Antenna assembly and communication terminal

Abstract

The antenna assembly and the communication terminal are characterized in that the layout area is arranged at the edge of the base frame, and the radiation pattern and the parasitic branch are arranged on the layout area. Thus, on one hand, when the communication terminal is assembled, the connection of the feed point and the ground point of the antenna assembly can be observed, and the assembly efficiency of the communication terminal is improved. On the other hand, the parasitic branch is arranged near the second branch, so that the high-frequency bandwidth of the antenna is larger. On the other hand, by configuring the shapes of the first gap, the second gap and the parasitic branch, the resonant frequency of the antenna can be directly adjusted, and the adaptability of the antenna to different application occasions is improved.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to an antenna assembly and a communication terminal. Background Technology

[0002] With the continuous development of communication technology, the requirements for information transmission between different communication terminals are becoming increasingly stringent. For example, with the increasing maturity of 5G communication, communication terminals need to be able to transmit information across more frequency bands. This necessitates that the antennas on the communication terminals have stronger transmission and reception capabilities for electromagnetic signals. How to enable antennas to have multiple resonant frequencies while simultaneously increasing antenna bandwidth has become a problem that needs to be solved. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide an antenna assembly and a communication terminal, which utilizes a parasitic branch disposed at the second branch to increase the bandwidth of the antenna resonant frequency and improve the communication performance of the antenna.

[0004] According to a first aspect of the present invention, an antenna assembly is provided comprising:

[0005] The base frame includes the deployment area, which is located at the edge of the base frame;

[0006] A radial pattern is laid out in the laying area and includes a first branch, a second branch, and a third branch opposite to the first and second branches. A feed point is provided between the first and second branches, and a first gap is formed between the third branch and the first branch and between the third branch and part of the second branch.

[0007] The parasitic branch has a grounding point, and the parasitic branch is placed in the placement area and forms a second gap with the second branch.

[0008] Furthermore, the end of the second branch furthest from the first branch is electrically connected to the third branch;

[0009] The third branch and the first branch extend simultaneously along the edge of the deployment area;

[0010] The parasitic branch is located on the side of the second branch that is far from the third branch.

[0011] Furthermore, the deployment area has edges, and the third branch covers the edges;

[0012] The parasitic branches extend perpendicularly to the edge.

[0013] Furthermore, the second branch also includes a recessed area, which is located on the side of the second branch away from the third branch;

[0014] The parasitic branch is at least partially located within the recessed area and forms a second slit.

[0015] Furthermore, the second branch includes an extension segment and a bend segment connected in sequence, the extension segment and the bend segment surrounding the recessed area.

[0016] Furthermore, the extension section includes a first rectangular pattern and a second rectangular pattern, which are arranged sequentially by the feed points;

[0017] The second rectangular pattern includes a first side and a second side, the first side being aligned with the side of the first rectangular pattern that forms the first gap, and the second side forming a recessed area with the first rectangular pattern.

[0018] Furthermore, the bent segment includes a third rectangular pattern, which includes a third side that is adjacent to and perpendicular to the second side;

[0019] The parasitic branch includes a fourth rectangular pattern;

[0020] The second gap has the same width in each corresponding part between the fourth rectangular pattern and the first rectangular pattern, and between the second rectangular pattern and the third rectangular pattern.

[0021] Furthermore, the bent segment includes a fourth side, and the angle between the fourth side and the second side is an obtuse angle.

[0022] The parasitic branch includes a fourth rectangular pattern;

[0023] The second gap has the same width in each corresponding part between the fourth rectangular pattern and the first rectangular pattern, and between the fourth rectangular pattern and the second rectangular pattern.

[0024] Furthermore, the first gap includes a first part and a second part, the first part corresponding to the partially bent segment and consistent with the bending direction of the bent segment.

[0025] Furthermore, the parasitic branch has a first arc edge;

[0026] The second internode has a second arc edge, and at least a partial second gap is formed between the first arc edge and the second arc edge.

[0027] Furthermore, the deployment area has a first surface, a second surface, a first through hole, and a second through hole. The first surface and the second surface are opposite to each other, and the first through hole and the second through hole are simultaneously connected to the first surface and the second surface.

[0028] Radiation patterns and parasitic branches are set on the first surface, and the feed point and grounding point correspond to the first through hole and the second through hole, respectively.

[0029] Furthermore, the antenna assembly also includes:

[0030] The first connecting pattern and the second connecting pattern are located on the second surface. The first connecting pattern is connected to the radial pattern through the first through hole, and the second connecting pattern is connected to the parasitic branch through the second through hole.

[0031] Furthermore, the second surface includes a connecting surface, which is located at the edge of the deployment area and perpendicular to the thickness direction of the deployment area;

[0032] The first connecting pattern and the second connecting pattern extend to the connecting surface simultaneously.

[0033] Furthermore, the inner wall of the first through hole includes a first conical surface, which widens towards the first surface;

[0034] The parasitic branch has a first arc edge, which is located on the first conical surface and forms a partial second slit with the second branch;

[0035] The first arc edge has both a first bending direction and a second bending direction. The first bending direction is along the circumference of the first conical surface, and the second bending direction bends toward the second surface.

[0036] Furthermore, the lengths of both the first and second stubs are 0.23-0.27λ1, where λ1 is the operating wavelength of the antenna assembly.

