Dual frequency antenna and communication device

Abstract

The application provides a dual-frequency antenna and a communication device. The dual-frequency antenna comprises a dielectric substrate and a radiator. A signal source inputs a first signal and a second signal to the radiator along a first direction, the first direction is parallel to a surface of the dielectric substrate, the working frequency band of the first signal is different from the working frequency band of the second signal, and the size of the radiator in the first direction is a positive integer multiple of the corresponding half wavelength at any frequency in the working frequency band of the second signal. The radiator comprises a plurality of narrow radiation units and a plurality of wide radiation units which are alternately connected in the first direction. The length of the narrow radiation unit and the wide radiation unit in the first direction is the same, and the length of the narrow radiation unit in the first direction is the corresponding half wavelength at any frequency in the working frequency band of the first signal. The width of the narrow radiation unit in the second direction is smaller than the width of the wide radiation unit in the second direction. The dual-frequency antenna provided by the application has the advantage of high gain in dual-frequency communication.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and more specifically, relates to a dual-band antenna and communication device. Background Technology

[0002] A dual-band antenna is an antenna capable of operating simultaneously on two different frequency bands. It is widely used in mobile communications, satellite communications, and wireless local area networks. One type of dual-band antenna generates different resonant modes under excitation at different operating frequency bands to achieve common-aperture dual-band communication. However, dual-band antennas in related technologies suffer from low gain. Utility Model Content

[0003] The purpose of this application is to provide a dual-band antenna and communication device to solve the technical problem of low gain in the prior art.

[0004] In one aspect, embodiments of this application provide a dual-band antenna.

[0005] The dual-band antenna provided in this application includes a dielectric substrate; a radiator disposed on the dielectric substrate, the radiator being connected to a signal source, the signal source inputting a first signal and a second signal to the radiator along a first direction, the first direction being parallel to the surface of the dielectric substrate, the operating frequency band of the first signal being different from the operating frequency band of the second signal, and the dimension of the radiator in the first direction being a positive integer multiple of half the wavelength corresponding to any frequency within the operating frequency band of the second signal; the radiator includes a plurality of narrow radiating elements and a plurality of wide radiating elements alternately connected in the first direction, the length dimension of the narrow radiating element in the first direction being the same as the length dimension of the wide radiating element in the first direction, and the length dimension of the narrow radiating element in the first direction being half the wavelength corresponding to any frequency within the operating frequency band of the first signal; wherein, the width dimension of the narrow radiating element in the second direction is smaller than the width dimension of the wide radiating element in the second direction, the second direction being parallel to the surface of the dielectric substrate, and the second direction being orthogonal to the first direction.

[0006] The beneficial effects of the dual-frequency antenna provided in this application embodiment are as follows: the radiator of the dual-frequency antenna provided in this application embodiment can generate different resonant modes under the excitation of the first signal and the second signal, so that the radiator can achieve dual-frequency radiation. Compared with the prior art, the radiator of the dual-frequency antenna provided in this application embodiment includes a narrow radiation element and a wide radiation element. Under the excitation of the first signal, the current direction in the narrow radiation element and the wide radiation element is opposite. By reducing the width dimension of the narrow radiation element in the second direction, the intensity of the beam generated by the current in the narrow radiation element can be reduced, thereby reducing the influence of the reverse current on the beam generated by the wide radiation element, improving the beam gain of the first signal, and giving the dual-frequency antenna provided in this application embodiment the advantage of high gain.

[0007] Optionally, there are three narrow radiation units, which include a first narrow radiation unit, a second narrow radiation unit, and a third narrow radiation unit; and there are four wide radiation units, which include a first wide radiation unit, a second wide radiation unit, a third wide radiation unit, and a fourth wide radiation unit.

[0008] The first narrow radiation unit is connected between the first wide radiation unit and the second wide radiation unit, the second narrow radiation unit is connected between the second wide radiation unit and the third wide radiation unit, and the third narrow radiation unit is connected between the third wide radiation unit and the fourth wide radiation unit.

[0009] Optionally, the distance between the two ends of the radiator in the first direction is three times the half wavelength corresponding to any frequency within the operating frequency band of the second signal.

