# US 12,763,479 B2 · Electronic device with foot antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,479 B2 - Document ID: US12763479B2 - Status: Granted - Kind: B2 - Application number: 18/913,952 - Filed: 2024-10-11 - Published: 2026-04-16 - Granted: 2026-10-13 - Earliest claimed: 2024-10-11 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Menglou Rao; Louis K Chamberlain; Michael J Williams; Joel D Barrera; Ayoub Yari Boroujeni - Web page: https://patentgrep.com/patent/US12763479B2 ## CPC - H01Q 13/18: the slot being backed by, or formed in boundary wall of, a resonant cavity (longitudinally slotted cylinder H01Q13/12 ){; Open cavity antennas} - H01Q 1/22: by structural association with other equipment or articles - H01Q 1/48: Earthing means; Earth screens; Counterpoises - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An electronic device may include a housing and wireless circuitry. The housing may include a conductive body mounted to a dielectric foot. The wireless circuitry may include wedge-shaped cavity-backed antennas mounted within the dielectric foot. Each antenna may include a dielectric wall, a conductive plate, and a conductive cavity mounted to the conductive plate. The conductive cavity and the conductive plate may define edges of an antenna cavity. The dielectric wall may be mounted to the conductive plate and the conductive cavity overlapping the antenna cavity. The dielectric wall may have an outer surface with a continuous curvature that matches a curvature of the dielectric foot. The dielectric wall may have an inner surface facing the antenna cavity. An antenna resonating element may be mounted to the inner surface. The antenna resonating element may include planar segments separated by folds to help approximate the continuous curvature of the outer surface. ## Claims ### Claim 1 An electronic device comprising: a housing that includes a dielectric foot and a conductive body, wherein the dielectric foot includes a first wall coupled to the conductive body, a second wall parallel to the first wall, and a sidewall that couples the first wall to the second wall and that is curved around a central axis of the electronic device; and an antenna mounted to the second wall within the dielectric foot, wherein the antenna includes a conductive plate, a conductive cavity mounted to the conductive plate, a dielectric wall mounted to the conductive plate and the conductive cavity, wherein the dielectric wall has a first surface facing and curved parallel to the sidewall of the dielectric foot, and an antenna resonating element mounted to a second surface of the dielectric wall that faces the conductive cavity. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein the second wall is configured to rest on a surface, the sidewall extending at a non-parallel angle from an outer peripheral edge of the second wall to an inner peripheral edge of the first wall. ### Claim 3 (depends on 2) The electronic device of claim 2, wherein the non-parallel angle is non-perpendicular with respect to the first and second walls. ### Claim 4 (depends on 3) The electronic device of claim 3, further comprising: intake vents in the sidewall of the dielectric foot; and exhaust vents in the sidewall of the dielectric foot, wherein the dielectric wall overlaps at least some of the intake vents. ### Claim 5 (depends on 1) The electronic device of claim 1, wherein the conductive cavity comprises a folded piece of sheet metal. ### Claim 6 (depends on 5) The electronic device of claim 5, wherein the folded piece of sheet metal comprises a first conductive wall opposite the conductive plate and a second conductive wall that extends from the first conductive wall to the conductive plate opposite the dielectric wall. ### Claim 7 (depends on 6) The electronic device of claim 6, wherein the second conductive wall comprises a conductive lip that is welded to a lateral periphery of the conductive plate. ### Claim 8 (depends on 1) The electronic device of claim 1, further comprising: a system ground in the conductive body; and a ring of conductive adhesive that couples the conductive plate to the system ground in the conductive body. ### Claim 9 (depends on 1) The electronic device of claim 1, wherein the second surface of the dielectric wall comprises a recess and the electronic device further comprises: a layer of adhesive that adheres the antenna resonating element to the second surface of the dielectric wall within the recess. ### Claim 10 (depends on 9) The electronic device of claim 9, wherein the second surface comprises first, second, and third portions within the recess, the first portion is non-parallel to the second portion, and the third portion is non-parallel to the first and second portions. ### Claim 11 (depends on 10) The electronic device of claim 10, wherein the antenna resonating element comprises first, second, and third segments, the first segment overlaps the first portion of the second surface and is non-parallel to the second segment, the second segment