Ultra-wideband dual-polarized antenna

Abstract

The utility model, which relates to the technical field of the mobile communication base station antenna, discloses an ultra-wideband dual-polarized antenna comprising a dielectric plate; the radiation part is arranged on the dielectric plate, and the radiation part is used for radiating signals; one end of the coaxial line is connected with the radiation part, the other end of the coaxial line is used for being connected with external equipment, and the coaxial line is used for transmitting signals of the external equipment to the radiation part and feeding. According to the utility model, the radiation part is arranged on the dielectric plate, the coaxial line is connected to the center of the radiation part, and signal transmission and feed to the radiation part are directly carried out through the coaxial line, so that the effects of ultra wide band and low cost are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to an ultra-wideband dual-polarization antenna. Background Art

[0002] With the continuous development of communication technology, the number of terminals accessing the network wirelessly is increasing. In the current context of the coexistence of 2G, 3G, 4G, and 5G networks, the demand for broadband antennas is increasing. Broadband antennas that can simultaneously cover multiple generations of network standards are in urgent need of design and development. Among various antennas, dual-polarized antennas can achieve better diversity effects and increase communication capacity, so planar dual-polarized broadband antennas have broad application prospects.

[0003] The dual-polarized antenna of the existing technical solution has a complex feeding structure, limited effective working bandwidth, and high manufacturing cost, which is not suitable for large-scale application in terminal antennas. In the large-scale application scenarios of terminal antennas, it is urgently necessary to design a dual-polarized antenna with a simple feeding method and low cost. Utility Model Content

[0004] The main purpose of the utility model is to provide an ultra-wideband dual-polarization antenna, aiming to solve the problems of complex feeding structure, high cost, insufficient bandwidth, etc. of the existing dual-polarization antenna.

[0005] To achieve the above object, the ultra-wideband dual-polarization antenna proposed in the utility model includes:

[0006] Dielectric plate;

[0007] A radiation part, the radiation part is arranged on the dielectric plate, and the radiation part is used to radiate a signal;

[0008] A coaxial line, one end of which is connected to the radiating portion, and the other end of which is used to connect to an external device, and the coaxial line is used to transmit the external device signal to the radiating portion and to feed power.

[0009] In one embodiment, the number of the coaxial lines is two, the two coaxial lines are connected to the center of the radiation portion, and a gap is left between the two coaxial lines and between the two coaxial lines and the dielectric plate.

[0010] In one embodiment, the two coaxial lines each have a bending portion, the bending portion is arranged at one end of the coaxial line, the bending directions of the two bending portions of the two coaxial lines are away from each other, and there is a gap between the two bending portions and between the bending portion and the dielectric plate, and the bending portion is used to prevent short circuit.

[0011] In one embodiment, the radiation portion is provided with parallel line grooves, the parallel line grooves are opened on the radiation portion, the parallel line grooves are arranged axially symmetrically, and the parallel line grooves are used to expand the bandwidth.

[0012] In one embodiment, the radiating portion includes a first radiating portion and a second radiating portion, the dielectric plate has a top surface and a bottom surface, the first radiating portion is arranged on the top surface, the second radiating portion is arranged on the bottom surface, and the first radiating portion and the second radiating portion respectively correspond to two polarizations of the antenna.

[0013] In one embodiment, the first radiating portion has a first polarization direction, the second radiating portion has a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal to each other.

[0014] In one embodiment, the dielectric plate is provided with a via hole, the via hole is arranged corresponding to the coaxial line, and the second radiating portion is connected to the coaxial line by setting a pad on the top surface through the via hole.

[0015] In one embodiment, there are multiple via holes, the multiple via holes are arranged along the first polarization direction, and the multiple via holes are independent of the first radiation portion and / or the second radiation portion.

[0016] In one embodiment, the dielectric plate is further provided with two through holes, and the two through holes are respectively provided corresponding to the two coaxial lines, so as to allow the two coaxial lines to pass through the through holes and be arranged in the dielectric plate.

[0017] In one embodiment, the dielectric plate is further provided with a soldering pad, the soldering pad is arranged on the dielectric plate, and the coaxial line is fixedly arranged on the dielectric plate through the soldering pad.

