Directional antenna and communication device

Abstract

The application provides a directional antenna and a communication device, the directional antenna comprising a dielectric substrate and a radiator, the radiator being arranged on the dielectric substrate, the radiator comprising a radiation part and a reflection part, the radiation part comprising a first dipole and a second dipole arranged at intervals along a first direction parallel to the surface of the dielectric substrate, the length of the first dipole in the first direction being the same as the length of the second dipole in the first direction; the reflection part extending along the first direction, and the reflection part and the radiation part being arranged at intervals along a second direction parallel to the surface of the dielectric substrate, the second direction being orthogonal to the first direction; wherein the reflection part comprises a plurality of reflection segments arranged along the first direction, the reflection segments comprising a first reflection segment, the length of the first reflection segment in the first direction being greater than the half wavelength corresponding to the center frequency of the electric signal in the radiation part, and the first dipole and the second dipole being located between the two ends of the first reflection segment in the first direction. The directional antenna provided by the application has the advantage of high gain.

Description

Technical Field

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

[0002] A directional antenna is an antenna device that can concentrate the radiation and reception of electromagnetic waves in a specific direction. It achieves directional control by focusing electromagnetic wave energy in a specific direction, resulting in higher signal strength and longer propagation distance in the target direction, while reducing interference in other directions. However, directional antennas in related technologies suffer from low gain. Utility Model Content

[0003] The purpose of this application is to provide a directional antenna to solve the technical problem of low gain in existing directional antennas.

[0004] In a first aspect, embodiments of this application provide a directional antenna.

[0005] The directional antenna provided in this application embodiment includes a dielectric substrate; a radiator disposed on the dielectric substrate, the radiator including: a radiating portion, the radiating portion including a first element and a second element arranged at intervals along a first direction, the first direction being parallel to the surface of the dielectric substrate, the length dimension of the first element in the first direction being the same as the length dimension of the second element in the first direction; a reflecting portion, the reflecting portion extending along the first direction, and the reflecting portion and the radiating portion arranged at intervals along a second direction, the second direction being parallel to the surface of the dielectric substrate, and the second direction being orthogonal to the first direction; wherein, the reflecting portion includes at least one reflecting segment, the reflecting segment including a first reflecting segment, the length dimension of the first reflecting segment in the first direction being greater than half a wavelength corresponding to the center frequency of the electrical signal in the radiating portion, and the first element and the second element being located between the two ends of the first reflecting segment in the first direction.

[0006] The beneficial effects of the directional antenna provided in this application embodiment are as follows: Compared with the prior art, the length of the reflector of the directional antenna provided in this application embodiment is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part. On the one hand, it can ensure that the reflected wave emitted by the reflector and the beam emitted by the radiating part away from the reflector are in phase and superimposed. On the other hand, when the length of the reflector is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part, the reflector can cover a wider frequency band range, ensuring that multiple wavelength components near the center frequency can be effectively reflected, thereby enhancing the signal strength of the directional beam of the directional antenna provided in this application embodiment.

[0007] In addition, the first and second radiating elements of the radiating section are positioned between the two ends of the first reflecting section in the first direction, which increases the coverage of the reflected beam of the reflecting section and further enhances the signal strength of the directional beam of the directional antenna provided in this application embodiment, so that the directional antenna provided in this application embodiment has the advantage of high gain.

[0008] Optionally, the radiating section further includes a first resonant section and a second resonant section, wherein the first resonant section extends along the first direction, and the end of the first oscillator opposite to the second oscillator is coupled to one end of the first resonant section; the second resonant section extends along the first direction, and the end of the second oscillator opposite to the first oscillator is coupled to one end of the second resonant section.

[0009] Optionally, the distance between the end of the first oscillator away from the second oscillator and the end of the second oscillator away from the first oscillator in the first direction is less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part.

[0010] The first resonant segment and the second resonant segment have the same length. The length of the first resonant segment in the first direction is greater than half the wavelength of the electrical signal in the radiating part and less than the wavelength corresponding to the center frequency of the electrical signal in the radiating part.

[0011] Optionally, there are multiple radiating portions, including a first portion and a second portion, wherein the first portion and the second portion are respectively located on both sides of the reflecting portion in the second direction.

[0012] Optionally, there are multiple reflective segments, and the multiple reflective segments further include a second reflective segment and a third reflective segment. The second reflective segment extends along the first direction, and one end of the second reflective segment is coupled to one end of the first reflective segment. The third reflective segment extends along the first direction, and one end of the third reflective segment is coupled to the other end of the first reflective segment.

