Patent ID: 6822538
Filing Date: 2004-11-23
Classification: H01P

Abstract:
A dielectric filter, comprising:a dielectric substrate having a substantially planar upper surface, an opposing lower surface and first and second end surfaces extending between the upper and lower surfaces; an outer conductor formed on at least the lower surface of the dielectric substrate; a plurality of resonance lines, each of the resonance lines: being located on the upper surface of the dielectric substrate; extending from the first end surface to the second end surface of the dielectric substrate; and having opposite open circuit ends at the end surfaces of the dielectric substrate; at least one resonance line of the plurality of resonance lines having at least one stepped part located between its open circuit ends, the at least one stepped part defined by at least a first width portion and a second width portion, the first width portion having a width smaller than that of the second width portion, wherein when a length of the first width portion is shorter than a length of the second width portion inductive coupling occurs, and when the length of the first width portion is longer than the length of the second width portion capacitive coupling occurs.