A cavity antenna assembly and a terminal device

Abstract

The utility model embodiment provides a kind of cavity antenna assembly and terminal equipment. The cavity antenna assembly is applied to the terminal equipment with upper shell and lower shell, comprising: the cavity antenna with top plate and bottom plate;Top plate is provided with slit, two ground bodies and two pads, and bottom plate is butted on lower shell;Two ground bubble cottons;One side of ground bubble cotton is butted on ground body, and the other side of ground bubble cotton is butted on upper shell, to make cavity antenna and upper shell be connected with each other;Coaxial line with textile layer and wire core;Textile layer is welded to one of two pads, and wire core is welded to another of two pads. The cavity antenna assembly can still maintain good antenna performance under the premise of not changing the appearance state of terminal equipment;And, since the cavity antenna assembly is connected with cavity antenna using coaxial line, the cavity antenna assembly can not use matching circuit, which can effectively reduce the cost of the cavity antenna assembly.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a cavity antenna assembly and terminal equipment. Background Technology

[0002] With the rapid development of wireless communication technology, people have higher requirements for the appearance and functions of smart terminal devices.

[0003] Cavity antenna assemblies are essential components for intelligent terminal devices to achieve communication functions, and the performance of cavity antennas directly affects the overall communication performance and quality of terminal devices.

[0004] The use of all-metal designs for smart terminal devices has gradually become mainstream. However, the metal casing can shield and absorb the wireless signals of the terminal device, thereby affecting the connection between the terminal device and the wireless communication network, resulting in a poor user experience.

[0005] Improving the efficiency gain of cavity antennas without altering the metal casing is currently a major challenge and a key task in cavity antenna design.

[0006] Traditional metal cavity antenna designs use metal frames or metal windows to improve the performance of cavity antennas, but this requires changes to the appearance design of smart terminal devices.

[0007] In summary, traditional cavity antenna assemblies cannot maintain high antenna performance without altering the appearance of smart terminal devices; furthermore, the need for matching circuits in traditional cavity antenna assemblies leads to increased costs. Utility Model Content

[0008] The cavity antenna assembly and terminal device provided by this utility model aim to solve at least some of the defects of existing cavity antenna assemblies applicable to terminal devices.

[0009] In a first aspect, this utility model provides a cavity antenna assembly. The cavity antenna assembly is applied to a terminal device having an upper housing and a lower housing, and the cavity antenna assembly includes:

[0010] Cavity antenna; the cavity antenna has a top plate and a bottom plate arranged opposite to each other in a first direction, the top plate is provided with a gap, two grounding bodies and two solder pads, and the bottom plate abuts against the lower housing;

[0011] The two grounding electrodes are located on opposite sides of the gap in the second direction, and the two pads are located on opposite sides of the gap in the third direction.

[0012] Two grounding foams; one side of the grounding foam abuts against the grounding body, and the other side of the grounding foam abuts against the upper housing, so that the cavity antenna is connected to the upper housing;

[0013] A coaxial cable having a textile layer and a core; the textile layer is soldered to one of the two said pads, and the core is soldered to the other of the two said pads;

[0014] The first direction, the second direction, and the third direction are orthogonal to each other.

[0015] In some embodiments, the cavity antenna includes:

[0016] First back panel, second back panel, and a pair of side panels;

[0017] The first back plate and the pair of side plates both protrude from the bottom plate, and the top plate covers the end of the first back plate and the pair of side plates away from the bottom plate;

[0018] One end of the second back plate is connected to the side of the top plate away from the first back plate, and the other end of the second back plate extends along the first direction toward the bottom plate;

[0019] The top plate, the bottom plate, the first back plate, the second back plate, and the pair of side plates enclose and form a cavity.

[0020] In some embodiments, the top plate is stamped with a recessed groove along the first direction, and the groove extends through the two opposite edges of the top plate in the third direction.

