# US 12,009,584 B2 · Radar system having a plastic antenna with reduced sensitivity to interference waves on the antenna and to reflections from a sensor cover

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,009,584 B2
- Document ID: US12009584B2
- Status: Granted
- Kind: B2
- Application number: 17/249,716
- Filed: 2021-03-10
- Published: 2021-06-24
- Granted: 2024-06-11
- Earliest claimed: 2018-09-11
- Assignees: Conti Temic microelectronic GmbH
- Applicants: Conti Temic microelectronic GmbH
- Inventors: Markus Wintermantel
- Web page: https://patentgrep.com/patent/US12009584B2

## CPC

- H01Q 1/3283: {side-mounted antennas, e.g. bumper-mounted, door-mounted (mounted on windscreens H01Q1/1271)}
- H01Q 21/064: {using horn or slot aerials (slotted waveguides arrays H01Q21/005)}
- G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S 13/4418: {with means for eliminating radar-dependent errors in angle measurements, e.g. multipath effects}
- G01S 13/4454: {phase comparisons monopulse, i.e. comparing the echo signals received by an interferometric antenna arrangement}
- G01S 13/931: of land vehicles
- H01Q 1/32: Adaptation for use in or on road or rail vehicles
- H01Q 1/3233: {particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems}
- H01Q 1/38: formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142)}
- H01Q 1/523: {between antennas of an array}
- H01Q 1/525: {between emitting and receiving antennas}
- H01Q 1/528: {reducing the re-radiation of a support structure (in a parabolic reflector antenna H01Q19/023)}
- H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

A radar system for detecting the surroundings of a motor vehicle, the radar system includes a plastic-based antenna having a front side facing a cover. The plastic-based antenna has a plurality of individual antennas for transmitting and/or receiving radar signals to detect objects and/or determining angles thereof. The front side between the individual antennas is configured to be at least partially not reflective on a surface thereof such that interference waves on the surface of the plastic-based antenna and/or reflections between the plastic-based antenna and the cover are suppressed or the negative effects thereof on the determination of angles are at least reduced.

## Claims

### Claim 1

A radar system for detecting the surroundings of a motor vehicle, the radar system comprising:
a plastic-based antenna having a front side facing a cover, the plastic-based antenna having plurality of individual antennas for transmitting and/or receiving radar signals to detect objects,
wherein the front side of the plastic-based antenna is configured to be at least partially not reflective on an upper surface therof,
wherein the front side of the plastic-based antenna has a non-planar reflective surface, individual antennas among the plurality of individual antennas have a concentration in the vertical dimension with a main beam direction approximately at elevation 0°, and the non-planar reflective surface surface does not run linearly with respect to vertical sections.

### Claim 2 (depends on 1)

The radar system as set forth in claim 1, wherein the non-planar reflective surface runs with a stepped or sawtooth-shaped course or combinations thereof with respect to vertical sections.

### Claim 3 (depends on 1)

The radar system as set forth in claim 1, wherein the non-planar reflective surface is at least partially non-planar outside of the individual antennas.

### Claim 4 (depends on 1)

The radar system as set forth in claim 1, wherein the individual antennas at least partially have a non-planar surface.

### Claim 5

A radar system for detecting the surroundings of a motor vehicle, the radar system comprising:
a plastic-based antenna having a front side facing a cover, the plastic-based antenna having a plurality of individual antennas for transmitting and/or receiving radar signals to detect objects,
wherein the front side of the plastic-based antenna between individual antennas among the plurality of individual antennas are configured to be at least partially non-metallized on surfaces of the individual antennas and are configured at least partially from plastic material which partially or wholly absorbs radar waves, and/or the front side of the plastic-based antenna comprises passive antennas disposed between the individual antennas, and the passive antennas absorb at least a part of power received by them, and/or the front side of the plastic antenna between the individual antennas is configured to be at least partially not reflective, that is in particular not metallized, on the surface thereof, wherein in particular the structures and/or metallizations inside the antenna are not universally homogeneous, and/or the front side of the plastic-based antenna comprises a non-planar, reflective surface, that is in particular a non-planar metallized surface, and/or edges of the front side of the plastic-based antenna lie obliquely to the individual antennas, and
wherein interference waves on the surfaces of the individual antennas and/or reflections between the individual antennas and the cover are suppressed or respectively the negative effects thereof in particular on the determination of angles are prevented or reduced.