[0037] Furthermore, the length of the first stub is negatively correlated with the operating frequency of the antenna assembly in the high-frequency band;

[0038] The length of the second stub is negatively correlated with the low-frequency operating frequency of the antenna assembly;

[0039] The length of the third stub is negatively correlated with the low-frequency operating frequency of the antenna assembly;

[0040] The length of the parasitic stub is negatively correlated with the bandwidth and operating frequency of the antenna assembly in the high-frequency band.

[0041] The width of the first slot is positively correlated with the operating frequency of the antenna assembly.

[0042] Secondly, embodiments of the present invention also provide a communication terminal comprising:

[0043] The base frame includes the deployment area, which is located at the edge of the base frame;

[0044] A radial pattern is laid out in the laying area and includes a first branch, a second branch, and a third branch opposite to the first and second branches. A feed point is provided between the first and second branches, and a first gap is formed between the third branch and the first branch and between the third branch and part of the second branch.

[0045] The parasitic branch has a grounding point, and the parasitic branch is placed in the placement area and forms a second gap with the second branch.

[0046] Furthermore, the deployment area has a first surface, a second surface, a first through hole, and a second through hole. The first surface and the second surface are opposite to each other, and the first through hole and the second through hole are simultaneously connected to the first surface and the second surface.

[0047] Radiation patterns and parasitic branches are set on the first surface, and the feed point and grounding point correspond to the first through hole and the second through hole, respectively;

[0048] The communication terminal also includes:

[0049] The circuit board is placed on the opposite side of the second side;

[0050] The first connecting pattern and the second connecting pattern are both located on the second surface. The first connecting pattern is connected to the radial pattern through the first through hole, and the second connecting pattern is connected to the parasitic branch through the second through hole.

[0051] Two elastic connectors are mounted on the circuit board, and the contacts of the two elastic connectors abut against the first connection pattern and the second connection pattern, respectively.

[0052] Furthermore, the layout area includes multiple reserved through holes, which are arranged at intervals along the edge of the layout area, and some of the reserved through holes form the first through hole and the second through hole.

[0053] Furthermore, the communication terminal also includes:

[0054] The display screen is positioned on the side of the circuit board away from the base and is electrically connected to the circuit board; and

[0055] The housing includes a display screen, circuit board, and base frame, and includes a front and a back, with the second side facing the back.

[0056] The antenna assembly and communication terminal of this invention have their deployment area located at the edge of the base frame, and the radiation pattern and parasitic stubs are also deployed on this area. This improves assembly efficiency by facilitating observation of the connection between the antenna assembly's feed point and ground point during communication terminal assembly. Furthermore, the presence of parasitic stubs near the second stub results in a wider bandwidth for the antenna at higher frequencies. Additionally, the resonant frequency of the antenna can be directly adjusted by configuring the shapes of the first and second slots and the parasitic stubs, enhancing the antenna's adaptability to various applications. Attached Figure Description

[0057] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0058] Figure 1 This is a schematic diagram of the antenna assembly in some embodiments of the present invention;

[0059] Figure 2 This is a schematic diagram of the antenna assembly of this invention in other embodiments;

[0060] Figure 3 This is an exploded view of the antenna assembly in some embodiments of the present invention;

[0061] Figure 4 This is an exploded view of the antenna assembly in some other embodiments of the present invention;

[0062] Figure 5 These are schematic diagrams of the radiation patterns and parasitic branches in some embodiments of the present invention;

[0063] Figure 6 This is a schematic diagram of the radial pattern and parasitic branches in some other embodiments of the present invention;

[0064] Figure 7 This is a schematic diagram of the structure of the radial pattern and parasitic branches in some other embodiments of the present invention;

[0065] Figure 8 This is a schematic diagram of the structure of the radiation pattern and parasitic branches in some embodiments of the present invention;

[0066] Figure 9 This is a schematic diagram of the structure of the radiation pattern and parasitic branches in some embodiments of the present invention;

[0067] Figure 10 This is a schematic diagram of the structure of the radiation pattern and parasitic branches in some embodiments of the present invention;

[0068] Figure 11 This is a schematic diagram of the structure of the radiation pattern and parasitic branches in some embodiments of the present invention;

[0069] Figure 12 This is a schematic diagram of the structure of the radiation pattern in some embodiments of the present invention;

[0070] Figure 13 This is a schematic diagram of the structure of the radiation pattern in some other embodiments of the present invention;

[0071] Figure 14 This is a schematic diagram of the structure of the elastic connector according to an embodiment of the present invention;

[0072] Figure 15 This is a return loss test diagram of the antenna assembly according to an embodiment of the present invention;

[0073] Figure 16 This is a Smith simulation test diagram of the antenna assembly according to an embodiment of the present invention.

[0074] Explanation of reference numerals in the attached figures:

[0075] 1-Radiating pattern;

[0076] 11 - First branch;

[0077] 12 - Second branch;

[0078] 121 - Depressed area;

[0079] 122 - Extension segment; 1221 - First rectangular pattern; 1222 - Second rectangular pattern; 1223 - First side; 1224 - Second side; 1225 - Second arc edge;

[0080] 123-bending section;

[0081] 1231 - Third rectangular pattern; 1232 - Third side; 1233 - Fourth side;

[0082] 13 - Third branch;

[0083] 14-Feed point;

[0084] 15 - Opening; 16 - Band-shaped area;

[0085] 2- Parasitic nodes;

[0086] 21-Grounding point; 22-Fourth rectangular pattern; 23-First arc edge;

[0087] 3-Base frame;

[0088] 31-Layout area; 311-Edge; 312-First surface; 313-Second surface; 3131-Connecting surface;

[0089] 314 - First through hole; 3141 - First conical surface; 315 - Second through hole; 316 - Reserved through hole;

