Antenna assembly, antenna module and communication equipment

Abstract

The utility model provides an antenna assembly, an antenna module and communication equipment. The antenna assembly comprises a dielectric body, a first radiation sheet, an intermediate transmission line and a second radiation sheet, the first radiation sheet, the intermediate transmission line and the second radiation sheet are sequentially laminated, the first radiation sheet and the second radiation sheet are at least partially overlapped, and the dielectric body forms a first dielectric layer between the first radiation sheet and the intermediate transmission line and forms a second dielectric layer between the intermediate transmission line and the second radiation sheet. The first dielectric layer and the second dielectric layer are respectively provided with a through hole, and coupling between the first radiation sheet and the middle transmission line and coupling between the middle transmission line and the second radiation sheet are respectively achieved through conductive columns arranged in the corresponding through holes. According to the invention, the size of the UWB antenna can be reduced, the resonant frequency, bandwidth and efficiency are improved, the isolation between adjacent antennas is improved, and the directivity of the antenna is more stable; besides, by adjusting the lengths of the two branches and the width and depth of each slot, the standing wave performance of the antenna can be stabilized while the double resonance is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to an antenna assembly, an antenna module and a communication device. BACKGROUND

[0002] With the rapid development of intelligent devices and Internet of Things (IoT), integration, miniaturization, low latency and high transmission rate have become the development trend of future intelligent communication devices. As the space of intelligent communication devices becomes smaller and the surrounding metal environment becomes more complex, the antenna design space is limited, and it is difficult to ensure that the performance of the antenna meets the design requirements in a limited space. Taking a UWB (Ultra Wide Band) antenna as an example, the traditional steel sheet type UWB antenna and the PCB UWB antenna have a large footprint and poor stability, and are easily affected by the surrounding metal, resulting in poor performance. At the same time, the isolation between the antennas is not enough, and electromagnetic interference will occur between the antennas, resulting in low efficiency. CONTENT OF THE UTILITY MODEL

[0003] In view of this, the present application provides an antenna assembly, an antenna module and a communication device, which can improve the problems of insufficient miniaturization, low bandwidth, low efficiency and poor isolation between antennas of traditional UWB antennas.

[0004] The antenna assembly provided by the present application comprises a dielectric main body, a first radiation sheet, an intermediate transmission line and a second radiation sheet which are sequentially layered, the first radiation sheet and the second radiation sheet at least partially overlap, the dielectric main body forms a first dielectric layer between the first radiation sheet and the intermediate transmission line and forms a second dielectric layer between the intermediate transmission line and the second radiation sheet, the first dielectric layer and the second dielectric layer are respectively provided with through holes, and the first radiation sheet and the intermediate transmission line and the intermediate transmission line and the second radiation sheet are respectively coupled through conductive columns arranged in the corresponding through holes.

[0005] Optionally, the second radiation sheet comprises a main body portion, a first branch and a second branch, the first branch and the second branch are respectively arranged on opposite sides of the main body portion, and the lengths of the first branch and the second branch are not equal.

[0006] Optionally, the second radiation sheet comprises a main body portion, a first branch and a second branch, the first branch and the second branch are respectively arranged on opposite sides of the main body portion, and the lengths of the first branch and the second branch are not equal.

[0007] Optionally, the widths of the first gap and the second gap are not equal.

[0008] Optionally, the medium body is an FR-4 structure.

[0009] Optionally, the first radiating sheet is provided with a hollowed-out area, and the antenna assembly further comprises an auxiliary conductive sheet arranged in the hollowed-out area and opposite to each edge of the hollowed-out area to serve as a feed point of the antenna assembly.

[0010] The application provides an antenna module, comprising:

[0011] a medium body;

[0012] at least two antenna assemblies as described in any one of the above, the first medium layer and the second medium layer of each antenna assembly serving as a part of the medium body, and the adjacent antenna assemblies are arranged opposite to each other and a defect area is arranged between the adjacent antenna assemblies.

[0013] Optionally, the adjacent antenna assemblies are symmetrically arranged along the defect area, or the second radiating sheets of the adjacent antenna assemblies are symmetrically arranged along the defect area.