[0010] Optionally, the radiator further includes a power supply section, one end of which is electrically connected to the signal source, and the other end of which is connected to the second narrow radiating element. The power supply section inputs electrical signals with opposite phases to the two ends of the second narrow radiating element in the first direction.

[0011] Optionally, the first narrow radiation unit is coupled between the first wide radiation unit and the second wide radiation unit, the third narrow radiation unit is coupled between the third wide radiation unit and the fourth wide radiation unit, and the second narrow radiation unit is directly connected between the second wide radiation unit and the third wide radiation unit.

[0012] Optionally, the second narrow radiating element includes a first segment extending along a first direction and a second segment extending along a first direction. One end of the first segment in the first direction is connected to the second wide radiating element, and one end of the second segment in the first direction is connected to the third wide radiating element. The feeding part includes a first feed wire and a second feed wire. One end of the first feed wire is electrically connected to a signal source, and the other end of the first feed wire is connected to the end of the first segment away from the second wide radiating element. One end of the second feed wire is electrically connected to a signal source, and the other end of the second feed wire is connected to the end of the second segment away from the third wide radiating element.

[0013] Wherein, the length of the first segment in the first direction is the same as the length of the second segment in the first direction, and the first feeder wire and the second feeder wire are arranged parallel to each other and spaced apart along the first direction to form a parallel double-line structure.

[0014] Optionally, the first feed line and the second feed line are arranged symmetrically about the second direction, the plurality of wide radiation segments are arranged symmetrically about the axis of symmetry of the first feed line and the second feed line, and the plurality of narrow radiation segments are arranged symmetrically about the axis of symmetry of the first feed line and the second feed line.

[0015] Optionally, the narrow radiation unit includes a first coupling segment, a connecting segment, and a second coupling segment connected sequentially along the first direction. The first coupling segment and the second coupling segment both extend along the second direction. The connecting segment extends along the first direction. The side of the first coupling segment opposite to the connecting segment is coupled to one end of the wide radiation unit in the first direction. The side of the second coupling segment opposite to the connecting segment is coupled to one end of another wide radiation unit in the first direction.

[0016] Optionally, the radiator covers the surface of the dielectric substrate, and the radiator is provided with a plurality of through slots extending through the radiator along the thickness direction of the dielectric substrate.

[0017] In this configuration, a portion of the through slots forms the wide radiation unit, and the other portion of the through slots forms the narrow radiation unit.

[0018] Secondly, embodiments of this application provide a communication device.

[0019] The communication device provided in this application includes the dual-band antenna described in any of the above embodiments.

[0020] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the dual-band antenna provided in Embodiment 1 of this application;

[0023] Figure 2 Schematic diagram of the exploded structure of the dual-band antenna provided in Embodiment 1 of this application Figure 2 ;

[0024] Figure 3 A schematic diagram of standing waves for the dual-band antenna provided in Embodiment 1 of this application when the wide-radiating element and the narrow-radiating element are directly connected and when the wide-radiating element and the narrow-radiating element are coupled together.

[0025] Figure 4 The diagram shows the standing waves of the dual-band antenna provided in Embodiment 1 of this application when the first feed line and the second feed line form a parallel double line and when the first feed line and the second feed line do not form a parallel double line.

[0026] Figure 5 The radiation pattern of the dual-band antenna provided in Embodiment 1 of this application;

[0027] Figure 6 This is a schematic diagram of the gain of the dual-band antenna provided in Embodiment 1 of this application;

[0028] Figure 7 This is a schematic diagram of the structure of the dual-band antenna provided in Embodiment 2 of this application;

[0029] Figure 8 This is a schematic diagram of the standing wave of the dual-band antenna provided in Embodiment 2 of this application;

[0030] Figure 9 The radiation pattern of the dual-band antenna provided in Embodiment 2 of this application;

[0031] Figure 10 This is a schematic diagram of the gain of the dual-band antenna provided in Embodiment 2 of this application.

