Abstract
The layered dielectric resonator structures composed of Ba 2Ti 9O 20 (BTO) and Ba 1.85Sm 4.1Ti 9O 24 (BSTO) ceramic pellets were introduced to design new microwave dielectric materials with adjustable dielectric constant between 50 and 70. Good combination of microwave dielectric properties ( ɛ r,eff = 50 ~ 70, Qf = 11,700–19,100 GHz and τ f = − 4.3 to − 1.5 ppm/°C) was obtained by the present approach, and such combination could be optimized by adjusting the volume fraction of BSTO and stacking scheme. For practical applications, the BTO and BSTO layers could be bonded by low-loss adhesive, and the effects of the adhesive on the microwave dielectric properties were limited.
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