[0021] In some embodiments, both grounding electrodes are disposed on the top plate, and both solder pads are disposed within the groove;

[0022] The two grounding electrodes and the two solder pads are located outside the cavity, and the gap is connected to the inside of the cavity.

[0023] In some embodiments, both the first back plate and the second back plate have a notch, and the projection of the notch onto the first back plate or the second back plate has a shape and size that are compatible with the projection of the groove onto the first back plate or the second back plate.

[0024] In some embodiments, the gap includes:

[0025] A first slit and a pair of second slits; the pair of second slits are respectively connected to the two opposite ends of the first slit in the second direction, and both of the pair of second slits extend along the third direction;

[0026] The projection of the groove on the base plate is orthogonal to the projection of the first gap on the base plate.

[0027] In some embodiments, the projection of the first gap on the base plate has a preset first length dimension, and the projection of the second gap on the base plate has a preset second length dimension;

[0028] The first length dimension and the second length dimension can tune the impedance of the cavity antenna.

[0029] In some embodiments, the cavity antenna assembly further includes:

[0030] Antenna bracket; the antenna bracket is disposed inside the cavity and abuts against the lower housing to support the cavity antenna;

[0031] The antenna support is provided with a through groove, which can accommodate the protrusion formed when the top plate is stamped into the groove.

[0032] In some embodiments, the cavity antenna, the upper housing, and the lower housing are all made of conductive material, and the antenna support is made of non-conductive material.

[0033] Secondly, this utility model provides a terminal device. The terminal device includes at least:

[0034] Decorative strips and the aforementioned cavity antenna assembly;

[0035] The upper housing of the terminal device covers the lower housing of the terminal device, and the decorative strip is disposed between the upper housing and the lower housing to enclose and form an installation cavity;

[0036] The cavity antenna assembly is housed within the mounting cavity.

[0037] At least one beneficial effect of the cavity antenna assembly and terminal device provided by this utility model embodiment is that: a novel cavity antenna assembly is proposed, which can still maintain good antenna performance without changing the appearance of the terminal device; and, since the cavity antenna assembly uses a coaxial line to connect the cavity antenna, the cavity antenna assembly does not need a matching circuit, which can effectively reduce the cost of the cavity antenna assembly. Attached Figure Description

[0038] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are designated as the same elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0039] Figure 1 A schematic diagram of the cavity antenna assembly with an upper shell, a lower shell, and a decorative strip provided in an embodiment of this utility model;

[0040] Figure 2 This is a schematic diagram of the cavity antenna assembly provided in an embodiment of the present invention;

[0041] Figure 3 An exploded view of the cavity antenna assembly provided in an embodiment of this utility model;

[0042] Figure 4 This is a schematic diagram of the cavity antenna provided in an embodiment of the present utility model;

[0043] Figure 5 A front view schematic diagram of a cavity antenna provided for an embodiment of this utility model;

[0044] Figure 6 A schematic diagram of the structure in which the upper shell, lower shell, and decorative strip enclose the mounting cavity according to an embodiment of the present utility model;

[0045] Figure 7 Simulation results of the reflection coefficient of the cavity antenna assembly provided in this embodiment of the utility model;

[0046] Figure 8 The simulation results of the radiation coefficient of the cavity antenna assembly provided in this embodiment of the utility model are shown in the figure.

[0047] Reference numerals: 100, cavity antenna assembly; 200, upper housing; 300, lower housing; 400, decorative strip; 500, mounting cavity; 1001, first direction; 1002, second direction; 1003, third direction; 1, cavity antenna; 11, top plate; 12, bottom plate; 13, first back plate; 14, second back plate; 15, side plate; 101, cavity; 111, gap; 112, grounding electrode; 113, solder pad; 114, groove; 115, protrusion; 1111, first gap; 1112, second gap; 2, grounding foam; 3, antenna bracket; 301, through slot. Detailed Implementation

[0048] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0049] It should be noted that, unless otherwise expressly specified and limited, the terms "away from", "towards", "extend", "away from", "first direction", "second direction", "third direction", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "fitting," "connection," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixing" can be bolt fixing, snap-fit ​​fixing, or glue fixing. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," and "third" may explicitly or implicitly include one or more of that feature. "A plurality" or "several" means two or more. In addition, "and / or" includes any and all combinations of one or more of the related listed items. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] In this embodiment, the specific implementation of the "cavity antenna assembly and terminal device" is not limited. Those skilled in the art can selectively use any suitable implementation method according to actual needs.