[0014] Optionally, the adjacent antenna assemblies are coupled to the circuit board through a coaxial line.

[0015] The application provides a communication device, comprising the antenna assembly or the antenna module as described in any one of the above.

[0016] As described above, in the antenna assembly, the antenna module and the communication device of the application, each antenna assembly comprises the first radiating sheet and the second radiating sheet arranged in layers, so that the antenna has a small footprint, meets the design requirement of miniaturization, is applicable to many types of communication devices and has high versatility. In addition, the resonant frequency of the antenna can be adjusted by reasonably changing the size of any radiating sheet to adjust the overlapping area of the two radiating sheets, so that the bandwidth and efficiency are effectively improved. In addition, the isolation between the adjacent antennas can be greatly improved by arranging the defect area between the adjacent two antenna assemblies, the influence on the radiation direction of the antenna is reduced, the directivity of the antenna is more stable, and the consistency of the antenna design is improved.

[0017] Further, the second radiating sheet is designed to have two branches, each branch and the main part of the second radiating sheet form two slots, so that each antenna assembly can form double resonance, thereby improving the frequency coverage range and improving the signal stability. In addition, the length of each branch and the width and depth of each slot can be adjusted to stabilize the standing wave performance of the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of an antenna module provided by an embodiment of the application;

[0019] Figure 2 is Figure 1 is a structural schematic view of another perspective of the antenna module shown in

[0020] Figure 3 is Figure 1 is a schematic view of the antenna module exposing two antenna components shown in

[0021] Figure 4 is a structural schematic view of each layer of an antenna module of the present application;

[0022] Figure 5 is a curve schematic view of S11 parameters of two antenna components of the present application;

[0023] Figure 6 is a curve schematic view of isolation between two antenna components of the present application;

[0024] Figure 7 is a PDoA response map of the antenna module of the present application according to source polarization;

[0025] Figure 8 is a radiation direction schematic view of two antenna components of the present application in horizontal and vertical directions;

[0026] Figure 9 is a structural schematic view of a remote control pen with an antenna module provided by an embodiment of the present application.

[0027] a first direction x, a second direction y, and a third direction z;

[0028] antenna module 100, medium main body 1, defect ground 2, antenna component 3, first antenna component 3a, second antenna component 3b, first radiation sheet 31, intermediate transmission line 312, second radiation sheet 32, first medium layer 11, second medium layer 12, first through hole 110, second through hole 120, first conductive column 111, second conductive column 121, hollow area 310, auxiliary conductive sheet 33, main body part 320, first branch 321, second branch 322, first gap 323, second gap 324, remote control pen 200, body 201. DETAILED DESCRIPTION

[0029] To solve the above technical problems existing in the prior art, in the antenna component, antenna module and communication device of the present application, the radiation sheets of each antenna component are arranged in a stack, so that the footprint of the entire antenna meets the miniaturization design requirement, and the overlap area between the radiation sheets is adjusted by reasonably changing the size of any radiation sheet, so as to adjust the resonant frequency of the antenna, improve the bandwidth and efficiency; in addition, a defect ground is arranged between two adjacent antenna components, so as to improve the isolation between adjacent antennas.

[0030] Furthermore, the second radiating plate can be designed with two branches, each branch forming two gaps with the main body of the second radiating plate, so that each antenna component can form a dual resonance, thereby improving the frequency coverage and signal stability; in addition, by adjusting the length of each branch and the width and depth of each gap, the standing wave performance of the antenna can be stabilized.

[0031] The specific form of the shape, quantity, size, and other parameters of any of the various radiating sheets, defect sites, and branches can be determined according to the adaptability required by the actual scenario, and this application does not limit it.

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Unless otherwise specified, the following embodiments and their technical features can be combined with each other, and also belong to the technical solutions of this application.

[0033] In the description of the embodiments of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solutions of the corresponding embodiments, and are not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application.

