Slot coupling three-in-one mobile phone antenna for MIMO (Multiple Input Multiple Output) and mobile equipment

Abstract

The utility model provides a slot coupling three-in-one mobile phone antenna for MIMO and a mobile device. The mobile phone antenna comprises a substrate, and a feeding point, a first radiation arm, a second radiation arm and a grounding point which are arranged on the substrate. The feeding point and the grounding point are respectively connected with the first radiation arm; the feeding point, the grounding point and one part of the first radiation arm form a first slot antenna; the first radiation arm is bent and forms a second slot antenna; the first radiation arm is coupled with the second slot antenna; one end of the second radiation arm is connected with the feeding point, and the other end extends along the direction far away from the feeding point; the second radiation arm is bent and forms a third slot antenna; the second radiation arm is coupled with the third slot antenna. According to the utility model, the first slot antenna, the second slot antenna and the third slot antenna are formed by using the structures of the first radiation arm and the second radiation arm, three kinds of resonance are excited, and the first radiation arm and the second radiation arm are used for coupling, so that the antenna efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile device communication, and in particular relates to a three-in-one mobile phone antenna for MIMO and a mobile device. Background Art

[0002] In the era of smart phones, new instant messaging software and Internet phone are popular. The quality of wifi performance can be directly reflected in user use; poor performance and stability of GPS antenna can be directly reflected when using map navigation. The three-in-one antenna of smart phones is GPS, Wifi and BlueTooth antenna. The three-in-one antenna in smart phones directly affects the user experience.

[0003] The three-in-one antenna design of existing smart devices basically places the three-in-one antenna on the antenna bracket or inside the middle frame / back shell. The commonly used routing form is IFA / Loop. The IFA antenna form has a narrow bandwidth and relies on two branches to achieve the resonance of GPS and wifi2.4G. However, mainstream mobile phones in the market basically need to be equipped with 5G wifi. The original IFA routing solution cannot achieve 5G wifi coverage. Therefore, 2.4G wifi and 5G wifi cannot be taken into account at the same time, and the wifi performance will be poor. Therefore, a separate 5Gwifi antenna needs to be set up, which increases the cost. In addition, the three-in-one antenna is basically placed on one side of the camera. At present, the number of cameras is gradually increasing. The sensors and photosensors on the camera squeeze the routing space of the three-in-one antenna, making the antenna design more difficult. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and provide a MIMO slot-coupled three-in-one mobile phone antenna, which excites three resonances through the slot formed by the radiating arm structure, and utilizes the first radiating arm and the second radiating arm for coupling to improve the antenna efficiency.

[0005] The utility model is realized by the following technical solutions:

[0006] A slot-coupled three-in-one mobile phone antenna for MIMO, comprising a substrate, and a feeding point, a first radiation arm, a second radiation arm and a grounding point arranged on the substrate;

[0007] The feeding point and the grounding point are respectively connected to the first radiating arm; the feeding point and the grounding point form a first slot antenna with a part of the first radiating arm; the first radiating arm is bent and forms a second slot antenna; the first radiating arm is coupled with the second slot antenna; one end of the second radiating arm is connected to the feeding point, and the other end extends in a direction away from the feeding point; the second radiating arm is bent and forms a third slot antenna; the second radiating arm is coupled with the third slot antenna.

[0008] The utility model provides a slot-coupled three-in-one mobile phone antenna for MIMO, which utilizes the structures of the first radiation arm and the second radiation arm to form the first slot antenna, the second slot antenna and the third slot antenna, excites three resonances, and utilizes the first radiation arm and the second radiation arm for coupling to improve antenna efficiency.

