Antenna structure and electronic device

Abstract

The invention discloses an antenna structure and an electronic device. The antenna structure comprises a radiator and a feed source. The radiator comprises a plurality of radiating fins and a metal connecting part; the radiating fins are arranged at intervals and have the same fin length; the metal connecting part is connected with one end of each radiating fin; the feed-in source is arranged on one side of the radiating fins and is in signal connection with the radiator in one of a direct feed-in mode and a coupling feed-in mode. Therefore, according to the antenna structure, the heat dissipation fins are used as the radiation body, radiation of different frequency bands is contributed in a direct feed-in or coupling feed-in mode, the antenna size can be reduced, the coupling effect is improved, and the WLAN frequency band is considered.

Description

Technical Field

[0001] The invention relates to an antenna structure and an electronic device, and in particular to an antenna structure and an electronic device using a heat dissipation fin as a radiation body. Background Art

[0002] With the development of computer technology, notebook computers are getting smaller and smaller, and narrow-framed screens are becoming a trend. It is becoming increasingly difficult to set up antennas at the screen frame (AB panel side). Therefore, the prior art is to place antennas on both sides of the notebook computer's cooling fan. However, the above prior art requires a larger clearance area, and the antenna often pulls and interferes with the cooling device. Currently, the market lacks an antenna structure and electronic device that takes up little space, can improve coupling effects, and takes into account multiple frequency bands, so relevant industry players are all looking for solutions.

[0003] Therefore, it is necessary to provide an antenna structure and an electronic device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an antenna structure and an electronic device, which utilize heat dissipation fins as a radiation body to combine an antenna and a heat sink, thereby solving the problem that the conventional antenna and heat sink are placed separately and require a larger clearance area and cause mutual pulling and interference.

[0005] According to an embodiment of the structural aspect of the present invention, an antenna structure is provided, which includes a radiator and a feed source. The radiator includes a plurality of radiating fins and a metal connecting portion. These radiating fins are arranged at intervals from each other and have the same fin length. The metal connecting portion connects one end of each radiating fin. The feed source is arranged on one side of these radiating fins and is connected to the radiator in a direct feeding manner.

[0006] According to another embodiment of the structural state of the present invention, an antenna structure is provided, which includes a radiator, a feed source and an antenna unit. The radiator includes a plurality of heat sink fins and a metal connection portion. These heat sink fins are arranged at intervals from each other and have the same fin length. The metal connection portion connects one end of each heat sink fin. The feed source is arranged on one side of these heat sink fins. The antenna unit is connected to at least one of these heat sink fins and the feed source. The feed source is connected to the radiator in a coupled feeding manner.

[0007] According to another embodiment of the structural aspect of the present invention, an electronic device is provided, which includes a housing and an antenna structure. The antenna structure is disposed in the housing and includes a heat sink and a feeding source. The heat sink includes a plurality of heat sink fins and a metal connecting portion. These heat sink fins are arranged at intervals from each other and have the same fin length. The metal connecting portion connects one end of each heat sink fin. The feeding source is disposed on one side of these heat sink fins and is connected to the heat sink by a signal of a direct feeding method and a coupled feeding method.

[0008] Thus, the antenna structure of the present invention uses the heat dissipation fins as the radiation body and contributes radiation of different frequency bands by direct feeding or coupled feeding, which can reduce the antenna size, improve the coupling effect and take into account the wireless local area network (WLAN) frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram illustrating an antenna structure according to a first embodiment of the present invention;

[0010] Figure 2 Draw Figure 1 Equivalent schematic diagram of the antenna structure;

[0011] Figure 3 Draw Figure 1 A schematic diagram of a loop loss curve of an antenna structure;

[0012] Figure 4 A schematic diagram illustrating an antenna structure according to a second embodiment of the present invention;

[0013] Figure 5A A schematic diagram illustrating an antenna structure according to a third embodiment of the present invention;

[0014] Figure 5B Draw Figure 5A A schematic side view of an antenna structure;

[0015] Figure 5C Draw Figure 5A Another side view schematic diagram of the antenna structure;

[0016] Fig. 6A A schematic diagram illustrating an antenna structure according to a fourth embodiment of the present invention;

[0017] Figure 6B Draw Fig. 6A A schematic side view of an antenna structure;

[0018] Figure 7 A schematic diagram illustrating an antenna structure according to a fifth embodiment of the present invention; and

[0019] Figure 8A schematic diagram of an electronic device according to a sixth embodiment of the present invention is shown.

