Three-in-one antenna structure and mobile terminal

Abstract

The utility model discloses a three-in-one antenna structure and a mobile terminal, and relates to the technical field of antennae, the three-in-one antenna structure comprises an antenna body and a coupling structure, the antenna body comprises a feed pin, a feed ground pin, a first resonance branch knot and a second resonance branch knot, the second resonance branch knot is connected with one end of the first resonance branch knot in the length direction, and the coupling structure is connected with the feed pin. The feed pin and the feed ground pin are connected with the first resonance branch knot and the second resonance branch knot. The coupling structure comprises a first coupling part, a second coupling part and a third coupling part, the first coupling part is arranged on one side opposite to the feed pin along the width direction of the first resonance branch knot, and two ends of the first coupling part along the length direction are respectively coupled with the first resonance branch knot and the second resonance branch knot; the second coupling part is arranged on the side, back to the first coupling part, of the width direction of the first resonance branch, the third coupling part is arranged on the side, back to the first resonance branch, of the width direction of the second resonance branch, the second coupling part is coupled with the first resonance branch, and the third coupling part is coupled with the second resonance branch.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a three-in-one antenna structure and a mobile terminal. Background Art

[0002] With the rapid development of wireless communication technology, communication electronic products are being updated and iterated at an increasingly rapid pace, placing increasing demands on antenna performance and size. Currently, most dual-band Wi-Fi + GPS three-in-one antennas designed on the market use three separate branches to resonate and generate the resonant frequencies of the dual-band Wi-Fi and GPS, respectively. While this design is simple and easy to implement, space constraints limit the antenna bandwidth. Furthermore, the relatively low frequency of GPS requires longer resonant branches, which increases the antenna space required. This makes it difficult to maintain bandwidth within the small size of the three-in-one antenna. Utility Model Content

[0003] The main purpose of the utility model is to provide a three-in-one antenna structure and a mobile terminal, aiming to expand the bandwidth of the antenna while keeping the size of the three-in-one antenna small.

[0004] To achieve the above objectives, the present invention proposes a three-in-one antenna structure, comprising:

[0005] An antenna body, the antenna body comprising a feed pin, a ground feed pin, a first resonant branch node, and a second resonant branch node, the second resonant branch node being connected to one end of the first resonant branch node in the length direction, the feed pin and the ground feed pin being both connected to the first resonant branch node and the second resonant branch node;

[0006] A coupling structure, the coupling structure includes a first coupling portion, a second coupling portion, and a third coupling portion, the first coupling portion being arranged on a side facing away from the feeding pin along the width direction of the first resonant branch node, the two ends of the first coupling portion along the length direction being coupled to the first resonant branch node and the second resonant branch node respectively, the second coupling portion being arranged on a side facing away from the first coupling portion in the width direction of the first resonant branch node, the third coupling portion being arranged on a side facing away from the first resonant branch node in the width direction, the second coupling portion being coupled to the first resonant branch node, and the third coupling portion being coupled to the second resonant branch node.

[0007] In one embodiment, the antenna body further includes a feed and ground feed branch, the feed pin and the ground feed pin are both connected to the feed and ground feed branch, and the second coupling portion and the third coupling portion are respectively arranged on both sides of the feed and ground feed branch in the width direction.

[0008] In one embodiment, the length direction of the first resonant branch is parallel to the length directions of the first coupling portion and the second coupling portion, and the length direction of the second resonant branch is parallel to the length directions of the first coupling portion and the third coupling portion.

[0009] In one embodiment, the length of the first coupling portion is greater than the sum of the lengths of the first resonant branch and the second resonant branch, the length of the second coupling portion is greater than the length of the first resonant branch, and the length of the third coupling portion is greater than the length of the second resonant branch.

[0010] In one embodiment, the width of the first resonant branch is greater than that of the second resonant branch, and the first resonant branch is flush with a side of the second resonant branch close to the first coupling portion.

[0011] In one embodiment, the three-in-one antenna structure is designed in a three-dimensional manner, the first resonant branch and the second resonant branch are perpendicular to the feeding and grounding branches, the first coupling portion is arranged coplanar with the first resonant branch, and the second coupling portion and the third coupling portion are arranged coplanar with the feeding and grounding branches.