[0013] Optionally, the radiator further includes a guide portion located on the side of the radiator facing away from the reflector in the second direction. The guide portion includes a plurality of guide segments arranged along the first direction, and adjacent guide segments are capacitively coupled together.

[0014] Wherein, the length of the guide segment in the first direction is greater than one-quarter of the wavelength corresponding to the center frequency of the electrical signal in the radiating part and less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part.

[0015] Optionally, the coupling distance between two adjacent guide segments is less than the coupling distance between two adjacent reflector segments.

[0016] Optionally, the plurality of guide segments include a first guide segment, wherein one end of the first guide segment in the first direction is positioned in the same direction as the end of the first oscillator opposite to the second oscillator in the first direction, and the other end of the first guide segment in the first direction is positioned in the same direction as the end of the second oscillator opposite to the first oscillator in the first direction.

[0017] Optionally, the first oscillator has a first power supply section at one end facing the second oscillator, and the second oscillator has a second power supply section at one end facing the first oscillator. The first power supply section and the second power supply section are used to connect to a port, and the electrical signal input to the first power supply section at the port is out of phase with the electrical signal input to the second power supply section at the port.

[0018] Wherein, the first power supply part is located on the side of the first oscillator facing the second oscillator away from the guide part in the second direction, and / or, the second power supply part is located on the side of the second oscillator facing the first oscillator away from the guide part in the second direction.

[0019] Secondly, embodiments of this application provide a communication device.

[0020] The communication device provided in this application includes the directional antenna described in any of the above embodiments.

[0021] 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

[0022] 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.

[0023] Figure 1 A schematic diagram of the structure of the directional antenna provided in Embodiment 1 of this application. Figure 1 ;

[0024] Figure 2 A schematic diagram of the structure of the directional antenna provided in Embodiment 1 of this application. Figure 2 ;

[0025] Figure 3 A beam diagram of a directional antenna provided for Embodiment 1 of this application;

[0026] Figure 4 A schematic diagram of the feed line of a directional antenna provided in Embodiment 1 of this application;

[0027] Figure 5 A schematic diagram of the structure of a directional antenna provided in Embodiment 2 of this application;

[0028] Figure 6 A beam diagram of a directional antenna provided for Embodiment 2 of this application;

[0029] Figure 7 A schematic diagram of the structure of the communication device provided in Embodiment 3 of this application;

[0030] Figure 8 A schematic diagram of the structure of the communication device provided in Embodiment 4 of this application;

[0031] Figure 9 A schematic diagram of the structure of the communication device provided in Embodiment 5 of this application;

[0032] Figure 10 A schematic diagram of the structure of the communication device provided in Embodiment Six of this application;

[0033] Figure 11 This is a schematic diagram of the communication device provided in Embodiment 7 of this application.

[0034] The following are the labeling elements in the figure:

[0035] 100. Directional antenna;

[0036] 10. Dielectric substrate;

[0037] 20. Radiator; 21. Radiating section; 21a. First section; 21b. Second section; 211. First oscillator; 212. Second oscillator; 213. First resonant section; 214. Second resonant section; 22. Reflecting section; 221. First reflecting section; 222. Second reflecting section; 223. Third reflecting section; 23. Guiding section; 231. First guiding section; 232. Second guiding section; 233. Third guiding section; 24. First feed section; 25. Second feed section; 26. Feeder wire;

[0038] 200. Omnidirectional antenna. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] A directional antenna is an antenna device that can concentrate the radiation and reception of electromagnetic waves in a specific direction. Directional antennas can focus electromagnetic wave energy in a specific direction to achieve directional control, making the signal stronger and longer in the target direction, while reducing interference in other directions.

[0044] However, directional antennas in related technologies suffer from low gain.

[0045] To address the aforementioned technical problems, embodiments of this application provide a directional antenna and a communication device using the directional antenna. The communication device provided in this application can be a wireless router, a power-saving wireless communication device, a portable communication device, etc.

[0046] The directional antenna provided in this application embodiment has a reflector on the side of the radiating part away from the radiation direction of the directional antenna. The reflector reflects the beam of the radiating part, so that the beam reflected by the reflector is superimposed in phase with the beam emitted by the side of the radiating part away from the reflector, thereby improving the beam gain of the directional antenna provided in this application embodiment in its radiation direction.

[0047] Please refer to the following as well. Figures 1 to 4 The directional antenna 100 provided in the embodiments of this application will now be described.

[0048] 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.

[0049] The directional antenna 100 provided in this application embodiment includes a dielectric substrate 10 and a radiator 20.

[0050] In some embodiments, the substrate material 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.

[0051] The radiator 20 is disposed on the dielectric substrate 10, and the radiator 20 includes a radiating part 21 and a reflecting part 22.

