Dual frequency directional antenna and communication device
By designing a cross-directional midsegment and feed network in a directional antenna, high-isolation dual-port dual-frequency communication is achieved, solving the problem that dual-frequency communication cannot be achieved in existing technologies and improving the isolation and radiation directionality of communication equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TP-LINK
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-14
AI Technical Summary
Existing directional antennas cannot achieve high isolation in dual-band communication.
By designing a mid-section and a feeding network with intersecting directions, feeding in the first and second directions respectively, TM01 and TM03 resonant modes are generated, achieving polarization isolation and improving port isolation.
It achieves high-isolation dual-port dual-frequency communication, improving the space utilization and radiation directionality of communication equipment.
Smart Images
Figure CN224502342U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of communication technology, and more specifically, relates to a dual-band directional antenna and communication device. Background Technology
[0002] A directional antenna is an antenna that concentrates electromagnetic wave energy in the direction of its main lobe for transmission or reception. Directional antennas exhibit significant directionality in space; that is, the intensity of the radiated or received signal is greatest in the direction of its main lobe, and decreases rapidly in other directions. This characteristic makes directional antennas highly advantageous in scenarios requiring long-distance communication, reduced interference, or increased signal gain. However, directional antennas in related technologies suffer from the inability to achieve high-isolation dual-port dual-frequency communication. Utility Model Content
[0003] The purpose of this application is to provide a dual-frequency directional antenna and a communication device to solve the technical problem that existing directional antennas cannot achieve dual-frequency communication.
[0004] In one aspect, embodiments of this application provide a dual-frequency directional antenna.
[0005] The dual-band directional antenna provided in this application includes a radiator comprising multiple mid-sections and multiple end sections. Each mid-section includes a first mid-section and a second mid-section. The first mid-section extends along a first direction and is coupled between two end sections spaced apart along the first direction. The second mid-section extends along a second direction and is coupled between two end sections spaced apart along a second direction. The first direction intersects the second direction. A feeding network includes a first feeding section and a second feeding section. The first feeding section is used to connect between a first port and the first mid-section, and the second feeding section is used to connect between a second port and the second mid-section.
[0006] The beneficial effects of the dual-frequency directional antenna provided in this application embodiment are as follows: Compared with the prior art, the dual-frequency directional antenna provided in this application embodiment feeds the first middle section and its two ends in the first direction through the first feeding part, and feeds the second middle section and its two ends in the second direction through the second feeding part.
[0007] The first middle section and its two ends in the first direction can generate TM01 resonant mode and TM03 resonant mode respectively under the electrical signal input from the first power supply to the first middle section, so as to realize dual-frequency communication polarized along the first direction. The second middle section and its two ends in the second direction can generate TM01 resonant mode and TM03 resonant mode respectively under the electrical signal input from the second power supply to the second middle section, so as to realize dual-frequency communication polarized along the second direction.
[0008] Therefore, by improving the isolation between the first port and the second port through polarization isolation, the dual-band directional antenna provided in this application embodiment has the advantage of being able to achieve dual-port dual-band communication with high isolation.
[0009] Optionally, the middle section includes a settling groove recessed on one side of the middle section orthogonal to its extension direction.
[0010] Optionally, there are at least two settling tanks, and the settling tanks are arranged opposite each other in pairs along a direction orthogonal to the extension direction of the middle section.
[0011] Optionally, there are multiple settling tanks, which are arranged at intervals along the extension direction of the middle section.
[0012] Optionally, the first power supply unit is used to input two electrical signals with the same transmission direction to both sides of the first middle section facing the first direction, and the second power supply unit is used to input two electrical signals with the same transmission direction to both sides of the second middle section facing the second direction.
[0013] Optionally, the middle section includes a through groove that extends through the middle section along its thickness direction. The through groove includes a first section and a second section. The first section extends along the extension direction of the middle section, and the extension direction of the second section intersects with the extension direction of the middle section. One end of the second section is connected to the first section, and the other end of the second section is connected to the outer contour of the middle section.
[0014] The power supply network is connected to the inner walls of both sides of the second segment in the extension direction of the middle segment.
[0015] Optionally, the first power supply section includes a first wire and a second wire, the first wire and the second wire are parallel to each other, the first wire is connected to the side wall of the second segment of the first middle section facing the first direction, and the first wire is connected to the first port, the second wire is connected to the side wall of the second segment of the first middle section facing the other direction, and the second wire is connected to the first port.