[0012] In one embodiment, the three-in-one antenna structure is an FPC antenna, and the first coupling portion, the second coupling portion, and the third coupling portion are coupling patches.

[0013] In one embodiment, the power feeding pin and the ground feeding pin are both gold-plated.

[0014] In one embodiment, the operating frequencies of the three-in-one antenna structure are 1500-3000 MHz and 5000-6000 MHz.

[0015] The present invention further provides a mobile terminal, comprising a three-in-one antenna structure, wherein the three-in-one antenna structure comprises:

[0016] An antenna body, the antenna body comprising a feed pin, a ground feed pin, a first resonant branch node, and a second resonant branch node, the second resonant branch node being connected to one end of the first resonant branch node in the length direction, the feed pin and the ground feed pin being both connected to the first resonant branch node and the second resonant branch node;

[0017] A coupling structure, the coupling structure includes a first coupling portion, a second coupling portion, and a third coupling portion, the first coupling portion being arranged on a side facing away from the feeding pin along the width direction of the first resonant branch node, the two ends of the first coupling portion along the length direction being coupled to the first resonant branch node and the second resonant branch node respectively, the second coupling portion being arranged on a side facing away from the first coupling portion in the width direction of the first resonant branch node, the third coupling portion being arranged on a side facing away from the first resonant branch node in the width direction, the second coupling portion being coupled to the first resonant branch node, and the third coupling portion being coupled to the second resonant branch node.

[0018] This utility model integrates multiple functions into a single antenna unit. Even with limited installation space within a mobile terminal, the second resonant branch is connected to the first resonant branch and coupled to the first, second, and third coupling sections, respectively. This enables the three-in-one antenna structure to receive and transmit GPS, Wi-Fi, and BT signals across different frequency bands. This improves antenna performance, minimizes the size of the three-in-one antenna structure, and expands its bandwidth, enhancing its applicability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of an embodiment of a three-in-one antenna structure provided by the present invention;

[0021] Figure 2 for Figure 1 The expanded diagram of the three-in-one antenna structure;

[0022] Figure 3 for Figure 1 Schematic diagram of the return loss results of the actual test of the three-in-one antenna structure;

[0023] Figure 4 for Figure 1 Schematic diagram of the standing wave ratio results of the actual test of the three-in-one antenna structure.

[0024] Description of Figure Numbers:

[0025] 1000. Three-in-one antenna structure; 1. Antenna body; 11. Feed and ground feed branches; 111. Feed pin; 112. Ground feed pin; 12. First resonant branch; 13. Second resonant branch; 2. Coupling structure; 21. First coupling part; 22. Second coupling part; 23. Third coupling part.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] With the rapid development of wireless communication technology, communication electronic products are being updated and iterated at an increasingly rapid pace, placing increasing demands on antenna performance and size. Currently, most dual-band Wi-Fi + GPS three-in-one antennas designed on the market use three separate branches to resonate and generate the resonant frequencies of the dual-band Wi-Fi and GPS, respectively. While this design is simple and easy to implement, space constraints limit the antenna bandwidth. Furthermore, the relatively low frequency of GPS requires longer resonant branches, which increases the antenna space required. This makes it difficult to maintain bandwidth within the small size of the three-in-one antenna.

[0031] To solve the above problems, please refer to Figures 1 to 4 The present invention proposes a three-in-one antenna structure 1000, including an antenna body 1 and a coupling structure 2. The antenna body 1 includes a feed pin 111, a ground feed pin 112, a first resonant branch 12, and a second resonant branch 13. The second resonant branch 13 is connected to one end of the first resonant branch 12 in the length direction. The feed pin 111 and the ground feed pin 112 are both connected to the first resonant branch 12 and the second resonant branch 13. The coupling structure 2 includes a first coupling portion 21, a second coupling portion 22, and a third coupling portion 23. The first coupling portion The first coupling portion 21 is provided on a side of the first resonant branch 12 facing away from the feeding pin 111 along the width direction of the first resonant branch 12. The first coupling portion 21 is coupled to the first resonant branch 12 and the second resonant branch 13 at both ends along the length direction. The second coupling portion 22 is provided on a side of the first resonant branch 12 facing away from the first coupling portion 21 in the width direction. The third coupling portion 23 is provided on a side of the second resonant branch 13 facing away from the first resonant branch 12 in the width direction. The second coupling portion 22 is coupled to the first resonant branch 12, and the third coupling portion 23 is coupled to the second resonant branch 13.