[0034] Please refer to the following: Figures 1 to 4 As shown, an antenna module 100 according to an embodiment of this application includes a dielectric body 1, a defective ground 2, and at least two antenna components 3. The number and position of the antenna components 3 and the defective ground 2 can be adapted to actual needs and are not limited in this application. The two antenna components 3 and one defective ground 2 shown in the figure are only illustrative examples. For ease of description, these two antenna components 3 are referred to as "first antenna component 3a" and "second antenna component 3b" respectively.

[0035] The dielectric body 1 constitutes the main structural component of the entire antenna module 100, and can be formed by sequentially layering the following dielectric layers. The dielectric body 1 can be an FR-4 structural component. FR-4 material is mainly composed of glass fiber and resin, and has good electrical insulation properties, high mechanical strength and thermal stability, thus enabling the antenna module 100 to withstand high mechanical stress and thermal cycling.

[0036] For the convenience of description and understanding, the length direction of the antenna module 100 is referred to as the first direction x, the height direction or thickness direction is referred to as the second direction y, and the width direction is referred to as the third direction z, the first direction x, the second direction y, and the third direction z are perpendicular to each other, and can be regarded as three coordinate axes of a three-dimensional rectangular coordinate system. It should be understood that the so-called perpendicular in the entire application does not require that the included angle between the two be 90°, but a deviation of, for example, ±10° is allowed, that is, the so-called perpendicular can be understood as an included angle of 80° to 100° between any two directions. Similarly, the so-called parallel also does not require that the included angle between the two be 0° or 180°, but a deviation of, for example, ±10° is allowed, that is, the so-called parallel can be understood as an included angle of 0° to 10° or 170° to 190° between any two directions.

[0037] The antenna assembly 3 is combined with the medium body 1, and the combination Figure 4 As shown, the single antenna assembly 3 is also provided with a medium body, but the medium body of the single antenna assembly 3 can be regarded as part of the medium body 1. The two adjacent antenna assemblies 3 are oppositely arranged, and the so-called opposite arrangement can be understood as follows: in the plane where the medium body 1 is located or in the plane parallel to the medium body 1, the two adjacent antenna assemblies 3 have a distance not equal to zero in the line of sight along the first direction x.

[0038] The defect area 2 is located between the two adjacent antenna assemblies 3, and the defect area 2 can be defined by the medium body 1, for example, in Figure 1 In the example shown, the medium body 1 is not protrudingly arranged between the two adjacent antenna assemblies 3, so as to form the defect area 2. The main function of the defect area 2 is to reduce or eliminate the mutual interference between the two adjacent antenna assemblies 3, so as to ensure that each antenna assembly 3 can work independently and efficiently. Of course, the defect area 2 can also have the conventional effect in the art, for example, the mutual coupling between the two adjacent antenna assemblies 3 can be suppressed, so as to improve the efficiency and gain of the entire antenna module 100.

[0039] Any antenna assembly 3 can be implemented as a single antenna, including but not limited to a UWB antenna. The structures of the antenna assemblies 3 can be completely the same, but are symmetrically arranged along the defect area 2, and can include components with the same names, but the sizes and shapes of the components are different. For example, Figure 4As shown, the single antenna assembly 3 comprises a first radiating sheet 31, an intermediate transmission line 312 and a second radiating sheet 32 arranged in sequence, the first radiating sheet 31 and the second radiating sheet 32 at least partially overlap along the second direction y, the dielectric body 1 forms a first dielectric layer 11 between the first radiating sheet 31 and the intermediate transmission line 312, and forms a second dielectric layer 12 between the intermediate transmission line 312 and the second radiating sheet 32, the first dielectric layer 11 is provided with a through hole 110, which can be referred to as a first through hole 110, the second dielectric layer 12 is provided with a through hole, which can be referred to as a second through hole 120, the first radiating sheet 31 and the intermediate transmission line 312 are coupled through a conductive column 111 (which can be referred to as a first conductive column 111) arranged in the first through hole 110, and the intermediate transmission line 312 and the second radiating sheet 32 are coupled through a conductive column 121 (which can be referred to as a second conductive column 121) arranged in the second through hole 120. In this way, the first radiating sheet 31 and the second radiating sheet 32 together realize the radiating sheet of the antenna assembly 3.

