Fifth generation mobile communication antenna module with improved isolation

Abstract

The application discloses a fifth-generation mobile communication antenna module with improved isolation, which comprises a substrate, a first main antenna, a second main antenna and an auxiliary antenna. The first main antenna and the second main antenna are arranged at two ends of the substrate, and the auxiliary antenna is arranged between the two. The first main antenna has a first radiation part and a second radiation part. The first radiation part has a first feeding end, and the second radiation part has a first grounding end. The first feeding end is not in contact with a first feeding line and constitutes a coupling feeding. The second radiation part is coupled with the first radiation part. The second main antenna has a third radiation part and a fourth radiation part. The third radiation part has a second feeding end, and the fourth radiation part has a second grounding end. The second feeding end is not in contact with a second feeding line and constitutes a coupling feeding. The first and second grounding ends are connected with the ground. The fourth radiation part is coupled with the third radiation part. The auxiliary antenna has a third feeding end. The third feeding end is not in contact with a third feeding line and constitutes a coupling feeding. The application improves the isolation among the three kinds of antennas.

Description

TECHNICAL FIELD

[0001] The present application relates to an antenna module, in particular to a fifth generation mobile communication antenna module with improved isolation. BACKGROUND

[0002] The wireless communication technology of the existing mobile device includes the scope of wireless local area network (WLAN) and wireless wide area network (WWAN). The wireless local area network is the wireless communication specification required for the existing notebook computer, and the wireless wide area network includes 2G, 3G, 4G LTE and 5G. In the case that the notebook computer brand further uses the performance specification of 5G, the operating bandwidth of the antenna is further increased.

[0003] The 5G communication specification of the notebook computer is currently mainly in the 5G sub-6 frequency band. However, in the case that the existing design does not include the 5G sub-6 frequency band, the antenna module needs to be used in the multiple input multiple output (MIMO) case, and the requirement for antenna isolation is quite high, and it is very difficult to design a built-in antenna. If the 5G sub-6 frequency band is added, the bandwidth is increased and the isolation requirement is maintained under the same size limit of the antenna, which is a very challenging challenge. SUMMARY

[0004] In view of the above technical defects of the prior art, the task of the present application is to provide a fifth generation mobile communication antenna module with improved isolation, which meets the isolation requirement of the three antennas in the module under the size limitation of the single built-in module antenna of the traditional notebook computer.

[0005] The technical scheme of the present application is as follows: a fifth generation mobile communication antenna module with improved isolation, comprising:

[0006] a substrate having a first end and a second end opposite to each other;

[0007] a first main antenna disposed on the substrate and close to the first end, having a first radiation part and a second radiation part, the first radiation part having a first feed end, the second radiation part having a first ground end, wherein the first feed end is not in contact with the first feed line and constitutes a coupled feed, the first ground end is connected to a ground, and the second radiation part is coupled to the first radiation part;

[0008] a second main antenna disposed on the substrate and close to the second end, having a third radiation part and a fourth radiation part, the third radiation part having a second feed end, the fourth radiation part having a second ground end, wherein the second feed end is not in contact with the second feed line and constitutes a coupled feed, the second ground end is connected to the ground, and the fourth radiation part is coupled to the third radiation part; and

[0009] An auxiliary antenna is disposed on the substrate and located between the first main antenna and the second main antenna, and has a third feed end which is not in contact with the third feed line and forms a coupled feed.

[0010] Further, the substrate is in a long strip shape, and the first end and the second end are opposite to each other with a distance equal to the length of the long side of the substrate.

[0011] Further, the first radiation part further includes a first branch and a second branch, and the first branch and the second branch are connected to the first feed end respectively.

[0012] Further, the fourth radiation part further includes a third ground end, and the third ground end is connected to the ground, and the second ground end and the third ground end are parallel to each other.

[0013] Further, the coupled feed formed by the first feed end and the coupled feed formed by the third feed end are used to improve the isolation between the first main antenna and the auxiliary antenna.

