Dual-polarized dielectric dipole antenna
The dual-polarized dielectric dipole antenna addresses performance and manufacturing challenges by using integrally formed dielectric plates and optimized feeding balun circuits, resulting in a lightweight, stable, and easily producible antenna with improved bandwidth.
Patent Information
- Application Number
- PCT/CN2025/079381
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-26
- Filing Date
- 2025-02-26
- Publication Date
- 2025-09-04
AI Technical Summary
Existing antenna elements face challenges in achieving good performance, small size and weight, easy production, and stable manufacturing, particularly in low frequency bands, with issues such as high weight, complex production processes, and intermodulation distortion.
A dual-polarized dielectric dipole antenna design featuring a cross-shaped radiation unit with integrally formed dielectric plates and reduced perforations, utilizing feeding balun circuits with varying widths and a director for improved bandwidth, reducing the need for welding and simplifying production.
The design achieves reduced weight, stable performance, and simplified manufacturing with enhanced impedance bandwidth, while minimizing intermodulation distortion and assembly complexity.
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Figure CN2025079381_04092025_PF_FP_ABST
Abstract
Description
DUAL-POLARIZED DIELECTRIC DIPOLE ANTENNA
[0001] This application claims priority to Chinese Patent Application No. 202420350161.2, filed on February 26, 2014 and entitled “DUAL-POLARIZED DIELECTRIC DIPOLE ANTENNA” , the disclosure of which is incorporated herein by reference in its entirety.FIELD
[0002] Embodiments of the present disclosure generally relate to the technical field of communication antennas, and in particular, to a dual-polarized dielectric dipole antenna.BACKGROUND
[0003] With the development of 5G communication, a multiple-input multiple-output (MIMO) technology is widely applied to a base station product of a frequency band under 6GHz (Sub-6GHz) , in which an antenna unit (AU) is generally mounted on a radio unit (RU) through a connector or other methods (such as welding) .
[0004] Antenna elements may typically be dipoles of metal material mounted on time division duplex (TDD) radio devices, or patches mounted on dielectric material on the TDD radio devices. The antenna elements may also be a printed circuit board (PCB) dipole with a printed circuit and welding several parts together.
[0005] Existing antenna elements have certain limitations at low frequencies, especially in terms of multi-band combinations at low frequency bands. A conventional metal die-cast dipole antenna unit has good performance, but has high weight and cost for a radio integrated with a plurality of unit antenna arrays. A patch dielectric antenna has a good weight and cost, but has a limited bandwidth. A PCB dipole can balance the performance and weight of an antenna element, but has at least three components, and all components generally need to be welded and assembled together. Furthermore, the production process of the PCB dipole is complex, the production quality is difficult to be controlled, and the intermodulation (PIM) performance is not easy to be controlled.
[0006] Dielectric dipole antennas are gaining in popularity for reduced size and weight, and their dielectric material may be a plastic or ceramic with a low dielectric constant. A conventional broadband dielectric antenna having a Balun coupling structure usually needs at least two crossing through holes, which is difficult to implement by using an integrated structure. Even if it is realized using an integrated structure, the mold of the dielectric portion is relatively complicated, and the electroplating of the circuit is also complicated. A plating layer of the circuit is not firm, which may cause the performance of the circuit to be affected, for example, the loss and PIM are deteriorated. The complicated structure of the broadband dielectric antenna is difficult to ensure the flatness of the antenna, which may also affect the radiation performance of the antenna.
[0007] How to meet requirements of good and stable performance, small size and weight, easy production and manufacture and the like becomes a technical problem to be solved urgently by those skilled in the art.SUMMARY
[0008] It is an object of the present disclosure to provide a dual-polarized dielectric dipole antenna to at least partially solve the above-mentioned problems.
[0009] In a first aspect of the present disclosure, there is provided a dual-polarized dielectric dipole antenna, including a cross-shaped radiation unit and a director, wherein: the cross-shaped radiation unit includes a first dielectric plate and a second dielectric plate which are vertically cross-connected in a cross shape; the first dielectric plate includes a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate includes a first portion and a second portion separated by the first dielectric plate; one side of the first portion of the first dielectric plate is provided with a first radiation arm, the same side of the second portion of the first dielectric plate is provided with a first feeding balun circuit, and the other side of the second portion of the first dielectric plate is provided with a second radiation arm coupled to the first feeding balun circuit; one side of the first portion of the second dielectric plate is provided with a third radiation arm, the same side of the second portion of the second dielectric plate is provided with a second feeding balun circuit, and the other side of the second portion of the second dielectric plate is provided with a fourth radiation arm coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm is located intersects with a dielectric plane where the third radiation arm is located; the second feeding balun circuit of the second portion of the second dielectric plate is connected to the third radiation arm of the first portion of the second dielectric plate across a top side edge of the first dielectric plate; the first portion of the second dielectric plate is provided with a through-hole at a cross-connection position of the first dielectric plate and the second dielectric plate and being flat against the first dielectric plate, so that a plane of the first dielectric plate separated by the second dielectric plate penetrates through the through-hole, and thus the first feeding balun circuit is connected to the first radiation arm along the penetrating plane through the through-hole; the director is disposed on top of the cross-shaped radiation unit, a through hole is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit across the top side edge of the first dielectric plate.
[0010] In some embodiments, the antenna further includes a third dielectric plate, the third dielectric plate includes a power distribution circuit connected to the first and second feeding balun circuits; the cross-shaped radiation unit is disposed on the third dielectric plate.
[0011] In some embodiments, the first, second and third dielectric plates are integrally formed.
[0012] In some embodiments, the antenna further includes a ground, which is disposed on the third dielectric plate, for radiation arms, and the first to fourth radiation arms are all connected to the ground.
[0013] In some embodiments, the antenna further includes a metal reflector plate disposed under the third dielectric plate, and the ground is connected to the metal reflector plate.
[0014] In some embodiments, each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.
[0015] In some embodiments, the widths of the radiation arm portions and joints thereof are different and gradually changed.
[0016] In some embodiments, the first and second feeding balun circuits have different widths at different segments of a feeding line.
