The Naval Undersea Warfare Center Division Newport (NUWC Newport) has designed, tested, and patented a novel dielectric measurement device that operates over a broad range of frequencies to identify materials and material dielectric and magnetic properties. A patent-pending improvement adds conformal capabilities to take measurements on curved surfaces. The device functions by simultaneously measuring the complex scattering of s11 (reflection) and s21 (transmission). Reflection is measured in magnitude and phase over various frequencies, creating a chart unique to each specific material. Material characteristics can be computed from the measurements by a network analyzer or other analyzer devices.
Existing devices, such as parallel plates and waveguides, suffer from narrow bandwidth, poor performance on lossy materials such as biological materials high in water or fat, and typically require a specific shape in order to accurately measure a sample. The Navy’s device has been operated from 30 MHz to 600 MHz. Labview software has been developed to conduct the patented data calculations. The device is field portable and rugged.
- Broadband: Operates over a wide range of frequencies for more effective use on a large cross-section of materials
- Simple: Calibration is fast via a visual method, the device is touched to the subject material to take measurements, and the data is crunched to provide results
- Field Portable: Small, rugged device can measure flat and smooth surfacesSilicate glass bonded by the ABB process exceed 10MPa/m3 energy absorbing capacity, outperforming AlSi foams and all other cellular solids except end grain balsa
- US Patent 7,495,454
- Potential for collaboration with NUWC Newport researchers to further improve the technology and pursue joint opportunities