Patent ID: 6275125
Filing Date: 2001-08-14
Classification: H01P

Abstract:
A dielectric wave filter having at least two dielectric resonators in juxtaposition, each dielectric resonator comprising:(a) a dielectric body having a pair of opposite end surfaces, a plurality of side surfaces between the pair of end surfaces, and a resonance hole extending between the pair of end surfaces one of the side surfaces of each dielectric body confronting the other dielectric body;(b) an inner conductor covering an inner surface of the dielectric body;(c) an outer conductor covering parts of the side surfaces of the dielectric body, which parts are contiguous to one of the end surfaces of the dielectric body, the outer conductors on both dielectric bodies being joined to each other both mechanically and electrically;(d) a shorting conductor covering said one end surface of the dielectric body and electrically interconnecting the inner and the outer conductors;(e) a resonator coupling conductor covering parts of at least that side surface of each dielectric body which confronts the other dielectric body, the resonator coupling conductors on both dielectric bodies being joined to each other both mechanically and electrically;(f) a terminal conductor covering parts of the surfaces of each dielectric body and disposed adjacent the other of the end surfaces thereof, the terminal conductors on both dielectric bodies being disposed at least on those side surfaces of the dielectric bodies which face away from each other; and(g) an outer conductor extension extending from the outer conductor on each dielectric body toward said other end surface thereof and being formed to include a constricted neck portion and a head portion, the outer conductor extensions on both dielectric bodies being disposed at least on those side surfaces of the dielectric bodies which confront each other, thereby intervening between the terminal conductors on both dielectric bodies for electrically isolating the terminal conductors from each other.