[0017] In a second aspect of the present disclosure, there is provided a dual-polarized dielectric dipole antenna, including a cross-shaped radiation unit and a director, wherein: the cross-shaped radiation unit includes a first dielectric plate and a second dielectric plate which are vertically cross-connected in a cross shape; the first dielectric plate includes a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate includes a first portion and a second portion separated by the first dielectric plate; one side of the first portion of the first dielectric plate is provided with a first radiation arm, the same side of the second portion of the first dielectric plate is provided with a first feeding balun circuit, and the other side of the second portion of the first dielectric plate is provided with a second radiation arm coupled to the first feeding balun circuit; one side of the first portion of the second dielectric plate is provided with a third radiation arm, the same side of the second portion of the second dielectric plate is provided with a second feeding balun circuit, and the other side of the second portion of the second dielectric plate is provided with a fourth radiation arm coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm is located intersects with a dielectric plane where the third radiation arm is located; the second feeding balun circuit of the second portion of the second dielectric plate is connected to the third radiation arm of the first portion of the second dielectric plate across a top side edge of the first dielectric plate; the first feeding balun circuit of the second portion of the first dielectric plate is connected to the first radiation arm of the first portion of the first dielectric plate across a top side edge of the second dielectric plate; the director is disposed on top of the cross-shaped radiation unit, a through hole is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit across the top of the first dielectric plate and the first feeding balun circuit across the top of the second dielectric plate.
[0018] In some embodiments, the antenna further includes a third dielectric plate, the third dielectric plate includes a power distribution circuit connected to the first and second feeding balun circuits; the cross-shaped radiation unit is disposed on the third dielectric plate.
[0019] In some embodiments, the first, second and third dielectric plates are integrally formed.
[0020] In some embodiments, the antenna further includes a ground, which is disposed on the third dielectric plate, for radiation arms, and the first to fourth radiation arms are all connected to the ground.
[0021] In some embodiments, the antenna further includes a metal reflector plate disposed under the third dielectric plate, and the ground is connected to the metal reflector plate.
[0022] In some embodiments, each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.
[0023] In some embodiments, the widths of the radiation arm portions and joints thereof are different and gradually changed.
[0024] In some embodiments, the first and second feeding balun circuits have different widths at different segments of a feeding line.
[0025] In a third aspect of the present disclosure, there is provided a dual-polarized dielectric dipole antenna, including a cross-shaped radiation unit and a director, wherein: the cross-shaped radiation unit includes a first dielectric plate and a second dielectric plate which are vertically cross-connected in a cross shape; the first dielectric plate includes a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate includes a first portion and a second portion separated by the first dielectric plate; one side of the first portion of the first dielectric plate is provided with a first radiation arm, the same side of the second portion is provided with a second radiation arm, and the other side of the second portion is provided with a ground corresponding to the second radiation arm; one side of the first portion is provided with a third radiation arm, the same side of the second portion of the second dielectric plate is provided with a second feeding balun circuit, and the other side of the second portion is provided with a fourth radiation arm coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm is located intersects with a dielectric plane where the third radiation arm is located; a radiation arm portion of the first radiation arm along a cross-connection position of the first dielectric plate and the second dielectric plate has a portion extending to the first portion of the second dielectric plate; a radiation arm portion of the second radiation arm along the cross-connection position of the first dielectric plate and the second dielectric plate has a portion extending to the first portion of the second dielectric plate; the portions of the first radiation arm and the second radiation arm that extend to the first portion of the second dielectric plate have a coupling relationship; the second feeding balun circuit of the second portion of the second dielectric plate is connected to the third radiation arm of the first portion of the second dielectric plate across a top side edge of the first dielectric plate; the director is disposed on top of the cross-shaped radiation unit.
[0026] In some embodiments, the antenna further includes a third dielectric plate, and the cross-shaped radiation unit is disposed on the third dielectric plate; the third dielectric plate includes a power distribution circuit connected to the second radiation arm and the second feeding balun circuit.
[0027] In some embodiments, the first, second and third dielectric plates are integrally formed.
[0028] In some embodiments, the antenna further includes a ground disposed on the third dielectric plate, the first, third and fourth radiation arms and the ground on the second portion of the first dielectric plate are all connected to the ground on the third dielectric plate, and the second radiation arm is coupled to the ground on the second portion of the first dielectric plate.
[0029] In some embodiments, the antenna further includes a metal reflector plate disposed under the third dielectric plate, and the ground on the third dielectric plate is connected to the metal reflector plate.
[0030] In some embodiments, each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.
[0031] In some embodiments, the widths of the radiation arm portions and joints thereof are different and gradually changed.
[0032] In some embodiments, the second feeding balun circuit has different widths at different segments of a feeding line.
[0033] The dipole dielectric dipole antenna of the present disclosure consists primarily of a dielectric board and circuits thereon. Coupling traces, the radiation arms, and the power distribution circuit are all on the dielectric board. The first, second and third dielectric plates are integrally formed. In this way, the dielectric portion can be produced at one time by a mold. Alternatively, the first dielectric plate and the second dielectric plate may be integrally formed to form a cross-shaped radiation unit, and then the cross-shaped radiation unit is installed on the third dielectric plate. The dielectric material may be a plastic material, and may also be a ceramic material or other dielectric materials. The mold of the antenna element is very simple and can reduce costs. In addition, the dielectric component manufactured in this way is easy to ensure flatness and stability performance.
[0034] The dual-polarized dielectric dipole antenna in the present disclosure only has a radiation circuit on the side of the dielectric plates of the cross-shaped radiation unit. The widths of the radiation arms of the antenna units are gradually changed, and the feeding balun circuits may also have different bandwidths, which will improve the impedance bandwidth of the antenna. The top director is mounted on the cross-shaped radiation unit, which further increases the bandwidth of the antenna.
[0035] In the dual-polarized dielectric dipole antenna of the present disclosure, the radiation arm is divided into four portions, two portions realize +45° polarization, and the other two portions realize -45° polarization. The dual-polarized design increases the antenna bandwidth.
