Monostatic FMCW radar sensor
AssigneeRobert Bosch GmbH
InventorsHeinz Pfizenmaier, Paul Lowbridge, Brian Prime, Colin Nash, David Dawson
Life of this patent
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Abstract
According to the invention, a monostatic FMCW radar sensor for a vehicle for detecting objects is proposed in which at least one antenna feed in combination with a dielectric lens is embodied for both transmitting and receiving a corresponding echo signal. At least one antenna feed is connected to a ring mixer via a ratrace ring or double ratrace ring, so that an expensive circulator can be dispensed with. The high-frequency structure is advantageously embodied in planar microstrip form. A plurality of transmission and reception antennas are focused via one common lens.
Claims18
A FMCW radar sensor for a vehicle for detecting one or more objects, comprising a housing;
- a Gunn oscillator;
- at least one antenna aligned with a dielectric for electromagnetic millimeter waves;
- an evaluation circuit, said at least one antenna being embodied for both transmission and reception of a corresponding echo signal;
- a ring mixer;
- a rat-race ring connecting said at least one antenna to said ring mixer, said at least one antenna and also at least one element selected from the group consisting of said rat-race ring and said ring mixer being embodied in planar microstrip form;
- and a dielectric polyrod antenna disposed between said at least one antenna and said lens.
A FMCW radar sensor for a vehicle for detecting one or more objects, comprising a housing;
- a Gunn oscillator;
- at least one antenna aligned with a dielectric for electromagnetic millimeter waves;
- an evaluation circuit, said at least one antenna being embodied for both transmission and reception of a corresponding echo signal;
- a ring mixer;
- a rat-race ring connecting said at least one antenna to said ring mixer and formed as a T/R diplexer, said at least one antenna and also at least one element selected from the group consisting of said rat-race ring and said ring mixer being embodied in planar microstrip form.
A FMCW radar sensor for a vehicle for detecting one or more objects, comprising a housing;
- a Gunn oscillator;
- at least one antenna aligned with a dielectric for electromagnetic millimeter waves;
- an evaluation circuit, said at least one antenna being embodied for both transmission and reception of a corresponding echo signal;
- a ring mixer;
- a double rat-race ring connecting said at least one antenna to said ring mixer, said at least one antenna and also at least one element selected from the group consisting of said double rat-race ring and said ring mixer being embodied in planar microstrip form, said double rat-race ring having one rat-race ring provided for said mixer and another rat-race ring provided for a diplexer.
Dependencies are inferred from the claim text.