equipment must be lightweight and versatile, such as on the battlefield, in mobile networks, or during space missions.
The idea came from electrical engineer Jennifer Hollenbeck, inspired by the shape-changing alien technology in the sci-fi series The Expanse.
In 2019, Hollenbeck teamed up with experts at APL, including materials scientist Andy Lennon and additive manufacturing engineer Steven Storck, to turn the concept into reality.
Their challenge was to 3D print nitinol into complex shapes, which is difficult because the material requires precise processing to retain its shape memory properties. After much trial and error, they successfully created an antenna that starts as a flat spiral disk when cool and transforms into a cone-shaped spiral when heated.
Heating the antenna without damaging its RF properties posed another hurdle. RF engineer Michael Sherburne and his team developed a special power line to heat the metal without disrupting its functionality.
The team faced many challenges, including the nitinol material attempting to change shape during the 3D printing process.
It took weeks to refine the method, but the team eventually optimized it for consistent production. Their persistence paid off, and the antenna performed as intended.
This technology has potential applications in areas like mobile communications, space exploration, and even specialized military operations.
APL is now pursuing patents for the antenna, the heating power line, and other related technologies.
“The ability to adapt an antenna’s shape for RF communication is game-changing,” said Conrad Grant, APL’s Chief Engineer. “This innovation showcases the power of collaboration across disciplines to tackle complex challenges.”
This shape-shifting antenna could pave the way for more adaptable, efficient technology across industries, marking a significant step forward in engineering and communications.
