Dual-polarized antenna and communication equipment
By designing a dielectric substrate, metal ground plane, front antenna body, and back coupling feed line structure in a dual-polarized antenna, electromagnetic waves of different polarizations are excited by different feeding methods. This solves the problems of high cost, large space occupation, and high assembly difficulty of existing dual-polarized antennas, and achieves a high-performance dual-polarization effect at a high cost.
Patent Information
- Application Number
- CN202422936933.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing dual-polarized antennas are expensive, space-consuming, and difficult to assemble, making it difficult to meet the market's demand for high cost-performance.
Design a dual-polarized antenna, including a dielectric substrate, a metal ground plane, a front antenna body, and a rear-coupled feed line structure. The metal ground plane is connected to the dielectric substrate. The front antenna body and the rear-coupled feed line are respectively located on opposite sides of the dielectric substrate. Different feeding methods are used to excite electromagnetic waves with different polarizations to achieve dual polarization.
It achieves a simple structure and is easy to assemble, reducing manufacturing costs. It also achieves dual polarization through a single antenna, improving spectrum efficiency and channel capacity, and enhancing communication quality.
Smart Images
Figure CN223462407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of antennas, and in particular to a dual-polarization antenna and communication equipment. Background Art
[0002] With the rapid development of mobile broadband services, a wide range of applications, such as video and the Internet of Things, are emerging, and user data traffic demand is growing rapidly. In densely built-up urban areas, electromagnetic waves are reflected multiple times by buildings and travel through different propagation paths before reaching the receiver, resulting in multipath fading. Dual-polarized antennas utilize polarization diversity technology, which not only mitigates the effects of multipath fading but also improves spectrum efficiency, increases channel capacity, and saves space, thereby improving communication quality. These antennas are widely used in base station communications.
[0003] Antennas, as a crucial component of communication systems, not only have high performance requirements but also high requirements for size and cost. Existing dual-polarization antennas mostly utilize two antennas positioned in different locations, which has drawbacks such as high cost, large space requirements, and difficulty in assembly. To meet market demand for cost-effective antennas, a simple, low-cost, compact, and easy-to-assemble dual-polarization antenna is urgently needed. Utility Model Content
[0004] The purpose of the utility model is to provide a dual-polarization antenna and a communication device, which have a simple structure, are easy to assemble, and can reduce production costs.
[0005] The embodiment of the present utility model is achieved as follows:
[0006] In one aspect, the present invention provides a dual-polarized antenna comprising a dielectric plate, a metal floor, a front antenna body, and a rear-coupling feeder circuit structure. The dielectric plate is connected to the metal floor, the front antenna body has a slot, and the front antenna body and the rear-coupling feeder circuit structure are disposed on opposite sides of the dielectric plate. The metal floor has a first grounding point connected to the outer conductor of a feeder cable. The front antenna body also has a first feeding point connected to the inner conductor of the feeder cable. The rear-coupling feeder circuit structure has a second feeding point connected to the inner conductor of the feeder cable. This dual-polarized antenna has a simple structure, is easy to assemble, and can reduce manufacturing costs.
[0007] Optionally, the metal floor is vertically connected to the dielectric plate.
[0008] Optionally, the metal floor has a through-hole, and the through-hole is used for allowing an inner conductor of the feeder cable to pass through.
[0009] Optionally, the first grounding points are two, and the two first grounding points are distributed on opposite sides of the first feeding point.
[0010] Optionally, a projection of the gap along a first direction is between the two first grounding points, and the first direction is perpendicular to a thickness direction of the dielectric plate.
[0011] Optionally, the gap is located at a central axis of the front antenna body.
[0012] Optionally, the front antenna body is a symmetrical structure.
[0013] Optionally, a projection of the back coupling feeding line structure on the front antenna body passes through the gap.
[0014] In another aspect, the utility model provides a kind of communication equipment, and the communication equipment includes the dual-polarized antenna described above.
