Resonator structure comprising metal coated tubular carrier and having slits in the metal coating

US4742320A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz Pfizenmaier · Leonberg, DE
• Franz Straus · Stuttgart, DE
• Ewald Schmidt · Ludwigsburg, DE

Key dates

• Filing date: Mar 26, 1986
• Grant date: May 3, 1988
• Expiry date: Mar 26, 2006

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01P7/082
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

To improve the space factor of a barium titanate resonator, the resonator is a tubular carrier (11) having metal layers on the inner and outer surfaces. At least one of the metal layers is axially interrupted by a slit. Terminal connections for the resonator are located adjacent the slit on the interrupted layer, and on the continuous layer. For shielding, preferably, the continuous layers at the outside and end tabs (FIG. 4) may additionally be provided. More than one axially staggered inner/outer electrode layer system may be provided on one tubular carrier.