Coupled feed structure and base station antenna unit

Abstract

The utility model discloses a coupling feed structure and a base station antenna unit, the coupling feed structure comprises a first signal conduction band and a second signal conduction band, one end of the first signal conduction band is used for connecting a radiation unit, and one end of the second signal conduction band is used for signal feed-in. The other end of the first signal conduction band and the other end of the second signal conduction band are oppositely arranged and a gap is formed therebetween; through the above structure, in the whole feed process, the feed of the antenna utilizes the coupling effect brought by the coupling structure, electroplating welding is not needed, the assembly efficiency can be improved, and the welding cost can be saved.

Description

Technical Field

[0001] The utility model relates to the field of antennas, in particular to a coupling feeding structure and a base station antenna unit. Background Art

[0002] The current large-scale construction of mobile communication networks requires a large number of base station antennas to support it. How to improve the production efficiency of base station antennas and reduce production costs is the focus of the industry; traditional base station antenna units are assembled by electroplating welding, which requires a certain amount of man-hours and also brings certain production costs, leaving a large room for optimization; therefore, a coupled feed structure and a base station antenna unit are urgently needed to solve the above problems. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a coupling feeding structure and a base station antenna unit.

[0004] An embodiment of the utility model adopts a technical solution to solve its technical problem: a coupled feeding structure, including a first signal conductive band and a second signal conductive band, one end of the first signal conductive band is used to connect the radiation unit, one end of the second signal conductive band is used for signal feeding, and the other end of the first signal conductive band is arranged opposite to the other end of the second signal conductive band with a gap between the two.

[0005] As one of the preferred embodiments of the present invention, the other end of the first signal guide strip is provided with a first signal conduit, and the other end of the second signal guide strip is inserted into the first signal conduit with a gap between the other end and the inner wall of the first signal conduit.

[0006] As one of the preferred embodiments of the present utility model, the first signal conduit is configured as a square tube.

[0007] As one of the preferred embodiments of the utility model, a second signal conduit is provided at the other end of the first signal guide strip, a third signal conduit is provided at the other end of the second signal guide strip, and the third signal conduit is inserted into the second signal conduit and has a gap with the inner wall of the second signal conduit.

[0008] As one of the preferred embodiments of the utility model, the second signal conduit is provided with a first crack running through both ends thereof, and the third signal conduit is provided with a second crack running through both ends thereof.

[0009] As one of the preferred embodiments of the present utility model, the first signal conductor and the first crack are arranged on both sides of the second signal conductor and the first crack and the second signal conductor are located on the same side, the second signal conductor and the second crack are arranged on both sides of the third signal conductor and the second crack and the first signal conductor are located on the same side.

[0010] As one of the preferred embodiments of the present utility model, the second signal conduit and the third signal conduit are formed by bending a metal plate to form a first crack and a second crack.

[0011] As one of the preferred embodiments of the present invention, the cross section of the other end of the first signal conductive strip gradually decreases along the signal transmission direction, and the cross section of the other end of the second signal conductive strip gradually increases along the signal transmission direction.

[0012] A base station antenna unit comprises the coupling feeding structure.

[0013] The beneficial effects of the utility model include: a coupled feeding structure and a base station antenna unit, the coupled feeding structure comprising a first signal band and a second signal band, one end of the first signal band is used to connect a radiation unit, one end of the second signal band is used to feed in a signal, the other end of the first signal band is arranged opposite to the other end of the second signal band and there is a gap between the two; through the above structure, during the entire feeding process, the feeding of the antenna utilizes the coupling effect brought by the coupling structure, and does not require electroplating and welding, which can improve assembly efficiency and save welding costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is a first structural schematic diagram of a first embodiment of a base station antenna unit;

[0016] Figure 2 is a second structural schematic diagram of a first embodiment of a base station antenna unit;

[0017] Figure 3 It is a first structural schematic diagram of a first embodiment of a coupled feeding structure;

[0018] Figure 4 It is a second structural schematic diagram of a first embodiment of a coupled feeding structure;

[0019] Figure 5 It is a first structural schematic diagram of a second embodiment of a base station antenna unit;

[0020] Figure 6 is a second structural schematic diagram of a second embodiment of a base station antenna unit;

[0021] Figure 7 It is a first structural schematic diagram of a second embodiment of a coupled feeding structure;

[0022] Figure 8 is a second structural schematic diagram of a second embodiment of a coupled feeding structure;

[0023] Fig. 9 It is a first structural schematic diagram of a third embodiment of a base station antenna unit;

