Antenna assembly and small portable device

Abstract

The utility model relates to the technical field of wireless communication, in particular to an antenna assembly and small portable equipment. The antenna assembly is used for small portable equipment and comprises a radiation cylinder and a connecting wire, the radiation cylinder comprises a cylinder part and an end part, the end part is plugged at one end of the cylinder part, and a radiation space is formed in the radiation cylinder; one end of the connecting wire is connected with one side of the end part deviating from the radiation space, and the other end is used for connecting small portable equipment. Compared with the prior art, the surface area of the antenna assembly is increased by using the cylindrical structure of the radiation cylinder, the internal loss is reduced, the radiation efficiency of the antenna assembly can be improved, and the antenna assembly has a relatively small volume.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to antenna assemblies and small portable devices. Background Art

[0002] With advancements in communication technology, wireless communication devices are becoming increasingly smaller and more portable for aesthetics and ease of use, and the antennas within these devices are also becoming increasingly smaller. Currently, the most common antennas are monopole and dipole antennas. Monopole antennas are small, making them suitable for miniaturization of wireless communication devices. However, they have high impedance and low radiation efficiency, which can lead to problems such as overheating and poor signal quality. While dipole antennas offer low impedance and high radiation efficiency, they are difficult to reduce in size, making them unsuitable for small portable wireless communication devices. Utility Model Content

[0003] The present application mainly provides an antenna assembly and a small portable device that can improve radiation efficiency while having a smaller volume.

[0004] In order to solve the above technical problems, a technical solution adopted in this application is: to provide an antenna assembly for a small portable device, the antenna assembly includes a radiating tube and a connecting wire, the radiating tube includes a tube portion and an end portion, the end portion is sealed at one end of the tube portion, and a radiation space is formed inside the radiating tube; one end of the connecting wire is connected to the side of the end portion facing away from the radiation space, and the other end is used to connect to the small portable device.

[0005] In a specific embodiment, the end portion protrudes toward a side away from the radiation space, forming a hemispherical surface on a side connected to the connecting wire, and the connecting wire connects to the center of the hemispherical surface.

[0006] In a specific embodiment, the connecting wire is connected to the end portion by welding.

[0007] In a specific embodiment, at least one of the radiation tube and the connecting wire is made of metal copper.

[0008] In a specific embodiment, the radiation tube is made of metallic copper, and a shielding layer is plated on the surface of the radiation tube; and / or the connecting wire is made of metallic copper, and a shielding layer is dip-soldered on the surface of the connecting wire; wherein the shielding layer includes a tin layer and / or a nickel layer.

[0009] In a specific embodiment, the length of the radiation tube is 10-20 mm, the thickness of the side wall of the tube is 0.05-0.15 mm, and the outer diameter of the tube is 4-6 mm.

[0010] In a specific embodiment, the connecting wire includes a first section and a second section, the first section is perpendicular to the second section, one end of the first section is connected to the second section, the other end of the first section is connected to the radiation tube, and the end of the second section away from the first section is used to connect to the small portable device.

[0011] In a specific embodiment, the diameter of the connecting wire is 0.5-1 mm, and the total length of the first section and the second section is 1-11 mm.

[0012] To address the above technical issues, another technical solution adopted in this application is to provide a small portable device comprising a device body and an antenna assembly as described above. There is at least one antenna assembly; the device body comprises a housing and a mainboard, the antenna assembly is connected to the mainboard, and the housing defines an installation space within which the antenna assembly and the mainboard are disposed.

[0013] In a specific embodiment, the connecting wire of the antenna assembly includes a first section and a second section, the first section is perpendicular to the second section, one end of the first section is connected to the second section, the other end of the first section is connected to the radiating tube, and the end of the second section away from the first section is perpendicularly connected to the mainboard, and the radiating tube, the first section, and the mainboard are parallel.

