Antenna device and electronic device

Abstract

The application discloses an antenna device and an electronic device, comprising a floor, an antenna medium plate and two antenna radiation modules; the floor and the two antenna radiation modules are arranged on a first surface of the antenna medium plate, and the two antenna radiation modules are respectively located on two sides of the floor; wherein each antenna radiation module comprises a first radiator, a spacing is formed between the first radiator and the floor, and a feeding point and a grounding point are arranged on a first end of the first radiator respectively; at least one antenna radiation module further comprises a first coupling arm, the first coupling arm is arranged on a second end of the first radiator, and the first coupling arm is arranged towards the floor; the projection area of the first coupling arm in one antenna radiation module in a first direction or a second direction overlaps with the other antenna radiation module; wherein the first direction is a direction parallel to the floor, and the second direction is a direction perpendicular to the floor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to an antenna device and an electronic device. BACKGROUND

[0002] With the development of the information age, electronic devices such as mobile terminals have become an important part of human life, and space and performance are basic requirements for terminal antenna design. For example, it is necessary to design an antenna with the best performance in the smallest space. When an antenna with the best performance is designed in the smallest space, it can also meet the terminal configuration requirements for a larger battery, a larger number and type of antennas, and a larger acoustic cavity for sound quality requirements.

[0003] The traditional antenna design has the following problems: the frame or flexible printed circuit (FPC) antenna is arranged only on the long side of the frame, resulting in low space utilization. The antenna design is dense or the position of different antennas changes due to the change of the physical state of the terminal, which may cause the performance of the antenna to decrease due to the mutual coupling between different antennas. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide an antenna device and an electronic device, which can solve the problem of low space utilization of the existing antenna device and the mutual coupling between antennas causing the performance of the antenna to decrease.

[0005] In a first aspect, the embodiments of the present application provide an antenna device, comprising: a ground plate, an antenna dielectric plate, and two antenna radiation modules.

[0006] The ground plate and the two antenna radiation modules are arranged on the first surface of the antenna dielectric plate, and the two antenna radiation modules are respectively located on the two sides of the ground plate.

[0007] Each of the antenna radiation modules comprises: a first radiator, the first radiator has a spacing with the ground plate, and a feeding point and a grounding point are respectively arranged at the first end of the first radiator.

[0008] At least one of the antenna radiation modules further comprises: a first coupling arm, the first coupling arm is arranged at the second end of the first radiator, and the first coupling arm is arranged towards the ground plate; the projection area of the first coupling arm in one of the antenna radiation modules in a first direction or a second direction overlaps with the other antenna radiation module; the first direction is parallel to the ground plate, and the second direction is perpendicular to the ground plate.

[0009] In a second aspect, the embodiments of the present application provide an electronic device comprising the antenna device as described above.

[0010] In the embodiment of the present application, by setting two antenna radiation modules and arranging the two antenna radiation modules on the two sides of the floor, the space utilization of the antenna design can be improved while meeting the multi-antenna design; and at least one antenna radiation module is further provided with a first coupling arm, by the shape cooperation between the first coupling arm and the first radiator and the short circuit arm, the mutual impedance of the two antenna radiation modules can be adjusted in the hardware structure, so that the isolation between the antennas can be improved in the case of reducing the use of capacitive or inductive devices, and the antenna performance is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic diagram of an antenna device of an embodiment of the present application;

[0012] Figure 2 is a schematic diagram of an antenna radiation module of an embodiment of the present application;

[0013] Figure 3 is a schematic diagram of an antenna radiation module of an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of an antenna device of an embodiment of the present application;

[0015] Figure 5 is a top view of different angles of a symmetric array of an embodiment of the present application;

[0016] Figure 6 is a schematic diagram of S parameter simulation results of different angles of a symmetric array of an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of Z parameter simulation results of different angles of a symmetric array of an embodiment of the present application;

[0018] Figure 8 is a schematic diagram of S parameter simulation results of a traditional IFA antenna and an antenna device of an embodiment of the present application;

[0019] Figure 9 is a schematic diagram of Z parameter simulation results of a traditional IFA antenna;

[0020] Figure 10 is a schematic diagram of an antenna radiation module of an embodiment of the present application;

[0021] Figure 11 is a schematic diagram of a clearance provided between an antenna radiation module and a floor of an embodiment of the present application;

[0022] Figure 12 is a schematic diagram of a curve of the imaginary part of the mutual impedance changing with C of an embodiment of the present application;

[0023] Figure 13 is a schematic diagram of the real part of the mutual impedance of an embodiment of the present application as a function of C;

[0024] Figure 14 is a schematic diagram of the S parameter comparison results when the imaginary part of the mutual impedance is zero for an embodiment of the present application;

[0025] Figure 15 is a schematic diagram of the matching variation of an antenna when the length of the short-circuit arm is different for an embodiment of the present application;

[0026] Figure 16 is a schematic diagram of the matching variation of an antenna when the length of the short-circuit arm is different for an embodiment of the present application;

[0027] Figure 17 is a schematic diagram of the variation trend of the real part of the mutual impedance when the height of the short-circuit arm is different for an embodiment of the present application;

[0028] Figure 18 is a schematic diagram of the variation trend of the imaginary part of the mutual impedance when the height of the short-circuit arm is different for an embodiment of the present application;

[0029] Figure 19 is a schematic diagram of the simulation results of S11 and S21 of an antenna device for an embodiment of the present application;

[0030] Figure 20 is a schematic diagram of the variation curves of the mutual impedance of a traditional IFA antenna and an antenna device for an embodiment of the present application;