[0020] Main component symbols:

[0021] 100, 100a, 100b, 100c, 100d antenna structure

[0022] 110, 110a, 110d Radiator

[0023] 112, 112a, 112d, 112d2, 112d4 heat sink fins

[0024] 1122, 1122a, 1122b first fin

[0025] 1124 Second Fin

[0026] 114 Metal connection

[0027] 116 Fan

[0028] 118 Heat pipe

[0029] 120 Feed Source

[0030] 130, 130a Antenna unit

[0031] 132 Coupled Feed Antenna

[0032] 134 Insulator

[0033] 136 Connectors

[0034] 200 Electronic devices

[0035] 210 Shell

[0036] E1 First End

[0037] E2 Second End

[0038] FB1 First frequency band

[0039] FB2 Second frequency band

[0040] G Fin spacing

[0041] G1 First fin spacing

[0042] G2 Second fin spacing

[0043] GND Ground potential

[0044] H Fin height

[0045] L Fin length

[0046] La Feeding branch

[0047] P Feed connection point

[0048] R Region

[0049] T Fin thickness

[0050] W Total fin width

[0051] X, Y, Z axis DETAILED DESCRIPTION

[0052] The following will describe multiple embodiments of the present invention with reference to the accompanying drawings. When a certain element is "connected / signal-connected" to another element, it may refer to that the element is directly connected / signal-connected to the other element, or it may refer to that the element is indirectly connected / signal-connected to the other element, that is, there are other elements between the element and the other element. The terms "first", "second", "third", etc. are only used to describe different elements, and do not limit the elements themselves. Therefore, the first element may also be renamed as the second element.

[0053] See also Figure 1 , Figure 1 A schematic diagram of an antenna structure 100 according to a first embodiment of the present invention is shown. The antenna structure 100 includes a heat sink 110 and a feed source 120. The heat sink 110 includes a plurality of heat sink fins 112 and a metal connection portion 114. The heat sink fins 112 are arranged at intervals from each other and have the same fin length L (along the axial direction X). The metal connection portion 114 connects one end of each heat sink fin 112. The feed source 120 is arranged on one side of the heat sink fin 112 and is connected to the heat sink 110 in a direct feed manner.

[0054] In detail, these heat sink fins 112 have the same structure and are arranged in parallel, and the heat sink fins 112 are vertically connected to the metal connection portion 114. The direct feeding method is that the feeding source 120 signal is connected between two heat sink fins 112. The feeding source 120 includes a feeding end (positive end) and a grounding end (negative end), the feeding end is connected to one of the two heat sink fins 112, and the grounding end is at least connected to the other of the two heat sink fins 112.

[0055] In the present embodiment, each heat dissipating fin 112 has a fin thickness T (along the axial direction Y), and the fin thickness T is greater than or equal to 0.1 mm and less than or equal to 1 mm. There is a fin spacing G (along the axial direction Y) between two adjacent heat dissipating fins 112, and the fin spacing G is greater than or equal to 1 mm and less than or equal to 10 mm. Furthermore, these heat dissipating fins 112 also have a total fin width W (along the axial direction Y) and the same fin height H (along the axial direction Z). The fin length L is greater than or equal to 20 mm and less than or equal to 50 mm, the total fin width W is greater than or equal to 5 mm and less than or equal to 50 mm, and the fin height H is greater than or equal to 3 mm and less than or equal to 30 mm, but the present invention is not limited to the above.