[0014] The beneficial effect of the present application is that, unlike the prior art, under the condition of the same length, the radiating tube of the embodiment of the present application has a larger surface area than the common monopole antenna, and can reduce the internal loss of the antenna assembly by reducing the heat generation, thereby improving the radiation efficiency of the antenna assembly while being smaller in size, thereby achieving the effect of improving the signal transmission performance of small portable devices equipped with the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a structural diagram of the antenna assembly provided in this application;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the antenna assembly provided by this application;

[0018] Figure 3 It is a structural diagram of the small portable device provided by this application;

[0019] Figure 4 is a schematic diagram of the radiation direction of the antenna assembly provided in this application;

[0020] Figure 5 This is a schematic diagram of the radiation direction of the monopole antenna for comparison.

[0021] Reference numerals:

[0022] 1. Antenna assembly; 11. Radiating tube; 111. Tube portion; 112. End portion; 113. Radiation space; 12. Connecting wire; 121. First section; 122. Second section; 2. Small portable device; 21. Device body; 211. Housing; 212. Installation space; 213. Main board. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present application and do not limit the scope of the present application. Similarly, the following embodiments are only some embodiments of the present application and not all embodiments. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0025] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] Considering users' pursuit of aesthetics and ease of use, wireless communication devices are becoming smaller and more portable. Therefore, the antennas in wireless communication devices also need to be smaller. Currently, the most common antennas are monopole antennas and dipole antennas.

[0027] The power applied to the antenna by radiation impedance can usually be considered to be consumed in two ways: one is radiated in the form of electromagnetic waves, and the other is lost in the form of heat energy in the conductor and nearby dielectrics. The radiated power can be considered as the effective output power required for communication. However, whether it is radiated or lost in the form of heat energy, the power consumed is equal to I 2 ×R.

[0028] In the case of calculating heat loss, R represents a real resistor. However, in the case of radiation, R is a "virtual" resistor. If this resistor value is replaced by a real resistor of the same resistance, it will consume the same amount of energy as the power actually radiated by the antenna. This resistance is called the radiation impedance. Therefore, the total power of the antenna is equal to I 2 (R0)+R, where R0 is the radiation impedance and R is the total loss resistance.

[0029] The radiation pattern of a monopole antenna dictates its high impedance. Because it consists of only one conductor, its radiation efficiency is low, with some energy absorbed by the conductor, resulting in increased transmission resistance. While its small size accommodates the need for miniaturized wireless communication devices, its small surface and cross-sectional areas result in high radiation impedance and, consequently, low radiation efficiency. This can lead to obvious issues such as overheating and poor signal quality in wireless communication devices, compromising their performance.

[0030] A dipole antenna, also known as a horizontal antenna, is an antenna consisting of two conductors of equal length. Common dipole antennas include full-wavelength dipole antennas with the feed position in the middle and half-wavelength dipole antennas with the feed position at the edge.

[0031] Compared to monopole antennas, dipole antennas have lower transmission resistance. This is because the radiation pattern of dipole antennas is different from that of monopole antennas. Because dipole antennas have two conductors, they have higher radiation efficiency and less energy is lost in the conductors, resulting in a relatively low transmission resistance.

[0032] The conductor length of a dipole antenna is tailored to the signal wavelength for optimal radiation. Dipole antennas can be constructed in a variety of forms, such as linear, loop, and spiral, to meet diverse application requirements. Regardless of their form, dipole antennas offer low impedance and high radiation efficiency, but they are difficult to reduce in size. Small portable wireless communication devices have limited internal space and lack sufficient space to accommodate dipole antennas.

[0033] In order to improve or solve the above technical problems, the inventors of this application have proposed at least the following embodiments after long-term research.