[0024] Fig.10 is a second structural schematic diagram of a third embodiment of a base station antenna unit;

[0025] Fig.11 It is a schematic diagram of the first structure of a third embodiment of a coupled feeding structure;

[0026] Fig.12 It is a second structural schematic diagram of the third embodiment of a coupled feeding structure. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0031] Reference Figures 1 to 12A coupled feeding structure includes a first signal conducting strip 10 and a second signal conducting strip 20, wherein one end of the first signal conducting strip 10 is used to connect a radiation unit, one end of the second signal conducting strip 20 is used to feed a signal, and the other end of the first signal conducting strip 10 is arranged opposite to the other end of the second signal conducting strip 20 with a gap therebetween.

[0032] Reference Figure 1-2 , 5-6 and 9-10, the antenna unit includes a first dipole arm pair 1-1, a second dipole arm pair 1-2, a first balun 2-1 and a second balun 2-2, wherein the midpoints of the first dipole arm pair 1-1 and the second dipole arm pair 1-2 coincide with each other and are orthogonally arranged at ±45 degrees for dual-polarization radiation; the horizontal section of each dipole arm is approximately an isosceles right triangle, the right-angled vertices of the two dipole arms in each dipole arm pair are opposite, and there is a certain distance between the two vertices, the first dipole arm pair 1-1 is connected to the first dipole arm pair support structure 3-1 below it, the second dipole arm pair 1-2 is connected to the second dipole arm pair support structure 3-2 below it, the first dipole arm pair support structure 3-1 and the second dipole arm pair support structure 3-2 are connected at the bottom and are in contact with the ground plate 60.

[0033] There is a gap between the first dipole arm pair 1-1 and the second dipole arm pair 1-2, that is, two gaps are formed, and the first balun 2-1 and the second balun 2-2 are respectively placed in the two gaps, and each balun has an interval of equal width with the dipole arms on both sides thereof; the first balun 2-1 and the second balun 2-2 both include a vertical structure;

[0034] The bottom end of the vertical structure of the first balun 2-1 is extended through the ground plate 60 to be connected to the first signal conductor 10 of the first group of coupling feeding structures. The bottom end of the vertical structure of the second balun 2-2 is extended through the ground plate 60 to be connected to the first signal conductor 10 of the second group of coupling feeding structures. The first balun 2-1, the second balun 2-2, the first group of coupling feeding structures and the second group of coupling feeding structures are not in contact with the ground plate 60, and maintain a certain distance from the ground plate 60; the second signal conductor 20 of the first group of coupling feeding structures is connected to the phase shifter 7-1, and the second signal conductor 20 of the second group of coupling feeding structures is connected to the phase shifter 7-2. The signals from the phase shifter 7-1 and the phase shifter 7-2 are respectively fed into the antenna through the first group of coupling feeding structures and the second group of coupling feeding structures, thereby realizing the feeding of the dual-polarization dipole antenna unit.

[0035] 1. Reference Figure 1-4, as the first embodiment of the utility model, that is, a dual-polarization dipole antenna unit with stripline coupling feeding; wherein the structure of the antenna unit is as described above; the main difference of this embodiment lies in the feeding structure at the bottom of the antenna unit; the bottom end of the vertical structure of the first balun 2-1 is connected to the first signal conductor 10 of the first group of coupling feeding structures, and the bottom end of the vertical structure of the second balun 2-2 is connected to the first signal conductor 10 of the second group of coupling feeding structures, the second signal conductor 20 of the first group of coupling feeding structures and the second signal conductor 20 of the second group of coupling feeding structures pass through the ground plate 60 to the bottom of the ground plate 60, extend and are respectively connected to the phase shifter 7-1 and the phase shifter 7-2, the signals from the phase shifter 7-1 and the phase shifter 7-2 are respectively fed into the antenna through the first group of coupling feeding structures and the second group of coupling feeding structures, thereby realizing the feeding of the dual-polarization dipole antenna unit; the stripline coupling part is a parallel plate capacitor, and its working mode is a quasi-TEM mode.

[0036] Figure 3-4 The strip-line coupled feeding structure is shown, which includes a first signal conductive strip 10 and a second signal conductive strip 20. The first signal conductive strip 10 and the second signal conductive strip 20 are in the shape of long strips, each of which has one end close to each other, and the two ends that are not close to each other are respectively connected to the antenna unit and the phase shifter.