[0090] 41-First gap; 411-First section; 412-Second section;

[0091] 42 - Second gap;

[0092] 51 - First connecting pattern; 52 - Second connecting pattern; 53 - Third connecting pattern;

[0093] 6-Circuit board;

[0094] 7- Flexible connector;

[0095] 8- Display screen. Detailed Implementation

[0096] The present invention is described below based on embodiments, but the invention is not limited to these embodiments. In the detailed description of the invention below, certain specific details are described in detail. Those skilled in the art will fully understand the invention even without these details. To avoid obscuring the essence of the invention, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0097] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0098] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0099] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0100] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0101] The operating frequency, or resonant frequency, of an antenna is closely related to its shape. For a dipole antenna, the length of a single dipole is approximately one-quarter of the operating frequency. For a slot antenna, the length of the slot formed on the metal pattern is approximately half the operating frequency. Therefore, once the slot structure is fixed, the operating frequency of the slot antenna is also relatively fixed.

[0102] Figure 1-2 This is a schematic diagram of the antenna assembly in different directions according to an embodiment of the invention. The antenna assembly in the figure is roughly square plate structure, and the deployment area is located at the top corner of the square plate structure.

[0103] Figure 3-4 These are exploded diagrams of different types of antenna assemblies. In both diagrams, the radiating patterns and parasitic branches point outwards from the antenna assembly.

[0104] Figure 5-11 These are different structural forms of radial patterns and parasitic branches. Figure 5-7The dashed boxes shown represent the approximate positions and shapes of the first branch 11, the second branch 12, and the third branch 13, respectively, to facilitate the description of the length and shape of each part. Figure 9 and Figure 10 The thick solid lines represent the metal patterns laid out on the base frame. Figure 9 The image below shows the state before the radial pattern 1 is laid out on the base frame 3.

[0105] Figure 12-13 These are two different forms of radiation patterns. Among them, Figure 12 The radial pattern in Figure 5 The structure corresponds to this. Figure 13 The radiation pattern and Figure 7 The structure corresponds to this.

[0106] In some implementations, such as Figure 1-13 As shown, the antenna assembly of this embodiment includes a base frame 3, a radiating pattern 1, and a parasitic stub 2. The base frame 3 includes a deployment area 31 located at the edge of the base frame 3. The radiating pattern 1 is deployed in the deployment area 31 and includes a first stub 11, a second stub 12, and a third stub 13 opposite to the first stub 11 and the second stub 12. A feed point 14 is provided between the first stub 11 and the second stub 12. A first gap 41 is formed between the third stub 13 and the first stub 11, and between the third stub 13 and a portion of the second stub 12. The parasitic stub 2 has a grounding point 21 and is deployed in the deployment area, forming a second gap 42 with the second stub 12.

[0107] In some implementations, such as Figure 1-13 As shown, the lengths of the first stub 11 and the second stub 12 are both 0.23-0.27λ1, where λ1 is the operating wavelength of the antenna assembly. Specifically, the lengths of the first stub 11 and the second stub 12 are both one-quarter of the operating wavelength.

[0108] It is easy to understand that, firstly, the first slot 41 is located approximately in the middle of the radiation pattern 1, which cuts the waveguide (i.e., the radiation pattern 1). The current from this cut can excite the first slot 41, thereby causing the waveguide to radiate electromagnetic signals outward through the first slot 41. Secondly, the slot can be equivalent to a pair of dipoles of the same length as the slot. The resonant frequency of the dipole antenna is related to the length of the dipole arm (a quarter wavelength). Under this premise, the first slot 41 in this embodiment can be equivalent to two parts. One part can be equivalent to a first stub 11 and a portion of the third stub 13, the length of which is a quarter wavelength. The other part consists of a portion of the second stub 12 and the remaining portion of the third stub 13, the length of which is less than a quarter wavelength. This allows the antenna assembly of this embodiment to excite electromagnetic signals of different frequencies using the same first slot 41. In other words, this embodiment can be equivalent to utilizing two pairs of vibrating arms composed of the first stub 11 and part of the third stub 13, and part of the second stub 12 and the remaining third stub 13, which are respectively excited by electromagnetic signals of corresponding frequencies. Furthermore, this embodiment forms a second gap 42 between the parasitic stub 2 and the second stub 12 to couple the parasitic stub 2 with the radiation pattern 1, thereby improving the bandwidth of the antenna.

[0109] In this embodiment of the antenna assembly, the deployment area 31 is located at the edge of the base frame 3, and the radiation pattern 1 and the parasitic stub 2 are deployed together on the deployment area 31. Therefore, on the one hand, during the assembly of the communication terminal, it is easier to observe the connection between the feed point 14 and the ground point 21 of the antenna assembly, improving the assembly efficiency of the communication terminal. On the other hand, the parasitic stub 2 is placed near the second stub 12, resulting in a larger bandwidth for the antenna in the high-frequency region. Furthermore, by configuring the shapes of the first slot 41, the second slot 42, and the parasitic stub 2, the resonant frequency of the antenna can be directly adjusted, improving the antenna's adaptability to different applications.

[0110] Optionally, the base frame 3 or the deployment area 31 in this embodiment can be configured as a thermoplastic polymer containing laser powder. A three-dimensional circuit pattern is directly engraved on the base frame using a laser direct forming process, and then electroplated to form a three-dimensional metal circuit, thereby giving the base frame 3 certain electrical properties. In this embodiment, the material of the base frame 3 can be selected from materials such as nylon or plastic containing laser powder. The specific shape of the base frame can be configured according to the shape of the communication terminal composed of the antenna assembly of this embodiment, such as a circular or rectangular form.

