4 corporate feed array antenna achieves a gain of 18.0 dB, with a return loss of -39.8947 dB.
Authors: Fahim Foysal; Saheel Mahmud; A. K. M. Baki
Future 6G communication systems will incorporate fully autonomous technologies for various applications, including autonomous vehicles. These vehicles, equipped with integrated RADAR systems, will require antennas with varying gains, half-power beamwidths (HPBW), and radiation zones to support functions such as parking assistance, lane changing, emergency braking, and traffic jam assist.
Millimeter-wave (mmW) frequency bands have been recommended by the Federal Communications Commission (FCC) for vehicular RADAR systems. This paper presents the development of a novel tooth-shaped patch antenna designed for enhanced performance in autonomous vehicles. Operating at 77 GHz, the proposed antenna demonstrates reduced mutual coupling effects and improved gain. Specifically, the novel antenna achieves a gain of 9.4 dB and a current distribution of 1.36×1031.36 \times 10^31.36×103 A/m, compared to the conventional patch antenna, which exhibits a gain of 7.2 dB and a current distribution of 4.99×1024.99 \times 10^24.99×102 A/m. Additionally, the return loss of the tooth-shaped antenna is measured at -37.9441 dB.
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