[0034] like Figure 1 、 Figure 2 、 Figure 3 As shown, Figure 1 It is a structural schematic diagram of the antenna assembly provided in this application. Figure 2 It is a schematic diagram of the exploded structure of the antenna assembly provided in this application. Figure 3 Schematic diagram of the structure of the small portable device provided by this application. An embodiment of this application provides an antenna assembly 1, which can be used with a small portable device 2. The antenna assembly 1 includes a radiating tube 11 and a connecting wire 12. The radiating tube 11 includes a tube portion 111 and an end portion 112, with the end portion 112 sealed at one end of the tube portion 111, thereby forming a radiation space 113 within the radiating tube 11. One end of the connecting wire 12 is connected to the side of the end portion 112 facing away from the radiation space 113, and the other end is used to connect to the small portable device 2.

[0035] Utilizing the structure provided in this embodiment, under the condition of the same length, the radiating tube 11 has a larger surface area than the common monopole antenna, which reduces the heat generation and thus reduces the internal loss of the antenna component 1. It can improve the radiation efficiency of the antenna component 1 while being smaller in size, thereby improving the signal transmission performance of the small portable device 2 equipped with the antenna component 1.

[0036] In one embodiment, end portion 112 may be raised toward a side facing away from radiation space 113, forming a hemispherical surface on the side connected to connecting wire 12, with connecting wire 12 connected to the center of the hemispherical surface. The hemispherical surface is used to evenly and symmetrically connect the entire barrel portion 111 to the connecting wire 12, thereby improving the radiation efficiency of antenna assembly 1.

[0037] In one embodiment, the connecting wire 12 can be welded to the end 112. Welding can stably connect the radiating tube 11 and the connecting wire 12, improve the stability of signal transmission between the two, and further improve the signal transmission performance of the small portable device 2 equipped with the antenna assembly 1.

[0038] In one embodiment, at least one of the radiating tube 11 and the connecting wire 12 can be made of copper. Copper has good radiation performance. Using copper as a material can improve the radiation efficiency of the radiating tube 11 and / or the connecting wire 12, thereby improving the signal transmission performance of the small portable device 2 equipped with the antenna assembly 1.

[0039] In one embodiment, specifically, the radiation tube 11 can be made of metal copper, and the surface of the radiation tube 11 can be further plated with a shielding layer to resist electromagnetic interference and reduce noise in the signal conducted by the wire assembly 1.

[0040] Similarly, the connecting wire 12 can be made of metal copper, and a shielding layer is dip-soldered on the surface of the connecting wire 12 .

[0041] The shielding layer may include a tin layer and / or a nickel layer. Metallic tin and metallic nickel are two commonly available shielding layer materials, which are simple to set up and have reliable shielding performance.

[0042] In one embodiment, the length of the radiating tube 11 can be 10 to 20 mm. The sidewall thickness of the tube 111 can be 0.05 to 0.15 mm. The outer diameter of the tube 111 is 4 to 6 mm. This keeps the dimensions of the antenna assembly 1 within a relatively small range to accommodate the installation requirements of the small portable device 2.

[0043] Optionally, the length of the radiation tube 11 may be 15 mm, the thickness of the side wall of the tube portion 111 may be 0.1 mm, and the outer diameter of the tube portion 111 may be 5 mm.

[0044] In one embodiment, the connecting wire 12 specifically includes a first section 121 and a second section 122, with the first section 121 perpendicular to the second section 122. One end of the first section 121 is connected to the second section 122, and the other end of the first section 121 is connected to the radiating tube 11. The end of the second section 122, distal from the first section 121, is used to connect to the small portable device 2. This creates a three-dimensional structure for the antenna assembly 1, preventing it from being too long in any single direction, which would otherwise require a large installation space in that direction.

[0045] In one embodiment, the diameter of the connecting wire 12 can be 0.5-1 mm, and the total length of the first section 121 and the second section 122 can be 1-11 mm. This can adapt to small portable devices 2 with different signal transmission requirements and sizes, improving the versatility of the antenna assembly 1.

[0046] Optionally, the diameter of the connecting wire 12 may be 0.8 mm, and the lengths of the first section 121 and the second section 122 may both be 5.5 mm.