[0056] Please also read Figure 1 and Figure 2 ,in Figure 2 Draw Figure 1 An equivalent schematic diagram of the antenna structure 100. The heat dissipation fins 112 of the antenna structure 100 are divided into a plurality of first fins 1122 and a plurality of second fins 1124 according to the feeding source 120. One of the first fins 1122 (i.e., a first fin 1122a) has a first end E1, a second end E2, and a feeding connection point P. The first end E1 is connected to the metal connection portion 114 and is relative to the second end E2. The feeding connection point P is located between the first end E1 and the second end E2 and is connected to the feeding source 120. The first fin 1122a is used to generate a high-frequency mode, and a feeding branch La is formed between the feeding connection point P and the second end E2. The remaining part of the first fin 1122 (i.e., four first fins 1122b) is separated from the feeding source 120 and is used to generate a low-frequency mode. Each first fin 1122b can be regarded as a coupled arm. In addition, at least one of the second fins 1124 is connected to a ground potential GND; in other words, the ground end of the feed source 120 can be connected to all or part of the second fins 1124. Thus, the present invention can form a coupled type antenna with multiple coupling arms through the first fin 1122 and the grounded second fin 1124. In addition, the present invention can adjust the low-frequency impedance matching and contribute part of the high-frequency mode by changing the fin height H, so as to achieve an operation similar to a patch antenna.

[0057] Please also read Figure 1 and Figure 3 ,in Figure 3 Draw Figure 1Schematic diagram of the loop loss curve of the antenna structure 100. The loop loss curve is the loop loss value (dB) of the antenna structure 100 corresponding to each frequency (GHz). The antenna structure 100 operates in a wireless local area network (Wireless Local Area Network; WLAN) frequency band, and the WLAN frequency band includes a first frequency band FB1 and a second frequency band FB2. The first frequency band FB1 is between 2.4GHz and 2.5GHz, and the second frequency band FB2 is between 5GHz and 7.125GHz. In other words, the loop loss value of the antenna structure 100 in the WLAN frequency band meets the specifications. Thereby, the antenna structure 100 of the present invention uses the heat sink fins 112 as the radiation body, and contributes to the radiation of different frequency bands by direct feeding, which can reduce the size of the antenna, improve the coupling effect and take into account the WLAN frequency band.

[0058] Please also read Figure 1 and Figure 4 ,in Figure 4 A schematic diagram of an antenna structure 100a according to a second embodiment of the present invention is shown. The antenna structure 100a includes a heat sink 110a and a feed source 120. The heat sink 110a includes a plurality of heat sink fins 112a and a metal connection portion 114. The heat sink fins 112a are divided into a plurality of first fins and a plurality of second fins according to the feed source 120. There is a first fin spacing G1 between two adjacent first fins, and there is a second fin spacing G2 between two adjacent second fins, and the first fin spacing G1 is different from the second fin spacing G2. In this embodiment, the first fin spacing G1 is greater than the second fin spacing G2. Figure 4 The antenna structure 100a is Figure 1 Thus, the antenna structure 100a of the present invention can change the frequency band contributed by each coupling arm by adjusting the fin spacing in a limited space, which can not only improve the operating bandwidth, but also independently operate the coupling effect of each coupling arm to meet the efficiency of each frequency band, thereby covering the WLAN range.

[0059] Please also read Figure 1 , Figure 5A , Figure 5B as well as Figure 5C ,in Figure 5A FIG. 1 is a schematic diagram showing an antenna structure 100 b according to a third embodiment of the present invention; Figure 5B Draw Figure 5A A schematic side view of an antenna structure 100b; and Figure 5C Draw Figure 5A The antenna structure 100b is another side view of the antenna structure 100b. The antenna structure 100b includes a radiator 110, a feed source 120 and an antenna unit 130. The structures of the radiator 110 and the feed source 120 are respectively similar to Figure 1The structures of the heat sink 110 and the feeding source 120 are the same and will not be described again. The antenna unit 130 is connected to at least one of the heat sink fins 112 and the feeding source 120. The feeding source 120 is connected to the heat sink 110 in a coupled feeding manner.