[0052] Figure 1 This is a schematic diagram of the cavity antenna assembly with an upper shell, a lower shell, and a decorative strip provided in an embodiment of the present utility model. Figure 2 This is a schematic diagram of the cavity antenna assembly provided in an embodiment of the present invention. Figure 3 An exploded view of the cavity antenna assembly provided in an embodiment of this utility model. Figure 4 This is a schematic diagram of the cavity antenna provided in an embodiment of the present invention. Figure 5 This is a front view schematic diagram of the cavity antenna provided in an embodiment of the present utility model.

[0053] Please see Figures 1-5 The cavity antenna assembly 100 is applied to a terminal device (not shown) having an upper housing 200 and a lower housing 300.

[0054] The cavity antenna assembly 100 described above includes: a cavity antenna 1, a coaxial cable (not shown in the figure), and two grounding foams 2.

[0055] A coaxial cable is a type of cable used for transmitting signals. It typically consists of a conductor (located in the inner layer of the coaxial cable), an insulation layer, a textile layer (located in the outer layer of the coaxial cable, which can also be called a shielding layer), and an outer sheath. The conductor serves as the conductor of the coaxial cable and can therefore be used to transmit signals. In addition, the textile layer can be a braided mesh or a metal foil, and can therefore be used to shield against interference signals.

[0056] It should be noted that the cavity antenna 1 has a top plate 11 and a bottom plate 12 arranged opposite to each other in the first direction 1001. The top plate 11 is provided with a slot 111, two grounding bodies 112 and two solder pads 113, and the bottom plate 12 abuts against the lower housing 300.

[0057] In this embodiment of the application, the operating frequency band of the cavity antenna 1 includes, but is not limited to, a first frequency band and a second frequency band; wherein, the first frequency band is 2.4GHz to 2.48GHz of WIFI 2.4G, and the second frequency band is 5.15GHz to 5.85GHz of WIFI 5G.

[0058] Generally speaking, the low-frequency signal of WIFI 2.4G has strong penetrating power and can penetrate obstacles such as walls; in addition, because the signal of WIFI 2.4G attenuates slowly, WIFI 2.4G is suitable for long-distance transmission.

[0059] Specifically, 5G Wi-Fi has a larger bandwidth, enabling it to support higher data transmission rates; and because 5G Wi-Fi signals have weak penetration and are easily blocked by obstacles, 5G Wi-Fi is suitable for short-distance transmission.

[0060] It is understandable that the aforementioned gap 111 can change the current distribution on the surface of the cavity antenna 1, thereby affecting the impedance of the cavity antenna 1 and the resonance of WIFI 5G.

[0061] Specifically, the two grounding electrodes 112 are located on opposite sides of the gap 111 in the second direction 1002, and the two pads 113 are located on opposite sides of the gap 111 in the third direction 1003.

[0062] To further explain, one side of the grounding foam 2 abuts against the grounding body 112, and the other side of the grounding foam 2 abuts against the upper housing 200, so that the cavity antenna 1 and the upper housing 200 are interconnected.

[0063] In this embodiment of the application, the textile layer is soldered to one of the two pads 113, and the wire core is soldered to the other pad 113.

[0064] In summary, since the cavity antenna assembly 100 uses a coaxial cable to connect the cavity antenna 1, the cavity antenna assembly 100 does not require a matching circuit, which can effectively reduce the cost of the cavity antenna assembly 100.