[0052] like Figures 1 to 4 As shown, the radiator 20 is a metal patch, which is disposed on the surface of the dielectric substrate 10. The radiating part 21 is used to connect to the port to transmit the electrical signal in the port to the radiating part 21. The electrical signal in the radiating part 21 generates a beam in the radiating part 21.

[0053] The radiating section 21 includes a first oscillator 211 and a second oscillator 212 arranged at intervals along a first direction x parallel to the surface of the dielectric substrate 10. The length dimension of the first oscillator 211 in the first direction x is the same as the length dimension of the second oscillator 212 in the first direction x.

[0054] like Figure 2 As shown, both the first oscillator 211 and the second oscillator 212 extend along the first direction x, and the first oscillator 211 and the second oscillator 212 are arranged along the first direction x. The end of the first oscillator 211 facing the second oscillator 212 is used to connect to the port, and the end of the second oscillator 212 facing the first oscillator 211 is used to connect to the port, thereby radiating the beam through the first oscillator 211 and the second oscillator 212.

[0055] In some embodiments, the length of the first oscillator 211 in the first direction x and the length of the second oscillator 212 in the first direction x are both one-quarter of the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21, so that the first oscillator 211 and the second oscillator 212 are combined to form a half-wave dipole antenna.

[0056] The reflective portion 22 extends along the first direction x, and the reflective portion 22 and the radiating portion 21 are arranged at intervals along the second direction y, which is parallel to the surface of the dielectric substrate 10, and the second direction y is orthogonal to the first direction x.

[0057] like Figure 1 , Figure 2 and Figure 3As shown, the reflector 22 is disposed on one side of the radiator 21 in the second direction y, and both the reflector 22 and the radiator 21 extend along the first direction x. The electromagnetic waves emitted by the radiator 21 toward the reflector 22 in the second direction y can be captured, absorbed and reflected by the reflector 22 to the side of the radiator 21 in the second direction y away from the reflector 22. The side of the radiator 21 in the second direction y away from the reflector 22 is the radiation direction of the directional antenna 100 provided in this embodiment.

[0058] The reflective part 22 includes multiple reflective segments arranged along the first direction x. Each reflective segment includes a first reflective segment 221. The length of the first reflective segment 221 in the first direction x is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21. The first oscillator 211 and the second oscillator 212 are both located between the two ends of the first reflective segment 221 in the first direction x.

[0059] like Figures 1 to 4 As shown, multiple reflection segments extend along the first direction x, and the first reflection segment 221 is located on one side of the first oscillator 211 and the second oscillator 212 in the second direction y, so as to capture the beam generated by the first oscillator 211 and the second oscillator 212 propagating along the second direction y through the first reflection segment 221.

[0060] The beneficial effects of the directional antenna 100 provided in this application embodiment are as follows: Compared with the prior art, the length of the first reflection segment 221 in the reflector 22 of the directional antenna 100 provided in this application embodiment is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21. On the one hand, it can ensure that the reflected wave emitted by the reflector 22 and the beam emitted by the radiating part 21 away from the reflector 22 are in phase and superimposed. On the other hand, when the length of the first reflection segment 221 is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21, the reflector 22 can cover a wider frequency band range, ensuring that multiple wavelength components near the center frequency can be effectively reflected, thereby enhancing the signal strength of the directional beam of the directional antenna 100 provided in this application embodiment.

[0061] In addition, the first element 211 and the second element 212 of the radiating section 21 are located between the two ends of the first reflecting section 221 in the first direction x, which increases the coverage of the reflected beam of the reflecting section 22 and further improves the signal strength of the directional beam of the directional antenna 100 provided in this application embodiment, so that the directional antenna 100 provided in this application embodiment has the advantage of high gain.

[0062] In some embodiments provided in this application, multiple reflective segments extend along a first direction x, and two adjacent reflective segments are coupled together.

[0063] In some of these embodiments, such as Figure 2As shown, the multiple reflection segments also include a second reflection segment 222 and a third reflection segment 223. The second reflection segment 222 extends along the first direction x, and one end of the second reflection segment 222 is coupled to one end of the first reflection segment 221. The third reflection segment 223 extends along the first direction x, and one end of the third reflection segment 223 is coupled to the other end of the first reflection segment 221.

[0064] Therefore, the second reflection segment 222 and the third reflection segment 223 can respectively absorb the beams radiated by the first reflection segment 221 in the first direction x, and convert part of the energy of the beam radiated by the first reflection segment 221 in the first direction x into a beam reflected along the second direction y, thereby improving the reflection efficiency of the reflector 22 and improving the gain of the directional antenna 100 provided in the embodiment of this application in the second direction y.