[0111] In other embodiments, the antenna assembly in the above embodiments can be fabricated using an FPC (Flexible Printed Circuit). FPC, or Flexible Printed Circuit, is commonly manufactured using processes including dry film lamination, circuit exposure and forming, circuit development, circuit etching, and dry film removal. The radiating pattern 1 and parasitic branches 2 in the above embodiments can be formed on the substrate of the flexible printed circuit board using the aforementioned processes.

[0112] In some implementations, such as Figure 1-13 As shown, the length of the first stub 11 is negatively correlated with the high-frequency operating frequency of the antenna assembly. The length of the second stub 12 is negatively correlated with the low-frequency operating frequency of the antenna assembly. The length of the third stub 13 is negatively correlated with the low-frequency operating frequency of the antenna assembly. The length of the parasitic stub 2 is negatively correlated with the bandwidth operating frequency of the high-frequency band of the antenna assembly. The width of the first slot 41 is positively correlated with the operating frequency of the antenna assembly.

[0113] It's easy to understand that 5G communication operates in two main frequency bands: one above 24GHz and the other below 6GHz. Higher frequencies achieve higher transmission rates. However, this also significantly reduces transmission distance and coverage. Therefore, currently used frequency bands are primarily below 6GHz. Specifically, in 5G frequency bands, N78 refers to 3.3-3.8GHz, and N79 refers to 4.4-5.0GHz.

[0114] In this embodiment, the high-frequency band refers to N79, and the low-frequency band refers to N78. Those skilled in the art can adjust the operating frequency of the antenna assembly based on the radiation pattern 1 and the form of the first slot 41 in this embodiment. For example, to reduce the operating frequency of the antenna assembly in the high-frequency band, the length of the first stub 11 can be increased. To increase the operating frequency of the antenna assembly in the low-frequency band, the length of the second stub 12 can be decreased. To increase the overall operating frequency of the antenna assembly, the width of the first slot 41 can be directly increased. Therefore, the antenna assembly in this embodiment can better meet the requirements of dual-band 5G communication.

[0115] In some implementations, such as Figure 1-13 As shown, the end of the second branch 12 furthest from the first branch 11 is electrically connected to the third branch 13. The third branch 13 and the first branch 11 extend simultaneously along the edge of the distribution area 31. The parasitic branch 2 is located on the side of the second branch 12 furthest from the third branch 13.

[0116] Specifically, in this embodiment, the second branch 12 and the third branch 13 are connected by the strip region 16, enabling the second branch 12 and the third branch 13 to transmit electromagnetic signals. Conversely, the first branch 11 and the third branch 13 form an opening 15 at their extension ends, which allows the first gap 41 to be open. This makes it easier for those skilled in the art to adjust the lengths of the first branch 11, the third branch 13, and the first gap 41. Figure 12 and 13 The image shows two forms of the end of the third branch 13. Figure 13 Compared to the third branch 13 Figure 12 The longer end of the antenna further reduces the operating frequency in the low-frequency band. This satisfies the antenna assembly's requirements for different operating frequencies and improves the product's adaptability to various application scenarios.

[0117] In some implementations, such as Figure 1-13 As shown, the arrangement area 31 has a side edge 311, and the third branch 13 covers the side edge 311. The extension direction of the parasitic branch 2 is perpendicular to the side edge 311. Figure 8 and Figure 9 The image shows two forms of edges. Among them, Figure 9 The edge 311 has a rounded transition. The length of the parasitic stub 2 and the length of the second slot 42 directly affect the operating frequency of the antenna assembly. However, when the structure of the deployment area 31 is relatively compact, it becomes more difficult to free up more space to arrange the parasitic stub 2. In this embodiment, the radiation pattern 1 is moved as far as possible towards the edge of the deployment area 31, and the third stub 13 is deployed on the side of the deployment area 31, thereby making full use of the deployment area 31 in three-dimensional space to meet the antenna's space requirements.

[0118] In some implementations, such as Figure 1-13 As shown, the second stub 12 also includes a recessed region 121 located on the side of the second stub 12 away from the third stub 13. Simultaneously, the parasitic stub 2 is at least partially located within the recessed region 121, forming a second slot 42. The recessed region 121 allows the second stub 12 to coil laterally around the parasitic stub 2, increasing the coupling between them. This results in the antenna's test curve shifting towards lower frequencies more quickly. Consequently, the radiation pattern 1 has a smaller area, leading to lower antenna assembly costs and a more compact design.

[0119] Specifically, grounding point 21 is located within the recessed area 121. The distance from grounding point 21 to the edge 311 is the same as that from the feed point 14. In this embodiment, grounding point 21 is closer to the side of the arrangement area 31, making it easier to ground the parasitic branch 2.

[0120] In some implementations, such as Figure 1-13As shown, the second branch 12 includes an extension segment 122 and a bent segment 123 connected in sequence, with the extension segment 122 and the bent segment 123 surrounding the recessed region 121. In this embodiment, the recessed region 121 composed of the extension segment 122 and the bent segment 123 allows the parasitic branch 2 to be closer to the edge of the arrangement area 31, and the coupling strength between the parasitic branch 2 and the radial pattern 1 can be changed by further configuring the bending angle and length of the bent segment 123.

