# US 11,444,367 B2 · Glass-mounted antenna package for a motor vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,367 B2 - Document ID: US11444367B2 - Status: Granted - Kind: B2 - Application number: 16/990,001 - Filed: 2020-08-11 - Published: 2022-02-17 - Granted: 2022-09-13 - Earliest claimed: 2020-08-11 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Timothy Brockett; Hyok Jae Song; James H. Schaffner; Duane S. Carper; Raymond G. Acker - Web page: https://patentgrep.com/patent/US11444367B2 ## CPC - H01Q 1/1271: {for mounting on windscreens} - H01Q 1/38: 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)} - H01Q 5/50: Feeding or matching arrangements for broad-band or multi-band operation - H01Q 9/0421: {with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence)} - H01Q 9/0428: {radiating a circular polarised wave} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna assembly configured to be mounted on a glass structure. The antenna assembly comprises a multilayer structure comprising i) a superstrate layer comprising a thin dielectric material; ii) an antenna layer on which the superstrate layer is disposed, the antenna layer comprising an electrically conducting material; and ii) a first substrate layer on which the antenna layer is disposed. The antenna assembly further comprises a housing in which the multilayer structure is disposed. The housing is adapted for attachment to a surface of the glass structure. A dielectric characteristic of the superstrate layer compensates for a dielectric characteristic of the glass structure in order to reduce the variability of the operating frequency of the antenna assembly. ## Claims ### Claim 1 An antenna assembly configured to be mounted on a glass structure comprising: a multilayer structure comprising a superstrate layer formed of a dielectric material having at least one of a uniform structure or a thickness such that the superstrate layer compensates for a dielectric characteristic of the glass structure and reduces variability of an operating frequency of the antenna assembly, the thickness being less than a thickness of a glass layer of the glass structure, an antenna layer on which the superstrate layer is disposed, the antenna layer comprising an electrically conducting material, and a first substrate layer on which the antenna layer is disposed; and a housing in which the multilayer structure is disposed, the housing configured to be attached to a surface of the glass structure. ### Claim 2 (depends on 1) The antenna assembly of claim 1, wherein: the first substrate layer comprises a first surface and a second surface opposite the first surface; and the antenna layer is disposed on the first surface of the first substrate layer. ### Claim 3 (depends on 2) The antenna assembly of claim 2, further comprising a ground plane disposed on the second surface of the first substrate layer. ### Claim 4 (depends on 3) The antenna assembly of claim 3, further comprising a second substrate layer disposed on the ground plane. ### Claim 5 (depends on 4) The antenna assembly of claim 4, wherein the second substrate layer is configured for a plurality of electronic components to be mounted on the second substrate layer. ### Claim 6 (depends on 5) The antenna assembly of claim 5, wherein the second substrate layer comprises a plurality of conductive vias connecting a surface of the second substrate layer to the ground plane. ### Claim 7 (depends on 6) The antenna assembly of claim 6, wherein the second substrate layer further comprises an RF connector configured to connect a feed cable to the antenna assembly. ### Claim 8 (depends on 7) The antenna assembly of claim 7, further comprising a metal conductor that passes through the second substrate layer, the ground plane, and the first substrate layer, the metal conductor connecting the feed cable to the antenna layer and impedance matching the antenna layer to the feed cable. ### Claim 9 (depends on 8) The antenna assembly of claim 8, wherein the antenna layer comprises a truncated corner patch antenna. ### Claim 10 (depends on 9) The antenna assembly of claim 9, wherein the truncated corner patch antenna is a circular polarized antenna. ### Claim 11 (depends on 8) The antenna assembly of claim 8, wherein: the antenna layer comprises a patch antenna; the metal conductor is offset from a center of the patch antenna; and an end of the metal conductor contacts the patch antenna. ### Claim 12 (depends on 1) The antenna assembly of claim 1, wherein the superstrate layer maintains the operating frequency of the antenna assembly at 2.3 giga-hertz. ### Claim 13 (depends on 1) The antenna assembly of claim 1, wherein the superstrate layer is 0.254 millimeters thick. ### Claim 14 (depends on 1) The antenna assembly of claim 1, wherein: the multilayer structure further comprises a ground plane on which the first substrate layer is disposed, and a second substrate layer on which the ground plane is disposed; the first substrate layer is 3.175 millimeters thick; and the second substrate layer is 3.175 millimeters thick. ### Claim 15 (depends on 1) The antenna assembly of claim 1, wherein: the antenna layer comprises a patch antenna; and the patch antenna contacts the superstrate layer. ### Claim 16 (depends on 1) The antenna assembly of claim 1, wherein the housing has an open side facing the glass structure and allows the superstrate layer to contact the glass structure when the housing is mounted on the glass structure. ### Claim 17 (depends on 1) A window assembly comprising: the antenna assembly of claim 1; and the glass structure comprising a first glass layer, wherein the housing is mounted on the first glass layer and has an opening facing the first glass layer, and the superstrate layer contacts the first glass layer in the opening of the housing. ### Claim 18 (depends on 17) The window assembly of claim 17, wherein: the antenna layer comprises a patch antenna; the glass structure comprises a plurality of glass layers and an infrared layer; the infrared layer comprises a radiation cutout adjacent to and facing the patch antenna; and the patch antenna is configured to receive a radio frequency signal through the radiation cutout of the infrared layer. ### Claim 19 An antenna assembly configured to be mounted on a glass structure comprising: a multilayer structure comprising a first substrate, a truncated corner patch antenna that is circular polarized and disposed on the first substrate and comprising an electrically conductive material; and a superstrate layer disposed on the truncated corner patch antenna and formed of a dielectric material, wherein the dielectric material has at least one of a uniform structure or a thickness such that the superstrate layer compensates for a dielectric characteristic of the glass structure and reduces variability of an operating frequency of the antenna assembly, the thickness being less than a thickness of a glass layer of the glass structure; and a housing in which the multilayer structure is disposed, the housing configured to be attached to a surface of the glass structure. ### Claim 20 (depends on 19) The antenna assembly of claim 19, wherein the housing has an open side facing the glass structure and allows the superstrate layer to contact the glass structure when the housing is mounted on the glass structure.