overlaps the second portion of the second surface and is non-parallel to the third segment, and the third segment overlaps the third portion of the second surface. ### Claim 12 (depends on 11) The electronic device of claim 11, wherein the antenna resonating element comprises a first alignment hole in the first segment, a second alignment hole in the second segment, and a third alignment hole in the third segment, the dielectric wall comprising: a first alignment pin on the first portion of the second surface and protruding through the first alignment hole in the first segment; a second alignment pin on the second portion of the second surface and protruding through the second alignment hole in the second segment; and a third alignment pin on the third portion of the second surface and protruding through the third alignment pin in the third segment. ### Claim 13 (depends on 12) The electronic device of claim 12, wherein the first alignment hole comprises a first elongated alignment hole having a first longitudinal axis, the second alignment hole comprises a second elongated alignment hole having a second longitudinal axis orthogonal to the first longitudinal axis, and the third alignment hole comprises a third elongated alignment hole extending parallel to the first longitudinal axis, the first alignment pin comprises first crush ribs orthogonal to the first longitudinal axis, the second alignment pin comprises second crush ribs orthogonal to the second longitudinal axis, and the third alignment pin comprises third crush ribs. ### Claim 14 (depends on 1) The electronic device of claim 1, wherein the conductive plate comprises a laser etched region that laterally surrounds a non-laser-etched region of the conductive plate, the antenna further comprises a return path that couples the antenna resonating element to the conductive plate within the non-laser-etched region of the conductive plate, and the antenna further comprises a solder ball that couples the return path to the non-laser-etched region of the conductive plate. ### Claim 15 An antenna comprising: a grounded plate; folded sheet metal mounted to the grounded plate, wherein the grounded plate and the folded sheet metal surround a cavity having an open end; a dielectric wall that is mounted to the folded sheet metal and the grounded plate and that overlaps the open end of the cavity; a resonating element mounted to the dielectric wall within the cavity, wherein the resonating element includes a first segment, a second segment coupled to the first segment at a first fold of the antenna resonating element, and a third segment coupled to the second segment at a second fold of the antenna resonating element; and a return path that couples the antenna resonating element to the grounded conductive plate. ### Claim 16 (depends on 15) The antenna of claim 15, wherein: the second segment is planar and non-parallel to the first segment, the third segment is planar and non-parallel to the first and second segments, the dielectric wall has a surface facing the cavity, the first segment is mounted to a first portion of the surface that extends parallel to the first segment, the second segment is mounted to a second portion of the surface that extends parallel to the second segment, and the third segment is mounted to a third portion of the surface that extends parallel to the third segment. ### Claim 17 (depends on 16) The antenna of claim 16, wherein the dielectric wall has an additional surface opposite the surface, the additional surface being continuously curved across a length of the antenna resonating element. ### Claim 18 (depends on 16) The antenna of claim 16, further comprising: a first alignment hole in the first segment and extending along a first longitudinal axis; a second alignment hole in the second segment and extending along a second longitudinal axis orthogonal to the first longitudinal axis; a first alignment pin on the dielectric wall and extending through the first alignment hole; and a second alignment pin on the dielectric wall and extending through the second alignment hole. ### Claim 19 An electronic device comprising: a housing that includes a first wall, a second wall parallel to the first wall, and a third wall that is curved and that couples the first wall to the second wall; and an antenna mounted to the second wall within the housing, wherein the antenna includes a conductive plate, a conductive cavity mounted to the conductive plate, a dielectric wall mounted to the conductive plate, wherein the dielectric wall has a first surface facing the third wall and extending parallel to the third wall, and an antenna resonating element mounted to a second surface of the dielectric wall opposite the first surface. ### Claim 20 (depends on 1) The electronic device of claim 1, wherein: the sidewall is curved around a central axis of the electronic device, and the sidewall extends at a non-parallel angle from an outer peripheral edge of the second wall to an inner peripheral edge of the first wall.