[0040] The materials of the first dielectric layer 11 and the second dielectric layer 12 can be the same, for example, both are the aforementioned FR-4 material, thereby forming a dielectric layer of each antenna assembly 3, playing a role in supporting the antenna radiating sheet and adjusting the dielectric constant, for example, by adjusting the thickness of any dielectric layer, the dielectric constant between the first radiating sheet 31 and the second radiating sheet 32 can be adjusted.

[0041] The first radiating sheet 31, the intermediate transmission line 312 and the second radiating sheet 32 can be made of the material of the radiating sheet of a conventional related antenna, the materials of the first conductive column 111 and the second conductive column 121 can be completely the same as the materials of the first radiating sheet 31 and the second radiating sheet 32, or can be different. The first through hole 110 and the second through hole 120 can be formed by etching process. The arrangement of the intermediate transmission line 312 can make the positions of the first through hole 110 and the second through hole 120 flexible, that is, the positions of the first conductive column 111 and the second conductive column 121 can be flexibly set, so that the positions of the subsequent auxiliary conductive sheet 33 and the feed point can be adaptively set.

[0042] Each antenna assembly 3 is a complete device, which can be independently produced, manufactured and sold. For any antenna assembly 3, the first dielectric layer 11 and the second dielectric layer 12 form the dielectric body 1 of the antenna assembly 3, which not only completely exposes the first radiating sheet 31 and the second radiating sheet 32 to the dielectric body 1, but also plays a role in supporting the two radiating sheets and adjusting the dielectric constant of the antenna.

[0043] Based on the above, in the antenna module 100 of the present application, each antenna assembly 3 includes two radiation sheets 31, 32 arranged in a stack, which can make the overall antenna have a smaller footprint, meet the design requirements of miniaturization, and be applicable to a large number of types of communication equipment, and have extremely strong versatility. For example, the size of a single antenna assembly 3 can be implemented as 7.5 mm (length L) * 6.5 mm (width D) * 1.6 mm (height H), and the size of a single antenna is extremely small, which is convenient for integration into various types of equipment.

[0044] In addition, a plurality of antenna assemblies 3 can implement a multi-antenna design, which is conducive to the antenna module 100 to achieve high-precision positioning, and by arranging a defective land 2 between two adjacent antenna assemblies 3, the isolation between adjacent antennas (i.e., two adjacent antenna assemblies 3) can be greatly improved, the influence on the radiation direction of the antenna is reduced, the directivity of each antenna is more stable, and the consistency of the antenna design is conducive.

[0045] Please continue to refer to Figures 1 to 4 As shown, the first radiation sheet 31 can be provided with a hollow area 310, the antenna assembly 3 further includes an auxiliary conductive sheet 33, the auxiliary conductive sheet 33 is arranged in the hollow area 310, and the edges of the first radiation sheet 31 and the edges of the hollow area 310 are arranged opposite to each other to serve as a feed point of the antenna assembly 3. The hollow area 310 and the first radiation sheet 31 can both be rectangular, and for example, the two long edges of the hollow area 310 can be arranged opposite to the two long edges of the first radiation sheet 31, and the two short edges of the hollow area 310 can be arranged opposite to the two short edges of the first radiation sheet 31. It should be noted that the distance between the adjacent edges meets the design requirements of the feed point. The auxiliary conductive sheet 33 is located on the same plane as the first radiation sheet 31, or in other words, the auxiliary conductive sheet 33 is located on the plane where the first radiation sheet 31 is located, and from another angle, the auxiliary conductive sheet 33 can be regarded as a part of the first radiation sheet 31.

[0046] In addition, a gap antenna can be formed between the first radiation sheet 31 and the edges of the hollow area 310, and by adjusting the distance between the first radiation sheet 31 and the edges of the hollow area 310, the operating frequency of the gap antenna can be adjusted, and the return loss of the gap antenna can be controlled.

[0047] Each antenna assembly 3 can be welded to a circuit board (not shown in the figure) through the auxiliary conductive sheet 33, so as to be fed and coupled to the circuit board, and other structural members except the auxiliary conductive sheet 33, such as the first radiation sheet 31, can not need to be fed and coupled to the circuit board. In an example, adjacent antenna assemblies 3 can be fed and coupled to the circuit board through a coaxial line.

