# US 12,191,573 B2 · Antenna apparatus and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,573 B2 - Document ID: US12191573B2 - Status: Granted - Kind: B2 - Application number: 17/985,551 - Filed: 2022-11-11 - Published: 2023-03-02 - Granted: 2025-01-07 - Earliest claimed: 2020-05-12 - Assignees: Xidian University; Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Xidian University; Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Shuai Zhang; Nan Huang; Zhengdong Yong; Bao Lu - Web page: https://patentgrep.com/patent/US12191573B2 ## CPC - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 21/08: the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)} - H01Q 1/243: {with built-in antennas} - H01Q 1/523: {between antennas of an array} - H01Q 9/0414: {in a stacked or folded configuration} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract Provided are an antenna apparatus and an electronic device. The antenna apparatus comprises a plurality of antenna units, spaced from each other; a plurality of decoupling networks, corresponding to the plurality of antenna units one to one; and a decoupling transmission line. Each of the decoupling networks comprises a first transmission line and a second transmission line; an end of the first transmission line is configured to be connected to a radio-frequency chip, the other end of the first transmission line is connected to an end of the second transmission line, a decoupling port is formed at a joint between the other end of the first transmission line and the end of the second transmission line, and the other end of the second transmission line is connected to a corresponding antenna unit; and the decoupling transmission lines is connected between adjacent decoupling ports. The electronic device comprises the antenna apparatus. ## Claims ### Claim 1 An antenna apparatus, comprising: a plurality of antenna units, spaced from each other; a plurality of decoupling networks, corresponding to the plurality of antenna units one to one, wherein each of the decoupling networks comprises: a first transmission line, an end of the first transmission line being configured to be connected to a radio frequency (RF) chip; and a second transmission line, the other end of the first transmission line being connected to an end of the second transmission line, a decoupling port being formed at a joint between the other end of the first transmission line and the end of the second transmission line, and the other end of the second transmission line being connected to a corresponding antenna unit; and a decoupling transmission line, connected between adjacent decoupling ports, wherein a length of the decoupling transmission line is determined based on a phase of an initial isolation degree between each two adjacent antenna units of the plurality of antenna units, and the initial isolation degree is an isolation degree when the adjacent antenna units are not connected to the decoupling networks; the decoupling transmission line comprises a first segment, a second segment, a third segment, a fourth segment and a fifth segment connected in sequence; a width of the first segment is the same with a width of the fifth segment, and a width of the second segment is the same with a width of the fourth segment; the width of the first segment is less than the width of the second segment, and the width of the second segment is less than a width of the third segment; and a width of the fifth segment is less than the width of the fourth segment, and the width of the fourth segment is less than the width of the third segment. ### Claim 2 (depends on 1) The antenna apparatus according to claim 1, further comprising: a first substrate, the plurality of antenna units being arranged on the first substrate; a second substrate; and a third substrate, the plurality of decoupling networks and the decoupling transmission line are arranged in the third substrate; wherein the first substrate, the second substrate, and the third substrate are stacked in sequence. ### Claim 3 (depends on 2) The antenna apparatus according to claim 2, further comprising: a plurality of feeders, corresponding to the plurality of antenna units one to one, each of the plurality of feeders comprises: a first feeder; and a second feeder; wherein each of the plurality of decoupling networks is connected between the first feeder and the second feeder; wherein an end of the first feeder is arranged on a side of the third substrate away from the second substrate to be connected to the RF chip, and the other end of first feeder extends into the third substrate to be connected to the first transmission line, such that the first transmission line is connected to the RF chip; wherein a part of the second feeder is arranged in the third substrate to be connected to the second transmission line, and the other part of the second feeder penetrates through the second substrate, such that the second transmission line is connected to the corresponding antenna unit. ### Claim 4 (depends on 2) The antenna apparatus according to claim 2, wherein the third substrate has a multi-layer structure, the decoupling transmission line is arranged on a layer of the third substrate, the first transmission line extends on the layer where the decoupling transmission line is located and forms a first pattern, and the second transmission line extends on the layer where the decoupling transmission line is located and forms a second pattern. ### Claim 5 (depends on 4) The antenna apparatus according to claim 4, wherein the decoupling transmission line forms a bent pattern or a curved pattern on the layer of the third substrate, and the bent pattern or the curved pattern is arranged between adjacent decoupling networks. ### Claim 6 (depends on 4) The antenna apparatus according to claim 4, wherein the second pattern formed by the second transmission line on the layer where the decoupling transmission line is located is bent or curved towards a direction away from the decoupling transmission line. ### Claim 7 (depends on 2) The antenna apparatus according to claim 2, wherein each of the plurality of antenna units comprises: a surface radiating sheet, arranged on a surface of the first substrate away from the second substrate; and an inner radiating sheet, isolated from the surface radiating sheet and arranged corresponding to the surface radiating sheet, and arranged on a surface of the first substrate