Three-in-one coupled antenna and mobile device

Abstract

The utility model provides a three-in-one coupled antenna and a mobile device. The three-in-one coupled antenna comprises a radiation antenna unit and a coupled antenna unit. The radiation antenna unit comprises a feeding point, a common radiation arm, a first grounding point, a first radiation arm and a second radiation arm; the feeding point and the first grounding point are connected through the common radiation arm; the first radiation arm is connected with one end, away from the first grounding point, of the feeding point; the second radiation arm is connected with one end, away from the first grounding point, of the feeding point; the coupling antenna unit is located on the side, away from the first grounding point, of the feeding point and is coupled with the radiating antenna unit to form a coupling loop. Two kinds of resonance are excited through the first radiation arm and the second radiation arm, the third kind of resonance is excited through coupling, the first antenna loop and the second antenna loop are separated from the third antenna loop of the coupling antenna unit, three kinds of frequencies are achieved, interference is reduced, and 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 antenna and a mobile device. Background Art

[0002] With the rapid development of terminal electronic products, smart phone devices are updated and replaced quickly. Now mainstream mobile phone products are basically full-screen designs, and the number of cameras has increased. Three or even four cameras have become standard. With more and more mobile phone cameras, the antenna clearance of mobile phones is getting smaller and smaller. However, with more and more mobile phone antennas, the performance requirements are getting higher and higher, which makes the antenna design environment in mobile phones more complex. How to achieve high performance has become a new challenge.

[0003] The existing antenna design basically sets the antenna bracket in the middle frame, and sets a three-in-one antenna on the antenna bracket. The three-in-one antenna is the GPS&WiFi&BT antenna. The common routing form of the three-in-one antenna is IFA, which relies on two branches to achieve the resonance of GPS and WiFi2.4G, and can also achieve 5GHz WiFi, but the IFA antenna bandwidth is narrow, and 2.4GHz WiFi and 5GHz WiFi cannot be taken into account at the same time, and the WiFi performance is poor.

[0004] The three-in-one antenna in smart devices directly determines the customer experience of using wireless routing and GPS positioning. Therefore, the efficiency of the three-in-one antenna directly affects the actual use effect of customers. Due to the poor antenna design environment, the smaller antenna clearance and the increase in antenna frequency bands, antenna design has brought challenges, and a new three-in-one antenna solution is urgently needed to solve performance problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and provide a three-in-one coupled antenna, which excites two resonances through a first radiating arm and a second radiating arm, and utilizes coupling to excite a third resonance, separates the first antenna loop and the second antenna loop from the third antenna loop of the coupled antenna unit, realizes three frequencies while reducing interference and improving antenna efficiency.

[0006] The utility model is realized by the following technical solutions:

[0007] A three-in-one coupling antenna, comprising a radiating antenna unit and a coupling antenna unit; the radiating antenna unit comprises a feeding point, a common radiating arm, a first grounding point, a first radiating arm and a second radiating arm; the feeding point and the first grounding point are connected through the common radiating arm; the first radiating arm is connected to an end of the feeding point away from the first grounding point; the feeding point, the common radiating arm, the first radiating arm and the first grounding point form a first antenna loop; the second radiating arm is connected to an end of the feeding point away from the first grounding point; the feeding point, the common radiating arm, the second radiating arm and the first grounding point form a second antenna loop; the coupling antenna unit is located on a side of the feeding point away from the first grounding point, and is coupled with the radiating antenna unit to form a coupling loop.

[0008] The utility model provides a three-in-one coupled antenna, which utilizes a first radiating arm and a second radiating arm to form a first antenna loop and a second antenna loop, and excites two resonant frequencies. A coupling antenna unit is arranged on one side of a feeding point and is coupled with the radiating antenna unit, and a third resonance is excited by coupling. The first antenna loop and the second antenna loop are separated from the third antenna loop of the coupling antenna unit to achieve three frequencies while reducing interference and improving antenna efficiency.

[0009] Furthermore, the working frequency band of the first antenna loop is the 2.4 GHz WiFi frequency band; the working frequency band of the second antenna loop is the GPS frequency band; and the working frequency band of the coupling antenna unit is the 5 GHz WiFi frequency band.

[0010] Further, the first radiating arm includes a first connecting section and a first radiating section, the first connecting section is connected to the feeding point, and the first radiating section is connected to an end of the first connecting section away from the feeding point; the second radiating arm includes a second connecting section and a second radiating section, the second connecting section is connected to the intersection of the first connecting section and the first radiating arm, and the second radiating section is connected to an end of the second connecting section away from the feeding point; the feeding point, the first connecting section and the second connecting section form a first coupling body coupled with the coupling antenna unit, the coupling antenna unit is located on one side of the first coupling body, and the first radiating section and the second radiating section both extend along a side of the first coupling body away from the coupling antenna unit. The feeding point, the first connecting section and the second connecting section form a first coupling body coupled with the coupling antenna unit to couple and generate a third resonance, and the first radiating section and the second radiating section both extend along a side of the first coupling body away from the coupling antenna unit to reduce interference with the coupling loop.

