Antenna and wireless device

Abstract

The utility model discloses an antenna and wireless equipment, and belongs to the technical field of antennas. The antenna comprises a substrate, a plurality of radiation units, a transmission unit and a feeding point. The plurality of radiation units are used for transmitting or receiving radio frequency signals, the transmission unit is electrically connected with the feeding point and the plurality of radiation units, and the plurality of radiation units, the transmission unit and the feeding point are integrally formed on the same side of the substrate. Compared with an antenna in which the feeding point and the plurality of radiation units are electrically connected through a bonding pad and a coaxial line, the antenna provided by the utility model can greatly simplify the processing procedure of the antenna, thereby improving the production efficiency of the antenna and reducing the production cost of the antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication devices, in particular to an antenna and a wireless device. BACKGROUND

[0002] Nowadays, most of the routers on the market support dual frequency, that is, two frequency bands of 2.4GHz and 5GHz. For the router supporting dual frequency, the antenna can adopt a dual-frequency single-feed antenna or a dual-frequency double-feed antenna, wherein the dual-frequency single-feed antenna is more widely applied due to the advantages of small design difficulty.

[0003] The dual-frequency single-feed antenna comprises a substrate, a plurality of radiation units, a plurality of pads, a coaxial line and a feed point. The plurality of radiation units, the plurality of pads, the coaxial line and the feed point are arranged on the same side of the substrate, and the coaxial line is electrically connected with the plurality of radiation units and the feed point through the plurality of pads respectively.

[0004] However, for the above structure, in the processing process of the antenna, the plurality of pads need to be welded with the plurality of radiation units and the feed point respectively, and then the coaxial line is connected with the plurality of pads. The processing procedure of the dual-frequency single-feed antenna is relatively complex, which leads to high processing cost. CONTENT OF THE INVENTION

[0005] The present application provides an antenna and a wireless device, which can simplify the processing procedure of the antenna, thereby reducing the overall cost of the antenna and the wireless device. The corresponding technical solutions are as follows:

[0006] In a first aspect, the present application provides an antenna, which comprises a substrate, a plurality of radiation units, a transmission unit and a feed point. The plurality of radiation units are used for transmitting or receiving radio frequency signals, the transmission unit is electrically connected with the feed point and the plurality of radiation units respectively, and the plurality of radiation units, the transmission unit and the feed point are integrally formed on the same side of the substrate.

[0007] Among them, the radiation unit is the core component in the antenna, also known as antenna oscillator, which is used for transmitting or receiving electromagnetic waves, thereby realizing the transmission of wireless signals. Specifically, when an alternating current flows through the inside of the radiation unit, according to the principle of electromagnetic induction, a changing electric field and magnetic field will be generated around the antenna oscillator, thereby forming electromagnetic waves. Further, the radiation unit can control the directivity of transmitting or receiving electromagnetic waves. By designing the shape, size and arrangement form of the oscillator, the antenna can be made to have omnidirectional or directional electromagnetic waves, and the antenna can receive electromagnetic waves in all directions or directional directions. The antenna comprises a plurality of radiation units, the number of which is usually two or three.

[0008] The transmission unit is a component in the antenna for electrically connecting the radiating unit and the external circuit. In the transmitting end of the wireless device (router), the electrical signal emitted by the chip enters the transmission unit after passing through the external circuit (including the radio frequency circuit and the matching circuit), and then enters the radiating unit through the transmission unit to emit electromagnetic waves outward. Correspondingly, in the receiving end, the radiating unit receives electromagnetic waves to generate an electric current according to the principle of electromagnetic induction. The electric current enters the external circuit through the transmission unit and finally enters the chip in the form of an electrical signal. Further, the transmission unit can be a coaxial cable or a microstrip line. In this application, the transmission unit is a microstrip line, and the transmission unit and the radiating unit are integrally formed components. The transmission unit and the radiating unit are usually made of metal materials and have good electrical conductivity and electromagnetic wave radiation capability. Common materials for the transmission unit and the radiating unit can be aluminum and copper.

[0009] The feed point is a component in the antenna for connecting the transmission unit and the external circuit. Through the feed point, electrical energy can be transmitted from the external circuit to the transmission unit and then to the radiating unit to achieve the emission of electromagnetic waves outward. The types of feed points include center feed points and coplanar waveguide feed points.

[0010] The substrate is a component in the antenna for connecting the feed point, the radiating unit, and the transmission unit and providing support for these components. In the antenna, the substrate can also be referred to as a substrate. The substrate material is usually a dielectric material with a high dielectric constant, such as polytetrafluoroethylene, epoxy resin, hydrocarbon resin, PPO polyphenyl ether, etc. These materials have good electrical properties and mechanical stability. Further, the substrate can be processed using a base material with a Dk value between 2.8 and 4.8 (e.g., 3.0). The substrate has a plate-like structure, and the feed point, the radiating unit, and the transmission unit can be located on the same side of the substrate. The transmission unit, the radiating unit, and the feed point can be integrally formed on the same side of the substrate using a printing process.