[0016] The second power supply section includes a third wire and a fourth wire, which are parallel to each other. The third wire is connected to the side wall of the second segment of the second middle section facing the second direction and is also connected to the second port. The fourth wire is connected to the side wall of the second segment of the second middle section facing the other direction and is also connected to the second port.
[0017] Optionally, the dual-band directional antenna further includes a substrate, the substrate including a first surface and a second surface arranged parallel to each other and spaced apart, the radiator being disposed on the first surface, the first feed part being disposed on the first surface, the second feed part being disposed on the second surface, and the second feed part being connected to the radiator through a metallized via.
[0018] Optionally, the first direction is orthogonal to the second direction.
[0019] Secondly, embodiments of this application also provide a communication device.
[0020] The communication device provided in this application includes the dual-frequency 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 This is a schematic diagram of the structure of a dual-frequency directional antenna provided in an embodiment of this application;
[0024] Figure 2 A schematic diagram of the first surface of a dual-band directional antenna provided in an embodiment of this application;
[0025] Figure 3 A schematic diagram of the second surface of a dual-band directional antenna provided in an embodiment of this application;
[0026] Figure 4 A schematic diagram of the middle section of a dual-band directional antenna provided in an embodiment of this application;
[0027] Figure 5 A schematic diagram of the internal current of the "end-middle-end" structure of the dual-band directional antenna provided in the embodiments of this application;
[0028] Figure 6 The radiation pattern of the dual-frequency directional antenna provided in the embodiments of this application;
[0029] Figure 7 A schematic diagram of the standing wave ratio of a dual-frequency directional antenna provided in an embodiment of this application;
[0030] Figure 8This is a schematic diagram of the radiation parameters of a dual-frequency directional antenna provided in an embodiment of this application.
[0031] The following are the labeling elements in the figure:
[0032] 100. Dual-band directional antenna;
[0033] 10. Radiator; 11. Middle section; 11a. First middle section; 11b. Second middle section; 111. Settling tank; 111a. First settling tank; 111b. Second settling tank; 112. Through channel; 1121. First section; 1122. Second section; 12. End point;
[0034] 20. Power supply network; 21. First power supply section; 211. First conductor; 212. Second conductor; 22. Second power supply section; 221. Third conductor; 222. Fourth conductor;
[0035] 30. Substrate; 31. First surface; 32. Second surface;
[0036] 40. Reflector. Detailed Implementation
[0037] 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.
[0038] 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.
[0039] 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.
[0040] 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.
[0041] This application provides a dual-band directional antenna and a communication device.
[0042] The communication equipment provided in this application can be a wireless router, a wireless access point (AP), a mobile phone, or other devices capable of wireless communication.
[0043] Please refer to the following: Figure 1 and Figure 2 The dual-frequency directional antenna 100 provided in the embodiments of this application will now be described.
[0044] It should be noted that the first direction in the following text is... Figure 1 The x-direction shown below, the second direction in the following text is Figure 1 The y-direction shown is the thickness direction of the radiator 10. Figure 1 The z-direction is shown in the figure.
[0045] The dual-band directional antenna 100 provided in this application embodiment includes a radiator 10 and a feed network 20.
[0046] In some embodiments, the radiator 10 can be a patch or a vibrator, and the power supply network 20 is used to conduct electrical signals from the signal source to the radiator 10, thereby exciting electromagnetic oscillations to be generated in the radiator 10 to transmit beams and realize wireless communication.
[0047] The radiator 10 includes at least two middle sections 11 and a plurality of end sections 12. The middle sections 11 include a first middle section 11a and a second middle section 11b. The first middle section 11a extends along a first direction x and is coupled between two end sections 12 spaced apart along the first direction x. The second middle section 11b extends along a second direction y and is coupled between two end sections 12 spaced apart along the second direction y. The first direction x and the second direction y intersect.
[0048] In some embodiments, such as Figure 1 and Figure 2 As shown, the radiator 10 is a patch, and the radiator 10 includes at least two middle sections 11 and at least three ends 12. Each middle section 11 has two ends 12 coupled to its two ends respectively. The first middle section 11a extends along the first direction x, and the two ends of the first middle section 11a in the first direction x are coupled to its two ends respectively. The second middle section 11b extends along the second direction y, and the two ends of the second middle section 11b in the second direction y are coupled to its two ends respectively.