[0032] The following are the labeling elements in the figure:

[0033] 100. Dual-band antenna;

[0034] 10. Dielectric substrate;

[0035] 20. Radiator; 21. Wide radiating element; 211. First wide radiating element; 212. Second wide radiating element; 213. Third wide radiating element; 214. Fourth wide radiating element; 22. Narrow radiating element; 221. First narrow radiating element; 222. Second narrow radiating element; 2221. First segment; 2222. Second segment; 223. Third narrow radiating element; 23. Feeding section; 231. First feeder line; 232. Second feeder line. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] A dual-band antenna is an antenna that can operate simultaneously in two different frequency bands. It is widely used in mobile communications, satellite communications, wireless local area networks and other fields. One type of dual-band antenna generates different resonant modes under the excitation of different operating frequency bands to achieve common-aperture dual-band communication.

[0041] However, dual-band antennas in related technologies suffer from low gain.

[0042] To address the aforementioned problems, embodiments of this application provide a dual-band antenna and a communication device that uses the dual-band antenna.

[0043] The dual-band antenna provided in this application reduces the beam strength generated by the reverse current by decreasing the width of the radiator at the location of the reverse current, thereby reducing the impact of the reverse current on the antenna gain in the higher-order resonance mode, improving the gain of the dual-band antenna provided in this application, and improving the communication efficiency of the communication device provided in this application.

[0044] Please refer to the following: Figure 1 and Figure 2 The dual-band antenna 100 provided in the embodiments of this application will now be described.

[0045] It should be noted that the first direction in the following text refers to the x-direction shown in the figure, and the second direction in the following text refers to the y-direction shown in the figure.

[0046] The dual-band antenna 100 provided in this application embodiment includes a dielectric substrate 10 and a radiator 20.

[0047] In some embodiments, the material of the dielectric substrate 10 may include one or more materials with low dielectric constants, such as FR4 (epoxy resin-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic-filled hydrocarbon material), etc.

[0048] The radiator 20 is disposed on the dielectric substrate 10. The radiator 20 is used to connect to a signal source. The signal source inputs a first signal and a second signal to the radiator 20 along a first direction x. The first direction x is parallel to the surface of the dielectric substrate 10. The operating frequency band of the first signal is different from that of the second signal. The dimension of the radiator 20 in the first direction x is a positive integer multiple of half the wavelength corresponding to any frequency in the operating frequency band of the second signal.

[0049] In some embodiments, the size of the radiator 20 in the first direction x is a positive integer multiple of half the wavelength corresponding to the center frequency of the second signal operating frequency band.

[0050] like Figure 1 As shown, the radiator 20 is a metal patch, which is disposed on the surface of the dielectric substrate 10. The radiating unit is connected to the signal source. The electrical signal in the signal source can be transmitted to the radiating unit. The electrical signal in the radiating unit causes electromagnetic oscillation in the radiating unit so that the radiator 20 generates a beam.

[0051] The radiator 20 extends along the first direction x, and the first signal and the second signal are conducted in the radiator 20 along the first direction x. The second signal induces a multi-order resonant mode in the radiator 20, thereby converting the second signal into a beam through the radiator 20.

[0052] The radiator 20 includes a plurality of narrow radiating elements 22 and a plurality of wide radiating elements 21 that are alternately connected in the first direction x. The length of the narrow radiating element 22 in the first direction x is the same as that of the wide radiating element 21 in the first direction x, and the length of the narrow radiating element 22 in the first direction x is half the wavelength corresponding to any frequency in the first signal operating frequency band.

[0053] In some embodiments, the length of the narrow radiating element 22 in the first direction x is a positive integer multiple of half the wavelength corresponding to the center frequency of the first signal operating frequency band.

[0054] The width dimension of the narrow radiating unit 22 in the second direction y is smaller than the width dimension of the wide radiating unit 21 in the second direction y. The second direction y is parallel to the surface of the dielectric substrate 10 and is orthogonal to the first direction x.

[0055] like Figure 1 As shown, the length of the wide radiating element 21 in the first direction x and the length of the narrow radiating element 22 in the first direction x are within the wavelength range corresponding to the operating frequency band of the first signal. There are an integer number of wide radiating elements 21 and narrow radiating elements 22, so that the length of the radiator 20 in the first direction x is an integer multiple of half the wavelength corresponding to any frequency in the operating frequency band of the first signal. This allows the first signal to form a multi-order resonant mode in the multiple narrow radiating elements 22 and the multiple wide radiating elements 21, thereby converting the first signal into a beam through the radiator 20.