[0032] The technical solution of this utility model integrates multiple functions into a single antenna unit. Even with limited installation space within a mobile terminal, by connecting the second resonant branch 13 to the first resonant branch 12 and coupling it to the first coupling portion 21, the second coupling portion 22, and the third coupling portion 23, the three-in-one antenna structure 1000 can receive and transmit GPS, Wi-Fi, and BT signals across different frequency bands. This improves antenna performance, minimizes the size of the three-in-one antenna structure 1000, and expands the antenna's bandwidth, enhancing its applicability and practicality.

[0033] In an optional embodiment, to facilitate the arrangement of the feed pin 111 and the ground feed pin 112, the antenna body 1 further includes a feed and ground feed branch 11, the feed pin 111 and the ground feed pin 112 are both connected to the feed and ground feed branch 11, and the second coupling portion 22 and the third coupling portion 23 are respectively arranged on both sides of the feed and ground feed branch 11 in the width direction. Figure 1 and Figure 2By providing a common connection point for the feed pin 111 and the ground feed pin 112 by providing a feed branch 11 on the antenna body, the antenna's internal wiring structure is simplified while also improving signal transmission efficiency and overall performance. This facilitates providing a more compact antenna layout for the three-in-one antenna structure 1000, making the design of the three-in-one antenna structure 1000 more flexible and facilitating its integration into mobile terminal devices. Furthermore, this design helps reduce signal loss and external interference during the operation of the three-in-one antenna structure 1000, thereby improving communication stability and reliability.

[0034] In an alternative embodiment, please refer to Figure 1 and Figure 2 To ensure the operating efficiency of the three-in-one antenna structure 1000, the length of the first resonant branch 12 is parallel to the lengths of the first coupling portion 21 and the second coupling portion 22, and the length of the second resonant branch 13 is parallel to the lengths of the first coupling portion 21 and the third coupling portion 23. By arranging the first resonant branch 12, the second resonant branch 13, the first radiating portion, the second radiating portion, and the third radiating portion in parallel, the uniformity of the gaps between the first and second resonant branches 12, 13 and each coupling portion is ensured, which helps optimize the radiation pattern of the three-in-one antenna structure 1000 and reduce interference between different frequency bands. This makes the three-in-one antenna structure 1000 more accurate in signal transmission during operation, reducing signal leakage and interference.

[0035] In an optional embodiment, to ensure the operating efficiency of the three-in-one antenna structure 1000, the length of the first coupling portion 21 is greater than the sum of the lengths of the first resonant branch 12 and the second resonant branch 13, the length of the second coupling portion 22 is greater than the length of the first resonant branch 12, and the length of the third coupling portion 23 is greater than the length of the second resonant branch 13. By setting the length of the first coupling portion 21 to be the longest, both the first resonant branch 12 and the second resonant branch 13 can couple radiated signals with the first coupling portion 21, thereby simplifying the structure of the three-in-one antenna structure 1000. The second coupling portion 22 and the third coupling portion 23 are respectively disposed on the sides of the first resonant branch 12 and the second resonant branch 13 facing away from the first coupling portion 21, facilitating coupling between the first resonant branch 12 and the second coupling portion 22, and between the second resonant branch 13 and the third coupling portion 23. This helps improve the bandwidth and coverage of the three-in-one antenna structure 1000, enabling the three-in-one antenna structure 1000 to adapt to a wider range of communication standards and application scenarios.

[0036] Specifically, the first radiation branch and the first coupling part 21 and the third coupling part 23 can couple and radiate 5GWIFI signals with an operating frequency range of 5000-6000MHz, and the second radiation branch and the first coupling part 21 and the third coupling part 23 can couple and radiate 2.4G WIFI / BT+GPS signals with an operating frequency range of 1500-3000MHz. In this way, the three-in-one antenna structure 1000 in this solution can cover the operating frequency range of 2.4G WIFI antenna, BT antenna, GPS antenna and 5GWIFI antenna, greatly expanding the bandwidth of the three-in-one antenna structure 1000 and improving the working efficiency of the three-in-one antenna structure 1000.

