# US 11,079,485 B2 · Antenna device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,485 B2 - Document ID: US11079485B2 - Status: Granted - Kind: B2 - Application number: 16/911,271 - Filed: 2020-06-24 - Published: 2020-10-15 - Granted: 2021-08-03 - Earliest claimed: 2017-12-26 - Assignees: Denso Corporation - Applicants: Denso Corporation - Inventors: Kazuhiro Aoki - Web page: https://patentgrep.com/patent/US11079485B2 ## CPC - G01S 13/878: {Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector (G01S13/874 takes precedence)} - H01Q 21/0037: {linear waveguide fed arrays} - G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver - G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46) - H01Q 1/3233: {particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems} - H01Q 21/06: Arrays of individually energised antenna units similarly polarised and spaced apart - H01Q 21/065: {Patch antenna array} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract Transmission antennas are aligned at a reference distance along a preset direction of alignment. The aperture width of a first reception antenna in the direction of alignment is set to a first width which is less than the reference distance. Second reception antennas each have an aperture width in the direction of alignment set to a second width which is the first width or less and are aligned at a distance which is less than the reference distance along the direction of alignment. The distance between the position of the center of the first reception antenna and the phase center of a second reception antennal located closest to the first reception antenna among the second reception antennas is set to a length that is greater than or equal to the value obtained by multiplying the reference distance by the value obtained by subtracting 1 from the number of transmission antennas. ## Claims ### Claim 1 An antenna device comprising: a plurality of transmission antennas aligned at a reference distance along a direction of alignment, the reference distance and the direction of alignment being preset; a first reception antenna having an aperture width in the direction of alignment set to a first width which is less than the reference distance; and a plurality of second reception antennas each having an aperture width in the direction of alignment set to a second width which is less than or equal to the first width, the plurality of second reception antennas being aligned at a distance which is less than the reference distance along the direction of alignment, wherein a distance along the direction of alignment between a phase center of the first reception antenna and a phase center of a second reception antenna located closest to the first reception antenna among the plurality of second reception antennas is set to a length that is greater than or equal to a value obtained by multiplying the reference distance by a value obtained by subtracting 1 from a total number of the plurality of transmission antennas. ### Claim 2 (depends on 1) The antenna device according to claim 1, wherein the plurality of second reception antennas are arranged so that a circumscribed geometric shape of the plurality of second reception antennas has an area equal to an area of the first reception antenna. ### Claim 3 (depends on 1) The antenna device according to claim 1, wherein the plurality of transmission antennas are arranged so that when viewed in the direction of alignment, a phase center of each of the plurality of transmission antennas is located between a position of a center of the first reception antenna and a position of a center of the second reception antenna located closest to the first reception antenna among the plurality of second reception antennas. ### Claim 4 (depends on 1) The antenna device according to claim 1, further comprising an additional reception antenna having the same shape as the first reception antenna, wherein the additional reception antenna is disposed at a position defined by shifting the first reception antenna in a direction orthogonal to the direction of alignment. ### Claim 5 (depends on 4) The antenna device according to claim 4, wherein the additional reception antenna is disposed at a position defined by shifting the first reception antenna a distance greater than or equal to the reference distance in the direction of alignment. ### Claim 6 (depends on 5) The antenna device according to claim 5, wherein an amount of shifting for the additional reception antenna in the direction orthogonal to the direction of alignment is set less than an aperture width of the first reception antenna in the direction orthogonal to the direction of alignment. ### Claim 7 (depends on 1) The antenna device according to claim 1, wherein wherein the plurality of transmission antennas are positioned between the first reception antenna and the plurality of second reception antennas in the direction of alignment.