Slot antenna device

Abstract

The invention provides a slot antenna device. The slot antenna device comprises a conductive shell, an inner frame, an adhesive and a circuit board, the conductive shell is provided with an inner surface and an outer surface which are opposite, and is provided with a slotted hole and a chamfer structure; the slotted hole penetrates from the inner surface to the outer surface. The chamfer structure is formed at the junction of the slotted hole and the inner surface. The inner frame is arranged on the inner surface of the conductive shell. The inner frame is provided with a glue overflowing groove. A notch of the glue overflowing groove faces the inner surface. A spacing distance between the glue overflowing groove and the chamfering structure is larger than or equal to 0 mm and smaller than or equal to 2.0 mm. The adhesive is arranged between the conductive shell and the inner frame. A part of the adhesive is located in the adhesive overflow groove. The circuit board is arranged in the inner frame. The circuit board and the slot form an antenna radiator. According to the slot antenna device provided by the invention, the efficiency of the slot antenna can be stably mastered.

Description

Technical Field

[0001] This invention relates to a slot antenna device, and more particularly to a slot antenna device capable of stably controlling the performance of a slot antenna. Background Technology

[0002] There are many types of antennas used in electronic products today, among which slot antennas allow electronic products to have a largely metallic appearance. However, this metallic appearance is usually accompanied by gaps created when forming the slots. For aesthetic reasons, electronic product manufacturers typically narrow the width of the slots.

[0003] As the width of the slot becomes narrower, the performance shift of the slot antenna caused by processing defects during slot formation will become more significant. Summary of the Invention

[0004] In view of the above problems, one object of the present invention is to provide a slot antenna device that can stably control the performance of the slot antenna.

[0005] An embodiment of the present invention provides a slot antenna device, comprising a conductive housing, an inner frame, an adhesive, and a circuit board. The conductive housing has an inner surface and an outer surface facing each other, and has a slot and a chamfered structure. The slot extends from the inner surface to the outer surface. The chamfered structure is formed at the junction of the slot and the inner surface. The inner frame is disposed on the inner surface of the conductive housing. The inner frame has an adhesive overflow groove. One opening of the adhesive overflow groove faces the inner surface. The distance between the adhesive overflow groove and the chamfered structure is greater than or equal to 0 mm and less than or equal to 2.0 mm. The adhesive is disposed between the conductive housing and the inner frame. A portion of the adhesive is located within the adhesive overflow groove. The circuit board is disposed on the inner frame. The circuit board and the slot form an antenna radiator.

[0006] According to an embodiment of the present invention, a slot antenna device has an adhesive overflow groove on the inner frame located near the slot, with the opening of the overflow groove facing the inner surface of the conductive housing. This allows excess adhesive to flow into the overflow groove when bonding the conductive housing and the inner frame, preventing adhesive from flowing into the slot. The chamfered structure of the conductive housing formed at the junction of the slot and the inner surface effectively eliminates burrs that may occur between the conductive housing and the circuit board. In this way, unintended material configuration of the slot in the antenna radiator can be avoided, thereby stabilizing the performance of the slot antenna.

[0007] The foregoing description of the invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the invention, and to provide a further explanation of the scope of the patent application. Attached Figure Description

[0008] Figure 1The diagram shown is a side cross-sectional view of a slotted antenna device according to an embodiment of the present invention.

[0009] Component designation explanation

[0010] 1: Slotted antenna device

[0011] 10: Conductive housing

[0012] 10a: Inner surface

[0013] 10b: Outer surface

[0014] 10c: Slot

[0015] 10d: Chamfered structure

[0016] 20: Inner frame

[0017] 20a: Glue overflow tank

[0018] 20b: Groove

[0019] 30: Adhesive

[0020] 40: Circuit board

[0021] 41: Grounding component

[0022] 50: Membrane

[0023] 60: Support component

[0024] T1, T2: Thickness

[0025] W1: Minimum aperture

[0026] W2, W3: Spacing

[0027] θ: included angle Detailed Implementation

[0028] The following embodiments describe in detail the features and advantages of the present invention, the content of which is sufficient to enable anyone skilled in the art to understand the technical content of the embodiments of the present invention and to implement them accordingly. Based on the disclosure, claims, and drawings in this specification, anyone skilled in the art can easily understand the related objects and advantages of the present invention. The following embodiments are used to further illustrate the content of the present invention, but are not intended to limit the scope of the present invention in any way.