[0031] Figure 21 is a schematic diagram of an antenna device for an embodiment of the present application;

[0032] Figure 22 is a schematic diagram of the simulation results of two antenna radiators for an embodiment of the present application;

[0033] Figure 23 is a schematic diagram of the simulation efficiency of example 1 and example 2 for an embodiment of the present application;

[0034] Figure 24 is a schematic diagram of an antenna device for an embodiment of the present application;

[0035] Figure 25 is a schematic diagram of an antenna device for an embodiment of the present application;

[0036] Figure 26 is a schematic diagram of the simulation results of example 3 for an embodiment of the present application;

[0037] Figure 27 is a schematic diagram of an antenna device for an embodiment of the present application;

[0038] Figure 28 is a schematic diagram of the simulation results of example 4 for an embodiment of the present application;

[0039] Figure 29 Fig. 7 is a schematic view of an antenna device according to an embodiment of the present application;

[0040] Figure 30 Fig. 8 is a schematic view of an antenna device according to an embodiment of the present application;

[0041] Figure 31 Fig. 9 is a schematic view of an antenna device according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0043] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more.

[0044] As shown in Figure 1 The present embodiment provides an antenna device, comprising a floor 1, an antenna dielectric plate 2 and two antenna radiation modules 3.

[0045] The floor 1 and the two antenna radiation modules 3 are arranged on the first surface of the antenna dielectric plate 2, and the two antenna radiation modules 3 are respectively located on the two sides of the floor 1.

[0046] Each of the antenna radiation modules 3 comprises a first radiator 31, wherein the first radiator 31 has a spacing with the floor 1, and a feeding point and a grounding point are respectively arranged at the first end of the first radiator 31.

[0047] At least one of the antenna radiation modules further comprises a first coupling arm 32, wherein the first coupling arm 32 is arranged at the second end of the first radiator 31, and the first coupling arm 32 is arranged towards the floor 1; the projection area of the first coupling arm 32 in one of the antenna radiation modules in a first direction or a second direction overlaps with the other antenna radiation module; wherein the first direction is parallel to the floor 1, and the second direction is perpendicular to the floor 1.

[0048] Optionally, the antenna dielectric plate 2 is arranged on the side of the floor 1, i.e. the side of the floor 1 is connected with the first surface of the antenna dielectric plate 2, such as the antenna dielectric plate 2 can be arranged vertically with the floor 1. Both of the antenna radiation modules 3 are arranged on the first surface, and one of the antenna radiation modules 3 is arranged on the first side of the floor 1, and the other antenna radiation module 3 is arranged on the second side of the floor 1, and the first side and the second side are two opposite sides on the floor 1.

[0049] For example, the first direction can be understood as parallel to one side of the second surface of the floor 1, and the second direction can be understood as perpendicular to one side of the second surface of the floor 1. Wherein, the second surface is a surface on the floor 1 located on the second side.

[0050] In one embodiment where the projection area of the first coupling arm 32 in the first direction or the second direction overlaps with the other antenna radiation module, the first coupling arm 32 is projected along the first direction or the second direction, and the projection area falls on the other antenna radiation module.

[0051] Referring to Figure 1 The position A' of the antenna radiation module 3 located below the floor 1 is a feed point corresponding to the position A on the floor, which is used to connect the feed source; the position B' of the antenna radiation module 3 located below the floor 1 is a feed point corresponding to the position B on the floor, which is used to connect the feed source; and the position D' of the antenna radiation module 3 is a grounding point corresponding to the position D on the floor, which is used to ground. Optionally, the positions of the feed points (i.e. positions A' and B') and the grounding point (i.e. position D) on the antenna radiation module 3 are not limited to this, such as the positions A' and B' are used for grounding, and the position D' is used to connect the feed source. It should be noted that in the embodiments of the present application, the first radiator and the short-circuit arm in the two antenna radiation modules 3 have similar structures, i.e. the feed points and the grounding points of the two antenna radiation modules 3 are similar, but the arrangement directions are different.

[0052] In this embodiment, by arranging two antenna radiation modules 3 and arranging the two antenna radiation modules 3 on two sides of the floor 1, the space utilization of the antenna design can be improved while meeting the multi-antenna design; and at least one antenna radiation module 3 is further provided with a first coupling arm 32, and by the shape cooperation between the first coupling arm 32 and the first radiator 31 and the short-circuit arm 33, the mutual impedance of the two antenna radiation modules 3 can be adjusted in the hardware structure, so that the isolation between the antennas can be improved under the condition of reducing the use of capacitive or inductive devices, and the performance of the antenna can be improved.

[0053] As continued from Figure 1The two antenna radiation modules 3 are provided with a first coupling arm 32. The projection area of the first coupling arm 32 in the first direction or the second direction overlaps the first radiator of the other antenna radiation module 3, so as to realize the coupling between the first coupling arms 32 in the two antenna radiation modules 3. The mutual impedance of the two antenna radiation modules 3 can be adjusted by the shape cooperation between the first coupling arm 32 and the first radiator 31 and the short-circuit arm 33, so as to improve the isolation between the antennas and the performance of the antennas.

[0054] Optionally, the first coupling arm 32 in the antenna radiation module passes through the floor 1; that is, one end of the first coupling arm 32 is located on the first side of the floor 1, and the other end of the first coupling arm 32 is located on the second side of the floor. The first coupling arm 32 is insulated from the floor 1 and has a spacing from the other antenna radiation module 3.

[0055] It should be noted that the first coupling arm 32 can pass through the floor 1 or not pass through the floor 1, which can be determined according to the size of the antenna radiation module 3, and the embodiments of the present application are not limited.