[0056] In some embodiments, the length of the radiator 20 in the first direction x is an integer multiple of half the wavelength corresponding to the center frequency of the first signal.

[0057] The first signal propagates along the first direction x within the radiator 20, and the direction of the current formed by the first signal within the radiator 20 is as follows: Figure 2 As shown in Figure a, the direction of the current generated by the first signal in the wide radiation unit 21 is opposite to the direction of the current generated by the first signal in the narrow radiation unit 22. Since the width of the narrow radiation unit 22 in the second direction y is smaller than that of the wide radiation unit 21 in the second direction y, the beam intensity excited by the current in the narrow radiation unit 22 is lower than that excited by the current in the wide radiation unit 21. This reduces the influence of the reverse beam generated by the narrow radiation unit 22 on the beam generated by the wide radiation unit 21, thereby increasing the gain of the beam generated by the first signal.

[0058] The beneficial effects of the dual-frequency antenna 100 provided in this application embodiment are as follows: the radiator 20 of the dual-frequency antenna 100 provided in this application embodiment can generate different resonant modes under the excitation of the first signal and the second signal, so that the radiator 20 can achieve dual-frequency radiation. Compared with the prior art, the radiator 20 of the dual-frequency antenna 100 provided in this application embodiment includes a narrow radiation element 22 and a wide radiation element 21. Under the excitation of the first signal, the current direction in the narrow radiation element 22 is opposite to that in the wide radiation element 21. By reducing the width dimension of the narrow radiation element 22 in the second direction y, the intensity of the beam generated by the current in the narrow radiation element 22 can be reduced, thereby reducing the influence of the reverse current on the beam generated by the wide radiation element, improving the beam gain of the first signal, and giving the dual-frequency antenna 100 provided in this application embodiment the advantage of high gain.

[0059] In addition, both the first and second signals generate beams through the radiator 20 to achieve dual-frequency common-aperture radiation, giving the dual-frequency antenna 100 provided in this application embodiment the advantage of small size.

[0060] In some embodiments provided in this application, there are three narrow radiation units 22, including a first narrow radiation unit 221, a second narrow radiation unit 222 and a third narrow radiation unit 223; and there are four wide radiation units 21, including a first wide radiation unit 21121, a second wide radiation unit 212, a third wide radiation unit 213 and a fourth wide radiation unit 214.

[0061] The first narrow radiating element 221 is connected between the first wide radiating element 21121 and the second wide radiating element 212, the second narrow radiating element 222 is connected between the second wide radiating element 212 and the third wide radiating element 213, and the third narrow radiating element 223 is connected between the third wide radiating element 213 and the fourth wide radiating element 214.

[0062] like Figure 1 and Figure 2 As shown, there are a total of seven narrow radiating elements 22 and wide radiating elements 21, so that the first signal causes the seventh-order mode resonance in the radiator 20, the beam is radiated through four wide radiating elements 21, and the influence of the three narrow radiating elements 22 on the beam generated by the wide radiating elements 21 is reduced, thereby reducing the distortion of the radiation pattern of the dual-frequency antenna 100 provided in this embodiment of the application.

[0063] Thus, the first signal induces resonance of the seventh-order mode in the radiator 20. The electric / magnetic field distribution of the odd-order resonance mode has central symmetry, and the energy is more concentrated in the main radiation direction, further enhancing the gain of the beam generated by the first signal.

[0064] In some embodiments provided in this application, the distance between the two ends of the radiator 20 in the first direction x is three times the half wavelength corresponding to any frequency in the operating frequency band of the second signal.

[0065] In some embodiments, the distance between the two ends of the radiator 20 in the first direction x is three times the half wavelength corresponding to the center frequency of the second signal.