[0036] The number of perforations on the cross-shaped radiation unit of the dual-polarized dielectric dipole antenna of the present disclosure is reduced, so that the production is easier and the circuit performance of the antenna is stable. The antenna as a whole using a dielectric material can significantly reduce the overall weight of the antenna, and the radiation unit as a whole can realize the assembling of various components of the antenna in a simple manner without welding or reducing the number of welding spots, thereby reducing the risk of intermodulation distortion PIM.
[0037] It should be appreciated that what is described in this Summary is not intended to limit key features or essential features of the embodiments of the disclosure, nor is it intended to limit the scope of the disclosure. Other features of the present disclosure will become readily appreciated from the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0038] The above and other features, advantages, and aspects of various embodiments of the present disclosure will become more apparent with reference to the following detailed description taken in conjunction with the accompanying drawings. In the drawings, the same or similar reference signs denote the same or similar elements, wherein:
[0039] Fig. 1 is a perspective schematic view of a dual-polarized dielectric dipole antenna according to an embodiment of the present disclosure;
[0040] Fig. 2 shows an exploded schematic view of the dual polarized dielectric dipole antenna shown in Fig. 1;
[0041] Fig. 3a shows a side view of the dual-polarized dielectric dipole antenna shown in Fig. 1 in one direction;
[0042] Fig. 3b is a schematic view of widths of a radiation arm and a feeding balun circuit of the dual-polarized dielectric dipole antenna shown in Fig. 1;
[0043] Fig. 4 shows a side view of the dual polarized dielectric dipole antenna shown in Fig. 1 in another direction;
[0044] Fig. 5 is a schematic view of a feed current of a dual-feeding balun circuit of the dual-polarized dielectric dipole antenna shown in Fig. 1;
[0045] Fig. 6 shows a top view of an antenna sub-array consisting of the dual-polarized dielectric dipole antenna shown in Fig. 1;
[0046] Fig. 7 is a perspective schematic view of the antenna sub-array shown in Fig. 6;
[0047] Fig. 8 is a perspective schematic view of an antenna array formed by the antenna sub-array shown in Fig. 6;
[0048] Fig. 9 is a schematic view of echo feedback of the dual-polarized dielectric dipole antenna shown in Fig. 1;
[0049] Fig. 10 is a diagram of an antenna structure according to another embodiment of the present disclosure;
[0050] Fig. 11 is a top view of the antenna shown in Fig. 10;
[0051] Fig. 12 is a side view of the antenna shown in Fig. 10 in one direction;
[0052] Fig. 13 is a side view of the antenna shown in Fig. 10 in another direction;
[0053] Fig. 14 is a structural diagram of an antenna according to another embodiment of the present disclosure;
[0054] Fig. 15 is a test diagram of the antenna shown in Fig. 14 in one direction;
[0055] Fig. 16 is a schematic view of a test diagram of the antenna shown in Fig. 14 in another direction;
[0056] Fig. 17 shows schematic views of different structural types of the director.DETAILED DESCRIPTION
[0057] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0058] The term "including" and variations thereof, as used herein, mean open-ended including, that is, "including but not limited to. " Unless specifically stated otherwise, the term "or" means "and / or. " The term "based on" means "based at least in part on. " The term "another embodiment" means "at least one further embodiment. " The terms "first, " "second, " and the like may refer to different or identical objects.
[0059] As described above, the die-cast dipole antenna is too heavy in weight and cannot be applied to a 5G advanced antenna system (5G AAS) . The PCB dipole antenna has too many welding spots, which leads to a high risk of PIM, and also requires a complex welding process, thereby increasing production costs. Embodiments of the present disclosure provide a dual-polarized dielectric dipole antenna, capable of reducing the number of perforations on a dielectric, making the production of an antenna element easier and stabilizing the circuit performance of the antenna. The antenna as a whole using a dielectric material can significantly reduce the overall weight of the antenna, and the radiation unit as a whole can realize the assembling of various components of the antenna in a simple manner, thereby reducing the number of welding spots and reducing the risk of intermodulation distortion PIM. Example embodiments of the present disclosure will be described with reference to Figs. 1 to 17 hereafter.
[0060] Fig. 1 shows a perspective schematic view of a dual polarized dielectric dipole antenna according to an embodiment of the present disclosure, and Fig. 2 shows an exploded schematic view of the dual polarized dielectric dipole antenna shown in Fig. 1. Fig. 3a shows a side view of the dual-polarized dielectric dipole antenna shown in Fig. 1 in the direction of a second dielectric plate. Fig. 3b is a schematic view of widths of a radiation arm and a feeding balun circuit of the dual-polarized dielectric dipole antenna shown in Fig. 1. Fig. 4 shows a side view of the dual polarized dielectric dipole antenna shown in Fig. 1 in the direction of a first dielectric plate.
[0061] As shown in Figs. 1 to 4, the dual polarized dielectric dipole antenna 1 described herein generally includes a cross-shaped radiation unit 101 and a director 102.
[0062] The cross-shaped radiation unit 101 includes a first dielectric plate 101-1 and a second dielectric plate 101-2 which are vertically cross-connected in a cross shape. The first dielectric plate 101-1 includes a first portion and a second portion separated by the second dielectric plate 101-2, and the second dielectric plate 101-2 includes a first portion and a second portion separated by the first dielectric plate 101-1.
[0063] One side of the first portion of the first dielectric plate 101-1 is provided with a first radiation arm 1011, the same side of the second portion is provided with a first feeding balun circuit 1011_a, and the other side of the second portion is provided with a second radiation arm 1012 coupled to the first feeding balun circuit, as shown by a dotted line in Fig. 3a. One side of the first portion of the second dielectric plate 101-2 is provided with a third radiation arm 1013, the same side of the second portion is provided with a second feeding balun circuit 1013_a, and the other side of the second portion is provided with a fourth radiation arm 1014 coupled to the second feeding balun circuit, as shown by a dotted line in Fig. 4. A dielectric plane where the first radiation arm 1011 is located intersects with a dielectric plane where the third radiation arm 1013 is located.