[0015] The utility model has the beneficial effects including:
[0016] The dual-polarized antenna provided in the application includes a dielectric plate, a metal ground plate, a front antenna body and a back coupling feeding line structure; the dielectric plate is connected to the metal ground plate, the front antenna body has a gap, and the front antenna body and the back coupling feeding line structure are respectively arranged on opposite surfaces of the dielectric plate; the metal ground plate has a first grounding point, and the first grounding point is connected to an outer conductor of a feeding cable; the front antenna body also has a first feeding point, and the first feeding point is connected to an inner conductor of the feeding cable; the back coupling feeding line structure has a second feeding point, and the second feeding point is connected to the inner conductor of the feeding cable. By setting the dual-polarized antenna as above, different polarized electromagnetic waves can be excited on the same antenna through different feeding methods, thereby realizing dual polarization. Compared with the dual-polarized antenna in the prior art which needs to use double antennas, the dual-polarized antenna of the application can be realized by the same antenna, so that the structure of the dual-polarized antenna is simpler, and it is convenient to assemble, and the production cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 One of the structure schematic diagram of the dual-polarized antenna provided for the embodiments of the utility model;
[0019] Figure 2 The second structure schematic diagram of the dual-polarized antenna provided for the embodiments of the utility model;
[0020] Figure 3 A return loss schematic diagram of a dual-polarized antenna in a first polarization state is provided for the embodiment of the present application.
[0021] Figure 4 A return loss schematic diagram of a dual-polarized antenna in a second polarization state is provided for the embodiment of the present application.
[0022] Figure 5 An isolation degree schematic diagram of a dual-polarized antenna in a first polarization state and a second polarization state is provided for the embodiment of the present application.
[0023] Figure 6 A radiation direction schematic diagram of a dual-polarized antenna in a first polarization state is provided for the embodiment of the present application.
[0024] Figure 7 A radiation direction schematic diagram of a dual-polarized antenna in a second polarization state is provided for the embodiment of the present application.
[0025] Icon: 10 - dielectric plate; 20 - front antenna body; 21 - slot; 22 - first grounding point; 23 - first feeding point; 30 - back coupling feeding line structure; 31 - second feeding point; 40 - metal ground plate. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.
[0028] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0029] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, or is the orientation or position relation commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" merely means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0031] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "setting", "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] Please refer to Figure 1 and Figure 2 The embodiment provides a dual-polarized antenna, which comprises a dielectric plate 10, a metal ground plate 40, a front antenna body 20 and a back coupling feed line structure 30; the dielectric plate 10 is connected to the metal ground plate 40, the front antenna body 20 has a gap 21, and the front antenna body 20 and the back coupling feed line structure 30 are arranged on opposite surfaces of the dielectric plate 10 respectively; the metal ground plate 40 has a first grounding point 22, and the first grounding point 22 is connected to an outer conductor of a feed cable; the front antenna body 20 further has a first feed point 23, and the first feed point 23 is connected to an inner conductor of the feed cable; the back coupling feed line structure 30 has a second feed point 31, and the second feed point 31 is connected to the inner conductor of the feed cable. The dual-polarized antenna is simple in structure, convenient to assemble and capable of reducing production manufacturing cost.
[0033] It should be noted that the dual-polarized antenna of the present application comprises a dielectric plate 10, a metal ground plate 40, a front antenna body 20 and a back coupling feeding line structure 30. The dielectric plate 10 is connected to the metal ground plate 40, and the front antenna body 20 and the back coupling feeding line structure 30 are respectively arranged on opposite sides of the dielectric plate 10. For example, the front antenna body 20 is arranged on the front side of the dielectric plate 10, and the back coupling feeding line structure 30 is arranged on the back side of the dielectric plate 10.
[0034] In the present embodiment, the dielectric plate 10 is provided with a corresponding line structure. It should be noted that in one possible implementation, the dielectric plate 10, the front antenna body 20 and the back coupling feeding line structure 30 can all be made of a PCB plate. In another possible implementation, the front antenna body 20 and the back coupling feeding line structure 30 can also be etched on the dielectric plate 10 respectively, so that the steps of attaching the front antenna body 20 and the back coupling feeding line structure 30 to the dielectric plate 10 as separate components can be omitted, and the structure and assembly process of the dual-polarized antenna can be simplified.
[0035] The metal ground plate 40 has a first grounding point 22, and the front antenna body 20 has a slot 21 and a first feeding point 23. It should be noted that the back coupling feeding line structure 30 excites the front antenna body 20, and a directional radiation vivaldi antenna (wideband microstrip antenna) can be formed through the slot 21 of the front antenna body 20, as shown in FIG. 2. Figure 7
[0036] The first grounding point 22 is used to connect the outer conductor of the feeding cable to achieve grounding, and the first feeding point 23 is used to connect the inner conductor of the feeding cable. In this way, the dual-polarized antenna of the present application can achieve feeding through the first feeding point 23.
