Coupled antenna and mobile device
By designing coupled antennas in smartphones, using the coupling of dual-frequency radiation and single-frequency radiation antennas, sharing dual-frequency feeding points and radiators, forming multiple antenna units and loop loops, solving the emission and reception in antenna design in the 5G era in the 5G era Performance challenges achieve multi-band operation and high standing wave efficiency in small size spaces.
Patent Information
- Application Number
- CN202420642662.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the 5G era, antenna design in smartphones faces the challenges of radio and reception performance, especially Mimo antennas are difficult to achieve high performance in limited clearance environments, and the full screen design occupies internal space, resulting in increased complexity of antenna design and difficult to be in small spaces. Achieve multiple operating frequency bands and high standing wave efficiency.
Design a coupling antenna, through the coupling of dual-frequency radiation antenna and single-frequency radiation antenna, use dual-frequency feeding points, radiators and grounding points to form multiple antenna units, share dual-frequency feeding points and radiators, and combine the connection section With the coupling arm, a loop loop is formed to realize multiple working frequency bands, and the resonant frequency is switched through matching circuits to enhance standing wave efficiency.
A variety of working frequency bands are realized in a small size space, which improves standing wave efficiency, is suitable for smaller antenna clearance environments in mobile devices, improves antenna performance and design difficulty, and is suitable for mobile terminals such as smartphones.
Smart Images
Figure CN222233859U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mobile equipment, and in particular relates to a coupling antenna and a mobile equipment. Background Art
[0002] With the advancement and development of the fifth generation of communication technology and the advent of the 5G era of smartphones, mobile phone users and network operators have an increasing demand for multimedia data such as video and audio streams. In mobile phones, antennas directly affect the communication capabilities of mobile phones, directly determine the radio and reception performance of mobile phones, and even the quality of antenna design determines the survival space of the mobile phone in the market. In order to support the increasing number of functions of smartphones, the number of antennas has doubled from the original 3 to more than 12, which greatly increases the design difficulty. In addition, the full-screen design occupies the internal space of the mobile phone, resulting in smaller and smaller antenna clearance and worse antenna design environment. Mimo antennas are usually distributed on both sides of the mobile phone where the antenna environment is poor. How to achieve higher performance under limited clearance has become an issue that must be considered in antenna design. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide a coupled antenna, in which a single-frequency radiating antenna is coupled with the first radiator and the second radiator to achieve multiple operating frequency bands in a small space and enhance standing wave efficiency.
[0004] The utility model provides a coupling antenna, comprising a dual-frequency radiating antenna and a single-frequency radiating antenna; the dual-frequency radiating antenna comprises a dual-frequency feeding point, a first radiator, a first grounding point, a second radiator and a second grounding point; the dual-frequency feeding point, the first radiator and the first grounding point are connected to form a first antenna unit; the first grounding point is located on one side of the dual-frequency feeding point, the second grounding point is located on a side of the dual-frequency feeding point away from the first grounding point, the dual-frequency feeding point, the second radiator and the second grounding point are connected to form a second antenna unit; the single-frequency radiating antenna comprises a single-frequency feeding point, a third radiator and a third grounding point, the single-frequency feeding point, the third radiator and the third grounding point are connected to form a third antenna unit; the single-frequency radiating antenna is located on one side of the dual-frequency radiating antenna, and is coupled with the first radiator and the second radiator.
[0005] The utility model provides a coupled antenna. In a dual-frequency radiating antenna, a first radiator and a second radiator share a dual-frequency feeding point to form a first antenna unit and a second antenna unit operating in two different frequency bands. A third antenna unit in a single-frequency radiating antenna operates in another frequency band. At the same time, the single-frequency radiating antenna is coupled with the first radiator and the second radiator to achieve multiple operating frequency bands in a small space and enhance standing wave efficiency.
[0006] Furthermore, the second radiator includes a connecting section and a first coupling arm, the dual-frequency feeding point and the grounding point are respectively connected to the two ends of the connecting section, one end of the first coupling arm is connected to the connecting section, and the other end extends toward the direction of the third radiator and is coupled with the third radiator. In the second radiator, the two ends of the connecting section are connected to the dual-frequency feeding point and the grounding point to form a loop, and the first coupling arm is used to couple with the third radiator to enhance the standing wave efficiency.