[0064] The second feeding balun circuit 1013_aof the second portion of the second dielectric plate 101-2 is connected to the third radiation arm 1013 of the first portion of the second dielectric plate 101-2 across the top of the first dielectric plate 101-1.
[0065] The first portion of the second dielectric plate 101-2 is provided with a through-hole 101_aat a cross-connection position of the first dielectric plate and the second dielectric plate and being flat against the first dielectric plate 101-1, so that a plane of the first dielectric plate separated by the second dielectric plate penetrates through the through-hole, and thus the first feeding balun circuit 1011_ais connected to the first radiation arm 1011 along the penetrating plane through the through-hole.
[0066] The director 102 is disposed on top of the cross-shaped radiation unit 101, a through hole 102-1 is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit 1013_aacross the top of the first dielectric plate 101-1.
[0067] In the embodiments shown in Figs. 1 to 4, the director 102 is disposed on top of the cross-shaped radiation unit 101 only for the purpose of illustrating the relative position. It will be appreciated that when the cross-shaped radiation unit 101 is in other orientations, the director 102 changes its own orientation accordingly, but its placement position relative to the cross-shaped radiation unit will not change.
[0068] In the embodiments shown in Figs. 1 to 4, the first radiation arm 1011 and the second radiation arm 1012 are a group of radiation arms for realizing +45° polarization, and the two radiation arms are disposed on different sides of the first dielectric plate. As shown in Fig. 3a, the first radiation arm 1011 is identified by a solid line, and the second radiation arm 1012 is identified by a dotted line and is located on the other side of the first dielectric plate. The third radiation arm 1013 and the fourth radiation arm 1014 are another group of radiation arms for realizing -45° polarization, and the two radiation arms are disposed on different sides of the first dielectric plate. As shown in Fig. 4, the third radiation arm 1013 is identified by a solid line, and the fourth radiation arm 1014 is identified by a dotted line and is located on the other side of the second dielectric plate. It should be understood that the first radiation arm 1011 and the second radiation arm 1012 may also be a group of radiation arms that realize -45° polarization, and the other group of the third radiation arm 1013 and the fourth radiation arm 1014 may realize +45° polarization.
[0069] In the embodiments shown in Figs. 1 to 4, the first dielectric plate 101-1 and the second dielectric plate 101-2 are vertically cross-connected in a cross shape to form a whole, that is, the cross-shaped radiation unit 101. The cross-shaped radiation unit 101 may be integrally formed by using a mold or formed by hot-melt bonding. There is no slot at a cross-connection position of the first dielectric plate 101-1 and the second dielectric plate 101-2 of the cross-shaped radiation unit. The formed cross-shaped radiation unit has a stable overall structure, is easy to be manufactured, and facilitates manufacture of circuits thereon, for example, processing such as printing and drawing of the circuits, electroplating and spraying.
[0070] In some embodiments, the dual polarized dielectric dipole antenna 1 may further include a third dielectric plate 101-3. The third dielectric plate 101-3 supports the cross-shaped radiation unit 101. The cross-shaped radiation unit 101 may be integrally formed with the third dielectric plate 101-3, and may also be disposed on the third dielectric plate 101-3 in installing and fixing manners. The third dielectric plate 101-3 includes a power distribution circuit connected to the first and second feeding balun circuits and is configured to supply power to the feeding balun circuits.
[0071] In some embodiments, the third dielectric plate 101-3 is further provided with a ground 1015 of the radiation arms, and the first to fourth radiation arms are all connected to the ground. The shape of the ground 1015 of the radiation arms in the embodiment shown in Figs. 1 and 2 is substantially square, which is just an example. It should be understood that, the shape of the ground 1015 may also be other shapes, for example, a circle, a polygon, and so on, which is not limited in the embodiment of the present disclosure.
[0072] In some embodiments, two side edges of the third dielectric plate 101-3 may have a skirt with a certain height protruding vertically upward and downward, and may serve as a separation wall between sub-arrays in the antenna array.
[0073] In some embodiments, the dual-polarized dielectric dipole antenna 1 may include a metal reflector plate disposed under the third dielectric plate, the metal reflector plate may serve as a ground of the antenna, and the ground 1015 of the radiation arms is connected to the metal reflector plate. The metal reflection board may be an independent component and installed together with the third dielectric board, and may also be a metal plating layer on the bottom surface of the third dielectric board. The embodiments of the present disclosure are not limited thereto.
[0074] In some implementations, each of the top side edges of the first and second portions of the first dielectric plate 101-1 and the first and second portions of the second dielectric plate 101-2 have a protruding portion 1016. Four holes corresponding to the protruding portions 1016 are formed in the director 102, and the protruding portions pass through the four holes. The director may be positioned on the cross-shaped radiation unit, and then is fixed on the top of the cross-shaped radiation unit 101 by means of dielectric hot melting. The protruding portions may also be a snap structure, and the protruding portion passes through the holes of the director and then are clamped to the top of the cross-shaped radiation unit. It should be understood that the director may also be fixed and installed on top of the cross-shaped vertical radiation unit in other conventional manners, such as gluing. In addition, the director may not be provided with the above four holes, but may be joined to the protruding portions 1016 at the edges.
[0075] Fig. 3a shows a side view of the antenna in the direction of the second dielectric plate 101-2. As shown in Fig. 3a, the first feeding balun circuit 1011_ais connected to the first radiation arm 1011 through a through-hole 101_aof the first portion of the second dielectric plate 101-2. A conventional dual-polarized antenna always needs at least two holes for plating a balun circuit, and a relatively small hole is required due to a limited space at a cross-connection position, which is not conducive to fabrication of a via circuit on a dielectric board, for example, processing such as wiring engraving and plating. In this embodiment, only one hole is required at the cross-connection position, and the hole may be provided to be larger, so that it is easier to manufacture the first feeding balun circuit 1011_aon the dielectric board such as the first dielectric board 101-1, for example, processing such as wiring engraving and electroplating. Furthermore, the number of holes is reduced, which facilitates the simplification of production and the guarantee of performance.
