Antenna module and electronic equipment

Abstract

The utility model discloses an antenna module and electronic equipment. The antenna module comprises an antenna radiation unit, a wireless communication module, a low-pass filter circuit and a proximity sensing module, the antenna radiation unit comprises a first radiation body and a second radiation body coupled with the first radiation body, the first radiation body is used for transmitting or receiving a signal in a first frequency range, the second radiation body is used for transmitting or receiving a signal in a second frequency range, and the frequency value of the first frequency range is lower than that of the second frequency range; the wireless communication module is connected with the second radiator through a signal feeding point; the low-pass filter circuit is respectively connected with the first radiator, the proximity sensing module and the antenna ground; the proximity sensing module is used for detecting whether an object exists in a target range of the antenna module through the first radiator.

Description

Technical Field

[0001] The present application relates to an antenna module and an electronic device. Background Art

[0002] The antennas of electronic devices such as laptops are easily affected by system clutter. If the clutter is not suppressed, it will not only affect the wireless communication effect of the electronic device, but also the overall system performance of the electronic device. Usually, manufacturers will choose to set absorbing materials such as conductive foam in the antenna area to suppress and isolate clutter. However, as electronic devices such as laptops tend to be thinner and lighter, and the screens tend to have narrower borders, the internal space of electronic devices is becoming increasingly tight, and there is less and less space available for absorbing materials. The absorbing material itself is usually a porous material, which occupies a relatively large space, and its ability to absorb clutter is limited, and it is usually more expensive. Utility Model Content

[0003] The present application provides an antenna module and an electronic device. The technical solutions adopted in the embodiments of the present application are as follows.

[0004] In a first aspect, the present application provides an antenna module, including an antenna radiation unit, a wireless communication module, a low-pass filter circuit, and a proximity sensing module;

[0005] The antenna radiation unit includes a first radiator and a second radiator coupled to the first radiator, the first radiator is used to transmit or receive wireless signals in a first frequency range, the second radiator is used to transmit or receive wireless signals in a second frequency range, and the frequency value of the first frequency range is lower than the frequency value of the second frequency range; the wireless communication module is connected to the second radiator through a signal feeding point;

[0006] The low-pass filter circuit is connected to the first radiator, the proximity sensing module and the antenna ground respectively; the proximity sensing module is used to detect whether there is an object within the target range of the antenna module through the first radiator.

[0007] In some embodiments, the proximity sensing module is connected to the wireless communication module, and the proximity sensing module is further configured to send a signal to the wireless communication module to instruct the wireless communication module to reduce radiation power when determining that an object exists within the target range.

[0008] In some embodiments, the low-pass filtering circuit includes multiple stages of filtering circuits connected in series.

[0009] In some embodiments, the low-pass filter circuit includes a first-stage filter circuit, a second-stage filter circuit, and a third-stage filter circuit connected in series;

[0010] The first-stage filter circuit is respectively connected to the first radiator, the antenna ground and the second-stage filter circuit, the second-stage filter circuit is respectively connected to the antenna ground and the third-stage filter circuit, and the third-stage filter circuit is respectively connected to the antenna ground and the proximity sensing module.

[0011] In some embodiments, the first-stage filter circuit includes a first inductor and a first capacitor, the second-stage filter circuit includes a second inductor and a second capacitor, and the third-stage filter circuit includes a third inductor and a third capacitor;

[0012] The first inductor, the second inductor and the third inductor are connected in series between the first radiator and the proximity sensing module;

[0013] One end of the first capacitor is connected between the first radiator and the first inductor, and the other end of the first capacitor is connected to the antenna ground;

[0014] One end of the second capacitor is connected between the first inductor and the second inductor, and the other end of the second capacitor is connected to the antenna ground;

[0015] One end of the third capacitor is connected between the second inductor and the third inductor, and the other end of the third capacitor is connected to the antenna ground.

[0016] In some embodiments, the first radiator includes a first branch extending along a first direction and a second branch extending along a second direction, one end of the second branch is connected to one end of the first branch, and the other end of the second branch is connected to the low-pass filter circuit; wherein the first direction and the second direction are perpendicular to each other.