[0049] In some embodiments, the first middle segment 11a and the second middle segment 11b have the same shape. In other embodiments, the first middle segment 11a and the second middle segment 11b have different shapes.
[0050] The first direction x intersects with the second direction y, thereby causing the extension direction of the structure "end 12 - first middle section 11a - end 12" in the radiator 10 to intersect with the extension direction of the structure "end 12 - second middle section 11b - end 12" in the radiator 10. This results in the beam polarization direction in the structure "end 12 - first middle section 11a - end 12" in the radiator 10 intersecting with the beam polarization direction in the structure "end 12 - second middle section 11b - end 12" in the radiator 10. By polarization isolation, the isolation between the beams in the structure "end 12 - first middle section 11a - end 12" and the beams in the structure "end 12 - second middle section 11b - end 12" in the radiator 10 is improved.
[0051] The power supply network 20 includes a first power supply section 21 and a second power supply section 22. The first power supply section 21 is used to connect between the first port and the first middle section 11a, and the second power supply section 22 is used to connect between the second port and the second middle section 11b.
[0052] The dual-band directional antenna 100 provided in this embodiment has a first port (not shown in the figure) and a second port (not shown in the figure), and the first port and the second port are respectively connected to different signal sources, such as... Figure 1 and Figure 2 As shown, the electrical signal in the first port is transmitted to the "end 12-first middle section 11a-end 12" structure in the radiator 10 through the first power supply unit 21, and the electrical signal in the second port is transmitted to the "end 12-second middle section 11b-end 12" structure in the radiator 10 through the second power supply unit 22, thereby realizing dual-port communication.
[0053] The beneficial effects of the dual-frequency directional antenna 100 provided in this application embodiment are as follows: Compared with the prior art, the dual-frequency directional antenna 100 provided in this application embodiment feeds the first middle section 11a and its two ends 12 in the first direction x through the first feed section 21, and feeds the second middle section 11b and its two ends 12 in the second direction y through the second feed section 22.
[0054] Specifically, the first middle section 11a and its two ends 12 in the first direction x can generate TM01 resonant mode and TM03 resonant mode respectively under the electrical signal input from the first power supply 21 to the first middle section 11a, so as to realize dual-frequency communication polarized along the first direction x. The second middle section 11b and its two ends 12 in the second direction y can generate TM01 resonant mode and TM03 resonant mode respectively under the electrical signal input from the second power supply 22 to the second middle section 11b, so as to realize dual-frequency communication polarized along the second direction y.
[0055] Therefore, by improving the isolation between the first port and the second port through polarization isolation, the dual-band directional antenna 100 provided in this application embodiment has the advantage of being able to achieve dual-port dual-band communication with high isolation.
[0056] In some embodiments provided in this application, the path length of the electrical signal in the "end 12-middle section 11-end 12" structure of the radiator 10 is half the wavelength corresponding to the center frequency of the operating frequency band of the radiator 10 in the TM01 resonant mode, and the path length of the electrical signal in the end 12 and the path length of the electrical signal in the middle section 11 are both half the wavelength corresponding to the center frequency of the operating frequency band of the radiator 10 in the TM03 resonant mode.
[0057] Therefore, the equivalent current direction of the radiator 10 in the TM01 resonant mode is as follows: Figure 5 As shown in Figure a, the equivalent current direction of radiator 10 in TM03 resonant mode is as follows: Figure 5 As shown in b in the figure.
[0058] In some embodiments, the radiator 10 operates in the 2.4GHz-2.5GHz frequency band in the TM01 resonant mode and in the 5.15GHz-5.85GHz frequency band in the TM03 resonant mode.
[0059] In some embodiments provided in this application, the first direction x is orthogonal to the second direction y. This further improves the isolation between the beam generated by "end 12 - first middle section 11a - end 12" in the radiator 10 and the beam generated by "end 12 - second middle section 11b - end 12" in the radiator 10, thereby improving the isolation between the first port and the second port.
[0060] The isolation of the dual-band directional antenna 100 provided in this embodiment is as follows: Figure 8 As shown, Figure 8 In this context, S1,1 represents the echo from the first port. Figure 8 S2,2 in the equation represents the echo from the second port. Figure 8 In this context, S2,1 represents the isolation between the first port and the second port, such as... Figure 8 As shown, the isolation between the first port and the second port can be greater than 80dB.
