# US 11,444,372 B2 · Antenna, antenna-attached device, and antenna-attached window glass for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,372 B2 - Document ID: US11444372B2 - Status: Granted - Kind: B2 - Application number: 16/822,234 - Filed: 2020-03-18 - Published: 2020-07-09 - Granted: 2022-09-13 - Earliest claimed: 2017-10-10 - Assignees: AGC Inc. - Applicants: AGC Inc. - Inventors: Toshiki Sayama - Web page: https://patentgrep.com/patent/US11444372B2 ## CPC - H01Q 1/1271: {for mounting on windscreens} - H01Q 1/3291: {mounted in or on other locations inside the vehicle or vehicle body} - H01Q 1/1285: {with capacitive feeding through the windscreen} - H01Q 1/2291: {used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W)} - H01Q 1/241: {used in mobile communications, e.g. GSM (H01Q1/247, H01Q1/248 take precedence)} - H01Q 5/371: Branching current paths - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - H01Q 5/392: the parasitic elements having dual-band or multi-band characteristics - H01Q 9/26: with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength (resonant loop antennas H01Q7/00) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna includes a first feeding portion, a second feeding portion, and a loop element including a first end and a second end, the first end being connected to the first feeding portion, and the second end being connected to the second feeding portion, wherein the loop element has a first element portion and a second element portion, which appear to face each other in a vertical direction in an elevation view as seen in a direction parallel with a horizontal plane, and wherein a first gap is provided in a middle of the first element portion, and a second gap is provided in a middle of the second element portion. ## Claims ### Claim 1 An antenna comprising: a feeding portion comprising a first feeding portion and a second feeding portion and defining a gap therebetween; and a loop element including a first end and a second end, the first end being connected to the first feeding portion, and the second end being connected to the second feeding portion, wherein the loop element has a first element portion and a second element portion, which appear to face each other in a vertical direction in an elevation view as seen in a direction parallel with a horizontal plane, wherein a first gap is provided in a middle of the first element portion, and a second gap is provided in a middle of the second element portion, wherein the loop element has a first antenna conductor connected to the feeding portion and a second antenna conductor not connected to the feeding portion, wherein the first gap and the second gap are present between the first antenna conductor and the second antenna conductor, wherein a resonance of the loop element is reconfigurable between a first resonance mode and a second resonance mode, and wherein the first resonance mode is a reverse phase mode in which current flowing through the first antenna conductor is in an opposite direction to current flowing through the second antenna conductor. ### Claim 2 (depends on 1) The antenna according to claim 1, wherein a virtual line passing through the first gap and the second gap is substantially parallel with a virtual plane orthogonal to the horizontal plane, when the antenna is seen in the direction parallel with the horizontal plane. ### Claim 3 (depends on 2) The antenna according to claim 2, wherein the virtual line is substantially orthogonal to a longitudinal direction of at least one of the first element portion and the second element portion. ### Claim 4 (depends on 1) The antenna according to claim 1, wherein the first element portion and the second element portion are substantially parallel with each other. ### Claim 5 (depends on 1) The antenna according to claim 1, wherein the first gap is provided, in the middle of the first element portion, in a longitudinal direction of the first element portion or a direction orthogonal to the longitudinal direction of the first element portion, and the second gap is provided, in the middle of the second element portion, in a longitudinal direction of the second element portion or a direction orthogonal to the longitudinal direction of the second element portion. ### Claim 6 (depends on 1) The antenna according to claim 1, wherein the first element portion and the second element portion are present in a same plane. ### Claim 7 (depends on 1) The antenna according to claim 1, wherein the first element portion is present in a first plane, and the second element portion is present in a second plane substantially parallel with the first plane. ### Claim 8 (depends on 7) The antenna according to claim 7, wherein at least one of the first feeding portion and the second feeding portion is present in a third plane between the first plane and the second plane. ### Claim 9 (depends on 8) The antenna according to claim 8, wherein the third plane is substantially orthogonal to or substantially parallel with at least one of the first plane and the second plane. ### Claim 10 (depends on 1) The antenna according to claim 1, wherein the loop element has an electrical length of approximately one wavelength of a frequency at which the antenna operates. ### Claim 11 (depends on 1) The antenna according to claim 1, wherein the loop element includes a first element between the first feeding portion and the first gap, a second element between the first gap and the second gap, and a third element between the second gap and the second feeding portion, and wherein where an electrical length including both of the first element and the third element is denoted as Le1, and an electrical length of the second element is denoted as Le2, a ratio (Le1/Le2) is equal to or more than 0.6 and equal to or less than 1.4. ### Claim 12 (depends on 11) The antenna according to claim 11, wherein the ratio (Le1/Le2) is 0.7 or more and 1.3 or less. ### Claim 13 (depends on 11) The antenna according to claim 11, wherein the ratio (Le1/Le2) is 0.8 or more and 1.2 or less. ### Claim 14 (depends on 1) The antenna according to claim 1, wherein a matching circuit including an inductance and a capacitance is provided between the first feeding portion and the second feeding portion. ### Claim 15 (depends on 1) An antenna-attached device comprising: a substrate; and the antenna according to claim 1 attached to the substrate. ### Claim 16 (depends on 1) An antenna-attached window glass for a vehicle comprising: a glass plate for a vehicle-use window; and the antenna according to claim 1 attached to the glass plate. ### Claim 17 (depends on 16) The antenna-attached window glass according to claim 16, wherein the glass plate is a windshield. ### Claim 18 (depends on 16) The antenna-attached window glass according to claim 16, wherein the glass plate is attached to a window frame of the vehicle at an angle that is more than 0 degrees and that is equal to or less than 90 degrees with respect to the horizontal plane. ### Claim 19 (depends on 1) The antenna according to claim 1, wherein the antenna is capable of transmitting and receiving electromagnetic waves in a Ultra High Frequency (UHF) band. ### Claim 20 (depends on 1) The antenna according to claim 1, wherein the antenna is capable of transmitting and receiving electromagnetic waves in three bands, including 0.698 GHz to 0.96 GHz, 1.71 GHz to 2.17 GHz, and 2.4 GHz to 2.69 GHz.