Microwave filter with means for coupling degenerate modes

US6066996A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Franz-Josef Goertz · Burgstetten, DE
• Uwe Rosenberg · Backnang, DE
• Dietmar Schmitt · Kronberg, DE

Key dates

• Filing date: May 28, 1996
• Grant date: May 23, 2000
• Expiry date: May 28, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01P1/2082
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A microwave filter has at least two resonators, with at least two degenerated wave types resonance-capable in one resonator. The resonators are in operative connection with one another so that possible couplings of the degenerated wave types are only overcouplings and these overcouplings are located outside the resonator in which the two degenerated wave types are resonance-capable. As a result, the microwave filter has higher quality, improved selection properties and optimal polarization adapation.