[0061] In some embodiments provided in this application, such as Figure 1 and Figure 2As shown, there are four ends 12, which are arranged at equal intervals along the circumferential direction so that the four ends 12 are arranged in pairs along the first direction x and the second direction y respectively. That is, two ends 12 of the four ends 12 are arranged along the first direction x in a one-to-one correspondence with the other two ends 12, and two ends 12 of the four ends 12 are arranged along the second direction y in a one-to-one correspondence with the other two ends 12, forming a four-element array structure.
[0062] like Figure 1 and Figure 2 As shown, there are two first middle sections 11a, each connected between two end sections 12 arranged along the first direction x, and the two middle sections 11 are arranged at intervals along the second direction y. There are two second middle sections 11b, each connected between two end sections 12 arranged along the second direction y, and the two middle sections 11 are arranged at intervals along the first direction x.
[0063] Therefore, the first middle segment 11a and the second middle segment 11b are arranged alternately in a circular pattern along the circumferential arrangement direction of the four ends 12, so that adjacent first middle segments 11a and second middle segments 11b are coupled to the same end 12, thereby enabling the first port and the second port to achieve common aperture radiation, improving the space utilization of the dual-frequency directional antenna 100 provided in this application embodiment, and facilitating the miniaturization of the antenna.
[0064] The structure of the first middle segment 11a and the second middle segment 11b is described below. It should be noted that the middle segment 11 mentioned below may include at least one of the first middle segment 11a and the second middle segment 11b.
[0065] In some embodiments (not shown in the figure), the middle section 11 in the following text is the first middle section 11a, and the structure of the second middle section 11b is different from that of the first middle section 11a.
[0066] In some other embodiments (not shown in the figures), the middle segment 11 referred to below is the second middle segment 11b, and the structure of the first middle segment 11a is different from that of the second middle segment 11b.
[0067] In other embodiments, such as Figure 1 and Figure 2 As shown below, the middle section 11 refers to the first middle section 11a and the second middle section 11b in the radiator 10. The first middle section 11a and the second middle section 11b have the same shape.
[0068] Therefore, the structure of "end 12-first middle section 11a-end 12" in radiator 10 has the same shape as the structure of "end 12-second middle section 11b-end 12" in radiator 10, so that the beam generated by the first port excited radiator 10 has the same radiation pattern as the beam generated by the second port excited radiator 10.
[0069] In some embodiments provided in this application, the middle section 11 includes a sink 111, which is recessed on one side of the middle section 11 orthogonal to its extension direction.
[0070] It should be noted that for the first middle segment 11a, the extension direction of the first middle segment 11a is the first direction x, and for the second middle segment 11b, the extension direction of the first middle segment 11b is the second direction y.
[0071] like Figure 4 As shown, the middle section 11 has its extension direction. The electrical signal is conducted in the middle section 11 along the extension direction of the middle section 11. The extension direction of the sink 111 is orthogonal to the extension direction of the body of the middle section 11. Therefore, when the electrical signal is conducted along the edge of the middle section 11, it needs to bypass the sink 111. The opening of the sink 111 is located on the side wall of the middle section 11 in a direction orthogonal to its extension direction. The bottom of the sink 111 extends towards the inside of the middle section 11.
[0072] Therefore, by setting the sink 111, on the one hand, the transmission path length of the electrical signal in the middle section 11 is increased, causing the resonant point of the middle section 11 to shift to a lower frequency; on the other hand, such as... Figure 4 As shown, by setting the sink 111, the current conducted along the extension direction of the middle section 11 can be bent, reducing the radiation intensity generated at the middle section 11 by the structure of the end 12-middle section 11-end 12 of the radiator 10. In the TM03 resonant mode, the influence of the middle section 11 on the radiation pattern of the end 12 at both ends can be reduced, thereby improving the radiation directivity of the dual-frequency directional antenna 100 provided in this application embodiment in the TM03 resonant mode.
