MICROWAVE RESONANT CIRCUIT AND TUNABLE MICROWAVE FILTER USING SAME

摘要

The invention concerns a microwave resonant circuit and a tunable microwave filter using said resonant circuit. The resonant circuit comprises at least a resonant microwave strip element, the resonant microwave strip element including at a conductive strip (1) and a ground plane (4). The resonant circuit comprises at least a composite element (3) consisting of alternating ferromagnetic layers and insulating layers placed between the conductive strip and the ground plane. The invention is generally applicable to any transmission/reception device using a frequency tuning in the microwave domain such as, for example, multiband mobile telephones.