Dual-polarized antenna
By setting orthogonal dipole antennas and irregular hexagonal radiating elements on the front and back of the dielectric substrate, the problems of complex structure and poor stability of broadband dual-polarized antennas are solved, achieving the effects of simplified structure and improved isolation.
Patent Information
- Application Number
- CN202210125970.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-02-10
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2042-02-10
AI Technical Summary
Existing broadband dual-polarized antennas have complex structures, are easily interfered with by interference signals, and have poor stability.
The first and second dipole antennas with identical structures are set on the front and back of the dielectric substrate and arranged orthogonally. Combined with the design of irregular hexagonal radiating dipoles and grounding dipoles, the feeding is achieved through a coplanar feeding structure, which reduces the occupied area and interference.
The structure of the dual-polarized antenna has been simplified, port isolation and stability have been improved, and multiple frequency bands have been covered, enhancing bandwidth and frequency band coverage capabilities.
Smart Images
Figure CN114374080B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mobile communication technology, and more particularly to a dual-polarized antenna. Background Technology
[0002] In mobile communication systems, wireless communication devices convert circuit signals into electromagnetic wave signals using antennas. As the transceiver of the wireless communication device, the antenna directly impacts the communication performance of the entire mobile communication system. With the rapid development of mobile communication technology, new frequency bands are constantly being developed and utilized. For example, 2G, 3G, and LTE (4G) systems cover the 690-960MHz and 1710-2690MHz frequency bands, while 5G systems cover the 3300-5925MHz frequency band. Therefore, using broadband antennas can simultaneously cover multiple operating frequency bands of the mobile communication system, reducing the number of antennas and lowering costs. Currently, broadband dual-polarized antennas are commonly used. These antennas combine the advantages of broadband and dual-polarized antennas, covering multiple operating frequency bands of the mobile communication system while increasing system capacity, and are therefore widely used.
[0003] However, existing broadband dual-polarized antennas use a multi-frequency design, which involves designing multiple branches to achieve multi-frequency resonance and thus broadband operation. This multi-frequency design makes the antenna radiator design complex, susceptible to interference signals, and has poor stability. Summary of the Invention
[0004] This invention provides a dual-polarized antenna to solve the problem of poor structural stability of dual-polarized antennas.
[0005] A dual-polarized antenna includes a dielectric substrate, a first dipole antenna, and a second dipole antenna;
[0006] The first dipole antenna is disposed on the front side of the dielectric substrate, and the second dipole antenna is disposed on the back side of the dielectric substrate;
[0007] The first dipole antenna and the second dipole antenna are orthogonal to each other.
[0008] Furthermore, the first dipole antenna and the second dipole antenna are dipole antennas with the same structure, and the dipole antenna includes a radiating element and a grounding element;
[0009] The radiating oscillator includes a first oscillator body and an extension extending from the first oscillator body;
[0010] The grounding vibrator includes a second vibrator body, on which a grounding groove is provided;
[0011] The extension is fitted into the grounding groove, forming a gap between it and the grounding groove.
[0012] Furthermore, the first oscillator body and the second oscillator body are centrally symmetrical and axially symmetrical.
[0013] Furthermore, the outer contours of the first oscillator body and the second oscillator body are irregular hexagons. An angle on the first oscillator body away from the center of symmetry, an angle on the second oscillator body away from the center of symmetry, and the center of symmetry form an axis of symmetry. The first oscillator body and the second oscillator body are axially symmetric based on the axis of symmetry.
[0014] Furthermore, the first oscillator body includes a first notch aperture, which is located near the position corresponding to the angle in the first oscillator body that is farthest from the center of symmetry.
[0015] The second oscillator body includes a second notch aperture, which is located at the position corresponding to the angle furthest from the center of symmetry in the second oscillator body.
[0016] Furthermore, the dipole antenna also includes a coplanar feeding structure, which includes a first feeding structure and a second feeding structure;
[0017] The first feeding structure is connected to the radiating element and the grounding element of the first dipole antenna;
[0018] The second feeding structure is connected to the radiating element and the grounding element of the second dipole antenna.