[0011] Compared with the related art, the technical solution shown in this application first processes and forms the substrate, then welds the pads with the multiple radiating units and feed points on the circuit layer of the substrate, and finally welds the coaxial line with the multiple pads. The multiple radiating units, transmission units, and feed points are integrally formed on the same side of the substrate through a printing process, which greatly simplifies the processing procedure of the antenna, thereby improving the production efficiency of the antenna and reducing the cost.

[0012] At the same time, the multiple radiating units, transmission units, and feed points are integrally formed on the same side of the substrate through a printing process, so there is no need to weld the pads and the coaxial line one by one during the processing of the antenna. In different antennas, the connection positions of the radiating units and the transmission units will not differ due to pad miswelding, which can improve the consistency of the positions of the components in the antenna and thereby improve the yield of the antenna.

[0013] In some possible implementation manners, the antenna comprises a plurality of radiation units, the plurality of radiation units are respectively a first radiation unit, a second radiation unit and a third radiation unit, the three radiation units are all dipole radiation units, and are arranged at intervals.

[0014] The technical solution shown in the application sets all the plurality of radiation units as dipole radiation units, which makes the antenna have good directivity, has a relatively wide radiation angle in the vertical direction, and can bidirectionally radiate, that is, the radiation intensity of the antenna at both ends is equal or similar. In the application, the first radiation unit, the second radiation unit and the third radiation unit are arranged at intervals, which can reduce the mutual coupling phenomenon between the radiation units, thereby improving the radiation efficiency of the radiation units. Meanwhile, by adjusting the interval between adjacent radiation units, the electromagnetic waves radiated by adjacent radiation units can be interfered and enhanced, thereby improving the performance of the antenna.

[0015] Specifically, the first radiation unit, the second radiation unit and the third radiation unit are all dipole radiation units, the first radiation unit comprises adjacent first and second arms, the second radiation unit comprises adjacent third and fourth arms, and the third radiation unit comprises adjacent fifth and sixth arms.

[0016] Further, in the application, the transmission unit comprises a first transmission line, a second transmission line and a third transmission line, the first transmission line, the second transmission line and the third transmission line are all microstrip lines. The first transmission line is connected with the first arm and a feeding point of the antenna respectively to realize electrical connection between the feeding point and the first arm, the second transmission line is connected with the second arm and the third arm respectively to realize electrical connection between the second arm and the third arm, and the third transmission line is connected with the fourth arm and the fifth arm respectively to realize electrical connection between the fourth arm and the fifth arm. The sixth arm of the third radiation unit can be grounded through a coaxial line, specifically, the sixth arm can be grounded through an outer line of the coaxial line, and an inner line of the coaxial line is used for electrically connecting an external circuit and the feeding point. It can be understood that the first arm and the second arm, the third arm and the fourth arm, and the fifth arm and the sixth arm are not electrically connected, and the first arm and the second arm, the third arm and the fourth arm, and the fifth arm and the sixth arm are all transmitted through electromagnetic induction principle, that is, the current is transmitted in the mode of radiating electromagnetic waves in space.

[0017] In some possible implementation manners, the second arm of the first radiation unit, the third arm and the fourth arm of the second radiation unit, and the fifth arm of the third radiation unit all comprise two branch arms. Specifically, the second arm comprises a first branch arm and a second branch arm, the third arm comprises a third branch arm and a fourth branch arm, the fourth arm comprises a fifth branch arm and a sixth branch arm, and the fifth arm comprises a seventh branch arm and an eighth branch arm.

[0018] Optionally, the first branch arm and the second branch arm can be spaced apart and distributed on two sides of the first transmission line, the third branch arm and the fourth branch arm can be spaced apart and distributed on two sides of the first transmission line, the fifth branch arm and the sixth branch arm can be spaced apart and distributed on two sides of the first transmission line, and the seventh branch arm and the eighth branch arm can be spaced apart and distributed on two sides of the first transmission line.

[0019] The technical scheme shown in the present application, the second arm, the third arm, the fourth arm and the fifth arm each include two branch arms, and the two branch arms of the same arm are spaced apart and distributed on two sides of the first transmission line. This is equivalent to that the middle part of the second arm, the third arm, the fourth arm and the fifth arm is provided with a avoiding space for mounting the first transmission line. Compared with the scheme of connecting multiple radiation units by arranging a coaxial line in the related art, the avoiding space can make the first transmission line not necessarily be arranged above the multiple radiation units, but make the first transmission line and the multiple radiation units be located in the same plane, so that the overall thickness of the antenna can be reduced, and the miniaturization design of the antenna and the wireless device is facilitated.