[0065] Unlike existing reflectors that use a single-unit structure, the directional antenna 100 provided in this application embodiment forms a reflector 22 by combining multiple reflector segments, making the reflector 22 more conducive to standing wave optimization and with stronger reflection performance, thereby improving antenna gain.

[0066] In some embodiments provided in this application, the radiating part 21 further includes a first resonant segment 213 and a second resonant segment 214. The first resonant segment 213 extends along a first direction x, and one end of the first resonant segment 213 is coupled to the end of the first oscillator 211 away from the second oscillator 212. The second resonant segment 214 extends along the first direction x, and one end of the second resonant segment 214 is coupled to the end of the second oscillator 212 away from the first oscillator 211.

[0067] like Figure 2 As shown, the first resonant segment 213 and the second resonant segment 214 both extend along the first direction x. The first resonant segment 213 is located on the side of the first oscillator 211 away from the second oscillator 212, and the second resonant segment 214 is located on the side of the second oscillator 212 away from the first oscillator 211. The first resonant segment 213 and the second resonant segment 214 respectively capture the beams emitted by the first oscillator 211 and the second oscillator 212 along the first direction x and radiate part of their energy along the second direction y, thereby reducing the beam intensity of the radiating part 21 in the second direction y and improving the beam directivity of the directional antenna 100 provided in this application embodiment.

[0068] In some embodiments provided in this application, the distance between the end of the first oscillator 211 away from the second oscillator 212 and the end of the second oscillator 212 away from the first oscillator 211 in the first direction x is less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21.

[0069] like Figure 2As shown, one end of the first resonant segment 213 is coupled to the end of the first oscillator 211 away from the port, so that the electrical signal in the first oscillator 211 can be conducted into the first resonant segment 213. The first resonant segment 213 increases the conduction path of the electrical signal in the radiation segment, so that the length of the first oscillator 211 in the first direction x is smaller than half the wavelength corresponding to the center frequency of the electrical signal in the radiation segment.

[0070] One end of the second resonant section 214 is coupled to the end of the second oscillator 212 away from the port, so that the electrical signal in the second oscillator 212 can be conducted into the second resonant section 214. The second resonant section 214 increases the conduction path of the electrical signal in the radiation section, so that the length of the second oscillator 212 in the first direction x is smaller than half the wavelength corresponding to the center frequency of the electrical signal in the radiation section.

[0071] In some embodiments provided in this application, the first resonant segment 213 and the second resonant segment 214 have the same length in the first direction x.

[0072] Therefore, the radiating part 21 is symmetrical in the first direction x, that is, the radiating part 21 has an axis of symmetry extending along the second direction y, so that the intensity of the beam generated by the directional antenna 100 provided in this application embodiment is distributed about the axis of symmetry of the radiating part 21.

[0073] In some embodiments provided in this application, the length of the first resonant segment 213 in the first direction x is greater than half the wavelength of the electrical signal in the radiating section 21 and less than the wavelength corresponding to the center frequency of the electrical signal in the radiating section 21. Therefore, by increasing the length of the first resonant segment 213, the ability of the first resonant segment 213 to capture the beam emitted by the first oscillator 211 along the first direction x is improved, further reducing the gain of the radiating segment in the first direction x and increasing the gain of the radiating segment in the second direction y.

[0074] In some embodiments provided in this application, the length of the second resonant segment 214 in the first direction x is greater than half the wavelength of the electrical signal in the radiating section 21 and less than the wavelength corresponding to the center frequency of the electrical signal in the radiating section 21. Therefore, by increasing the length of the second resonant segment 214, the ability of the second resonant segment 214 to capture the beam emitted by the second oscillator 212 along the first direction x is improved, further reducing the gain of the radiating segment in the first direction x and increasing the gain of the radiating segment in the second direction y.

[0075] In some embodiments provided in this application, the distance between the reflector 22 and the radiator 21 in the second direction y is (4n+1) / 4 times the wavelength corresponding to the center frequency of the electrical signal in the radiator 21, where n is a natural number.

[0076] In some of these embodiments, the distance between the reflector 22 and the radiator 21 in the second direction y is one-quarter of the wavelength corresponding to the center frequency of the electrical signal inside the radiator 21.

[0077] Therefore, the beam reflected by the reflector 22 to the radiator 21 on the side away from the reflector 22 is superimposed in phase with the beam emitted by the radiator 21 along the side away from the reflector 22, thereby improving the gain of the directional antenna 100 provided in this embodiment.

[0078] In some embodiments provided in this application, there are multiple radiating portions 21, including a first portion 21a and a second portion 21b, which are respectively located on both sides of the reflecting portion 22 in the second direction y.