[0019] Furthermore, the first power supply structure includes a first power supply pad and a first grounding pad;
[0020] The first feed pad is disposed on the radiating element in the first dipole antenna;
[0021] The first grounding pad is disposed on the grounding element in the first dipole antenna.
[0022] Furthermore, the second power supply structure includes a second power supply pad and a second grounding pad;
[0023] The second power supply pad and the second grounding pad are disposed on the front side of the dielectric substrate;
[0024] The second feed pad is connected to the radiating element in the second dipole antenna through the first through hole;
[0025] The second grounding pad is connected to the grounding element in the second dipole antenna through the second through hole.
[0026] Furthermore, the second grounding pad is U-shaped, and the second power supply pad is located within the area enclosed by the second grounding pad, and the second power supply pad and the second grounding pad do not intersect.
[0027] Furthermore, the angle between any two adjacent oscillators ranges from 6 to 12 degrees.
[0028] This invention provides a dual-polarized antenna, which includes a dielectric substrate, a first dipole antenna, and a second dipole antenna. By placing the first dipole antenna on the front side of the dielectric substrate and the second dipole antenna on the back side of the dielectric substrate, and by making the first dipole antenna and the second dipole antenna orthogonal to each other, the structure of the dual-polarized antenna can be simplified while ensuring the overall function of the dual-polarized antenna, and the port isolation of the dual-polarized antenna can be improved. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of a dual-polarized antenna in one embodiment of the present invention;
[0031] Figure 2 This is another structural schematic diagram of a dual-polarized antenna in one embodiment of the present invention;
[0032] Figure 3 This is another structural schematic diagram of a dual-polarized antenna in one embodiment of the present invention;
[0033] Figure 4 This is a bandwidth simulation diagram of a dual-polarized antenna in one embodiment of the present invention;
[0034] Figure 5 This is a schematic diagram of the feeding method of a dual-polarized antenna in one embodiment of the present invention.
[0035] In the figure: 1. Dielectric substrate; 2. Radiation oscillator; 21. First oscillator body; 211. First notch aperture; 22. Extension; 3. Grounding oscillator; 31. Second oscillator body; 311. Second notch aperture; 32. Grounding groove; 4. First power supply structure; 41. First power supply pad; 42. First grounding pad; 5. Second power supply structure; 51. Second power supply pad; 52. Second grounding pad; 61. Grounding hole. Detailed Implementation
[0036] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0037] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0039] This embodiment provides a dual-polarized antenna, such as Figure 1 As shown, it includes a dielectric substrate 1, a first dipole antenna, and a second dipole antenna; the first dipole antenna is disposed on the front (TOP) side of the dielectric substrate 1, and the second dipole antenna is disposed on the back (BOTTON) side of the dielectric substrate 1; the first dipole antenna and the second dipole antenna are orthogonal to each other.
[0040] As an example, the dual-polarized antenna includes a dielectric substrate 1, a first dipole antenna, and a second dipole antenna. The first dipole antenna is disposed on the front (TOP) side of the dielectric substrate 1, and the second dipole antenna is disposed on the back (BOTTON) side of the dielectric substrate 1, and the first and second dipole antennas are orthogonal to each other. In this example, the dielectric substrate 1 is a double-sided panel. Optionally, the dielectric substrate 1 is a substrate with a certain flame-retardant material grade. Preferably, the dielectric substrate 1 is a substrate with an FR-4 flame-retardant material grade; for example, the dielectric substrate 1 can be one of an insulating board, epoxy board, epoxy resin board, and brominated epoxy resin board with an FR-4 flame-retardant material grade. Preferably, the dielectric constant of the dielectric substrate 1 is 4.3. The first dipole antenna is disposed on the front (TOP) side of the dielectric substrate 1, and the polarization direction of the first dipole antenna is -45 degrees. The second dipole antenna is disposed on the back (BOTTON) side of the dielectric substrate 1, and the polarization direction of the second dipole antenna is +45 degrees, to form a + / -45 degree dual-polarized antenna.