[0037] In an optional embodiment, the width of the first resonant branch 12 is greater than the width of the second resonant branch 13, and the first resonant branch 12 and the second resonant branch 13 are flush with each other on the side closest to the first coupling portion 21. This structure optimizes the frequency band coverage of the three-in-one antenna structure 1000, allowing the three-in-one antenna structure 1000 to operate more effectively in different frequency ranges, thereby improving the adaptability and versatility of the three-in-one antenna structure 1000. In addition, this design helps improve the manufacturing flexibility and cost-effectiveness of the three-in-one antenna structure 1000.

[0038] In an optional embodiment, to facilitate the installation and arrangement of the three-in-one antenna structure 1000 in the mobile terminal, please refer to Figure 1 The three-in-one antenna structure 1000 is designed in a three-dimensional manner. The first resonant branch 12 and the second resonant branch 13 are perpendicular to the feed and ground branch 11. The first coupling portion 21 is arranged coplanar with the first resonant branch 12, and the second coupling portion 22 and the third coupling portion 23 are arranged coplanar with the feed and ground branch 11. Providing the three-in-one antenna structure 1000 as a three-dimensional structure allows it to be arranged within a limited space. The three-dimensional layout also helps isolate signals of different frequency bands and reduce mutual interference between components. This improves the space utilization and operating performance of the three-in-one antenna structure 1000, making the three-in-one antenna structure 1000 more compact and easier to integrate into mobile terminal devices. In this embodiment, the first resonant branch 12 and the second resonant branch 13 are arranged perpendicular to the feed and ground branch 11. In other embodiments, the first resonant branch 12, the second resonant branch 13 and the feed and ground branch 11 can also be arranged at other angles, which can be selected according to actual needs.

[0039] In an optional embodiment, the three-in-one antenna structure 1000 is an FPC antenna, and the first coupling portion 21, the second coupling portion 22, and the third coupling portion 23 are coupling patches. By using an FPC (flexible printed circuit) as the substrate for the three-in-one antenna structure 1000, the three-in-one antenna structure 1000 can be manufactured more flexibly, making it easier to install and integrate. This improves the flexibility and plasticity of the three-in-one antenna structure 1000, allowing it to adapt to various device shapes. The lightweight and thin nature of the FPC antenna also helps reduce device weight and improve portability. Furthermore, by using coupling patches to manufacture the three-in-one antenna structure 1000, it not only facilitates the integrated installation of the three-in-one antenna structure 1000, but also facilitates operation over a wider frequency range, making it compatible with multiple wireless communication standards.

[0040] In an optional embodiment, both the feed pin 111 and the ground feed pin 112 are gold-plated. Gold plating improves the metal's conductivity and corrosion resistance. This improves the conductivity of the feed pin 111 and the ground feed pin 112, reduces signal transmission losses, and extends the service life of the three-in-one antenna structure 1000. This contributes to improving the reliability and durability of the three-in-one antenna structure 1000.

[0041] The following is a detailed description of a specific implementation of the three-in-one antenna structure 1000 in this solution:

[0042] like Figure 1 and Figure 2The three-in-one antenna structure 1000 shown in FIG. 1 includes a ground feed pin 112, a power feed pin 111, a first resonant branch 12, a second resonant branch 13, a first coupling portion 21, a second coupling portion 22, and a third coupling portion 23. The motherboard-side power feed pin is connected to the feed pin 111, and the motherboard-side ground pin is connected to the ground feed pin 112. To achieve the corresponding resonant frequency, the second resonant branch 13 is first set to a quarter wavelength of 2.4G Wi-Fi, and the first resonant branch 12 is set to a quarter wavelength of 5G Wi-Fi. In order to broaden the antenna bandwidth and meet the requirements of covering the dual-band WIFI+GPS frequency band, a method of loading with three coupling patches is adopted. The loop between the antenna feed pin 111 and the antenna ground feed pin 112 is regarded as the ground inductance L, and the coupling between the resonant branch and the coupling patch is regarded as the coupling capacitance C. According to f=1 / (2*Pi*Sqrt(L*C)), the corresponding resonant frequency f can be obtained by properly adjusting the value of LC. In actual debugging, the value of L is adjusted by optimizing the length of the first resonant branch 12 and the second resonant branch 13, and the value of C is adjusted by optimizing the size of the three coupling patches and the gap between each coupling patch and each resonant branch, thereby achieving the purpose of designing a dual-band WIFI+GPS three-in-one antenna structure 1000 with only two resonant branches. The final three-in-one antenna structure 1000 has a body size of only 18.1mm*12.3mm, and the size of the entire FPC antenna is 29.7*18.2mm. Figure 3 The figure shows the return loss result of the actual test. The designed antenna covers the 2.4G WIFI / BT, 5G WIFI, GPS and other frequency bands, with a frequency range of 1500-3000MHz and 5000-6000MHz, which can well solve the antenna design problem with higher bandwidth requirements. Figure 4 The figure shows the actual tested VSWR results. The VSWRs of 2.4G WIFI / BT, 5G WIFI, and GPS in the corresponding frequency bands are all less than 2. In addition, the actual tested antenna efficiency is above 30%, meeting the design requirements of the three-in-one antenna structure 1000.