[0076] Fig. 3b is a schematic view of widths of a radiation arm and a feeding balun circuit of the dual-polarized dielectric dipole antenna 1. As shown in Fig. 3b, the radiation arm has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge. In the embodiments of the present disclosure, the first radiation arm 1011, the second radiation arm 1012, the third radiation arm 1013 and the fourth radiation arm 1014 all have similar structures described above, but are different in specific sizes. As shown in Fig. 3b, the radiation arm portion along the cross-connection position have different widths wa1, wa2, the radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located have different widths wa3, wa4, the radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located have different widths wa5, wa6, and the radiation arm portion extending in a direction away from the adjacent side edge have a width wa7. The above-mentioned widths wa1-wa7 are different, and the change of the width of these radiation arms is gradual. The dynamic change of the width of the radiation arms can improve the impedance bandwidth of the antenna, and can also reduce the edge length of the antenna unit.
[0077] It can be understood that the seven values of wa1-wa7 shown in the figures are only a limited representation of the width of each radiation arm portion, and the width of each radiation arm is gradually changed and has different width changes. The widths of the joints of the radiation arm portions may also be different and gradually changed, and the joints of the radiation arm portions may be smooth joints having a certain radian. It can be understood that, the connection of each radiation arm portion may be in any other manner, and may be adjusted according to actual antenna radiation requirements.
[0078] Fig. 3b also shows the structure of the feeding balun circuit and its width at different segments of the feed line. In the embodiments of the present disclosure, both the first feeding balun circuit and the second feeding balun circuit have the foregoing similar structures, but differ in specific sizes. The feeding balun circuit has different widths wb1-wb5 at different segments of the feeding line. Although five width values are indicated in the figure, it can be understood that the number of segments of the feeding balun circuit is not limited to five, and may be any width at any segment, which may be adjusted according to actual antenna feeding requirements. Such a feeding balun circuit may further optimize impedance bandwidth within a limited space. Based on this structure, the antenna element may realize a small size. In addition, the feeding balun circuit in the figures has a serpentine structure, and it may be understood that the serpentine structure may not be required.
[0079] Fig. 4 shows a side view seen in the direction of the first dielectric plate. In this figure, the second feeding balun circuit 1013_aon the second portion of the second dielectric plate 101-2 is connected to the third radiation arm 1013 of the first portion of the second dielectric plate 101-2 across the top of the first dielectric plate 101-1 and above the through-hole 101_a of the first portion of the second dielectric plate.
[0080] Part (a) of Fig. 5 shows a situation that a feed current of the first feeding balun circuit is fed to the first radiation arm and the third radiation arm respectively through connection and coupling. The feed current i1 of the first feeding balun circuit 1011_adirectly flows into the first radiation arm 1011 from a feeding port through the through hole 101_aand becomes i1’ and is coupled to the second radiation arm 1012 at the same time and becomes i1”. Part (b) of Fig. 5 shows a situation that a feed current of the second feeding balun circuit is directly fed and coupled to the third and fourth radiation arms. The feed current i2 of the second feeding balun circuit 1013_aflows from the feeding port, across the top of the first dielectric plate 101-1, directly into the third radiation arm 1013 to become i2’ , and is coupled to the fourth radiation arm 1014 to become i2" . The currents i1’ and i1" have the same magnitude and opposite phases, and i2’ and i2" have the same magnitude and opposite phases, thereby forming two pairs of dipole antenna units.
[0081] Fig. 6 shows a top view of an antenna sub-array consisting of the dual-polarized dielectric dipole antenna shown in Fig. 1. Fig. 7 is a perspective schematic view of the antenna sub-array shown in Fig. 6. As shown in Figs. 6 and 7, six dual-polarized dielectric dipole antennas are regularly arranged on the same third dielectric plate 201 to form an antenna sub-array 2.2011_1~2011_6 is one radiation arm of six antennas. 2013_1~2013_6 is another radiation arm of six antennas. Radiation arms 2011_1~ 2011_6 and radiation arms 2013_1~ 2013_6 are comparable to radiation arms 2011 and 2013 in Fig. 1. The cross-shaped radiation units of six dual-polarized dielectric dipole antennas can be integrally formed with a third dielectric plate 201. In this way, the whole antenna array can be manufactured more simply, for example, the whole antenna array can be formed at one time by using one mold. Furthermore, the manufactured antenna structure is stable, and the manufacture of circuits thereon, for example, processing such as scribing and electroplating, is also more convenient. Furthermore, installation of the director is also very convenient. The cross-shaped radiation units of six dual-polarized dielectric dipole antennas may also be installed and fixed on the third dielectric plate 201 in various conventional manners. Based on the above design structure, a large-sized unit array can achieve better flatness and stable performance. Other numbers of antenna radiation elements may also be provided in the antenna sub-array according to design requirements.
[0082] Fig. 8 shows an antenna array constituted by the antenna sub-array shown in Fig. 6. The antenna array 3’ has eight sub-arrays 301’ ~308’ . The eight sub-arrays may be assembled together by an assembling jig or may be assembled together by other means, such as welding.
[0083] Fig. 9 shows an echo feedback of the dual-polarized dielectric dipole antenna shown in Fig. 1. As shown in the figure, a solid line indicates a return loss S11 of one group of radiation arms of the antenna element according to the embodiment of the present disclosure, and a dotted line indicates a return loss S22 of another group of radiation arms of the antenna element according to the embodiment of the present disclosure. The antenna element according to the embodiment of the present disclosure is a broadband radiation element and can cover several communication bands.
[0084] Figs. 10-13 show an antenna structure according to another embodiment of the present disclosure. As shown in Figs. 10-13, the structure of a dual-polarized dielectric dipole antenna 3 is basically the same as the antenna structure shown in Figs. 1-4, and generally includes a cross-shaped radiation unit 301 and a director 302.
[0085] The cross-shaped radiation unit 301 includes a first dielectric plate 301-1 and a second dielectric plate 301-2 which are cross-connected in a cross shape. The first dielectric plate 301-1 includes a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate 301-2 includes a first portion and a second portion separated by the first dielectric plate.