[0009] Furthermore, the resonance generated by the first slot antenna supports the 5G WiFi band, and the length of the first slot antenna is 1 / 4 of the wavelength length of the 5G WiFi band; the resonance generated by the second slot antenna supports the 2.4GHz band, and the length of the second slot antenna is 1 / 4 of the wavelength length of the 2.4GHz band; the resonance generated by the third slot antenna supports the GPS band, and the length of the second slot antenna is 1 / 4 of the wavelength length of the GPS band. The first slot antenna, the second slot antenna, and the third slot antenna excite three kinds of resonances, which are respectively used to support the 5G WiFi band, the 2.4GHz band, and the GPS band; among them, since the frequency bands used by Bluetooth and 2.4G WiFi are both the 2.4GHz band, the second slot antenna can be used to support Bluetooth and 2.4G WiFi, and four communication application scenarios can be supported in the slot-coupled three-in-one mobile phone antenna for MIMO.

[0010] Furthermore, the first radiating arm includes a common radiating section and a first radiating section; the feeding point and the grounding point are respectively connected to the common radiating section and are located on the same side of the common radiating section, and the gap between the feeding point, the grounding point and the common radiating section forms a first slot antenna; the first radiating section is connected to one end of the common radiating section close to the feeding point.

[0011] Furthermore, the slot-coupled three-in-one mobile phone antenna for MIMO also includes a feeding spring pin and a grounding spring pin for electrically connecting to the mainboard, the feeding point is electrically connected to the mainboard through the feeding spring pin, and the grounding point is connected to the grounding point through the grounding spring pin.

[0012] Furthermore, the width of the first slot antenna is the same at all locations; the first slot antenna is in a straight line or a bent shape. The width of the first slot antenna is the same at all locations to ensure that the electromagnetic characteristics at all locations are consistent and the antenna efficiency is stable.

[0013] Furthermore, the first radiating section is connected to and bent at one end of the common radiating section near the feeding point, the first radiating section extends toward the grounding point, and the gap between the first radiating section and the common radiating section forms a second slot antenna. The second slot antenna is formed by using the structure of the first radiating section and the common radiating section, the length of the first radiating section is the length of the second slot antenna, which is convenient for adjusting the length of the second slot antenna, and the first radiating section has the same frequency band as the second slot antenna to generate coupling.

[0014] Furthermore, the width of the second slot antenna is the same at all locations; the second slot antenna is in a straight line or a bent shape. The width of the second slot antenna is the same at all locations to ensure that the electromagnetic characteristics at all locations are consistent and the antenna efficiency is stable.

[0015] Furthermore, the second radiating arm includes a second connecting section and a second bending section; one end of the second connecting section is connected to one end of the common radiating section close to the feeding point and extends in a direction away from the first radiating section; the other end of the second connecting section is connected to the second bending section, and the second bending section extends in a direction close to the first radiating section to form a gap between the second connecting section, and the gap forms the third slot antenna.

[0016] Furthermore, the extension direction of the second bending section is parallel to the extension direction of the second connecting section and the first radiating section, the second bending section extends from the second connecting section to the first radiating section, and the spacing between the second connecting section, the second bending section and the first radiating section forms the third slot antenna. The third slot antenna is formed by using the structure of the first radiating section, the second connecting section and the second bending section, and the length of the second bending section is the length of the third slot antenna, which is convenient for adjusting the length of the third slot antenna and is the same as the frequency band of the third slot antenna to generate coupling.

[0017] The utility model also provides a mobile device, comprising a shell, a mainboard and a MIMO antenna module; the mainboard is located in the shell; the MIMO antenna module comprises the above-mentioned MIMO slot-coupled three-in-one mobile phone antenna.

[0018] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the slot-coupled three-in-one mobile phone antenna for MIMO in Example 1.

[0020] Figure 2 It is the S11 parameter diagram of the slot-coupled three-in-one mobile phone antenna for MIMO in Example 1.

[0021] Figure 3It is a diagram of the antenna efficiency of the slot-coupled three-in-one mobile phone antenna for MIMO of Example 1. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the embodiments of the utility model in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the utility model, rather than to limit the embodiments of the utility model. It should also be noted that, for ease of description, only parts related to the embodiments of the utility model are shown in the accompanying drawings, rather than all structures.