[0065] Furthermore, the first direction 1001, the second direction 1002, and the third direction 1003 are orthogonal to each other.

[0066] It should be noted that the cavity antenna 1 has a preset height dimension in the first direction 1001, a preset length dimension in the second direction 1002, and a preset width dimension in the third direction 1003; moreover, the height dimension, width dimension, and length dimension of the cavity antenna 1 simultaneously affect the resonant frequency of WIFI 2.4G and WIFI 5G.

[0067] It is understandable that this cavity antenna assembly 100 can be adapted to different terminal devices simply by adjusting the height, width, length, and shape of the cavity antenna 1 according to the actual design specifications.

[0068] In some embodiments, such as Figures 2-4 As shown, the cavity antenna 1 includes: a first back plate 13, a second back plate 14, and a pair of side plates 15.

[0069] The first back plate 13 and the pair of side plates 15 both protrude from the bottom plate 12, and the top plate 11 covers the end of the first back plate 13 and the pair of side plates 15 away from the bottom plate 12.

[0070] In addition, one end of the second back plate 14 is connected to the side of the top plate 11 away from the first back plate 13, and the other end of the second back plate 14 extends along the first direction 1001 toward the direction close to the bottom plate 12.

[0071] In addition, the top plate 11, the bottom plate 12, the first back plate 13, the second back plate 14 and a pair of side plates 15 enclose and form a cavity 101.

[0072] In some embodiments, combined with Figures 2-5 It can be seen that the top plate 11 is stamped with a groove 114 recessed along the first direction 1001, and the groove 114 penetrates the opposite two edges of the top plate 11 in the third direction 1003.

[0073] In some embodiments, according to Figure 2 , Figure 3 and Figure 5 It can be seen that both grounding bodies 112 are set on the top plate 11, and both solder pads 113 are set in the groove 114.

[0074] It should be noted that the two grounding electrodes 112 and the two solder pads 113 are all located outside the cavity 101, and the gap 111 is connected to the inside of the cavity 101.

[0075] In some embodiments, by Figure 3 and Figure 4 It is known that both the first back plate 13 and the second back plate 14 have notches, and the projection of the notches on the first back plate 13 or the second back plate 14 and the projection of the groove 114 on the first back plate 13 or the second back plate 14 have matching shapes and sizes.

[0076] In some embodiments, refer to Figures 2-5 It is known that the gap 111 includes: a first gap 1111 and a pair of second gaps 1112; the pair of second gaps 1112 are respectively connected to the two opposite ends of the first gap 1111 in the second direction 1002, and the pair of second gaps 1112 both extend along the third direction 1003.

[0077] It is understandable that the projection of the groove 114 on the base plate 12 is orthogonal to the projection of the first gap 1111 on the base plate 12.

[0078] In some embodiments, please refer to Figure 4 and Figure 5 The projection of the first gap 1111 onto the base plate 12 has a preset first length dimension, and the projection of the second gap 1112 onto the base plate 12 has a preset second length dimension.

[0079] Further explanation is given regarding the impedance and WIFI 5G resonance of the tunable cavity antenna 1 with the first and second length dimensions.

[0080] In some embodiments, such as Figures 1-4 As shown, the cavity antenna assembly 100 also includes an antenna support 3.

[0081] The antenna support 3 is located inside the cavity 101 and abuts against the lower housing 300 to support the cavity antenna 1.

[0082] In addition, the antenna support 3 is provided with a through groove 301, and the through groove 301 can accommodate the protrusion 115 formed when the top plate 11 is stamped with the groove 114.

[0083] In some embodiments, combined with Figures 1-4 It can be seen that the cavity antenna 1, the upper shell 200 and the lower shell 300 are all made of conductive materials, and the antenna support 3 is made of non-conductive materials.

[0084] In this embodiment, the cavity antenna 1 can be made of conductive materials such as stainless steel, copper, or nickel silver; specifically, the upper housing 200 and the lower housing 300 are made of metal to meet the user's aesthetic requirements.