[0037] In this embodiment, the signal from the phase shifter is fed into the end of the second signal conductive strip 20, and then transmitted along the second signal conductive strip 20. At the position where the second signal conductive strip 20 and the first signal conductive strip 10 are close to each other, the signal is coupled to the vicinity of the first signal conductive strip 10 through spatial coupling, and then the signal continues to be transmitted along the first signal conductive strip 10, and finally fed into the antenna unit through the end of the first signal conductive strip 10 to realize the feeding of the antenna. In the whole feeding process, the feeding of the antenna utilizes the coupling effect brought by the strip line coupling structure, and does not require electroplating welding. This can improve assembly efficiency and save welding costs.

[0038] 2. Reference Figure 5-8, as the second embodiment of the utility model, that is, a dual-polarization dipole antenna unit with stripline coupling feeding, wherein the structure of the antenna unit is as described above; the main difference of this embodiment lies in the feeding structure at the bottom of the antenna unit, the bottom end of the vertical structure of the first balun 2-1 is connected to the first signal conductive strip 10 of the first group of coupling feeding structures, and the bottom end of the vertical structure of the second balun 2-2 is connected to the first signal conductive strip 10 of the second group of coupling feeding structures, the first group of coupling feeding structures and the second group of coupling feeding structures are both located above the ground plate 60, and the other ends of the first signal conductive strips 10 of the two are bent through the ground plate 60 to the bottom of the ground plate 60, and then extend to the ground plate 60 respectively. The phase shifter 7-1 is connected to the phase shifter 7-2, and the signals from the phase shifter 7-1 and the phase shifter 7-2 are respectively fed into the antenna through the second signal guide strip 20, the first signal guide strip 30 and the first signal guide strip 10, thereby feeding the dual-polarization dipole antenna unit. When the current is conducted from the second signal guide strip 20 to the first signal guide strip 30, since the two metal components form an air waveguide strip line structure, the electric field working mode is changed from the quasi-TEM mode to the pure TEM mode. At the same time, when the current is coupled from the second signal guide strip 20 to the inner wall of the first signal guide strip 30, the current phase is deflected by 90 degrees, and then flows to the antenna through the first signal guide strip 10.

[0039] Figure 7-8 The stripline coupled feeding structure is shown, in which a first signal conduit 30 is provided at the other end of the first signal conductive strip 10, and the other end of the second signal conductive strip 20 is inserted into the first signal conduit 30 and has a gap with the inner wall of the first signal conduit 30, and the first signal conduit 30 is preferably configured as a square tube, which can be easily adapted and installed with a rectangular thin metal signal conductive strip.

[0040] In this embodiment, the signal from the phase shifter is fed into from the bottom end of the second signal conductive strip 20, and then transmitted upward along the second signal conductive strip 20. At the top end of the second signal conductive strip 20, the signal is coupled to the vicinity of the first signal conductive strip 30 through the gap between the second signal conductive strip 20 and the first signal conductive strip 30, and transmitted upward along the first signal conductive strip 30. After passing through the end of the first signal conductive strip 30, the signal continues to be transmitted upward along the first signal conductive strip 10, and is finally fed into the antenna to realize power feeding of the antenna. During the entire power feeding process, the power feeding of the antenna utilizes the coupling effect brought by the stripline coupling structure, and does not require electroplating welding, thereby eliminating the welding process, which helps to simplify the assembly process of the antenna unit, improve production efficiency, and save welding costs.

[0041] 3. Reference Figure 9-12As the third embodiment of the utility model, i.e., the copper tube coupled feeding dual polarized dipole antenna unit, a second signal conduit 41 is provided at the other end of the first signal conduit 10, a third signal conduit 42 is provided at the other end of the second signal conduit 20, the third signal conduit 42 is inserted in the second signal conduit 41 and has a gap with the inner wall of the second signal conduit 41; after the second signal conduit 20 conducts the current of the phase shifter, it first passes through a section of metal strip line with a gradual cross section, and the working mode at this time is TEM mode; when the current reaches the coupling part between the second signal conduit 41 and the third signal conduit 42 (the second signal conduit 41 and the third signal conduit 42 are made of copper tubes), since the second signal conduit 41 and the third signal conduit 42 are nested to form a coaxial line, the electric field is only conducted at the gap between the two copper tubes, and the current working mode is quasi-TEM mode at this time; at the same time, the current is coupled to the second signal conduit 41 by the third signal conduit 42, and the current phase changes by 90 degrees before entering the first signal conduit 10, and then enters the antenna to realize the transmission of the current.