[0056] Optionally, the floor 1 includes a floor dielectric plate 11 and a metal plate 12; the antenna dielectric plate 2 is arranged on the side of the floor dielectric plate 11, and the metal plate 12 is arranged on the first surface of the floor dielectric plate 11, and the metal plate 12 is insulated from the antenna radiation module 3.

[0057] For example, the insulation between the first coupling arm 32 and the floor 1 can be that the first coupling arm 32 and the floor 1 are filled with insulating materials, or the first coupling arm 32 and the metal plate 12 in the floor 1 have a spacing, so that the first coupling arm 32 is insulated from the floor 1.

[0058] Optionally, in the case where the two antenna radiation modules 3 both include the first coupling arm 32, the projection area of the first coupling arm 32 in the first direction or the second direction in one of the antenna radiation modules 3 overlaps the first coupling arm 32 in the other antenna radiation module 3.

[0059] As Figure 2As shown in FIG. 1, the end surface of the first coupling arm 32 in one of the antenna radiation modules 3 is arranged opposite to the end surface of the first coupling arm 32 in the other antenna radiation module 3, i.e., the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3 (or it can be understood that the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3).

[0060] It should be noted that the end surface of the first coupling arm 32 can be arranged parallel to the surface of the floor 1, or can be arranged at an angle relative to the surface of the floor 1 (for example, the end surface of the first coupling arm 32 is arranged as an inclined surface, a curved surface, etc.), as long as the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3, so as to realize the coupling between the first coupling arms 32 in the two antenna radiation modules 3, thereby adjusting the mutual impedance of the two antenna radiation modules 3 in the hardware structure through the shape cooperation between the first coupling arm 32 and the first radiator 31 and the short-circuit arm 33, so as to improve the isolation between the antennas in the case of reducing the use of capacitive or inductive devices, and further improve the antenna performance.

[0061] As shown in FIG. 1, the end surface of the first coupling arm 32 in one of the antenna radiation modules 3 is arranged opposite to the end surface of the first coupling arm 32 in the other antenna radiation module 3, i.e., the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3 (or it can be understood that the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3). Figure 3 As shown in FIG. 1, the end surface of the first coupling arm 32 in one of the antenna radiation modules 3 is arranged opposite to the end surface of the first coupling arm 32 in the other antenna radiation module 3, i.e., the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3 (or it can be understood that the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the second direction overlaps the end surface of the first coupling arm 32 in the other antenna radiation module 3).

[0062] It should be noted that the first coupling arm 32 in one of the antenna radiation modules 3 and the first radiator 31 can be arranged at an angle, and the projection area of the first coupling arm 32 in one of the antenna radiation modules 3 in the first direction or the second direction overlaps the first coupling arm 32 in the other antenna radiation module 3, so as to realize the coupling between the first coupling arms 32 in the two antenna radiation modules 3. Thus, the mutual impedance of the two antenna radiation modules 3 can be adjusted in the hardware structure by the shape cooperation between the first coupling arm 32 and the first radiator 31 and the short-circuit arm 33. Thus, the isolation between the antennas can be improved without using capacitive or inductive devices, and the performance of the antennas can be improved.

[0063] Optionally, the first coupling arm 32 is arranged at a first position on the second end of the first radiator 31, and the distance D1 from the first position to the end point of the second end of the first radiator 31 satisfies the relationship: 0≤D1

[0064] Optionally, as shown in Figure 4 The two antenna radiation modules 3 are symmetrically arranged relative to the floor 1.

[0065] The two antenna radiation modules 3 are symmetrically arranged relative to the floor 1.

[0066] Optionally, the floor 1 and the antenna dielectric plate 2 can be arranged vertically, and the flame resistance level of the antenna dielectric plate 2 is FR-4.

[0067] Optionally, the two antenna radiation modules 3 are symmetrically arranged relative to the floor 1, that is, one of the antenna radiation modules 3 is located on the first side of the floor 1, and the other antenna radiation module 3 is located on the second side of the floor 1, and the two antenna radiation modules 3 are symmetrically arranged with the floor 1 as the symmetric surface. The first side and the second side are opposite. Alternatively, the two antenna radiation modules 3 are symmetrically arranged relative to the floor 1, which can be understood as that the two antenna radiation modules 3 are mirror image structures with the floor 1 as a mirror surface.

[0068] Optionally, the two antenna radiation modules 3 are symmetrically arranged relative to the floor 1, that is, one of the antenna radiation modules 3 is located on the first side of the floor 1, and the other antenna radiation module 3 is located on the second side of the floor 1, and the two antenna radiation modules 3 are symmetrically arranged with the floor 1 as the symmetric surface. The first side and the second side are opposite. Alternatively, the two antenna radiation modules 3 are symmetrically arranged relative to the floor 1, which can be understood as that the two antenna radiation modules 3 are mirror image structures with the floor 1 as a mirror surface. Figure 4The position A' of the antenna radiation module 3 under the floor 1 is a feed point corresponding to the position A on the floor, used for connecting a feed source; the position B' of the antenna radiation module 3 under the floor 1 is a feed point corresponding to the position B on the floor, used for connecting a feed source; and the position D' of the antenna radiation module 3 is a grounding point corresponding to the position D on the floor, used for grounding. Alternatively, the positions of the feed points (i.e., the positions A' and B') and the grounding point (i.e., the position D) on the antenna radiation module 3 are not limited to the above, such as the positions A' and B' being used for grounding and the position D' being used for connecting a feed source. It should be noted that in the embodiments of the present application, the two antenna radiation modules 3 have a symmetrical structure or a mirror structure, that is, the structures of the two antenna radiation modules 3 are the same, but the setting directions are different, so the specific structure of the antenna radiation module 3 is described in the embodiments of the present application without distinguishing which antenna radiation module 3.