[0079] In some embodiments, such as Figure 5 and Figure 6 As shown, there is one first part 21a and one second part 21b. The first part 21a and the second part 21b are connected to the first port and the second port respectively, so as to realize dual-port communication through the first part 21a and the second part 21b.

[0080] The first part 21a and the second part 21b are located on opposite sides of the reflector 22 in the second direction y. The reflector 22 absorbs and captures the beam emitted by the first part 21a toward the second part 21b and the beam emitted by the second part 21b toward the first part 21a, respectively. The beam emitted by the first part 21a toward the second part 21b is reflected to the side of the first part 21a away from the second part 21b, and the beam emitted by the second part 21b toward the first part 21a is reflected to the side of the second part 21b away from the first part 21a.

[0081] Therefore, on the one hand, such as Figure 6 As shown, beams are emitted to both sides of the second direction by the first part 21a and the second part 21b respectively. On the other hand, the first part 21a and the second part 21b are located on both sides of the reflector 22 in the second direction y. The reflector 22 realizes decoupling between the first part 21a and the second part 21b, and improves the isolation between the first port and the second port.

[0082] In some embodiments provided in this application, the first part 21a and the second part 21b are arranged symmetrically about the axis of the reflective part 22 in the first direction x.

[0083] In some embodiments provided in this application, the radiator 20 further includes a guide portion 23, which is located on the side of the radiator 21 away from the reflector 22. The guide portion 23 includes a plurality of guide segments arranged along a first direction x, and adjacent guide segments are capacitively coupled together.

[0084] like Figure 1 , Figure 2 and Figure 5 As shown, the guide section 23 is located on the side of the radiating section 21 away from the reflecting section 22, that is, in the direction in which the radiating section 21 emits the directional beam. The guide section extends along the first direction x, and multiple guide sections are arranged along the first direction x. Adjacent guide sections are capacitively coupled together. The guide section can be equivalent to an inductor, and the gap between the guide sections can be equivalent to a capacitor.

[0085] Therefore, the guiding section 23 generates an induced current through near-field coupling with the radiating section. When the radiating section emits electromagnetic waves, the induced current on the guiding section will form a secondary radiation field, which is superimposed on the radiation field of the guiding section. It can be understood that the guiding section guides the beam generated by the radiating section to the second direction y, thereby enhancing the gain of the directional antenna 100 provided in this application in the second direction y.

[0086] In some embodiments, the length of the guide segment in the first direction x is greater than one-quarter of the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21 and less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part 21.

[0087] The guiding segment obtains energy from the radiating section 21 through electromagnetic coupling. Its length needs to meet specific phase conditions to achieve directional enhancement. When the length of the guiding segment in the first direction x is slightly less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating section 21, its induced current phase lags behind the first oscillator 211 and the second oscillator 212. After superimposing with the radiation field formed by the first oscillator 211 and the second oscillator 212, in-phase enhancement is formed on the side of the guiding segment away from the first oscillator 211 and the second oscillator 212 in the second direction y. In other directions, the phase difference causes cancellation, thereby concentrating energy to radiate towards the side of the guiding segment away from the first oscillator 211 and the second oscillator 212 in the second direction y.

[0088] In some embodiments, the length of the guide segment in the first direction x is 0.38 to 0.44 times the wavelength corresponding to the center frequency of the electrical signal within the radiating section 21.

[0089] In some embodiments provided in this application, such as Figure 2 As shown, the multiple guide segments include a first guide segment 231. One end of the first guide segment 231 is positioned in the first direction x at the same position as the end of the first oscillator 211 that is away from the second oscillator 212 in the first direction x. The other end of the first guide segment 231 is positioned in the first direction x at the same position as the end of the second oscillator 212 that is away from the first oscillator 211 in the first direction x.

[0090] In some embodiments provided in this application, such as Figure 2As shown, the multiple guiding segments include a second guiding segment 232 and a third guiding segment 233. The second guiding segment 232 is located on one side of the first guiding segment 231 in the first direction x, and the second guiding segment 232 is arranged correspondingly to the first resonant segment 213 in the second direction y. The third guiding segment 233 is located on the other side of the first guiding segment 231 in the first direction x, and the third guiding segment 233 is arranged correspondingly to the second resonant segment 214 in the second direction y.

[0091] Thus, the beam generated by the first oscillator 211 and the second oscillator 212 is guided in the second direction y by the first guiding segment 231, the beam generated by the first resonant segment 213 is guided in the second direction y by the second guiding segment 232, and the beam generated by the second resonant segment 214 is guided in the second direction y by the third guiding segment 233, so as to improve the gain of the directional antenna 100 provided in the embodiments of this application through multiple guiding segments.

