Antenna module and electronic device

Abstract

The present invention proposes an antenna module and an electronic device. The antenna module includes a first radiator, a second radiator, a third radiator and a ground radiator. The first radiator includes a first section and a second section, the first section includes a feed end, the first radiator excites a first frequency band, and the extension direction of the first section is not parallel to the extension direction of the second section. The second radiator includes a third section and a fourth section, wherein the third section extends from the intersection of the first section and the second section in a direction opposite to the extension direction of the second section, and the third section excites a second frequency band. The third radiator is arranged beside the first radiator and away from the second radiator. The ground radiator is arranged on one side of the first radiator, the second radiator and the third radiator, and includes a ground end, wherein the fourth section of the second radiator connects the third section and the ground radiator, and the third radiator is connected to the ground end.

Description

Technical Field

[0001] The invention relates to an antenna module and an electronic device, and in particular to a multi-frequency antenna module and an electronic device having the antenna module. Background Art

[0002] The grounding terminal of the antenna in today's electronic devices is usually directly connected to the metal back cover through aluminum foil to ground the system. However, as the performance of electronic devices increases, they are prone to overheating and need to be cooled by internal fans to blow out the heat. Therefore, how to arrange the antenna grounding terminal and other components in electronic devices to meet the system grounding requirements without affecting the heat dissipation, and how to have a multi-band antenna module with good performance are the current research directions. Summary of the invention

[0003] One of the objectives of the present invention is to provide an antenna module having good multi-band characteristics.

[0004] Another object of the present invention is to provide an electronic device having the above antenna and having good heat dissipation performance.

[0005] An antenna module of the present invention includes a first radiator, a second radiator, a third radiator and a grounded radiator. The first radiator includes a first section and a second section, the first section includes a feed end, the first radiator excites a first frequency band, the first section is connected to the second section, and the extension direction of the first section is non-parallel and intersects with the extension direction of the second section. The second radiator includes a third section and a fourth section, wherein the third section extends from the intersection of the first section and the second section in a direction opposite to the extension direction of the second section, and the third section excites a second frequency band. The third radiator is arranged beside the first radiator and away from the second radiator. The grounded radiator is arranged on one side of the first radiator, the second radiator and the third radiator, and includes a grounding end, the fourth section of the second radiator connects the third section and the grounded radiator, and the third radiator is connected to the grounding end.

[0006] In one embodiment of the present invention, a U-shaped groove is formed between the first radiator, the third radiator, the ground radiator and the fourth segment.

[0007] In one embodiment of the present invention, the third radiator includes a fifth segment, a sixth segment and a seventh segment that are bent and connected in sequence, forming a U-shaped structure with an opening facing away from the first radiator. The fifth segment and the sixth segment intersect at the ground end, and the sixth segment is located next to the end of the second segment, and the end is far away from the third segment.

[0008] In one embodiment of the present invention, the distance between the sixth section and the end of the second section is between 0.5 mm and 2 mm.

[0009] In an embodiment of the present invention, an extending direction of the ground radiator is parallel to an extending direction of the second section and the third section.

[0010] An electronic device of the present invention comprises a housing, a fan, a first heat sink, a second heat sink, at least one first conductive member, the above-mentioned antenna module and a second conductive member. The housing comprises a heat dissipation port. The fan is arranged in the housing and comprises a first surface, a second surface opposite to the first surface and an air outlet between the first surface and the second surface, and the air outlet is arranged corresponding to the heat dissipation port. The first heat sink extends from the first surface of the fan to the heat dissipation port. The second heat sink extends from the second surface of the fan to the heat dissipation port. At least one first conductive member is arranged away from the heat dissipation port and connects the first heat sink and the second heat sink. The antenna module is arranged in the housing and close to the heat dissipation port. The second conductive member connects the antenna module and the first heat sink, and the antenna module, the second conductive member, the first heat sink, the at least one first conductive member and the second heat sink form a loop.

[0011] In one embodiment of the present invention, the material of the shell is a conductor, and the second heat sink is connected to the shell.

[0012] In one embodiment of the present invention, the electronic device further comprises a screen and a third conductive member. The screen is exposed outside the housing. The third conductive member connects the second conductive member and the screen.

[0013] In one embodiment of the present invention, the second conductive member is located outside the space between the first heat sink and the second heat sink, and the wind blown by the fan passes through the space between the first heat sink and the second heat sink and the heat dissipation port and leaves the housing.

