Antenna system, antenna device, and antenna structure

An antenna structure, comprising:

• a ring-shaped segment having a first end portion, a second end portion spaced apart from the first end portion, and a surrounding portion connected between the first end portion and the second end portion;
• wherein a gap is formed between the first end portion and the second end portion, and the first end portion, the second end portion, and the surrounding portion jointly define a layout region that is in spatial communication with the gap;
• a bandwidth adjustment segment located within a corner of the layout region that is jointly defined by the first end portion and a part of the surrounding portion adjacent to the first end portion;
• wherein the bandwidth adjustment segment is connected to the first end portion along the first direction and the part of the surrounding portion along a second direction that is perpendicular to the first direction, and wherein the bandwidth adjustment segment has a first length along a first direction;
• and
• a frequency adjustment segment located within the layout region and connected to the bandwidth adjustment segment along the second direction;
• wherein the frequency adjustment segment has a second length along the first direction, and the second length is greater than the first length;
• wherein a three-dimensional sensing space is established by the antenna structure through a communication element.

An antenna system, comprising:

• an antenna device, comprising:
• an antenna structure, comprising:
• a ring-shaped segment having a first end portion, a second end portion spaced apart from the first end portion, and a surrounding portion connected between the first end portion and the second end portion;
• wherein a gap is formed between the first end portion and the second end portion, and the first end portion, the second end portion, and the surrounding portion jointly define a layout region communicating with the gap;
• a bandwidth adjustment segment located within a corner of the layout region that is jointly defined by the first end portion and a part of the surrounding portion adjacent to the first end portion;
• wherein the bandwidth adjustment segment is connected to the first end portion along the first direction and the part of the surrounding portion along a second direction that is perpendicular to the first direction, and wherein the bandwidth adjustment segment has a first length along a first direction;
• and
• a frequency adjustment segment located within the layout region and connected to the bandwidth adjustment segment along the second direction;
• wherein the frequency adjustment segment has a second length along the first direction, and the second length is greater than the first length;
• and
• a communication element electrically connected to the first end portion and the second end portion of the ring-shaped segment of the antenna structure;
• wherein a three-dimensional sensing space is established by the antenna structure through the communication element;
• and
• a plurality of sensors respectively placed in a plurality of independent chambers, wherein the antenna device is able to obtain signals from the plurality of sensors.