Synthesis and dielectric characterisation of a low loss BaSrTiO3/ABS ceramic/polymer composite for fused filament fabrication additive manufacturing

Composite polymer/ceramic filaments for material extrusion-based fused filament fabrication additive manufacturing, using barium strontium titanium oxide (BST) ceramics and acrylonitrile butadiene styrene (ABS) thermoplastics were produced; their dielectric physical properties have been characterised the first time. The properties, relative permittivity (εr), quality factor (Q×f) loss (tanδ) measured as a function of ceramic solid loading (%) at 5 GHz 3D printed samples. A εr = 6.05, Q×f 10,433 tanδ 0.007 obtained BST/ABS polymer composite, with 50 wt% (15 vol%) loading. composite materials exhibit reduced losses compared to standard laminates currently used in radiofrequency (RF) telecommunications industry. Based on filament, prototype microstrip patch G antenna hemispherical lens designed manufactured. Through testing, it shows good performance centre frequency f0 3.78 (−10 dB) bandwidth 90.6 MHz. increased gain by 3.86 dBi.