[0014] In one embodiment of the present invention, the at least one first conductive member includes a plurality of first conductive members, the fan includes a third surface and a fourth surface located between and adjacent to the first surface and the second surface, and the first conductive members are disposed on the third surface and the fourth surface.

[0015] Based on the above, the first radiator of the antenna module of the present invention includes a first section and a second section connected, the third section of the second radiator extends from the intersection of the first section and the second section in a direction opposite to the extension direction of the second section, and the third radiator is arranged beside the first radiator and away from the second radiator. The ground radiator is arranged on one side of the first radiator, the second radiator and the third radiator, the fourth section of the second radiator connects the third section and the ground radiator, and the third radiator is connected to the ground end. The antenna module of the present invention can excite the first frequency band and the second frequency band and has good performance through the above design. In addition, the first heat sink of the electronic device of the present invention extends from the first surface of the fan to the heat dissipation port, and the second heat sink extends from the second surface of the fan to the heat dissipation port. The first conductive member is arranged away from the heat dissipation port and connects the first heat sink and the second heat sink. The second conductive member connects the antenna module and the first heat sink. Therefore, the ground radiator, the second conductive member, the first heat sink, the first conductive member and the second heat sink of the antenna module form a loop, and have a good grounding effect. In addition, the above-mentioned grounding path avoids the space between the air outlet and the heat dissipation port, so that the electronic device has a good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an antenna module according to an embodiment of the present invention.

[0017] Figure 2 It is a partial top view schematic diagram of the interior of an electronic device according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 A partial cross-sectional schematic diagram of an electronic device.

[0019] Figure 4 yes Figure 1 Frequency-VSWR relationship diagram of the antenna module.

[0020] Figure 5 yes Figure 1 A frequency-antenna efficiency diagram of the antenna module.

[0021] The reference numerals are as follows:

[0022] A1~A5、B1~B4、G1~G4: Location

[0023] D: Distance

[0024] L1: Length

[0025] L2, L3: Width

[0026] S: Space

[0027] X, Y, Z: coordinates

[0028] 10: Electronic devices

[0029] 20: Shell

[0030] 22: Heat dissipation vent

[0031] 30: Fan

[0032] 31: First surface

[0033] 32: Second surface

[0034] 33: Third surface

[0035] 34: Fourth Surface

[0036] 35: Wind outlet

[0037] 40: first heat sink

[0038] 42: Holes

[0039] 50: Second heat sink

[0040] 60: first conductive element

[0041] 70: Second conductive member

[0042] 75: Third conductive element

[0043] 80: Screen

[0044] 85: Glass

[0045] 95: Bracket

[0046] 100: Antenna module

[0047] 110: First Radiator

[0048] 112: First paragraph

[0049] 114: Second paragraph

[0050] 120: Second radiator

[0051] 122: The third paragraph

[0052] 124: The fourth paragraph

[0053] 130: The Third Radiator

[0054] 132: Paragraph 5

[0055] 134: Paragraph 6

[0056] 136: Paragraph 7

[0057] 140: Ground radiator

[0058] 150: U-shaped groove

[0059] 160: Coaxial transmission line DETAILED DESCRIPTION

[0060] Figure 1 is a schematic diagram of an antenna module according to an embodiment of the present invention. Figure 1 The antenna module 100 of this embodiment includes a first radiator 110 (positions A1 to A3), a second radiator 120 (positions A4 to A5, A4 to G2), a third radiator 130 (positions B1 to B4) and a ground radiator 140 (positions G1 to G4).

[0061] Specifically, the first radiator 110 (positions A1-A3) includes a first section 112 (positions A1-A2) and a second section 114 (positions A2-A3), the first section 112 is connected to the second section 114, and the extension direction of the first section 112 is not parallel to the extension direction of the second section 114. The first section 112 includes a feed end (position A1), and the first radiator 110 excites a first frequency band. In this embodiment, the first frequency band is, for example, the frequency band of WiFi 5G.

[0062] The second radiator 120 (positions A4-A5, A4-G2) includes a third section 122 (positions A2, A4, A5) and a fourth section 124 (positions A4-G2). The third section 122 (positions A2, A4, A5) extends from the intersection of the first section 112 and the second section 114, that is, position A2, in a direction opposite to the extension direction of the second section 114 (positions A2-A3).

