Antenna and electronic device

Abstract

The application relates to an antenna and an electronic device, the antenna comprising an antenna unit working at a first frequency band, the antenna unit comprising a plurality of radiators arranged in sequence along a first direction, a pixelated region being arranged between adjacent radiators, the pixelated region being used for configuring a current path between the connected radiators, whether a conductor is arranged in different pixels / grids in the pixelated region being encoded and optimized through an algorithm, so that the design and optimization of the antenna are simplified; in addition, a decoupling unit electrically coupled with a feeding point is further arranged, the decoupling unit being used for suppressing the standing wave of the antenna unit working at the first frequency band at a second frequency band, reducing the mutual interference between the antenna unit and an antenna working at the second frequency band, and improving the isolation and communication quality between each other.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, and in particular relates to an antenna and electronic device. Background Technology

[0002] With the development of mobile communication technology, new-generation communication equipment needs to be backward compatible with traditional standards such as 2.4G / 3G / 4G, enabling multi-band collaborative operation. This multi-band coexistence scenario presents severe challenges to antenna systems. For example, when the harmonics of a 2.4G antenna are close to the operating frequency of a 5G antenna, the mutual coupling between antennas will significantly degrade receiver sensitivity, leading to increased bit error rate and decreased communication quality. Currently, two common solutions are used to mitigate inter-frequency interference: physical isolation: optimizing antenna layout by increasing antenna spacing or adding electromagnetic bandgap structures, but this increases equipment size and cost. Out-of-band suppression: adding filters / duplexers to the RF front end, but this increases link insertion loss and only improves port isolation without solving the radiation pattern distortion problem caused by electromagnetic coupling between multi-frequency antennas. Utility Model Content

[0003] The purpose of this application is to provide an antenna and electronic device that aims to solve the problem of insufficient isolation in traditional multi-band antenna systems.

[0004] In a first aspect, embodiments of this application provide an antenna, including an antenna element operating in a first frequency band;

[0005] The antenna unit includes a plurality of radiators spaced apart along a first direction, a pixelated region located between two adjacent radiators, a feed point disposed on a first radiator, and a decoupling unit electrically coupled to the feed point.

[0006] Wherein, the first radiator is any one of the plurality of radiators, the pixelated region is used to configure current paths between the connected radiators, and the decoupling unit is used to suppress the standing wave of the antenna unit in the second frequency band.

[0007] In some embodiments, the pixelated region includes a plurality of grids arranged in an array for filling conductors, wherein a portion of the plurality of grids is provided with conductors to form current guides for folding reverse current in the first direction.

[0008] In some embodiments, the first radiator includes a first oscillator arm and a second oscillator arm arranged at intervals along the first direction, and the feed point is located between the first oscillator arm and the second oscillator arm; the feed point includes a core wire pad and an outer conductor pad, the outer conductor pad is connected to the first oscillator arm and is used to establish an electrical connection with the outer conductor of the coaxial line, the core wire pad is disposed on the second oscillator arm, and the core wire pad is used to establish an electrical connection with the core wire of the coaxial line.

[0009] In some embodiments, the first radiator is the first radiator along the first direction.

[0010] In some embodiments, the decoupling unit includes an open stub that is electrically connected to the outer conductor pad of the feed point.

[0011] In some embodiments, the open-circuit stub includes a first stub and a second stub, the first stub and the second stub being connected to the outer conductor pad of the feed point, and being located on opposite sides of the first radiator.

[0012] In some embodiments, the electrical lengths of the first stub and the second stub in the second frequency band correspond to 1 / 4 wavelength.

[0013] In some embodiments, the electrical lengths of the first stub and the second stub in the first frequency band correspond to half a wavelength.

[0014] In some embodiments, the decoupling unit includes a slot formed on a first radiator, the slot being electrically coupled to the feed point.

[0015] In some embodiments, the slotting includes a first slot and a second slot, the first slot being formed on the first vibrator arm and the second slot being formed on the second vibrator arm, the first slot and the second slot being respectively located near the feed point.

