The compound resonator approach : Parity control and selectivity enhancement in N-resonator planar systems

The compound resonator approach considers a N-Resonator System (N-RS) as a single entity which exhibits N resonance modes. This approach extends to resonator systems the eigen-mode analysis applied to multiconductor transmission-lines as an attempt to bring together Electromagnetic (EM) and circuit representations in the analysis of N-Resonator Systems. Incorporating the loss effects and the control of the topological sensitivity in N-RS analysis is of prior importance to enhance the system selectivity. In this prospect, a concept of enabled/disabled state herein referenced as N-RS_off and N-RS_on systems is introduced. 30 dB rejection level improvement is experimentally demonstrated around 2 GHz combined with a spurious level less than 20 dB up to 12 GHz with a compact topology on a very low cost technology. The proposed approach also suggests systematic methodologies to draw potentialities of emergent technologies in terms of assessment factors including selectivity based on efficient use of EM simulations during synthesis process.