[0066] Therefore, the second signal induces third-order mode resonance in the radiator 20, and the direction of the current formed by the second signal within the radiator 20 is as follows: Figure 2 As shown in b, the ratio between the center frequency of the second signal and the center frequency of the first signal is close to 7:3, so that the dual-band antenna 100 provided in this application embodiment can operate simultaneously in the Wi-Fi 2G band (2.4GHz-2.5GHz) and the Wi-Fi 5G band (5GHz-6GHz).

[0067] The average gain of the dual-band antenna 100 provided in this embodiment of the application within the Wi-Fi 2G band (2.4GHz-2.5GHz) is as follows: Figure 6 As shown in (a) in the figure, Figure 6 As shown in (a) of the present application, the dual-band antenna 100 provided in this embodiment has an average gain greater than 3.5 dB in the Wi-Fi 2G band (2.4 GHz - 2.5 GHz), and the average gain of the dual-band antenna 100 provided in this embodiment in the Wi-Fi 5G band (5 GHz - 6 GHz) is as follows. Figure 6 As shown in (b) in the figure, Figure 6 As shown in (b) of this application embodiment, the dual-band antenna 100 has an average gain of greater than 5.8dB in the Wi-Fi 5G band (5GHz-6GHz).

[0068] In some embodiments provided in this application, the radiator 20 further includes a power supply section 23, one end of which is electrically connected to a signal source, and the other end of which is connected to a second narrow radiation unit 222. The power supply section 23 inputs electrical signals with opposite phases to the two ends of the second narrow radiation unit 222 in the first direction x.

[0069] like Figure 1 and Figure 2 As shown, the power supply unit 23 is connected to the second narrow radiation unit 222 to input the first signal and the second signal to the multiple wide radiation units 21 and the multiple narrow radiation units 22 through the power supply unit 23. The second narrow radiation unit 222 is located in the middle section of the radiator 20 in the first direction x.

[0070] Therefore, by feeding an electrical signal to the middle section of the radiator 20 in the first direction x through the feed section 23, on the one hand, feeding from the middle section of the radiator 20 can reduce return loss, and on the other hand, feeding from the middle section of the radiator 20 makes the current magnitude in the radiator 20 symmetrically distributed along the first direction x, and further makes the electric field / magnetic field distribution symmetrically distributed about the axis of symmetry of the radiator 20 extending along the second direction y, so that the energy of the beam generated by the radiator 20 is more concentrated, and the gain of the dual-band antenna 100 provided in the embodiments of this application is further improved.

[0071] In some embodiments provided in this application, the first narrow radiating element 221 is coupled between the first wide radiating element 21121 and the second wide radiating element 212, and the third narrow radiating element 223 is coupled between the third wide radiating element 213 and the fourth wide radiating element 214.

[0072] like Figure 1 and Figure 2 As shown, the first narrow radiating element 221 is coupled to its two adjacent wide radiating elements 21, and the second narrow radiating element 222 is coupled to its two adjacent wide radiating elements 21.

[0073] When the first narrow radiating element 221 and the second narrow radiating element 222 are respectively coupled to the two adjacent wide radiating elements 21, the standing wave diagram of the dual-band antenna 100 provided in this application embodiment is shown in the figure. Figure 3 As shown in Figure a, when the first narrow radiating element 221 and the second narrow radiating element 222 are directly connected to the two adjacent wide radiating elements 21, the standing wave diagram of the dual-band antenna 100 provided in this application embodiment is as follows. Figure 3 As shown in b, the standing wave of the dual-band antenna 100 provided in this embodiment under the first signal excitation is as follows: Figure 3 1 in and Figure 3 As shown in two places in the figure, the standing wave of the dual-band antenna 100 provided in this application embodiment under the second signal excitation is as follows: Figure 3 As shown in the three places in the text.

[0074] Therefore, see Figure 3 It can be seen that by coupling the first narrow radiating element 221 and the second narrow radiating element 222 to the two adjacent wide radiating elements 21 respectively, the resonant frequency ratio of the first signal and the second signal of the dual-band antenna 100 provided in this application embodiment can be optimized, so that the dual-band antenna 100 provided in this application embodiment can resonate in the Wi-Fi 2G band (2.4GHz-2.5GHz) and the Wi-Fi 5G band (5GHz-6GHz) respectively.