[0041] As an example, this application, by respectively placing the first dipole antenna and the second dipole antenna on the front (TOP) and back (BOTTON) surfaces of the dielectric substrate 1, while ensuring that the dielectric substrate 1 has a reasonable thickness, when feeding the first and second dipole antennas through feed signal lines, since the first and second dipole antennas are respectively placed on the front (TOP) and back (BOTTON) surfaces of the dielectric substrate 1 at a certain distance, mutual interference between the feed signal lines feeding the first dipole antenna and the feed signal lines feeding the second dipole antenna can be avoided, thereby improving the port isolation of the dual-polarized antenna. Preferably, the thickness of the dielectric substrate 1 can be set according to actual needs. For example, the thickness of the dielectric substrate 1 is 0.8 mm.
[0042] In this embodiment, the dual-polarized antenna includes a dielectric substrate 1, a first dipole antenna, and a second dipole antenna. By placing the first dipole antenna on the front (TOP) side of the dielectric substrate 1 and the second dipole antenna on the back (BOTTON) side of the dielectric substrate 1, and making the first and second dipole antennas orthogonal to each other, the structure of the dual-polarized antenna can be simplified while ensuring the overall function of the dual-polarized antenna, and the port isolation of the dual-polarized antenna can be improved.
[0043] In one embodiment, such as Figure 1As shown, the first dipole antenna and the second dipole antenna are dipole antennas with the same structure. The dipole antenna includes a radiating element 2 and a grounding element 3. The radiating element 2 includes a first element body 21 and an extension 22 extending from the first element body 21. The grounding element 3 includes a second element body 31, and a grounding groove 32 is provided on the second element body 31. The extension 22 is assembled in the grounding groove 32, forming a gap between it and the grounding groove 32.
[0044] As an example, the first dipole antenna and the second dipole antenna are dipole antennas with identical structures. The dipole antenna includes a radiating element 2 and a grounding element 3. The radiating element 2 includes a first element body 21 and an extension 22 extending from the first element body 21. The grounding element 3 includes a second element body 31, on which a grounding groove 32 is provided. The extension 22 is fitted within the grounding groove 32, forming a gap between it and the grounding groove 32. In this embodiment, both the first and second dipole antennas include a radiating element 2 and a grounding element 3, with the extension 22 of the radiating element 2 fitted within the grounding groove 32 of the grounding element 3, forming a gap between it and the grounding groove 32. It should be noted that by extending an extension 22 on the first dipole body 21 and providing a grounding groove 32 on the second dipole body 31, the extension 22 of the radiating dipole 2 is assembled in the grounding groove 32 of the grounding dipole 3, and a gap is formed between the extension 22 and the grounding groove 32, making the assembly of the first dipole antenna and the second dipole antenna structure more convenient and reducing the area occupied by the first dipole antenna and the second dipole antenna.
[0045] In this embodiment, the dipole antenna includes a radiating element 2 and a grounding element 3. The radiating element 2 includes a first element body 21 and an extension 22 extending from the first element body 21. The grounding element 3 includes a second element body 31, on which a grounding groove 32 is provided. In this embodiment, by assembling the extension 22 within the grounding groove 32, forming a gap between the extension 22 and the grounding groove 32, the assembly of the first and second dipole antenna structures is made more convenient, and the occupied area of the first and second dipole antennas is reduced.
[0046] In one embodiment, such as Figure 1 As shown, the first oscillator body 21 and the second oscillator body 31 are centrally symmetrical and axially symmetrical.
[0047] As an example, the first dipole body 21 and the second dipole body 31 are centrally symmetrical. For example, the second dipole body 31 can be obtained by rotating the first dipole body 21 by 180 degrees around the center of symmetry, so that the polarization direction of the first dipole antenna is -45 degrees and the polarization direction of the second dipole antenna is +45 degrees.
[0048] As an example, the first oscillator body 21 and the second oscillator body 31 are axially symmetrical. In this embodiment, the first oscillator body 21 and the second oscillator body 31 are symmetrical about the same axis of symmetry.