[0007] Furthermore, the third radiator includes a third coupling arm, the single-frequency feeding point and the third grounding point are respectively connected to the third coupling arm, and the third coupling arm is arranged in parallel with the first coupling arm. The two ends of the third coupling arm are connected to the single-frequency feeding point and the third grounding point to form a third antenna unit of a loop, and the third coupling arm is arranged in parallel with the first coupling arm, which is conducive to achieving coupling and ensuring a stable and uniform coupling effect.
[0008] Furthermore, a parallel distance between the third coupling arm and the first coupling arm is a coupling gap, and the coupling gap is no greater than 1 mm.
[0009] Furthermore, the connection between the first grounding point and the first radiator is connected to the first coupling arm, and the dual-frequency feeding point, the first radiator, the first coupling arm and the first grounding point are connected to form a first antenna unit. The first radiator is connected to the first coupling arm, and the first antenna unit and the second antenna unit share the dual-frequency feeding point. The first antenna unit and the second antenna unit form an antenna structure of an IFA antenna + loop antenna and operate in two different frequency bands. The first radiator and the second radiator share the first coupling arm to achieve coupling with the third coupling arm, thereby improving the standing wave efficiency of the first antenna unit and the second antenna unit.
[0010] Furthermore, the first antenna unit generates a resonant frequency of 1800-1880M, and the total length of the first radiator and the first radiator is 1 / 4-1 / 2 of the wavelength of the first antenna unit.
[0011] Furthermore, a center distance between the first radiator and the first coupling arm is no more than 30 mm.
[0012] Furthermore, the second antenna unit generates a resonant frequency of 2110-2170M, and the length of the second radiator is 1 / 4-1 / 2 of the wavelength of the second antenna unit; the third antenna unit generates a resonant frequency of 3300-4200M, and the length of the third radiator is 1 / 4-1 / 2 of the wavelength of the third antenna unit.
[0013] Furthermore, the coupling antenna further includes a matching circuit for switching the resonant frequency, the matching circuit is electrically connected to the second grounding point, and the resonant frequency switched by the matching circuit is different from the resonant frequencies of the first antenna unit, the second antenna unit, and the third antenna unit. By switching the resonant frequency through the matching circuit, more antenna resonances can be achieved in a limited space using the structure of the dual-frequency radiating antenna.
[0014] The utility model also provides a mobile device, including a shell, a middle frame, a mainboard and the above-mentioned coupling antenna; the middle frame is arranged in the shell, the mainboard and the coupling antenna are arranged in the middle frame, and the dual-frequency feeding point, the first grounding point, the second grounding point, the single-frequency feeding point and the third grounding point of the coupling antenna are electrically connected to the mainboard.
[0015] 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
[0016] Figure 1 It is a structural diagram of a coupled antenna.
[0017] Figure 2 It is the S11 parameter diagram of the dual-band radiating antenna.
[0018] Figure 3 It is the S11 parameter diagram of the single-frequency radiating antenna.
[0019] Figure 4 is the antenna efficiency diagram of the dual-band radiating antenna.
[0020] Figure 5 is the antenna efficiency diagram of a single-frequency radiating antenna. DETAILED DESCRIPTION
[0021] 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.
[0022] 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.
[0023] 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.
[0024] Example 1
[0025] This embodiment provides a coupled antenna. Figure 1 is a schematic diagram of the coupled antenna structure, see Figure 1 , the coupled antenna includes a dual-frequency radiating antenna 1 and a single-frequency radiating antenna 2;
[0026] The dual-frequency radiating antenna 1 comprises a dual-frequency feeding point 11, a first radiator 12, a first grounding point 13, a second radiator 14 and a second grounding point 15;
[0027] The dual-frequency feeding point 11, the first radiator 12 and the first grounding point 13 are connected to form a first antenna unit;
[0028] The first grounding point 13 is located at one side of the dual-frequency feeding point 11, the second grounding point 15 is located at a side of the dual-frequency feeding point 11 away from the first grounding point 13, and the dual-frequency feeding point 11, the second radiator 14 and the second grounding point 15 are connected to form a second antenna unit;
[0029] The single-frequency radiating antenna 2 comprises a single-frequency feeding point 21, a third radiator 22 and a third grounding point 23, and the single-frequency feeding point 21, the third radiator 22 and the third grounding point 23 are connected to form a third antenna unit;
[0030] The single-frequency radiating antenna 2 is located at one side of the dual-frequency radiating antenna 1 and is coupled with the first radiator 12 and the second radiator 14 .