[0042] Figure 11-12 The copper tube coupled feeding structure is shown, and the second signal conduit 41 is provided with a first crack 51 running through both ends thereof, and the third signal conduit 42 is provided with a second crack 52 running through both ends thereof; gaps are opened in the second signal conduit 41 and the third signal conduit 42, so that the second signal conduit 41 and the third signal conduit 42 are not closed, which can facilitate the flexible control of the sizes of the second signal conduit 41 and the third signal conduit 42 during the actual installation process, and at the same time play a role in reducing material process costs.

[0043] In this embodiment, the signal from the phase shifter is fed from the bottom end of the second signal guide 20, and then transmitted upward along the second signal guide 20. At the top end of the second signal guide 20, the signal is coupled to the vicinity of the second signal guide 41 through the gap between the third signal conduit 42 and the second signal conduit 41. Then, the signal is transmitted upward along the second signal conduit 41, and fed into the antenna through the first signal conduit 10 at the top of the second signal conduit 41, thereby feeding the antenna. In the entire feeding process, the feeding of the antenna utilizes the coupling effect brought by the coupling structure of the second signal conduit 41 and the third signal conduit 42, and does not require electroplating welding, thereby eliminating the welding process, which is conducive to reducing the difficulty of assembling the antenna unit, improving production efficiency, and eliminating welding costs.

[0044] Preferably, the first signal conductor 10 and the first crack 51 are arranged on both sides of the second signal conductor 41 and the first crack 51 and the second signal conductor 20 are located on the same side, the second signal conductor 20 and the second crack 52 are arranged on both sides of the third signal conductor 42 and the second crack 52 and the first signal conductor 10 are located on the same side; this can facilitate the installation of the copper tube coupled feeding structure and also balance the stress during the installation of the first signal conductor 10 and the second signal conductor 20.

[0045] Preferably, the second signal conduit 41 and the third signal conduit 42 are formed by bending metal plates to form the first crack 51 and the second crack 52; this not only reduces the processing cost but also enables the diameters of the second signal conduit 41 and the third signal conduit 42 to be adjusted according to actual installation conditions.

[0046] The cross section of the other end of the first signal conductor 10 gradually decreases along the signal transmission direction, and the cross section of the other end of the second signal conductor 20 gradually increases along the signal transmission direction; this arrangement can match the impedance between components and reduce losses.

[0047] A base station antenna unit comprises the coupling feeding structure.

[0048] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A coupled feed structure, characterized in that: The invention comprises a first signal conductive strip (10) and a second signal conductive strip (20), wherein one end of the first signal conductive strip (10) is used for connecting a radiation unit, one end of the second signal conductive strip (20) is used for signal feeding, and the other end of the first signal conductive strip (10) is arranged opposite to the other end of the second signal conductive strip (20) with a gap therebetween.

2. A coupling feed structure according to claim 1, characterized in that: The other end of the first signal guide strip (10) is provided with a first signal conduit (30), and the other end of the second signal guide strip (20) is inserted into the first signal conduit (30) and has a gap with the inner wall of the first signal conduit (30).

3. A coupling feed structure according to claim 2, characterized in that: The first signal conduit (30) is configured as a square tube.

4. A coupling feed structure according to claim 1, characterized in that: A second signal conduit (41) is provided at the other end of the first signal guide strip (10), and a third signal conduit (42) is provided at the other end of the second signal guide strip (20); the third signal conduit (42) is inserted into the second signal conduit (41) and has a gap with the inner wall of the second signal conduit (41).

5. A coupling feed structure according to claim 4, characterized in that: The second signal conduit (41) is provided with a first slit (51) running through both ends thereof, and the third signal conduit (42) is provided with a second slit (52) running through both ends thereof.

6. A coupling feed structure according to claim 5, characterized in that: The first signal conductive strip (10) and the first slit (51) are arranged on both sides of the second signal conductive strip (41), and the first slit (51) and the second signal conductive strip (20) are located on the same side; the second signal conductive strip (20) and the second slit (52) are arranged on both sides of the third signal conductive strip (42), and the second slit (52) and the first signal conductive strip (10) are located on the same side.

7. A coupling feed structure according to claim 5, characterized in that: The second signal conduit (41) and the third signal conduit (42) are formed by bending a metal plate to form the first crack (51) and the second crack (52).

8. A coupling feed structure according to claim 4, characterized in that: The cross section of the other end of the first signal conductive strip (10) gradually decreases along the signal transmission direction, and the cross section of the other end of the second signal conductive strip (20) gradually increases along the signal transmission direction.

9. A base station antenna unit, characterized in that: It comprises the coupling feed structure as described in any one of claims 1 to 8.

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