[0048] Continuing to refer to Figures 1 to 3 As shown, the second radiating sheet 32 includes a main body part 320, a first branch 321 and a second branch 322, the first branch 321 and the second branch 322 are respectively arranged on opposite sides of the main body part 320, and the lengths of the first branch 321 and the second branch 322 are not equal. Further, the first branch 321 and the main body part 320 form a first gap 323, and the second branch 322 and the main body part 320 form a second gap 324, and the widths of the first gap 323 and the second gap 324 can be unequal. The second radiating sheet 32 of the adjacent antenna assembly 3 can be symmetrically arranged along the defective ground 2.

[0049] Here, the second radiating sheet 32 is designed to have two branches 321 and 322, and two gaps 323 and 324 are formed between each branch and the main body part 320 of the second radiating sheet 32, so that each antenna assembly 3 can form double resonance, thereby improving the frequency coverage range and improving the signal stability; in addition, by adjusting the length of each branch and the width and depth of each gap, the standing wave performance of the antenna can be stabilized.

[0050] In other examples, a microstrip line can be provided on the circuit board, and the microstrip line is coupled to feed one of the first radiating sheet 31 and the auxiliary conductive sheet 33. The coupling feed of each antenna assembly 3 is realized through the microstrip line, and the coupling feed can improve the bandwidth of each antenna while reducing the influence on the antenna radiation direction. Taking the example of coupling feed with the auxiliary conductive sheet 33, a third dielectric layer can be provided between the microstrip line and the auxiliary conductive sheet 33 along the stacking direction (i.e. the second direction y), and the third dielectric layer can be part of the dielectric main body 1. The microstrip line and the auxiliary conductive sheet 33 are relatively arranged through the third dielectric layer to realize coupling feed. In actual scenarios, the relative distance between the microstrip line and the auxiliary conductive sheet 33 along the stacking direction is in millimeter level, i.e. the thickness of the third dielectric layer is in millimeter level, for example, about 0.5 millimeters. The millimeter level relative distance can ensure good coupling feed between the microstrip line and the auxiliary conductive sheet 33, and can ensure that the auxiliary conductive sheet 33 is not exposed, i.e. the third dielectric layer can better protect the auxiliary conductive sheet 33.

[0051] For Figures 1 to 4 For the antenna module 100 shown in the structure, in the example that each antenna assembly 3 is a UWB antenna, in combination with Figure 5 As shown in the curve diagram of the S11 parameter of the two antenna assemblies 3, the S11 parameter refers to the reflection coefficient of the input end of the antenna assembly 3, and is used to measure the matching degree between the antenna assembly 3 and the transmission line, in combination with Figure 5As shown, when the resonant frequency is in the range of 7.6-8.4GHz, the bandwidth of each of the two antenna assemblies 3 exceeds 800MHz, and the S11 parameter is less than -10dB, so that the performance of the two antennas is relatively superior. Moreover, each antenna assembly 3 can form a double resonance.

[0052] In combination Figure 6 As shown in the isolation curve diagram between the two antenna assemblies 3, it can be seen that the maximum isolation between the two antenna assemblies 3 is below -15dB, and the interference between the adjacent two antenna assemblies 3 is very low, which is conducive to meeting the stable performance requirements of the communication device.

[0053] In combination Figure 7 As shown in the PDoA (Phase Difference of Arrival) response diagram (simulation CH9) generated according to the source polarization, the abscissa represents the angle of arrival (AOA, Angle of Arrival) of the signal to the antenna module 100, and the ordinate represents the signal amplitude. It can be seen that as the signal amplitude increases, the incident angle is larger, and the position of the signal source can be more accurately determined by measuring the incident angle of the signal, and a centimeter-level positioning accuracy can be achieved. At the same time, the AOA technology can adapt to different environmental conditions, such as maintaining high-precision positioning in multipath effect and shielding environment.