[0092] In some embodiments provided in this application, the length of the first guide segment 231, the length of the second guide segment 232, and the length of the third guide segment 233 in the first direction x are the same.

[0093] In other embodiments provided in this application, the length of the first guide segment 231 in the first direction x is greater than the length of the second guide segment 232 in the first direction x and the length of the third guide segment 233 in the first direction x.

[0094] In some embodiments provided in this application, the coupling distance between two adjacent guide segments is less than the coupling distance between two adjacent reflective segments.

[0095] like Figure 1 , Figure 2 and Figure 5 As shown, two adjacent reflective segments are arranged at a distance in the first direction x, and there is a first gap between the two adjacent reflective segments. Two adjacent guide segments are arranged at a distance in the first direction x, and there is a second gap between the two adjacent guide segments. The size of the first gap in the first direction x is larger than the size of the second gap in the first direction x.

[0096] Capacitive coupling is formed between two adjacent guiding sections. The coupling effect between two adjacent guiding sections is greater than that between two adjacent reflecting sections. On the one hand, the input impedance of the guiding section 23 is reduced to decrease the reflection loss, so that the guiding section 23 can absorb the beam and emit it along the second direction y. On the other hand, the input impedance of the reflecting section 22 is increased to increase the reflection loss, so that the reflecting section 22 can reflect the beam it absorbs along the second direction y.

[0097] Thus, through the combined action of the reflector 22 and the guide 23, the gain of the directional antenna 100 provided in the present application embodiment in the second direction y is improved.

[0098] In some embodiments provided in this application, a plurality of reflective portions 22 are symmetrical about the second direction y, a first oscillator 211 and a second oscillator 212 are symmetrical about the second direction y, and the end of the first oscillator 211 away from the second oscillator 212 and the end of the second oscillator 212 away from the first oscillator 211 are arranged symmetrically about the second direction y.

[0099] Therefore, the beam generated by the directional antenna 100 provided in this application embodiment is also symmetrically distributed about the first axis of symmetry, avoiding excessively strong or weak local signals due to excessive directivity.

[0100] In some embodiments provided in this application, the first oscillator 211 is provided with a first feed section 24 at one end facing the second oscillator 212, and the second oscillator 212 is provided with a second feed section 25 at one end facing the first oscillator 211. The first feed section 24 and the second feed section 25 are used to connect to a port, and the electrical signal input to the first feed section 24 at the port is out of phase with the electrical signal input to the second feed section 25 at the port.

[0101] The first power supply unit 24 is located on the side of the first oscillator 211 facing the second oscillator 212 away from the guide unit 23 in the second direction y, and / or the second power supply unit 25 is located on the side of the second oscillator 212 facing the first oscillator 211 away from the guide unit 23 in the second direction y.

[0102] like Figure 4 As shown, the arrangement direction of the first feed section 24 and the second feed section 25 has an angle with the first direction x, so as to reduce the influence on the beam generated by the radiating section 21 when the port inputs electrical signals to the first oscillator 211 and the second oscillator 212 through the first feed section 24 and the second feed section 25.

[0103] In some embodiments (not shown in the figures), the first power supply section 24 and the second power supply section 25 are both located on the side of the first oscillator 211 away from the guide section 23.

[0104] In some other embodiments (not shown in the figures), the first power supply 24 is located on one side of the first oscillator 211 in the first direction x, and the second power supply 25 is located on the side of the second oscillator 212 opposite to the guide 23 in the second direction y.

[0105] In other embodiments, such as Figure 4 As shown, the first power supply unit 24 is located on the side of the first oscillator 211 away from the guide unit 23 in the second direction y, and the second power supply unit 25 is located on the side of the second oscillator 212 in the first direction x.

[0106] Therefore, the first power supply section 24 or the second power supply section 25 is located on the side of the radiation section away from the guide section 23 in the second direction y, which can reduce the beam effect on the radiation section 21 when an electrical signal is input from the port to the radiation section 21.

[0107] In some embodiments provided in this application, the radiating part 21 is connected to the port via a feed line 26. One end of the feed line 26 is electrically connected to the first feed line 24 and the second feed line 25, and the other end of the feed line 26 is electrically connected to the port. The feed line is located on the side of the radiating part 21 away from the guide part 23 in the second direction y, so as to reduce the beam effect on the radiating part 21 when the electrical signal is transmitted in the feed line 26.

[0108] In some embodiments provided in this application, such as Figures 1 to 6 As shown, the width dimensions of the first oscillator 211, the second oscillator 212, the first resonant segment 213, and the second resonant segment 214 in the second direction y are all the same. This is to improve the half-power beamwidth of the directional antenna 100 provided in the embodiments of this application.