[0121] Further, the extension 122 includes a first rectangular pattern 1221 and a second rectangular pattern 1222, which are arranged sequentially by the feed point 14. The second rectangular pattern 1222 includes a first side 1223 and a second side 1224 opposite to each other. The first side 1223 is aligned with the side of the first rectangular pattern 1221 that forms the first gap 41, and the second side 1224 forms a recessed region 121 with the first rectangular pattern 1221. In this embodiment, the sides of the first rectangular pattern 1221 and the second rectangular pattern 1222 facing the first gap 41 are on the same straight line, and the side of the second rectangular pattern 1222 away from the first gap 41 is offset from the side of the first rectangular pattern 1221 away from the first gap 41. That is, the first rectangular pattern 1221 is narrower than the second rectangular pattern 1222. Thus, the recessed area 121 formed between the first rectangular pattern 1221 and the second rectangular pattern 1222 presents a square recess, which has a clearer boundary, making it easier for those skilled in the art to control the length and width of the second gap 42.

[0122] In some implementations, such as Figure 1-13 As shown, the bent segment 123 includes a third rectangular pattern 1231, which includes a third side 1232. The third side 1232 is adjacent to and perpendicular to the second side 1224. Under this premise, the parasitic branch 2 includes a fourth rectangular pattern 22. The second gap 42 has the same width in each corresponding part between the fourth rectangular pattern 22 and the first rectangular pattern 1221, and between the second rectangular pattern 1222 and the third rectangular pattern 1231.

[0123] In this embodiment, the bent segment 123 and the parasitic branch are further configured to ensure that the second branch 12 has sufficient length without occupying more arrangement space. On the other hand, this makes the formed second gap 42 present as three sequentially perpendicular parts. Figure 7 The figure illustrates the specific form of the second gap 42. The upper part of the second gap 42 extends horizontally, the middle part extends vertically, and the bottom extends horizontally. Except for the vertical connection points between each part, the width of the other parts remains relatively consistent, reducing the design difficulty for those skilled in the art.

[0124] In other implementations, such as Figure 1-13 As shown, the bent segment 123 includes a fourth side 1233, and the angle between the fourth side 1233 and the second side 1224 is an obtuse angle. The parasitic branch 2 includes a fourth rectangular pattern 22. The second gap 42 has the same width in each corresponding part between the fourth rectangular pattern 22 and the first rectangular pattern 1221, and between the fourth rectangular pattern 22 and the second rectangular pattern 1222. Figure 5 shows the specific form of the second gap 42. In the figure, the angle between the fourth side 1233 and the second side 1224 is approximately 135 degrees. Changing the tilt angle of this region allows those skilled in the art to directly adjust the parasitic resonance between the two.

[0125] In some implementations, such as Figure 1-13 As shown, the first gap 41 includes a first part 411 and a second part 412. The first part 411 corresponds to the partially bent segment 123 and is in the same bending direction as the bent segment 123. In this embodiment, the first part 411 and the second part 412 are interconnected, while ensuring that there is an included angle between them. Figure 6 and Figure 7 The image shows two forms of the second gap 42. Figure 6 The angle between the first part 411 and the second part 412 is approximately 135 degrees (the same as the bending angle of the bending segment 123). Figure 7 The angle between the first part 411 and the second part 412 is 90 degrees (which is also the same as the bending angle of the bent section 123). By configuring the angle of the first part 411, the length of the first gap 41 is made longer, ensuring that the size of the strip area 16 is not too small, so as to avoid affecting the connection between the second branch 12 and the third branch 13.

[0126] In some implementations, such as Figure 9-11 As shown, the parasitic branch 2 has a first arcuate edge 23. In contrast, the second branch 12 has a second arcuate edge 1225, and at least a partial second gap 42 is formed between the first arcuate edge 23 and the second arcuate edge 1225. In this embodiment, the second gap 42 is partially arcuate, and with the same area, the arcuate second gap 42 can be narrower.

[0127] In some implementations, such as Figure 9-11As shown, the deployment area 31 has a first surface 312, a second surface 313, a first through-hole 314, and a second through-hole 315. The first surface 312 and the second surface 313 are opposite to each other, and the first through-hole 314 and the second through-hole 315 are simultaneously connected to the first surface 312 and the second surface 313. The radiating pattern 1 and the parasitic stub 2 are disposed on the first surface 312, and the feed point 14 and the ground point 21 correspond to the first through-hole 314 and the second through-hole 315, respectively. In this embodiment, the first through-hole 314 and the second through-hole 315 are utilized so that the antenna assembly can be electrically connected to the radiating pattern 1 and the parasitic stub 2 through the second surface 313. For example, the radiating pattern 1 and the parasitic stub 2 are placed on the side away from the excitation source to avoid short circuits between the radiating pattern 1 and the parasitic stub 2 and the components on the circuit board 6.

[0128] Furthermore, the antenna assembly also includes a first connection pattern 51 and a second connection pattern 52, which are both located on the second surface 313. The first connection pattern 51 is connected to the radiation pattern 1 through a first through hole 314, and the second connection pattern 52 is connected to the parasitic branch 2 through a second through hole 315.

[0129] Specifically, the first connecting pattern 51 and the second connecting pattern 52 are formed on the inner walls of the first through hole 314 and the second through hole 315 using the aforementioned laser direct forming process. This achieves an electrical connection between the metal pattern on the first surface 312 and the metal pattern on the second surface 313.

[0130] In some implementations, such as Figure 1-13 As shown, the second surface 313 includes a connecting surface 3131, which is located at the edge of the layout area 31 and perpendicular to the thickness direction of the layout area 31. The first connecting pattern 51 and the second connecting pattern 52 extend to the connecting surface 3131.