[0017] In some embodiments, the second radiator includes a third branch, a fourth branch, and a fifth branch;

[0018] The third branch is U-shaped, and the opening of the third branch faces the first branch;

[0019] One end of the fourth branch is connected to one end of the third branch, the fourth branch extends along a first direction and is located outside the opening of the third branch, a first gap is formed between the fourth branch and the first branch, and the fourth branch is coupled to the first branch;

[0020] One end of the fifth branch is connected to the other end of the third branch, the fifth branch extends along the first direction and is located inside the opening of the third branch, there is a second gap between the fifth branch and the first branch, and the fifth branch is coupled to the first branch.

[0021] In some embodiments, the antenna ground is disposed on a circuit board for carrying the antenna radiation unit, and the antenna ground is located on a side of the second radiator away from the first radiator, and the antenna ground extends along the first direction.

[0022] In some embodiments, the low-pass filter circuit and the proximity sensing module are both disposed on the circuit board.

[0023] A second aspect of the present application provides an electronic device, comprising the antenna module as described above.

[0024] The antenna module of the embodiment of the present application is provided with a low-pass filter circuit between the first radiator, the proximity sensing module and the antenna. The low-pass filter circuit can filter out clutter from the ambient space, clutter from the ground and clutter from the electronic device system end, and can suppress the influence of clutter on the antenna radiation unit, which is beneficial to improving the wireless communication quality of the electronic device. Moreover, to a certain extent, it can avoid the influence of the low-pass filter circuit on the antenna gain efficiency, so that the antenna gain efficiency can meet the use requirements. In addition, the low-pass filter circuit can also avoid the influence of clutter on the proximity sensing module, which is beneficial to improving the sensitivity of the proximity sensing module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the antenna module according to an embodiment of the present application.

[0026] Figure 2 Schematic diagram of reflection loss detection results of the low-pass filter circuit according to an embodiment of the present application.

[0027] Figure 3 Schematic diagram of wireless communication quality detection results of the antenna module according to an embodiment of the present application.

[0028] Figure 4 Schematic diagram of gain performance detection results of the antenna module according to an embodiment of the present application.

[0029] Figure 5 4 is a circuit schematic diagram of a low-pass filter circuit according to an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 10-antenna radiation unit; 11-first radiator; 12-second radiator; 13-antenna ground; 14-feeding point; 15-first branch; 16-second branch; 17-third branch; 18-fourth branch; 19-fifth branch;

[0032] 20- low-pass filter circuit; 21- first-stage filter circuit; 22- second-stage filter circuit; 23- third-stage filter circuit; L1- first inductor; C1- first capacitor; L2- second inductor; C2- second capacitor; L3- third inductor; C3- third capacitor;

[0033] 30- proximity sensing module;

[0034] 40-Circuit board. DETAILED DESCRIPTION

[0035] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0036] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0038] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0039] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0040] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0041] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0042] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0043] The embodiment of the present application provides an antenna module, Figure 1 This is a schematic diagram of the structure of the antenna module of the embodiment of the present application, see Figure 1 As shown, the antenna module of the embodiment of the present application includes an antenna radiation unit 10, a wireless communication module (not shown in the figure), a low-pass filter circuit 20 and a proximity sensing module 30.

[0044] The antenna radiation unit 10 includes a first radiator 11 and a second radiator 12 coupled to the first radiator 11. The first radiator 11 is used to transmit or receive wireless signals in a first frequency range. The second radiator 12 is used to transmit or receive wireless signals in a second frequency range, and the frequency value of the first frequency range is lower than the frequency value of the second frequency range. The wireless communication module is connected to the second radiator 12 through a signal feeding point 14. The wireless communication module can use the antenna radiation unit 10 to radiate wireless signals outward, and can also use the antenna radiation unit 10 to receive wireless signals from the outside.

[0045] It is understandable that when the wireless communication mode used by the antenna module is different, the specific value ranges of the first frequency range and the second frequency range may be different. For example, the antenna module can be used for WIFI communication, the first frequency range may be, for example, 2.4 GHz to 2.5 GHz, and the second frequency range may be, for example, 4.915 GHz to 5.925 GHz.

