ULTRA MICRO SIZE OF LAMINATED BALANCE FILTER CAPABLE OF CONTROLLING FILTER CHARACTERISTICS DEPENDING ON THE ARRAY OF RESONATORS

摘要

PURPOSE: A miniaturized laminated balance filter is provided to allow for production of ultra micro size filter by using a resonator having permitting a capacitor unit and an inductive unit to have different line widths. CONSTITUTION: A miniaturized laminated balance filter comprises a first resonance line(41) formed on a first dielectric sheet(ST1), wherein the first resonance line includes a first capacitive portion(41A) formed into a wide strip line and a first inductive portion(41B) extended into a narrow strip line from the first capacitive portion; a second resonance line(42) formed on the first dielectric sheet, wherein the second resonance line includes a second capacitive portion(42A) formed into a wide strip line and a second inductive portion(42B) extended into a narrow strip line from the second capacitive portion; a third resonance line(43) formed on a second dielectric sheet(ST2) laminated beneath the first dielectric sheet, wherein the third resonance line includes a third capacitive portion(43A) formed into a wide strip line and a third inductive portion(43B) extended into a narrow strip line from the third capacitive portion and electrically connected to the first inductive portion; a fourth resonance line(44) formed on the second dielectric sheet, wherein the fourth resonance line includes a fourth capacitive portion(44A) formed into a wide strip line and a fourth inductive portion(44B) extended into a narrow strip line from the fourth capacitive portion and electrically connected to the second inductive portion; and a balance output terminal connected to the second and fourth capacitive portions.