[0020] Optionally, the first branch arm and the second branch arm can be symmetrically distributed on two sides of the first transmission line, the third branch arm and the fourth branch arm can be symmetrically distributed on two sides of the first transmission line, the fifth branch arm and the sixth branch arm can be symmetrically distributed on two sides of the first transmission line, and the seventh branch arm and the eighth branch arm can be symmetrically distributed on two sides of the first transmission line. In this way, the antenna can have good directivity, and the wiring of the antenna can be more neat.

[0021] In some possible implementation manners, the second transmission line includes a first sub-transmission line and a second sub-transmission line, the first sub-transmission line is electrically connected with the first branch arm and the third branch arm respectively, and the second sub-transmission line is electrically connected with the second branch arm and the fourth branch arm respectively, the third transmission line includes a third sub-transmission line and a fourth sub-transmission line, the third sub-transmission line is electrically connected with the fifth branch arm and the seventh branch arm respectively, and the fourth sub-transmission line is electrically connected with the sixth branch arm and the eighth branch arm respectively.

[0022] Specifically, the first sub-transmission line and the second sub-transmission line can be spaced apart and distributed on two sides of the first transmission line, and the first sub-transmission line is located on one side of the first branch arm close to the first transmission line, and the second sub-transmission line is located on one side of the second branch arm close to the first transmission line, that is, the first sub-transmission line and the second sub-transmission line are closer to the first transmission line than the corresponding branch arms. Correspondingly, the third sub-transmission line and the fourth sub-transmission line can also be closer to the first transmission line than the corresponding branch arms. In this way, the wiring of the antenna can be more neat, and the antenna can have good gain at the same time.

[0023] In some possible implementation manners, a distance between the first arm and the second arm is within a first interval, distances between the second arm and the third arm and between the fourth arm and the fifth arm are within a second interval, and distances between the third arm and the fourth arm and between the fifth arm and the sixth arm are within a third interval.

[0024] The first interval is [2.2mm, 3.8mm], the second interval is [0.6mm, 2.8mm], and the third interval is [0.2mm, 2.0mm].

[0025] For example, the distance between the first arm and the second arm is 3.4mm, the distances between the second arm and the third arm and between the fourth arm and the fifth arm are both 2.1mm, and the distances between the third arm and the fourth arm and between the fifth arm and the sixth arm are both 1.4mm.

[0026] By reasonably setting the distances between the plurality of radiation units and the distances between the two arms in each radiation unit, the impedance can be improved, the radiation efficiency of the radiation unit can be improved, the electromagnetic waves radiated by adjacent radiation units can be superimposed and enhanced in the far field, and thus the performance of the antenna can be improved.

[0027] In some possible implementation manners, the plurality of radiation units in the antenna include a first radiation unit, a second radiation unit and a third radiation unit, the first radiation unit and the third radiation unit are dual-frequency radiation units, and the second radiation unit is a single-frequency radiation unit.

[0028] The two operating frequency bands of the first radiation unit and the third radiation unit are the same, and the operating frequency band of the second radiation unit is any one of the two operating frequency bands.

[0029] Specifically, the two operating frequency bands of the first radiation unit and the third radiation unit can both be 2.4GHz and 5GHz, and the operating frequency of the single-frequency radiation unit can be 5GHz. Of course, the two operating frequency bands of the first radiation unit and the third radiation unit can also be 2.4GHz and 5.2GHz, and can also be 2.4GHz and 5.8GHz.

[0030] Alternatively, the first radiation unit and the third radiation unit can be distributed on two sides of the second radiation unit. In this way, the two dual-frequency radiation units can be symmetrically arranged about the single-frequency radiation unit, so that the antenna has good directivity and gain.

[0031] In some possible implementation manners, top surfaces of the plurality of radiating units, the transmission unit and the feeding point are located in the same plane.

[0032] The top surface is a wall surface away from the substrate.

[0033] According to the technical solutions provided in the present application, the plurality of radiating units, the transmission unit and the feeding point are integrally formed on the same side of the substrate, and the wall surfaces of the plurality of radiating units, the transmission unit and the feeding point away from the substrate are located in the same plane, so that the antenna as a whole is relatively flat, and the antenna is more suitable for being arranged in a narrow space, and the arrangement flexibility of the antenna can be improved.

[0034] In a second aspect, the present application provides a wireless device, which can be a router, and the wireless device comprises the antenna in the first aspect and possible implementation manners thereof.

[0035] The wireless device provided in the second aspect of the present application has the beneficial effects of the antenna provided in the first aspect of the present application, which will not be described here.

[0036] According to the technical solutions provided in the present application, the plurality of radiating units, the transmission unit and the feeding point in the antenna are integrally formed on the same side of the substrate through a printing process, so that the processing procedure of the antenna is greatly simplified, and the production efficiency of the antenna can be improved and the cost can be reduced.