[0046] The low-pass filter circuit 20 is connected to the first radiator 11, the proximity sensing module 30 and the antenna ground 13 respectively. The proximity sensing module 30 is used to detect whether there is an object within the target range of the antenna module through the first radiator 11. Optionally, the proximity sensing module 30 can detect the induced electric field within the target range of the antenna module through the first radiator 11, so as to determine whether there is an object approaching within the target range of the antenna module. Specifically, when an object approaches the antenna module, the charge carried by the object will cause the induced electric field near the antenna module to change, and the change in the induced electric field will affect the induced capacitance value of the first radiator 11. The proximity sensing module 30 can detect the induced capacitance value of the first radiator 11 to determine whether there is an object approaching near the antenna module. Of course, the proximity sensing module 30 is not limited to detecting objects using the principle of electromagnetic induction, but can also detect whether there is an object approaching near the antenna module based on, for example, ultrasound or other principles.

[0047] The antenna module of the embodiment of the present application is provided with a low-pass filter circuit 20 between the first radiator 11, the proximity sensing module 30 and the antenna low. The low-pass filter circuit 20 can filter out clutter from the ambient space, clutter from the ground and clutter from the electronic device system end, and can suppress the influence of clutter on the antenna radiation unit 10, which is beneficial to improving the wireless communication quality of the electronic device. Moreover, to a certain extent, the low-pass filter circuit 20 can avoid the influence of the antenna gain efficiency, so that the antenna gain efficiency can meet the use requirements. In addition, the low-pass filter circuit 20 can also avoid the influence of clutter on the proximity sensing module 30, which is beneficial to improve the sensitivity of the proximity sensing module 30.

[0048] Figure 2 Schematic diagram of the reflection loss detection result of the low-pass filter circuit 20 of the embodiment of the present application. Figure 2 The effective communication frequency of the antenna module in the illustrated example is 617MHz to 5.925GHz. Figure 2 As can be seen from the red line, clutter below 617MHz can pass through the low-pass filter, but since it is not within the effective communication frequency, it will not affect the wireless communication quality of the antenna module. Figure 2 As can be seen from the blue line, the interference with frequencies above 617 MHz can be effectively isolated by the filter, thus preventing the interference with frequencies above 617 MHz from entering the antenna radiation unit 10 and the wireless communication module.

[0049] Figure 3 is a schematic diagram of wireless communication quality detection results of the antenna module of an embodiment of the present application, Figure 3 The middle blue part (Before) is used to illustrate the wireless communication quality detection result of the antenna module without the low-pass filter circuit 20. Figure 3 The orange part (After) is used to illustrate the wireless communication quality detection result of the antenna module equipped with the low-pass filter circuit 20. Figure 3 The four test results shown show that, compared with the antenna module in the prior art without the low-pass filter circuit 20, the antenna module of the embodiment of the present application can effectively communicate at a lower signal strength. It can be seen that the low-pass filter circuit 20 is provided to improve the communication quality of the antenna module.

[0050] Figure 4 is a schematic diagram of the gain performance detection result of the antenna module of the embodiment of the present application, Figure 4 The red dashed line in the middle shows the antenna gain target. Figure 4The blue curve, orange curve and pink curve respectively show three sets of gain performance test results of the antenna module. It can be seen that the three sets of gain performance test results can reach the antenna gain performance target value within the main frequency range. Therefore, a low-pass filter circuit 20 is set between the first radiator 11, the proximity sensing module 30 and the antenna low, and the wireless communication quality and gain performance of the antenna module can meet the use requirements. In particular, the wireless communication quality of the antenna module is improved compared with the antenna module in the prior art.

[0051] In some embodiments, the proximity sensing module 30 is connected to the wireless communication module, and the proximity sensing module 30 is specifically used to send a signal to the wireless communication module when it is determined that there is an object within the target range, instructing the wireless communication module to reduce the radiation power. In this way, when the user approaches the antenna radiation unit 10, the radiation power of the antenna radiation unit 10 can be reduced, thereby reducing the impact of electromagnetic radiation on the user.

[0052] In some embodiments, the low-pass filter circuit 20 includes a multi-stage filter circuit connected in series. The multi-stage filter circuit has a good filtering effect and can further improve the wireless communication effect of the electronic device. Optionally, the multi-stage filter circuit may include a two-stage filter circuit, a three-stage filter circuit, a four-stage filter circuit, or even a filter circuit with more stages.

