# US 2021/0333358 A1 · Radar module and method of aligning the same

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- Number: US 2021/0333358 A1
- Document ID: US20210333358A1
- Status: Published application
- Kind: A1
- Application number: 16/488,823
- Filed: 2018-11-21
- Published: 2021-10-28
- Earliest claimed: 2018-11-21
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Sehwan PARK; Kwangwoon KIM; Bumki PARK
- Web page: https://patentgrep.com/patent/US20210333358A1

## CPC

- G01S 7/4026: {Antenna boresight}
- G01B 7/30: for measuring angles or tapers; for testing the alignment of axes
- G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S 13/86: Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
- G01S 13/931: of land vehicles
- G01S 17/88: Lidar systems specially adapted for specific applications
- G05D 1/02: Control of position or course in two dimensions
- H01Q 1/2283: {mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package}
- G01S 7/4021: {of receivers}
- G01S 13/862: {Combination of radar systems with sonar systems}
- G01S 13/865: {Combination of radar systems with lidar systems}
- G01S 13/867: {Combination of radar systems with cameras}
- G01S 2013/93271: {in the front of the vehicles}
- G01S 2013/93272: {in the back of the vehicles}
- G01S 2013/93273: {on the top of the vehicles}
- 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
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A radar module and method of aligning the same are proposed. Particularly, it is proposed that a radar module provided to a vehicle includes an antenna including a radio wave transmitting unit and a radio wave receiving unit, a position sensor detecting a distorted angle of the antenna, and a first Integrated Circuit (IC) connected to the position sensor, wherein if a prescribed condition is met, the first IC calculates a correction value for correcting the distorted angle of the antenna.

## Claims

### Claim 1

A radar module provided to a vehicle, the radar module comprising:
an antenna including a radio wave transmitting unit and a radio wave receiving unit;
a position sensor detecting a distorted angle of the antenna; and
a first Integrated Circuit (IC) connected to the position sensor,
wherein if a prescribed condition is met, the first IC calculates a correction value for correcting the distorted angle of the antenna.

### Claim 2 (depends on 1)

The radar module of claim 1, wherein the prescribed condition is met if an angle detected through the position sensor is smaller than a threshold.

### Claim 3 (depends on 1)

The radar module of claim 1, further comprising a second IC processing data corresponding to a radio wave received through the radio wave receiving unit, wherein the first IC delivers the calculated correction value to the second IC so as to control the second IC to correct the data.

### Claim 4 (depends on 1)

The radar module of claim 1, wherein the position sensor comprises either a gyroscopic sensor or an acceleration sensor.

### Claim 5 (depends on 1)

The radar module of claim 1, wherein the radar module comprises a Front End Module (FEM) and a Back End Module (BEM), wherein the antenna is disposed on the FEM, and wherein the position sensor and the first IC are disposed on the BEM.

### Claim 6 (depends on 5)

The radar module of claim 5, wherein the FEM of the radar module corresponds to a Printed Circuit Board (PCB) top surface of the radar module and wherein the BEM of the radar module corresponds to a PCB bottom surface of the radar module.

### Claim 7 (depends on 5)

The radar module of claim 5, further comprising:
a third IC for providing power to the radar module; and
a connector for connecting the first to third ICs.

### Claim 8 (depends on 1)

The radar module of claim 1, wherein the first IC calculates the correction value for correcting the distorted angle of the antenna based on a ratio of a level of a radio wave received at a reference angle to a level of a radio wave received at an angle detected through the position sensor.

### Claim 9 (depends on 8)

The radar module of claim 8, wherein the first IC additionally calculates the correction value for correcting the distorted angle of the antenna based on an angle corresponding to a difference between a sensor value of a gyroscopic sensor included in an Electronic Control Unit (ECU) of the vehicle and a sensor value of the position sensor.

### Claim 10

A method of aligning a radar module provided to a vehicle, the method comprising:
detecting a distorted angle of an antenna including a radio wave transmitting unit and a radio wave receiving unit through a position sensor; and
calculating a correction value for correcting the distorted angle of the antenna through a first Integrated Circuit (IC) connected to the position sensor.

### Claim 11 (depends on 10)

The method of claim 10, wherein the correction value is calculated if a prescribed condition is met and wherein the prescribed condition is met if an angle detected through the position sensor is smaller than a threshold.

### Claim 12 (depends on 10)

The method of claim 10, further comprising:
delivering the calculated correction value to a second IC; and
correcting the data through the second IC.

### Claim 13 (depends on 10)

The method of claim 10, wherein the correction value for correcting the distorted angle of the antenna is calculated based on a ratio of a level of a radio wave received at a reference angle to a level of a radio wave received at an angle detected through the position sensor.

### Claim 14 (depends on 13)

The method of claim 13, wherein the correction value for correcting the distorted angle of the antenna is additionally calculated based on an angle corresponding to a difference between a sensor value of a gyroscopic sensor included in an Electronic Control Unit (ECU) of the vehicle and a sensor value of the position sensor.