[0086] One side of the first portion of the first dielectric plate 301-1 is provided with a first radiation arm 3011, the same side of the second portion is provided with a first feeding balun circuit 3011_a, and the other side of the second portion is provided with a second radiation arm 3012 coupled to the first feeding balun circuit; one side of the first portion of the second dielectric plate 301-2 is provided with a third radiation arm 3013, the same side of the second portion is provided with a second feeding balun circuit 3013-a, and the other side of the second portion is provided with a fourth radiation arm 3014 coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm 3011 is located intersects with a dielectric plane where the third radiation arm 3013 is located.
[0087] The second feeding balun circuit 3013_a of the second portion of the second dielectric plate 301-2 is connected to the third radiation arm 3013 of the first portion of the second dielectric plate across a top side edge of the first dielectric plate 301-1.
[0088] The first feeding balun circuit 3011_a of the second portion of the first dielectric plate 301-1 is connected to the first radiation arm 3011 of the first portion of the first dielectric plate across a top side edge of the second dielectric plate 301-2.
[0089] The director 302 is disposed on top of the cross-shaped radiation unit, a through hole 302-1 is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit 3013_a across the top side edge of the first dielectric plate 301-1 and the first feeding balun circuit 3011_a across the top side edge of the second dielectric plate 301-2.
[0090] The embodiments shown in Figs. 10-13 differ from the embodiments shown in Figs. 1-4 only in that no through-hole is provided on the second dielectric plate, and the second feeding balun circuit is also, like the first feeding balun circuit, connected to the radiation arm of another portion of the dielectric plate where the second feeding balun circuit is located across another dielectric plate. In addition, in the embodiments shown in Figs. 10-13, protruding portions 3016 on top of the first and second dielectric plates, the holes on the director corresponding to the protruding portions, the ground 3015 of each radiation arm, the metal reflector plate, and other related structures are all the same as those in the embodiments shown in Figs. 1-4, and are not described in detail herein again.
[0091] In the embodiments shown in figures 10-13, no through-hole is provided in the cross-shaped radiation unit. Although a cross-connection point is generated by two cross-connection feeding balun circuits due to a cross-connection route crossing, which has a certain impact on high-frequency performance, the overall manufacture of an antenna is simpler, and the manufacture of circuits on the dielectric plates is more convenient.
[0092] Figs. 14-16 show an antenna structure of another embodiment of the present disclosure. As shown in Figs. 14-16, the structure of a dual-polarized dielectric dipole antenna 4 generally includes a cross-shaped radiation unit 301 and a director 302.
[0093] The cross-shaped radiation unit 401 includes a first dielectric plate 401-1 and a second dielectric plate 401-2 which are vertically cross-connected in a cross shape; the first dielectric plate includes a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate includes a first portion and a second portion separated by the first dielectric plate.
[0094] One side of the first portion of the first dielectric plate 401-1 is provided with a first radiation arm 4011, the same side of the second portion is provided with a second radiation arm 4012, and the other side of the second portion is provided with a ground 4017 coupled to the second radiation arm; one side of the first portion of the second dielectric plate 401-2 is provided with a third radiation arm 4013, the same side of the second portion of the second dielectric plate is provided with a second feeding balun circuit 4013_a, and the other side of the second portion is provided with a fourth radiation arm 4014 coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm 4011 is located intersects with a dielectric plane where the third radiation arm 4013 is located.
[0095] A radiation arm portion of the first radiation arm 4011 along a cross-connection position of the first dielectric plate and the second dielectric plate has a portion 4011_a extending to the first portion of the second dielectric plate 401-2; a radiation arm portion of the second radiation arm 4012 along the cross-connection position of the first dielectric plate and the second dielectric plate has a portion extending to the first portion of the second dielectric plate 401-2; the portions of the first radiation arm 4011 and the second radiation arm 4012 that extend to the first portion of the second dielectric plate 401-2 have a coupling relationship.
[0096] The second feeding balun circuit 4013_a of the second portion of the second dielectric plate 401-2 is connected to the third radiation arm 4013 of the first portion of the second dielectric plate across a top side edge of the first dielectric plate 401-1.
[0097] The director 402 is disposed on top of the cross-shaped radiation unit.
[0098] In an embodiment, the dual-polarized dielectric dipole antenna 4 further includes a third dielectric plate 401-3, and the cross-shaped radiation unit is disposed on the third dielectric plate; the third dielectric plate includes a power distribution circuit connected to the second radiation arm 4012 and the second feeding balun circuit. The power distribution circuit directly feeds power to the second radiation arm 4012, and the first radiation arm obtains power feeding from the first radiation arm by means of slot coupling.
[0099] In an embodiment, the dual-polarized dielectric dipole antenna 4 further includes a ground 4015 disposed on the third dielectric plate 401-3, the first, third and fourth radiation arms and the ground 4017 on the second portion of the first dielectric plate 401-1 are all connected to the ground 4015 on the third dielectric plate, and the second radiation arm 4012 is coupled to the ground 4017 on the second portion of the first dielectric plate 401-1. The width and height of ground 4017 can be adjusted to optimize the bandwidth.
[0100] In an embodiment, the cross-shaped radiation unit 401 and the third dielectric plate 401-3 are formed integrally.
[0101] In the embodiments shown in Fig. 14 to Fig. 16, connection structures of the second feeding balun circuit and the radiation arms on the second dielectric plate are the same as those in the foregoing embodiments, both being that the second feeding balun circuit is connected to the third radiation arm across the first dielectric plate. In the embodiments shown in Figs. 14-16, no through-hole is provided on the second dielectric plate, and at the same time, no feeding balun circuit is provided on the first dielectric plate, and a first radiation arm and a second radiation arm which are coupled to each other are provided. By directly feeding the second radiation arm, the first radiation arm can also obtain feeding by means of coupling.
[0102] Except for the above structures, in the embodiments shown in Figs. 14-16, the protruding portions 4016 on top of the first and second dielectric plates, the holes on the director corresponding to the protruding portions, the metal reflector plate and the like are the same as the corresponding parts in the previous embodiments, and reference can be made to the previous description for the specific structure and function thereof, which will not be repeated here.