[0016] In some embodiments, the first slot and the second slot are U-shaped slots, with the bottom of the first slot and the bottom of the second slot facing away from the power supply point, respectively.

[0017] In some embodiments, the electrical lengths of the first slot and the second slot in the second frequency band correspond to half a wavelength.

[0018] In some embodiments, the first vibrator arm is a U-shaped or H-shaped structure with its opening located in the first direction, and its length in the first direction corresponds to 1 / 4 wavelength of the first frequency band.

[0019] In some embodiments, the system further includes multiple pairs of parasitic segments, each pair of parasitic segments being located on opposite sides of a pixelated region, and the length of each parasitic segment in the first direction corresponding to half the wavelength of the first frequency band.

[0020] Secondly, embodiments of this application provide another antenna including a first antenna element operating in a first frequency band and a second antenna element operating in a second frequency band;

[0021] The first antenna element includes a plurality of first radiating portions arranged at intervals along a first direction, a first pixelated region located between two adjacent first radiating portions, a first feed point disposed on a first sub-radiating portion, and an open-circuit stub coupled to the first feed point; wherein, the first sub-radiating portion is any one of the plurality of first radiating portions, the first pixelated region is used to configure a current path between the connected first radiating portions, and the open-circuit stub is used to suppress the standing wave ratio of the first antenna element in a second frequency band.

[0022] The second antenna element includes a plurality of second radiating portions arranged at intervals along a third direction, a second pixelated region located between two adjacent second radiating portions, a second feed point disposed on a second sub-radiating portion, and a slot formed in the second sub-radiating portion; wherein the second sub-radiating portion is any one of the plurality of second radiating portions, the second pixelated region is used to configure a current path between the connected second radiating portions, and the slot is used to suppress the standing wave of the second antenna element in a first frequency band.

[0023] In some embodiments, a substrate is included, on which the antenna is formed.

[0024] Thirdly, embodiments of this application provide an electronic device including the antenna described above.

[0025] The beneficial effects of this application embodiment compared with related technologies are as follows: the antenna element includes multiple radiators arranged sequentially along a first direction, and a pixelated region is provided between adjacent elements. The pixelated region is used to configure current paths between the connected radiators. By using algorithm encoding and optimization to determine whether conductors are provided in different pixels / grids in the pixelated region, the design and optimization of the antenna are simplified. In addition, a decoupling unit electrically coupled to the feed point is provided. The decoupling unit is used to suppress the standing wave of the antenna element operating in the first frequency band in the second frequency band, reduce the mutual interference between the antenna element and the antenna operating in the second frequency band, and improve the isolation and communication quality between them. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the antenna structure provided in one embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the antenna structure provided in one embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a dual antenna provided in one embodiment of this application;

[0029] Figure 4 Impedance curves of a 5G antenna and a prior art 5G antenna are provided for one embodiment of this application;

[0030] Figure 5 This application provides S-parameter curves of a 5G antenna and a prior art 5G antenna for one embodiment of the present application;

[0031] Figure 6 This application provides a horizontal average gain curve of a 5G antenna compared to a prior art 5G antenna in one embodiment;

[0032] Figure 7 S-parameter curves of a 2.4G antenna and a prior art 2.4G antenna are provided for one embodiment of this application;

[0033] Figure 8 The present application provides a horizontal average gain curve of a 2.4G antenna compared with that of a prior art 2.4G antenna in one embodiment of the present application;

[0034] Figure 9 This application provides S-parameter curves for a 2.4G antenna and a 5G antenna placed side-by-side with a 60mm spacing, according to one embodiment of the present application. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] One embodiment of this application proposes a rod-shaped high-gain omnidirectional antenna for home routers based on a pixel antenna method. By using a reasonable antenna mesh / pixelation layout, antenna performance is improved, enhancing antenna design and tuning efficiency. Furthermore, an antenna tuning method suitable for high-gain pixel antennas is proposed.

