The problems associated with this project are with the identification of the correct thin-film materials technology required and with the analysis of thin, anisotropic, inhomogeneous, planar waveguiding structures. Such resonators would have applications as secondary frequency standards. Scattering parameters for all ports can be computed over any frequency range. Some novel components are envisaged. 3 years The aims of this project are to use finite element methods to investigate the dispersion behaviour and field distribution in coupled planar waveguides on the presence of layers of dielectric and longitudinally magnetised ferrite.
Some novel components are envisaged.
The intrinsic behaviour of isotropic forward and reverse couplers is also being studied. Dr Jiwei Fan Gel processing is being used for the production of homogenously doped ZnO varistors. To date Bi2O3 containing materials have been produced and shown to possess superior electrical properties to products obtained by conventional ceramic processing. The improvements are being related to changes in microstructure of the varistors. Alternative novel compositions for the varistors are being prepared by the citrate gel processing route.