[0023] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0024] Similarly, the terms "fixed" and "connected" used in the specification and claims should not be construed as limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to a device or system in which device A is directly connected to device B, but means that there is a path between device A and device B, which may be a path including other devices or tools.

[0025] Example 1

[0026] This embodiment provides a slot-coupled three-in-one mobile phone antenna for MIMO. Figure 1 This is a schematic diagram of the structure of a slot-coupled three-in-one mobile phone antenna for MIMO. Figure 1 The slot-coupled three-in-one mobile phone antenna for MIMO includes a substrate 1 and a feeding point 2, a first radiation arm 3, a second radiation arm 4 and a grounding point 8 arranged on the substrate 1;

[0027] The feeding point 2 and the grounding point 8 are respectively connected to the first radiating arm 3; the feeding point 2 and the grounding point 8 form a first slot antenna 5 with a part of the first radiating arm 3; the first radiating arm 3 is bent and forms a second slot antenna 6; the first radiating arm 3 is coupled with the second slot antenna 6; one end of the second radiating arm 4 is connected to the feeding point 2, and the other end extends in a direction away from the feeding point 2; the second radiating arm 4 is bent and forms a third slot antenna 7; the second radiating arm 4 is coupled with the third slot antenna 7.

[0028] In this embodiment, the resonance generated by the first slot antenna 5 supports the 5G WiFi band, and the length of the first slot antenna 5 is 1 / 4 of the wavelength length of the 5G WiFi band; the resonance generated by the second slot antenna 6 supports the 2.4GHz band, and the length of the second slot antenna 6 is 1 / 4 of the wavelength length of the 2.4GHz band; the resonance generated by the third slot antenna 7 supports the GPS band, and the length of the second slot antenna 6 is 1 / 4 of the wavelength length of the GPS band. The first slot antenna 5, the second slot antenna 6, and the third slot antenna 7 excite three kinds of resonance, which are respectively used to support the 5G WiFi band, the 2.4GHz band, and the GPS band; among them, since the frequency bands used by Bluetooth and 2.4G WiFi are both the 2.4GHz band, the second slot antenna 6 can be used to support Bluetooth and 2.4G WiFi, and four communication application scenarios can be supported in the slot-coupled three-in-one mobile phone antenna for MIMO.

[0029] In this embodiment, the first radiating arm 3 includes a common radiating section 31 and a first radiating section 32; the feeding point and the grounding point 8 are respectively connected to the common radiating section 31 and are located on the same side of the common radiating section 31, and the gap between the feeding point, the grounding point 8 and the common radiating section 31 forms a first slot antenna 5; the first radiating section 32 is connected to one end of the common radiating section 31 close to the feeding point.

[0030] In this embodiment, the width of the first slot antenna 5 is the same at all locations; the first slot antenna 5 is in a straight line or a bent shape. The width of the first slot antenna 5 is the same at all locations to ensure that the electromagnetic characteristics at all locations are consistent and the antenna efficiency is stable.

[0031] In this embodiment, the slot-coupled three-in-one mobile phone antenna for MIMO further includes a feeding spring pin and a grounding spring pin for electrically connecting to the mainboard, the feeding point 2 is electrically connected to the mainboard through the feeding spring pin, and the grounding point 8 is connected to the grounding point 8 through the grounding spring pin. The distance between the grounding point 8 and the feeding point 2 is the width of the first slot antenna 5.

[0032] In this embodiment, the first radiation section 32 is connected to and bent at one end of the common radiation section 31 near the feeding point, the first radiation section 32 extends toward the grounding point 8, and the gap between the first radiation section 32 and the common radiation section 31 forms the second slot antenna 6. The second slot antenna 6 is formed by using the structure of the first radiation section 32 and the common radiation section 31, and the length of the first radiation section 32 is the length of the second slot antenna 6, which is convenient for adjusting the length of the second slot antenna 6, and the frequency band is the same as the second slot antenna 6 to generate coupling.

[0033] In this embodiment, the width of the second slot antenna 6 is the same at all locations, and the second slot antenna 6 is in a straight line or a bent shape. The width of the second slot antenna 6 is the same at all locations to ensure that the electromagnetic characteristics at all locations are consistent, so that the antenna efficiency is stable.

