Design and Fabrication of a C-Band Patch Antenna with Low Loss BaMSiO Microwave Dielectric Ceramics.

Single-phase BaMSiO (M = Yb, Er, Y, Ho) ceramics have been investigated for their crystal structures, microwave dielectric properties, flexural strength, and potential applications in dielectric antennas. Rietveld refinement and TEM analysis revealed that the BaMSiO ceramics exhibit a monoclinic structure (space groups: 2/). The ε of the BaMSiO ceramics was dominated by ionic polarizability and ρ. The × values were considerably larger at BaMSiO (M = Yb and Y) ceramics with the high and low intrinsic dielectric loss. The τ values were controlled by the MO octahedron distortion and . The flexural strength was mainly dominated by pores and average grain size and reached the maximum value (156 MPa) at BaYSiO ceramic with small average gain sizes and high relative density. Additionally, a patch antenna was fabricated using high-performance BaYSiO ceramic characterized by a ε value of 9.02, a × value of 60620 at 12.30 GHz, and a τ value of -37.65 ppm/°C. This design achieved a high simulated radiation efficiency of 82.70% and a gain of 5.60 dBi at 6.97 GHz. indicating potential applications of BaYSiO ceramic because of its low dielectric loss and high flexural strength.