[0031] In the coupled antenna provided in this embodiment, the first radiator 12 and the second radiator 14 of the dual-frequency radiating antenna 1 share the dual-frequency feeding point 11, forming a first antenna unit and a second antenna unit operating in two different frequency bands, and the third antenna unit in the single-frequency radiating antenna 2 operates in another frequency band. At the same time, the single-frequency radiating antenna 2 is coupled with the first radiator 12 and the second radiator 14, thereby realizing multiple operating frequency bands in a small space and enhancing the standing wave efficiency.
[0032] In this embodiment, the second radiator 14 includes a connecting section 141 and a first coupling arm 142, the dual-frequency feeding point 11 and the grounding point are respectively connected to the two ends of the connecting section 141, one end of the first coupling arm 142 is connected to the connecting section 141, and the other end extends toward the direction of the third radiator 22 and is coupled with the third radiator 22. In the second radiator 14, the two ends of the connecting section 141 are connected to the dual-frequency feeding point 11 and the grounding point to form a loop, and the first coupling arm 142 is used to couple with the third radiator 22 to enhance the standing wave efficiency.
[0033] In this embodiment, the third radiator 22 includes a third coupling arm 221, the single-frequency feeding point 21 and the third grounding point 23 are respectively connected to the third coupling arm 221, and the third coupling arm 221 is arranged in parallel with the first coupling arm 142. The two ends of the third coupling arm 221 are connected to the single-frequency feeding point 21 and the third grounding point 23 to form a third antenna unit of a loop, and the third coupling arm 221 is arranged in parallel with the first coupling arm 142, which is conducive to achieving coupling and ensuring a stable and uniform coupling effect.
[0034] In this embodiment, the parallel distance between the third coupling arm 221 and the first coupling arm 142 is a coupling gap, and the coupling gap is no greater than 1 mm. The coupling gap is controlled to ensure the coupling effect.
[0035] In this embodiment, the connection between the first grounding point 13 and the first radiator 12 is connected to the first coupling arm 142, and the dual-frequency feeding point 11, the first radiator 12, the first coupling arm 142 and the first grounding point 13 are connected to form a first antenna unit. The first radiator 12 is connected to the first coupling arm 142, and the first antenna unit and the second antenna unit share the dual-frequency feeding point 11. The first antenna unit and the second antenna unit form an antenna structure of an IFA antenna + loop antenna and operate in two different frequency bands. The first radiator 12 and the second radiator 14 share the first coupling arm 142 to achieve coupling with the third coupling arm 221, thereby improving the standing wave efficiency of the first antenna unit and the second antenna unit. Specifically, the first coupling arm 142 is straight.
[0036] In one embodiment, the distance between the first radiator 12 and the first coupling arm 142 is not greater than 30 mm. The distance between the first radiator 12 and the first coupling arm 142 is controlled to achieve coupling. The distance between the first radiator 12 and the first coupling arm 142 refers to the distance between the end of the first radiator 12 close to the first ground point 13 and the end of the first coupling arm 142 close to the third coupling arm 221.
[0037] In one embodiment, the coupling antenna further includes a common radiating arm 16, one end of the common radiating arm 16 is connected to the dual-frequency feeding point 11, and the other end is connected to the first radiator 12 and the second radiator 14. Thus, the dual-frequency feeding point 11, the common radiating arm 16, the first radiator 12, the first grounding point 13 and the first coupling arm 142 form the first antenna unit of the IFA antenna structure, the dual-frequency feeding point, the common radiating arm 16, the connecting section 141 of the second radiating arm, the first coupling arm 142 and the second grounding point 15 form the second antenna unit of the loop antenna structure, respectively generating two resonant frequencies, and the third antenna unit formed by the single-frequency radiating antenna 2 generates a third resonant frequency, and improves the standing wave resonance through coupling. In order to match the various components inside the mobile device, the common radiating arm 16 is in a bent structure for avoidance.
