# US 12,183,974 B2 · Slot antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,974 B2 - Document ID: US12183974B2 - Status: Granted - Kind: B2 - Application number: 18/073,157 - Filed: 2022-12-01 - Published: 2023-08-24 - Granted: 2024-12-31 - Earliest claimed: 2022-02-24 - Assignees: DENSO TEN Limited - Applicants: DENSO TEN Limited - Inventors: Kenji Kawai; Kazushige Ogino; Tetsuro Okano; Kakeru Yamashita - Web page: https://patentgrep.com/patent/US12183974B2 ## CPC - H01Q 13/10: Resonant slot antennas - H01Q 13/106: {Microstrip slot antennas (patch antenna elements H01Q9/0407)} - H01Q 1/3275: {mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk} - H01Q 1/50: Structural association of antennas with earthing switches, lead-in devices or lightning protectors - H01Q 5/25: Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A slot antenna includes: power-supply points; and a slot, wherein in the slot antenna, the power-supply points are arranged while interposing the slot therebetween in a shorter direction of the slot, the slot being an opening that is provided in a metal sheet constituting an outer panel of a vehicle, and a width along the shorter direction of the slot is larger in each of both end parts of the slot than in an intermediate part of the slot in a longitudinal direction of the slot. ## Claims ### Claim 1 A slot antenna comprising: power-supply points; and a slot, wherein in the slot antenna, the power-supply points are arranged while interposing the slot therebetween in a shorter direction of the slot, the slot being an opening that is provided in a metal sheet constituting an outer panel of a vehicle, and a width along the shorter direction of the slot is larger in each of both end parts of the slot than in an intermediate part of the slot in a longitudinal direction of the slot. ### Claim 2 (depends on 1) The slot antenna according to claim 1, wherein the power-supply points are displaced from a center of the slot in the longitudinal direction. ### Claim 3 (depends on 1) The slot antenna according to claim 1, wherein the power-supply point is capacity-coupled to the slot. ### Claim 4 (depends on 1) The slot antenna according to claim 1 further comprising: an electric conductive plate that is arranged to be flush with the outer panel such that the electric conductive plate divides a region inside of the opening of the outer panel in a planar view into both end parts in a longitudinal direction of the region, and is electrically connected to the metal sheet, wherein the electric conductive plate includes a slit that connects both end parts of the opening, and the slot is constituted of both of the end parts and the slit that connects both of the end parts. ### Claim 5 (depends on 1) The slot antenna according to claim 1 further comprising: an electric conductive plate that is arranged to be flush with the outer panel such that the electric conductive plate divides a region inside of the opening of the outer panel in a planar view into both end parts in a longitudinal direction of the region, and is electrically connected to the metal sheet, wherein the electric conductive plate is arranged to form a gap between the electric conductive plate and a periphery of the opening to connect both of the end parts, and the slot is constituted of both of the end parts and the gap. ### Claim 6 (depends on 1) The slot antenna according to claim 1 further comprising: an electric conductive plate that is arranged to be flush with the outer panel such that the electric conductive plate divides a region inside of the opening of the outer panel in a planar view into both end parts in a longitudinal direction of the region, and is electrically connected to the metal sheet, wherein the electric conductive plate is arranged to form a gap connected with one of both of the end parts from a periphery of the opening, and includes a slit that connects another of both of the end parts and the gap, and the slot is constituted of both of the end parts, the gap, and the slit. ### Claim 7 (depends on 4) The slot antenna according to claim 4, wherein the electric conductive plate is arranged in the opening such that lengths of both of the end parts along a longitudinal direction of the opening are different from each other. ### Claim 8 (depends on 4) The slot antenna according to claim 4, wherein the power-supply point is arranged to be displaced from a center in a longitudinal direction of the slit of the electric conductive plate. ### Claim 9 (depends on 4) The slot antenna according to claim 4, wherein a plurality of electric conductive plates each including the slit is separately arranged in a longitudinal direction of the opening. ### Claim 10 (depends on 4) The slot antenna according to claim 4 further includes: a planar antenna that is arranged in the opening such that the planar antenna is flush with the outer panel along with the electric conductive plate. ### Claim 11 (depends on 10) The slot antenna according to claim 10, wherein the planar antenna is such that at least a part of the planar antenna is overlapped with the electric conductive plate in the top view in a state where the electric conductive plate is arranged in an inner part of the vehicle. ### Claim 12 (depends on 1) The slot antenna according to claim 1, wherein the opening is provided in a metal sheet constituting a roof of the vehicle. ### Claim 13 (depends on 12) The slot antenna according to claim 12, wherein the longitudinal direction of the slot is arranged along a width direction of the vehicle. ### Claim 14 (depends on 13) The slot antenna according to claim 13, wherein the slot antenna receives an electric wave within a band of Frequency Modulation (FM) radio broadcasting. ### Claim 15 A slot antenna comprising: power-supply points; and a slot, wherein in the slot antenna, the power-supply points are arranged while interposing the slot therebetween in a shorter direction of the slot, and the slot is a dumbbell-shaped opening that is provided in the metal sheet constituting the outer panel of the vehicle. ### Claim 16 (depends on 15) The slot antenna according to claim 15, wherein the slot is an opening that is provided in a metal sheet constituting a roof of the vehicle. ### Claim 17 (depends on 16) The slot antenna according to claim 16, wherein the longitudinal direction of the slot is arranged along a width direction of the vehicle. ### Claim 18 (depends on 17) The slot antenna according to claim 17, wherein the slot antenna receives an electric wave within a band of FM radio broadcasting.