[0037] Meanwhile, the plurality of radiating units, the transmission unit and the feeding point are integrally formed on the same side of the substrate through the printing process, so that the antenna does not need to be welded with pads and coaxial lines one by one in the processing procedure, and the connection positions of the radiating units and the transmission units in different antennas will not be different due to pad offset welding, the consistency of the positions of the components in the antenna can be improved, and the yield of the antenna can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structural schematic diagram of an antenna provided by an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of an antenna provided by an embodiment of the present application;

[0040] Figure 3 is a structural schematic diagram of an antenna provided by an embodiment of the present application;

[0041] Figure 4 is a structural schematic diagram of a first supporting arm provided by an embodiment of the present application;

[0042] Figure 5 is a dipole azimuth plane diagram of an antenna provided by an embodiment of the present application under a 2.4 GHz frequency band;

[0043] Figure 6 is a dipole elevation plan of an antenna under a 2.4 GHz frequency band provided by an embodiment of the present application;

[0044] Figure 7 is a dipole azimuth plan of an antenna under a 5 GHz frequency band provided by an embodiment of the present application;

[0045] Figure 8 is a dipole elevation plan of an antenna under a 5 GHz frequency band provided by an embodiment of the present application;

[0046] Figure 9 is a structural schematic diagram of an antenna in the related art.

[0047] Legend

[0048] 1, substrate;

[0049] 2, radiation unit;

[0050] 21, first radiation unit; 22, second radiation unit; 23, third radiation unit;

[0051] 211, first arm; 212, second arm; 221, third arm; 222, fourth arm; 231, fifth arm; 232, sixth arm;

[0052] 2121, first branch arm; 2122, second branch arm; 2211, third branch arm; 2212, fourth branch arm;

[0053] 2221, fifth branch arm; 2222, sixth branch arm; 2311, seventh branch arm; 2312, eighth branch arm;

[0054] 2111, ninth branch arm; 2112, tenth branch arm; 2113, first connecting part;

[0055] 21111, first stub; 21112, second stub; 21121, third stub; 21122, fourth stub;

[0056] 2321, eleventh branch arm; 2322, twelfth branch arm; 2323, second connecting part;

[0057] 3, transmission unit;

[0058] 31, first transmission line; 32, second transmission line; 33, third transmission line;

[0059] 321, first sub-transmission line; 322, second sub-transmission line; 331, third sub-transmission line; 332, fourth sub-transmission line;

[0060] 4, feeding point;

[0061] 5. Coaxial line. DETAILED DESCRIPTION

[0062] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application with reference to the drawings.

[0063] Although the description of the present application will be introduced in combination with some embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications which can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the present application, some specific details will be omitted in the description. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0064] In the embodiments of the present application, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third", "fourth" can explicitly or implicitly include one or more of the features.

[0065] In the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0066] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood in a broad sense, for example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. The orientation language mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inner", "outer" and the like, is only the direction of the drawing, therefore, the orientation language used is to better, more clearly illustrate and understand the embodiments of the present application, and is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0067] Reference in this specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "including," "comprising," "having" and variations thereof are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0068] Nowadays, dual-band single-feed antennas are widely used in home routers. Figure 9 is a structural schematic diagram of a dual-band single-feed antenna shown in the related art, see Figure 9 The dual-band single-feed antenna includes a substrate, three radiation units, multiple pads, two coaxial lines, and a feed point. The three radiation units, the two coaxial lines, and the feed point are arranged on the same side of the substrate. Each of the multiple radiation units is a dipole radiation unit. Two arms of each radiation unit are welded to two different pads respectively. Inner and outer lines of the coaxial line are welded to different pads respectively. The processing procedure of the antenna is relatively complex, resulting in a high processing cost.

[0069] The application relates to an antenna, which can be a WiFi (Wireless Fidelity) antenna of a home router. The antenna can be a dual-band single-feed antenna, that is, the antenna includes two working frequency bands and one feed point. The two working frequency bands can be a first frequency band and a second frequency band. The first frequency band can be a 5G frequency band, and the second frequency band can be a 2.4G frequency band.

[0070] As shown in Figure 1 , the antenna includes a substrate 1, multiple radiation units 2, a transmission unit 3, and a feed point 4. The multiple radiation units 2 are used for transmitting or receiving radio frequency signals. The transmission unit 3 is electrically connected to the feed point 4 and the multiple radiation units 2 respectively. The multiple radiation units 2, the transmission unit 3, and the feed point 4 are integrally formed on the same side of the substrate 1.

[0071] The substrate 1 is used for physically connecting the multiple radiation units 2, the transmission unit 3, and the feed point 4 and providing support for the multiple radiation units 2, the transmission unit 3, and the feed point 4. The multiple radiation units 2 can have different working frequency bands, so that the antenna has the two working frequency bands of the first frequency band and the second frequency band. The multiple radiation units 2, the transmission unit 3, and the feed point 4 can be integrally formed on the same side of the substrate 1 through a printing process.

[0072] According to the technical solution provided in the present application, the plurality of radiation units 2, the transmission unit 3 and the feeding point 4 can be integrally formed on the same side of the substrate 1 by a printing process, compared with the related art, two processes of welding the pad and the radiation unit together and welding the coaxial line and the pad together are omitted, the processing procedure of the antenna is greatly simplified, and therefore the production efficiency of the antenna can be improved and the cost can be reduced.

