# US 12,603,437 B2 · Antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,437 B2 - Document ID: US12603437B2 - Status: Granted - Kind: B2 - Application number: 18/570,070 - Filed: 2021-12-28 - Published: 2024-08-15 - Granted: 2026-04-14 - Earliest claimed: 2021-06-23 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Takashi Kawamura - Web page: https://patentgrep.com/patent/US12603437B2 ## CPC - H01Q 9/28: Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines (waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00) - H01Q 1/04: Adaptation for subterranean or subaqueous use - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna for wireless communication via a lossy medium, a structure thereof is optimized to improve transmission characteristics such as a transmission coefficient. The antenna includes at least one pair of electrodes and a sheath portion. The sheath portion includes a wiring electrically connecting each of the at least one pair of electrodes and a corresponding power supply terminal. The sheath portion is also referred to as a sheath. In this antenna, a minimum diameter of the electrode is larger than a width of the wiring included in the sheath portion. A shape of each of the at least one pair of electrodes is, for example, substantially spherical. ## Claims ### Claim 1 An antenna comprising: a first pair of electrodes, and a first sheath portion enclosing first wiring that electrically connects each of the first pair of electrodes and a corresponding first pair of power supply terminals; wherein a minimum diameter of each of the first pair of electrodes is larger than a width of the first wiring, and wherein a center point of each of the first pair of electrodes and a center axis of a part of the first wiring are arranged on a first common line, and wherein the first sheath portion is configured to extend substantially along the first common line. ### Claim 2 (depends on 1) The antenna according to claim 1, wherein a distance between the first pair of electrodes is longer than a minimum diameter of each of the first pair of electrodes. ### Claim 3 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes has a substantially spherical shape. ### Claim 4 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes has a spheroidal shape. ### Claim 5 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes has a polyhedral shape. ### Claim 6 (depends on 1) The antenna according to claim 1, wherein the first sheath portion includes air therein. ### Claim 7 (depends on 1) The antenna according to claim 1, wherein the first sheath portion includes pure water therein. ### Claim 8 (depends on 1) The antenna according to claim 1, wherein the first sheath portion includes a material therein having conductivity of less than 1 S/m. ### Claim 9 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes includes a coating film on a surface thereof. ### Claim 10 (depends on 9) The antenna according to claim 9, wherein a magnitude of impedance at an operating frequency between each of the first pair of electrodes and an external medium is smaller than an impedance in a case where the coating film is not included. ### Claim 11 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes includes a material therein having conductivity of less than 1 S/m. ### Claim 12 (depends on 1) The antenna according to claim 1, wherein each of the first pair of electrodes includes a cavity therein. ### Claim 13 (depends on 12) The antenna according to claim 12, wherein each of the first pair of electrodes includes at least one hole penetrating the cavity. ### Claim 14 (depends on 1) The antenna according to claim 1, further comprising a transformer in which a number of windings of a coil connected to the first pair of power supply terminals is smaller than a number of windings of another coil. ### Claim 15 (depends on 1) The antenna according to claim 1, further comprising a switching-type power amplifier connected to the first pair of power supply terminals. ### Claim 16 (depends on 1) The antenna according to claim 1, wherein a center axis of the first wiring is arranged on the first common line. ### Claim 17 (depends on 1) The antenna according to claim 1, further comprising a second pair of electrodes; and a second sheath portion enclosing second wiring that electrically connects each of the second pair of electrodes and a corresponding second pair of power supply terminals, wherein a minimum diameter of each of the second pair of electrodes is larger than a width of the second wiring, wherein a center point of each of the second pair of electrodes and a center axis of the second wiring are arranged on a second common line that is orthogonal to the first common line, wherein the second sheath portion is configured to extend substantially along the second common line, wherein a distance between the second pair of electrodes is longer than a minimum diameter of each of the second pair of electrodes, and wherein each of the second pair of electrodes has one of a substantially spherical shape, a spheroidal shape or a polyhedral shape. ### Claim 18 (depends on 17) The antenna according to claim 17, wherein a center axis of the second sheath portion is arranged on the second common line.