[0060] In detail, the coupling feeding method is that the feeding source 120 is connected to the heat sink 110 through the antenna unit 130. The antenna unit 130 includes a coupling feeding antenna 132, an insulator 134 and a connector 136. The coupling feeding antenna 132 is connected to the feeding source 120. The insulator 134 is connected between the coupling feeding antenna 132 and at least one of the heat sink fins 112. The feeding source 120 is connected to the heat sink fins 112 through the coupling feeding antenna 132. The connector 136 is connected between the coupling feeding antenna 132 and at least another one of the heat sink fins 112.

[0061] In this embodiment, the coupled-feed antenna 132 is a planar inverted-F antenna (PIFA), which is used to generate high-frequency modes. The insulator 134 is a sponge, and its thickness can be greater than or equal to 2 mm and less than or equal to 5 mm. The connecting member 136 can be a pogo pin, but the present invention is not limited to the above. In other embodiments, the coupled-feed antenna 132 can be a monopole antenna or a loop antenna.

[0062] Please also read Figure 5B , Fig. 6A as well as Figure 6B ,in Fig. 6A A schematic diagram illustrating an antenna structure 100c according to a fourth embodiment of the present invention; and Figure 6B Draw Fig. 6A The antenna structure 100c includes a radiator 110, a feed source 120 and an antenna unit 130a. The structures of the radiator 110 and the feed source 120 are respectively similar to Figure 5B The structures of the radiator 110 and the feeding source 120 are the same and will not be described again. The difference between the antenna unit 130a and the antenna unit 130 is that the antenna unit 130a only includes a coupled feeding antenna 132 and an insulator 134, but does not include a connecting member. The coupled feeding antenna 132 is a dipole antenna.

[0063] It is also worth mentioning that the heat sink 110 of the antenna structures 100b and 100c can be replaced by Figure 4The heat sink 110a of the antenna structure 100a enables the antenna structures 100b and 100c to change the frequency band and coupling effect contributed by each coupling arm by adjusting the fin spacing. Thus, the antenna structures 100b and 100c of the present invention use the heat sink fins 112 as the radiation body and contribute radiation of different frequency bands by coupling feeding, which can reduce the antenna size, improve the coupling effect and take into account the WLAN frequency band.

[0064] Please also read Figure 1 and Figure 7 ,in Figure 7 FIG. 1 is a schematic diagram of an antenna structure 100d according to a fifth embodiment of the present invention. The structure in a region R of the antenna structure 100d corresponds to Figure 1 The antenna structure 100d includes a heat sink 110d and a feeding source 120. The heat sink 110d includes a plurality of heat sink fins 112d, a fan 116, and a heat pipe 118. The fan 116 includes a metal connection portion 114; in other words, the metal connection portion 114 is a part of the fan 116 and is connected to the heat sink fins 112d. The heat pipe 118 is connected to a part of the heat sink fins 112d (i.e., the heat sink fins 112d2) and is separated from the feeding source 120. The fan 116 and the heat pipe 118 are used to dissipate the heat of the heat sink fins 112d, and the other part of the heat sink fins 112d (i.e., the heat sink fins 112d4) has a total fin width W. In addition, the fan 116 is made of metal material, and the heat dissipation fins 112d are overlapped with the fan 116, so that the fan 116 becomes the ground of the radiation device to integrate the environment to achieve better impedance matching. The heat pipe 118 is located on the right side of the area R, and there is no shielding on the left side of the area R to avoid interference. The heat pipe 118 is also made of metal material, and it is given a concession based on the total width W of the fins, and can be regarded as the ground of the radiation device. In addition, in other embodiments, the structure in the area R of the antenna structure 100d can be replaced with other forms (such as Figure 4 The antenna structure 100a, Figure 5A The antenna structure 100b or Fig. 6A The antenna structure 100c), but the present invention is not limited thereto.

