Antenna module

Abstract

The utility model discloses an antenna module. The antenna module comprises a grounding part, a first radiation part, a first feed-in part, a second radiation part and a second feed-in part, the grounding part comprises an upper grounding part, a lower grounding part and a connecting part, and the connecting part is connected with the upper grounding part and the lower grounding part; the first radiation part excites a first radiation frequency band, and the first radiation part is arranged on the first side of the upper grounding part; the first feed-in part is connected to the first radiation part and is connected with the lower grounding part; the second radiation part excites a second radiation frequency band, and the second radiation part is arranged on the second side of the upper grounding part; the second feed-in part is connected to the second radiation part and is connected with the lower grounding part; the first side and the second side of the upper grounding part are adjacent, and the first radiation part and the second radiation part are arranged on the two sides of the connecting part respectively. According to the antenna module disclosed by the invention, the problem of insufficient space for placing the antennas in the prior art can be solved, and a plurality of antennas can be arranged in a limited space under the condition of considering the isolation degree.

Description

Technical Field

[0001] The present application relates to an antenna module, and particularly to a dual-fed antenna module. Background Art

[0002] The wireless network speed of the seventh-generation WiFi (WiFi 7) can reach up to 30 Gbps, which is more than three times the highest rate of 9.6 Gbps of the sixth-generation WiFi (WiFi 6). Compared with Wi-Fi 6, WiFi 7 can support up to 16 data streams at most. Secondly, in addition to the traditional 2.4 GHz and 5 GHz bands, WiFi 7 will also newly support the 6 GHz band, and the three bands can work simultaneously.

[0003] With the development of the wireless communication WiFi-7, in order to have a faster transmission rate, the antennas used on wireless access points in the range of 5925 MHz to 7125 MHz will gradually increase. However, in devices of the same size, the space for placing multiple antennas will be insufficient, and the issue of isolation between antennas also needs to be considered.

[0004] For example, the length, width, and height dimensions of an antenna module using a frequency band of 5925 MHz to 7125 MHz in the prior art may be 22 mm, 22 mm, and 5.8 mm respectively. Considering that two antenna modules require an isolation of -20 dB, when assembling two antenna modules, the two antenna modules must be 18.5 mm apart, so that the overall width required is 62.5 mm. As the device size gradually develops towards miniaturization, it is necessary to correspondingly provide an antenna module with multiple feeding points or multiple frequencies and reduced size at the same time. Summary of the Utility Model

[0005] The present application proposes an antenna module to solve the problem of insufficient space for placing antennas in the prior art, and multiple feeding points or multi-frequency antennas can be set in a limited space while taking into account the isolation.

[0006] The antenna module disclosed according to an embodiment of the present application includes: a grounding portion, a first radiation portion, a first feeding portion, a second radiation portion, and a second feeding portion. The grounding portion includes an upper grounding portion, a lower grounding portion, and a connecting portion, and the connecting portion connects the upper grounding portion and the lower grounding portion; the first radiation portion excites a first radiation frequency band, and the first radiation portion is disposed on a first side of the upper grounding portion; the first feeding portion is connected to the first radiation portion and is connected to the lower grounding portion; the second radiation portion excites a second radiation frequency band, and the second radiation portion is disposed on a second side of the upper grounding portion; the second feeding portion is connected to the second radiation portion and is connected to the lower grounding portion; the first side and the second side of the upper grounding portion are adjacent, and the first radiation portion and the second radiation portion are respectively disposed on both sides of the connecting portion.

[0007] In one embodiment, the first radiation portion and the second radiation portion are orthogonally arranged.

[0008] In one embodiment, the first radiation portion includes a first main radiator, a first front-end radiator, and a first rear-end radiator. The first front-end radiator and the first rear-end radiator are disposed on opposite sides of the first main radiator. The second radiation portion includes a second main radiator, a second front-end radiator, and a second rear-end radiator. The second front-end radiator and the second rear-end radiator are disposed on opposite sides of the second main radiator.

[0009] In one embodiment, the distance between the first feeding portion and the first front-end radiator is smaller than the distance between the first feeding portion and the first rear-end radiator.