[0014] Further, the first radiation part is located between the first ground end of the second radiation part and the auxiliary antenna.

[0015] Further, the second radiation part has an extended end, and the extended end is located between the first radiation part and the auxiliary antenna, and is used to improve the isolation between the first main antenna and the auxiliary antenna.

[0016] Further, the second ground end of the fourth radiation part is located between the third radiation part and the auxiliary antenna.

[0017] Further, the third radiation part is closer to the ground than the fourth radiation part, and the third radiation part and the fourth radiation part extend in opposite directions.

[0018] Further, the auxiliary antenna further has a fifth radiation part, the fifth radiation part and the fourth radiation part extend in the same direction, and the fifth radiation part and the third radiation part extend in opposite directions, and are used to improve the isolation between the second main antenna and the auxiliary antenna.

[0019] Further, the second feed line and the third feed line are both connected to a ground conductor, and the ground conductor has a slot, and the connection between the second ground end and the ground conductor is located on the right side of the slot, and the connection between the ground part of the auxiliary antenna and the ground conductor is located on the left side of the slot, and are used to improve the isolation between the second main antenna and the auxiliary antenna.

[0020] Compared with the prior art, the application has the advantages of:

[0021] The fifth generation mobile communication antenna module with improved isolation degree provided by the application has high industrial application value. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0023] Figure 2 is a front view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0024] Figure 3 is a rear view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0025] Figure 4 is a top view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0026] Figure 5 is a bottom view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0027] Figure 6A is a front view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0028] Figure 6B is a perspective view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0029] Figure 6C is another perspective view of the fifth generation mobile communication antenna module with improved isolation degree provided by the embodiment of the application.

[0030] Figure 7 is a partial enlarged view of the first main antenna and the first feed line provided by the embodiment of the application.

[0031] Figure 8 is a partial enlarged view of the second main antenna, the auxiliary antenna, the second feed line and the third feed line provided by the embodiment of the application.

[0032] Figure 9 is a gain curve diagram of the first main antenna provided by the embodiment of the application.

[0033] Figure 10is a gain curve diagram of the second main antenna provided by the embodiment of the present application.

[0034] Figure 11 is a gain curve diagram of the auxiliary antenna provided by the embodiment of the present application.

[0035] Figure 12 is an isolation curve diagram of the first main antenna and the auxiliary antenna provided by the embodiment of the present application.

[0036] Figure 13 is an isolation curve diagram of the first main antenna and the second main antenna provided by the embodiment of the present application.

[0037] Figure 14 is an isolation curve diagram of the auxiliary antenna and the second main antenna provided by the embodiment of the present application. DETAILED DESCRIPTION

[0038] The present application is further described below in conjunction with embodiments, but is not limited to the embodiments.

[0039] Please refer to Figures 1 to 5 The embodiment of the present application provides a fifth generation mobile communication antenna module with improved isolation, which comprises a substrate 100, a first main antenna 1, a second main antenna 2 and an auxiliary antenna 3. The substrate 100 has a first end 101 and a second end 102 opposite to each other. The substrate 100 is substantially in a long strip shape, and the distance between the first end 101 and the second end 102 is the length of the long side of the substrate 100. The long strip-shaped substrate 100 makes the first main antenna 1, the second main antenna 2 and the auxiliary antenna 3 arranged in a row. The antenna module is used in the shell space on the upper part of the screen of a notebook computer, as a built-in antenna module. The shell space on the upper part of the screen of the notebook computer is a common placement position for the built-in antenna module. The long strip structure in the figure has a part of the structure with an incircle (recess), or the cross section of the long strip is slightly similar to a trapezoid, which makes the antenna module and the internal structure of the notebook computer can be closely assembled, and is more suitable for practical application models, and does not affect the main characteristics of the antenna module.

