LAUSR

Abstract Composites of BaBiLiTeO6 (BBLTO) - Li2MoO4 (LMO) and BaBiLiTeO6 - polytetrafluoroethylene (PTFE) were fabricated using cold sintering process and their microwave dielectric properties were investigated for the first time. Phase purity and reactivity of the composites were studied using XRD and vibrational spectroscopy. Influence of filler content, sintering duration and temperature on the density and dielectric properties of the composites were studied. Both BBLTO-LMO and BBLTO-PTFE composites exhibit dense microstructures at optimized sintering conditions. Broadband (10 MHz–1 GHz) dielectric response shows that relative permittivity ( e r ) and dielectric loss (tanδ) of composites are in the range of 9–16 and 0.02–0.11 respectively and the experimental relative permittivity is compared with theoretical models. A microstrip patch antenna based on BBLTO - PTFE composite was designed using High Frequency Structure Simulator (HFSS) software and the fabricated antenna radiates at 2.88 GHz with a return loss of −26.8 dB and impedance bandwidth of 90 MHz.