[0011] Furthermore, the coupling antenna unit includes a second grounding point and a second coupling body, and the second coupling body is connected to the second grounding point; the second grounding point is arranged close to the feeding point, and the second coupling body is coupled to the first coupling body.

[0012] Furthermore, the distance between the first coupling body and the second coupling body is 0.5-2 mm. The distance between the first coupling body and the second coupling body is controlled to generate coupling.

[0013] Furthermore, the shapes of the first coupling body and the second coupling body match each other to form a uniform and stable electromagnetic field.

[0014] Furthermore, the first coupling body and the second coupling body are both in a straight line shape. The first coupling body and the second coupling body with regular shapes are conducive to generating a uniform electromagnetic field to achieve stable antenna efficiency.

[0015] Furthermore, the first radiation section is bent; the second radiation section is bent.

[0016] The utility model also provides a mobile device, comprising a shell, a middle frame, a mainboard and the above-mentioned three-in-one coupling antenna; the middle frame is arranged in the shell; the mainboard is arranged in the middle frame; the shell comprises a front shell and a rear shell connected to each other; the three-in-one coupling antenna is arranged in the shell and located on the rear shell, and the feeding point, the first grounding point and the second grounding point of the three-in-one coupling antenna are all electrically connected to the mainboard.

[0017] Furthermore, the three-in-one coupling antenna also includes a feeding spring pin, a first grounding spring pin and a second grounding spring pin; the feeding point is electrically connected to the mainboard through the feeding spring pin; the first grounding point is electrically connected to the mainboard through the first grounding spring pin; and the second grounding point is electrically connected to the mainboard through the second grounding spring pin.

[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 schematic diagram of the structure of the three-in-one coupled antenna of Example 1.

[0020] Figure 2 It is the S11 diagram of the three-in-one coupled antenna of Example 1.

[0021] Figure 3 It is the antenna efficiency diagram of the three-in-one coupled antenna of Example 1.

[0022] Figure 4 It is a schematic diagram of the connection between the three-in-one coupling antenna and the mainboard of Example 2. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Example 1

[0027] This embodiment provides a three-in-one coupled antenna. Figure 1 This is a schematic diagram of the structure of the three-in-one coupled antenna. Please refer to Figure 1 , the three-in-one coupling antenna includes a radiating antenna unit 1 and a coupling antenna unit 2; the radiating antenna unit 1 includes a feeding point 11, a common radiating arm 12, a first grounding point 13, a first radiating arm 14 and a second radiating arm 15;

[0028] The feeding point 11 and the first grounding point 13 are connected via a common radiating arm 12; the first radiating arm 14 is connected to an end of the feeding point 11 away from the first grounding point 13;

[0029] The feeding point 11, the common radiating arm 12, the first radiating arm 14 and the first grounding point 13 form a first antenna loop;

[0030] The second radiating arm 15 is connected to an end of the feeding point 11 away from the first grounding point 13; the feeding point 11, the common radiating arm 12, the second radiating arm 15 and the first grounding point 13 form a second antenna loop;

[0031] The coupling antenna unit 2 is located at a side of the feeding point 11 away from the first grounding point 13 and is coupled with the radiating antenna unit 1 to form a coupling loop.

[0032] The present embodiment provides a three-in-one coupled antenna, in which a first radiating arm 14 and a second radiating arm 15 are used to form a first antenna loop and a second antenna loop, and two resonant frequencies are excited. The coupling antenna unit 2 is arranged on one side of the feeding point 11 and is coupled with the radiating antenna unit 1. The third resonance is excited by coupling. The first antenna loop and the second antenna loop are separated from the third antenna loop of the coupling antenna unit 2 to achieve three frequencies while reducing interference, occupying a small volume and improving antenna efficiency.

[0033] In this embodiment, the working frequency band of the first antenna loop is the 2.4 GHz WiFi frequency band; the working frequency band of the second antenna loop is the GPS frequency band; and the working frequency band of the coupling antenna unit 2 is the 5 GHz WiFi frequency band.