[0049] In this embodiment, as Figure 1 As shown, the first dipole body 21 and the second dipole body 31 are centrally symmetrical and axially symmetrical, so that the polarization direction of the first dipole antenna is -45 degrees and the polarization direction of the second dipole antenna is +45 degrees.
[0050] In one embodiment, the outer contours of the first oscillator body 21 and the second oscillator body 31 are irregular hexagonal shapes. The angles of the first oscillator body 21 away from the center of symmetry, the angles of the second oscillator body 31 away from the center of symmetry, and the center of symmetry form an axis of symmetry. The first oscillator body 21 and the second oscillator body 31 are axially symmetric based on the axis of symmetry.
[0051] As an example, the irregular hexagon can be any hexagon other than a regular hexagon. In this example, the outer contours of the first oscillator body 21 and the second oscillator body 31 are set to irregular hexagons. Preferably, while setting the outer contours of the first oscillator body 21 and the second oscillator body 31 to irregular hexagons, the half-perimeter of the first oscillator body 21 and the second oscillator body 31 is a quarter wavelength of the low-frequency band to improve the bandwidth of the dual-polarized antenna.
[0052] As an example, the angles on the first dipole body 21 away from the center of symmetry, the angles on the second dipole body 31 away from the center of symmetry, and the center of symmetry form an axis of symmetry. The first dipole body 21 and the second dipole body 31 are axially symmetric based on the axis of symmetry, so that the first dipole body 21 and the second dipole body 31 are axially symmetric based on the same axis of symmetry, so as to achieve a polarization direction of -45 degrees for the first dipole antenna and a polarization direction of +45 degrees for the second dipole antenna.
[0053] In this embodiment, the outer contours of the first dipole body 21 and the second dipole body 31 are irregular hexagonal shapes, which improves the bandwidth of the dual-polarized antenna. The angles of the first dipole body 21 away from the center of symmetry, the angles of the second dipole body 31 away from the center of symmetry, and the center of symmetry form an axis of symmetry. The first dipole body 21 and the second dipole body 31 are axially symmetric based on the axis of symmetry, so that the polarization direction of the first dipole antenna is -45 degrees and the polarization direction of the second dipole antenna is +45 degrees.
[0054] In one embodiment, such as Figure 1As shown, the first oscillator body 21 includes a first notch aperture 211, which is located near the angle furthest from the center of symmetry in the first oscillator body 21; the second oscillator body 31 includes a second notch aperture 311, which is located near the angle furthest from the center of symmetry in the second oscillator body 31.
[0055] As an example, the first oscillator body 21 includes a first notch aperture 211 located near the angle furthest from the center of symmetry in the first oscillator body 21. The second oscillator body 31 includes a second notch aperture 311 located near the angle furthest from the center of symmetry in the second oscillator body 31. In this example, by setting the first notch aperture 211 on the first oscillator body 21 and the second notch aperture 311 on the second oscillator body 31, the current in the dual-polarized antenna is concentrated on the first notch aperture 211 and the second notch aperture 311, forming a ring standing wave, thus achieving the notch effect. This enables the dual-polarized antenna in this application to achieve coverage of both the low-frequency band and the high-frequency band, i.e., dual-band coverage.
[0056] As an example, the perimeters of the first notch aperture 211 and the second notch aperture 311 satisfy a wavelength of 3800MHz. For example, the first notch aperture 211 can be a triangle, an irregular quadrilateral, or an irregular pentagon. Preferably, the first notch aperture 211 and the second notch aperture 311 are irregular pentagons.
[0057] As an example, such as Figure 4 As shown in the figure, S2 is the simulated bandwidth curve of the dual-polarized antenna before the addition of the first notch aperture 211 and the second notch aperture 311. The bandwidth of the dual-polarized antenna meets the requirement of 1452-5925MHz. S1 is the simulated bandwidth curve after the addition of the first notch aperture 211 and the second notch aperture 311. At 3300-4200MHz, the return loss increases significantly, the impedance is destroyed, and the notch function is realized. Thus, the dual-polarized antenna in this application can achieve coverage of both the low-frequency band and the high-frequency end, that is, dual-band coverage.