[0069] In the above scheme, by arranging the two antenna radiation modules 3 symmetrically relative to the floor 1, that is, by mirroring the two antenna radiation modules 3 on both sides of the floor, the space utilization of the antenna design can be improved; and the antenna radiation module 3 is further provided with the first coupling arm 32, and by the shape cooperation between the first coupling arm 32 and the first radiator 31 and the short circuit arm 33, the mutual impedance of the antenna radiation module 3 can be adjusted in the hardware structure, so that the isolation between the antennas can be improved under the condition of reducing the use of capacitive or inductive devices, and the performance of the antenna is further improved.

[0070] As shown in Figure 5 , a top view of different angles of the symmetrical array is given. The length of the two symmetrical arrays is 100 mm, and the distance between the two symmetrical arrays is 25 mm; the symmetrical array includes a radiation arm 201 and a feed part 202, and the specific position can be referred to Figure 5 . The two symmetrical arrays have four placing modes, respectively, the side view angle of the two symmetrical arrays is 0°, 45°, 75°, and 90°, and the simulation results are shown in Figure 6 and Figure 7 . As shown in Figure 6 , from 0 to 90°, the matching of the antenna is almost not affected, and the isolation gradually increases; and according to the Z parameter simulation results in Figure 7 , the imaginary part and the real part of Z21 (mutual impedance) tend to 0 as the isolation increases. It has been proved by experiments that from 0 to 90°, the isolation of the symmetrical array increases, and the absolute value of the mutual impedance tends to 0.

[0071] Alternatively, the floor 1 includes a floor dielectric plate 11 and a metal plate 12; the antenna dielectric plate 2 is arranged on the side surface of the floor dielectric plate 11, the metal plate 12 is arranged on the first surface of the floor dielectric plate 11, and the metal plate 12 has a spacing with the antenna radiation module 3.

[0072] In this embodiment, the side of the floor dielectric plate 11 is arranged on the first surface of the antenna dielectric plate 2, and optionally, the floor dielectric plate 11 can be arranged vertically with the antenna dielectric plate 2. The metal plate 12 (i.e. metal floor) is laid on the surface of the floor dielectric plate 11, and the edge of the metal plate 12 is spaced apart from the antenna dielectric plate 2, so that the gap (i.e. clearance width Gap) between the metal plate 12 in the floor 1 and the antenna radiation module 3 is left, so as to further change the end coupling between the two antenna radiation modules 3 while keeping the grounding position of the antenna unchanged. The floor dielectric plate 11 can be Fr4 dielectric.

[0073] The following describes different examples of the antenna radiation module. It should be noted that the structure of the antenna radiation module in the following embodiments can be applied to the above-mentioned symmetric antenna radiation module relative to the floor, and can be applied to the asymmetric antenna radiation module.

[0074] Optionally, the first end of the first radiator 31 is provided with a radiation arm 310 arranged towards the floor 1, and the feed point is arranged on the radiation arm 310.

[0075] As shown in Figure 4 , the first radiator 31 and the radiation arm 310 constitute an inverted L-shaped radiation arm, and the short arm of the inverted L-shaped radiation arm extends towards the floor 1.

[0076] Optionally, the first end of the first radiator 31 is provided with a short-circuit arm 33, and the grounding point is arranged on the short-circuit arm 33.

[0077] As shown in Figure 4 , the short-circuit arm 33 is arranged on one side of the short arm of the inverted L-shaped radiation arm, and the first coupling arm 32 is arranged at the end of the long arm of the inverted L-shaped radiation arm, and both the first coupling arm 32 and the short-circuit arm 33 extend towards the floor 1.

[0078] It should be noted that the short-circuit arm 33 in the embodiment of the present application can be arranged on the side facing away from the first coupling arm 32, or on the side facing towards the first coupling arm 32, and the embodiment of the present application is not limited.

[0079] Optionally, the first coupling arm 32 is arranged at a first position on the second end of the first radiator 31, and the distance D1 from the first position to the end point of the second end of the first radiator 31 satisfies the relationship: 0≤D1

[0080] As shown in Figure 4As shown, the first coupling arm 32 is arranged at the end point of the second end of the first radiator 31, i.e. D1=0. In this way, the first coupling arm 32 is arranged to have a length to generate a capacitive mutual impedance, so as to facilitate the adaptation of the first radiator 31. For example, the relevant parameters of the antenna radiation module 3: the length W1 of the first radiator, the height H4 of the antenna radiation module, the size W2 and L of the short-circuit arm, the length H1 of the coupling arm, the coupling distance C of the end of the first coupling arm 32 of the two antenna radiation modules 3, the clearance width Gap between the antenna radiation module 3 and the metal plate 12 in the floor 1, and the specific values are shown in Table 1.

[0081] Table 1

[0082]

[0083] According to the parameter values in Table 1, the simulation results are shown in Figure 8 . Among them, the original IFA represents the traditional IFA antenna, and the decoupling IFA represents the antenna device of the embodiment of the application. As can be seen, when the antenna device in the embodiment of the application adopts the parameters in Table 1, the isolation of the traditional IFA antenna is improved from 5 dB to 12 dB, and the bandwidth coverage is ensured to be 3.4-3.6 GHz.

