New Miniaturized Multimode Resonators and Filter Applications

This two-year (2011/8 – 2013/7) proposal aims at developing new multi-mode planar resonators for microwave filter applications. In the first year (2011/8 – 2012/7), based on the well-known traditional dual-mode ring resonator, new miniaturized dual-mode, triple-mode, and quadruple-mode ring resonators and their applications to high-order microstrip filter design are investigated. The developed miniaturized filters are expected to demonstrate much lower insertion losses than those implemented by the traditional method. In addition to size reduction, creation of transmission zeros and wide upper stopband will also be taken into the design. In the second year (2012/08-2013/07), based on coupled-ring structures, miniaturized concentric dual-mode, triple-mode and quadruple-mode resonators are proposed to devise high-order bandpass filters. Emphasis is placed on the synthesis and the realization of the circuits, including possible transmission zeros at designated frequencies. Bandwidth design graphs derived from the coupling characteristics of adjacent resonators will be established. Several circuits will be realized. It is expected to produce at least two IEEE MTT-S IMS papers two IEEE TMTT and two IEEE MWCL journal papers under the support of this two-year proposal.

Project ID:PB10101-3623
External Project ID:NSC100-2221-E182-059-MY2