[0109] In other embodiments (not shown in the figures), the width of the first element 211 in the second direction y is the same as the width of the second element 212 in the second direction y, the width of the first resonant segment 213 in the second direction y is the same as the width of the second resonant segment 214 in the second direction y, and the width of the first element 211 in the second direction y is greater than the width of the first resonant segment 213 in the second direction y. This is to reduce the sidelobe intensity of the directional antenna 100 provided in the embodiments of this application and optimize the directivity of the main board.

[0110] In some embodiments provided in this application, such as Figures 1 to 6 As shown, the widths of the first reflection segment 221, the second reflection segment 222, and the third reflection segment 223 in the second direction y are the same. This is to improve the half-power beamwidth of the directional antenna 100 provided in this embodiment of the application.

[0111] In other embodiments (not shown in the figures), the width of the second reflector 222 in the second direction y is the same as the width of the third reflector 223 in the second direction y, and the width of the second reflector 222 in the second direction y is smaller than the width of the first reflector 221 in the second direction y. This is to reduce the sidelobe intensity of the directional antenna 100 provided in this application embodiment and optimize the directivity of the motherboard.

[0112] In some embodiments provided in this application, such as Figures 1 to 6As shown, the widths of the first guide segment 231, the second guide segment 232, and the third guide segment 233 in the second direction y are the same. This is to improve the half-power beamwidth of the directional antenna 100 provided in this embodiment.

[0113] In other embodiments (not shown in the figures), the width of the second guide segment 232 in the second direction y is the same as the width of the third guide segment 233 in the second direction y, and the width of the second guide segment 232 in the second direction y is smaller than the width of the first guide segment 231 in the second direction y. This is to reduce the sidelobe intensity of the directional antenna 100 provided in this application embodiment and optimize the directivity of the motherboard.

[0114] The communication device provided in the embodiments of this application is described below.

[0115] The communication device provided in this application includes the directional antenna 100 in any of the above embodiments.

[0116] The directional antenna 100 provided in this application embodiment has the advantage of high gain, thereby giving the communication device provided in this application embodiment the advantage of high gain.

[0117] In some embodiments provided in the application, the communication device includes an omnidirectional antenna 200 and a directional antenna 100 provided in the embodiments of this application.

[0118] In some of these embodiments, such as Figure 7 As shown, the directional antenna 100 includes a reflector 22 and multiple radiating parts 21. The multiple radiating parts 21 include a first part 21a and a second part 21b. The first part 21a and the second part 21b are located on both sides of the reflector 22, respectively. The omnidirectional antenna 200, the first part 21a and the second part 21b can be powered independently to switch the radiation direction of the communication device.

[0119] When the omnidirectional antenna 200 is powered on, and the first part 21a and the second part 21b are powered on or off simultaneously, the communication device operates in omnidirectional mode. When the omnidirectional antenna 200 is powered off, and the first part 21a and the second part 21b are powered on simultaneously, the communication device transmits a beam along the arrangement direction of the first part 21a and the second part 21b. When the omnidirectional antenna 200 and the first part 21a are powered off, and the second part 21b is powered on, the communication device transmits a beam along the side of the second part 21b away from the reflector 22. When the omnidirectional antenna 200 and the second part 21b are powered off, and the first part 21a is powered on, the communication device transmits a beam along the side of the first part 21a away from the reflector 22.

[0120] In some other embodiments, such as Figure 8 and Figure 9As shown, the directional antenna 100 includes a reflector 22 and a radiating part 21 disposed on one side of the reflector 22. The directional antenna 100 and the omnidirectional antenna 200 can be powered independently to switch the radiation direction of the communication device.

[0121] When both the omnidirectional antenna 200 and the directional antenna 100 are powered, the communication equipment increases the gain of the directional antenna 100 in the radiation direction while radiating in all directions; when the omnidirectional antenna 200 is powered off and the directional antenna 100 is powered on, the communication equipment operates in directional mode and transmits beams in the radiation direction of the directional antenna 100; when the omnidirectional antenna 200 is powered on and the directional antenna 100 is powered off, the communication equipment operates in omnidirectional mode.

[0122] In some of the embodiments described above, such as Figure 8 As shown, the radiation direction of the directional antenna 100 is opposite to that of the omnidirectional antenna 200 in order to reduce beam coupling interference between the directional antenna 100 and the omnidirectional antenna 200.

[0123] In some other embodiments described above, such as Figure 9 As shown, the radiation direction of the directional antenna 100 is toward the omnidirectional antenna 200.