[0131] Specifically, the grounding point 21 is located on the side of the second branch 12 away from the first gap 41 and within the recessed area 121. The grounding point 21 and the feed point 14 are equidistant from the edge of the deployment area 31. Therefore, in this embodiment, the grounding point 21 and the feed point 14 are positioned near the edge of the deployment area 31, allowing the operator to observe these positions during antenna assembly installation to determine if the connection is correct.

[0132] In some implementations, such as Figure 1-13As shown, the inner wall of the first through hole 314 includes a first conical surface 3141, which widens towards the first surface 312. The parasitic branch 2 has a first arcuate edge 23, which is located on the first conical surface 3141 and forms a partial second gap 42 with the second branch 12. The first arcuate edge 23 has both a first bending direction and a second bending direction. The first bending direction is along the circumference of the first conical surface 3141, and the second bending direction bends towards the second surface 313. The thick solid line in Figure 11 illustrates one form of the first arcuate edge 23. Arrows A and B in the figure represent the first bending direction and the second bending direction of the first arcuate edge 23 in this embodiment, respectively.

[0133] It is easy to understand that, to facilitate the laser forming process, the inner walls of the first through hole 314 and the second through hole 315 are respectively flared outwards towards the first surface 312 and the second surface 313. That is, both the inner walls of the first through hole 314 and the second through hole 315 are provided with a first conical surface 3141. Simultaneously, to fully utilize the space at the edge of the arrangement area 31, the first arc edge 23 is set on the first conical surface 3141 (e.g., ...). Figure 9 (As shown in the image above).

[0134] Under this premise, the distance from the first arc edge 23 on the first conical surface 3141 to the second branch 12 (second arc edge 1225) will change. The position located in the middle of the first arc edge 23 will be closer to the second arc edge 1225. Therefore, in this embodiment, a second bending direction is also provided on the first arc edge 23 to keep the distance between the first arc edge 23 and the second arc edge 1225 as consistent as possible.

[0135] Specifically, third connecting patterns 53 are provided on the inner wall of the first through hole 314, on the side near the second surface 313, and at both ends of the second through hole 315. The third connecting patterns 53 are used to electrically connect the radial pattern 1 to the first connecting pattern 51 and the parasitic branch 2 to the second connecting pattern 52. Figure 9 The second slit 42 shown has a central region formed by a first arc edge 23 and a second arc edge 1225. The second slits 42 on both sides are formed by the two straight edges of the parasitic branch 2, the bent segment 123, and the third connecting pattern 53, respectively. This makes the structure of the aforementioned radial pattern and parasitic branch 2 more compact.

[0136] Optionally, to further reduce the frequency of the radiation pattern 1 in the figure, the connection area between the second branch 12 and the third branch 13 extends away from the opening, forming an extended area. To accommodate the fixed position of the base frame 3, two avoidance areas are also provided in this area. Figure 9 (As shown in Region I and Region II).

[0137] In the above embodiments, the antenna assembly can be used in a communication terminal to enable communication between the communication terminal and external devices. This communication terminal includes, but is not limited to, e-readers, mobile phones, or smartwatches.

[0138] In one alternative implementation, such as Figure 1-13 As shown, the communication terminal includes a base frame 3, a radial pattern 1, and a parasitic branch 2. The base frame 3 includes a deployment area 31 located at the edge of the base frame 3. The radial pattern 1 is deployed in the deployment area 31 and includes a first branch 11, a second branch 12, and a third branch 13 opposite to the first branch 11 and the second branch 12. A feed point 14 is provided between the first branch 11 and the second branch 12. A first gap 41 is formed between the third branch 13 and the first branch 11, and between the third branch 13 and part of the second branch 12. The parasitic branch 2 has a grounding point 21, and is deployed in the deployment area, forming a second gap 42 with the second branch 12.

[0139] In this embodiment of the communication terminal, the deployment area 31 is located at the edge of the base frame 3, and the radiation pattern 1 and the parasitic branch 2 are deployed together on the deployment area 31. This improves the assembly efficiency of the communication terminal by facilitating observation of the connection between the antenna assembly's feed point 14 and ground point 21 during assembly. Furthermore, the placement of the parasitic branch 2 near the second branch 12 increases the antenna's bandwidth in the high-frequency region. Moreover, the resonant frequency of the antenna can be directly adjusted by configuring the shapes of the first slot 41, the second slot 42, and the parasitic branch 2, thus improving the antenna's adaptability to different applications.

[0140] Figure 14 This is a schematic diagram of the structure of the elastic connector according to an embodiment of the present invention. In some embodiments, such as... Figure 1-14 As shown, the deployment area 31 has a first surface 312, a second surface 313, a first through hole 314, and a second through hole 315. The first surface 312 and the second surface 313 are opposite to each other, and the first through hole 314 and the second through hole 315 are simultaneously connected to the first surface 312 and the second surface 313. A radiating pattern 1 and a parasitic branch 2 are disposed on the first surface 312, and a feed point 14 and a grounding point 21 correspond to the first through hole 314 and the second through hole 315, respectively. The communication terminal also includes a circuit board 6, a first connecting pattern 51, and a second connecting pattern 52. The circuit board 6 is placed on the opposite side of the second surface 313, and the first connecting pattern 51 and the second connecting pattern 52 are simultaneously located on the second surface 313. The first connecting pattern 51 is connected to the radiating pattern 1 through the first through hole 314, and the second connecting pattern 52 is connected to the parasitic branch 2 through the second through hole 315. Two elastic connectors 7 are mounted on the circuit board 6, and the contacts of the two elastic connectors 7 abut against the first connecting pattern 51 and the second connecting pattern 52, respectively.