[0040] Please see Figure 1 and Figure 2 One embodiment of this application proposes an antenna including an antenna element 10 operating in a first frequency band. The antenna element 10 includes a plurality of radiators 11i arranged at intervals along a first direction x, a pixelated region 102 located between two adjacent radiators 11i, a feed point 13 disposed on a first radiator 11a, and a decoupling unit 14 electrically coupled to the feed point 13, wherein i takes values ​​a, b, c, d, ...

[0041] The first radiator 11a is any one of the plurality of radiators 11i, the pixelated region 102 is used to configure current paths between the connected radiators 11i, and the decoupling unit 14 is used to suppress the standing wave of the antenna unit 10 in the second frequency band.

[0042] In this embodiment, the pixelated region 102 can be configured by algorithmically editing whether its pixels (or grids) are filled with conductors to configure the current path between two adjacent radiators 11i, thereby introducing more current operating modes. Through this convenient tuning and design method, the antenna performance can be improved. However, because the pixelated region 102 can use different current paths, it may cause the antenna element 10 operating in the first frequency band (e.g., 5G) to also resonate in the second frequency band (e.g., 2.4G) with a very low standing wave ratio (deep resonant point). This can lead to mutual interference between the antenna element 10 and surrounding antennas in the second frequency band in this embodiment, resulting in poor inter-frequency isolation in the second frequency band and thus affecting communication quality. Therefore, by adding a decoupling unit 14 electrically coupled to the feed point 13, the direction or distribution of the current (hereinafter referred to as the standing wave current) that excites the second frequency band radiation is changed near the feed point 13, thereby reducing the coupling of the standing wave current to the antenna element 10 and thus forming resonance in the second frequency band. This suppresses the standing wave near the second frequency band and ultimately improves the isolation between the antenna element 10 operating in the first frequency band and the antenna operating in the second frequency band.

[0043] In some embodiments, the decoupling unit 14 changes the direction or distribution of the standing wave current near the feed point 13. This can be achieved by directly short-circuiting the standing wave current to ground through the decoupling unit 14, or by changing the current distribution of the standing wave current in the first radiator 11a through the decoupling unit 14 to reduce the excitation of radiation in the second frequency band.

[0044] In some embodiments, the power supply point 13 includes a core wire pad 131 and an outer conductor pad 132. The core wire pad 131 is used to establish an electrical connection with the core wire of the coaxial cable, and the outer conductor pad 132 is used to establish an electrical connection with the outer conductor of the coaxial cable.

[0045] Please see Figure 1 In some embodiments, the decoupling unit 14 includes an open stub 141 connected to the core pad 131 of the feed point 13. Utilizing the characteristic that the input of the open stub 141 is equivalent to a short circuit, the core pad 131 is effectively short-circuited to ground near the second frequency band. That is, the potentials of the core pad 131 and the outer conductor pad 132 are the same, preventing the signal input of the standing wave current, thereby suppressing the standing wave near the second frequency band and improving isolation.

[0046] Please see Figure 2 In some embodiments, the decoupling unit 14 includes a slot 142 formed on the first radiator 11a. The slot 142 is electrically coupled to the feed point 13, which changes the original current distribution of the first radiator 11a and thus suppresses the standing wave in the first frequency band, improving the isolation.

[0047] In some embodiments, the antenna element 10 resonates in a first frequency band, which includes a plurality of consecutive sub-frequency bands, and the plurality of radiators 11i resonate in the plurality of sub-frequency bands respectively. In some embodiments, the dimensions of each radiator 11i along a first direction x are not equal, the dimensions of each radiator 11i along a second direction y are not equal, and the first direction x and the second direction y are perpendicular to each other.