[0075] In some embodiments provided in this application, the second narrow radiating element 222 is directly connected between the second wide radiating element 212 and the third wide radiating element 213.

[0076] This reduces the signal loss during transmission from the second narrow radiating element 222 to the second wide radiating element 212 and the third wide radiating element 213, thereby further improving the gain of the dual-band antenna 100 provided in this embodiment.

[0077] In some embodiments provided in this application, the narrow radiation unit 22 includes a first coupling segment, a connecting segment and a second coupling segment connected sequentially along a first direction x. The first coupling segment and the second coupling segment both extend along a second direction y. The connecting segment extends along the first direction x. The side of the first coupling segment away from the connecting segment is coupled to one end of the wide radiation unit 21 in the first direction x. The side of the second coupling segment away from the connecting segment is coupled to one end of another wide radiation unit 21 in the first direction x.

[0078] like Figure 1 and Figure 2 As shown, the first coupling segment and the second coupling segment extend along the first direction x, increasing the length of the coupling gap between the narrow radiating unit 22 and the wide radiating unit 21, changing the equivalent capacitance and inductance of the gap, thereby adjusting the input impedance to make it closer to the characteristic impedance of the feeder, and reducing the reflection loss between the wide radiating unit 21 and the narrow radiating unit 22.

[0079] The connecting segment extends along the first direction x to reduce the width of the connecting segment in the second direction y, thereby reducing the radiation intensity of the beam generated by the first signal within the connecting segment and reducing the influence of the narrow radiation element 22 on the beam generated by the wide radiation element 21, thus reducing the distortion of the radiation pattern of the dual-frequency antenna 100 provided in this application embodiment.

[0080] In some embodiments provided in this application, the second narrow radiating unit 222 includes a first segment 2221 and a second segment 2222 extending along a first direction x. One end of the first segment 2221 in the first direction x is connected to the second wide radiating unit 212, and one end of the second segment 2222 in the first direction x is connected to the third wide radiating unit 213. The power supply section 23 includes a first power supply line 231 and a second power supply line 232. One end of the first power supply line 231 is electrically connected to the signal source, and the other end of the first power supply line 231 is connected to the other end of the first segment 2221. One end of the second power supply line 232 is electrically connected to the signal source, and the other end of the second power supply line 232 is connected to the other end of the second segment 2222.

[0081] The first segment 2221 has the same length in the first direction x as the second segment 2222 in the first direction x. The first feeder wire 231 and the second feeder wire 232 are arranged in parallel intervals along the first direction x to form a parallel double-line structure.

[0082] The parallel double-line structure formed by the first feed line 231 and the second feed line 232 can further optimize the standing wave performance of the dual-frequency antenna 100 provided in this application embodiment for the first and second signals. When the first feed line 231 and the second feed line 232 do not form a parallel double-line structure, the standing wave curve of the dual-frequency antenna 100 provided in this application embodiment is as follows: Figure 4 As shown in Figure a, when the first feed line 231 and the second feed line 232 form a parallel double-line structure, the standing wave curve of the dual-band antenna 100 provided in this embodiment is as follows: Figure 4 As shown in b in the figure.

[0083] Therefore, from Figure 4 It can be seen that the parallel double-line structure formed by the first feed line 231 and the second feed line 232 enables the dual-band antenna 100 provided in this application embodiment to resonate in the Wi-Fi 2G band (2.4GHz-2.5GHz) and the Wi-Fi 5G band (5GHz-6GHz), respectively.

[0084] In some embodiments provided in this application, the first feed line 231 and the second feed line 232 are arranged symmetrically about the second direction y, a plurality of wide radiation segments are arranged symmetrically about the axis of symmetry of the first feed line 231 and the second feed line 232, and a plurality of narrow radiation segments are arranged symmetrically about the axis of symmetry of the first feed line 231 and the second feed line 232.

[0085] Therefore, the radiator 20 is symmetrical about the second direction y, that is, the radiator 20 has a symmetry axis extending along the second direction y, so that the electric field / magnetic field distribution generated by the radiator 20 has central symmetry, and the energy is more concentrated in the main radiation direction, further improving the gain of the dual-band antenna 100 provided in the embodiments of this application.