[0047] like Figure 3As shown, an embodiment of the present application further provides a small portable device 2, which may include a device body 21 and an antenna assembly 1 as described in any of the above embodiments. The number of antenna assemblies 1 is at least one. In this embodiment, the number of antenna assemblies 1 is three, and the three antenna assemblies 1 are evenly arranged at one end of the small portable device 2.

[0048] The device body 21 may include a housing 211 and a mainboard 213, and the antenna assembly 1 is connected to the mainboard 213. An installation space 212 may be formed inside the housing 211, and the antenna assembly 1 and the mainboard 213 are disposed in the installation space 212.

[0049] The structure provided in this embodiment leverages the radiation performance of antenna assembly 1 to achieve wireless communication with motherboard 213. Compared to conventional monopole antennas of the same length, antenna assembly 1's radiating tube 11 has a larger surface area, reducing heat generation and thus internal losses within antenna assembly 1. This improves the radiation efficiency of antenna assembly 1 while maintaining a smaller size, thereby enhancing the signal transmission performance of the small portable device 2 in which antenna assembly 1 is installed. The mounting space 212 formed within housing 211 also protects antenna assembly 1 and motherboard 213, reducing the likelihood of damage from external interference.

[0050] In one embodiment, the connecting wire 12 of the antenna assembly 1 includes a first section 121 and a second section 122, with the first section 121 and the second section 122 being perpendicular. One end of the first section 121 is connected to the second section 122, the other end of the first section 121 is connected to the radiating tube 11, and the end of the second section 122, remote from the first section 121, is perpendicularly connected to the mainboard 213. This arrangement of the radiating tube 11, the first section 121, and the mainboard 213 in parallel further reduces the size of the small portable device 2 and improves its portability.

[0051] Specifically, the small portable device 2 provided in the embodiment of the present application can be a handheld walkie-talkie. This type of product is characterized by its small size, making it easy to hold in one hand. Moreover, since this type of product is often used outdoors with a lot of interference and obstruction, it has high requirements for the efficiency of the internal antenna assembly 1. In the embodiment of the present application, the communication technology used by the small portable device 2 can be 5.8 GHz wireless technology, and the frequency band can specifically be 5725-5850 MHz (5.8 GHz).

[0052] For this type of product, although the use of a 5.8G dipole antenna can meet the antenna efficiency issue, the length of a 5.8G dipole antenna is usually around 200mm, which is too large to be suitable for small portable devices2. The size of a 5.8G monopole antenna is smaller, usually around 15.5mm, but if a 5.8G monopole antenna is used, although it can meet the antenna size issue, it will face the problem of low antenna efficiency, resulting in failure to meet communication quality requirements.

[0053] See Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the radiation direction of the antenna assembly provided in this application. Figure 5 The figure below is a schematic diagram of the radiation direction of a comparative monopole antenna. The comparative monopole antenna is a common 5.8GHz single-pole antenna. Figure 4 and Figure 5 The frequency of the test is 5500Mhz, and the value of the gray bar on the right side of the figure is the gain data of the antenna. It can be clearly seen from the figure that the radiation range of the antenna assembly provided by the present application is relatively uniform at a frequency of 5500Mhz, and the maximum value of the antenna gain data is 2.89; while the radiation range of the control monopole antenna at a frequency of 5500Mhz is relatively Figure 4 The antenna gain data has a maximum value of only 2.09, which is less than Figure 4 The highest value in .

[0054] See Tables 1 and 2 below. Table 1 shows the radiation performance test data for the antenna assembly provided in the embodiments of this application. Table 2 shows the radiation performance test data for a common 5.8GHz single-stage antenna. The first column in the table shows the frequency, the second column shows the antenna gain data, and the third column shows the antenna efficiency.

