Embedded filter's temperature effect analysis for high frequency applications

Embedded passive technologies [1] [2] in organic substrates are still under development as an alternative miniaturization solution for highly integrated system in package (SIP) [3] with RF multi-band functionalities. There are many technical issues to be applied in real products. Characterizing the statistical variation of the substrate against the effects of temperature deviation during design is crucial therefore this paper is concerned with the temperature effect for embedded filters in organic substrates. The filter's performance changes on temperature variation. It is one of the important issues when this technology is used in high frequency applications. A set of resonator structures is designed and fabricated as test vehicle in order to measure their scattering parameters from 1GHz up to 3GHz where the intended application is defined. Using a comparison of simulated response and measured data of the layer structure, the statistical variation of the effects of temperature provides an almost accurate representation of the embedded filter's resonance and unloaded Q-factor.