[0086] In some embodiments, the width of the coupling gap between the first wide radiating unit 21121 and the first narrow radiating unit 221 in the first direction x is the same as the width of the coupling gap between the second wide radiating unit 212 and the first narrow radiating unit 221 in the first direction x.

[0087] In other embodiments, the width of the coupling gap between the first wide radiating element 21121 and the first narrow radiating element 221 in the first direction x is different from the width of the coupling gap between the second wide radiating element 212 and the first narrow radiating element 221 in the first direction x.

[0088] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the combination of multiple wide radiating elements 21 and multiple narrow radiating elements 22 is symmetrical about the first direction x, that is, the wide radiating elements 21 and the narrow radiating elements 22 have the same axis of symmetry extending along the first direction x.

[0089] Therefore, the current is symmetrically and uniformly distributed in the second direction y, enabling the dual-band antenna 100 provided in this embodiment to achieve omnidirectional radiation in multiple directions orthogonal to the first direction x. The radiation pattern of the dual-band antenna 100 provided in this embodiment in the Wi-Fi 2G band (2.4GHz-2.5GHz) is shown below. Figure 5 As shown in (a) of this application, the radiation pattern of the dual-band antenna 100 in the Wi-Fi 5G band (5GHz-6GHz) is as follows. Figure 5 As shown in (b) of the diagram.

[0090] In the first embodiment provided in this application, the wide radiation unit 21 is a rectangular patch, the narrow radiation unit 22 is an "I"-shaped patch, and the first feed line 231 and the second feed line 232 are microstrip lines extending along the second direction y.

[0091] In the second embodiment provided in this application, as Figure 7 As shown, the radiator 20 covers the surface of the dielectric substrate 10, and the radiator 20 has a plurality of through slots that penetrate the radiator 20 along the thickness direction of the dielectric substrate 10.

[0092] Among them, such as Figure 7 As shown, a portion of the through slots forms a wide radiating unit 21, and another portion of the through slots forms a narrow radiating unit 22. The first feed line 231 and the second feed line 232 are through slots extending along the second direction y.

[0093] like Figure 7 As shown, the wide radiation element 21, the narrow radiation element 22 and the feed section 23 are through slots that penetrate the radiator 20 along the thickness direction of the radiator 20. The current in the radiator 20 is concentrated at the edge of the through slot, so that the dual-frequency antenna 100 in the above embodiment 2 has the same radiation effect as the dual-frequency antenna 100 in the above embodiment 1.

[0094] Among them, such as Figure 8 As shown, the dual-band antenna 100 in Embodiment 2 of this application resonates in the Wi-Fi 2G band (2.4GHz-2.5GHz) and the Wi-Fi 5G band (5GHz-6GHz), respectively.

[0095] like Figure 9 (a) and Figure 9 As shown in (b) of this application, the dual-band antenna 100 in Embodiment 2 achieves omnidirectional radiation in the Wi-Fi 2G band (2.4GHz-2.5GHz) and the Wi-Fi 5G band (5GHz-6GHz).

[0096] like Figure 10As shown in (a), the dual-band antenna 100 provided in Embodiment 2 of this application has an average gain greater than 3.7dB in the Wi-Fi 2G band (2.4GHz-2.5GHz), and the dual-band antenna 100 II provided in this embodiment of the application has an average gain in the Wi-Fi 5G band (5GHz-6GHz) as shown in (a). Figure 10 As shown in (b) in the figure, Figure 10 As shown in (b) of this application embodiment, the dual-band antenna 100 has an average gain of greater than 6dB in the Wi-Fi 5G band (5GHz-6GHz).

