Researchers at NASA's Johnson Space Center (JSC) have developed an automated method for producing intricate fabric-based circuits and antennas. The method enables the fabrication of complex single- or multilayer circuit patterns and will contribute to a new generation of mobile communication capabilities. Wearable electronics, or "e-textiles," currently operate in a number of niche areas, such as vests for firefighters and soldiers and shirts for monitoring patients' vital signs. To date, body-worn antennas encounter problems with comfort, degradation through flexure, and geometrical distortion. Unlike previous attempts, the JSC technology yields dimensionally stable conductive elements that have predictable and stable impedance characteristics and high surface conductivity, allowing operation at radio frequencies. The layout is compatible with conventional computer-aided design methods used to fabricate printed antennas. JSC has applied for patent protection for this technology.
Benefits
High performance: Enables complex circuitry through intricate patterns, such as those used for directional couplers or logarithmic spiral antennas
Efficient: Improves control of impedances with directional accuracy, allowing efficient radio frequency operation
Automated: Enables mechanized manufacturing techniques
Cost-effective: Offers modest set-up cost that is comparable to that of printed circuitry
Washable: Enables normal garment laundering
Durable: Features ability to withstand small radius flexing without damage
Applications
Clothing-based electronics and antennas
Fabric-skinned aircraft and balloons
Sensors and sensor networks on fabric structures
Membranes for large deployable reflector antennas
Small deployable antenna systems
Battlefield communication systems
Stealth and surveillance electronics
Antennas for sails and tents
[source: internet]
