IFA-based parasitic coupling multi-band antenna and communication equipment

Abstract

The invention provides an IFA-based spurious coupling multi-band antenna and communication equipment. The IFA-based spurious coupling multi-band antenna comprises a base material and an antenna structure, the base material is provided with a feeding point, an antenna foot and a parasitic foot. The antenna structure comprises a connecting arm, a first radiation arm, a second radiation arm and a third radiation arm, wherein the connecting arm, the first radiation arm, the second radiation arm and the third radiation arm are all arranged on a base material; the connecting arm comprises a first connecting part and a second connecting part which are connected with each other. Compared with the prior art, the IFA-based parasitic coupling multi-frequency-band antenna has the advantages that through the multiple radiation arms and the two gaps, the antenna generates multiple resonances, the working frequency band is widened, the antenna efficiency is better, the low-frequency, intermediate-frequency and high-frequency working frequency bands can be covered, and multi-frequency-band full coverage is achieved; under the condition of not increasing the occupied internal space of the communication equipment, the working frequency band is wider, the space occupied by the antenna is very small, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically to an IFA-based parasitic coupled multi-band antenna and communication equipment. Background Technology

[0002] With the rapid development of terminal electronic products, communication devices such as smartphones are being upgraded particularly quickly, evolving from the 2G era to the current 5G era. 5G smartphones have increasingly larger screens, smaller antenna clearances, and require more and more frequency bands. The number of antennas in 5G smartphones is increasing, and the antenna layout is becoming more compact. Especially now that mainstream 5G smartphones are mostly full-screen designs, the reduced antenna clearance makes the internal structure more complex. Furthermore, existing antennas can only cover one operating frequency band per antenna, resulting in relatively poor performance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and to provide an IFA-based parasitic coupling multi-band antenna and communication device.

[0004] One embodiment of the present invention provides an IFA-based parasitic coupled multi-band antenna, comprising: a substrate and an antenna structure;

[0005] The substrate is provided with a feed point, an antenna ground foot, and a parasitic ground foot; The antenna structure includes a connecting arm, a first radiating arm, a second radiating arm, and a third radiating arm, all of which are disposed on the substrate. The connecting arm includes a first connecting part and a second connecting part that are connected to each other. The first connecting part is located on one side of the first radiating arm and forms a first antenna gap with the first radiating arm. The first connecting part is connected to the feed point, and the second connecting part is connected to the antenna ground foot. A second antenna gap is formed between the first connecting part and the second connecting part. The second radiating arm is connected to the second connecting part; The third radiating arm is connected to the third connecting part; The first radiating arm and the feed point are coupled through the first antenna slot, and the feed point, the first radiating arm and the parasitic ground foot constitute the first antenna loop; The feed point, the second radiating arm, and the antenna ground pin constitute the second antenna loop; The feed point, the third radiating arm, and the antenna ground foot constitute the third antenna loop.

[0006] In some alternative embodiments, a first extension is formed on the side of the first radiating arm near the first connecting portion, and the parasitic foot is connected to the first extension.

[0007] In some optional embodiments, the first connecting portion and the second connecting portion are arranged sequentially along a preset direction, and the first radiating arm extends in the opposite direction to the preset direction.

[0008] In some optional embodiments, the first connecting portion and the second connecting portion are arranged sequentially along a preset direction, and the second radiating arm and the third radiating arm extend toward the preset direction.

[0009] In some alternative embodiments, a clearance space is provided on the substrate, the clearance space being located on the side of the second connection portion away from the antenna foot, and the second radiating arm extends around the clearance space.

[0010] In some alternative embodiments, a second extension is formed on the side of the second connection portion away from the third radiating arm, and the second extension extends away from the third radiating arm.

[0011] In some alternative implementations, the operating frequency band corresponding to the first antenna loop is 2.3-2.6 GHz.

[0012] In some alternative implementations, the operating frequency band corresponding to the second antenna loop is 1.7-2.1 GHz.

[0013] In some optional implementations, the operating frequency band corresponding to the third antenna loop is 0.8-0.9 GHz.

[0014] Another embodiment of the present invention provides a communication device, including: a housing and an IFA-based parasitic coupled multi-band antenna as described above, wherein the substrate is disposed within the housing.

[0015] Compared to existing technologies, the parasitic coupling multi-band antenna based on IFA of this invention generates multiple resonances through multiple radiating arms and two gaps, resulting in a wider operating frequency band, better antenna efficiency, and up to three antenna resonances. This covers the low, mid, and high frequency bands, achieving full multi-band coverage. Furthermore, it achieves a wider operating frequency band without increasing the internal space occupied by the communication equipment, and the antenna occupies very little equipment space, which helps reduce the number of antennas while meeting antenna design requirements and lowering costs.