[0065] Please also read Figure 7 and Figure 8 ,in Figure 8 A schematic diagram of an electronic device 200 according to a sixth embodiment of the present invention is shown. The electronic device 200 includes a housing 210 and an antenna structure 100d. The antenna structure 100d is disposed in the housing 210 (e.g., near the AB member in the housing 210). The heat dissipation path is for the fan 116 to suck in external air and then discharge it from above the heat dissipation fins 112d. In this embodiment, the electronic device 200 is a notebook computer, but the present invention is not limited thereto.

[0066] From the above implementation, it can be seen that the present invention has the following advantages: First, by using heat dissipation fins as the radiation body and contributing radiation of different frequency bands by direct feeding or coupled feeding, the antenna size can be reduced, the coupling effect can be improved, and the WLAN frequency band can be taken into account. Second, the antenna structure can change the frequency band contributed by each coupling arm by adjusting the fin spacing in a limited space, which can not only improve the operating bandwidth, but also independently operate the coupling effect of each coupling arm to meet the efficiency of each frequency band.

[0067] Although the present invention has been disclosed in the form of an implementation method as above, it is not intended to limit the present invention. Any technician in this field should be able to make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the invention should be based on the scope defined by the attached claims.

Claims

1. An antenna structure, comprising: A heat sink, comprising: A plurality of heat dissipation fins, the plurality of heat dissipation fins are spaced apart from each other and have the same fin length; and a metal connecting portion, the metal connecting portion connecting one end of each of the heat dissipation fins; and A feeding source is arranged at one side of the heat dissipation fins and is connected to the heat sink in a direct feeding manner.

2. The antenna structure as described in claim 1, wherein the heat sink fins have the same structure and are arranged in parallel, the heat sink fins are vertically connected to the metal connecting part, and the direct feeding method is that the feeding source signal is connected between two of the heat sink fins.

3. The antenna structure according to claim 1, wherein: Each of the heat dissipation fins has a fin thickness, and the fin thickness is greater than or equal to 0.1 mm and less than or equal to 1 mm; and There is a fin interval between two adjacent heat dissipation fins, and the fin interval is greater than or equal to 1 mm and less than or equal to 10 mm.

4. The antenna structure as described in claim 1, wherein the heat dissipation fins also have a total fin width and the same fin height, the fin length is greater than or equal to 20 mm and less than or equal to 50 mm, the total fin width is greater than or equal to 5 mm and less than or equal to 50 mm, and the fin height is greater than or equal to 3 mm and less than or equal to 30 mm.

5. The antenna structure as claimed in claim 4, wherein the heat sink further comprises: a fan, the fan comprising the metal connecting portion and connected to the heat dissipation fins; as well as a heat pipe connected to a portion of the heat dissipation fins and separated from the feed source; The fan and the heat pipe are used to dissipate the heat of the heat dissipation fins, and another part of the heat dissipation fins has the total width of the fins.

6. The antenna structure as claimed in claim 1, wherein the heat dissipation fins are divided into a plurality of first fins and a plurality of second fins according to the feeding source area; in, One of the first fins has a first end, a second end and a feeding connection point, the first end is connected to the metal connection portion and opposite to the second end, the feeding connection point is located between the first end and the second end and connected to the feeding source, the one of the first fins is used to generate a high-frequency mode, a feeding branch is formed between the feeding connection point and the second end, and a remaining portion of the first fins is separated from the feeding source and is used to generate a low-frequency mode; At least one of the second fins is connected to a ground potential. 7 . The antenna structure as described in claim 6 , wherein there is a first fin interval between two adjacent ones of the first fins, and there is a second fin interval between two adjacent ones of the second fins, and the first fin interval is different from the second fin interval.

8. The antenna structure as described in claim 1, wherein the antenna structure operates in a wireless local area network frequency band, the wireless local area network frequency band includes a first frequency band and a second frequency band, the first frequency band is between 2.4 GHz and 2.5 GHz, and the second frequency band is between 5 GHz and 7.125 GHz.