[0073] In addition, the plurality of radiation units 2, the transmission unit 3 and the feeding point 4 are integrally formed on the same side of the substrate 1 by a printing process, since the welding process is omitted, for different antennas, the connection positions of the radiation unit 2 and the transmission unit 3 will not be different due to the occurrence of miswelding, the consistency of the positions of the components in the antenna can be improved, and therefore the yield of the antenna can be improved.

[0074] In some possible embodiments, the plurality of radiation units 2 includes a first radiation unit 21, a second radiation unit 22 and a third radiation unit 23 arranged at intervals, the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 are all dipole radiation units. The first radiation unit 21 includes a first arm 211 and a second arm 212, the second radiation unit 22 includes a third arm 221 and a fourth arm 222, and the third radiation unit 23 includes a fifth arm 231 and a sixth arm 232.

[0075] As shown in Figure 1 The substrate 1 is an elongated rectangular thin plate structure, the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 are located on the same side of the substrate 1, and the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 are arranged at intervals along the length direction of the substrate 1. In the first radiation unit 21, the first arm 211 and the second arm 212 are arranged at intervals along the length direction of the substrate 1. In the second radiation unit 22, the third arm 221 and the fourth arm 222 are arranged at intervals along the length direction of the substrate 1. In the third radiation unit 23, the fifth arm 231 and the sixth arm 232 are arranged at intervals along the length direction of the substrate 1.

[0076] Optionally, the sizes of the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 in the width direction of the substrate 1 can be equal and smaller than the width of the substrate 1. In this way, the edges of the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 can be prevented from extending out of the substrate 1, and the overall strength of the antenna can be improved.

[0077] Optionally, the first radiation unit 21, the second radiation unit 22 and the third radiation unit 23 can be arranged centrally in the width direction of the substrate 1, respectively. In this way, the symmetry of the antenna can be improved.

[0078] In some examples, the transmission unit 3 includes a first transmission line 31, a second transmission line 32 and a third transmission line 33.

[0079] As shown in Figure 2 The transmission unit 3 includes a first transmission line 31, a second transmission line 32 and a third transmission line 33. The first transmission line 31 is used to electrically connect the first radiating unit 21 and the feed point 4, the second transmission line 32 is used to electrically connect the first radiating unit 21 and the second radiating unit 22, and the third transmission line 33 is used to electrically connect the second radiating unit 22 and the third radiating unit 23.

[0080] Specifically, the two ends of the first transmission line 31 are connected with the first arm 211 and the feed point 4 respectively to realize the electrical connection between the first arm 211 and the feed point 4. The two ends of the second transmission line 32 are connected with the second arm 212 and the third arm 221 respectively to realize the electrical connection between the second arm 212 and the third arm 221. The two ends of the third transmission line 33 are connected with the fourth arm 222 and the fifth arm 231 respectively to realize the electrical connection between the fourth arm 222 and the fifth arm 231. The sixth arm 232 is used for grounding.

[0081] Further, referring to Figure 2 The antenna further includes a coaxial line 5, one end of the inner wire of the coaxial line 5 is electrically connected with the feed point 4 through a solder pad, and the other end is electrically connected with an external circuit. One end of the outer wire of the coaxial line 5 is electrically connected with the sixth arm 232 through a solder pad, and the other end is grounded.

[0082] The external circuit includes a radio frequency circuit and a matching circuit. The input end of the radio frequency circuit is electrically connected with a chip in the router, the output end of the radio frequency circuit is electrically connected with the input end of the matching circuit, and the output end of the matching circuit is electrically connected with the inner wire of the coaxial line 5.

[0083] In implementation, the electrical signal emitted by the chip passes through the radio frequency circuit and the matching circuit in turn, enters the antenna interior through the feed point 4 via the inner wire of the coaxial line 5, and then enters the first arm 211 via the first transmission line 31. In the first arm 211, the alternating current emits electromagnetic waves outward according to the principle of electromagnetic induction, which are received by the external antenna and also received by the second arm 212, that is, the first arm 211 forms an alternating current in the second arm 212 through space radiation. In the second arm 212, the alternating current enters the third arm 221 through the second transmission line 32. In the third arm 221, the alternating current emits electromagnetic waves outward according to the principle of electromagnetic induction, which are received by the external antenna and also received by the fourth arm 222, that is, the third arm 221 forms an alternating current in the fourth arm 222 through space radiation. In the fourth arm 222, the alternating current enters the fifth arm 231 through the third transmission line 33. In the fifth arm 231, the alternating current emits electromagnetic waves outward according to the principle of electromagnetic induction, which are received by the external antenna and also received by the sixth arm 232, that is, the fifth arm 231 forms an alternating current in the sixth arm 232 through space radiation. In the sixth arm 232, the alternating current flows to the ground through the outer wire of the coaxial line 5, forming a complete loop.