[0029] In the so-called schematic diagrams in this specification, dimensions, proportions, and angles may be exaggerated for illustrative purposes, but are not intended to limit the invention. Various modifications are possible without departing from the spirit of the invention. The up, down, front, and back orientations mentioned in the description of the embodiments and drawings are for illustrative purposes and are not intended to limit the invention.

[0030] Please refer to Figure 1 . Figure 1 The diagram shown is a side cross-sectional view of a slotted antenna device according to an embodiment of the present invention.

[0031] like Figure 1 As shown, the slot antenna device 1 includes a conductive housing 10, an inner frame 20, an adhesive 30, and a circuit board 40.

[0032] In this embodiment, the conductive housing 10 has an inner surface 10a and an outer surface 10b, and also has a slot 10c and a chamfered structure 10d. The inner surface 10a and the outer surface 10b are disposed opposite to each other. The slot 10c extends from the inner surface 10a to the outer surface 10b. The chamfered structure 10d is formed at the junction of the slot 10c and the inner surface 10a. The slot 10c is a through hole with different widths and lengths. The width of the slot 10c is typically the minimum aperture W1. In this embodiment, the minimum aperture W1 of the slot 10c is 1mm ± 10%, but is not limited thereto. In other embodiments, the minimum aperture W1 of the slot 10c may also be greater than 1mm.

[0033] In this embodiment, the chamfer structure 10d has a plane, and the angle θ between the chamfer structure 10d and the inner surface 10a is greater than or equal to 45° and less than or equal to 70°. However, this is not a limitation. In other embodiments, the chamfer structure may also have a rounded surface, in which case this chamfer structure may also be referred to as a fillet.

[0034] In this embodiment, the inner frame 20 is disposed on the inner surface 10a of the conductive housing 10. The inner frame 20 has an adhesive overflow groove 20a. An opening 20b of the adhesive overflow groove 20a faces the inner surface 10a. The inner frame 20... Figure 1 The thickness T1 in the vertical direction is greater than or equal to 0.6 mm and less than or equal to 0.7 mm.

[0035] In this embodiment, the overflow tank 20a is in Figure 1 The horizontal direction surrounds the slot 10c. Figure 1 In the cross-sectional view, the cross-section of the glue overflow channel 20a is located on the left and right sides of the cross-section of the slot 10c. The interval distance W2 on the left side and the interval distance W3 on the right side of the chamfered structure 10d from the glue overflow channel 20a are each greater than or equal to 0 mm and less than or equal to 2.0 mm. However, this is not a limitation. In other embodiments, the interval distances from the glue overflow channel 20a to the chamfered structure 10d in each direction (each side) may be the same. In other embodiments, the glue overflow channel 20a may be provided on only one or more sides of the slot 10c. When the glue overflow channel 20a is provided on multiple sides of the slot 10c, the interval distances from the glue overflow channel 20a to each side of the chamfered structure 10d may be the same or different.

[0036] In this embodiment, the inner frame 20 is made of an insulating material, but this is not a limitation. In other embodiments, the inner frame 20 may also be made of a metallic or non-metallic conductive material.

[0037] Adhesive 30 is disposed between the conductive housing 10 and the inner frame 20. A portion of the adhesive 30 is located within the adhesive overflow groove 20a of the inner frame 20. The adhesive 30... Figure 1 The antenna radiator has a thickness T2 in the vertical direction, which is very close to zero. An overflow groove 20a of the inner frame 20 is located near the slot 10c of the conductive housing 10, with the opening 20b of the overflow groove 20a facing the inner surface 10a of the conductive housing 10. This allows excess adhesive 30 to flow into the overflow groove 20a when bonding the conductive housing 10 and the inner frame 20, preventing adhesive 30 from flowing into the slot 10c. This method avoids unintended material configuration of the slot 10c of the antenna radiator, thereby stabilizing the performance of the slot antenna.