[0048] Figure 1 In the example, the antenna is formed on the substrate 101. The lengths (i.e., the dimensions along the first direction x) of the first radiator 11a, the second radiator 11b, the third radiator 11c, and the fourth radiator 11d are not equal, and the widths (i.e., the dimensions along the second direction y) are not equal. The above length and width parameters are optimized and configured by an algorithm to make the size parameters of different radiators 11i different, which helps to reduce the reflection of antenna current during the conduction process between radiators 11i and improve the overall impedance matching performance of the antenna.

[0049] Figure 1Each of the radiators 11i in the example operates in the range of 5 GHz to 6 GHz, but their lengths correspond to the half-wavelengths of different frequencies within the same frequency band. For example, the length of the first radiator 11a corresponds to (approximately equal to) the half-wavelength of 5.15 GHz, the length of the second radiator 11b corresponds to the half-wavelength of 5.35 GHz, the length of the third radiator 11c corresponds to the half-wavelength of 5.75 GHz, and the length of the fourth radiator 11d corresponds to the half-wavelength of 5.85 GHz.

[0050] Figure 2 In the example, each radiator 11i operates in the range of 2.4 GHz to 2.497 GHz, but their lengths correspond to half-wavelengths at different frequencies within the same frequency band. For example, the length of the first radiator 11a corresponds to a half-wavelength of 2.42 GHz, and the length of the second radiator 11b corresponds to a half-wavelength of 2.49 GHz. In other embodiments, the number of radiators 11i in the antenna can be an integer greater than two.

[0051] In some embodiments, the first radiator 11a is a first radiator along the first direction x. In other embodiments, depending on the application scenario or installation space, the first radiator 11a can be any other one of a plurality of radiators 11i.

[0052] In some embodiments, the first radiator 11a includes a first oscillator arm 111 and a second oscillator arm 112 arranged at intervals along a first direction, and a feed point 13 is located between the first oscillator arm 111 and the second oscillator arm 112; an outer conductor pad 132 is connected to the first oscillator arm 111 and is used to establish an electrical connection with the outer conductor of the coaxial line; a core wire pad 131 is disposed on the second oscillator arm 112 and is used to establish an electrical connection with the core of the coaxial line.

[0053] In some embodiments, the first vibrator arm 111 is a U-shaped or H-shaped structure, with one opening located in the first direction x, and its length in the first direction x corresponding to 1 / 4 wavelength of the first frequency band. The U-shaped or H-shaped structure can act as a balun, which helps to balance the current intensity of the outer conductor in the coaxial line and reduce the influence of the coaxial line on the radiation of the antenna element 10.

[0054] The second transducer arm 112 is a closed polygon, and its length in the first direction x corresponds to a quarter wavelength of the operating frequency band. In this embodiment, the second transducer arm 112 is a rectangular copper-clad structure.

[0055] In some embodiments, the shapes of the radiators other than the first radiator 11a are all closed polygons. Figure 1 and Figure 2In the embodiments, the second, third, and fourth radiators 11b, 11c, and 11d are represented by rectangles. In some embodiments, the length of each radiator 11i in the first direction x corresponds to half the wavelength of the operating frequency band, so that the radiator 11i can resonate within the operating frequency band and radiate energy.

[0056] Please see Figure 1 In some embodiments, the open-circuit stub 141 includes a first stub 1411 and a second stub 1412, which are respectively connected to the core wire pad 131 of the feed point 13 and are located on opposite sides of the first radiator 11a. The electrical lengths of the first stub 1411 and the second stub 1412 in the second frequency band correspond to 1 / 4 wavelength. Utilizing the characteristic that the input terminals of the first stub 1411 and the second stub 1412, whose electrical lengths in the second frequency band are 1 / 4 wavelength, are equivalent to short circuits, the core wire pad 131 is equivalent to a short circuit to ground in the second frequency band. That is, the potentials of the core wire pad 131 and the outer conductor pad 132 are the same, which prevents the input of the standing wave current signal and thus suppresses the standing wave near the first frequency band.