[0010] In one embodiment, the length of the first front-end radiator is greater than the length of the first rear-end radiator.

[0011] In one embodiment, the length of the first front-end radiator or the second front-end radiator is between 4.9 mm and 6.9 mm.

[0012] In one embodiment, the length of the first rear-end radiator or the second rear-end radiator is between 0.7 mm and 2.7 mm.

[0013] In one embodiment, an isolation portion is further included. The isolation portion is disposed on the lower grounding portion. The first radiation portion is disposed between the isolation portion and the second radiation portion, and the second radiation portion is disposed between the isolation portion and the first radiation portion.

[0014] In one embodiment, the isolation portion includes a first isolation portion and a second isolation portion. The first radiation portion is disposed between the first isolation portion and the second radiation portion, and the second radiation portion is disposed between the second isolation portion and the first radiation portion.

[0015] In one embodiment, the height of the isolation portion is between 6.7 mm and 8.7 mm.

[0016] According to the antenna module disclosed in the embodiments of the present application, two single-frequency antennas can be integrated with a relatively small size, without significantly increasing the overall size of the antenna module. At the same time, a good isolation degree between the two radiation portions is maintained, increasing the application diversity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application. The schematic embodiments and descriptions in the drawings are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0018] Figure 1 is a perspective view of an antenna module according to an embodiment of the present invention;

[0019] Figure 2 is another perspective view of an antenna module according to an embodiment of the present invention;

[0020] Figure 3 is a side view of an antenna module according to an embodiment of the present invention;

[0021] Figure 4 is another side view of the antenna module according to an embodiment of the present invention;

[0022] Figure 5 shows the operating frequency bands with and without an isolation portion and the isolation degree difference of the antenna module disclosed in the present application;

[0023] Figure 6 illustrates the influence of the height of the isolation portion on the operating frequency band and the isolation degree;

[0024] Figure 7 shows the influence of the lengths of the first front-end radiator and the second front-end radiator on the operating frequency band and the isolation degree;

[0025] Figure 8 shows the influence of the lengths of the first rear-end radiator and the second rear-end radiator on the operating frequency band and the isolation degree; and

[0026] Figure 9 and Figure 10 shows that when the operating frequency of the antenna module according to the embodiment of the present application is between 5925 MHz and 7125 MHz, the impedance can be below -10 dB and the isolation degree can be lower than -20 dB. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0028] It should be noted that in this document, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0029] It must be understood that when a component is described as "connected" to another component, it may be directly connected to other components or intermediate components may occur. Conversely, when a component is described as "directly connected" to another component, there are no intermediate components. Other words used to describe the relationship between components can be interpreted in a similar manner.

[0030] Reference Figures 1 to 4, the antenna module disclosed according to the embodiments of the present application is a dual-feed antenna. Figure 1 It is a perspective view of an antenna module according to an embodiment of the present invention. Figure 2 It is another perspective view of an antenna module according to an embodiment of the present invention. Figure 3 It is a side view of an antenna module according to an embodiment of the present invention. Figure 4 It is another side view of an antenna module according to an embodiment of the present invention.

[0031] Figures 1 to 4 An embodiment of the illustrated antenna module includes a ground portion 30, a first radiation portion 10, a second radiation portion 20, a first feeding portion 16, and a second feeding portion 26. The ground portion 30, the first radiation portion 10, the second radiation portion 20, the first feeding portion 16, and the second feeding portion 26 can be integrally formed.