[0037] The back coupling feeding line structure 30 has a second feeding point 31, which is used to connect the inner conductor of the feeding cable, so that the dual-polarized antenna of the present application can achieve feeding through the second feeding point 31.
[0038] It should be noted that in the present embodiment, the first polarization of the dual-polarized antenna of the present application utilizes the front antenna body 20 as a monopole antenna. The outer conductor of the feeding cable is connected to the first grounding point 22 of the metal ground plate 40, thereby achieving grounding of the outer conductor of the feeding cable, and the inner conductor of the feeding cable is connected to the first feeding point 23 of the front antenna body 20, and is fed through the first feeding point 23 to achieve the first polarization.
[0039] The second polarization utilizes the back coupling feed line structure 30 to excite the front antenna body 20, and a vivaldi antenna with directional radiation is formed through the slit 21 of the front antenna body 20. The outer conductor of the feed cable is connected to the first grounding point 22 of the metal ground plate 40, so as to realize the grounding of the outer conductor of the feed cable, and the inner conductor of the feed cable is connected to the second feed point 31 of the back coupling feed line structure 30, and is fed through the second feed point 31 to realize the second polarization.
[0040] Please refer to Figure 3 , Figure 3 for the return loss diagram of the dual-polarized antenna of the present application in the first polarization state, it can be seen from Figure 1 that the return loss value of the dual-polarized antenna of the present application in the first polarization state is less than -7dB in the range of 1GHz to 3.5GHz. Especially in the working bandwidth in the range of 1.5GHz to 2.75GHz, the return loss value is less than -9dB, such as Figure 3 the return loss of frequency point 1 (1.7GHz) is less than -9dB, and the return loss of frequency point 2 (2.7GHz) is less than -18dB. It can be seen that the return loss of the dual-polarized antenna of the present application in the first polarization state is small, the energy reflected back by the antenna itself is small, and the system efficiency of the antenna is better.
[0041] Similarly, please refer to Figure 4 , Figure 4 for the return loss diagram of the dual-polarized antenna of the present application in the second polarization state, it can be seen from Figure 4 that the return loss value of the dual-polarized antenna of the present application in the second polarization state is less than -8dB in the range of 1.5GHz to 3.5GHz. For example, Figure 4 the return loss of frequency point 1 (1.7GHz) is less than -14dB, and the return loss of frequency point 2 (2.7GHz) is less than -15dB. Especially in the working bandwidth in the range of 1.6GHz to 1.7GHz, and in the working bandwidth in the range of 2.2GHz to 2.3GHz, the return loss value is less than -30dB. It can be seen that the return loss of the dual-polarized antenna of the present application in the second polarization state is also small, the energy reflected back by the antenna itself is small, and the system efficiency of the antenna is better.
[0042] Also, please refer to Figure 5 , Figure 5 for the isolation diagram of the first polarization state and the second polarization state of the dual-polarized antenna of the present application, it can be seen from Figure 5 that the isolation of the first polarization state and the second polarization state of the dual-polarized antenna of the present application is less than -18dB in the range of 1.2GHz to 3.8GHz. For example, Figure 5The isolation of the frequency point 1 (1.7 GHz), the frequency point 2 (2.7 GHz) and the frequency point 3 (2.1 GHz) in the above table is less than -20 dB. It can be seen that the dual-polarized antenna has high isolation, and the coupling degree of the first polarization state and the second polarization state is low, and the first polarization state and the second polarization state can be effectively isolated.
[0043] Please refer to Figure 6 and Figure 7 , Figure 6 the first polarization state of the dual-polarized antenna of the present application is shown in the radiation direction diagram, Figure 7 the second polarization state of the dual-polarized antenna of the present application is shown in the radiation direction diagram. It can be seen that horizontal omnidirectional radiation can be achieved in the first polarization state, and directional radiation can be achieved in the second polarization state.