[0063] The third section 122 excites a second frequency band. In this embodiment, the second frequency band is, for example, the frequency band of WiFi 2.4G. In addition, in this embodiment, the length or width of the third section 122 (positions A4-A5) can be adjusted to adjust the position of the antenna resonance frequency point of WiFi 2.4GHz.

[0064] The third radiator 130 (position B1-B4) is disposed beside the first radiator 110 and away from the second radiator 120. The third radiator 130 (position B1-B4) includes a fifth section 132 (position B4-B1), a sixth section 134 (position B1-B2) and a seventh section 136 (position B2-B3) that are bent and sequentially connected, and presents a U-shaped structure with an opening facing away from the first radiator 110.

[0065] In this embodiment, the second section 114 of the first radiator 110 has an end (position A3) away from the third section 122, and the sixth section 134 (position B1-B2) is located next to the end (position A3) of the second section 114 (positions A2-A3). A distance D between the sixth section 134 (position B2) and the end (position A3) of the second section 114 is between 0.5 mm and 2 mm, for example, 1 mm.

[0066] The length or width of the third radiator 130 (positions B1-B4), especially the length or width of the sixth section 134 (positions B1-B2), can be adjusted to adjust the antenna resonance frequency point position of WiFi 5GHz.

[0067] The ground radiator 140 (positions G1 to G4) is disposed on one side of the first radiator 110 (positions A1 to A3), the second radiator 120 (positions A2, A4, A5, A4 to G2), and the third radiator 130 (positions B1 to B4). The extension direction of the ground radiator 140 (positions G1 to G4) is parallel to the extension direction of the second section 114 (positions A2 to A3) and the third section 122 (positions A2, A4, A5). The fourth section 124 of the second radiator 120 connects the portion of the third section 122 at position A4 and the portion of the ground radiator 140 at position G2.

[0068] The ground radiator 140 (positions G1 to G4) includes a ground end (position G1). The third radiator 130 is connected to the ground end (position G1). Specifically, the fifth segment 132 and the sixth segment 134 of the third radiator 130 intersect at the ground end (position G1) at position B1.

[0069] In this embodiment, the feeding end (position A1) of the antenna module 100 is connected to the positive end of a coaxial transmission line 160, and is connected to a radio frequency signal source (not shown) through the coaxial transmission line 160, and the grounding end (position G1) is connected to the negative end of the coaxial transmission line 160, and is connected to a system ground plane (not shown) through the coaxial transmission line 160.

[0070] Depend on Figure 1 It can be seen that a U-shaped groove 150 is formed between the first radiator 110 (position A1-A3), the sixth section 134 (position B1-B2) of the third radiator 130, the portion of the ground radiator 140 at positions G1-G2 and the fourth section 124 (position A4-G2). The U-shaped groove can adjust or control the impedance matching of WiFi 2.4GHz and WiFi 5GHz.

[0071] Therefore, the antenna module 100 of this embodiment produces good WiFi dual-band antenna characteristics by combining the low-frequency WiFi 2.4 GHz PIFA totem (the first radiator 110) and the high-frequency WiFi 5 GHz open-loop totem (the second radiator 120 and the third radiator 130).

[0072] In addition, the size of the antenna module 100 of this embodiment is quite small, and can be configured on a substrate with a length L1 of, for example, 40 mm and a width L2 of, for example, 7.25 mm. The width L3 of the ground radiator 140 is approximately 1.5 mm. Therefore, the antenna module 100 of this embodiment can be applied to a tablet computer with a narrow frame.

[0073] Figure 2 It is a partial top view schematic diagram of the interior of an electronic device according to an embodiment of the present invention. Figure 3 yes Figure 2 A partial cross-sectional diagram of an electronic device 10 is shown. Figure 2 and Figure 3 The electronic device 10 of this embodiment is, for example, a tablet computer, but is not limited thereto. The electronic device 10 includes a housing 20 (eg Figure 3 ), a fan 30, a first heat sink 40, a second heat sink 50 (as shown in Figure 3 As shown), at least one first conductive member 60, Figure 1 The antenna module 100 and a second conductive member 70 are provided. It should be noted that Figure 2 The main purpose is to describe the positional relationship between the components. For detailed features of the antenna module 100, please see Figure 1 .