[0018] The utility model achieves the effects of ultra-wideband and low cost by arranging the radiation part on the dielectric plate, connecting the coaxial line to the center of the radiation part and directly transmitting signals and feeding the radiation part through the coaxial line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of an ultra-wideband dual-polarization antenna in one embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 It is a schematic structural diagram of the first radiation part and the second radiation part in one embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a dielectric plate in one embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of an ultra-wideband dual-polarization antenna in a second embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the measured S parameters of the ultra-wideband dual-polarization antenna of the present utility model.

[0026] Description of Figure Numbers:

[0027] Label name Label name 1000 Ultra-wideband dual-polarization antenna 10 Dielectric board 11 Through Hole 12 Vias 13 Square slot 20 Radiation Department 21 The first radiation 22 The second radiation 30 Coaxial Cable 31 Bending part 32 The first coaxial line 33 The second coaxial line 40 Pads

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] In order to solve the above problems, the utility model proposes an ultra-wideband dual-polarization antenna.

[0033] The ultra-wideband dual-polarization antenna 1000 includes: a dielectric plate 10; a radiating portion 20, the radiating portion 20 is arranged on the dielectric plate 10, and the radiating portion 20 is used to radiate signals; a coaxial line 30, one end of the coaxial line 30 is connected to the radiating portion 20, and the other end of the coaxial line 30 is used to connect to an external device, and the coaxial line 30 is used to transmit the external device signal to the radiating portion 20 and feed it.

[0034] In detail, Figure 1-Figure 6 As shown in the figure, in this embodiment, the radiating part 20 is printed on the dielectric plate 10, and the coaxial line 30 is fed through the coaxial line 30 connected to the radiating part 20. The coaxial line 30 has an inner conductor and an outer conductor. The outer conductor covers the inner conductor. The inner conductor is connected to the radiating part 20 for signal transmission and electrical connection, and the outer conductor is connected to the external ground.

[0035] In this embodiment, the dielectric plate 10 may further be provided with a square groove 13, and the square groove 13 is used for positioning, fixing and connecting with a connecting portion of an external device.

[0036] In detail, when the dual-polarized antenna in the utility model is connected to an external device, it is connected through a connecting portion provided on the external device and through a square groove 13 provided on the dielectric plate 10, including but not limited to snap fixation, connecting pin fixation, bolt fixation and other fixing methods. How the utility model is specifically connected to the external device does not affect the technical effect of the utility model.

[0037] The dielectric constant of the dielectric plate 10 in the present invention is 4.4, and the thickness of the dielectric plate 10 is 1.0 mm. It is understandable that in another embodiment, the dielectric plate 10 can select the corresponding dielectric constant and the thickness of the dielectric plate 10 according to actual needs.

[0038] In one embodiment, there are two coaxial lines 30 , which are connected to the center of the radiation portion 20 , and a gap is left between the two coaxial lines 30 and between the two coaxial lines 30 and the dielectric plate 10 .

[0039] Specifically, characteristic impedance is one of the concepts of the coaxial line 30. In actual applications, in the entire coaxial line 30, high-frequency signals are propagated in the portion between the center conductor and the outer conductor. In order to achieve impedance matching, it is necessary to adjust the position where the coaxial line 30 is connected to the radiating portion 20. Therefore, in this embodiment, the two coaxial lines 30 are connected to the center of the radiating portion 20 in a spatially vertically crossed manner, but a gap is left between the two coaxial lines 30 to avoid contact short circuit.

[0040] In more detail, in the present embodiment, the two coaxial lines 30 are respectively a first coaxial line 32 and a second coaxial line 33. The through hole 11 through which the second coaxial line 33 passes is arranged at a parallel line groove of the first radiating portion 21 on the dielectric plate 10. There is a gap between the first radiating portion 21 and the second coaxial line 33 to prevent the second coaxial line 33 from contacting the first radiating portion 21. The second coaxial line 33 contacts the second radiating portion 22. The second coaxial line 33 is used to transmit signals and feed power to the second radiating portion 22. The first coaxial line 32 passes through the through hole 11 arranged on the dielectric plate 10 to be connected to the first radiating portion 21, and the through hole 11 through which the first coaxial line 32 passes is arranged at a parallel line groove of the second radiating portion 22 on the dielectric plate 10. The first coaxial line 32 also does not contact the second radiating portion 22.