[0057] Meanwhile, the electrical lengths of the first stub 1411 and the second stub 1412 in the first frequency band correspond to half a wavelength. Utilizing the characteristic that the input terminals of the first stub 1411 and the second stub 1412, at half a wavelength, are equivalent to open circuits, the inner core pad 131 is equivalent to an open-circuit device connected in parallel near the first frequency band, which will not have any effect on the core pad 131, and therefore will not affect the standing wave characteristics of the antenna element 10. For example, Figure 1 For a 5G antenna, the first stub 1411 and the second stub 1412 are used to suppress 2.4GHz standing waves.

[0058] In some embodiments, the first branch 1411 and the second branch 1412 are microstrip lines bent around the outside of the first oscillator arm 111. The bending shape can be set according to the size of the substrate 101 and the miniaturization requirements, for example, it can be set around the outside of the second oscillator arm 112. Figure 1 In the example, the first branch 1411 and the second branch 1412 are bent into semi-rectangles, and the first branch 1411 and the second branch 1412 enclose the first oscillator arm 111.

[0059] Please see Figure 2In some embodiments, the slot 142 includes a first slot 1421 and a second slot 1422. The first slot 1421 is formed on the first vibrator arm 111, and the second slot 1422 is formed on the second vibrator arm 112. The first slot 1421 and the second slot 1422 are respectively located near the feed point 13 to change the current distribution near the feed point 13. The first slot 1421 and the second slot 1422 have an electrical length corresponding to half the wavelength in the second frequency band, changing the original current distribution pattern on the first radiator 11a and thus suppressing the standing wave in the second frequency band. For example, Figure 2 For a 2.4G antenna, the first slot 1421 and the second slot 1422 are used to suppress 5GHz standing waves.

[0060] In some embodiments, the first slot 1421 and the second slot 1422 are U-shaped slots 142, with the bottom of the first slot 1421 and the bottom of the second slot 1422 facing away from the feed point 13, respectively. In other embodiments, the shapes of the first slot 1421 and the second slot 1422 can be configured into other shapes according to the shape arrangement of the first radiator 11a, such as H-shaped slots, cross-shaped slots, etc., provided that the electrical length in the second frequency band corresponds to 1 / 2 wavelength.

[0061] In some embodiments, to further enhance the antenna gain, the antenna element 10 further includes a pair of parasitic stubs 15, each located on opposite sides of a pixelated region 102, with the length of each parasitic stub 15 in a first direction corresponding to half the wavelength of a first frequency band. The parasitic stubs 15 are used to induce an induced current that is opposite to the current in the pixelated region 102 and in the same direction as the radiator current, thereby enhancing the antenna gain by fine-tuning the current distribution on the substrate 101.

[0062] In some embodiments, in order to maintain the omnidirectional radiation characteristics of the pixel antenna, the first stub 1411 and the second stub 1412, and each pair of parasitic stubs 15 are placed symmetrically along a first direction.

[0063] In some embodiments, the pixelated region 102 includes a plurality of grids (i.e., pixels) arranged in an array for filling conductors. A portion of these grids is provided with conductors to form current guiding sections. These current guiding sections are used to fold reverse currents in a first direction, causing the unidirectional currents radiated in the radiator to superimpose in the far-field region, thereby achieving high gain. When the antenna is disposed on the substrate 101, the filling conductor can be copper-clad. When the antenna is a standalone antenna, the conductor can be a copper sheet or an aluminum sheet, etc.

[0064] In some embodiments, the pixelated region 102 is pixelated using a gridding method, with 0 / 1 bits used to characterize whether different grids in the pixelated region 102 contain conductors. For example, this can be based on copper plating on the circuit board 101. An algorithm is used to optimize the bit sequence describing the pixelated region 102 to improve antenna performance.

[0065] Please refer to Figure 3 This application embodiment also provides another antenna, which is provided with a first antenna element 20 operating in a first frequency band and a second antenna element 30 operating in a second frequency band.

