Radar antenna

Patent metadata

Field	Value
Publication number	US-11923609-B2
Application number	US-202017615045-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	May 29, 2019
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

Disclosed is a radar antenna including an antenna body including a first plate and a second plate; a slot radiation part and a slot reception part formed in the first plate; a transmission port and a reception port formed in the second plate; and a waveguide formed by assembling the first and second plates. The slot radiation part includes a first slot radiation part configured to radiate a radio wave in a first detection range, and a second slot radiation part configured to radiate radio waves in a second detection range having a larger width and distance than the first detection range.

First claim

The invention claimed is:

1. A radar antenna comprising:
an antenna body;
a slot radiation part and a slot reception part formed on one side of the antenna body;
a transmission port and a reception port formed on the other side of the antenna body; and
a plurality of waveguides formed in the antenna body, and configured to connect the slot radiation part to the transmission port, and connect the slot reception part to the reception port,
wherein the slot radiation part comprises a first slot radiation part configured to radiate a radio wave in a first detection range, and a second slot radiation part and a third slot radiation part configured to radiate radio waves in a second detection range having a larger width and distance than the first detection range, and
wherein the second and third slot radiation parts each comprise a plurality of slots arranged in a plurality of rows in top-to-bottom and side-to-side directions,
wherein the uppermost slot in the outermost row among the plurality of rows and the uppermost slot in a row inside the outermost row are arranged to deviate from each other in a side-to-side direction.

2. The radar antenna of claim 1 , wherein the second and third slot radiation parts are respectively arranged on both sides of the first slot radiation part.

3. The radar antenna of claim 1 , wherein the first to third slot radiation parts each comprise a plurality of slots,
wherein the number of slots included in each of the second and third slot radiation parts is larger than the number of slots included in the first slot radiation part.

4. The radar antenna of claim 1 , wherein the first slot radiation part comprises a plurality of slots arranged in one row in a top-to-bottom direction,
wherein the plurality of slots include in one row are arranged so that portions thereof do not sit on a straight line which connects the uppermost slot to the lowermost slot.

5. The radar antenna of claim 1 , wherein the first slot radiation part comprises a plurality of slots which are successively arranged at predetermined intervals in a zigzag manner in a top-to-bottom direction.

6. The radar antenna of claim 1 , wherein the second and third slot radiation parts each comprise a plurality of slots arranged in a plurality of rows in top-to-bottom and side-to-side directions,
wherein the plurality of slots included in at least one row are arranged so that portions thereof do not sit on a straight line which connects the uppermost slot to the lowermost slot.

7. The radar antenna of claim 6 , wherein the plurality of slots included in at least one row in each of the second and third slot radiation parts are arranged in a zigzag manner.

8. The radar antenna of claim 1 , wherein the uppermost slot in the outermost row is disposed at a lower level than the uppermost slot in the row inside the outermost row.

9. The radar antenna of claim 1 , wherein the uppermost slots in the respective rows are disposed at levels that gradually increase from the outermost row toward the row inside the outermost row.

10. The radar antenna of claim 1 , wherein the number of slots included in the outermost row is equal to the number of slots included in the row inside the outermost row.

11. The radar antenna of claim 1 , wherein the slot reception part is located at the center bottom of the front side of the antenna body.

12. The radar antenna of claim 1 , wherein the slot reception part comprises a plurality of slots arranged in a plurality of rows in top-to-bottom and side-to-side directions,
wherein the slots included in each of the rows are arranged on a straight line.

13. The radar antenna of claim 1 , wherein the number of the reception ports is larger than the number of the transmission ports.

14. The radar antenna of claim 1 , wherein the antenna comprises a first plate and a second plate,
wherein the plurality of waveguides are formed by assembling the first and second plates.

15. The radar antenna of claim 14 , wherein the waveguide is a straight channel formed by coupling the first to third slot radiation parts, a plurality of slot grooves which are formed on a rear side of the first plate so as to communicate with the slot reception part, and a plurality of concave grooves which are formed on a front side of the second plate so as to communicate with the transmission port and the reception port, respectively.

16. The radar antenna of claim 15 , wherein in the second slot radiation part, the transmission port formed as one slot on one side of the concave groove is connected to the second slot radiation part formed as a plurality of slots in a longitudinal direction of the slot groove along the waveguide formed by the concave groove and the slot groove.

17. The radar antenna of claim 15 , wherein the bottoms of the slot grooves corresponding to the second slot radiation part are arranged on the same line in a horizontal direction so as to correspond to a horizontal concave groove including the transmission port.

18. The radar antenna of claim 15 , wherein in the slot reception part, the reception port formed as one slot in the middle of the concave groove is connected to the slot reception part formed as a plurality of slots in the longitudinal direction of the slot groove through the waveguide formed by coupling the concave groove and the slot groove.

19. The radar antenna of claim 15 , wherein the slot groove has an inclined wall formed at a position facing a slot formed in the concave groove and configured to guide a radio wave.

Assignees

• Amotech Co Ltd

Inventors

• Park Hyun Joo
• Ryu Kyung Hyun
• Seo Yun Sik
• Lee Se Ho
• Heo Jeong Geun
• Do Han Ju
• Baek Hyung Ii

Classifications

• H01Q21/005 Primary

  Slotted waveguides arrays · CPC title

• H01Q13/10 Primary

  Resonant slot antennas · CPC title

• H01Q13/0233 Primary

  Horns fed by a slotted waveguide array (biconical horns H01Q13/06) · CPC title

• H01Q1/32

  Adaptation for use in or on road or rail vehicles · CPC title

• H01Q1/38

  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)} · CPC title