[0084] In some examples, the second arm 212, the third arm 221, the fourth arm 222 and the fifth arm 231 each include two branch arms. As shown, the second arm 212 includes a first branch arm 2121 and a second branch arm 2122, the third arm 221 includes a third branch arm 2211 and a fourth branch arm 2212, the fourth arm 222 includes a fifth branch arm 2221 and a sixth branch arm 2222, and the fifth arm 231 includes a seventh branch arm 2311 and an eighth branch arm 2312. Figure 2

[0085] Optionally, the first branch arm 2121 and the second branch arm 2122 are spaced apart on both sides of the first transmission line 31, the third branch arm 2211 and the fourth branch arm 2212 are spaced apart on both sides of the first transmission line 31, the fifth branch arm 2221 and the sixth branch arm 2222 are spaced apart on both sides of the first transmission line 31, and the seventh branch arm 2311 and the eighth branch arm 2312 are spaced apart on both sides of the first transmission line 31.

[0086] With the technical solutions shown in the present application, the second arm 212, the third arm 221, the fourth arm 222 and the fifth arm 231 each include two branch arms, and the two branch arms of the same arm are spaced apart on both sides of the first transmission line 31. This is equivalent to that the second arm 212, the third arm 221, the fourth arm 222 and the fifth arm 231 each have a space for mounting the first transmission line 31 in the middle, see Figure 9 ​Compared with the scheme of connecting multiple radiation units by setting coaxial lines in the related art, the setting of the avoiding space can make the first transmission line 31 not necessarily be arranged above the multiple radiation units 2, but make the first transmission line 31 and the multiple radiation units 2 be located in the same plane, so that the overall thickness of the antenna can be reduced, and the miniaturization design of the antenna and the wireless device is facilitated.

[0087] Optionally, the first branch arm 2121 and the second branch arm 2122 can be symmetrically distributed on two sides of the first transmission line 31, the third branch arm 2211 and the fourth branch arm 2212 can be symmetrically distributed on two sides of the first transmission line 31, the fifth branch arm 2221 and the sixth branch arm 2222 can be symmetrically distributed on two sides of the first transmission line 31, and the seventh branch arm 2311 and the eighth branch arm 2312 can be symmetrically distributed on two sides of the first transmission line 31.

[0088] In this way, the antenna can have good directivity, and the wiring of the antenna can be more neat.

[0089] In some examples, the second transmission line 32 and the third transmission line 33 each include two sub-transmission lines, and each sub-transmission line is used to be connected with two branch arms adjacent to each other and located on the same side of the first transmission line 31.

[0090] As shown in Figure 2 the second transmission line 32 includes a first sub-transmission line 321 and a second sub-transmission line 322, the first sub-transmission line 321 is electrically connected with the first branch arm 2121 and the third branch arm 2211 respectively, and the second sub-transmission line 322 is electrically connected with the second branch arm 2122 and the fourth branch arm 2212 respectively; the third transmission line 33 includes a third sub-transmission line 331 and a fourth sub-transmission line 332, the third sub-transmission line 331 is electrically connected with the fifth branch arm 2221 and the seventh branch arm 2311 respectively, and the fourth sub-transmission line 332 is electrically connected with the sixth branch arm 2222 and the eighth branch arm 2312 respectively.

[0091] In one example, the first arm 211, the first transmission line 31 and the feeding point 4 are integrally formed on the same side of the substrate 1, the first branch arm 2121, the second branch arm 2122, the third branch arm 2211, the fourth branch arm 2212, the first sub-transmission line 321 and the second sub-transmission line 322 are integrally formed on the same side of the substrate 1, the fifth branch arm 2221, the sixth branch arm 2222, the seventh branch arm 2311, the eighth branch arm 2312, the third sub-transmission line 331 and the fourth sub-transmission line 332 are integrally formed on the same side of the substrate 1, and the sixth arm 232 is integrally formed on the same side of the substrate 1.

[0092] Further, referring to Figure 2The first arm 211 comprises a ninth branch arm 2111, a tenth branch arm 2112 and a first connecting part 2113. Two ends of the first connecting part 2113 are connected to the ninth branch arm 2111 and the tenth branch arm 2112 respectively. The middle part of the first connecting part 2113 is connected to one end of the first transmission line 31. The ninth branch arm 2111, the tenth branch arm 2112, the first connecting part 2113, the first transmission line 31 and the feeding point 4 are integrally formed on the same side of the substrate 1. In this way, the processing procedure of the antenna can be simplified, so that the production efficiency is improved and the processing cost of the antenna is reduced.

[0093] Further, referring to Figure 2 The sixth arm 232 comprises an eleventh branch arm 2321, a twelfth branch arm 2322 and a second connecting part 2323. Two ends of the second connecting part 2323 are connected to the eleventh branch arm 2321 and the twelfth branch arm 2322 respectively. The second connecting part 2323 has an avoiding space for accommodating the feeding point 4. In this way, the wiring of the antenna can be more compact, which is beneficial to the miniaturization design of the antenna.