[0038] Specifically, the first radiator is bent, one end of which is connected to the common radiating arm 16, and the other end is connected to the first grounding point 13, so that the dual-frequency feeding point 11, the common radiating arm 16, the first radiator 12, the first grounding point 13 and the first coupling arm 142 form an IFA antenna structure.
[0039] In this embodiment, the first antenna unit generates a resonance frequency of 1800-1880M, and the total length of the first radiator 12 and the first radiator is 1 / 4-1 / 2 of the wavelength of the first antenna unit.
[0040] The second antenna unit generates a resonance frequency of 2110-2170M, and the length of the second radiator 14 is 1 / 4-1 / 2 of the wavelength of the second antenna unit; the third antenna unit generates a resonance frequency of 3300-4200M, and the length of the third radiator 22 is 1 / 4-1 / 2 of the wavelength of the third antenna unit.
[0041] In this embodiment, the coupling antenna further includes a matching circuit for switching the resonant frequency, the matching circuit is electrically connected to the second grounding point 15, and the resonant frequency switched by the matching circuit is different from the resonant frequencies of the first antenna unit, the second antenna unit, and the third antenna unit. By switching the resonant frequency through the matching circuit, more antenna resonances can be achieved in a limited space using the structure of the dual-frequency radiation antenna 1.
[0042] In one embodiment, the first antenna unit generates a medium frequency resonance frequency of 1800-1880M, the second antenna unit generates a high frequency resonance frequency of 2110-2170M, and the third antenna unit generates an ultra-high frequency resonance frequency of 3300-4200M. At the same time, a matching circuit is used to achieve resonance frequencies of 2300-2400M and 2500-2700M.
[0043] Figure 2 This is the S11 parameter diagram of the dual-band radiating antenna 1, please refer to Figure 2Under the smaller antenna clearance of 1mm, the first antenna unit generates a medium frequency resonance frequency of 1800-1880M, resulting in a -3.6dB return loss; the second antenna unit generates a high frequency resonance frequency of 2110-2170M, resulting in a -3.3db return loss; the high frequency resonance frequency of 2300-2400M achieved by the matching circuit generates a -2.7db return loss, and the high frequency resonance frequency of 2500-2700M achieved by the matching circuit generates a (-2.5)~(-1.9)dB return loss.
[0044] Figure 3 This is the S11 parameter diagram of the single-frequency radiating antenna 2. Please refer to Figure 3 The third antenna unit generates an ultra-high frequency resonance frequency of 3300-4200M, resulting in a return loss of (-3) to (-2.3) dB.
[0045] Figure 4 is the antenna efficiency diagram of dual-band radiating antenna 1, please refer to Figure 4 The antenna efficiency of the first antenna unit generating a medium frequency resonant frequency of 1800-1880M is -11.4dB, the antenna efficiency of the second antenna unit generating a high frequency resonant frequency of 2110-2170M is -9.4dB, the antenna efficiency of the high frequency resonant frequency of 2300-2400M achieved by the matching circuit is -9.4dB, and the antenna efficiency of the high frequency resonant frequency of 2500-2700M achieved by the matching circuit is -9.2dB.
[0046] Figure 5 is the antenna efficiency diagram of single-frequency radiating antenna 2, please refer to Figure 5 , the antenna efficiency of the third antenna unit generating an ultra-high frequency resonance frequency of 3300-4200M is -10.8dB.
[0047] The coupled antenna of this embodiment has a compact structure, and utilizes coupling to improve the antenna standing wave efficiency, achieves wideband and high efficiency, and can work in multiple antenna frequency bands, and is suitable for antenna design in a mobile device with a small antenna clearance environment. The coupled antenna of this embodiment can be applied to mobile terminals such as laptops, tablet computers, and mobile phones.