[0097] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dual-band antenna, characterized in that, include: Dielectric substrate; A radiator is disposed on the dielectric substrate. The radiator is used to connect to a signal source. The signal source inputs a first signal and a second signal to the radiator along a first direction. The first direction is parallel to the surface of the dielectric substrate. The operating frequency band of the first signal is different from that of the second signal. The dimension of the radiator in the first direction is a positive integer multiple of half the wavelength corresponding to any frequency in the operating frequency band of the second signal. The radiator includes a plurality of narrow radiating units and a plurality of wide radiating units alternately connected in the first direction. The length of the narrow radiating unit in the first direction is the same as that of the wide radiating unit in the first direction, and the length of the narrow radiating unit in the first direction is half the wavelength corresponding to any frequency within the first signal operating frequency band. Wherein, the width dimension of the narrow radiating unit in the second direction is smaller than the width dimension of the wide radiating unit in the second direction, the second direction is parallel to the surface of the dielectric substrate, and the second direction is orthogonal to the first direction.

2. The dual-band antenna as described in claim 1, characterized in that: There are three narrow radiation units, which include a first narrow radiation unit, a second narrow radiation unit, and a third narrow radiation unit. There are four wide radiation units, which include a first wide radiation unit, a second wide radiation unit, a third wide radiation unit, and a fourth wide radiation unit. The first narrow radiation unit is connected between the first wide radiation unit and the second wide radiation unit, the second narrow radiation unit is connected between the second wide radiation unit and the third wide radiation unit, and the third narrow radiation unit is connected between the third wide radiation unit and the fourth wide radiation unit.

3. The dual-band antenna as described in claim 2, characterized in that: The distance between the two ends of the radiator in the first direction is three times the half wavelength corresponding to any frequency within the operating frequency band of the second signal.

4. The dual-frequency antenna as described in claim 2, characterized in that: The radiator further includes a power supply unit, one end of which is electrically connected to the signal source, and the other end of which is connected to the second narrow radiating unit. The power supply unit inputs electrical signals with opposite phases to the two ends of the second narrow radiating unit in the first direction.

5. The dual-band antenna as described in claim 4, characterized in that: The first narrow radiating element is coupled between the first wide radiating element and the second wide radiating element, the third narrow radiating element is coupled between the third wide radiating element and the fourth wide radiating element, and the second narrow radiating element is directly connected between the second wide radiating element and the third wide radiating element.

6. The dual-band antenna as described in claim 5, characterized in that: The second narrow radiating element includes a first segment extending along a first direction and a second segment extending along the first direction. One end of the first segment in the first direction is connected to the second wide radiating element, and one end of the second segment in the first direction is connected to the third wide radiating element. The feeding part includes a first feed wire and a second feed wire. One end of the first feed wire is electrically connected to a signal source, and the other end of the first feed wire is connected to the end of the first segment away from the second wide radiating element. One end of the second feed wire is electrically connected to a signal source, and the other end of the second feed wire is connected to the end of the second segment away from the third wide radiating element. Wherein, the length of the first segment in the first direction is the same as the length of the second segment in the first direction, and the first feeder wire and the second feeder wire are arranged parallel to each other and spaced apart along the first direction to form a parallel double-line structure.

7. The dual-band antenna as described in claim 6, characterized in that: The first feed line and the second feed line are arranged symmetrically about the second direction, the plurality of wide radiation elements are arranged symmetrically about the axis of symmetry of the first feed line and the second feed line, and the plurality of narrow radiation elements are arranged symmetrically about the axis of symmetry of the first feed line and the second feed line.

8. The dual-band antenna as described in claim 1, characterized in that: The narrow radiation unit includes a first coupling segment, a connecting segment, and a second coupling segment connected sequentially along the first direction. Both the first coupling segment and the second coupling segment extend along the second direction. The connecting segment extends along the first direction. The side of the first coupling segment opposite to the connecting segment is coupled to one end of the wide radiation unit in the first direction. The side of the second coupling segment opposite to the connecting segment is coupled to one end of another wide radiation unit in the first direction.

9. The dual-band antenna as described in any one of claims 1-8, characterized in that: The radiator covers the surface of the dielectric substrate, and the radiator is provided with a plurality of through slots that penetrate the radiator along the thickness direction of the dielectric substrate. In this configuration, a portion of the through slots forms the wide radiation unit, and the other portion of the through slots forms the narrow radiation unit.

10. A communication device, characterized in that, Includes a dual-band antenna as described in any one of claims 1-9.

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