[0074] Depend on Figure 3 It can be seen that the housing 20 includes a heat dissipation port 22. The fan 30 is disposed in the housing 20, and the fan 30 includes a first surface 31 (upper surface), a second surface 32 (lower surface) opposite to the first surface 31, and an air outlet 35 located between the first surface 31 and the second surface 32. The air outlet 35 of the fan 30 is disposed corresponding to the heat dissipation port 22 of the housing 20.

[0075] The first heat sink 40 is attached to the first surface 31 (upper surface) of the fan 30 and extends from the first surface 31 of the fan 30 toward the heat dissipation opening 22. Figure 2 It can be seen that the first heat dissipation element 40 has a hole 42 through which the blades of the fan 30 are exposed.

[0076] In addition, by Figure 3 It can be seen that the second heat sink 50 is attached to the second surface 32 (lower surface) of the fan 30 and extends from the second surface 32 of the fan 30 toward the heat dissipation port 22. The first heat sink 40 and the second heat sink 50 are, for example, copper foil, but not limited thereto.

[0077] Depend on Figure 3 It can be seen that at least one first conductive member 60 is disposed away from the heat dissipation opening 22 and connects the first heat dissipation member 40 and the second heat dissipation member 50. In this embodiment, there are multiple first conductive members 60. Figure 2 It can be seen that the fan 30 includes a third surface 33 (side surface) and a fourth surface 34 ( Figure 2 The first conductive members 60 are disposed on the third surface 33 and the fourth surface 34 to connect the first heat sink 40 and the second heat sink 50 located above and below. In addition, in this embodiment, the material of the housing 20 is a conductor, and the second heat sink 50 is connected to the housing 20.

[0078] Depend on Figure 3 It can be seen that the antenna module 100 is disposed in the housing 20 and near the heat dissipation port 22. In this embodiment, the antenna module 100 is disposed on a bracket 95. The bracket 95 is made of an insulating material, such as plastic. The bracket 95 is disposed above the heat dissipation port 22. The second conductive member 70 connects the antenna module 100 and the first heat dissipation member 40. Figure 1 As shown, the second conductive member 70 is connected to the grounded radiator 140 of the antenna module 100. The second conductive member 70 is, for example, aluminum foil, but not limited thereto.

[0079] Please go back Figure 3 In this embodiment, the ground radiator 140 (indicated at Figure 1 ) will sequentially form a loop with the second conductive element 70, the first heat sink 40, the first conductive element 60, the second heat sink 50 and the housing 20 to achieve a complete system grounding.

[0080] In addition, in this embodiment, the electronic device 10 further includes a screen 80 and a third conductive member 75. The third conductive member 75 is, for example, conductive foam, but is not limited thereto. The screen 80 is exposed outside the housing 20 and is covered by a glass 85. The third conductive member 75 connects the second conductive member 70 and the screen 80. Therefore, the grounded radiator 140 (indicated at Figure 1 ) will sequentially form another loop with the second conductive member 70, the third conductive member 75 and the metal of the screen 80 to achieve the effect of a second grounding.

[0081] Furthermore, by Figure 3 It is clearly seen that the second conductive member 70 and the first conductive member 60 are located outside the space S between the first heat sink 40 and the second heat sink 50. Specifically, the second conductive member 70 is located above the first heat sink 40, and the first conductive member 60 is located on the third surface 33 and the fourth surface 34 of the fan 30, avoiding the side surface where the air outlet 35 is located to avoid affecting the air outlet.

[0082] Since the space S between the first heat sink 40 and the second heat sink 50 is not blocked by any components, the wind blown out by the fan 30 passes through the space S between the first heat sink 40 and the second heat sink 50 and the heat dissipation port 22 from the air outlet 35 and leaves the housing 20. In other words, the grounding path of the antenna module 100 will not affect the heat dissipation path, so that the electronic device 10 can have a good heat dissipation effect.

[0083] In addition, since the grounding path includes the first heat sink 40 and the second heat sink 50 , other elements in the grounding path can also help cool the first heat sink 40 and the second heat sink 50 , thereby further improving the heat dissipation effect.

[0084] Figure 4 yes Figure 1 The frequency-VSWR relationship diagram of the antenna module. Figure 4 , the VSWR (voltage standing wave ratio) of the antenna module 100 at WiFi 2.4 GHz and WiFi 5 GHz can be below 3, and has good performance.