[0094] In some examples, the distance between the first arm 211 and the second arm 212 is within a first interval, the distance between the second arm 212 and the third arm 221, and the distance between the fourth arm 222 and the fifth arm 231 are within a second interval, and the distance between the third arm 221 and the fourth arm 222, and the distance between the fifth arm 231 and the sixth arm 232 are within a third interval.

[0095] The first interval is [2.2mm, 3.8mm], the second interval is [0.6mm, 2.8mm], and the third interval is [0.2mm, 2.0mm].

[0096] Exemplarily, referring to Figure 3 The distance between the first arm 211 and the second arm 212 is 3.4mm, the distance between the second arm 212 and the third arm 221, and the distance between the fourth arm 222 and the fifth arm 231 are both 2.1mm, and the distance between the third arm 221 and the fourth arm 222, and the distance between the fifth arm 231 and the sixth arm 232 are both 1.4mm.

[0097] By reasonably setting the distance between the plurality of radiation units and the distance between the two arms in each radiation unit, the impedance can be improved, the radiation efficiency of the radiation unit can be improved, the electromagnetic waves radiated by adjacent radiation units can be superimposed and enhanced in the far field, and thus the performance of the antenna can be improved.

[0098] In some possible embodiments, the first radiating unit 21 and the third radiating unit 23 are dual-frequency radiating units, and the two operating frequency bands of the first radiating unit 21 and the third radiating unit 23 are the same. The second radiating unit 22 is a single-frequency radiating unit, and the operating frequency band of the second radiating unit 22 is any one of the two operating frequency bands of the first radiating unit 21.

[0099] Exemplarily, the two operating frequency bands of the first radiating unit 21 and the third radiating unit 23 can each be 2.4 GHz and 5 GHz, and the operating frequency of the second radiating unit 22 can be 5 GHz. The first radiating unit 21 is a dipole radiating unit, which includes a first arm 211 and a second arm 212. In the following, the specific structure of the first arm 211 is introduced, and the structure of the second arm 212 can refer to the specific structure of the first arm 211.

[0100] Specifically, referring to FIG. 2, Figure 4 the first arm 211 includes a ninth branch arm 2111, a tenth branch arm 2112, and a first connecting part 2113. The ninth branch arm 2111 includes a first stub 21111 and a second stub 21112, and the tenth branch arm 2112 includes a third stub 21121 and a fourth stub 21122. The first stub 21111 and the third stub 21121 are used for transmitting or receiving radio frequency signals in the 2.4 GHz frequency band, and the second stub 21112 and the fourth stub 21122 are used for transmitting or receiving radio frequency signals in the 5 GHz frequency band. The length of the first stub 21111 is greater than the length of the second stub 21112, and the length of the third stub 21121 is greater than the length of the fourth stub 21122.

[0101] Optionally, the first stub 21111 and the third stub 21121 can be relatively symmetrical about the neutral plane of the antenna, and the second stub 21112 and the fourth stub 21122 can be relatively symmetrical about the neutral plane of the antenna. The neutral plane of the antenna is a plane perpendicular to the substrate 1 and having equal distances to both ends in the width direction of the substrate 1. In this way, the antenna can have good directivity.

[0102] The structure of the third radiating unit 23 can refer to the description of the first radiating unit 21 above, which is not repeated here.

[0103] Referring to simulation data, for the antenna shown in FIG. 2, Figure 1 FIG. 3 shows the radiation pattern related to the azimuth angle of the antenna in the 2.4 GHz frequency band, i.e., the dipole azimuth plane pattern in the 2.4 GHz frequency band, Figure 5 FIG. 4 shows the radiation pattern related to the elevation angle of the antenna in the 2.4 GHz frequency band, i.e., the dipole elevation plane pattern in the 2.4 GHz frequency band. Referring to FIG. 3 and FIG. 4, Figure 6 and Figure 5 FIG. 5 shows the radiation pattern related to the azimuth angle of the antenna in the 5 GHz frequency band, i.e., the dipole azimuth plane pattern in the 5 GHz frequency band, Figure 6 and FIG. 6 shows the radiation pattern related to the elevation angle of the antenna in the 5 GHz frequency band, i.e., the dipole elevation plane pattern in the 5 GHz frequency band.​​​​​​​​​​It can be seen that the antenna has good gain at the 2.4GHz frequency band. Figure 1 The antenna is shown, Figure 7 The antenna is shown at the 5GHz frequency band, the radiation pattern related to the azimuth angle, i.e. the dipole azimuth plane pattern at the 5GHz frequency band, Figure 8 The antenna is shown at the 5GHz frequency band, the radiation pattern related to the elevation angle, i.e. the dipole elevation plane pattern at the 5GHz frequency band. It can be seen that the antenna has good gain at the 5GHz frequency band. Figure 7 And Figure 8 It can be seen that the antenna has good gain at the 2.4GHz frequency band.