[0053] Cooperate Figure 5 As shown, in some embodiments, the low-pass filter circuit 20 includes a first-stage filter circuit 21, a second-stage filter circuit 22, and a third-stage filter circuit 23 connected in series. The first-stage filter circuit 21 is respectively connected to the first radiator 11, the antenna ground 13, and the second-stage filter circuit 22. The second-stage filter circuit 22 is respectively connected to the antenna ground 13 and the third-stage filter circuit 23, and the third-stage filter circuit 23 is respectively connected to the antenna ground 13 and the proximity sensing module 30. The three-stage filter circuit can take into account both the filtering effect and the production cost.

[0054] In some embodiments, the first-stage filter circuit 21 includes a first inductor L1 and a first capacitor C1, the second-stage filter circuit 22 includes a second inductor L2 and a second capacitor C2, and the third-stage filter circuit 23 includes a third inductor L3 and a third capacitor C3. The first inductor L1, the second inductor L2 and the third inductor L3 are connected in series between the first radiator 11 and the proximity sensing module 30. One end of the first capacitor C1 is connected between the first radiator 11 and the first inductor L1, and the other end of the first capacitor C1 is connected to the antenna ground 13. One end of the second capacitor C2 is connected between the first inductor L1 and the second inductor L2, and the other end of the second capacitor C2 is connected to the antenna ground 13. One end of the third capacitor C3 is connected between the second inductor L2 and the third inductor L3, and the other end of the third capacitor C3 is connected to the antenna ground 13. In this way, a three-stage LC filter circuit can be formed, which is not only simple in structure, but also has a good blocking effect on clutter.

[0055] It should be noted that the low-pass filter circuit 20 is not limited to a three-stage filter circuit, nor is it limited to a three-stage LC filter circuit. For example, an RC low-pass filter circuit 20, an RL low-pass filter circuit 20, a Butterworth low-pass filter circuit 20, etc. may also be used.

[0056] In some embodiments, the first radiator 11 includes a first branch 15 extending along a first direction and a second branch 16 extending along a second direction, one end of the second branch 16 is connected to one end of the first branch 15, and the other end of the second branch 16 is connected to the low-pass filter circuit 20; wherein the first direction and the second direction are perpendicular to each other.

[0057] The second radiator 12 includes a third branch 17, a fourth branch 18 and a fifth branch 19. The third branch 17 is U-shaped, and the opening of the third branch 17 faces the first branch 15. One end of the fourth branch 18 is connected to one end of the third branch 17, the fourth branch 18 extends along the first direction and the fourth branch 18 is located outside the opening of the third branch 17, there is a first gap between the fourth branch 18 and the first branch 15, and the fourth branch 18 is coupled to the first branch 15. One end of the fifth branch 19 is connected to the other end of the third branch 17, the fifth branch 19 extends along the first direction and the fifth branch 19 is located inside the opening of the third branch 17, there is a second gap between the fifth branch 19 and the first branch 15, and the fifth branch 19 is coupled to the first branch 15.

[0058] The antenna ground 13 is disposed on a circuit board 40 for carrying the antenna radiation unit 10 , and the antenna ground 13 is located on a side of the second radiator 12 away from the first radiator 11 , and the antenna ground 13 extends along the first direction.

[0059] It should be noted that the arrangement of the first radiator 11, the second radiator 12 and the antenna ground 13 is only exemplary, and the first radiator 11, the second radiator 12 and the antenna ground 13 may also adopt other shapes or arrangements. In practical applications, as long as the antenna module includes the first radiator 11, the second radiator 12 and the antenna ground 13, and the low-pass filter circuit 20 is connected between the first radiator 11, the antenna ground 13 and the proximity sensing module 30.

[0060] In some embodiments, the low-pass filter circuit 20 and the proximity sensing module 30 are both disposed on the circuit board 40. Integrating the antenna radiation unit 10, the low-pass filter circuit 20 and the proximity sensing module on the same circuit board 40 is not only conducive to reducing the overall size of the antenna module, but also conducive to improving the detection sensitivity of the proximity sensing module.