[0066] The first antenna element 20 includes a plurality of first radiating portions 21i arranged at intervals along a first direction x, a first pixelated region 202 located between two adjacent first radiating portions 21i, a first feed point 23 disposed on a first sub-radiating portion 21a, and an open-circuit stub 24 coupled to the first feed point 23; wherein, the first sub-radiating portion 21a is any one of the plurality of first radiating portions 21i, the first pixelated region 202 is used to configure current paths between the connected first radiating portions 21i, and the open-circuit stub 24 is used to suppress the standing wave ratio of the first antenna element 20 in the second frequency band;

[0067] The second antenna element 30 includes a plurality of second radiating portions 31i arranged at intervals along a third direction, a second pixelated region 302 located between two adjacent second radiating portions 31i, a second feed point 33 disposed on a second sub-radiating portion 31a, and a slot 34 formed on the second sub-radiating portion 31a; wherein the second sub-radiating portion 31a is any one of the plurality of second radiating portions 31i, the second pixelated region 302 is used to configure current paths between the connected second radiating portions 31i, and the slot 34 is used to suppress the standing wave of the second antenna element 30 in the first frequency band.

[0068] Wherein, the third direction is the first direction x, but it can also be any other direction. It is understood that more specific embodiments of the first antenna element 20 and the second antenna element 30 can be found in the description of the embodiment of antenna element 10 described above, and will not be repeated here. Figure 3 In the example, the first frequency band and the second frequency band are the 2.4 GHz band and the 5 GHz band, respectively. The radiators 21i and 31i in the first antenna element 20 and the second antenna element 30 correspond to... Figure 1 , Figure 2 The radiator 11i in the antenna element 10 is shown. The first sub-radiator 21a in the first antenna element 20 and the second sub-radiator 31a in the second antenna element 30 correspond to... Figure 1 , Figure 2 The first radiator 11a in the antenna element 10 shown.

[0069] The antenna in this application embodiment can be applied to any communication electronic device, such as a routing device, a panel (access point, wireless access point) device, etc.

[0070] The antenna proposed in this application embodiment loads an open stub 24 on the wire core pad 231 of the first antenna element 20 to suppress VSWR in the 2.4G band, and opens a U-shaped slot 34 on the radiator of the second antenna element 30 to suppress VSWR in the 5G band. Parasitic stubs 25 and 35 are loaded in the pixelated regions 202 and 302 to further improve the antenna gain. Compared with a dual antenna system with a spacing of 60mm that does not implement the above technology, the inter-frequency isolation of the 2.4G band is improved by up to 8dB, the inter-frequency isolation of the 5G band is improved by up to 25dB, the gain of the 5G antenna (e.g., the first antenna element 20) is increased by more than 0.1dB, and the gain of the 2.4G antenna (e.g., the second antenna element 30) is increased by about 0.15dB.

[0071] Figure 4 Impedance curves for 5G antennas with and without open-circuit stub 24 are presented. The green line represents the impedance curves of 5G Band1 and 5G Band2 without open-circuit stub 24, while the red line represents the impedance curves of 5G Band1 and 5G Band2 with open-circuit stub 24. It can be seen that near the 2.4GHz band, the real part of the impedance of the 5G antenna with open-circuit stub 24 is 0, which is the effect achieved by using the 1 / 4 wavelength open-circuit stub 24. Meanwhile, the impedance in the 5G band remains essentially unchanged because the input of the 1 / 2 wavelength open-circuit stub 24 is equivalent to an open circuit, having no effect on the original impedance.

[0072] To more intuitively understand the standing wave suppression effect, Figure 5 The S-parameter curves of the 5G antenna with and without the open stub 24 are presented. The green line represents the S-parameter curve of the 5G pixel antenna without the open stub 24, and the red line represents the S-parameter curve of the 5G antenna with the open stub 24. It can be seen that after adding the open stub 24, the standing wave ratio (SWR) near the 2.4 GHz band is significantly suppressed, while the SWR in the 5G band is basically unaffected.