[0041] In one embodiment, the two coaxial lines 30 both have a bending portion 31, which is disposed at one end of the coaxial line 30. The bending directions of the two bending portions 31 of the two coaxial lines 30 are away from each other. Gaps are left between the two bending portions 31 and between the bending portion 31 and the dielectric plate 10. The bending portions 31 are used to prevent short circuits.

[0042] In this embodiment, the bending portion 31 is arranged at the intersection of the spatial vertical projections of the two coaxial lines 30 to avoid contact short circuit between the two coaxial lines 30. In actual production, another implementation method can also be used to achieve the effect of this technology, that is, one of the coaxial lines 30 retains part of the medium to avoid the inner conductors of the two coaxial lines 30 from touching each other.

[0043] In one embodiment, the radiation portion 20 is provided with parallel line grooves, which are opened on the radiation portion 20 and are axially symmetrically arranged to expand the bandwidth.

[0044] In this embodiment, the parallel grooves are opened on the radiating portion 20 along the length direction of the radiating portion 20 , and the parallel grooves are parallel to the parallel parts of the radiating portion 20 . The width of the parallel grooves can be set according to actual needs, and the parallel grooves are used to expand the bandwidth.

[0045] In one embodiment, the radiating portion 20 includes a first radiating portion 21 and a second radiating portion 22. The dielectric plate 10 has a top surface and a bottom surface. The first radiating portion 21 is arranged on the top surface, and the second radiating portion 22 is arranged on the bottom surface. The first radiating portion 21 and the second radiating portion 22 correspond to the two polarizations of the antenna respectively.

[0046] In this embodiment, the first radiating portion 21 and the second radiating portion 22 have polarization directions that are perpendicular by ninety degrees, and the first radiating portion 21 and the second radiating portion 22 have a symmetrical dipole structure. The first radiating portion 21 and the second radiating portion 22 are respectively arranged at two ends of the dielectric plate 10, and then the two radiating portions 20 are cross-crossed and connected to each other to achieve dual polarization.

[0047] In this embodiment, the ultra-wideband dual-polarization antenna 1000 has a first radiating portion 21 and a second radiating portion 22 with polarization directions that are perpendicular by ninety degrees, so that the first radiating portion 21 and the second radiating portion 22 have a symmetrical dipole structure. The first radiating portion 21 and the second radiating portion 22 are respectively arranged on the top surface and the bottom surface of the dielectric plate 10, and then the two radiating portions 20 are cross-crossed and connected to each other to achieve dual polarization.

[0048] In one embodiment, the first radiating portion 21 has a first polarization direction, the second radiating portion 22 has a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal to each other.

[0049] In this embodiment, the first polarization direction is the length direction of the first radiation portion 21, and the second polarization direction is the polarization direction of the second radiation portion 22. The first polarization direction and the second polarization direction are orthogonal to each other.

[0050] In this embodiment, the dielectric plate 10 is provided with a via 12, and the via 12 is arranged corresponding to the coaxial line 30, and the first radiating portion 21 and the second radiating portion 22 are connected through the via 12, wherein the number of vias 12 in this embodiment is multiple, and the multiple vias 12 are arranged along the first polarization direction, and the multiple vias 12 are independent of the first radiating portion 21 and / or the second radiating portion 22.

[0051] In one embodiment, the dielectric plate 10 is provided with a via 12, and the via 12 is arranged corresponding to the coaxial line 30. The second radiating portion 22 arranged on the bottom surface of the dielectric plate 10 sets the pad 40 on the top surface through the via 12, so that the second radiating portion 22 can be connected to the two coaxial lines 30 arranged on the top surface of the dielectric plate 10.

[0052] In the second embodiment, the dielectric plate 10 is further provided with two through holes 11 , and the number of the through holes 11 is two. The two through holes 11 are respectively provided corresponding to the two coaxial lines 30 , so as to allow the two coaxial lines 30 to pass through the dielectric plate 10 through the through holes 11 .