[0058] In this embodiment, the first oscillator body 21 includes a first notch aperture 211, and the second oscillator body 31 includes a second notch aperture 311. By setting the first notch aperture 211 at the position corresponding to the angle furthest from the center of symmetry in the first oscillator body 21, and setting the second notch aperture 311 at the position corresponding to the angle furthest from the center of symmetry in the second oscillator body 31, the dual-polarized antenna in this application can achieve coverage of both the low-frequency band and the high-frequency end, i.e., dual-band coverage.
[0059] In one embodiment, the dipole antenna further includes a coplanar feeding structure, which includes a first feeding structure 4 and a second feeding structure 5; the first feeding structure 4 is connected to the radiating element 2 and the grounding element 3 of the first dipole antenna; and the second feeding structure 5 is connected to the radiating element 2 and the grounding element 3 of the second dipole antenna.
[0060] As an example, both the first feeding structure 4 and the second feeding structure 5 are disposed on the front TOP of the dielectric substrate 1, that is, on the same side as the first dipole antenna.
[0061] As an example, since the first dipole antenna is also disposed on the front TOP of the dielectric substrate 1, the first feeding structure 4 can be directly connected to the radiating element 2 and the grounding element 3 of the first dipole antenna.
[0062] As an example, since the second feeding structure 5 is disposed on the front TOP of the dielectric substrate 1 and the second dipole antenna is disposed on the back BOTTON of the dielectric substrate 1, the second feeding structure 5 can be connected to the radiating element 2 and the grounding element 3 of the second dipole antenna through the through holes on the dielectric substrate 1.
[0063] As an example, such as Figure 5 As shown, the power supply signal line is perpendicular to the dielectric substrate 1 and connected to the coplanar power supply structure, and is fed from the back side BOTTON of the dielectric substrate 1 to the front side TOP of the dielectric substrate 1.
[0064] In this embodiment, the dipole antenna further includes a coplanar feeding structure. The coplanar feeding structure includes a first feeding structure 4 and a second feeding structure 5. The first feeding structure 4 is connected to the radiating element 2 and the grounding element 3 of the first dipole antenna, and the second feeding structure 5 is connected to the radiating element 2 and the grounding element 3 of the second dipole antenna, facilitating the feeding of the first dipole antenna and the second dipole antenna located on the front TOP and back BOTTON of the dielectric substrate 1, respectively.
[0065] In one embodiment, such as Figure 3 As shown, the first feeding structure 4 includes a first feeding pad 41 and a first grounding pad 42; the first feeding pad 41 is disposed on the radiating element 2 in the first dipole antenna; the first grounding pad 42 is disposed on the grounding element 3 in the first dipole antenna.
[0066] As an example, a first feed pad 41 is disposed on the radiating element 2 of the first dipole antenna. A first ground pad 42 is disposed on the grounding element 3 of the first dipole antenna. In this embodiment, the first feed pad 41 is used to connect the feed wire in the feed signal line, and the first ground pad 42 is used to connect the ground wire in the feed signal line. By disposing the first feed pad 41 on the radiating element 2 of the first dipole antenna and the first ground pad 42 on the grounding element 3 of the first dipole antenna, the feed structure is simplified and the effectiveness of feeding power to the dual-polarized antenna is improved.
[0067] As an example, the first feed pad 41 includes a pad body and a pad connection portion extending from the pad body, the pad connection portion being connected to the extension 22 of the radiating element 2 in the first dipole antenna. In this example, connecting the pad connection portion to the extension 22 of the radiating element 2 in the first dipole antenna reduces the area occupied by the first feed structure 4.
[0068] As an example, the pad body is a ring-shaped pad body. Preferably, the pad body is a circular ring-shaped pad body. In this example, by setting the pad body to a circular ring-shaped pad body, it is easier to solder the power supply signal lines, thereby achieving a good power supply effect.