[0073] like Figure 6 As shown, Figure 6 In the figure, 'a' represents the radiation pattern of the dual-frequency directional antenna 100 in the TM01 resonant mode in the yOz plane when the middle section is equipped with a sinkhole 111. Figure 6 In the figure, b represents the radiation pattern of the dual-frequency directional antenna 100 provided in this embodiment of the application in the TM03 resonant mode, when the middle section 11 is provided with a sinkhole 111, in the yOz plane shown in the figure. Figure 6 In the figure, c represents the radiation pattern of the dual-frequency directional antenna 100 in the TM01 resonant mode in the xOz plane when the middle section 11 is provided with a sinkhole 111. Figure 6 In the figure, d represents the radiation pattern of the dual-frequency directional antenna 100 in the TM03 resonant mode in the xOz plane when the middle section 11 is provided with a sinkhole 111.
[0074] from Figure 6As can be seen from the diagram, by setting the sink 111, the sidelobe intensity of the dual-frequency directional antenna 100 provided in this application embodiment can be reduced, thereby improving the radiation efficiency.
[0075] In some embodiments provided in this application, there are at least two sinks 111, and the sinks 111 are arranged opposite each other in a direction orthogonal to the extension direction of the middle section 11.
[0076] It should be noted that for the first middle segment 11a, the extension direction of the first middle segment 11a is the first direction x, and for the second middle segment 11b, the extension direction of the first middle segment 11b is the second direction y.
[0077] like Figure 4 As shown, the settling tank 111 includes a first settling tank 111a and a second settling tank 111b. The first settling tank 111a and the second settling tank 111b are located at the same position in the extension direction of the middle section 11. The first settling tank 111a is located on one side of the middle section 11 in a direction orthogonal to its extension direction, and the second settling tank 111b is located on the other side of the middle section 11 in a direction orthogonal to its extension direction.
[0078] Therefore, by setting the sink 111 opposite to the middle section 11, the propagation path of the electrical signal in the middle section 11 is made symmetrical, the symmetry of the radiation pattern of the middle section 11 is improved, and the directivity of the dual-frequency directional antenna 100 provided in this application embodiment is improved.
[0079] In some embodiments provided in this application, there are multiple settling tanks 111, and the multiple settling tanks 111 are arranged at intervals along the extension direction of the middle section 11.
[0080] like Figure 4 As shown, there are multiple first settling tanks 111a and multiple second settling tanks 111b. The multiple first settling tanks 111a are arranged at intervals along the extension direction of the middle section 11, and the multiple second settling tanks 111b are arranged at intervals along the extension direction of the middle section 11.
[0081] Therefore, by setting multiple sinks 111, the effect of the current conducted in the middle section 11 along the extension direction of the middle section 11 in the bending TM03 resonant mode of the sink 111 is further increased, thereby further improving the radiation directivity of the dual-frequency directional antenna 100 provided in the embodiments of this application.
[0082] like Figure 5 c and Figure 5 As shown in d, a sink 111 is provided in the middle section 11, which can effectively improve the radiation directionality of the radiator 10 in TM03 mode and constrain the width of the main lobe within the range of ±45°.
[0083] In some embodiments provided in this application, the first power supply unit 21 is used to input two electrical signals with the same transmission direction to both sides of the first middle section 11a in the first direction x, and the second power supply unit 22 is used to input two electrical signals with the same transmission direction to both sides of the second middle section 11b in the second direction y.
[0084] It should be noted that for the first middle segment 11a, the extension direction of the first middle segment 11a is the first direction x, and for the second middle segment 11b, the extension direction of the first middle segment 11b is the second direction y.
[0085] like Figure 2 As shown, the first power supply unit 21 is connected to the first middle section 11a at its midpoint in the extending direction, and the phase of the electrical signal input from the first power supply unit 21 to one side of the first middle section 11a in the extending direction is the same as the transmission direction of the electrical signal input from the first power supply unit 21 to the other side of the first middle section 11a in the extending direction, thereby forming a [phase / direction] within the first middle section 11a. Figure 2 The direction of the current is shown in the figure.
[0086] The second power supply unit 22 is connected to the second middle section 11b at its midpoint in its extension direction, and the phase of the electrical signal input from the second power supply unit 22 to one side of the second middle section 11b in its extension direction is the same as the transmission direction of the electrical signal input from the second power supply unit 22 to the other side of the second middle section 11b in its extension direction, thereby forming a power supply unit 22 in the first middle section 11a. Figure 2 The direction of the current is shown in the figure.