[0084] The traditional IFA antenna is placed on both sides of the floor by mirroring, and through experimental simulation, it is known that the two antenna radiation bandwidths are located in N78 (1 / 4 IFA mode, frequency band coverage 3.4-3.6 GHz), but because the two antenna radiation modules are too close and there is no decoupling measure, the isolation between the two antenna radiation modules is only 5 dB, as shown in Figure 8 . As shown in the mutual impedance (i.e. Z parameter) curve of the traditional IFA antenna in Figure 9 , within 3.4-3.6 GHz, the imaginary part (Im) of the mutual impedance of the two antennas is positive, and the mutual impedance between the two antennas is inductive, and the isolation is poor.

[0085] For the traditional IFA antenna, the closer to the end (i.e. open end), the stronger the capacitive performance of the antenna. In the embodiment of the application, the end of the first radiator 31 in the two antenna radiation modules 3 is bent downward to form a first coupling arm 32, as shown in Figure 10 . In this way, the ends of the two first radiators 31 are closer to each other to generate a larger capacitive mutual impedance.

[0086] Optionally, the short-circuit arm 33 comprises a first branch 331 and a second branch 332; the first end of the first branch 331 is connected with the first end of the first radiator 31, the second end of the first branch 331 is connected with the second branch 332, and the second branch 332 is located on the side of the first branch 331 facing the floor 1; the grounding point is arranged on the second branch 332.

[0087] In this embodiment, the short-circuit arm 33 and the first radiator 31 can constitute an inverted F-shaped radiator. One of the radiation arms of the inverted F-shaped radiator can be provided with a feeding point for connecting a feed source, and the other radiation arm can be provided with a grounding point for grounding, as shown in Figure 10 The A' position is a feeding point for connecting a feed source, and the D position is a grounding point for grounding; or the D position can be a feeding point for connecting a feed source, and the A' position can be a grounding point for grounding, etc., which are not limited by the embodiments of the present application.

[0088] Optionally, as shown in Figure 11 , a clearance can also be left between the first coupling arm 32 and the floor 1 to increase the coupling amount between the two antenna radiation modules 3, that is, the distance (i.e., the clearance width Gap) between the floor 1 and the antenna dielectric plate 2. Specifically, the size of the first coupling arm 32 and the distance (i.e., the clearance width Gap) between the first coupling arm 32 and the floor 1 can be determined according to the size of the first radiator 31 and the short-circuit arm 33, which are not limited by the embodiments of the present application.

[0089] Optionally, continuing to refer to Figure 11 , the antenna device further comprises a first feeding part 5 and a second feeding part 6; the first feeding part 5 is located on the first side of the floor 1, and the feeding point of the first radiator 31 of one of the antenna radiation modules 3 connects the feed source through the first feeding part 5 (such as connecting the feed source through the feeding point Port.1); the second feeding part 6 is located on the second side of the floor 1, and the feeding point of the first radiator 31 of the other antenna radiation module 3 connects the feed source through the second feeding part 6 (such as connecting the feed source through the feeding point Port.2).

[0090] As shown in Figure 12 , by adjusting the distance between the open ends of the two antenna radiation modules 3 (such as the distance C between the ends of the first coupling arms 32 of the two antenna radiation modules 3 as shown in Figure 10 , the imaginary part of the mutual impedance can be effectively controlled, and the originally inductive mutual impedance between the two antenna radiation modules 3 is reduced to zero. As shown in Figure 13 , the real part of the mutual impedance is almost unchanged. As shown in Figure 14 , the isolation degree is improved, but does not exceed 10 dB.

[0091] Optionally, the short-circuit arm 33 comprises a first branch 331 and a second branch 332; a first end of the first branch 331 is connected with a first end of the first radiator 31, a second end of the first branch 331 is connected with the second branch 332, and the second branch 332 is located on a side of the first branch 331 facing the floor 1; the grounding point is arranged on the second branch 332. As will be described in more detail below with reference to Figure 4 , the distance from the first branch 331 to the floor 1 is less than the distance from the first radiator 31 to the floor 1.

[0092] In the embodiments of the present application, by arranging the distance from the first branch 321 to the floor 1 to be less than the distance from the first radiator 31 to the floor 1, i.e. arranging the short-circuit arm 33 to be shorter than the conventional IFA antenna, the input impedance of the antenna is further adjusted.

[0093] As will be described in more detail below with reference to Figure 4 , in the case that the first end of the first radiator 31 is provided with a radiating arm 310 facing the floor 1, the first end of the first branch 321 is connected with the radiating arm 310.

[0094] Specifically, the short-circuit arm 33 is introduced on the basis of the inverted L-shaped antenna to adjust the input impedance, i.e. to form an inverted F-shaped antenna. By adjusting the height L of the short-circuit arm in the IFA antenna, the input impedance of the antenna can be changed, and the mutual impedance between the two antenna radiation modules 3 is indirectly changed, as shown in Figure 15 and Figure 16 As the height of the short-circuit arm is shortened, the input impedance of the antenna is changed, and the radiation frequency band is almost unchanged, as shown in Figure 17 and Figure 18 As the height of the short-circuit arm is shortened, the mutual impedance is changed, and the zero point of the real part of the mutual impedance shifts to high frequency, as shown in Figure 17 When L = 1.2 mm, the zero point of the real part of the mutual impedance is adjusted to around 3.5 GHz.