[0032] The ground portion 30 includes an upper ground portion 31, a lower ground portion 32, and a connecting portion 33, and the three can be integrally formed. The upper ground portion 31 and the lower ground portion 32 are generally quadrilateral. The upper ground portion 31 has a first side 311, a second side 312, a third side 313, and a fourth side 314. The first side 311 is adjacent to the second side 312 and the third side 313. The second side 312 is adjacent to the first side 311 and the fourth side 314. Similarly, the lower ground portion 32 has corresponding first side 321, second side 322, third side 323, and fourth side 324. The first side 321 is adjacent to the second side 322 and the third side 323. The second side 322 is adjacent to the first side 321 and the fourth side 324. The connecting portion 33 connects the upper ground portion 31 and the lower ground portion 32. Specifically, the connecting portion 33 is connected between the third sides 313, 323 and the fourth sides 314, 324 of the upper ground portion 31 and the lower ground portion 32. In this embodiment, there is a fifth side 315 between the third side 313 and the fourth side 314 of the upper ground portion 31, and there is a fifth side 325 between the third side 323 and the fourth side 324 of the lower ground portion 32. The connecting portion 33 extends from the fifth side 315 of the upper ground portion 31 to the fifth side 325 of the lower ground portion 32, but the present application is not limited thereto. Preferably, the area of the lower ground portion 32 is larger than that of the upper ground portion 31.

[0033] The first radiation part 10 and the second radiation part 20 are respectively arranged on both sides of the connecting part 30. Specifically, the first radiation part 10 is arranged on the first side 311 of the upper grounding part 31 and can be formed by extending from the first side 311 of the upper grounding part 31. The first radiation part 10 includes a first main radiator 11, a first front-end radiator 12 and a first rear-end radiator 13. The first radiation part 10 excites a first radiation frequency band (for example, 5.9 GHz to 7.2 GHz). The first front-end radiator 12 and the first rear-end radiator 13 are arranged on opposite sides of the first main radiator 11, and the length of the first front-end radiator 12 is greater than the length of the first rear-end radiator 13.

[0034] More specifically, the first main radiator 11 is generally trapezoidal, including an upper base 112, a lower base 111 and waists 113, 114. The upper base 112 of the first main radiator 11 is connected to the first side 311 of the upper grounding part 31. The first rear-end radiator 13 extends from one waist 113 in the negative X direction, and the first front-end radiator 12 extends from the other waist 114 in the positive X direction.

[0035] The second radiation part 20 is arranged on the second side 312 of the upper grounding part 31 and can be formed by extending from the second side 312 of the upper grounding part 31. The second radiation part 20 includes a second main radiator 21, a second front-end radiator 22 and a second rear-end radiator 23. The second radiation part 20 excites a second radiation frequency band (for example, 5.9 GHz to 7.2 GHz). The second front-end radiator 22 and the second rear-end radiator 23 are arranged on opposite sides of the second main radiator 21, and the length of the second front-end radiator 22 is greater than that of the second rear-end radiator 23.

[0036] More specifically, the second main radiator 21 is generally trapezoidal, including an upper base 212, a lower base 211 and waists 213, 214. The upper base 212 of the second main radiator 21 is connected to the second side 312 of the upper grounding part 31. The second rear-end radiator 23 extends from one waist 213 in the positive Y direction, and the second front-end radiator 22 extends from the other waist 214 in the negative Y direction.

[0037] The first front-end radiator 12 and the second front-end radiator 22 face each other, so that the first radiation part 10 and the second radiation part 20 are generally orthogonally arranged (90 ± 10 degrees), so that the electric field polarization directions of the first radiation part 10 and the second radiation part 20 are perpendicular to each other by about 90 degrees, which can increase the isolation degree of the antenna module of the present application. Such a configuration method can have good isolation without having to arrange the first radiation part 10 and the second radiation part 20 far apart.

[0038] In addition, the antenna module further includes a first feeding portion 16 and a second feeding portion 26. The first feeding portion 16 feeds a first radiation signal, and a first radiation frequency band is excited by the first radiation portion 10. The second feeding portion 26 feeds a second radiation signal, and a second radiation frequency band is excited by the second radiation portion 20. The first feeding portion 16 is connected to the first radiation portion 10 and is connected to the lower grounding portion 32. The second feeding portion 26 is connected to the second radiation portion 20 and is connected to the lower grounding portion 32. Specifically, the first feeding portion 16 is disposed on a side (lower bottom 111) of the first main radiator 11 close to the lower grounding portion 32. Therefore, the distance between the first feeding portion 16 and the first front-end radiator 12 is smaller than the distance between the first feeding portion 16 and the first rear-end radiator 13. The first feeding portion 16 can be integrally formed with the first radiation portion 10. The second feeding portion 26 is disposed on a side (lower bottom 211) of the second main radiator 21 close to the lower grounding portion 32. Therefore, the distance between the second feeding portion 26 and the second front-end radiator 22 is smaller than the distance between the second feeding portion 26 and the second rear-end radiator 23. The second feeding portion 26 can be integrally formed with the second radiation portion 20.