[0087] Thus, the first power supply section 21 is connected to the middle position of the first middle section 11a, and the second power supply section 22 is connected to the middle position of the second middle section 11b, so that the radiator 10 can be arranged around the power supply network 20, which improves space utilization and reduces the size of the power supply network 20, thereby reducing the sidelobe intensity.
[0088] In some embodiments provided in this application, the middle section 11 includes a through groove 112, which penetrates the middle section 11 along the thickness direction z of the middle section 11 of the radiator 10. The through groove 112 includes a first segment 1121 and a second segment 1122. The first segment 1121 extends along the extension direction of the middle section 11, and the extension direction of the second segment 1122 intersects the extension direction of the middle section 11. One end of the second segment 1122 is connected to the first segment 1121, and the other end of the second segment 1122 is connected to the outer contour of the middle section 11.
[0089] The power supply network 20 is connected to the inner walls on both sides of the second segment 1122 in the extension direction of the middle segment 11.
[0090] In some embodiments (not shown in the figures), the first middle section 11a is provided with a through groove 112, while the second middle section 11b is not provided with a through groove 112.
[0091] In some other embodiments (not shown in the figures), the second middle section 11b is provided with a through groove 112, while the first middle section 11a is not provided with a through groove 112.
[0092] In other embodiments, such as Figure 1 and Figure 2 As shown, both the first middle section 11a and the second middle section 11b are provided with through grooves 112.
[0093] like Figure 5 As shown, the through slot 112 penetrates the middle section 11 along the thickness direction z, and the impedance matching of the middle section 11 in the TM01 and TM03 resonant modes is adjusted by the first segment 1121.
[0094] like Figure 7 As shown, when the middle section 11 and the end section 12 are directly connected, the S-parameters of the dual-band directional antenna 100 provided in this embodiment are as follows: Figure 7 As shown in Figure A, when the middle section 11 and the end section 12 are coupled (not directly) together, the S-parameters of the dual-band directional antenna 100 provided in this embodiment are as follows: Figure 7 As shown in B, it can be seen that the coupling connection method can adjust the frequency ratio of TM01 and TM03 in the resonant mode.
[0095] Figure 7 A and Figure 7 B in the document describes both the standing wave effect of the dual-band directional antenna 100 provided in the embodiments of this application in the 2.4GHz-2.5GHz frequency band and the standing wave effect of the dual-band directional antenna 100 provided in the embodiments of this application in the 5.15GHz-5.85GHz frequency band.
[0096] Depend on Figure 7 and Figure 8 It can be seen that the first segment 1121 provided in the middle segment 11 can adjust the impedance matching of the middle segment 11 in the TM01 and TM03 resonant modes, thereby optimizing the S-parameters of the dual-band directional antenna 100 provided in this application embodiment in the 2.4GHz-2.5GHz and 5.15GHz-5.85GHz frequency bands.
[0097] One end of the second segment 1122 is connected to the first segment 1121, and the other end of the second segment 1122 is connected to the side of the middle segment 11 facing the power supply network 20. The two inner walls of the second segment 1122 are arranged at intervals along the extension direction of the middle segment 11. The first power supply part 21 is connected to the two inner walls of the second segment 1122 of the first middle segment 11a, and the second power supply part 22 is connected to the two inner walls of the second middle segment 11b.
[0098] It should be noted that for the first middle segment 11a, the extension direction of the first segment 1121 is the first direction x, and for the second middle segment 11b, the extension direction of the first segment 1121 is the second direction y.
[0099] Therefore, the current input to the first middle section 11a in the first feed unit 21 is conducted along the first direction x, and the current input to the second middle section 11b in the second feed unit 22 is conducted along the second direction y. This makes the beam polarization direction in the structure of "end 12-first middle section 11a-end 12" in the radiator 10 along the first direction x, and the beam polarization direction in the structure of "end 12-second middle section 11b-end 12" in the radiator 10 along the second direction y. The isolation between the beam in the structure of "end 12-first middle section 11a-end 12" and the beam in the structure of "end 12-second middle section 11b-end 12" in the radiator 10 is improved by polarization isolation.
[0100] In some embodiments provided in this application, the first power supply unit 21 includes a first wire 211 and a second wire 212, the first wire 211 and the second wire 212 are parallel to each other, the first wire 211 is connected between the side wall of the second segment 1122 of the first middle section 11a facing the first direction x and the first port, and the second wire 212 is connected between the side wall of the second segment 1122 of the first middle section 11a facing the other side of the first direction x and the first port.