[0073] Figure 6 The average gain curves in the yoz plane for the 5G antenna with and without parasitic stub 25 are presented. The green line represents the average gain curve in the yoz plane for the 5G antenna without the open stub 24, while the red line represents the average gain curve in the yoz plane for the 5G antenna with the open stub 24. It can be seen that after adding parasitic stub 25, the average gain of 5G Band1 and 5G Band2 is further improved by approximately 0.15 dB (approaching the performance limit).

[0074] Figure 7 The S-parameter curves are presented before and after etching two U-shaped slots 34 on the two vibrator arms 311 and 312 of the second sub-radiator 31a of the 2.4G antenna. The green line represents the S-parameter curve of the 2.4G antenna without the U-shaped slots 34, and the red line represents the S-parameter curve of the 2.4G antenna with the U-shaped slots 34. It can be seen that the standing wave ratio (SWR) of the 2.4G antenna in the 5G band is effectively suppressed after etching the U-shaped slots 34.

[0075] Figure 8 The average gain curves in the horizontal plane (yoz plane) for the 2.4G antenna with and without the U-shaped slot 34 are presented. The green line represents the average gain curve in the horizontal plane (yoz plane) of the 2.4G antenna without the U-shaped slot 34, and the red line represents the average gain curve in the horizontal plane (yoz plane) of the 2.4G antenna with the U-shaped slot 34. It can be seen that after adding the U-shaped slot 34, the average gain of the 2.4G band is further improved by more than 0.1dB.

[0076] Figure 9 The S-parameter curves of a 2.4G antenna and a 5G antenna placed side-by-side with a 60mm (nearest relative edge) spacing are presented. The dashed line represents the S-parameter curve of a 2.4G antenna without the U-shaped slot 34 and a 5G antenna without the open stub 24 placed side-by-side with a 60mm spacing; the solid line represents the S-parameter curve of a 2.4G antenna with the U-shaped slot 34 and a 5G antenna with the open stub 24 placed side-by-side with a 60mm spacing. It can be seen that after suppressing the standing wave ratio (SWR) of the two antennas, the inter-frequency isolation in the 2.4G band is improved by a maximum of 8dB, and the inter-frequency isolation in the 5G band is improved by a maximum of 25dB, while the SWR of the antennas in their respective operating frequency bands remains essentially unchanged.

[0077] The antenna in this application embodiment has high inter-frequency isolation and at least the following advantages:

[0078] 1. Utilize open stubs to suppress VSWR of 5G antennas near the 2.4G frequency band, while having virtually no impact on VSWR of the 5G frequency band.

[0079] 2. By introducing a new resonance through slotting, the original current distribution pattern is changed, thereby suppressing the standing wave of the 2.4G antenna in the 5G band.

[0080] 3. By adding parasitic stubs to the pixelated area, the range of the same-direction current distribution is enhanced, thereby improving the antenna gain.

[0081] 4. Symmetrical open branches, parasitic branches, and slots ensure good omnidirectional radiation characteristics.

[0082] 5. By adjusting the size of the open stub, the low-frequency performance of the antenna can be controlled independently with almost no impact on the high-frequency performance, which is more conducive to optimization during the design phase.

[0083] 6. By adjusting the dimensions of the slot length and slot width, the high-frequency performance of the antenna can be adjusted independently with almost no impact on the low-frequency performance, which is more conducive to optimization during the design phase.

[0084] 7. The proposed heterodyne standing wave suppression technology is universal and applicable not only to the design of external rod antennas but also to the antenna design of other products.

[0085] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An antenna, characterized in that, Including antenna elements operating in the first frequency band; The antenna unit includes a plurality of radiators spaced apart along a first direction, a pixelated region located between two adjacent radiators, a feed point disposed on a first radiator, and a decoupling unit electrically coupled to the feed point. Wherein, the first radiator is any one of the plurality of radiators, the pixelated region is used to configure current paths between the connected radiators, and the decoupling unit is used to suppress the standing wave of the antenna unit in the second frequency band.

