Stretchable Antenna for Wearable Health Monitoring Makes Milestone
The work on the antenna builds on previous research from the NC State lab to create elastic conductors and multifunctional sensors using silver nanowires.A stretchable antenna that can be incorporated into wearable technologies, such as health monitoring devices, has been developed by researchers from North Carolina State University. The researchers wanted to develop an antenna that could be stretched, rolled or twisted and always return to its original shape because wearable systems can be subject to a variety of stresses as patients move around. In doing so, they learned that, while the antenna's frequency does change as it is stretched, since that changes its dimensions, the frequency stays within a defined bandwidth. The researchers detailed their work in a paper, "Stretchable and Reversibly Deformable Radio Frequency Antennas Based on Silver Nanowires," which was published online in ACS Applied Materials & Interfaces. The antenna is well-suited for applications such as wireless strain sensing. The material and fabrication technique reported in the paper could then theoretically be extended to achieve other types of stretchable antennas with more complex patterns and multilayer structures.
"Many researchers—including our lab—have developed prototype sensors for wearable health systems, but there was a clear need to develop antennas that can be easily incorporated into those systems to transmit data from the sensors, so that patients can be monitored or diagnosed," Dr. Yong Zhu, an associate professor of mechanical and aerospace engineering at NC State and senior author of the paper describing the work, said in a statement.