[0016] To provide a clearer understanding of the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of an IFA-based parasitic coupling multi-band antenna according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first radiating arm according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the connecting arm, the second radiating arm, and the third radiating arm according to an embodiment of the present invention; Figure 4 This is a schematic diagram of S11 parameters for an IFA-based parasitic coupled multi-band antenna according to an embodiment of the present invention; Figure 5 This is an antenna efficiency diagram of an IFA-based parasitic coupled multi-band antenna according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Substrate; 11. Feed point; 12. Antenna foot; 13. Parasitic foot; 14. Clearance space; 20. Antenna structure; 21. Connecting arm; 211. First connecting part; 212. Second connecting part; 213. First antenna slot; 214. Second antenna slot; 215. Second extension; 22. First radiating arm; 221. First extension; 23. Second radiating arm; 24. Third radiating arm. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. Furthermore, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In the description of this invention, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Please see Figures 1 to 5 One embodiment of the present invention provides a parasitic coupled multi-band antenna based on IFA, comprising: a substrate 10 and an antenna structure 20.

[0024] The substrate 10 is provided with a feed point 11, an antenna ground foot 12 and a parasitic ground foot 13; the antenna structure 20 includes a connecting arm 21, a first radiating arm 22, a second radiating arm 23 and a third radiating arm 24, all of which are provided on the substrate 10. The connecting arm 21 includes a first connecting part 211 and a second connecting part 212 that are connected to each other. The first connecting part 211 is located on one side of the first radiating arm 22 and forms a first antenna gap 213 between it and the first radiating arm 22. The first connecting part 211 is connected to the feed point 11, and the second connecting part 212 is connected to the antenna ground foot 12. A second antenna gap 214 is formed between the first connecting part 211 and the second connecting part 212. The second radiating arm 23 is connected to the second connecting part 212. The third radiating arm 24 is connected to the third connecting part. The first radiating arm 22 and the feed point 11 are coupled through the first antenna gap 213. The feed point 11, the first radiating arm 22 and the parasitic ground foot 13 constitute a first antenna loop. The feed point 11, the second radiating arm 23 and the antenna ground foot 12 constitute a second antenna loop. The feed point 11, the third radiating arm 24 and the antenna ground foot 12 constitute a third antenna loop.

[0025] The working principle of an IFA-based parasitic coupled multi-band antenna according to an embodiment of the present invention is explained below: The first radiating arm 22 is coupled with the first antenna slot 213 to form the first antenna loop, which meets the high-frequency operating band. The connecting arm 21 and the second radiating arm 23, as well as the connecting arm 21 and the third radiating arm 24, form the antenna routing of the IFA, which can realize the second antenna loop and the third antenna loop, meet the low-frequency and mid-frequency operating band, and thus realize the antenna scheme of IFA plus parasitic coupling multi-frequency full coverage. It can cover more operating frequency bands without increasing the internal space occupied by the communication equipment, reduce the number of antennas and occupy less equipment space, and has a simple structure that helps save costs and improves the competitiveness of the product.

[0026] It should be noted that the bandwidth and operating frequency band of the first antenna circuit can be adjusted by adjusting the width of the first gap.

[0027] In some alternative embodiments, a first extension 221 is formed on the side of the first radiating arm 22 near the first connecting portion 211, and the parasitic foot 13 is connected to the first extension 221, thereby forming the required antenna routing form and meeting the antenna design requirements.

[0028] In some optional embodiments, the first connecting portion 211 and the second connecting portion 212 are arranged sequentially along a preset direction, and the first radiating arm 22 extends in the opposite direction of the preset direction. The arrangement of the first connecting portion 211 and the second connecting portion 212 in the preset direction and the extension of the first radiating arm 22 in the preset direction are conducive to reducing the width of the overall antenna in the preset direction, which is more conducive to meeting the structural layout requirements in the communication equipment.

[0029] In some optional embodiments, the first connecting portion 211 and the second connecting portion 212 are arranged sequentially along a predetermined direction, and the second radiating arm 23 and the third radiating arm 24 extend in the predetermined direction. The arrangement of the first connecting portion 211 and the second connecting portion 212 in the predetermined direction, and the extension of the second radiating arm 23 and the third radiating arm 24 in the predetermined direction, helps to reduce the overall width of the antenna in the predetermined direction, thus better meeting the structural layout requirements within the communication equipment. In this embodiment, the extension directions of the second radiating arm 23 and the third radiating arm 24 are opposite to the extension direction of the first radiating arm 22, thereby avoiding mutual interference.