[0085] Figure 5 yes Figure 1 The relationship between frequency and antenna efficiency of the antenna module. Figure 5 The antenna efficiency of the antenna module 100 at the low-frequency WiFi 2.4GHz is greater than -4dBi, and the antenna efficiency at the high-frequency WiFi 5GHz is greater than -5dBi, both of which have good performance.

[0086] In summary, the first radiator of the antenna module of the present invention includes a first section and a second section that are bent and connected, the third section of the second radiator extends from the intersection of the first section and the second section in a direction opposite to the extension direction of the second section, and the third radiator is arranged beside the first radiator and away from the second radiator. The ground radiator is arranged on one side of the first radiator, the second radiator and the third radiator, the fourth section of the second radiator connects the third section and the ground radiator, and the third radiator is connected to the ground end. The antenna module of the present invention can excite the first frequency band and the second frequency band and has good performance through the above design. In addition, the first heat sink of the electronic device of the present invention extends from the first surface of the fan to the heat dissipation port, and the second heat sink extends from the second surface of the fan to the heat dissipation port. The first conductive member is arranged away from the heat dissipation port and connects the first heat sink and the second heat sink. The second conductive member connects the antenna module and the first heat sink. Therefore, the ground radiator, the second conductive member, the first heat sink, the first conductive member and the second heat sink of the antenna module form a loop, and have a good grounding effect. Furthermore, the downward path avoids the space between the air outlet and the heat dissipation outlet, so that the electronic device has a good heat dissipation effect.

Claims

1. An antenna module, characterized in that: include: A first radiator, comprising a first section and a second section, the first section comprising a feeding end, the first radiator excites a first frequency band, the first section is connected to the second section, and an extension direction of the first section is non-parallel to an extension direction of the second section; a second radiator, comprising a third section and a fourth section, wherein the third section extends from the intersection of the first section and the second section in a direction opposite to the extension direction of the second section, and the third section excites a second frequency band; a third radiator, disposed beside the first radiator and away from the second radiator; and A ground radiator is disposed on one side of the first radiator, the second radiator and the third radiator and comprises a ground end. The fourth section of the second radiator connects the third section and the ground radiator, and the third radiator is connected to the ground end.

2. The antenna module according to claim 1, characterized in that: A U-shaped groove is formed between the first radiator, the third radiator, the ground radiator and the fourth section.

3. The antenna module according to claim 1, wherein: The third radiator includes a fifth section, a sixth section and a seventh section which are bent and connected in sequence, and present a U-shaped structure with an opening facing away from the first radiator. The fifth section and the sixth section intersect at the ground end. The sixth section is located beside the end of the second section, and the end is far away from the third section.

4. The antenna module according to claim 3, characterized in that: The distance between the sixth section and the end of the second section is between 0.5 mm and 2 mm.

5. The antenna module according to claim 1, wherein: The extending direction of the ground radiator is parallel to the extending directions of the second section and the third section.

6. An electronic device, characterized in that: include: A housing including a heat dissipation port; a fan, disposed in the housing, and comprising a first surface, a second surface opposite to the first surface, and an air outlet between the first surface and the second surface, the air outlet being disposed corresponding to the heat dissipation port; A first heat dissipation element extending from the first surface of the fan toward the heat dissipation port; A second heat sink extends from the second surface of the fan toward the heat dissipation port; At least one first conductive member is disposed away from the heat dissipation port and connects the first heat dissipation member and the second heat dissipation member; An antenna module as claimed in any one of claims 1 to 5, disposed in the housing and close to the heat dissipation port; and A second conductive element connects the antenna module and the first heat sink. The grounded radiator of the antenna module, the second conductive element, the first heat sink, the at least one first conductive element and the second heat sink form a loop.

7. The electronic device according to claim 6, wherein: The shell is made of a conductor, and the second heat sink is connected to the shell.

8. The electronic device as claimed in claim 6, characterized in that: Also includes: a screen, exposed outside the housing; as well as A third conductive element connects the second conductive element and the screen.

9. The electronic device as claimed in claim 6, characterized in that: The second conducting member is located outside the space between the first heat sink and the second heat sink, and the wind blown out by the fan passes through the space between the first heat sink and the second heat sink and the heat sink from the air outlet to leave the housing.

10. The electronic device as claimed in claim 6, characterized in that: The at least one first conductive member includes a plurality of first conductive members, the fan includes a third surface and a fourth surface located between and adjacent to the first surface and the second surface, and the plurality of first conductive members are disposed on the third surface and the fourth surface.

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