HIGH ISOLATION BETWEEN TRANSMIT AND RECEIVE ANTENNA IN FMCW RADARS

A frequency modulated continuous wave, FMCW, radar antenna (700) that may provide isolation between the transmit, Tx, antenna (728) and the receive, Rx, antenna (726) based on the arrangement of the transmit elements (724) and the receive elements. The transmit antenna elements may be orthogonally f...

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Bibliographic Details
Main Author CHIVUKULA, Rajesh
Format Patent
LanguageEnglish
French
German
Published 11.10.2023
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
ELECTRICITY
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
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Summary:A frequency modulated continuous wave, FMCW, radar antenna (700) that may provide isolation between the transmit, Tx, antenna (728) and the receive, Rx, antenna (726) based on the arrangement of the transmit elements (724) and the receive elements. The transmit antenna elements may be orthogonally fed, e.g., different by 90 degrees, compared to the receive antenna elements. For example, for horizontally polarized receive antenna elements, the transmit elements may be vertically polarized, or vice versa. The cross-polarized antenna elements may cause attenuation of surface waves between the Tx and Rx antennae. A low insertion loss 90-degree polarizer layer (720) over one of the transmitter antenna, or the receiver antenna, to convert either the transmitted signals or the received reflections by 90-degrees so the reflected signal matches the polarization of the receiver antenna.
Bibliography:Application Number: EP20230162255