Antenna device

Abstract

An antenna device includes a substrate, a high-frequency excitation section, a low-frequency excitation section, a high-frequency matching section, a low-frequency matching section, and a grounding section. The high-frequency and low-frequency excitation sections are disposed on the substrate. The low-frequency excitation section includes a first low-frequency excitation segment, a second low-frequency excitation segment, a third low-frequency excitation segment, and a fourth low-frequency excitation segment connected along a first direction. The first low-frequency excitation segment is connected to the high-frequency excitation section. The first low-frequency excitation segment and the high-frequency excitation section are arranged along a second direction. The high-frequency matching section is disposed on the substrate and connected to the first and second low-frequency excitation segments. The low-frequency matching section is disposed on the substrate and connected to the fourth low-frequency excitation segment. The low-frequency matching section extends in the opposite direction to the first direction. The length of the low-frequency matching section is greater than the length of the third low-frequency excitation segment. The grounding section is disposed on the substrate.

Claims

1. An antenna device, comprising: a substrate; a high-frequency excitation section disposed on the substrate, and including a first high-frequency excitation segment, a second high-frequency excitation segment, a third high-frequency excitation segment, a fourth high-frequency excitation segment, a fifth high-frequency excitation segment, a sixth high-frequency excitation segment, and a seventh high-frequency excitation segment sequentially connected, wherein the extension direction of the second high-frequency excitation segment is perpendicular to the extension direction of the first high-frequency excitation segment, the extension direction of the third high-frequency excitation segment is perpendicular to the extension direction of the second high-frequency excitation segment and extends away from the first high-frequency excitation segment, and the extension direction of the fourth high-frequency excitation segment is perpendicular to the extension direction of the third high-frequency excitation segment and extends towards the second high-frequency excitation segment. The high-frequency excitation segment extends in the following directions: the fifth high-frequency excitation segment extends perpendicularly to the fourth high-frequency excitation segment and moves away from the first high-frequency excitation segment; the sixth high-frequency excitation segment extends parallel to the fifth high-frequency excitation segment and moves away from the first high-frequency excitation segment; the seventh high-frequency excitation segment is located at one end of the sixth high-frequency excitation segment near the fifth high-frequency excitation segment, and its extension direction is perpendicular to the sixth high-frequency excitation segment and extends in the opposite direction to the fourth high-frequency excitation segment; a low-frequency excitation section is disposed on the base. The plate includes a first low-frequency excitation segment, a second low-frequency excitation segment, a third low-frequency excitation segment, and a fourth low-frequency excitation segment sequentially connected along a first direction. The first low-frequency excitation segment is connected to a seventh high-frequency excitation segment of the high-frequency excitation section. The first low-frequency excitation segment and at least a portion of the high-frequency excitation section are arranged along a second direction, which is perpendicular to the second direction. The maximum width of the first, second, third, and fourth low-frequency excitation segments increases sequentially along the second direction, and the first low-frequency excitation segment and the sixth high-frequency excitation segment are arranged along the second direction. A high-frequency matching... A high-frequency matching portion is disposed on the substrate and connected to the first low-frequency excitation segment and the second low-frequency excitation segment. The high-frequency matching portion includes a high-frequency matching groove and a high-frequency matching bump. The high-frequency matching groove is located in the sixth high-frequency excitation segment of the high-frequency excitation portion and is recessed in a direction away from the first low-frequency excitation segment. The high-frequency matching bump protrudes from one end of the second low-frequency excitation segment near the first low-frequency excitation segment along the second direction. A low-frequency matching portion is disposed on the substrate and connected to the fourth low-frequency excitation segment. The low-frequency matching portion extends in the opposite direction of the first direction, and the length of the low-frequency matching portion is greater than the length of the third low-frequency excitation segment.A grounding portion is disposed on the substrate and surrounds the high-frequency excitation portion, the high-frequency matching portion, the low-frequency excitation portion, and the low-frequency matching portion. The grounding portion includes a first ground segment, a second ground segment, a third ground segment, a fourth ground segment, and a fifth ground segment connected in sequence. The first ground segment and the second ground segment are located on the same side of the substrate and are separated from each other. One end of the third ground segment is connected to the first ground segment, one end of the fourth ground segment is connected to the second ground segment, and the other ends of the third ground segment and the other ends of the fourth ground segment are respectively connected to the opposite ends of the fifth ground segment. At least a portion of the first high-frequency excitation segment is located between the first ground segment and the second ground segment, and the second high-frequency excitation segment extends toward the second ground segment. A feed-in portion is disposed on the substrate and located between the first ground segment and the second ground segment, and the feed-in portion is connected to the first high-frequency excitation segment.

2. The antenna device as claimed in claim 1, wherein the distance between one side of the high-frequency matching groove and the side of the sixth high-frequency excitation segment near the high-frequency matching protrusion is greater than the distance between the other side of the high-frequency matching groove and the seventh high-frequency excitation segment.

3. The antenna device as claimed in claim 1, wherein the length of the first ground segment is greater than the length of the second ground segment, the width of the first ground segment and the second ground segment is greater than the width of the fifth ground segment, and the width of the fifth ground segment is greater than the width of the third ground segment and the fourth ground segment.

4. The antenna device as claimed in claim 1, wherein the low-frequency matching section and the third low-frequency excitation section are located on the same side of the fourth low-frequency excitation section, and include a first low-frequency matching section, a second low-frequency matching section, a third low-frequency matching section, and a fourth low-frequency matching section connected in sequence, the first low-frequency matching section being connected to the fourth low-frequency excitation section, the second low-frequency matching section, the third low-frequency matching section, the fourth low-frequency matching section, and the second low-frequency excitation section being arranged along the second direction, the extension direction of the second low-frequency matching section being parallel to the extension direction of the first low-frequency matching section, the extension direction of the third low-frequency matching section being perpendicular to the extension direction of the second low-frequency matching section and extending towards the second low-frequency excitation section, and the extension direction of the fourth low-frequency matching section being perpendicular to the extension direction of the third low-frequency matching section and extending towards the first low-frequency matching section.

5. The antenna device as claimed in claim 4, wherein the sixth high-frequency excitation segment is separated from the high-frequency matching bump, the third low-frequency matching segment is separated from the high-frequency matching bump, and the distance between the sixth high-frequency excitation segment and the high-frequency matching bump is greater than the distance between the third low-frequency matching segment and the high-frequency matching bump.

6. The antenna device as claimed in claim 1, wherein the fourth low-frequency excitation segment has a sloping side on the side away from the third low-frequency excitation segment, and the direction of extension of the sloping side is not parallel to the first direction and the second direction.

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