[0040] Please refer to Figure 2 , the front view shows the antenna arrangement of the front surface 100a of the substrate 100. Please refer to Figure 3 , the back view shows the antenna arrangement of the back surface 100b of the substrate 100. Please refer to Figure 4 , the top view shows the antenna arrangement of the top surface 100c of the substrate 100. Please refer to Figure 5, the bottom surface 100d of the substrate 100. The first main antenna 1 is disposed on the substrate 100 and is close to the first end 101, and has a first radiating portion 11 and a second radiating portion 12, the first radiating portion 11 has a first feeding end 11a, the second radiating portion 12 has a first grounding end 12a, wherein the first feeding end 11a is not in contact with the first feed line F1 and constitutes a coupling feed, and the first grounding end 12a is connected to the ground G. Figure 6A 、 Figure 6B 、 Figure 6C The configuration of the feed lines and the copper foils is shown. The feed lines include three, which are the first feed line F1, the second feed line F2 and the third feed line F3. The copper foils are mainly divided into two blocks, which are the first copper foil C1 and the second copper foil C2, for the function of grounding the antenna modules. The first copper foil C1 is below the first main antenna 1 and is connected to the substrate 100 at the bottom surface 100d. The second copper foil C2 is below the second main antenna 2 and the auxiliary antenna 3 and is connected to the substrate 100 at the bottom surface 100d. In the figure, the copper foils located below each antenna represent the ground G, and the connection mode of the ground will not be described in detail. In addition, referring to the bottom view of Figure 5 and the perspective view of Figure 6B , since the first feed line F1 is disposed on the bottom surface 100d of the substrate 100, the first feeding end 11a extends to the bottom surface 100d of the substrate 100 to achieve optimal coupling with the first feed line F1 located on the bottom surface 100d.

[0041] Referring to the enlarged view shown in Figure 7 , the first radiating portion 11 further includes a first branch 111 and a second branch 112, and the first branch 111 and the second branch 112 are respectively connected to the first feeding end 11a. The first branch 111 and the second branch 112 extend in opposite directions. In the figure, most of the first radiating portion 11 is located on the front surface 100a, the first branch 111 extends towards the direction close to the auxiliary antenna 3, and the second branch 112 extends away from the auxiliary antenna 3. The second branch 112 includes a U-shaped bend, which reverses the path of the second branch 112, so that the end of the second branch 112 is close to the first branch 111 and is strongly coupled with the first branch 111 to excite more operating modes.

[0042] The second radiating portion 12 is coupled to the first radiating portion 11, and a majority of the second radiating portion 12 is located on the back surface 100b. The first radiating portion 11 is located between the first ground end 12a of the second radiating portion 12 and the auxiliary antenna 3. The second radiating portion 12 has a main section 121, a bending section 122, and an extended end section 123. The main section 121 is connected to the first ground end 12a on the back surface 100b. The bending section 122 is connected to the main section 121 on the upper surface 100c. The extended end section 123 is connected to the bending section 122 on the front surface 100a. The extended end section 123 is located between the first radiating portion 11 and the auxiliary antenna 3, and is used to improve the isolation between the first main antenna 1 and the auxiliary antenna 3. In the figure, the extended end section 123 is not close to the auxiliary antenna 3, but is closer to the first branch 111 of the first radiating portion 11, so as to help the second radiating portion 12 to couple the first radiating portion 11.

[0043] The second main antenna 2 is arranged on the substrate 100 and is close to the second end 102. The second main antenna 2 has a third radiating portion 21 and a fourth radiating portion 22. The third radiating portion 21 has a second feed end 21a. The fourth radiating portion 22 has a second ground end 22a. The second feed end 21a is not in contact with the second feed line F2 and constitutes a coupling feed. The second ground end 22a is connected to the ground G. Referring to Figure 5 the lower viewing angle and Figure 6B the perspective view, since the second feed line F2 is arranged on the bottom surface 100d of the substrate 100, the second feed end 21a extends to the bottom surface 100d of the substrate 100, so as to achieve optimal coupling with the second feed line F2 located on the bottom surface 100d.

