# US 12,218,401 B2 · Dielectric covers for antennas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,401 B2 - Document ID: US12218401B2 - Status: Granted - Kind: B2 - Application number: 17/400,710 - Filed: 2021-08-12 - Published: 2021-12-02 - Granted: 2025-02-04 - Earliest claimed: 2017-09-27 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Jiangfeng Wu; Siwen Yong; Yi Jiang; Lijun Zhang; Mattia Pascolini - Web page: https://patentgrep.com/patent/US12218401B2 ## CPC - H01Q 1/12: Supports; Mounting means - H01Q 1/421: {Means for correcting aberrations introduced by a radome} - H01Q 3/34: by electrical means (active lenses or reflecting arrays H01Q3/46) - H01Q 19/062: {for focusing} - H05K 5/03: Covers - H05K 9/00: Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00) - H01Q 3/28: varying the amplitude - H01Q 3/38: the phase-shifters being digital - H01Q 21/065: {Patch antenna array} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An electronic device may be provided with wireless communications circuitry and control circuitry. The wireless communications circuitry may include centimeter and millimeter wave transceiver circuitry and a phased antenna array. A dielectric cover may be formed over the phased antenna array. The phased antenna array may transmit and receive wireless radio-frequency signals through the dielectric cover. The dielectric cover may have first and second opposing surfaces. The second surface may face the phased antenna array and may have a curvature. The curvature of the second surface may include one or more recessed regions of the dielectric cover. The one or more recessed regions of the second surface may serve to maximize and broaden the coverage area for the phased antenna array. The first surface may be conformal to other structures in the electronic device. ## Claims ### Claim 1 A headset device comprising: a housing; a display mounted to the housing, having an active area containing an array of pixels, and having an inactive border region free of pixels; a substrate in the housing and having a surface; a phased antenna array mounted under the inactive border region of the display and having a plurality of antenna elements disposed on the surface of the substrate; and a radome formed from a portion of the housing and having an outer surface and an inner surface between the outer surface and the plurality of antenna elements, the outer surface of the radome being a curved surface, wherein the phased antenna array is operable to convey wireless radio-frequency signals as a signal beam through the radome, the radome has a first thickness in a first portion overlapping each antenna element in the plurality of antenna elements and a second thickness different than the first thickness in a second portion adjacent to the first portion, the phased antenna array and the substrate are separated from the radome by an air gap across an area of the radome that overlaps the phased antenna array and the substrate, the radome comprises a first layer of material and a second layer of material that is attached to the first layer of material, the first layer of material comprises glass, and the second layer of material comprises plastic. ### Claim 2 (depends on 1) The headset device defined in claim 1, wherein the first layer of material at least partly defines a curvature of the outer surface and the second layer of material at least partly defines a curvature of the inner surface. ### Claim 3 (depends on 1) The headset device defined in claim 1, wherein the air gap separates the phased antenna array and the substrate from the inner surface of the radome. ### Claim 4 (depends on 1) The headset device defined in claim 1, wherein the radome includes a plurality of recesses at the inner surface each overlapping a corresponding one of the plurality of antenna elements. ### Claim 5 (depends on 1) The headset device defined in claim 1, wherein the substrate is a flexible substrate. ### Claim 6 (depends on 1) The headset device defined in claim 1, wherein the headset device is a virtual reality headset device. ### Claim 7 (depends on 1) The headset device defined in claim 1, wherein the headset device is an augmented reality headset device. ### Claim 8 A headset device comprising: a housing; a display mounted to the housing, having an active area containing an array of pixels, and having an inactive border region free of pixels; a substrate in the housing and having a surface; a phased antenna array mounted under the inactive border region of the display and having a plurality of antenna elements disposed on the surface of the substrate; and a radome formed from a portion of the housing and having an outer surface and an inner surface between the outer surface and the plurality of antenna elements, the outer surface of the radome being a curved surface, wherein the phased antenna array is operable to convey wireless radio-frequency signals as a signal beam through the radome, the radome has a first thickness in a first portion overlapping each antenna element in the plurality of antenna elements and a second thickness different than the first thickness in a second portion adjacent to the first portion, the phased antenna array and the substrate are separated from the radome by an air gap across an area of the radome that overlaps the phased antenna array and the substrate, and the radome includes a plurality of recesses at the inner surface each overlapping a corresponding one of the plurality of antenna elements. ### Claim 9 (depends on 8) The headset device defined in claim 8, wherein the radome comprises a first layer of material and a second layer of material that is attached to the first layer of material. ### Claim 10 (depends on 8) The headset device defined in claim 8, wherein the substrate is a flexible substrate. ### Claim 11 (depends on 8) The headset device defined in claim 8, wherein the headset device is a virtual reality headset device. ### Claim 12 (depends on 8) The headset device defined in claim 8, wherein the headset device is an augmented reality headset device.