[0048] Example 2
[0049] The present embodiment provides a mobile device, including a shell, a middle frame, a mainboard and the coupling antenna of Embodiment 1; the middle frame is arranged in the shell, the mainboard and the coupling antenna are arranged in the middle frame, and the dual-frequency feeding point 11, the first grounding point 13, the second grounding point 15, the single-frequency feeding point 21 and the third grounding point 23 of the coupling antenna are electrically connected to the mainboard.
[0050] In this embodiment, a dual-frequency feeding terminal, a first grounding terminal, a second grounding terminal, a single-frequency feeding terminal and a third grounding terminal are provided on the main board, and are electrically connected to the dual-frequency feeding point 11, the first grounding point 13, the second grounding point 15, the single-frequency feeding point 21 and the third grounding point 23 through metal springs respectively.
[0051] In one embodiment, the matching circuit in the coupling antenna is disposed on the mainboard and electrically connected to the second ground terminal, and the matching circuit is electrically connected to the second ground point 15 through a metal spring.
[0052] 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 coupled antenna, characterized in that: Including dual-frequency radiating antenna and single-frequency radiating antenna; The dual-frequency radiating antenna comprises a dual-frequency feeding point, a first radiator, a first grounding point, a second radiator and a second grounding point; The dual-frequency feeding point, the first radiator and the first grounding point are connected to form a first antenna unit; The first grounding point is located at one side of the dual-frequency feeding point, the second grounding point is located at a side of the dual-frequency feeding point away from the first grounding point, and the dual-frequency feeding point, the second radiator and the second grounding point are connected to form a second antenna unit; The single-frequency radiating antenna comprises a single-frequency feeding point, a third radiator and a third grounding point, and the single-frequency feeding point, the third radiator and the third grounding point are connected to form a third antenna unit; The single-frequency radiating antenna is located at one side of the dual-frequency radiating antenna and is coupled with the first radiator and the second radiator.
2. The coupled antenna according to claim 1, characterized in that: The second radiator includes a connecting section and a first coupling arm, the dual-frequency feeding point and the grounding point are respectively connected to the two ends of the connecting section, one end of the first coupling arm is connected to the connecting section, and the other end extends toward the direction of the third radiator and forms a coupling with the third radiator.
3. The coupling antenna according to claim 2, characterized in that: The third radiator comprises a third coupling arm, the single-frequency feeding point and the third grounding point are respectively connected to the third coupling arm, and the third coupling arm is arranged in parallel with the first coupling arm.
4. The coupling antenna according to claim 3, characterized in that: A parallel distance between the third coupling arm and the first coupling arm is a coupling gap, and the coupling gap is no greater than 1 mm.
5. The coupling antenna according to claim 4, characterized in that: The connection point between the first ground point and the first radiator is connected to the first coupling arm, and the dual-frequency feeding point, the first radiator, the first coupling arm and the first ground point are connected to form a first antenna unit.
6. The coupling antenna according to claim 5, characterized in that: The first antenna unit generates a resonant frequency of 1800-1880M, and the total length of the first radiator and the first radiator is 1 / 4-1 / 2 of the wavelength of the first antenna unit.
7. The coupling antenna according to claim 5, characterized in that: The distance between the first radiator and the first coupling arm is no more than 30 mm.
8. The coupled antenna according to claim 1, characterized in that: The second antenna unit generates a resonance frequency of 2110-2170M, and the length of the second radiator is 1 / 4-1 / 2 of the wavelength of the second antenna unit; The third antenna unit generates a resonance frequency of 3300-4200M, and the length of the third radiator is 1 / 4-1 / 2 of the wavelength of the third antenna unit.
9. The coupled antenna according to claim 1, characterized in that: It also includes a matching circuit for switching the resonant frequency, the matching circuit is electrically connected to the second grounding point, and the resonant frequency switched by the matching circuit is different from the resonant frequencies of the first antenna unit, the second antenna unit and the third antenna unit.
10. A mobile device, characterized in that: It comprises a housing, a middle frame, a mainboard and the coupling antenna according to any one of claims 1 to 9; The middle frame is arranged in the shell, the mainboard and the coupling antenna are arranged in the middle frame, and the dual-frequency feeding point, the first grounding point, the second grounding point, the single-frequency feeding point and the third grounding point of the coupling antenna are electrically connected to the mainboard.