[0061] The embodiment of the present application also provides an electronic device, including an antenna module as described in any of the above embodiments. Since the above antenna module is not easily affected by clutter and has good wireless communication quality and high gain efficiency, the electronic device using the above antenna module also has the above advantages. On this basis, the electronic device can save the absorbing material that occupies a large space, which is conducive to the realization of a lightweight design of the electronic device. Optionally, the electronic device includes but is not limited to a laptop computer, an all-in-one computer, a tablet computer, a personal digital assistant, a smart phone, and the like.

[0062] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. An antenna module, characterized in that: It includes an antenna radiation unit, a wireless communication module, a low-pass filter circuit and a proximity sensing module; The antenna radiation unit includes a first radiator and a second radiator coupled to the first radiator, the first radiator is used to transmit or receive wireless signals in a first frequency range, the second radiator is used to transmit or receive wireless signals in a second frequency range, and the frequency value of the first frequency range is lower than the frequency value of the second frequency range; the wireless communication module is connected to the second radiator through a signal feeding point; The low-pass filter circuit is connected to the first radiator, the proximity sensing module and the antenna ground respectively; the proximity sensing module is used to detect whether there is an object within the target range of the antenna module through the first radiator.

2. The antenna module according to claim 1, characterized in that: The proximity sensing module is connected to the wireless communication module. The proximity sensing module is further configured to send a signal to the wireless communication module to instruct the wireless communication module to reduce radiation power when determining that an object exists within the target range.

3. The antenna module according to claim 1, characterized in that: The low-pass filter circuit includes multiple stages of filter circuits connected in series.

4. The antenna module according to claim 3, characterized in that: The low-pass filter circuit comprises a first-stage filter circuit, a second-stage filter circuit and a third-stage filter circuit connected in series; The first-stage filter circuit is respectively connected to the first radiator, the antenna ground and the second-stage filter circuit, the second-stage filter circuit is respectively connected to the antenna ground and the third-stage filter circuit, and the third-stage filter circuit is respectively connected to the antenna ground and the proximity sensing module.

5. The antenna module according to claim 4, characterized in that: The first-stage filter circuit includes a first inductor and a first capacitor, the second-stage filter circuit includes a second inductor and a second capacitor, and the third-stage filter circuit includes a third inductor and a third capacitor; The first inductor, the second inductor and the third inductor are connected in series between the first radiator and the proximity sensing module; One end of the first capacitor is connected between the first radiator and the first inductor, and the other end of the first capacitor is connected to the antenna ground; One end of the second capacitor is connected between the first inductor and the second inductor, and the other end of the second capacitor is connected to the antenna ground; One end of the third capacitor is connected between the second inductor and the third inductor, and the other end of the third capacitor is connected to the antenna ground.

6. The antenna module according to claim 1, characterized in that: The first radiator includes a first branch extending along a first direction and a second branch extending along a second direction, one end of the second branch is connected to one end of the first branch, and the other end of the second branch is connected to the low-pass filter circuit; wherein the first direction and the second direction are perpendicular to each other.

7. The antenna module according to claim 6, characterized in that: The second radiator includes a third branch, a fourth branch and a fifth branch; The third branch is U-shaped, and the opening of the third branch faces the first branch; One end of the fourth branch is connected to one end of the third branch, the fourth branch extends along a first direction and is located outside the opening of the third branch, a first gap is formed between the fourth branch and the first branch, and the fourth branch is coupled to the first branch; One end of the fifth branch is connected to the other end of the third branch, the fifth branch extends along the first direction and is located inside the opening of the third branch, there is a second gap between the fifth branch and the first branch, and the fifth branch is coupled to the first branch.

8. The antenna module according to claim 7, characterized in that: The antenna ground is disposed on a circuit board for carrying the antenna radiation unit, and the antenna ground is located on a side of the second radiator away from the first radiator, and the antenna ground extends along the first direction.

9. The antenna module according to claim 8, characterized in that: The low-pass filter circuit and the proximity sensing module are both arranged on the circuit board.

10. An electronic device, characterized in that: Comprising the antenna module as described in any one of claims 1 to 9.

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