[0085] It should be noted that the antenna support 3 is made of non-conductive materials such as plastic.

[0086] Figure 6 This is a schematic diagram of the structure formed by the upper shell, lower shell, and decorative strip enclosing the mounting cavity according to an embodiment of the present utility model.

[0087] Combination Figure 1 and Figure 6 It is known that the terminal device (not shown in the figure) includes at least: a decorative strip 400 and the cavity antenna assembly 100 mentioned above.

[0088] The upper housing 200 of the terminal device covers the lower housing 300 of the terminal device, and the decorative strip 400 is disposed between the upper housing 200 and the lower housing 300 to enclose and form the mounting cavity 500.

[0089] In addition, the cavity antenna assembly 100 is housed within the mounting cavity 500.

[0090] In addition, the decorative strip 400, as an exterior component of the terminal device, can be made of non-conductive materials such as plastic.

[0091] To facilitate readers' understanding of the concept of this utility model and to more thoroughly explain the structure proposed by this utility model, the following is a simulation experiment of the actual cavity antenna assembly 100.

[0092] In this simulation experiment, the length of cavity antenna 1 is 60.9 mm, the width of cavity antenna 1 is 13.9 mm, and the height of cavity antenna 1 is 8 mm.

[0093] Figure 7 The simulation results of the reflection coefficient of the cavity antenna assembly provided in this embodiment of the utility model are shown in the figure.

[0094] according to Figure 1 , Figure 2 and Figure 7 It can be seen that the reflection coefficient of cavity antenna assembly 100 is -11.179dB at the 2.4GHz resonant point; -10.163dB at the 2.5GHz resonant point; -8.965dB at the 5.15GHz resonant point; and -9.420dB at the 5.85GHz resonant point.

[0095] Generally speaking, the smaller the reflection coefficient, the better the impedance matching between the antenna and the transmission line; for example, impedance matching when the reflection coefficient is close to -10dB is better than impedance matching when the reflection coefficient is close to 0dB.

[0096] In summary, when the cavity antenna assembly 100 operates in the first frequency band (WIFI 2.4G, 2.4GHz to 2.48GHz), the impedance matching between the cavity antenna 1 and the transmission line is good, and the energy transmission efficiency of the cavity antenna 1 is high at this time.

[0097] In summary, when the cavity antenna assembly 100 operates in the second frequency band (WIFI 5G, 5.15GHz to 5.85GHz), the cavity antenna 1 and the transmission line also have good impedance matching, and the energy transmission efficiency of the cavity antenna 1 is also high at this time.

[0098] Figure 8 The simulation results of the radiation coefficient of the cavity antenna assembly provided in this embodiment of the utility model are shown in the figure.

[0099] Depend on Figure 1 , Figure 2 and Figure 8 It can be seen that the radiation efficiency of the cavity antenna assembly 100 is 91.675% at the 2.4GHz resonant point; 90.120% at the 2.5GHz resonant point; 87.222% at the 5.15GHz resonant point; and 88.001% at the 5.85GHz resonant point.

[0100] In general standards, an antenna with a radiation efficiency of ≥70% is considered to have excellent performance.

[0101] In summary, when the cavity antenna assembly 100 operates in the first frequency band (WIFI 2.4G, 2.4GHz to 2.48GHz), the radiation efficiency of the cavity antenna 1 is ≥90.120%, indicating that the cavity antenna 1 performs well.

[0102] In summary, when the cavity antenna assembly 100 operates in the second frequency band (WIFI 5G, 5.15GHz to 5.85GHz), the radiation efficiency of the cavity antenna 1 is ≥87.222%, and the performance of the cavity antenna 1 is also good at this time.

[0103] As can be seen from the above simulation experiments, the cavity antenna assembly 100 can still maintain good antenna performance and high energy transmission efficiency without changing the appearance of the terminal device.