[0039] In another embodiment, the antenna module further includes an isolation portion. For the sake of simplicity, it is drawn together in Figures 1 to 4 and is not intended to limit the two to the same embodiment.

[0040] The isolation portion includes, for example, a first isolation portion 15 and a second isolation portion 25. The first isolation portion 15 is connected to the third side 323 of the lower grounding portion 32 and is disposed corresponding to the first radiation portion 10; the second isolation portion 25 is connected to the fourth side 324 of the lower grounding portion 32 and is disposed corresponding to the second radiation portion 20. The first isolation portion 15 and the second isolation portion 25 are respectively on two sides of the connecting portion 33 and are not connected to the third side 313 and the fourth side 314 of the upper grounding portion 31. The first isolation portion 15 and / or the second isolation portion 25 can be integrally formed with the lower grounding portion 32.

[0041] For the antenna module disclosed in the present application, a first isolation portion 15 and a second isolation portion 25 are respectively disposed corresponding to the first radiation portion 10 and the second radiation portion 20 to improve the isolation degree between the first radiation portion 10 and the second radiation portion 20. The first radiation portion 10 is disposed between the first isolation portion 15 and the second radiation portion 20, and the second radiation portion 20 is disposed between the second isolation portion 25 and the first radiation portion 10. On the premise of improving the isolation degree, the required distance between the first radiation portion 10 and the second radiation portion 20 can be shortened, so as to arrange a dual-fed antenna with the saved space.

[0042] Furthermore, the isolation degree required by the antenna module can be adjusted by adjusting the height H of the isolation parts (the first isolation part 15 and the second isolation part 25), the length LF of the first front-end radiator 12 and the second front-end radiator 22, and the length LR of the first rear-end radiator 13 and the second rear-end radiator 23. Generally, the isolation degree is recommended to be below -15 dB, and preferably below -20 dB.

[0043] According to the structure described above, for the antenna module of a specific embodiment of the present application, the first radiation part 10 and the second radiation part 20 can at least respectively excite specific operating frequency bands. Taking the case where both of their operating frequency bands are from 5925 MHz to 7125 MHz and considering an isolation degree of -20 dB as an example, the dimensions of the length, width, and height of the antenna module of the present application can be set to 35 mm * 35 mm (the size of the lower grounding part 32) * 10.4 mm. Therefore, the present application can directly use an integrally formed antenna, and can obtain the dual-feed effect of two antennas in the prior art without changing the size, and can reduce the necessary space of the device relative to the combination of two antennas in the prior art.

[0044] The size parameters that can be adjusted for the antenna module disclosed in the present application are respectively the length LF of the first front-end radiator 12 and the second front-end radiator 22, the length LR of the first rear-end radiator 13 and the second rear-end radiator 23, and the height H of the first isolation part 15 and the second isolation part 25. The following actual test data of the antenna module disclosed in the present application are used to illustrate these adjustable size parameters.

[0045] First, verify the effect of the isolation parts (the first isolation part 15 and the second isolation part 25) configured in the antenna module disclosed in the present application. Refer to Figure 5 , which shows the operating frequency bands and the isolation degree differences of the antenna module of the present application with and without the isolation parts. It can be found from Figure 5 that through the setting of the isolation parts, an isolation degree of at least -20 dB can be achieved between the operating frequency bands of 5.8 GHz and 7.2 GHz. In contrast, when the first isolation part 15 and the second isolation part 25 are removed so that the antenna module does not have the isolation parts, although the frequency band with an isolation degree lower than -20 dB is slightly reduced, an isolation degree of at least -15 dB can still be achieved between the operating frequency bands of 5.7 GHz and 7.4 GHz. Therefore, it can be known that the setting of the isolation parts in the present application can improve the isolation degree effect between at least the operating frequency bands of 5.8 GHz and 7.2 GHz.