[0034] In this embodiment, the first radiating arm 14 includes a first connecting section 141 and a first radiating section 142, the first connecting section 141 is connected to the feeding point 11, and the first radiating section 142 is connected to an end of the first connecting section 141 away from the feeding point 11; the second radiating arm 15 includes a second connecting section 151 and a second radiating section 152, the second connecting section 151 is connected to the intersection of the first connecting section 141 and the first radiating arm 14, and the second radiating section 152 is connected to an end of the second connecting section 151 away from the feeding point 11; the feeding point 11, the first connecting section 141 and the second connecting section 151 form a first coupling body 16 coupled to the coupling antenna unit 2, the coupling antenna unit 2 is located on one side of the first coupling body 16, and the first radiating section 142 and the second radiating section 152 both extend along a side of the first coupling body 16 away from the coupling antenna unit 2. The feeding point 11, the first connecting section 141 and the second connecting section 151 form a first coupling body 16 coupled to the coupling antenna unit 2 to couple and generate a third resonance. The first radiating section 142 and the second radiating section 152 both extend along a side of the first coupling body 16 away from the coupling antenna unit 2 to reduce interference with the coupling loop.

[0035] In this embodiment, the coupling antenna unit 2 includes a second grounding point 21 and a second coupling body 22 , and the second coupling body 22 is connected to the second grounding point 21 ; the second grounding point 21 is arranged close to the feeding point 11 , and the second coupling body 22 is coupled to the first coupling body 16 .

[0036] In this embodiment, the distance between the first coupling body 16 and the second coupling body 22 is 0.5-2 mm. The distance between the first coupling body 16 and the second coupling body 22 is controlled to generate coupling.

[0037] In this embodiment, the shapes of the first coupling body 16 and the second coupling body 22 match to form a uniform and stable electromagnetic field. Specifically, the first coupling body 16 and the second coupling body 22 are both straight. The regular shapes of the first coupling body 16 and the second coupling body 22 are conducive to generating a uniform electromagnetic field to achieve stable antenna efficiency.

[0038] In this embodiment, the first radiation section 142 is bent; the second radiation section 152 is bent.

[0039] In one embodiment, the common radiation arm 12 is in a straight line shape, and the feeding point 11 and the first grounding point 13 are respectively connected to the two ends of the common radiation arm 12; one end of the first connecting section 141 is vertically connected to the feeding point 11, and the first radiation section 142 is connected to the other end of the first connecting section 141 and extends along a side away from the coupling antenna unit 2; one end of the second connecting section 151 is connected to the intersection of the first connecting section 141 and the first radiation arm 14, and the extension direction of the second connecting section 151 is the same as the extension direction of the first connecting section 141, so that the first coupling body 16 formed by the feeding point 11, the first connecting section 141 and the second connecting section 151 is in a straight line shape; the second radiation section 152 is connected to the other end of the second connecting section 151 and extends along a side away from the coupling antenna unit 2.

[0040] Figure 2 This is the S11 diagram of the three-in-one coupled antenna, please refer to Figure 2 The feeding point 11, the common radiating arm 12, the first radiating arm 14 and the first grounding point 13 form a first antenna loop, generating a 2.4GHz WiFi frequency band resonance of 2.4-2.5GHz, and a return loss of (-11.2) to (-6.5) dB; the feeding point 11, the common radiating arm 12, the second radiating arm 15 and the first grounding point 13 form a second antenna loop, generating a 1.5-1.6GHz GPS frequency band resonance, and a return loss of (-14.7) dB; the coupling antenna unit 2 is coupled with the radiating antenna unit 1 to form a coupling loop, generating a 5GHz WiFi frequency band resonance of 5.15-5.85GHz, and a return loss of (-12.7) dB.

[0041] Figure 3 is the antenna efficiency diagram of the three-in-one coupled antenna, please refer to Figure 3The feeding point 11, the common radiating arm 12, the first radiating arm 14 and the first grounding point 13 form a first antenna loop, generating a 2.4GHz WiFi frequency band resonance of 2.4-2.5GHz, and the antenna efficiency is (-8)~(-5)dB; the feeding point 11, the common radiating arm 12, the second radiating arm 15 and the first grounding point 13 form a second antenna loop, generating a 1.5-1.6GHz GPS frequency band resonance, and the return loss is (-11)~(-5)dB; the coupling antenna unit 2 is coupled with the radiating antenna unit 1 to form a coupling loop, generating a 5GHz WiFi frequency band resonance of 5.15-5.85GHz, and the return loss is (-6)~(-4)dB.

[0042] Example 2

[0043] The present embodiment provides a mobile device, including a shell, a middle frame, a mainboard 3 and the above-mentioned three-in-one coupling antenna; the middle frame is arranged in the shell; the mainboard 3 is arranged in the middle frame; the shell includes a front shell and a rear shell connected to each other; the three-in-one coupling antenna is arranged in the shell and is located on the rear shell, and the feeding point 11, the first grounding point 13 and the second grounding point 21 of the three-in-one coupling antenna are all electrically connected to the mainboard 3.