[0101] like Figure 1 and Figure 3 As shown, the first wire 211 and the second wire 212 extend along the second direction y, and the first wire 211 and the second wire 212 form a parallel double line. Both the first wire 211 and the second wire 212 are connected to the first port, and the transmission directions of the electrical signal input to the first wire 211 at the first port are opposite to those of the electrical signal input to the second wire 212 at the first port. The first wire 211 inputs an electrical signal to the first middle section 11a along one side of the first direction x, and the second wire 212 inputs an electrical signal to the first middle section 11a along the other side of the first direction x. This results in the transmission directions of the electrical signal input to the first middle section 11a by the first wire 211 being the same as those of the electrical signal input to the first middle section 11a by the second wire 212, producing the following effect: Figure 2 The current shown in the figure.
[0102] like Figure 1 and Figure 3 As shown, the first wire 211 is connected between the two first middle sections 11a of the radiator 10, and the second wire 212 is connected between the two first middle sections 11a of the radiator 10.
[0103] The width of the first conductor 211 at the connection point with the first port is greater than the width of the second conductor 212 at the connection point with the first middle section 11a. The width of the second conductor 212 at the connection point with the first port is greater than the width of the second conductor 212 at the connection point with the first middle section 11a, thereby optimizing the input impedance of the first power supply section 21.
[0104] In some embodiments provided in this application, the second power supply section 22 includes a third wire 221 and a fourth wire 222, which are parallel to each other. The third wire 221 is connected between the side wall of the second segment 1122 of the second middle section 11b facing the second direction y and the second port, and the fourth wire 222 is connected between the side wall of the second segment 1122 of the second middle section 11b facing the other side of the second direction y and the second port.
[0105] like Figure 1 and Figure 2 As shown, the third wire 221 and the fourth wire 222 extend along the first direction x, and the third wire 221 and the fourth wire 222 form a parallel double line. Both the third wire 221 and the fourth wire 222 are connected to the second port, and the electrical signal input to the third wire 221 at the second port has the opposite transmission direction to the electrical signal input to the fourth wire 222 at the second port. The third wire 221 inputs an electrical signal to the second middle section 11b along one side of the second direction y, and the fourth wire 222 inputs an electrical signal to the second middle section 11b along the other side of the second direction y, so that the transmission direction of the electrical signal input to the second middle section 11b by the third wire 221 is the same as the transmission direction of the electrical signal input to the second middle section 11b by the fourth wire 222, and a current in the same direction is generated in the second middle section 11b.
[0106] like Figure 1 and Figure 2 As shown, the third wire 221 is connected between the two second middle sections 11b of the radiator 10, and the fourth wire 222 is connected between the two second middle sections 11b of the radiator 10.
[0107] The width of the connection between the third conductor 221 and the second port is greater than the width of the connection between the third conductor 221 and the second middle section 11b, and the width of the connection between the fourth conductor 222 and the second port is greater than the width of the connection between the fourth conductor 222 and the second middle section 11b, thereby optimizing the input impedance of the second power supply section 22.
[0108] In some embodiments provided in this application, the dual-band directional antenna 100 further includes a substrate 30. The substrate 30 includes a first surface 31 and a second surface 32 that are parallel to each other and spaced apart. The radiator 10 is disposed on the first surface 31, the first feed part 21 is disposed on the first surface 31, the second feed part 22 is disposed on the second surface 32, and the second feed part 22 is connected to the radiator 10 through a metallized via.
[0109] In some embodiments provided in this application, the substrate 30 may be made of one or more materials with low dielectric constant, such as FR4 (epoxy resin-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic-filled hydrocarbon material), etc.
[0110] In some embodiments, the dielectric substrate 30 is FR4 (epoxy resin-based glass fiber composite material), and the dielectric constant of the dielectric substrate 30 is 4.4.
[0111] like Figure 1 , Figure 2 and Figure 3 As shown, the radiator 10 and the power supply network 20 are disposed on the same substrate 30, and the first conductor 211 and the second conductor 212 are both disposed on the second surface 32, the third conductor 221 and the fourth conductor 222 are both disposed on the first surface 31, and the third conductor 221 and the fourth conductor 222 are connected to the second middle section 11b through metallized vias.