[0095] In the embodiments of the present application, taking the N78 frequency band as an example, by reasonably arranging the height L of the short-circuit arm 33, the real part of the mutual impedance between the two antenna radiation modules 3 is adjusted to 0 around 3.5 GHz, and by reasonably arranging the coupling distance C (i.e. the distance between the ends of the first coupling arms 32 in the two antenna radiation modules 3) of the two antenna radiation modules 3, the isolation between the two antenna radiation modules 3 can be improved. As shown in Figure 19As shown, when L = 1.4 mm, by adjusting the matching and the variation curve of the isolation degree corresponding to the mouth coupling distance C, it can be known that, as the mouth coupling distance C becomes smaller, due to the capacitive effect of the end of the first coupling arm 32, the equivalent length of the antenna radiation module 3 becomes longer, the frequency shifts to low, and the isolation degree gradually becomes higher, and the isolation degree can reach 12 dB. As shown in Figure 20 As shown, the improved Z parameter (mutual impedance) curve is the Z parameter curve of the antenna device in the embodiment of the application, and the original Z parameter curve is the Z parameter curve of the traditional IFA antenna. It can be known that, compared with the mutual impedance of the traditional IFA antenna, the modulus of the real part and the imaginary part of the mutual impedance of the antenna device in the embodiment of the application is smaller.

[0096] As shown in Figure 21 As shown, the first coupling arm 32 can not be limited to be arranged at the end point of the second end of the first radiator 31, but can be arranged closer to the side of the short circuit arm 33, or the first coupling arm 32 can be arranged closer to the radiation arm 310, that is, the first coupling arm 32 for reducing the inductive component of the imaginary part of the mutual impedance can be moved to the feeding position, that is, the first coupling arm 32 is arranged at a first position on the first radiator 31, and the distance D1 from the end point of the first end of the first radiator 31 satisfies the relationship: 0 < D1 < W1; wherein W1 is the length of the first radiator 31.

[0097] For example: the related parameters of the antenna radiation module 3: the length W1 of the first radiator, the height H4 of the antenna radiation module, the size W2 and L of the short circuit arm, the length H1 of the coupling arm, the coupling distance C of the ends of the two antenna radiation modules, the clearance width Gap between the antenna and the metal plate in the floor, and the specific values are shown in Table 2, wherein example 1 is Figure 4 the related parameter example of the antenna radiation module 3 in the embodiment, and example 2 is Figure 21 the related parameter example of the antenna radiation module 3 in the embodiment.

[0098] Table 2

[0099]

[0100] As the first coupling arm 32 is moved to the feeding direction, the capacitive of the corresponding position to the antenna is weaker than that when the first coupling arm 32 is at the end, so the first coupling arm 32 needs greater capacitance (that is, the coupling distance C is smaller) to improve the isolation degree between the antennas. The obtained S parameter simulation curve is as shown in Figure 22 As shown, it can be seen that, when the antenna radiation module 3 adopts the parameters in example 2 described above, the isolation degree of the antenna is greater than 11 dB within 3.4-3.6 GHz, and can reach 14 dB at the highest. As shown in Figure 23As shown, the efficiency simulation results of Example 1 and Example 2 are given, and from the results, it can be seen that the efficiencies in the two cases are similar, and the efficiency of Example 1 is slightly better than that of Example 2.

[0101] Optionally, as shown, in the case of D1 = 0, each of the antenna radiation modules 3 can further include a radiation branch arm 34; wherein the radiation branch arm 34 is connected to an end of the first coupling arm 32 away from the first radiator 31, and the radiation branch arm 34 is located on a side of the first coupling arm 32 away from the feed point. Figure 24

[0102] In this embodiment, by providing the radiation branch arm 34 in the antenna radiation module 3, it can be further evolved into Figure 25 the antenna device shown in Figure 24 the antenna device is a transition example from Figure 4 the antenna device to Figure 25 the antenna device, which has higher antenna design flexibility, and the antenna device obtained by improving the transition example Figure 25 can reduce the overall height of the antenna device. The related parameters of the antenna radiation module 3: the length W1 of the first radiator, the height H4 of the antenna radiation module, the size W2 and L of the short-circuit arm, the length H1 of the coupling arm, the coupling distance C of the two ends of the antenna radiation module, the clearance width Gap between the antenna and the metal plate in the floor, and the specific values are shown in Table 3 below, wherein Example 1 is Figure 4 the related parameter example of the antenna radiation module 3 in Figure 24 the transition example is Figure 25 the related parameter example of the antenna radiation module 3 in

[0103] Table 3

[0104]

[0105] From the related parameters of the antenna radiation module 3 in Table 3, the total height of the antenna radiation module 3 in Example 3 is reduced from 8mm to 3.6mm compared to Example 1, and the simulation results are as shown in Figure 26 by using the 1 / 4 mode of the antenna, the isolation is generally higher than 12dB, and the extreme point is 14.5dB.

[0106] Optionally, continuing to refer to Figure 4 , the antenna device further includes a feed support plate 4, a first feed part 5, and a second feed part 6.

[0107] ​The feeding support plate 4 is arranged on the metal plate 12, and the feeding support plate 4 is arranged opposite to the floor dielectric plate 11; the first feeding part 5 is arranged on the feeding support plate 4, and the first feeding part 5 is arranged opposite to the metal plate 12; a feeding point of the first radiator 31 of one of the antenna radiation modules 3 is connected to a feed source through the first feeding part 5; the second feeding part 6 is arranged on the floor dielectric plate 11, and the second feeding part 6 is arranged opposite to the metal plate 12; a feeding point of the first radiator 31 of the other antenna radiation module 3 is connected to a feed source through the second feeding part 6.

[0108] In this embodiment, the feeding support plate 4 is used to arrange the feeding part of the antenna radiation module 3 on the metal plate 12 of the floor 1, so as to ensure that the feeding part is isolated from the metal plate 12. It should be noted that if the structure of the floor 1 itself has dielectric plates arranged on both sides of the metal plate 12, respectively, the feeding support plate 4 can also be omitted. Alternatively, the feeding support plate 4 can be a Fr4 dielectric.