[0124] In some embodiments provided in the application, the communication device includes a plurality of directional antennas 100 provided in the embodiments of this application.

[0125] In some of these embodiments, such as Figure 10 As shown, the communication device includes two directional antennas 100. Each directional antenna 100 includes a reflector 22 and multiple radiating parts 21. The two radiating parts 21 include a first part 21a and a second part 21b. The first part 21a and the second part 21b are located on both sides of the reflector 22, respectively. The first part 21a and the second part 21b of the two directional antennas 100 can be powered independently to switch the radiation direction of the communication device.

[0126] In some other embodiments, such as Figure 11 As shown, the communication device includes two directional antennas 100. Each directional antenna 100 includes a reflector 22 and a radiating part 21 disposed on one side of the reflector 22. The radiation directions of the two directional antennas 100 are opposite to reduce crosstalk between the two directional antennas 100.

[0127] The above are merely preferred embodiments of this application and are 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 directional antenna, characterized in that, include: Dielectric substrate; A radiator is disposed on the dielectric substrate, the radiator comprising: The radiating section includes a first oscillator and a second oscillator arranged at intervals along a first direction, the first direction being parallel to the surface of the dielectric substrate, and the length dimension of the first oscillator in the first direction being the same as the length dimension of the second oscillator in the first direction. A reflective portion extends along a first direction, and the reflective portion and the radiating portion are spaced apart along a second direction, the second direction being parallel to the surface of the dielectric substrate and orthogonal to the first direction; The reflective portion includes at least one reflective segment, the reflective segment includes a first reflective segment, the length of the first reflective segment in the first direction is greater than half the wavelength corresponding to the center frequency of the electrical signal in the radiating portion, and the first oscillator and the second oscillator are both located between the two ends of the first reflective segment in the first direction.

2. The directional antenna as described in claim 1, characterized in that: The radiating section further includes a first resonant section and a second resonant section. The first resonant section extends along the first direction, and the end of the first oscillator away from the second oscillator is coupled to one end of the first resonant section. The second resonant section extends along the first direction, and the end of the second oscillator away from the first oscillator is coupled to one end of the second resonant section.

3. The directional antenna as described in claim 2, characterized in that: The distance between the end of the first oscillator away from the second oscillator and the end of the second oscillator away from the first oscillator in the first direction is less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part. The first resonant segment and the second resonant segment have the same length. The length of the first resonant segment in the first direction is greater than half the wavelength of the electrical signal in the radiating part and less than the wavelength corresponding to the center frequency of the electrical signal in the radiating part.

4. The directional antenna as described in claim 1, characterized in that: The radiating part is a plurality of such parts, including a first part and a second part, wherein the first part and the second part are respectively located on both sides of the reflecting part in the second direction.

5. The directional antenna as described in claim 1, characterized in that: The reflective segments are multiple, including a second reflective segment and a third reflective segment. The second reflective segment extends along the first direction, and one end of the second reflective segment is coupled to one end of the first reflective segment. The third reflective segment extends along the first direction, and one end of the third reflective segment is coupled to the other end of the first reflective segment.

6. The directional antenna as described in claim 5, characterized in that: The radiator further includes a guide portion located on the side of the radiator facing away from the reflector in the second direction. The guide portion includes a plurality of guide segments arranged along the first direction, and adjacent guide segments are capacitively coupled together. Wherein, the length of the guide segment in the first direction is greater than one-quarter of the wavelength corresponding to the center frequency of the electrical signal in the radiating part and less than half the wavelength corresponding to the center frequency of the electrical signal in the radiating part.

7. The directional antenna as described in claim 6, characterized in that: The coupling distance between two adjacent guide segments is less than the coupling distance between two adjacent reflector segments.

8. The directional antenna as described in claim 6, characterized in that: The plurality of guide segments include a first guide segment, wherein one end of the first guide segment in the first direction is positioned in the same direction as the end of the first oscillator opposite to the second oscillator in the first direction, and the other end of the first guide segment in the first direction is positioned in the same direction as the end of the second oscillator opposite to the first oscillator in the first direction.

9. The directional antenna as described in claim 6, characterized in that: The first oscillator has a first power supply section at the end facing the second oscillator, and the second oscillator has a second power supply section at the end facing the first oscillator. The first power supply section and the second power supply section are used to connect to a port, and the electrical signal input to the port from the first power supply section is out of phase with the electrical signal input to the port from the second power supply section. Wherein, the first power supply part is located on the side of the first oscillator facing the second oscillator away from the guide part in the second direction, and / or, the second power supply part is located on the side of the second oscillator facing the first oscillator away from the guide part in the second direction.

10. A communication device, characterized in that, The directional antenna includes any one of claims 1-9.

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