close to the second substrate. ### Claim 8 (depends on 1) The antenna apparatus according to claim 1, wherein a characteristic impedance of the decoupling transmission line changes gradually from both ends of the decoupling transmission line to a middle of the decoupling transmission line. ### Claim 9 (depends on 1) The antenna apparatus according to claim 1, wherein a coupling degree between the two adjacent antenna units is determined based on scattering parameters of the decoupling networks connected to the adjacent antenna units one to one and the length of the decoupling transmission line. ### Claim 10 (depends on 1) The antenna apparatus according to claim 1, wherein a coupling degree between adjacent antenna units is determined based on a length of the decoupling transmission line and scattering parameters of the decoupling networks corresponding to the adjacent antenna units. ### Claim 11 (depends on 1) The antenna apparatus according to claim 1, wherein a relationship among a coupling degree between the adjacent antenna units, the length of the decoupling transmission line, and scattering parameters of the decoupling networks corresponding to the adjacent antenna units satisfies the following formula: S′12S122+S132e−jkds=the coupling degree wherein S′12 is a strength of the initial isolation degree between the adjacent antenna units; S12 and S13 are the scattering parameters of the decoupling networks corresponding to the adjacent antenna units; d5 is the length of the decoupling transmission line, k is a wave number, e is a natural constant, and j is a symbol of an imaginary number. ### Claim 12 (depends on 1) The antenna apparatus according to claim 1, wherein the first transmission line, the second transmission line, and the decoupling transmission line form a power divider, and a relationship between a power division ratio of the power divider and a strength of the initial isolation degree and a relationship between the length of the decoupling transmission line and the phase of the initial isolation degree satisfy the following formula: { ❘ "\[LeftBracketingBar]" S 12 ′ ❘ "\[RightBracketingBar]" = ❘ "\[LeftBracketingBar]" S 13 2 ❘ "\[RightBracketingBar]" / ❘ "\[LeftBracketingBar]" S 12 2 ❘ "\[RightBracketingBar]" ϕ 12 ′ = π - kd 5 wherein S′12 is the strength of the initial isolation degree; S12 and S13 are scattering parameters of the decoupling networks; S 13 2 S 12 2 is the power division ratio; Ø′12 is the phase of the initial isolation degree; ds is the length of the decoupling transmission line, and k is a wave number. ### Claim 13 (depends on 12) The antenna apparatus according to claim 12, wherein a coupling degree between the two adjacent antenna units is allowed to be 0 by configuring the length of the decoupling transmission line and the power division ratio of the power divider. ### Claim 14 (depends on 12) The antenna apparatus according to claim 12, wherein a relationship among a characteristic impedance of the second transmission line, a characteristic impedance of the first transmission line, and the strength of the initial isolation degree satisfies the following formula: Z2=(1+|S′12|)×Z1; wherein Z1 is the characteristic impedance of the first transmission line, and Z2 is the characteristic impedance of the second transmission line. ### Claim 15 (depends on 12) The antenna apparatus according to claim 12, wherein a relationship among a characteristic impedance of the decoupling transmission line, the characteristic impedance of the first transmission line, and the strength of the initial isolation degree satisfies the following formula: Z 3 = ( 1 + 1 ❘ "\[LeftBracketingBar]" S 12 ❘ "\[RightBracketingBar]" ) × Z 1 ; wherein Z1 is the characteristic impedance of the first transmission line, and Z3 is the characteristic impedance of the decoupling transmission line. ### Claim 16 (depends on 1) The antenna apparatus according to claim 1, wherein the plurality of antenna units have the same shape, and the plurality of decoupling networks are configured to have the same scattering parameters. ### Claim 17 An electronic device, comprising: a housing, a display screen assembly, connected to the housing, wherein an accommodating space is defined by the housing and the display screen assembly; an RF chip, arranged in the accommodating space; and an antenna apparatus, at least partially arranged in the accommodating space, and comprising: a plurality of antenna units, spaced from each other; a plurality of decoupling networks, corresponding to the plurality of antenna units one to one, wherein each of the decoupling networks comprises: a first transmission line, an end of the first transmission line being configured to be connected to the RF chip; and a second transmission line, the other end of the first transmission line being connected to an end of the second transmission line, a decoupling port being formed at a joint between the other end of the first transmission line and the end of the second transmission line, and the other end of the second transmission line being connected to a corresponding antenna unit; and a decoupling transmission line, connected between adjacent decoupling ports; the decoupling transmission line comprises a first segment, a second segment, a third segment, a fourth segment and a fifth segment connected in sequence; a width of the first segment is the same with a width of the fifth segment, and a width of the second segment is the same with a width of the fourth segment; the width of the first segment is less than the width of the second segment, and the width of the second segment is less than a width of the third segment; and a width of the fifth segment is less than the width of the fourth segment, and the width of the fourth segment is less than the width of the third segment. ### Claim 18 (depends on 17) The electronic device according to claim 17, wherein the antenna apparatus comprises: a first substrate, the plurality of antenna units being arranged on the first substrate; a second substrate; and a third substrate, the plurality of decoupling networks and the decoupling transmission line being arranged in the third substrate; wherein the first substrate, the second substrate, and the third substrate are stacked in sequence. ### Claim 19 (depends on 18) The electronic device according to claim 18, wherein the RF chip is arranged on a side of the third substrate away from the second substrate.