[0103] In the embodiments shown in Figs. 14-16, no through-hole needs to be provided on the second dielectric plate, and a cross-shaped radiation unit formed by the first dielectric plate and the second dielectric plate is more conducive to be manufactured integrally. For example, by molding at one time by using one mold, manufacturing circuits on the dielectric plates, for example, processing such as electroplating, is easier. The good plating quality formed in this way enables the overall radio frequency performance of the antenna to be better, and the performance such as loss and PIM can be optimized.
[0104] The antennas described in the foregoing embodiments may form an antenna array in an antenna array manner shown in Figs. 6-8. It will be appreciated that the antenna array size is not limited to the sub-array or array size shown in Figs. 6-8.
[0105] Fig. 17 shows directors 502, 602, 702 and 802 of different structures. The director 502 is of a square structure, and has four holes 5022 fixedly mounted to a cross-shaped radiation unit. A through hole 5024 is formed in the center of the director 502. An annular groove 5023 may also be formed at the periphery of the through hole to adjust radiation performance. A notch 5021 may also be formed at a middle position of four sides of the director. The director 602 has a square structure with arc-shaped corners. The central through hole 7023 of the director 702 is a square. The director 802 is a director of a circular structure. Each of the directors of the foregoing structures may be applied to the foregoing embodiments according to actual radiation requirements. The director structure of each embodiment of the present disclosure is not limited to the above structure, and both the outline and the central through-hole thereof can adopt other shapes. The director is a metal sheet, and may be formed by means of stamping or the like.
[0106] In some embodiments, the first dielectric plate, the second dielectric plate, and the third dielectric plate may be plastic portions formed by injection molding, and the first dielectric plate, the second dielectric plate, and the third dielectric plate are integrally formed by using a mold. In this way, the cross-shaped radiation unit and the third dielectric plate are easy to be manufactured, the overall structure is stable and reliable, and the circuits on the cross-shaped radiation unit and the third dielectric plate are easy to be manufactured. It should be understood that the cross-shaped radiation unit and the third dielectric plate may also be manufactured by other manufacturing processes or by using other insulating materials, which is not limited in the embodiments of the present disclosure.
[0107] Having described embodiments of the disclosure above, the foregoing description is exemplary, not exhaustive, and is not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application or technological improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1.A dual-polarized dielectric dipole antenna, comprising a cross-shaped radiation unit (101) and a director (102) , wherein:the cross-shaped radiation unit (101) comprises a first dielectric plate (101-1) and a second dielectric plate (101-2) which are vertically cross-connected in a cross shape;the first dielectric plate (101-1) comprises a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate (101-2) comprises a first portion and a second portion separated by the first dielectric plate;one side of the first portion of the first dielectric plate (101-1) is provided with a first radiation arm (1011) , the same side of the second portion is provided with a first feeding balun circuit (1011_a) , and the other side of the second portion is provided with a second radiation arm (1012) coupled to the first feeding balun circuit; one side of the first portion of the second dielectric plate (101-2) is provided with a third radiation arm (1013) , the same side of the second portion is provided with a second feeding balun circuit (1013_a) , and the other side of the second portion is provided with a fourth radiation arm (1014) coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm (1011) is located intersects with a dielectric plane where the third radiation arm (1013) is located;the second feeding balun circuit (1013_a) of the second portion of the second dielectric plate (101-2) is connected to the third radiation arm (1013) of the first portion of the second dielectric plate (101-2) across a top side edge of the first dielectric plate (101-1) ;the first portion of the second dielectric plate (101-2) is provided with a through-hole (101_a) at a cross-connection position of the first dielectric plate and the second dielectric plate and being flat against the first dielectric plate (101-1) , so that a plane of the first dielectric plate separated by the second dielectric plate penetrates through the through-hole, and thus the first feeding balun circuit (1011_a) is connected to the first radiation arm (1011) along the penetrating plane through the through-hole;the director (102) is disposed on top of the cross-shaped radiation unit (101) , a through hole (102-1) is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit (1013_a) across the top side edge of the first dielectric plate (101-1) .2.The dual-polarized dielectric dipole antenna according to claim 1, wherein the antenna further comprises a third dielectric plate (101-3) , the third dielectric plate comprises a power distribution circuit connected to the first and second feeding balun circuits; the cross-shaped radiation unit is disposed on the third dielectric plate.3.The dual-polarized dielectric dipole antenna according to claim 2, wherein the first, second and third dielectric plates are integrally formed.4.The dual-polarized dielectric dipole antenna according to claim 2, wherein the antenna further comprises a ground (1015) , which is disposed on the third dielectric plate, for radiation arms, and the first to fourth radiation arms are all connected to the ground.5.The dual-polarized dielectric dipole antenna according to claim 4, wherein the antenna further comprises a metal reflector plate disposed under the third dielectric plate, and the ground (1015) is connected to the metal reflector plate.6.The dual-polarized dielectric dipole antenna according to any of claims 1 to 5, wherein each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.7.The dual-polarized dielectric dipole antenna according to claim 6, wherein the widths of the radiation arm portions and joints thereof are different and gradually changed.8.The dual-polarized dielectric dipole antenna according to any of claims 1-5 and 7, wherein the first and second feeding balun circuits have different widths at different segments of a feeding line.9.A dual-polarized dielectric dipole antenna, comprising a cross-shaped radiation unit (301) and a director (302) , wherein:the cross-shaped radiation unit (301) comprises a first dielectric plate (301-1) and a second dielectric plate (301-2) which are vertically cross-connected in a cross shape;the first dielectric plate (301-1) comprises a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate (301-2) comprises a first portion and a second portion separated by the first dielectric plate;one side of the first portion of the first dielectric plate (301-1) is provided with a first radiation arm (3011) , the same side of the second portion is provided with a first feeding balun circuit (3011_a) , and the other side of the second portion is provided with a second radiation arm (3012) coupled to the first feeding balun