[0038] Circuit board 40 is disposed within inner frame 20. Circuit board 40 has a grounding element 41. Circuit board 40 and slot 10c form an antenna radiator. The grounding element 41 of circuit board 40 and slot 10c are connected at... Figure 1 The vertical distance is the sum of the thickness T1 of the inner frame 20 and the thickness T2 of the adhesive 30. Since the thickness T2 of the adhesive 30 is extremely close to zero, the distance between the grounding component 41 and the slot 10c is... Figure 1 The vertical distance is primarily maintained by the thickness T1 of the inner frame 20. The chamfered structure 10d of the conductive housing 10, formed at the junction of the slot 10c and the inner surface 10a, effectively eliminates any burrs that may occur between the conductive housing 10 and the circuit board 40. This prevents unintended material configuration of the slot 10c of the antenna radiator, thereby ensuring stable performance of the slot antenna.

[0039] In this embodiment, the slot antenna device 1 may also include a diaphragm 50 and a support member 60. The diaphragm 50 is disposed on the conductive housing 10 and seals the slot 10c. The outer surface 10b of the conductive housing 10 is closer to the diaphragm 50 than the inner surface 10a. The support member 60 is disposed in the slot 10c and contacts the inner frame 20 and the diaphragm 50. In this embodiment, the support member 60 has a rectangular cross-section. The conductive housing 10, the inner frame 20, and the support member 60 surround a space with a slightly triangular cross-section at the position of the chamfered structure 10d, but this is not a limitation. In other embodiments, the support member 60 may further fill the slightly triangular space located in the chamfered structure 10d (filling the chamfered structure 10d).

[0040] In other embodiments, the slot antenna device 1 may also include a support member 60 but not the diaphragm 50. The support member 60 may be disposed in the slot 10c of the conductive housing 10 and completely fill the slot 10c and the chamfered structure 10d.

[0041] When the slot antenna device 1 is assembled, the slot antenna performance of the slot antenna device 1 can be confirmed by measuring the voltage standing wave ratio (VSWR) of the slot antenna device 1.

[0042] In summary, in one embodiment of the slot antenna device of the present invention, an overflow groove for adhesive is provided near the slot in the inner frame, with the opening of the overflow groove facing the inner surface of the conductive housing. This allows excess adhesive to flow into the overflow groove when the conductive housing and the inner frame are bonded, thus preventing adhesive from flowing into the slot. The chamfered structure of the conductive housing formed at the junction of the slot and the inner surface effectively eliminates burrs that may occur between the conductive housing and the circuit board. In this way, unintended material configuration of the slot in the antenna radiator can be avoided, thereby stabilizing the performance of the slot antenna.

[0043] While the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the invention. Any modifications and refinements made without departing from the spirit and scope of the invention are within the scope of patent protection of the present invention. For details regarding the scope of protection defined in the present invention, please refer to the appended claims.

Claims

1. A slot antenna device, characterized in that, include: A conductive housing has an inner surface and an outer surface opposite to each other, and has a slot and a chamfer structure, the slot extending from the inner surface to the outer surface, and the chamfer structure being formed at the junction of the slot and the inner surface; An inner frame is disposed on the inner surface of the conductive housing. The inner frame has an overflow groove, one opening of which faces the inner surface. The distance between the overflow groove and the chamfered structure is greater than or equal to 0 mm and less than or equal to 2.0 mm. An adhesive is disposed between the conductive housing and the inner frame, a portion of which is located within the adhesive overflow groove; and A circuit board is disposed in the inner frame, and the circuit board and the slot form an antenna radiator.

2. The slot antenna device according to claim 1, characterized in that, The overflow groove surrounds the slot.

3. The slot antenna device according to claim 1, characterized in that, The minimum diameter of the slot is 1 mm ± 10%.

4. The slot antenna device according to claim 1, characterized in that, The chamfered structure has a plane or a circular arc surface.

5. The slot antenna device according to claim 4, characterized in that, The angle between the chamfered structure and the inner surface is greater than or equal to 45° and less than or equal to 70°.

6. The slot antenna device according to claim 1, characterized in that, It also includes a membrane body disposed on the conductive housing and sealing the slot, wherein the outer surface is closer to the membrane body than the inner surface.

7. The slot antenna device according to claim 6, characterized in that, It also includes a support member disposed in the slot and in contact with the inner frame and the membrane.

8. The slot antenna device according to claim 1, characterized in that, It also includes a support member disposed in the slot and filling the chamfered structure.

9. The slot antenna device according to claim 1, characterized in that, The thickness of the inner frame is greater than or equal to 0.6 mm and less than or equal to 0.7 mm.

10. The slot antenna device according to claim 1, characterized in that, The inner frame is made of metal or plastic.

Images