[0044] In the mobile device of this embodiment, the three-in-one coupling antenna is set on the back shell, and the GPS, 2.4GHz WiFi and 5GHz WIFI performance are realized under a smaller antenna clearance, and the space on the motherboard is not occupied separately, and the number of antennas is reduced. The smart device includes but is not limited to any one of a laptop, a tablet computer, and a mobile phone.

[0045] Figure 4 This is a schematic diagram of the connection between the three-in-one coupling antenna and the mainboard. Figure 4 In this embodiment, the three-in-one coupling antenna also includes a feeding spring pin 4, a first grounding spring pin 5 and a second grounding spring pin 6; the feeding point 11 is electrically connected to the mainboard 3 through the feeding spring pin 4; the first grounding point 13 is electrically connected to the mainboard 3 through the first grounding spring pin 5; the second grounding point 21 is electrically connected to the mainboard 3 through the second grounding spring pin 6.

[0046] In this embodiment, the mobile device further includes a substrate, and the three-in-one coupling antenna is disposed on the substrate and fixed to the rear housing through the substrate.

[0047] 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 three-in-one coupled antenna, characterized in that: It includes a radiation antenna unit and a coupling antenna unit; The radiating antenna unit comprises a feeding point, a common radiating arm, a first grounding point, a first radiating arm and a second radiating arm; The feeding point and the first grounding point are connected via the common radiating arm; The first radiating arm is connected to an end of the feeding point away from the first grounding point; the feeding point, the common radiating arm, the first radiating arm and the first grounding point form a first antenna loop; The second radiating arm is connected to an end of the feeding point away from the first grounding point; the feeding point, the common radiating arm, the second radiating arm and the first grounding point form a second antenna loop; The coupling antenna unit is located at a side of the feeding point away from the first grounding point, and is coupled with the radiating antenna unit to form a coupling loop.

2. The three-in-one coupled antenna according to claim 1, characterized in that: The working frequency band of the first antenna loop is the 2.4 GHz WiFi frequency band; the working frequency band of the second antenna loop is the GPS frequency band; and the working frequency band of the coupling antenna unit is the 5 GHz WiFi frequency band.

3. The three-in-one coupled antenna according to claim 2, characterized in that: The first radiating arm comprises a first connecting section and a first radiating section, the first connecting section is connected to the feeding point, and the first radiating section is connected to an end of the first connecting section away from the feeding point; The second radiating arm comprises a second connecting section and a second radiating section, the second connecting section is connected to the intersection of the first connecting section and the first radiating arm, and the second radiating section is connected to an end of the second connecting section away from the feeding point; The feeding point, the first connecting section and the second connecting section form a first coupling body coupled to the coupling antenna unit, the coupling antenna unit is located on one side of the first coupling body, and the first radiating section and the second radiating section both extend along a side of the first coupling body away from the coupling antenna unit.

4. The three-in-one coupled antenna according to claim 3, characterized in that: The coupling antenna unit includes a second grounding point and a second coupling body, wherein the second coupling body is connected to the second grounding point; the second grounding point is arranged close to the feeding point, and the second coupling body is coupled to the first coupling body.

5. The three-in-one coupled antenna according to claim 4, characterized in that: The distance between the first coupling body and the second coupling body is 0.5-2 mm.

6. The three-in-one coupled antenna according to claim 4, characterized in that: The shapes of the first coupling body and the second coupling body match each other.

7. The three-in-one coupled antenna according to claim 6, characterized in that: The first coupling body and the second coupling body are both in a straight line shape.

8. The three-in-one coupled antenna according to claim 3, characterized in that: The first radiation section is bent; the second radiation section is bent.

9. A mobile device, characterized in that: It comprises a shell, a middle frame, a main board and the three-in-one coupling antenna according to any one of claims 1 to 8; the middle frame is arranged in the shell; the main board is arranged in the middle frame; The shell includes a front shell and a rear shell connected to each other; the three-in-one coupling antenna is arranged in the shell and located on the rear shell, and the feeding point, the first grounding point and the second grounding point of the three-in-one coupling antenna are all electrically connected to the mainboard.

10. The mobile device according to claim 9, characterized in that: The three-in-one coupling antenna also includes a feeding spring pin, a first grounding spring pin and a second grounding spring pin; the feeding point is electrically connected to the mainboard through the feeding spring pin; the first grounding point is electrically connected to the mainboard through the first grounding spring pin; and the second grounding point is electrically connected to the mainboard through the second grounding spring pin.

Images