circuit; one side of the first portion of the second dielectric plate (301-2) is provided with a third radiation arm (3013) , the same side of the second portion is provided with a second feeding balun circuit (3013-a) , and the other side of the second portion is provided with a fourth radiation arm (3014) coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm (3011) is located intersects with a dielectric plane where the third radiation arm (3013) is located;the second feeding balun circuit (3013_a) of the second portion of the second dielectric plate (301-2) is connected to the third radiation arm (3013) of the first portion of the second dielectric plate across a top side edge of the first dielectric plate (301-1) ;the first feeding balun circuit (3011_a) of the second portion of the first dielectric plate (301-1) is connected to the first radiation arm (3011) of the first portion of the first dielectric plate across a top side edge of the second dielectric plate (301-2) ;the director (302) is disposed on top of the cross-shaped radiation unit, a through hole (302-1) is disposed at a central position of the director, so that the director is not in contact with the second feeding balun circuit (3013_a) across the top side edge of the first dielectric plate (301-1) and the first feeding balun circuit (3011_a) across the top side edge of the second dielectric plate (301-2) .10.The dual-polarized dielectric dipole antenna according to claim 9, wherein the antenna further comprises a third dielectric plate (301-3) , the third dielectric plate comprises a power distribution circuit connected to the first and second feeding balun circuits; the cross-shaped radiation unit is disposed on the third dielectric plate.11.The dual-polarized dielectric dipole antenna according to claim 10, wherein the first, second and third dielectric plates are integrally formed.12.The dual-polarized dielectric dipole antenna according to claim 11, wherein the antenna further comprises a ground (3015) , which is disposed on the third dielectric plate, for radiation arms, and the first to fourth radiation arms are all connected to the ground.13.The dual-polarized dielectric dipole antenna according to claim 12, wherein the antenna further comprises a metal reflector plate disposed under the third dielectric plate, and the ground (3015) for the radiation arms on the third dielectric plate is connected to the metal reflector plate.14.The dual-polarized dielectric dipole antenna according to any of claims 9 to 13, wherein each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.15.The dual-polarized dielectric dipole antenna according to claim 14, wherein the width of the radiation arm portions and joints thereof is different and gradually changed.16.The dual-polarized dielectric dipole antenna according to any of claims 8-13 and 15, wherein the first and second feeding balun circuits have different widths at different segments of a feeding line.17.A dual-polarized dielectric dipole antenna, comprising a cross-shaped radiation unit (401) and a director (402) , wherein:the cross-shaped radiation unit (401) comprises a first dielectric plate (401-1) and a second dielectric plate (401-2) which are vertically cross-connected in a cross shape; the first dielectric plate comprises a first portion and a second portion separated by the second dielectric plate, and the second dielectric plate comprises a first portion and a second portion separated by the first dielectric plate;one side of the first portion of the first dielectric plate (401-1) is provided with a first radiation arm (4011) , the same side of the second portion is provided with a second radiation arm (4012) , and the other side of the second portion is provided with a ground (4017) coupled to the second radiation arm; one side of the first portion of the second dielectric plate (401-2) is provided with a third radiation arm (4013) , the same side of the second portion of the second dielectric plate is provided with a second feeding balun circuit (4013_a) , and the other side of the second portion is provided with a fourth radiation arm (4014) coupled to the second feeding balun circuit; wherein a dielectric plane where the first radiation arm (4011) is located intersects with a dielectric plane where the third radiation arm (4013) is located;a radiation arm portion of the first radiation arm (4011) along a cross-connection position of the first dielectric plate and the second dielectric plate has a portion (4011_a) extending to the first portion of the second dielectric plate (401-2) ; a radiation arm portion of the second radiation arm (4012) along the cross-connection position of the first dielectric plate and the second dielectric plate has a portion extending to the first portion of the second dielectric plate (401-2) ; the portions of the first radiation arm (4011) and the second radiation arm (4012) that extend to the first portion of the second dielectric plate (401-2) have a coupling relationship;the second feeding balun circuit (4013_a) of the second portion of the second dielectric plate (401-2) is connected to the third radiation arm (4013) of the first portion of the second dielectric plate across a top side edge of the first dielectric plate (401-1) ;the director (402) is disposed on top of the cross-shaped radiation unit.18.The dual-polarized dielectric dipole antenna according to claim 17, wherein the antenna further comprises a third dielectric plate (401-3) , and the cross-shaped radiation unit is disposed on the third dielectric plate; the third dielectric plate comprises a power distribution circuit connected to the second radiation arm (4012) and the second feeding balun circuit (4013_a) .19.The dual-polarized dielectric dipole antenna of claim 18, wherein the first, second and third dielectric plates are integrally formed.20.The dual-polarized dielectric dipole antenna according to claim 18, wherein the antenna further comprises a ground (4015) disposed on the third dielectric plate (401-3) , the first, third and fourth radiation arms and the ground (4017) on the second portion of the first dielectric plate (401-1) are all connected to the ground (4015) on the third dielectric plate, and the second radiation arm (4012) is coupled to the ground (4017) on the second portion of the first dielectric plate (401-1) .21.The dual-polarized dielectric dipole antenna according to claim 20, wherein the antenna further comprises a metal reflector plate disposed under the third dielectric plate, and the ground (4015) on the third dielectric plate is connected to the metal reflector plate.22.The dual-polarized dielectric dipole antenna according to any of claims 17-21, wherein each of the first, second, third and fourth radiation arms has, in sequence, a radiation arm portion along the cross-connection position, a radiation arm portion along a top side edge of a dielectric plate where the radiation arm portion is located, a radiation arm portion along an adjacent side edge of the top side edge of the dielectric plate where the radiation arm portion is located, and a radiation arm portion extending in a direction away from the adjacent side edge.23.The dual-polarized dielectric dipole antenna according to claim 22, wherein the width of the radiation arm portions and joints thereof is different and gradually changed.24.The dual-polarized dielectric dipole antenna according to any of claims 17 to 21 and 23, wherein the second feeding balun circuit has different widths at different segments of a feeding line.
Citation Information
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