[0046] Figure 6 Illustrate the influence of the height H of the isolation parts on the operating frequency bands and the isolation degree.

[0047] The height H of the first isolation part 15 and the second isolation part 25 in the present application is based on 7.7 mm, Figure 6Observe the influence of gradually increasing or decreasing the observation height by 0.5 mm on the frequency band and isolation degree, that is, test the influence of the height H of the first isolation part 15 and the second isolation part 25 between 6.7 mm, 7.2 mm, 7.7 mm, 8.2 mm, and 8.7 mm. Observe Figure 6 From the test results, when the height of the isolation part is 7.7 mm, the isolation degree of the operating frequency band from 5.8 GHz to 7.1 GHz can reach -20 dB. When the height of the isolation part increases, the operating frequency band with an isolation degree of -20 dB will gradually shift to the lower frequency, but the isolation degree can be optimized; for example, when the height is 8.2 mm, the best isolation degree can reach -65 dB. When the height of the isolation part decreases, the operating frequency band with an isolation degree of -20 dB will gradually shift to the higher frequency, and the best isolation degree decreases. Although the isolation degree decreases, the isolation part with a height between 6.7 mm and 8.7 mm can still maintain an isolation degree below -20 dB in the frequency band from 5.9 GHz to 7.2 GHz.

[0048] Figure 7 Show the influence of the length LF of the first front-end radiator 12 and the second front-end radiator 22 on the operating frequency band and isolation degree.

[0049] The length LF of the first front-end radiator 12 and the second front-end radiator 22 is based on 5.9 mm, and observe the influence of gradually increasing or decreasing the length by 0.5 mm on the frequency band and isolation degree, that is, test the influence of the length LF of the first front-end radiator 12 and the second front-end radiator 22 between 4.9 mm, 5.4 mm, 5.9 mm, 6.4 mm, and 6.9 mm. Observe Figure 7 It can be known that the length LF of the first front-end radiator 12 and the second front-end radiator 22 has the best isolation degree at 5.9 mm in the frequency band from 5.9 GHz to 7.2 GHz. Whether the length LF of the first front-end radiator 12 and the second front-end radiator 22 increases or decreases will affect the isolation degree, making the frequency band meeting -20 dB narrower, especially when the length LF of the first front-end radiator 12 and the second front-end radiator 22 increases.

[0050] Figure 8 Show the influence of the length LR of the first rear-end radiator 13 and the second rear-end radiator 23 on the operating frequency band and isolation degree.

[0051] The length LR of the first rear-end radiator 13 and the second rear-end radiator 23 is based on 1.7 mm, and observe the influence of gradually increasing or decreasing the length by 0.5 mm on the frequency band and isolation degree, that is, test the influence of the length LR of the first rear-end radiator 13 and the second rear-end radiator 23 between 0.7 mm, 1.2 mm, 1.7 mm, 2.2 mm, and 2.7 mm. Observe Figure 8It can be known that the lengths LR of the first rear-end radiator 13 and the second rear-end radiator 23 perform best in terms of isolation at 1.2 mm in the frequency band from 5.9 GHz to 7.2 GHz. Whether the lengths of the first rear-end radiator 13 and the second rear-end radiator 23 increase or decrease, it will affect the isolation and narrow the frequency band that meets -20 dB. However, the isolation can still be maintained below -20 dB in the frequency band from 5.9 GHz to 7.2 GHz.

[0052] Basically, the sum of the length LF of the first front-end radiator 12 and the length LR of the first rear-end radiator 13 can be fixed, that is, the lengths of the two can be adjusted complementarily. The same applies to the length LF of the second front-end radiator 22 and the length LR of the second rear-end radiator 23.

[0053] From the above data, an optimal antenna configuration can be selected, that is, the height H of the first isolation part 15 and the second isolation part 25 is 7.7 mm, the length LF of the first front-end radiator 12 and the second front-end radiator 22 is 5.9 mm, and the length LR of the first rear-end radiator 13 and the second rear-end radiator 23 is 1.2 mm. The antenna module with this size performs as Figures 9 to 10 shown, and it can be known from Figure 9 that when the operating frequency band is between 5.9 GHz and 7.2 GHz, the impedance can be below -10 dB, and it can be known from Figure 10 that the isolation can be below -20 dB.