[0104] In summary, the cavity antenna assembly and terminal device provided by this utility model embodiment can maintain good antenna performance without changing the appearance of the terminal device. Furthermore, since this cavity antenna assembly uses a coaxial cable to connect the cavity antenna, it does not require a matching circuit, effectively reducing the cost of the cavity antenna assembly. Therefore, the cavity antenna assembly and terminal device provided by this utility model embodiment have a certain degree of novelty compared to traditional cavity antenna assemblies and terminal devices.

[0105] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A cavity antenna assembly, applied to a terminal device having an upper housing and a lower housing, characterized in that, include: Cavity antenna; The cavity antenna has a top plate and a bottom plate arranged opposite each other in a first direction. The top plate is provided with a gap, two grounding electrodes and two solder pads, and the bottom plate abuts against the lower housing. The two grounding electrodes are located on opposite sides of the gap in the second direction, and the two pads are located on opposite sides of the gap in the third direction. Two grounding foams; one side of the grounding foam abuts against the grounding body, and the other side of the grounding foam abuts against the upper housing, so that the cavity antenna is connected to the upper housing; A coaxial cable having a textile layer and a core; the textile layer is soldered to one of the two said pads, and the core is soldered to the other of the two said pads; The first direction, the second direction, and the third direction are orthogonal to each other.

2. The cavity antenna assembly according to claim 1, characterized in that, The cavity antenna includes: First back panel, second back panel, and a pair of side panels; The first back plate and the pair of side plates both protrude from the bottom plate, and the top plate covers the end of the first back plate and the pair of side plates away from the bottom plate; One end of the second back plate is connected to the side of the top plate away from the first back plate, and the other end of the second back plate extends along the first direction toward the bottom plate; The top plate, the bottom plate, the first back plate, the second back plate, and the pair of side plates together form a cavity.

3. The cavity antenna assembly according to claim 2, characterized in that, The top plate is stamped with a recessed groove along the first direction, and the groove extends through the two opposite edges of the top plate in the third direction.

4. The cavity antenna assembly according to claim 3, characterized in that, Both grounding electrodes are disposed on the top plate, and both solder pads are disposed within the groove; The two grounding electrodes and the two solder pads are located outside the cavity, and the gap is connected to the inside of the cavity.

5. The cavity antenna assembly according to claim 3, characterized in that, Both the first back plate and the second back plate have notches, and the projection of the notches onto the first back plate or the second back plate has a shape and size that matches the projection of the grooves onto the first back plate or the second back plate.

6. The cavity antenna assembly according to claim 3, characterized in that, The gap includes: A first slit and a pair of second slits; the pair of second slits are respectively connected to the two opposite ends of the first slit in the second direction, and both of the pair of second slits extend along the third direction; The projection of the groove on the base plate is orthogonal to the projection of the first gap on the base plate.

7. The cavity antenna assembly according to claim 6, characterized in that, The projection of the first gap on the base plate has a preset first length dimension, and the projection of the second gap on the base plate has a preset second length dimension; The first length dimension and the second length dimension can tune the impedance of the cavity antenna.

8. The cavity antenna assembly according to claim 3, characterized in that, Also includes: Antenna bracket; the antenna bracket is disposed inside the cavity and abuts against the lower housing to support the cavity antenna; The antenna support is provided with a through groove, which can accommodate the protrusion formed when the top plate is stamped into the groove.

9. The cavity antenna assembly according to claim 8, characterized in that, The cavity antenna, the upper housing, and the lower housing are all made of conductive materials, while the antenna support is made of non-conductive materials.

10. A terminal device, characterized in that, At least including: Decorative strip and cavity antenna assembly as described in any one of claims 1-9; The upper housing of the terminal device covers the lower housing of the terminal device, and the decorative strip is disposed between the upper housing and the lower housing to enclose and form an installation cavity; The cavity antenna assembly is housed within the mounting cavity.

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