Abstract
The Ag concentration dependent microwave dielectric properties of Ni0.6Co0.4AgyMn2−yO4 (0.1≤y≤0.5) ceramic in bulk and thick film form were investigated in the 13GHz to 18GHz range by using perturbation of electromagnetically coupled Ag thick film microstrip ring resonator due to superstrate. The Ag thick film microstrip ring resonator has been used to predict microwave dielectric constant of superstrate material. The composition dependent ring resonator changes its response like resonance frequency (higher transmission) which is used to predict the dielectric constant of superstrate material. The overlaid decreases the resonance frequency with rising peak output and it shows the composition dependent variations in microwave dielectric constant and it increases with increase in Ag content. The values of the bandwidth of Ag thick film ring resonator increases with Ag content and Q (quality factor) value of ring resonator decreases.
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