NaLaMgWO6 microwave dielectric ceramics and their sub-6 GHz band microstrip patch antenna applications

NaLaMgWO 6 microwave dielectric ceramics have been synthesized via the standard solid-state reaction method. The Rietveld refinement of the X-ray diffraction patterns indicates that NaLaMgWO 6 crystallizes in a monoclinic crystal structure with a C 2/ m space group. Raman spectrum of the NaLaMgWO 6 ceramic is collected, and the correlations between the Raman active modes and chemical bond vibrations are systematically identified. The optimum microwave dielectric properties are obtained when sintered at 1550 °C, with ε r  = 17.1, Q f  = 26,150 GHz, and τ f  = − 83.4 ppm/°C. A microstrip patch antenna operating at the sub-6 GHz band is fabricated using the NaLaMgWO 6 ceramic as the substrate. The fabricated antenna resonates at 3.82 GHz, which exhibits an excellent S 11 value of − 26 dB, a minimum VSWR value of 1.07, and a satisfactory simulated efficiency of 72.2%. The good antenna performance demonstrates the great application potential of NaLaMgWO 6 ceramic in the sub-6 GHz band antennas.