[0044] In summary, the dual-polarized antenna provided by the present application includes a dielectric plate 10, a metal ground plate 40, a front antenna body 20 and a back coupling feed line structure 30. The dielectric plate 10 is connected to the metal ground plate 40, the front antenna body 20 has a gap 21, and the front antenna body 20 and the back coupling feed line structure 30 are respectively arranged on opposite sides of the dielectric plate 10. The metal ground plate 40 has a first grounding point 22, and the first grounding point 22 is connected to the outer conductor of the feed cable. The front antenna body 20 further has a first feed point 23, and the first feed point 23 is connected to the inner conductor of the feed cable. The back coupling feed line structure 30 has a second feed point 31, and the second feed point 31 is connected to the inner conductor of the feed cable. By setting the above dual-polarized antenna, different polarized electromagnetic waves can be excited on the same antenna by different feed methods, thereby realizing dual polarization. Compared with the dual-polarized antenna in the prior art which needs to use double antennas, the dual-polarized antenna of the present application can be realized by the same antenna, so that the structure of the dual-polarized antenna is simpler, and it is convenient to assemble, and the production cost can be reduced.
[0045] In order to facilitate the passage of the outer conductor, optionally, in the present embodiment, the metal ground plate 40 has a through hole for the inner conductor of the feed cable to pass through. In this way, the inner conductor of the feed cable can pass through the hole and be connected to the first feed point 23 or the second feed point 31.
[0046] Optionally, in the present embodiment, the metal ground plate 40 is connected perpendicularly to the dielectric plate 10, as shown in Figure 1 and Figure 2 .
[0047] In addition, in the present embodiment, the above-mentioned front antenna body 20 serves as a monopole antenna.
[0048] Optionally, in the embodiment, the front antenna body 20 is a symmetrical structure. Figure 1
[0049] It should be noted that the two first grounding points 22 are symmetrically arranged relative to the first feeding point 23, which facilitates the preparation.
[0050] In addition, the projection of the slit 21 of the front antenna body 20 along the first direction is located between the two first grounding points 22, and the first direction is perpendicular to the thickness direction of the dielectric plate 10. Figure 1
[0051] Optionally, the slit 21 is located at the central axis of the front antenna body 20.
[0052] Optionally, the projection of the back coupling feeding line structure 30 on the front antenna body 20 passes through the slit 21. Figure 1 Figure 2
[0053] In another aspect, the utility model provides a kind of communication equipment, and the communication equipment includes the dual-polarized antenna described above.
[0054] It should be noted that the dual-polarized antenna can be mounted on the body of the communication equipment. In the communication equipment of the embodiment of the application, different polarized electromagnetic waves can be excited on the same antenna by different feeding methods, thereby realizing dual polarization. Compared with the dual-polarized antenna in the prior art which needs to use double antennas, the communication equipment using the dual-polarized antenna has the advantages of simple structure, easy assembly and reduced production cost.
[0055] The above is only optional embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.
[0056] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the utility model does not further describe various possible combination modes.
Claims
1. A dual polarized antenna, characterized by, The antenna comprises a dielectric plate, a metal ground plate, a front antenna body and a back coupling feed line structure; the dielectric plate is connected to the metal ground plate, the front antenna body has a slit, and the front antenna body and the back coupling feed line structure are respectively arranged on opposite sides of the dielectric plate; The metal ground plate has a first grounding point, and the first grounding point is connected to an outer conductor of a feed cable; The front antenna body further has a first feed point, and the first feed point is connected to an inner conductor of the feed cable; The back coupling feed line structure has a second feed point, and the second feed point is connected to the inner conductor of the feed cable.
2. The dual polarized antenna according to claim 1, characterized in that, The metal ground plate is vertically connected to the dielectric plate.
3. The dual polarized antenna according to claim 1, wherein, The metal ground plate has a through hole for the inner conductor of the feed cable to pass through.
4. The dual polarized antenna according to claim 1, wherein, The first grounding point has two, and the two first grounding points are distributed on opposite sides of the first feed point.
5. The dual polarized antenna according to claim 4, characterized in that, The projection of the slit along a first direction is located between the two first grounding points, and the first direction is perpendicular to the thickness direction of the dielectric plate.
6. The dual polarized antenna according to claim 1 or 5, characterized in that, The slit is located at the central axis of the front antenna body.
7. The dual polarized antenna according to claim 1 or 5, characterized in that, The front antenna body is a symmetrical structure.
8. The dual polarized antenna according to claim 1 or 5, characterized in that, The projection of the back coupling feed line structure on the front antenna body passes through the slit.
9. A communication device, characterized by The antenna further comprises the dual-polarized antenna according to any one of claims 1 to 8.