# US 2025/0158291 A1 · Transparent rf metasurface for 5g antennas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0158291 A1 - Document ID: US20250158291A1 - Status: Published application - Kind: A1 - Application number: 18/941,113 - Filed: 2024-11-08 - Published: 2025-05-15 - Earliest claimed: 2023-11-09 - Applicants: Corning Incorporated - Inventors: Rocio Rodriguez Cano; Igor Aleksandrovich Syrytsin; Shuai Zhang - Web page: https://patentgrep.com/patent/US20250158291A1 ## CPC - H01Q 21/065: {Patch antenna array} - 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: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A communication device and method of forming the device are described. The device includes a mm Wave antenna on a substrate and glass cover protecting the substrate. A metasurface having a periodic set of unit cells is disposed on a surface of the substrate. A filter disposed between the unit cells has a sub-6 GHz passband. The metasurface has a structure that is designed to mitigate deleterious effects caused by the presence of the glass cover in close proximity to the mm Wave antenna. ## Claims ### Claim 1 A combined antenna structure comprising: a mmWave antenna configured to emit radiation in a mmWave band; a dielectric substrate separated from the mmWave antenna by a predetermined distance in a direction substantially perpendicular to a surface of a supporting substrate on which the mmWave antenna is disposed; and a conductive metasurface disposed on the dielectric substrate to cover the mmWave antenna in a plane substantially parallel to the surface of the supporting substrate, the metasurface comprising a substantially two-dimensional structure configured to mitigate effects of the dielectric substrate on a gain pattern of the mmWave antenna. ### Claim 2 (depends on 1) The combined antenna structure of claim 1, wherein the dielectric substrate comprises glass. ### Claim 3 (depends on 1) The combined antenna structure of claim 1, wherein the metasurface comprises periodic unit cells each having a main area with a cutout disposed therein. ### Claim 4 (depends on 3) The combined antenna structure of claim 3, wherein the cutout forms a plus sign whose legs end in a cross. ### Claim 5 (depends on 3) The combined antenna structure of claim 3, wherein adjacent unit cells are coupled together by a filter having a sub-6 GHz passband. ### Claim 6 (depends on 5) The combined antenna structure of claim 5, wherein the filter is a planar filter that comprises: a resistive portion formed by windings coupled to main areas of the adjacent unit cells, and a capacitive portion formed by a parallel plate capacitor disposed between the windings. ### Claim 7 (depends on 3) The combined antenna structure of claim 3, wherein the main area is formed from a solid conductor. ### Claim 8 (depends on 3) The combined antenna structure of claim 3, wherein the main area is formed by a mesh. ### Claim 9 (depends on 3) The combined antenna structure of claim 3, wherein multiple unit cells cover the mmWave antenna. ### Claim 10 (depends on 1) The combined antenna structure of claim 1, wherein the metasurface is formed on a surface of the dielectric substrate opposing the mmWave antenna. ### Claim 11 (depends on 1) The combined antenna structure of claim 1, wherein the metasurface is formed on a surface of the dielectric substrate parallel with a surface of the dielectric substrate opposing the mmWave antenna. ### Claim 12 (depends on 1) The combined antenna structure of claim 1, wherein, at an opposing surface of the dielectric substrate, a far-field gain pattern comprises no ripples over a spherical sector covering a range of azimuthal angles from 50° to 125°. ### Claim 13 (depends on 1) The combined antenna structure of claim 1, further comprising another antenna configured to operate at sub-6 GHz frequencies, the conductive metasurface configured to not interfere with operation of the other antenna. ### Claim 14 A modified dielectric structure comprising: a glass substrate; and a conductive metasurface disposed on the glass substrate, the metasurface comprising a substantially two-dimensional structure configured to mitigate effects of the glass substrate on a gain pattern of a mmWave antenna. ### Claim 15 (depends on 14) The modified dielectric structure of claim 14, wherein the metasurface comprises periodic unit cells each having a main area with a cutout disposed therein. ### Claim 16 (depends on 15) The modified dielectric structure of claim 15, wherein adjacent unit cells are coupled together by a planar filter having a sub-6 GHz passband, the planar filter comprising: a resistive portion formed by windings coupled to main areas of the adjacent unit cells, and a capacitive portion formed by a parallel plate capacitor disposed between the windings. ### Claim 17 (depends on 15) The modified dielectric structure of claim 15, wherein the main area is formed from a solid conductor. ### Claim 18 (depends on 15) The modified dielectric structure of claim 15, wherein the main area is formed by a mesh. ### Claim 19 A communication device comprising: a housing in which is disposed: a sub-6 GHz antenna configured to emit radiation in a sub-6 GHz band; a dielectric substrate on which a mmWave patch antenna configured to emit radiation in a mmWave band is disposed; and a processor configured control communications using the sub-6 GHz antenna and the mmWave patch antenna; a glass cover surrounded by the housing and separated from the dielectric substrate by a predetermined distance in a direction substantially perpendicular to a surface of the dielectric substrate on which the mmWave patch antenna is disposed; and a conductive metasurface disposed on the glass cover to cover the mmWave patch antenna in a plane substantially parallel to the surface of the dielectric substrate, the metasurface comprising a substantially two-dimensional structure configured to mitigate effects of the glass cover on a gain pattern of the mmWave patch antenna. ### Claim 20 (depends on 19) The communication device of claim 19, wherein the metasurface comprises periodic unit cells each having a main area with a cutout disposed therein, adjacent unit cells are coupled together by a filter having a sub-6 GHz passband.