[0104] In some possible examples, the top surfaces of the plurality of radiating units 2, the transmission unit 3 and the feeding point 4 are located in the same plane, and the top surface is a wall surface away from the substrate 1.

[0105] By using the technical solutions shown in the present application, the plurality of radiating units 2, the transmission unit 3 and the feeding point 4 are integrally formed on the same side of the substrate 1, and the wall surfaces of the plurality of radiating units 2, the transmission unit 3 and the feeding point 4 away from the substrate 1 are located in the same plane, so that the antenna as a whole is relatively flat, and the antenna is more suitable for being arranged in a narrow space, and the arrangement flexibility of the antenna can be improved.

[0106] The present application also provides a wireless device, which can be a router. The router comprises the antenna described above. The router can comprise a plurality of antennas, for example, two or three, or more antennas described above.

[0107] The above description is only one of the embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna, characterized in that, The antenna includes a substrate (1), multiple radiating elements (2), a transmission element (3), and a feed point (4); The plurality of radiating units (2) are used to transmit or receive radio frequency signals; The transmission unit (3) is electrically connected to the feed point (4) and the plurality of radiation units (2), respectively; The plurality of radiating units (2), the transmission unit (3) and the feed point (4) are integrally formed on the same side of the substrate (1).

2. The antenna according to claim 1, characterized in that, The plurality of radiation units (2) include a first radiation unit (21), a second radiation unit (22) and a third radiation unit (23) distributed at intervals, wherein the first radiation unit (21), the second radiation unit (22) and the third radiation unit (23) are all dipole radiation units.

3. The antenna according to claim 2, characterized in that, The transmission unit (3) includes a first transmission line (31), a second transmission line (32) and a third transmission line (33). The first transmission line (31) is electrically connected to the first arm (211) of the first radiation unit (21) and the feed point (4), respectively. The second transmission line (32) is electrically connected to the second arm (212) of the first radiation unit (21) and the third arm (221) of the second radiation unit (22), respectively. The third transmission line (33) is electrically connected to the fourth arm (222) of the second radiation unit (22) and the fifth arm (231) of the third radiation unit (23), respectively. The sixth arm (232) of the third radiation unit (23) is used for grounding.

4. The antenna according to claim 3, characterized in that, The second arm (212) includes a first arm (2121) and a second arm (2122), which are spaced apart on both sides of the first transmission line (31); The third arm (221) includes a third branch arm (2211) and a fourth branch arm (2212), which are spaced apart on both sides of the first transmission line (31); The fourth arm (222) includes a fifth arm (2221) and a sixth arm (2222), which are spaced apart on both sides of the first transmission line (31); The fifth arm (231) includes a seventh arm (2311) and an eighth arm (2312), which are spaced apart on both sides of the first transmission line (31).

5. The antenna according to claim 4, characterized in that, The second transmission line (32) includes a first sub-transmission line (321) and a second sub-transmission line (322). The first sub-transmission line (321) is electrically connected to the first arm (2121) and the third arm (2211) respectively. The second sub-transmission line (322) is electrically connected to the second arm (2122) and the fourth arm (2212) respectively. The third transmission line (33) includes a third sub-transmission line (331) and a fourth sub-transmission line (332). The third sub-transmission line (331) is electrically connected to the fifth arm (2221) and the seventh arm (2311) respectively, and the fourth sub-transmission line (332) is electrically connected to the sixth arm (2222) and the eighth arm (2312) respectively.

6. The antenna according to claim 3, characterized in that, The distance between the first arm (211) and the second arm (212) lies within a first interval, which is [2.2mm, 3.8mm]. The distance between the second arm (212) and the third arm (221), and the distance between the fourth arm (222) and the fifth arm (231) are both within the second interval, which is [0.6mm, 2.8mm]. The distance between the third arm (221) and the fourth arm (222), and the distance between the fifth arm (231) and the sixth arm (232) are both within a third interval, which is [0.2mm, 2.0mm].

7. The antenna according to claim 2, characterized in that, The first radiation unit (21) and the third radiation unit (23) are dual-frequency radiation units, and the two operating frequency bands of the first radiation unit (21) and the third radiation unit (23) are the same; The second radiation unit (22) is a single-frequency radiation unit, and the operating frequency band of the second radiation unit (22) is either of the two operating frequency bands.

8. The antenna according to claim 7, characterized in that, The first radiation unit (21) and the third radiation unit (23) are distributed on both sides of the second radiation unit (22).

9. The antenna according to any one of claims 1 to 8, characterized in that, The top surfaces of the plurality of radiating units (2), the transmission unit (3) and the feed point (4) are located in the same plane, and the top surface is a wall surface away from the substrate (1).

10. A wireless device, characterized in that, The wireless device includes the antenna as described in any one of claims 1 to 9.

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