[0054] In combination Figure 8 As shown in the radiation direction diagram of the two antenna assemblies 3 in the horizontal and vertical directions, it can be seen that the 3dB lobe width of the two antenna assemblies 3 in these two directions is greater than 120deg. The directivity is good while having sufficient radiation width, which can adapt to different environmental conditions to maintain high-precision positioning.

[0055] The embodiments of the present application also provide a communication device comprising the antenna module 100 of any of the above embodiments, so as to produce the beneficial effects that the antenna module 100 of the corresponding embodiments can produce. The specific forms of the communication device are not limited in the present application, for example, it can be a remote control pen, a smart phone, etc.

[0056] Taking the communication device as a remote control pen as an example, in combination Figure 9 As shown, the remote control pen 200 comprises a body 201 and an antenna module 100, and the antenna module 100 can be arranged at one end of the body 201. The circuit board built-in the body 201 can be coupled and fed with power through the auxiliary conductive sheet 33 of each antenna assembly 3, for example, a coaxial line. One end of the body 201 can be fixed with the dielectric main body 1 of the antenna module 100, and specifically fixed with the first dielectric layer 11 of the dielectric main body 1, so as to fix and assemble the antenna module 100 at the end of the remote control pen 200.

[0057] The above merely describes some embodiments of the present application, and does not limit the patent scope of the present application. For those of ordinary skill in the art, any equivalent structural transformation made by using the content of the present application and the drawings is also included in the patent protection scope of the present application.

[0058] Although the terms "first", "second", etc. are used herein to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. In addition, the singular forms "one", "a", and "the" are intended to include the plural forms. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. The exception to this definition occurs only when a combination of elements, functions, steps, or operations are in some way inherently mutually exclusive.

Claims

1. An antenna assembly, characterized in that, The device includes a dielectric body and a first radiating sheet, an intermediate transmission line, and a second radiating sheet arranged in sequence. The first and second radiating sheets at least partially overlap. The dielectric body forms a first dielectric layer between the first radiating sheet and the intermediate transmission line, and a second dielectric layer between the intermediate transmission line and the second radiating sheet. The first and second dielectric layers are respectively provided with through holes. The first radiating sheet and the intermediate transmission line, as well as the intermediate transmission line and the second radiating sheet, are coupled through conductive posts disposed in the corresponding through holes.

2. The antenna assembly according to claim 1, characterized in that, The second radiating sheet includes a main body, a first branch and a second branch, the first branch and the second branch being disposed on opposite sides of the main body, and the lengths of the first branch and the second branch are not equal.

3. The antenna assembly according to claim 1 or 2, characterized in that, The second radiating sheet includes a main body, a first branch, and a second branch. The first branch and the second branch are respectively disposed on opposite sides of the main body. A first gap is formed between the first branch and the main body, and a second gap is formed between the second branch and the main body.

4. The antenna assembly according to claim 3, characterized in that, The widths of the first gap and the second gap are not equal.

5. The antenna assembly according to claim 1, characterized in that, The main body of the medium is an FR-4 structural component.

6. The antenna assembly according to claim 1, characterized in that, The first radiating plate has a hollow area, and the antenna assembly also includes an auxiliary conductive plate, which is disposed in the hollow area and is positioned opposite to each edge of the hollow area to serve as the feed point of the antenna assembly.

7. An antenna module, characterized in that, include: Medium body; At least two antenna assemblies as described in any one of claims 1 to 6, wherein the first dielectric layer and the second dielectric layer of each antenna assembly are part of the dielectric body, the adjacent antenna assemblies are disposed opposite each other, and the adjacent antenna assemblies are disposed in a defective manner.

8. The antenna module according to claim 7, characterized in that, Adjacent antenna assemblies are arranged symmetrically along the defect, or the second radiating plates of adjacent antenna assemblies are arranged symmetrically along the defect.

9. The antenna module according to claim 7 or 8, characterized in that, The adjacent antenna components are fed to the circuit board via a coaxial cable.

10. A communication device, characterized in that, It includes the antenna assembly according to any one of claims 1 to 6, or the antenna module according to any one of claims 7 to 9.

Images