[0054] Therefore, in actual applications, the antenna module of the present application can be used as a dual-fed antenna through the settings of the first radiation part and the second radiation part, such as being used in the antenna of WiFi 7. Although the embodiments of the present application are described with symmetric first and second radiation parts, those skilled in the art can understand that asymmetric first and second radiation parts can be set, such as adjusting the heights of the first isolation part and the second isolation part, the lengths of the first front-end radiator and the second front-end radiator, and the lengths of the first rear-end radiator and the second rear-end radiator, etc., so that the first radiation part and the second radiation part can excite different frequency bands, enabling the antenna module of the present application to be used in dual-band applications. In addition, the present application can improve the isolation of the antenna by arranging the first radiation part and the second radiation part to be approximately 90 degrees or through the setting of the isolation part. In summary, the antenna module of the present application can effectively save the area occupied by the antenna in the device and achieve an effective antenna impedance bandwidth.

[0055] It can also be known from the above description that the dimensions mentioned in the present application can be increased or decreased by 0.5 mm and 1 mm, and it will not significantly affect the radiation effect of the antenna module disclosed in the present application. In addition, although the present application is described with actual parameter values, those skilled in the art should understand that the proportional relationships between the parameters are also covered within the scope of the patent of the present application.

[0056] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the purpose of the present application and the scope protected by the scope of the patent application, can also make many variations, all of which fall within the protection scope of the present application.

Claims

1. An antenna module, characterized in that, Comprising: A grounding part, the grounding part includes an upper grounding part, a lower grounding part and a connecting part, and the connecting part connects the upper grounding part and the lower grounding part; A first radiation part, the first radiation part excites a first radiation frequency band, and the first radiation part is arranged on a first side of the upper grounding part; A first feeding part, connected to the first radiation part and connected to the lower grounding part; A second radiation part, the second radiation part excites a second radiation frequency band, and the second radiation part is arranged on a second side of the upper grounding part; A second feeding part, connected to the second radiation part and connected to the lower grounding part; The first side and the second side of the upper grounding part are adjacent, and the first radiation part and the second radiation part are respectively arranged on both sides of the connecting part.

2. The antenna module according to claim 1, characterized in that, The first radiation part and the second radiation part are arranged orthogonally.

3. The antenna module according to claim 1, wherein The first radiation part includes a first main radiator, a first front-end radiator and a first rear-end radiator, the first front-end radiator and the first rear-end radiator are arranged on opposite sides of the first main radiator, the second radiation part includes a second main radiator, a second front-end radiator and a second rear-end radiator, and the second front-end radiator and the second rear-end radiator are arranged on opposite sides of the second main radiator.

4. The antenna module according to claim 3, wherein The distance between the first feeding part and the first front-end radiator is smaller than the distance between the first feeding part and the first rear-end radiator.

5. The antenna module according to claim 3, characterized in that, The length of the first front-end radiator is greater than the length of the first rear-end radiator.

6. The antenna module according to claim 3, wherein The length of the first front-end radiator or the second front-end radiator is between 4.9 mm and 6.9 mm.

7. The antenna module according to claim 3, wherein The length of the first rear-end radiator or the second rear-end radiator is between 0.7 mm and 2.7 mm.

8. The antenna module according to claim 1, wherein, Further comprising an isolation part, the isolation part is arranged on the lower grounding part, the first radiation part is arranged between the isolation part and the second radiation part, and the second radiation part is arranged between the isolation part and the first radiation part.

9. The antenna module according to claim 8, wherein, The isolation part includes a first isolation part and a second isolation part, the first radiation part is arranged between the first isolation part and the second radiation part, and the second radiation part is arranged between the second isolation part and the first radiation part.

10. The antenna module according to claim 8, wherein The height of the isolation part is between 6.7 mm and 8.7 mm.

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