[0030] In some optional embodiments, a clearance space 14 is provided on the substrate 10. The clearance space 14 is located on the side of the second connection portion 212 away from the antenna foot 12, and the second radiating arm 23 extends around the clearance space 14. The clearance space 14 allows the structure of the communication device to pass through, which satisfies the structural clearance design and also provides a certain positioning effect for the substrate 10. In this embodiment, the second radiating arm 23 bypasses one side of the clearance space 14 and then extends in a predetermined direction along the edge of the clearance space 14.

[0031] In some alternative embodiments, a second extension 215 is formed on the side of the second connection portion 212 away from the third radiating arm 24. The second extension 215 extends away from the third radiating arm 24, thereby facilitating the formation of the wiring structure of the IFA antenna.

[0032] The operating frequency band corresponding to the first antenna loop can be designed according to actual needs. For example, in some optional implementations, the operating frequency band corresponding to the first antenna loop is 2.3-2.6GHz.

[0033] The operating frequency band corresponding to the second antenna loop can be designed according to actual needs. For example, in some optional implementations, the operating frequency band corresponding to the second antenna loop is 1.7-2.1GHz.

[0034] The operating frequency band corresponding to the third antenna loop can be designed according to actual needs. For example, in some optional implementations, the operating frequency band corresponding to the third antenna loop is 0.8-0.9 GHz.

[0035] In this embodiment, the maximum length of the antenna structure 20 is 107.78.64 mm and the maximum width is 23.37 mm.

[0036] The aforementioned parasitic coupling multi-band antenna based on IFA can be applied to communication devices, such as mobile phones. The communication device includes a housing and the aforementioned parasitic coupling multi-band antenna based on IFA, with the substrate 10 disposed inside the housing.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A parasitic coupled multi-band antenna based on IFA, characterized in that, include: Substrate and antenna structure; The substrate is provided with a feed point, an antenna ground foot, and a parasitic ground foot; The antenna structure includes a connecting arm, a first radiating arm, a second radiating arm, and a third radiating arm, all of which are disposed on the substrate. The connecting arm includes a first connecting part and a second connecting part that are connected to each other. The first connecting part is located on one side of the first radiating arm and forms a first antenna gap with the first radiating arm. The first connecting part is connected to the feed point, and the second connecting part is connected to the antenna ground foot. A second antenna gap is formed between the first connecting part and the second connecting part. The second radiating arm is connected to the second connecting part; The third radiating arm is connected to the third connecting part; The first radiating arm and the feed point are coupled through the first antenna slot, and the feed point, the first radiating arm and the parasitic ground foot constitute the first antenna loop; The feed point, the second radiating arm, and the antenna ground pin constitute the second antenna loop; The feed point, the third radiating arm, and the antenna ground foot constitute the third antenna loop.

2. The parasitic coupled multi-band antenna based on IFA according to claim 1, characterized in that: The first radial arm has a first extension on the side near the first connecting portion, and the parasitic foot is connected to the first extension.

3. The parasitic coupled multi-band antenna based on IFA according to claim 1, characterized in that: The first connecting part and the second connecting part are arranged sequentially along a preset direction, and the first radiating arm extends in the opposite direction to the preset direction.

4. The parasitic coupled multi-band antenna based on IFA according to claim 1, characterized in that: The first connecting part and the second connecting part are arranged sequentially along a preset direction, and the second radiating arm and the third radiating arm extend toward the preset direction.

5. The parasitic coupled multi-band antenna based on IFA according to claim 1, characterized in that: An clearance space is provided on the substrate, the clearance space is located on the side of the second connection portion away from the antenna foot, and the second radiating arm extends around the clearance space.

6. The parasitic coupled multi-band antenna based on IFA according to claim 1, characterized in that: A second extension is formed on the side of the second connecting portion away from the third radiating arm, and the second extension extends away from the third radiating arm.

7. A parasitic coupled multi-band antenna based on IFA according to any one of claims 1 to 6, characterized in that: The operating frequency band corresponding to the first antenna circuit is 2.3-2.6GHz.

8. A parasitic coupled multi-band antenna based on IFA according to any one of claims 1 to 6, characterized in that: The operating frequency band corresponding to the second antenna circuit is 1.7-2.1GHz.

9. A parasitic coupled multi-band antenna based on IFA according to any one of claims 1 to 6, characterized in that: The operating frequency band corresponding to the third antenna circuit is 0.8-0.9GHz.

10. A communication device, characterized in that, include: The housing and the parasitic coupled multi-band antenna based on IFA as described in any one of claims 1 to 9, wherein the substrate is disposed within the housing.

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