[0055]

[0056]

[0057] Table 1

[0058] Frequency MaxGain / dB Efficiency / % 5100 0.58 31.70 5150 0.56 31.48 5200 0.28 30.62 5250 0.72 32.21 5300 0.62 31.05 5350 0.98 33.73 5400 1.47 35.97 5450 1.57 35.32 5500 2.09 37.76 5550 1.91 35.73 5600 1.9 35.73 5650 1.89 34.59 5700 1.66 32.66 5750 1.02 30.62 5800 1.02 28.51 5850 0.53 26.67

[0059] Table 2

[0060] from Figure 4 and Figure 5As can be seen from Tables 1 and 2, within the 5100-5850 MHz frequency band, both the peak and average values ​​of the monopole antenna's antenna efficiency and antenna gain are significantly lower than those of the antenna assembly provided by the present embodiment. Therefore, it can be concluded that the antenna assembly provided by the present embodiment has superior radiation performance compared to the common 5.8 GHz monopole antenna.

[0061] The above description is only part of the implementation methods of the present application, and does not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. An antenna assembly, characterized in that: For a small portable device (2), the antenna assembly (1) comprises: A radiation tube (11) comprises a tube portion (111) and an end portion (112), wherein the end portion (112) is sealed at one end of the tube portion (111), forming a radiation space (113) in the radiation tube (11); A connecting wire (12) has one end connected to a side of the end portion (112) facing away from the radiation space (113), and the other end used for connecting to the small portable device (2).

2. The antenna assembly according to claim 1, wherein: The end portion (112) protrudes toward a side away from the radiation space (113), forming a hemispherical surface on a side connected to the connecting wire (12), and the connecting wire (12) is connected to the center of the hemispherical surface.

3. The antenna assembly according to claim 2, wherein: The connecting wire (12) is connected to the end portion (112) by welding.

4. The antenna assembly according to claim 1, wherein: At least one of the radiation tube (11) and the connecting wire (12) is made of metal copper.

5. The antenna assembly according to claim 4, wherein: The radiation tube (11) is made of metal copper, and a shielding layer is plated on the surface of the radiation tube (11); and / or, The connecting wire (12) is made of metallic copper, and a shielding layer is dip-soldered on the surface of the connecting wire (12); Wherein, the shielding layer includes a tin layer and / or a nickel layer.

6. The antenna assembly according to claim 1, wherein: The length of the radiation tube (11) is 10 to 20 mm, the thickness of the side wall of the tube portion (111) is 0.05 to 0.15 mm, and the outer diameter of the tube portion (111) is 4 to 6 mm.

7. The antenna assembly according to claim 1, wherein: The connecting wire (12) includes a first section (121) and a second section (122), wherein the first section (121) is perpendicular to the second section (122), one end of the first section (121) is connected to the second section (122), the other end of the first section (121) is connected to the radiation tube (11), and the end of the second section (122) away from the first section (121) is used to connect to the small portable device (2).

8. The antenna assembly according to claim 7, wherein: The diameter of the connecting wire (12) is 0.5 to 1 mm, and the total length of the first section (121) and the second section (122) is 1 to 11 mm.

9. A small portable device, characterized in that: include: The antenna assembly (1) according to claims 1 to 8, wherein the number of the antenna assembly (1) is at least one; The device body (21) comprises a housing (211) and a main board (213); the antenna assembly (1) is connected to the main board (213); an installation space (212) is formed inside the housing (211); the antenna assembly (1) and the main board (213) are arranged in the installation space (212).

10. The small portable device according to claim 9, wherein: The connecting wire (12) of the antenna assembly (1) includes a first section (121) and a second section (122), wherein the first section (121) is perpendicular to the second section (122), one end of the first section (121) is connected to the second section (122), the other end of the first section (121) is connected to the radiation tube (11), and one end of the second section (122) away from the first section (121) is perpendicularly connected to the main board (213), and the radiation tube (11), the first section (121), and the main board (213) are parallel.

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