[0044] Further, referring to Figure 8 the enlarged view, the fourth radiating portion 22 further includes a third ground end 22b. The third ground end 22b is connected to the ground G. The second ground end 22a and the third ground end 22b are parallel to each other. The fourth radiating portion 22 is coupled to the third radiating portion 21. Further, the second ground end 22a of the fourth radiating portion 22 is located between the third radiating portion 21 and the auxiliary antenna 3. Further, the third radiating portion 21 is closer to the ground G than the fourth radiating portion 22. The third radiating portion 21 and the fourth radiating portion 22 extend in opposite directions.

[0045] The auxiliary antenna 3 is arranged on the substrate 100 and is located between the first main antenna 1 and the second main antenna 2. The auxiliary antenna 3 has a third feed end 3a. The third feed end 3a is not in contact with the third feed line F3 and constitutes a coupling feed. The coupling feed constituted by the first feed end 11a and the coupling feed constituted by the third feed end 3a are used to improve the isolation between the first main antenna 1 and the auxiliary antenna 3.

[0046] The auxiliary antenna 3 further has a fifth radiation portion 31. Since the third feed line F3 is disposed on the bottom surface 100d of the substrate 100, the third feed-in end 3a extends to the bottom surface 100d of the substrate 100 to achieve optimal coupling with the third feed line F3 located on the bottom surface 100d. In addition, the fifth radiation portion 31 is mainly disposed on the back surface 100b, and in the figure, the fifth radiation portion 31 has two branches.

[0047] Furthermore, the fifth radiation portion 31 of the auxiliary antenna 3 and the fourth radiation portion 22 extend in the same direction (i.e., toward the second end 102), and the fifth radiation portion 31 and the third radiation portion 21 extend in opposite directions, so as to improve the isolation between the second main antenna 2 and the auxiliary antenna 3. In other words, for both the second antenna 2 and the auxiliary antenna 3, the feed points are as far away from each other as possible (the second feed-in end 21a and the third feed-in end 3a are far away from each other), and the fourth radiation portion 22, which is grounded, is located between the third radiation portion 21 (part of the second main antenna 2) and the fifth radiation portion 31 (part of the auxiliary antenna 3), and the fourth radiation portion 22 and the fifth radiation portion 31 extend in the same direction, so as to provide better isolation when the fifth radiation portion 31 and the third radiation portion 21 extend toward each other. The purpose of the fifth radiation portion 31 and the third radiation portion 21 extending toward each other is to reduce the volume of the antenna. In the design of the embodiment of the present application, both the volume of the antenna and the isolation are improved. (Conversely, in the traditional design with lower difficulty, if the fifth radiation portion 31 and the third radiation portion 21 extend away from each other, the volume of the antenna will increase, and the design of the isolation is easy to achieve and is not challenging.)

[0048] Furthermore, the second feed line F2 and the third feed line F3 are connected to the ground conductor 4, which is part of the second copper foil C2, the ground conductor 4 has a slot 41, and the ground conductor 4 is directly connected to the ground G. The auxiliary antenna 3 further has a grounding portion 32, the connection between the second grounding end 22a and the ground conductor 4 is located on the right side of the slot 41 (closer to the second end 102), and the connection between the grounding portion 32 of the auxiliary antenna 3 and the ground conductor 4 is located on the left side of the slot 41 (farther away from the second end 102), so as to improve the isolation between the second main antenna 2 and the auxiliary antenna 3.

[0049] Based on the optimal arrangement of the above antenna configuration, the applicable frequency band of the antenna includes the existing wireless local area network frequency band, the long-term evolution technology including the third generation mobile communication (3G) to the fourth generation mobile communication (4G) frequency band, and the 5G sub-6 frequency band. Reference Figure 9 、 Figure 10 、 Figure 11 , Figure 9The gain curve of the first main antenna 1 is shown, which is mainly used for LTE MAIN (LTE is the abbreviation of Long Term Evolution). Figure 10 The gain curve of the second main antenna 2 is shown, which is used for LTE MIMO MAIN (MIMO is the abbreviation of Multiple Input Multiple Output). Figure 11 The gain curve of the auxiliary antenna 3 is shown, which is used for LTE MIMO AUX.