[0034] In this embodiment, the second radiating arm 4 includes a second connecting section 41 and a second bending section 42; one end of the second connecting section 41 is connected to an end of the common radiating section 31 close to the feeding point 2, and extends in a direction away from the first radiating section 32; the other end of the second connecting section 41 is connected to the second bending section 42, and the second bending section 42 extends in a direction close to the first radiating section 32, forming a gap between the second connecting section 41, and the gap forms a third slot antenna 7.

[0035] In one embodiment, the extension direction of the second bending section 42 is parallel to the extension direction of the second connecting section 41 .

[0036] In another embodiment, one end of the second bending section 42 is connected to and bent at one end of the common radiation section 31 close to the feeding point 2, and the gap formed by the bending of the second bending section 42 itself forms a third slot antenna 7. The frequency band of the third slot antenna 7 can be adjusted by adjusting the bending shape of the second bending section 42.

[0037] In this embodiment, the extension direction of the second bending section 42 is parallel to the extension direction of the second connecting section 41 and the first radiating section 32. The second bending section 42 extends from the second connecting section 41 to the first radiating section 32. The spacing between the second connecting section 41, the second bending section 42 and the first radiating section 32 forms the third slot antenna 7. The third slot antenna 7 is formed by utilizing the structure of the first radiating section 32, the second connecting section 41 and the second bending section 42. The length of the second bending section 42 is the length of the third slot antenna 7, which is convenient for adjusting the length of the third slot antenna 7 and is the same as the frequency band of the third slot antenna 7 to generate coupling.

[0038] Figure 2 This is the S11 parameter diagram of the slot-coupled three-in-one mobile phone antenna for MIMO. Figure 2 The first slot antenna 5 generates 5.15-5.85 GHz 5G WiFi frequency band resonance, and the return loss is (-10) to (-8) dB; the second slot antenna 6 generates 2.4 GHz frequency band resonance, and the first radiation arm 3 is coupled with the second slot antenna 6, and the return loss is (-10) to (-8) dB; the third slot antenna 7 generates 1.5 GHz GPS frequency band resonance, and the second radiation arm 4 is coupled with the third slot antenna 7, and the return loss is (-12) dB.

[0039] Figure 3 This is the antenna efficiency diagram of the slot-coupled three-in-one mobile phone antenna for MIMO. Figure 3The first slot antenna 5 generates 5.15-5.85 GHz 5G WiFi frequency band resonance, and the antenna efficiency is (-4) to (-7) dB; the second slot antenna 6 generates 2.4 GHz frequency band resonance, the first radiation arm 3 is coupled with the second slot antenna 6, and the antenna efficiency is (-6) dB; the third slot antenna 7 generates 1.5 GHz GPS frequency band resonance, the second radiation arm 4 is coupled with the third slot antenna 7, and the antenna efficiency is (-6) dB.

[0040] In one implementation, the total length of the MIMO slot-coupled three-in-one mobile phone antenna is 32.5 mm, the total width is 12.5 mm, the antenna resonance can reach 3, the antenna occupies a small space, the control resonance area is clear, and the adjustment and optimization are convenient and fast.

[0041] Example 2

[0042] This embodiment provides a mobile device, including a housing, a mainboard and a MIMO antenna module; the mainboard is located inside the housing; the MIMO antenna module includes the slot-coupled three-in-one mobile phone antenna for MIMO of embodiment 1.

[0043] In the mobile device provided in this embodiment, the MIMO slot-coupled three-in-one mobile phone antenna is applied to the MIMO antenna module, multiple frequency bands are excited in a limited antenna routing space, and the first radiation arm 3 and the second radiation arm 4 in the MIMO slot-coupled three-in-one mobile phone antenna are coupled to improve the antenna efficiency.