[0069] As an example, the first grounding pad 42 includes at least one solder hole disposed around the grounding groove 32 of the grounding element 3 in the first dipole antenna. This solder hole is used to connect the grounding wire in the feed signal line. Optionally, the number of solder holes can be selected according to actual needs to achieve a good grounding effect.
[0070] In this embodiment, by setting the first feed pad 41 on the radiating element 2 in the first dipole antenna and setting the first ground pad 42 on the grounding element 3 in the first dipole antenna, the feed structure is simplified and the effectiveness of feeding the dual-polarized antenna is improved.
[0071] In one embodiment, such as Figure 3 As shown, the second feeding structure 5 includes a second feeding pad 51 and a second grounding pad 52; the second feeding pad 51 and the second grounding pad 52 are disposed on the front TOP of the dielectric substrate 1; the second feeding pad 51 is connected to the radiating element 2 in the second dipole antenna through a first through hole; the second grounding pad 52 is connected to the grounding element 3 in the second dipole antenna through a second through hole.
[0072] As an example, the second grounding pad 52 is U-shaped, and the second power supply pad 51 is located within the area enclosed by the second grounding pad 52. The second power supply pad 51 and the second grounding pad 52 do not intersect.
[0073] As an example, the second feed pad 51 is used to connect the feed wire in the feed signal line and is connected to the radiating element 2 in the second dipole antenna through the first through hole; the second ground pad 52 is used to connect the ground wire in the feed signal line and is connected to the grounding element 3 in the second dipole antenna through the third through hole.
[0074] As an example, the second feed pad 51 has the same structure as the first feed pad 41, that is, the second feed pad 51 includes a pad body and a pad connection portion extending from the pad body, and the pad connection portion is connected to the extension portion 22 of the radiating element 2 in the second dipole antenna. In this example, by connecting the pad connection portion to the extension portion 22 of the radiating element 2 in the first dipole antenna, the area occupied by the first feed structure 4 can be reduced.
[0075] As an example, the second feed pad 51 is connected to the radiating element 2 in the second dipole antenna through the first through-hole. In this embodiment, the pad body in the second feed pad 51 is connected to the extension 22 of the radiating element 2 in the second dipole antenna through the first through-hole.
[0076] As an example, the second grounding pad 52 includes a U-shaped grounding pad body and solder holes disposed on the U-shaped grounding pad. These solder holes are used to connect the grounding wire in the feed signal line and to the grounding element 3 in the second dipole antenna. For example, the solder holes in the grounding pad body connect to the solder holes surrounding the grounding groove 32 in the grounding element 3 of the second dipole antenna through a second through-hole. Optionally, the number of solder holes can be selected according to actual needs to achieve a good grounding effect. For example, the second grounding pad 52 is connected to the grounding wire in the feed signal line and to the grounding element 3 in the second dipole antenna through seven solder holes, ensuring good grounding and providing good impedance continuity.
[0077] In this embodiment, the second feeding structure 5 includes a second feeding pad 51 and a second grounding pad 52. By placing the second feeding pad 51 and the second grounding pad 52 on the front TOP of the dielectric substrate 1, connecting the second feeding pad 51 to the radiating element 2 in the second dipole antenna through a first through hole, and connecting the second grounding pad 52 to the grounding element 3 in the second dipole antenna through a second through hole, it is possible to feed the second dipole antenna while reducing the area occupied by the first feeding structure 4.
[0078] In one embodiment, such as Figure 2 As shown, the angle between any two adjacent oscillators ranges from 6 to 12 degrees.
[0079] As an example, based on the broadband principle of dual-polarized antennas, the first and second dipole antennas, respectively positioned on the front (TOP) and back (BOTTON) surfaces of the dielectric substrate 1, are similar to parasitic antennas, generating additional resonant points and thus extending the bandwidth. Therefore, the spacing and angle between the elements in the first and second dipole antennas have a significant impact on the bandwidth of the dual-polarized antenna. In this example, by positioning the first and second dipole antennas on the front (TOP) and back (BOTTON) surfaces of the dielectric substrate 1, respectively, and setting the outer contours of the first element body 21 and the second element body 31 of the first and second dipole antennas to irregular hexagonal shapes, while ensuring that the angle between any two adjacent elements is within the range of 6-12 degrees, it is possible to improve both the bandwidth and isolation of the dual-polarized antenna. Preferably, the angle between any two adjacent elements is 8 degrees. For example... Figure 2 As shown, when the angle α between any two adjacent elements is 8 degrees, the dual-polarized antenna in this example has good isolation in both the low-frequency band (1452-2690MHz) and the high-frequency band (5180-5925MHz).