2. The antenna as described in claim 1, characterized in that, The pixelated region includes multiple grids arranged in an array for filling conductors, and a portion of the multiple grids are provided with conductors to form current guides, which are used to fold reverse current in the first direction.

3. The antenna as described in claim 1, characterized in that, The first radiator includes a first oscillator arm and a second oscillator arm arranged at intervals along the first direction. The feed point is located between the first oscillator arm and the second oscillator arm. The feed point includes a core wire pad and an outer conductor pad. The outer conductor pad is connected to the first oscillator arm and is used to establish an electrical connection with the outer conductor of the coaxial line. The core wire pad is disposed on the second oscillator arm and is used to establish an electrical connection with the core wire of the coaxial line.

4. The antenna as described in claim 1 or 3, characterized in that, The first radiator is the first radiator along the first direction.

5. The antenna as described in claim 1 or 3, characterized in that, The decoupling unit includes an open stub, which is electrically connected to the core wire pad of the feed point.

6. The antenna as described in claim 5, characterized in that, The open-circuit stub includes a first stub and a second stub, which are respectively connected to the core wire pad of the feed point and are located on opposite sides of the first radiator.

7. The antenna as claimed in claim 6, characterized in that, The electrical lengths of the first and second stubs in the second frequency band correspond to 1 / 4 wavelength.

8. The antenna as claimed in claim 6, characterized in that, The electrical lengths of the first stub and the second stub in the first frequency band correspond to half a wavelength.

9. The antenna as described in claim 3, characterized in that, The decoupling unit includes a slot formed on the first radiator, and the slot is electrically coupled to the feed point.

10. The antenna as claimed in claim 9, characterized in that, The slotting includes a first slot and a second slot. The first slot is formed on the first vibrator arm, and the second slot is formed on the second vibrator arm. The first slot and the second slot are respectively located near the feed point.

11. The antenna as claimed in claim 10, characterized in that, The first slot and the second slot are U-shaped slots, with the bottom of the first slot and the bottom of the second slot facing away from the power supply point, respectively.

12. The antenna as claimed in claim 10, characterized in that, The electrical lengths of the first slot and the second slot in the second frequency band correspond to half a wavelength.

13. The antenna as claimed in claim 9, characterized in that, The first oscillator arm is a U-shaped or H-shaped structure with its opening located in the first direction, and its length in the first direction corresponds to 1 / 4 wavelength of the first frequency band.

14. The antenna as claimed in claim 1, characterized in that, It also includes multiple pairs of parasitic branches, with each pair of parasitic branches located on opposite sides of a pixelated region, and the length of each parasitic branch in the first direction corresponding to half the wavelength of the first frequency band.

15. An antenna, characterized in that, It includes a first antenna unit operating in the first frequency band and a second antenna unit operating in the second frequency band; The first antenna element includes a plurality of first radiating portions arranged at intervals along a first direction, a first pixelated region located between two adjacent first radiating portions, a first feed point disposed on a first sub-radiating portion, and an open-circuit stub coupled to the first feed point; wherein, the first sub-radiating portion is any one of the plurality of first radiating portions, the first pixelated region is used to configure a current path between the connected first radiating portions, and the open-circuit stub is used to suppress the standing wave ratio of the first antenna element in a second frequency band. The second antenna element includes a plurality of second radiating portions arranged at intervals along a third direction, a second pixelated region located between two adjacent second radiating portions, a second feed point disposed on a second sub-radiating portion, and a slot formed in the second sub-radiating portion; wherein the second sub-radiating portion is any one of the plurality of second radiating portions, the second pixelated region is used to configure a current path between the connected second radiating portions, and the slot is used to suppress the standing wave of the second antenna element in a first frequency band.

16. An electronic device, characterized in that, Including the antenna as described in any one of claims 1 to 15.

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