[0109] Alternatively, as shown in Figure 27 and Figure 29 At least one of the antenna radiation modules 3 further comprises a second radiator 35; a first end of the second radiator 35 is connected to a first end of the first radiator 31.

[0110] In this embodiment, the second radiator 35 is arranged in the space of the free side (i.e. the side of the first end of the first radiator 31) of the antenna radiation module 3, so that a T-shaped radiator can be formed in the antenna radiation module 3, and thus the antenna radiation module 3 can work in a dual-band, i.e. a dual-band antenna is formed.

[0111] In the case that at least one of the antenna radiation modules 3 further comprises a second radiator 35, the two antenna radiation modules 3 can be symmetrically arranged relative to the floor, or asymmetrically arranged.

[0112] Alternatively, in the case that both of the two antenna radiation modules 3 comprise the second radiator 35, at least one of the antenna radiation modules 3 further comprises a second coupling arm 36; the second coupling arm 36 is arranged at the first end of the second radiator 35, and the second coupling arm 36 is arranged towards the floor 1; a projection area of the second coupling arm 36 in the first direction or the second direction of one of the antenna radiation modules overlaps with the other antenna radiation module.

[0113] In this embodiment, the second radiator 35 can be provided with a second coupling arm 36, similar to the principle of providing the first coupling arm 32 on the first radiator 31, so that the antenna radiation module 3 can form a dual-frequency decoupled antenna. The specific position and principle of the second coupling arm 36 are similar to those of the first coupling arm 32. For example, the second coupling arm 36 is arranged at a second position on the second end of the second radiator 35, and the distance D2 from the second position to the end point of the second end of the second radiator 35 satisfies the relationship: 0≤D2

[0114] For example, referring to Figure 27 The related parameters of the antenna radiation module 3 of the antenna device shown in the figure are as follows: the length W1 of the first radiator, the height H4 of the antenna radiation module, the size W2 and L of the short-circuit arm, the length H1 of the first coupling arm, the coupling distance C of the ends of the first coupling arms of the two antenna radiation modules, the clearance width Gap between the antenna and the metal plate in the floor, the length W3 of the second radiator, the length H2 of the second coupling arm, and the coupling distance C1 of the ends of the second coupling arms of the two antenna radiation modules. The specific values are shown in Table 4.

[0115] Table 4

[0116]

[0117] The antenna simulation results obtained by using the related parameters of the antenna radiation module 3 shown in Table 4 are as follows: Figure 28 As shown in the figure, the two frequency points of the antenna correspond to the 1 / 4 mode of the two arms of the T-shaped antenna, and the two frequency bands basically cover the B41 and N78 frequency bands. The isolation performance is better at the low frequency point, and the isolation at the high frequency point is 9 dB. The radiation pole and the decoupling zero point do not coincide.

[0118] Alternatively, as shown in Figure 30 The short-circuit arm 33 includes a third branch arm 333 and a fourth branch arm 334. The first end of the third branch arm 333 is connected to the first end of the first radiator 31. The second end of the third branch arm 333 is connected to the first end of the fourth branch arm 334 through a first capacitor module 335. The ground point is arranged at the second end of the second branch arm 332.

[0119] In this embodiment, by connecting a first capacitor module 335 in series between the third arm 333 and the fourth arm 334 of the short-circuit arm 33, end compensation can be performed to achieve decoupling. For example, by setting the first capacitor module 335, the coupling distance of the first coupling arm 32 or the second coupling arm 36 can be appropriately increased. The coupling distance can be the shortest distance between the end (e.g., end face) of the first coupling arm 32 or the second coupling arm 36 and another antenna radiating module, or it can be the shortest distance between the end (e.g., end face) of the first coupling arm 32 or the second coupling arm 36 and the coupling arm of another antenna radiating module, thereby reducing the design difficulty of the coupling arm. Furthermore, by setting the first capacitor module 335, the length of the short-circuit arm 33 can also be increased. For example, the larger the capacitance value of the first capacitor module 335, the longer the short-circuit arm 33. The length of the short-circuit arm 33 can refer to the length of the short-circuit arm 33 in the first direction or the length in the second direction. That is, the first capacitor module 335 can be connected in series in the first direction or in the second direction of the short-circuit arm 33.

[0120] In addition, besides connecting the first capacitor module 335 in series between the third arm 333 and the fourth arm 334 of the short-circuit arm 33, the first capacitor module 335 can also be connected in series on the PCB board of the short-circuit arm 33 connected to the ground plane, etc. The embodiments of the present invention are not limited thereto.

[0121] As another implementation method, such as Figure 31 As shown, the antenna device may include a second capacitor module 7, the first end of the second capacitor module 7 being connected to a second radiator 35 in one of the antenna radiating modules, and the second end of the second capacitor module 7 being connected to a second radiator 35 in another antenna radiating module.

[0122] In this embodiment, the second capacitor module 7 can also be used to replace the second coupling arm 36 in order to adjust the mutual impedance of the second radiator 35 and thereby improve the isolation.

[0123] This application also provides an electronic device, including the antenna device described above, which can implement the various processes of the antenna device and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0124] Optionally, the electronic device can be a mobile phone, a tablet computer or the like electronic device with an antenna device, the antenna medium plate can be arranged on the inside of the frame of the electronic device, or arranged along the direction of the frame, etc. The floor is arranged inside the electronic device, for a single-screen mobile phone, the first side of the floor can be the side where the display screen is located, and the second side of the floor can be the side where the rear shell is located, for a double-screen mobile phone, the floor can be located between the two display screens, such as the floor can be arranged on the middle frame, etc. The embodiments of the present application are not limited.

