Radar distance measuring device

US5659321A · kind A · utility

Assignee

• Endress+Hauser Inc. · DE

Inventors

• Stefan Burger · Birkenfeld, DE
• Johanngeorg Otto · Aalen, DE

Key dates

• Filing date: May 10, 1995
• Grant date: Aug 19, 1997
• Expiry date: May 10, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/34
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A conventional radar module (1) for level measurements is designed for operation within a specific, narrowly restricted frequency range. To enable level measurements to be implemented at a substantially higher frequency without involving any change in the existing radar module (1) whatsoever, a frequency converter circuit (2) is inserted between the duplexer antenna (7) designed for said higher frequency and the antenna port (A) of the radar module (1). This frequency converter circuit (2) which can be realized at small expense converts the lower frequency into the higher frequency in the direction from the radar module (1) to the antenna (7) and the higher frequency into the lower frequency in the opposite direction.