Use Of Coplanar Technology Advantages For Tuneable Active Planar Looped Filter Structures Optimised In Noise

This article deals with technological considerations for the compact design of general planar looped systems that use active elements for frequency tuning and losses compensation. With our approach noise performances optimisation by analytical means is simultaneously led [1]. The technique is here applied to one-pole tuneable ring resonator structure for which both microstrip and coplanar versions have been implemented. We underline the ease in implementing such structures in coplanar technologies and validate our approach with measured results for the two versions.