Improved Spurious Free Performance of Multi-Layer Multipermittivity Dielectric Resonator in Mic Environment

Abstract

Abstract-In this paper, a novel approach has been suggested to obtain an improved spurious-free window for dielectric resonator in microwave integrated circuit environment. In microwave integrated circuit environment, the dielectric resonator placed on a thin dielectric substrate gets located asymmetrically with respect to its shielding enclosure. A reduced separation in frequencies (mode separation) is one of a consequence of this asymmetry that may become a cause of spurious modes. This adverse influence of asymmetry is sought to be compensated by proposing a multi-layer multi-permittivity dielectric resonator structure with several layers of differing permittivity. The suggested approach takes advantage of the fact that the mode separation of a dielectric resonator configuration can be correlated to relevant resonance mode fields. By perturbing the resonance mode fields through the suggested multi-layer multi-permittivity approach, the adverse influence of asymmetry is found to reduce considerably over a comparative Conventional Ring dielectric resonator in microwave integrated circuit configuration. Still more improvement in mode separation are shown when the shape of the multi-layer multipermittivity ring dielectric resonator is further modified, suggesting a scope for optimization in present approach.

Experimental Wireless Link and SAR Assessments of an Implantable PIFA for Biotelemetry in the 2.45 GHz Band

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“…This asymmetry reduces the mode separation which consequently leads to inferior spurious response of the system. The effect of this asymmetry can be compensated using appropriate stacking of layers of different permittivity (MLMP) . The mode separation of a DR has a direct correlation with its resonant mode fields.…”

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