Dielectric performances of LSR-SiO2 nanocomposites for wearable antennas substrate

This paper studies the dielectric performances of liquid silicone rubber (LSR) and LSR-SiO2 nanocomposites, in connection with dynamic mechanical analysis (DMA) results on these materials. The methodology used is based on measurements of the dielectric spectra of the real part of the complex permittivity and of the loss tangent for unfilled LSR and nanocomposite samples, in the ranges $10^-{2}-{10}^6$ Hz for frequency and $30-80^{\circ}{\mathrm{C}}$ for the temperature. The main contribution refers to the temperature influence on the dielectric response of the tested materials. Finally, it was concluded on the suitability of the tested nanodielectrics as substrate for wearable microstrip antennas.