[0141] In this embodiment, the bottom of the elastic connector 7 is mounted on the circuit board 6, and the top is the contact point of the elastic connector 7, which moves downward when pressed. By abutting the elastic connector 7 against the antenna assembly, the radiation pattern 1 and the parasitic branch 2 can be electrically connected to the circuit board 6 when the antenna assembly is mounted on one side of the circuit board 6, which facilitates the installation and operation of the communication terminal.

[0142] In some implementations, such as Figure 1-13 As shown, the layout area 31 includes a plurality of reserved through holes 316, which are arranged at intervals along the edge of the layout area 31, and some of the reserved through holes 316 form a first through hole 314 and a second through hole 315.

[0143] When the antenna assembly of this embodiment receives and transmits different types of electromagnetic signals, the corresponding radiation pattern 1 will also change. By reserving multiple reserved through holes 316 in the deployment area 31, the lengths of the first branch 11 and the second branch 12, as well as the coupling position of the parasitic branch 2, can be adjusted according to actual needs. Figure 9 The figure illustrates one form of the reserved through-hole 316, including three reserved through-holes 316 arranged at intervals. The reserved through-holes 316 located in the upper left and middle positions are used to form the first through-hole 314 and the second through-hole 315, respectively, while the reserved through-hole 316 in the lower right position is not used. When those skilled in the art need to significantly increase the frequency of the first branch 11, the reserved through-hole 316 in the lower right position can be used to connect to the first branch, thereby reducing the length of the first branch 11.

[0144] In some implementations, such as Figure 1-13 As shown, the communication terminal also includes a display screen 8 and a housing (not shown). The display screen 8 is positioned on the side of the circuit board 6 opposite to the base frame 3 and is electrically connected to the circuit board 6. The housing is used to house the display screen 8, the circuit board 6, and the base frame 3, and includes a front and a back side, with the second side 313 facing the back side. Installing the display screen 8, the circuit board 6, and the base frame 3 sequentially within the housing simplifies the installation process. Simultaneously, the radial pattern 1 and parasitic branches 2 opposite to the circuit board 6 prevent short circuits with internal components.

[0145] Figure 15 This is a test graph of the return loss of the antenna assembly according to an embodiment of the present invention. The smaller the value on the vertical axis, the lower the return loss of the antenna. The frequency bands with return losses below -5dB in the graph are approximately 3.3GHz and 4.5-5.5GHz. That is, the antenna assembly of this embodiment can meet the requirements of the N78 and N79 frequency bands in 5G communication.

[0146] Figure 16This is a Smith simulation test diagram of the antenna assembly according to an embodiment of the present invention. In the diagram, the N78 and N79 frequency bands are concentrated at the center of the Smith chart, therefore, the antenna assembly has a good impedance matching design.

[0147] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of protection of the present invention.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: The base frame (3) includes a layout area (31) located at the edge of the base frame (3); A radial pattern (1) is arranged in the arrangement area (31) and includes a first branch (11), a second branch (12) and a third branch (13) opposite to the first branch (11) and the second branch (12). A feed point (14) is provided between the first branch (11) and the second branch (12). A first gap (41) is formed between the third branch (13) and the first branch (11) and between the third branch (13) and part of the second branch (12). The parasitic branch (2) has a grounding point (21), and the parasitic branch (2) is arranged in the arrangement area and forms a second gap (42) with the second branch (12); The layout area (31) has an edge (311), and the third branch (13) covers the edge (311); The parasitic branch (2) extends perpendicularly to the edge (311).

2. The antenna assembly according to claim 1, characterized in that, The end of the second branch (12) away from the first branch (11) is electrically connected to the third branch (13); The third branch (13) and the first branch (11) extend simultaneously along the edge of the layout area (31); The parasitic branch (2) is located on the side of the second branch (12) away from the third branch (13).

3. The antenna assembly according to claim 1, characterized in that, The second branch (12) also includes a recessed region (121) located on the side of the second branch (12) away from the third branch (13); The parasitic branch (2) is at least partially located within the recessed area (121) and forms the second slit (42).

4. The antenna assembly according to claim 3, characterized in that, The second branch (12) includes an extension segment (122) and a bend segment (123) connected in sequence, the extension segment (122) and the bend segment (123) surrounding the recessed region (121).

5. The antenna assembly according to claim 4, characterized in that, The extension section (122) includes a first rectangular pattern (1221) and a second rectangular pattern (1222), the first rectangular pattern (1221) and the second rectangular pattern (1222) being arranged sequentially by the feed point (14); The second rectangular pattern (1222) includes a first side (1223) and a second side (1224) opposite each other. The first side (1223) is aligned with the side of the first rectangular pattern (1221) that forms the first gap (41), and the second side (1224) forms the recessed area (121) with the first rectangular pattern (1221).

6. The antenna assembly according to claim 5, characterized in that, The bent segment (123) includes a third rectangular pattern (1231), the third rectangular pattern (1231) includes a third side (1232), the third side (1232) is adjacent to and perpendicular to the second side (1224); The parasitic branch (2) includes a fourth rectangular pattern (22); The second gap (42) has the same width in each part between the fourth rectangular pattern (22) and the first rectangular pattern (1221) and between the second rectangular pattern (1222) and the third rectangular pattern (1231).

