Granted Patent B2

US 12,294,137 · App. 17/944,860 · Granted May 6, 2025

Inventors: Toshiki Sayama (Tokyo, JP); Hideaki Shoji (Tokyo, JP); Yusuke Kato (Tokyo, JP); Shoichi Takeuchi (Tokyo, JP)

Assignee: AGC INC.

H01Q1/1271H01Q1/325H01Q9/0407H01Q25/005

Abstract

Claims (29)

1. An antenna system for vehicles, comprising:

a first antenna attached in a vicinity of a windshield of a vehicle; and

a second antenna attached in a vicinity of a rear glass of the vehicle,

wherein the first antenna and the second antenna are configured to transmit and receive an electromagnetic wave in a predetermined frequency band F, and

wherein, defining a region A and a region B with respect to a vehicle center axis extending in a traveling direction of the vehicle, so as to bisect a vehicle width of the vehicle from a viewpoint in a direction normal to a horizontal plane, the first antenna is arranged in the region A, and the second antenna is arranged in the region B,

wherein, defining a front-side boundary line that is orthogonal to a vehicle width direction of the windshield in the region A as viewed from the viewpoint in the direction normal to the horizontal plane,

defining a region between the front side boundary line and an edge side of the windshield on the region A side, as a front-side first region, and

defining a region between the vehicle center axis and the front side boundary line, as a front-side second region,

the first antenna is arranged in the front-side first region, and

wherein, denoting a width of the front-side first region and a width of the front-side second region in the vehicle width direction passing through the first antenna as W F1 and W F2 , respectively, W F1 /(W F1 +W F2 ) is greater than or equal to 0.05 and less than or equal to 0.90,

wherein, denoting a distance from a lowest position of the windshield to a highest position of a roof of the vehicle in the direction normal to the horizontal plane in a front view of the vehicle as H F , the first antenna is arranged within a range from the highest position of the roof to 0.5×H F , and

wherein the frequency band F includes 5.9 GHz.

2. The antenna system for vehicles as claimed in claim 1 , wherein in the vicinity of the windshield, an antenna capable of transmitting and receiving the predetermined frequency band F is only the first antenna, and

wherein in the vicinity of the rear glass, an antenna capable of transmitting and receiving the predetermined frequency band F is only the second antenna.

3. The antenna system for vehicles as claimed in claim 1 , wherein defining a rear-side boundary line that is orthogonal to a vehicle width direction of the rear glass in the region B as viewed from the viewpoint in the direction normal to the horizontal plane,

defining a region between the rear-side boundary line and an edge side on the region B side of the rear glass as a rear-side first region, and

defining a region between the vehicle center axis and the rear-side boundary line is denoted as a rear-side second region,

the second antenna is arranged in the rear-side first region, and

wherein, denoting a width of the rear-side first region and a width of the rear-side second region in the vehicle width direction passing through the second antenna as W R1 and W R2 , respectively, W R1 /(W R1 +W R2 ) satisfies to be less than or equal to 0.90.

4. The antenna system for vehicles as claimed in claim 1 , wherein, denoting a distance from the lowest position of the windshield to a highest position of the windshield in the direction normal to the horizontal plane in the front view of the vehicle as H GF ,

the first antenna is arranged within a range from the highest position of the windshield to 0.5×H GF .

5. The antenna system for vehicles as claimed in claim 1 , wherein, denoting a distance from a lowest position of the rear glass to the highest position of the roof of the vehicle in the direction normal to the horizontal plane as H R ,

the second antenna is arranged within a range from the highest position of the roof to 0.5×H R .

6. The antenna system for vehicles as claimed in claim 5 , wherein the second antenna is arranged in an aerodynamic body part attached to a vehicle exterior side relative to the rear glass.

7. The antenna system for vehicles as claimed in claim 6 , wherein the aerodynamic body part is a spoiler.

8. The antenna system for vehicles as claimed in claim 1 , wherein the second antenna is arranged on a vehicle interior side of the rear glass, and

wherein, denoting a distance from a lowest position of the rear glass to a highest position of the rear glass in the direction normal to the horizontal plane as H GR ,

the second antenna is arranged within a range from the highest position of the rear glass to 0.5×H GR .

9. The antenna system for vehicles as claimed in claim 1 , wherein at least one of the first antenna and the second antenna is a patch antenna.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (33)