US 12,003,021 B2
Antenna system
Shoichi Takeuchi, Tokyo (JP); and Hideaki Shoji, Tokyo (JP)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on May 17, 2021, as Appl. No. 17/322,153.
Application 17/322,153 is a continuation of application No. PCT/JP2019/045393, filed on Nov. 20, 2019.
Claims priority of application No. 2018-219406 (JP), filed on Nov. 22, 2018.
Prior Publication US 2021/0273321 A1, Sep. 2, 2021
Int. Cl. H01Q 1/32 (2006.01); B32B 7/12 (2006.01); B32B 17/10 (2006.01)
CPC H01Q 1/325 (2013.01) [B32B 7/12 (2013.01); B32B 17/10165 (2013.01); B32B 2457/00 (2013.01); B32B 2605/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An antenna system, comprising:
a glass plate with a thickness of 1.1 mm or more;
a resin layer in contact with one principal surface of the glass plate; and
an antenna located on an opposite side of the resin layer from a side where the glass plate is located, the antenna being spaced apart from the resin layer,
wherein a predetermined frequency of 3 GHz or greater is defined as F, a transmission coefficient S21 of the glass plate alone with respect to an incident electromagnetic wave of the frequency F is defined as S21G [dB], a transmission coefficient S21 of a laminate including the glass plate and the resin layer with respect to the incident electromagnetic wave of the frequency F is defined as S21GR [dB], a frequency closest to the frequency F among frequencies of incident electromagnetic waves at which the transmission coefficient S21 of the glass plate alone becomes a local maximum is defined as FP, a transmission coefficient S21 of the glass plate alone with respect to an incident electromagnetic wave of the frequency FP is defined as S21GP [dB], a frequency closest to the frequency F among frequencies of incident electromagnetic waves at which the transmission coefficient S21 of the glass plate alone becomes a local minimum is defined as Fv, and a transmission coefficient S21 of the glass plate alone with respect to an incident electromagnetic wave of the frequency FV is defined as S21GV [dB],
wherein a thickness of the resin layer is configured such that:
S21GR−S21G≥(S21GP−S21GV)×0.2, and
wherein the antenna is supported by a bracket, and a material of the bracket includes a same material as in the resin layer.