[0053] In the second embodiment, two through holes 11 are respectively arranged at a point on the straight line where two diagonal lines of the dielectric plate 10 are located, and the through holes 11 do not interfere with the radiation part 20. The two through holes 11 are respectively arranged in the gap between the first radiation part 21 and the second radiation part 22, so that the two coaxial lines 30 can pass through the two through holes 11 from one side of the dielectric plate 10 to the other side, and are fixed on the other side of the dielectric plate 10, and there is still a bending portion 31 between the two coaxial lines 30 on the other side to avoid contact between the two coaxial lines 30.

[0054] In one embodiment, the dielectric plate 10 is further provided with a soldering pad 40 , which is disposed on the dielectric plate 10 , and the coaxial line 30 is fixed to the dielectric plate 10 by soldering through the soldering pad 40 .

[0055] In this embodiment, the coaxial line 30 is connected to the dielectric board 10 by welding on the pad 40. The copper layer at the pad 40 is coated with solder resist ink, and the part to be welded is processed by technicians to open solder resist windows to avoid adhesion and circuit breaking of some close lines during welding. A copper layer is left at the edge of the via 12.

[0056] The balun-free structure in the utility model is suitable for use in scenarios where the terminal antenna does not have high requirements for polarization purity. The function of the balun is to suppress the current from flowing back along the coaxial line 30. The current backflow will lead to reduced polarization purity and reduced efficiency. In scenarios where higher polarization purity requirements are required, a balun can be added and power feeding can be performed by connecting the balun.

[0057] The utility model achieves the effects of ultra-wideband and low cost by arranging the radiation part on the dielectric plate, connecting the coaxial line to the center of the radiation part and directly transmitting signals and feeding the radiation part through the coaxial line.

[0058] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An ultra-wideband dual-polarization antenna, characterized in that: include: Dielectric plate; A radiation part, the radiation part is arranged on the dielectric plate, and the radiation part is used to radiate a signal; A coaxial line, one end of which is connected to the radiating portion, and the other end of which is used to connect to an external device, and the coaxial line is used to transmit the external device signal to the radiating portion and to feed power.

2. The ultra-wideband dual-polarization antenna according to claim 1, characterized in that: There are two coaxial lines, and the two coaxial lines are connected to the center of the radiation portion. A gap is left between the two coaxial lines and between the two coaxial lines and the dielectric plate.

3. The ultra-wideband dual-polarization antenna according to claim 2, characterized in that: The two coaxial lines each have a bending portion, which is arranged at one end of the coaxial line. The bending directions of the two bending portions of the two coaxial lines are away from each other. There is a gap between the two bending portions and between the bending portion and the dielectric plate. The bending portion is used to prevent short circuit.

4. The ultra-wideband dual-polarization antenna according to claim 3, characterized in that: The radiation part is provided with parallel line grooves, the parallel line grooves are opened on the radiation part, the parallel line grooves are arranged axially symmetrically, and the parallel line grooves are used to expand the bandwidth.

5. The ultra-wideband dual-polarization antenna according to claim 4, characterized in that: The radiating portion includes a first radiating portion and a second radiating portion. The dielectric plate has a top surface and a bottom surface. The first radiating portion is arranged on the top surface, and the second radiating portion is arranged on the bottom surface. The first radiating portion and the second radiating portion correspond to two polarizations of the antenna respectively.

6. The ultra-wideband dual-polarization antenna according to claim 5, characterized in that: The first radiating portion has a first polarization direction, the second radiating portion has a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal to each other.

7. The ultra-wideband dual-polarization antenna according to claim 6, characterized in that: The dielectric plate is provided with a via hole, and the via hole is arranged corresponding to the coaxial line. The second radiating portion is connected to the coaxial line by setting a pad on the top surface through the via hole.

8. The ultra-wideband dual-polarization antenna according to claim 7, characterized in that: There are multiple via holes, and the multiple via holes are arranged along the first polarization direction. The multiple via holes are independent of the first radiation portion and / or the second radiation portion.

9. The ultra-wideband dual-polarization antenna according to claim 6, characterized in that: The dielectric plate is further provided with two through holes, and the two through holes are respectively provided corresponding to the two coaxial lines, so as to allow the two coaxial lines to pass through the through holes and be arranged in the dielectric plate.

10. The ultra-wideband dual-polarization antenna according to claim 1, wherein: The dielectric plate is further provided with a soldering pad, which is arranged on the dielectric plate, and the coaxial line is fixed to the dielectric plate by welding through the soldering pad.

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