Radar arrangement

US4881077A · kind A · utility

Assignee

• Licentia Patent-Verwaltungs-GmbH · DE

Inventors

• Franz Jehle · Ulm, DE
• Martin König · Günzburg, DE
• Erwin Wolfle · Wassertrüdingen, DE

Key dates

• Filing date: Jun 9, 1987
• Grant date: Nov 14, 1989
• Expiry date: Jun 9, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/935
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A radar arrangement which is particularly useful for the terrain following radar of an aircraft avoids disturbances from rain echoes by utilizing an antenna arrangement with a transmitting/receving directional antenna which is circularly polarized. A supplementary receiving antenna of orthogonally-circularly polarized type is used in conjunction with the directional antenna. From a comparison of the signal level distinctions is made between a target and a rain echo. The rain echo can thus be suppressed to give a truer target signal.