7. The antenna assembly according to claim 5, characterized in that, The bent segment (123) includes a fourth side (1233), and the angle between the fourth side (1233) and the second side (1224) is an obtuse angle. The parasitic branch (2) includes a fourth rectangular pattern (22); The second gap (42) has the same width in each corresponding part between the fourth rectangular pattern (22) and the first rectangular pattern (1221) and between the fourth rectangular pattern (22) and the second rectangular pattern (1222).

8. The antenna assembly according to claim 4, characterized in that, The first gap (41) includes a first part (411) and a second part (412), the first part (411) corresponding to a portion of the bent segment (123) and having the same bending direction as the bent segment (123).

9. The antenna assembly according to claim 4, characterized in that, The parasitic branch (2) has a first arc edge (23); The second branch (12) has a second arc edge (1225), and at least part of the second gap (42) is formed between the first arc edge (23) and the second arc edge (1225).

10. The antenna assembly according to claim 1, characterized in that, The layout area (31) has a first surface (312), a second surface (313), a first through hole (314) and a second through hole (315). The first surface (312) and the second surface (313) are opposite to each other. The first through hole (314) and the second through hole (315) are connected to the first surface (312) and the second surface (313) at the same time. The radiation pattern (1) and the parasitic branch (2) are disposed on the first surface (312), and the power supply point (14) and the grounding point (21) correspond to the first through hole (314) and the second through hole (315) respectively.

11. The antenna assembly according to claim 10, characterized in that, The antenna assembly also includes: The first connecting pattern (51) and the second connecting pattern (52) are located on the second surface (313). The first connecting pattern (51) is connected to the radial pattern (1) through the first through hole (314), and the second connecting pattern (52) is connected to the parasitic branch (2) through the second through hole (315).

12. The antenna assembly according to claim 11, characterized in that, The second surface (313) includes a connecting surface (3131), which is located at the edge of the layout area (31) and perpendicular to the thickness direction of the layout area (31); The first connecting pattern (51) and the second connecting pattern (52) extend to the connecting surface (3131) at the same time.

13. The antenna assembly according to claim 11, characterized in that, The inner wall of the first through hole (314) includes a first conical surface (3141), which widens toward the first surface (312); The parasitic branch (2) has a first arc edge (23), which is located on the first conical surface (3141) and forms part of the second gap (42) with the second branch (12); The first arc edge (23) has a first bending direction and a second bending direction. The first bending direction is along the circumference of the first conical surface, and the second bending direction bends toward the second surface (313).

14. The antenna assembly according to any one of claims 1-13, characterized in that, The lengths of the first stub (11) and the second stub (12) are both 0.23-0.27λ1, where λ1 is the operating wavelength of the antenna assembly.

15. The antenna assembly according to any one of claims 1-13, characterized in that, The length of the first stub (11) is negatively correlated with the high-frequency operating frequency of the antenna assembly; The length of the second stub (12) is negatively correlated with the low-frequency operating frequency of the antenna assembly; The length of the third stub (13) is negatively correlated with the low-frequency operating frequency of the antenna assembly; The length of the parasitic branch (2) is negatively correlated with the bandwidth operating frequency of the high-frequency band of the antenna assembly; The width of the first gap (41) is positively correlated with the operating frequency of the antenna assembly.

16. A communication terminal, characterized in that, The communication terminal includes: The base frame (3) includes a layout area (31) located at the edge of the base frame (3); A radial pattern (1) is arranged in the arrangement area (31) and includes a first branch (11), a second branch (12) and a third branch (13) opposite to the first branch (11) and the second branch (12). A feed point (14) is provided between the first branch (11) and the second branch (12). A first gap (41) is formed between the third branch (13) and the first branch (11) and between the third branch (13) and part of the second branch (12). The parasitic branch (2) has a grounding point (21), and the parasitic branch (2) is arranged in the arrangement area and forms a second gap (42) with the second branch (12); The layout area (31) has an edge (311), and the third branch (13) covers the edge (311); The parasitic branch (2) extends perpendicularly to the edge (311).

17. The communication terminal according to claim 16, characterized in that, The layout area (31) has a first surface (312), a second surface (313), a first through hole (314) and a second through hole (315). The first surface (312) and the second surface (313) are opposite to each other. The first through hole (314) and the second through hole (315) are connected to the first surface (312) and the second surface (313) at the same time. The radiation pattern (1) and the parasitic branch (2) are disposed on the first surface (312), and the feed point (14) and the grounding point (21) correspond to the first through hole (314) and the second through hole (315) respectively; The communication terminal also includes: The circuit board (6) is placed on the opposite side of the second surface (313); The first connecting pattern (51) and the second connecting pattern (52) are located on the second surface (313). The first connecting pattern (51) is connected to the radial pattern (1) through the first through hole (314), and the second connecting pattern (52) is connected to the parasitic branch (2) through the second through hole (315). Two elastic connectors (7) are mounted on the circuit board (6), and the contacts of the two elastic connectors (7) abut against the first connection pattern (51) and the second connection pattern (52) respectively.

18. The communication terminal according to claim 17, characterized in that, The layout area (31) includes a plurality of reserved through holes (316), which are arranged at intervals along the edge of the layout area (31), and some of the reserved through holes (316) form the first through hole (314) and the second through hole (315).

19. The communication terminal according to claim 17, characterized in that, The communication terminal also includes: The display screen (8) is placed on the side of the circuit board (6) opposite to the base frame (3) and is electrically connected to the circuit board (6); and The housing includes the display screen (8), the circuit board (6) and the base frame (3) and includes a front and a back, with the second side (313) facing the back.

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