[0112] In some other embodiments (not shown in the figures), the first wire 211 and the third wire 221 are disposed on the first surface 31, and the second wire 212 and the fourth wire 222 are disposed on the second surface 32. The second wire 212 is connected to the first middle section 11a through a metallized via, and the fourth wire 222 is connected to the second middle section 11b through a metallized via.
[0113] Therefore, the dual-band directional antenna 100 provided in this application embodiment has the advantage of realizing dual-port dual-band communication on a single circuit board.
[0114] In some embodiments provided in this application, the dual-frequency directional antenna 100 provided in this application includes a reflector 40, which is arranged parallel to and spaced apart from the substrate 30.
[0115] In some embodiments, the reflector 40 and the radiator 10 are located on opposite sides of the substrate 30 in the thickness direction z.
[0116] The communication device provided in the embodiments of this application is described below.
[0117] The communication device provided in this application includes the dual-band directional antenna 100 in any of the above embodiments.
[0118] The dual-band directional antenna 100 provided in this application embodiment has the advantage of being able to realize dual-port dual-band directional communication, thereby enabling the communication device provided in this application embodiment to also have the advantage of being able to realize dual-port dual-band directional communication.
[0119] 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 dual-frequency directional antenna, characterized in that, include: A radiator comprising a plurality of midsections and a plurality of end sections, the midsections comprising a first midsection and a second midsection, the first midsection extending along a first direction and coupled between two end sections spaced apart along the first direction, the second midsection extending along a second direction and coupled between two end sections spaced apart along the second direction, the first direction intersecting the second direction; A power supply network, comprising a first power supply section and a second power supply section, wherein the first power supply section is used to connect between a first port and a first middle section, and the second power supply section is used to connect between a second port and a second middle section.
2. The dual-frequency directional antenna as described in claim 1, characterized in that: The middle section includes a settling trough, which is recessed on one side of the middle section orthogonal to its extension direction.
3. The dual-frequency directional antenna as described in claim 2, characterized in that: There are at least two settling tanks, and the settling tanks are arranged opposite each other in a direction orthogonal to the extension direction of the middle section.
4. The dual-frequency directional antenna as described in claim 2, characterized in that: There are multiple settling tanks, which are arranged at intervals along the extension direction of the middle section.
5. The dual-frequency directional antenna as described in claim 1, characterized in that: The first power supply unit is used to input two electrical signals with the same transmission direction to both sides of the first middle section facing the first direction, and the second power supply unit is used to input two electrical signals with the same transmission direction to both sides of the second middle section facing the second direction.
6. The dual-frequency directional antenna as described in claim 5, characterized in that: The middle section includes a through groove that extends through the middle section along its thickness direction. The through groove includes a first section and a second section. The first section extends along the extension direction of the middle section, and the extension direction of the second section intersects with the extension direction of the middle section. One end of the second section is connected to the first section, and the other end of the second section is connected to the outer contour of the middle section. The power supply network is connected to the inner walls of both sides of the second segment in the extension direction of the middle segment.
7. The dual-frequency directional antenna as described in claim 6, characterized in that: The first power supply section includes a first wire and a second wire, which are parallel to each other. The first wire is connected to the side wall of the second segment of the first middle section facing the first direction and is also connected to the first port. The second wire is connected to the side wall of the second segment of the first middle section facing the other direction and is also connected to the first port. The second power supply section includes a third wire and a fourth wire, which are parallel to each other. The third wire is connected to the side wall of the second segment of the second middle section facing the second direction and is also connected to the second port. The fourth wire is connected to the side wall of the second segment of the second middle section facing the other direction and is also connected to the second port.
8. The dual-frequency directional antenna as described in claim 7, characterized in that: The dual-frequency directional antenna further includes a substrate, which includes a first surface and a second surface that are parallel to each other and spaced apart. The radiator is disposed on the first surface, the first feed part is disposed on the first surface, the second feed part is disposed on the second surface, and the second feed part is connected to the radiator through a metallized via.
9. The dual-frequency directional antenna as described in any one of claims 1-8, characterized in that: The first direction is orthogonal to the second direction.
10. A communication device, characterized in that, Includes a dual-frequency directional antenna as described in any one of claims 1-9.