[0044] In this embodiment, the shell includes a front shell and a rear shell connected to each other; a receiving frame for accommodating a camera is provided on the rear shell, and a substrate 1 of a slot-coupled three-in-one mobile phone antenna for MIMO is installed in the receiving frame. The resonance generated by the first slot antenna 5 supports the 5G WiFi band, the resonance generated by the second slot antenna 6 supports the 2.4GHz band, and the resonance generated by the third slot antenna 7 supports the GPS band. Since the frequency bands used by Bluetooth and 2.4G WiFi are both the 2.4GHz band, the second slot antenna 6 can be used to support Bluetooth and 2.4G WiFi, and four communication application scenarios are supported in the slot-coupled three-in-one mobile phone antenna for MIMO, which reduces the number of antennas and meets the coverage of 5G WiFi, GPS, 2.4G WiFi and Bluetooth, reduces costs, and occupies less space.

[0045] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A slot-coupled three-in-one mobile phone antenna for MIMO, characterized in that: It comprises a substrate, and a feeding point, a first radiation arm, a second radiation arm and a grounding point arranged on the substrate; The feeding point and the grounding point are respectively connected to the first radiating arm; the feeding point and the grounding point form a first slot antenna with a part of the first radiating arm; The first radiating arm is bent and forms a second slot antenna; the first radiating arm is coupled with the second slot antenna; One end of the second radiating arm is connected to the feeding point, and the other end extends in a direction away from the feeding point; The second radiating arm is bent and forms a third slot antenna; the second radiating arm is coupled with the third slot antenna.

2. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 1, characterized in that: The resonance generated by the first slot antenna supports the 5G WiFi frequency band, and the length of the first slot antenna is 1 / 4 of the wavelength length of the 5G WiFi frequency band; The resonance generated by the second slot antenna supports the 2.4 GHz frequency band, and the length of the second slot antenna is 1 / 4 of the wavelength length of the 2.4 GHz frequency band; The resonance generated by the third slot antenna supports the GPS frequency band, and the length of the second slot antenna is 1 / 4 of the wavelength length of the GPS frequency band.

3. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 1, characterized in that: The first radiating arm comprises a common radiating section and a first radiating section; The feeding point and the grounding point are respectively connected to the common radiating section and are located on the same side of the common radiating section, and the gap between the feeding point, the grounding point and the common radiating section forms a first slot antenna; The first radiating section is connected to an end of the common radiating section close to the feeding point.

4. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 3, characterized in that: It also includes a feeding spring pin and a grounding spring pin for electrically connecting to the mainboard, the feeding point is electrically connected to the mainboard through the feeding spring pin, and the grounding point is connected to the grounding point through the grounding spring pin.

5. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 4, characterized in that: The width of the first slot antenna is the same at all locations; the first slot antenna is in a straight line or a bent shape.

6. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 4, characterized in that: The first radiating section is connected to and bent at one end of the common radiating section close to the feeding point, the first radiating section extends toward the grounding point, and the gap between the first radiating section and the common radiating section forms a second slot antenna.

7. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 6, characterized in that: The width of the second slot antenna is the same at all locations; the second slot antenna is in a straight line or a bent shape.

8. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 3, characterized in that: The second radiating arm comprises a second connecting section and a second bending section; One end of the second connecting section is connected to one end of the common radiating section close to the feeding point, and extends in a direction away from the first radiating section; The other end of the second connecting section is connected to the second bending section. The second bending section extends in a direction close to the first radiating section and forms a gap with the second connecting section. The gap forms the third slot antenna.

9. The slot-coupled three-in-one mobile phone antenna for MIMO according to claim 8, characterized in that: The extension direction of the second bending section is parallel to the extension directions of the second connecting section and the first radiating section. The second bending section extends from the second connecting section to the first radiating section. The distance between the second connecting section, the second bending section and the first radiating section forms the third slot antenna.

10. A mobile device, characterized in that: It comprises a shell, a main board and a MIMO antenna module; the main board is located in the shell; the MIMO antenna comprises the slot-coupled three-in-one mobile phone antenna module for MIMO as claimed in any one of claims 1-8.

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