[0125] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0126] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0127] Finally, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or terminal device including the element.

[0128] The above is the preferred embodiment of the present application, it should be pointed out that for ordinary person in the art, without departing from the principles described in the present application, several improvements and refinements can also be made, which are also within the scope of protection of the present application.

Claims

1. An antenna device, characterized by The application relates to an antenna structure, which comprises a floor, an antenna dielectric plate and two antenna radiation modules. The floor and the two antenna radiation modules are arranged on a first surface of the antenna dielectric plate, and the two antenna radiation modules are respectively arranged on two sides of the floor. Each of the antenna radiation modules comprises a first radiator, a feed point and a grounding point, and the first radiator is arranged with a spacing from the floor. At least one of the antenna radiation modules further comprises a first coupling arm arranged on a second end of the first radiator and facing the floor. The projection area of the first coupling arm in one of the antenna radiation modules in a first direction or a second direction overlaps with the other antenna radiation module, wherein the first direction is parallel to the floor, and the second direction is perpendicular to the floor.

2. The antenna device of claim 1, wherein The first coupling arm of at least one of the antenna radiation modules is arranged through the floor. The first coupling arm is arranged with a spacing from the floor and the other antenna radiation module.

3. The antenna device of claim 1, wherein, In the case that both of the antenna radiation modules comprise the first coupling arm, the projection area of the first coupling arm in one of the antenna radiation modules in the first direction or the second direction overlaps with the first coupling arm in the other antenna radiation module.

4. The antenna device of claim 1, wherein, The two antenna radiation modules are symmetrically arranged relative to the floor.

5. The antenna device of claim 4, wherein, The first coupling arm is arranged on the second end of the first radiator at a first position, and the distance D1 from the first position to the end point of the second end of the first radiator satisfies the relationship 0<=D1 Wherein, W1 is the length of the first radiator.

6. The antenna device of claim 5, wherein, In the case that D1=0, each of the antenna radiation modules further comprises a radiation branch arm. The radiation branch arm is connected to the end of the first coupling arm away from the first radiator, and the radiation branch arm is located on the side of the first coupling arm away from the feed point.

7. The antenna device of claim 4, wherein, The first end of the first radiator is provided with a radiation arm facing the floor, and the feed point is arranged on the radiation arm.

8. The antenna device of claim 4, wherein, The first end of the first radiator is provided with a short-circuit arm, and the grounding point is arranged on the short-circuit arm.

9. The antenna device of claim 8, wherein, The short-circuit arm comprises a first branch arm and a second branch arm. The first end of the first branch arm is connected to the first end of the first radiator, the second end of the first branch arm is connected to the second branch arm, and the second branch arm is located on the side of the first branch arm facing the floor; and the grounding point is arranged on the second branch arm.

10. The antenna device of claim 9, wherein, The distance from the first branch arm to the floor is less than the distance from the first radiator to the floor.

11. The antenna device of claim 9, wherein, In the case that the first end of the first radiator is provided with a radiation arm facing the floor, the first end of the first branch arm is connected to the radiation arm.

12. The antenna device of claim 8, wherein, The short-circuit arm comprises a third branch arm and a fourth branch arm. The first end of the third branch arm is connected to the first end of the first radiator, the second end of the third branch arm is connected to the first end of the fourth branch arm through a first capacitance module, and the grounding point is arranged on the second end of the fourth branch arm.

13. The antenna device of claim 1, wherein, The floor includes: a floor media board and a metal plate; The antenna dielectric substrate is disposed on the side of the ground dielectric substrate, the metal plate is disposed on the first surface of the ground dielectric substrate, and there is a gap between the metal plate and the antenna radiating module.

14. The antenna device of claim 13, wherein, Also includes: Power supply support plate, first power supply section and second power supply section; The power supply support plate is disposed on the metal plate, and the power supply support plate is disposed opposite to the floor dielectric plate; The first feed section is disposed on the feed support plate, and the first feed section is disposed opposite to the metal plate; the feed point of the first radiator of one of the antenna radiation modules is connected to the feed source through the first feed section; The second feed section is disposed on the ground dielectric plate and is disposed opposite to the metal plate; the feed point of the first radiator of another antenna radiating module is connected to the feed source through the second feed section.

15. The antenna device according to any one of claims 1 to 14, characterized in that, At least one of the antenna radiating modules further includes: a second radiator; The first end of the second radiator is connected to the first end of the first radiator.

16. The antenna device of claim 15, wherein, When both antenna radiating modules include the second radiator, at least one of the antenna radiating modules further includes: a second coupling arm; The second coupling arm is disposed at the second end of the second radiator and is disposed toward the floor; wherein, the projection area of ​​the second coupling arm in one antenna radiating module in the first direction or the second direction overlaps with that of another antenna radiating module.

17. The antenna device of claim 16, wherein, The second coupling arm is positioned at a second position on the second end of the second radiator, and the distance D2 from the second position to the end point of the second end of the second radiator satisfies the relationship: 0≤D2<W2; Where W2 is the length of the second radiator.

18. The antenna device of claim 15, wherein, Also includes: Second capacitor module; The first end of the second capacitor module is connected to the second radiator in one of the antenna radiating modules, and the second end of the second capacitor module is connected to the second radiator in another antenna radiating module.

19. An electronic device, comprising: Includes the antenna device as described in any one of claims 1 to 18.

20. The electronic device of claim 19, wherein, The antenna dielectric substrate is disposed on the inner side of the frame of the electronic device.

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