US 12,009,571 B2
Window glass for vehicle
Tsuyoshi Yamamoto, Tokyo (JP); Satoshi Tokunaga, Tokyo (JP); and Haruto Sanda, Tokyo (JP)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Jul. 29, 2022, as Appl. No. 17/877,403.
Claims priority of application No. 2021-128375 (JP), filed on Aug. 4, 2021.
Prior Publication US 2023/0045425 A1, Feb. 9, 2023
Int. Cl. H01Q 1/12 (2006.01); B60J 1/00 (2006.01); H01Q 1/32 (2006.01)
CPC H01Q 1/1278 (2013.01) [B60J 1/002 (2013.01); H01Q 1/3208 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A window glass for vehicle, comprising:
a glass plate and
an antenna provided to the glass plate and capable of receiving electromagnetic waves of AM broadcasting and FM broadcasting, wherein
the antenna comprises an antenna element and a feeding portion electrically connected to the antenna element,
the antenna element lies at a distance of longer than 20 mm from a metallic portion of the vehicle when the glass plate is in a vehicle-mounted state where the glass plate has been attached to a vehicle,
the antenna element comprises at least one horizontal portion extending in an approximately horizontal direction in the vehicle-mounted state,
the horizontal portion has an open end or has a bent portion bending apart therefrom which has an open end, and
the horizontal portion has a total element length that is at least ¾ of an overall length of the antenna element, wherein the window glass further comprises an amplifier having a regulated gain connected to the feeding portion of the antenna and wherein the antenna element has a capacity of 5 pF or higher and 30 pF or lower in a frequency range of 500 kHz to 1,500 kHz connected to an input terminal of the amplifier, wherein said antenna is the only antenna on the window glass.