[0080] It should be noted that, as Figure 2 As shown, the overlapping area of the first dipole antenna and the second dipole antenna in the vertical direction is P. By adjusting this overlapping area P, the coupling between the first dipole antenna and the second dipole antenna can be adjusted, thereby adjusting the port impedance of the dual-polarized antenna.
[0081] In this embodiment, by making the outer contour shape of the first dipole body 21 in the first dipole antenna and the second dipole body 31 in the second dipole antenna irregular hexagonal, and by making the angle between any two adjacent dipoles range from 6 to 12 degrees, it is possible to improve the bandwidth of the dual-polarized antenna while improving the isolation of the dual-polarized antenna.
[0082] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.
Claims
1. A dual-polarized antenna, characterized in that, It includes a dielectric substrate, a first dipole antenna, and a second dipole antenna; The first dipole antenna is disposed on the front side of the dielectric substrate, and the second dipole antenna is disposed on the back side of the dielectric substrate; The first dipole antenna and the second dipole antenna are orthogonal to each other; The first dipole antenna and the second dipole antenna are dipole antennas with the same structure, and the dipole antenna includes a radiating element and a grounding element; The radiating oscillator includes a first oscillator body and an extension extending from the first oscillator body; The grounding vibrator includes a second vibrator body, on which a grounding groove is provided; The extension is fitted into the grounding groove, forming a gap with the grounding groove; The outer contours of the first oscillator body and the second oscillator body are irregular hexagonal shapes; The first oscillator body includes a first notch aperture, which is located near the angle in the first oscillator body that is furthest from the center of symmetry. The second oscillator body includes a second notch aperture, which is located at the position corresponding to the angle furthest from the center of symmetry in the second oscillator body; The current in the dual-polarized antenna is concentrated on the first notch and the second notch, forming a ring standing wave; The angle between any two adjacent oscillators is in the range of 6-12 degrees.
2. The dual-polarized antenna as described in claim 1, characterized in that, The first oscillator body and the second oscillator body are centrally symmetrical and axially symmetrical.
3. The dual-polarized antenna as described in claim 1, characterized in that, An angle on the first oscillator body away from the center of symmetry, an angle on the second oscillator body away from the center of symmetry, and the center of symmetry form an axis of symmetry. The first oscillator body and the second oscillator body are axially symmetric based on the axis of symmetry.
4. The dual-polarized antenna as described in claim 1, characterized in that, The dipole antenna further includes a coplanar feeding structure, which includes a first feeding structure and a second feeding structure. The first feeding structure is connected to the radiating element and the grounding element of the first dipole antenna; The second feeding structure is connected to the radiating element and the grounding element of the second dipole antenna.
5. The dual-polarized antenna as described in claim 4, characterized in that, The first power supply structure includes a first power supply pad and a first grounding pad; The first feed pad is disposed on the radiating element in the first dipole antenna; The first grounding pad is disposed on the grounding element in the first dipole antenna.
6. The dual-polarized antenna as described in claim 4, characterized in that, The second power supply structure includes a second power supply pad and a second grounding pad; The second power supply pad and the second grounding pad are disposed on the front side of the dielectric substrate; The second feed pad is connected to the radiating element in the second dipole antenna through the first through hole; The second grounding pad is connected to the grounding element in the second dipole antenna through the second through hole.
7. The dual-polarized antenna as described in claim 6, characterized in that, The second grounding pad is U-shaped, and the second power supply pad is located within the area enclosed by the second grounding pad. The second power supply pad and the second grounding pad do not intersect.
Citation Information
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