[0050] When the size of the substrate 100 is used as the limit of the antenna size, the size of the substrate 100 is only required to be 102 mm in length, 8.5 mm in width, and 2.5 mm in thickness, so that the operation requirement of the wireless communication system can be achieved. Referring to Figure 12 the isolation curve diagram of the first main antenna 1 and the auxiliary antenna 3 of the first embodiment of the present application, Figure 13 the isolation curve diagram of the first main antenna 1 and the second main antenna 2 of the first embodiment of the present application, and Figure 14 the isolation curve diagram of the auxiliary antenna 3 and the second main antenna 2 of the first embodiment of the present application, the antenna module of the embodiment of the present application has better isolation than the conventional antenna module, and can meet the requirement of the notebook computer manufacturer. Especially, for the isolation design of the frequency in the range of 1710 MHz to 4900 MHz, better performance than the conventional antenna design can be provided.

[0051] In summary, the fifth generation mobile communication antenna module with improved isolation provided by the embodiment of the present application uses the means of coupling feeding and antenna structure configuration to improve the isolation between the first main antenna, the second main antenna, and the auxiliary antenna, and has high industrial application value.

Claims

1. A fifth generation mobile communication antenna module with improved isolation, characterized in that Comprising: a substrate having a first end and a second end opposite to each other; a first main antenna disposed on the substrate and close to the first end, having a first radiating portion and a second radiating portion, the first radiating portion having a first feed-in end, the second radiating portion having a first ground end, wherein the first feed-in end is not in contact with a first feed line and forms a coupled feed-in, the first ground end is connected to a ground, and the second radiating portion is coupled to the first radiating portion; a second main antenna disposed on the substrate and close to the second end, having a third radiating portion and a fourth radiating portion, the third radiating portion having a second feed-in end, the fourth radiating portion having a second ground end, wherein the second feed-in end is not in contact with a second feed line and forms a coupled feed-in, the second ground end is connected to the ground, and the fourth radiating portion is coupled to the third radiating portion; and an auxiliary antenna disposed on the substrate and between the first main antenna and the second main antenna, having a third feed-in end, the third feed-in end is not in contact with a third feed line and forms a coupled feed-in; the first radiating portion is between the first ground end of the second radiating portion and the auxiliary antenna, the second radiating portion has an extended end portion between the first radiating portion and the auxiliary antenna to improve the isolation between the first main antenna and the auxiliary antenna, the second feed line and the third feed line are connected to a ground conductor having a slot, the connection between the second ground end and the ground conductor is on the right side of the slot, and the connection between the ground of the auxiliary antenna and the ground conductor is on the left side of the slot to improve the isolation between the second main antenna and the auxiliary antenna. The first radiating portion further includes a first branch and a second branch, the first branch and the second branch are respectively connected to the first feed-in end.

2. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that The fourth radiating portion further includes a third ground end connected to the ground, the second ground end and the third ground end are parallel to each other.

3. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that The coupled feed-in formed by the first feed-in end and the coupled feed-in formed by the third feed-in end are used to improve the isolation between the first main antenna and the auxiliary antenna.

4. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that The second ground end of the fourth radiating portion is between the third radiating portion and the auxiliary antenna.

5. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that, The third radiating portion is closer to the ground than the fourth radiating portion, and the third radiating portion and the fourth radiating portion extend in opposite directions.

6. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that The auxiliary antenna further has a fifth radiating portion, the fifth radiating portion and the fourth radiating portion extend in the same direction, and the fifth radiating portion and the third radiating portion extend in opposite directions to improve the isolation between the second main antenna and the auxiliary antenna.

7. The fifth generation mobile communication antenna module with improved isolation according to claim 1, characterized in that ​

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