RF FILTER FOR TUNING COUPLING AMOUNT OR TRANSMISSION ZERO

摘要

PURPOSE: A RF filter for tuning coupling amount or transmission zero is provided to easily control a cross coupling amount between resonators by controlling capacitance between tuning elements using a lumped element or a tuning sliding member. CONSTITUTION: A cover is combined with the top of a housing member. A first tuning region(402a) is formed on an upper side(202a) of the cover. A second tuning region(402b) is formed on the upper side of the cover while being separated from the first tuning region. A dielectric region(410) is formed between tuning regions. A first tuning element(230) is arranged on the dielectric region.