[0043] The present invention also provides a mobile terminal, which includes a three-in-one antenna structure 1000. The specific structure of the three-in-one antenna structure 1000 refers to the above embodiments. Since the mobile terminal adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described one by one here.

[0044] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A three-in-one antenna structure, characterized in that: include: An antenna body, the antenna body comprising a feed pin, a ground feed pin, a first resonant branch node, and a second resonant branch node, the second resonant branch node being connected to one end of the first resonant branch node in the length direction, the feed pin and the ground feed pin being both connected to the first resonant branch node and the second resonant branch node; A coupling structure, the coupling structure includes a first coupling portion, a second coupling portion, and a third coupling portion, the first coupling portion being arranged on a side facing away from the feeding pin along the width direction of the first resonant branch node, the two ends of the first coupling portion along the length direction being coupled to the first resonant branch node and the second resonant branch node respectively, the second coupling portion being arranged on a side facing away from the first coupling portion in the width direction of the first resonant branch node, the third coupling portion being arranged on a side facing away from the first resonant branch node in the width direction, the second coupling portion being coupled to the first resonant branch node, and the third coupling portion being coupled to the second resonant branch node.

2. The three-in-one antenna structure according to claim 1, wherein: The antenna body further includes a feed and ground feed branch, the feed pin and the ground feed pin are both connected to the feed and ground feed branch, and the second coupling portion and the third coupling portion are respectively arranged on both sides of the feed and ground feed branch in a width direction.

3. The three-in-one antenna structure according to claim 2, wherein: The length direction of the first resonant branch is parallel to the length directions of the first coupling portion and the second coupling portion, and the length direction of the second resonant branch is parallel to the length directions of the first coupling portion and the third coupling portion.

4. The three-in-one antenna structure according to any one of claims 2 to 3, wherein: The length of the first coupling portion is greater than the sum of the lengths of the first resonant branch and the second resonant branch, the length of the second coupling portion is greater than the length of the first resonant branch, and the length of the third coupling portion is greater than the length of the second resonant branch.

5. The three-in-one antenna structure according to claim 4, wherein: The width of the first resonant branch is greater than that of the second resonant branch, and the first resonant branch is flush with a side of the second resonant branch close to the first coupling portion.

6. The three-in-one antenna structure according to claim 5, wherein: The three-in-one antenna structure is three-dimensionally designed, the first resonant branch and the second resonant branch are perpendicular to the power and ground feeding branches, the first coupling portion is coplanar with the first resonant branch, and the second coupling portion and the third coupling portion are coplanar with the power and ground feeding branches.

7. The three-in-one antenna structure according to claim 6, wherein: The three-in-one antenna structure is an FPC antenna, and the first coupling portion, the second coupling portion, and the third coupling portion are coupling patches.

8. The three-in-one antenna structure according to claim 7, wherein: The power feeding pin and the ground feeding pin are both gold-plated.

9. The three-in-one antenna structure according to claim 7, wherein: The operating frequencies of the three-in-one antenna structure are 1500-3000 MHz and 5000-6000 MHz.

10. A mobile terminal, characterized in that: The invention comprises the three-in-one antenna structure according to any one of claims 1 to 9.

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