9. An antenna structure, comprising: A heat sink, comprising: A plurality of heat dissipation fins, the plurality of heat dissipation fins are spaced apart from each other and have the same fin length; and A metal connecting portion connected to one end of each of the heat dissipation fins; a feeding source, the feeding source being disposed on one side of the heat dissipation fins; and An antenna unit connected to at least one of the heat dissipation fins and the feed source; The feeding source is connected to the heat sink in a coupled feeding manner.

10. The antenna structure as claimed in claim 9, wherein the heat sink fins have the same structure and are arranged in parallel, the heat sink fins are vertically connected to the metal connecting portion, and the coupling feeding method is that the feeding source is connected to the radiator through the antenna unit signal.

11. The antenna structure according to claim 9, wherein: Each of the heat dissipation fins has a fin thickness, and the fin thickness is greater than or equal to 0.1 mm and less than or equal to 1 mm; and There is a fin interval between two adjacent heat dissipation fins, and the fin interval is greater than or equal to 1 mm and less than or equal to 10 mm.

12. The antenna structure as described in claim 9, wherein the heat dissipation fins also have a total fin width and the same fin height, the fin length is greater than or equal to 20 mm and less than or equal to 50 mm, the total fin width is greater than or equal to 5 mm and less than or equal to 50 mm, and the fin height is greater than or equal to 3 mm and less than or equal to 30 mm.

13. The antenna structure as claimed in claim 12, wherein the heat sink further comprises: a fan, the fan comprising the metal connecting portion and connected to the heat dissipation fins; as well as a heat pipe connected to a portion of the heat dissipation fins and separated from the feed source; The fan and the heat pipe are used to dissipate the heat of the heat dissipation fins, and another part of the heat dissipation fins has the total width of the fins.

14. The antenna structure as claimed in claim 9, wherein the antenna structure operates in a wireless local area network frequency band, the wireless local area network frequency band includes a first frequency band and a second frequency band, the first frequency band is between 2.4 GHz and 2.5 GHz, and the second frequency band is between 5 GHz and 7.125 GHz.

15. The antenna structure as claimed in claim 9, wherein the antenna unit comprises: a coupled-feed antenna connected to the feed source; as well as an insulator connected between the coupling-fed antenna and at least one of the heat dissipation fins; The feeding source is connected to the heat dissipation fins via the coupled feeding antenna signal.

16. The antenna structure as claimed in claim 15, wherein the antenna unit further comprises: A connecting member is connected between the coupling-fed antenna and at least another one of the heat dissipation fins.

17. The antenna structure as described in claim 9, wherein the heat dissipation fins include a plurality of first fins and a plurality of second fins, a first fin spacing is provided between two adjacent ones of the first fins, a second fin spacing is provided between two adjacent ones of the second fins, and the first fin spacing is different from the second fin spacing.

18. An electronic device, comprising: a housing; as well as An antenna structure is disposed on the housing and comprises: A heat sink, comprising: A plurality of heat dissipation fins, the plurality of heat dissipation fins are spaced apart from each other and have the same fin length; and a metal connecting portion, the metal connecting portion connecting one end of each of the heat dissipation fins; and A feeding source is arranged at one side of the heat dissipation fins and is connected to the heat sink in a direct feeding mode or a coupled feeding mode.

19. The electronic device as claimed in claim 18, wherein the heat sink fins have the same structure and are arranged in parallel, the heat sink fins are vertically connected to the metal connecting portion, and the feeding source is connected to the heat sink in a direct feeding manner, wherein the direct feeding manner is that the feeding source signal is connected between two of the heat sink fins.

20. The electronic device as claimed in claim 18, further comprising: An antenna unit connected to at least one of the heat dissipation fins and the feed source; Among them, the heat sink fins have the same structure and are arranged in parallel, the heat sink fins are vertically connected to the metal connecting part, and the feeding source is connected to the radiator by the coupled feeding method, and the coupled feeding method is that the feeding source is connected to the radiator through the antenna unit signal.

Images