Radiation oscillator and base station antenna

Abstract

The utility model relates to a radiation oscillator and a base station antenna, and the radiation oscillator comprises a balun part which is used for feeding the radiation oscillator; the radiant panel is electrically connected with the balun component; the first metal layer is arranged on the first side of the radiant panel; the second metal layer is arranged on the second side, opposite to the first side, of the radiant panel, and the first projection, relative to the radiant panel, of the first metal layer and the second projection, relative to the radiant panel, of the second metal layer are at least partially overlapped. In the radiation oscillator, the first projection of the first metal layer and the second projection of the second metal layer relative to the radiation plate are at least partially overlapped, so that a capacitance filter capable of effectively filtering low-frequency interference can be formed. Therefore, the capacitance filter can restrain low-frequency signals, the filtering effect is achieved, the restraining of the radiation unit on the influence of the low-frequency signals is achieved, and the influence of the radiation oscillator on the radiation oscillator generating the low-frequency signals can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of antenna communication, and in particular to a radiation vibrator and a base station antenna comprising the radiation vibrator. Background Art

[0002] With the development of the new generation of mobile communications (especially 5G), the antennas in communication equipment need to cover more and more frequency bands. In the existing multi-band fusion antennas, the mutual coupling interference between different frequency bands has always been one of the key research directions of base station antennas. Among them, the interference of the high-frequency unit to the lower-frequency signal is usually the current of the low-frequency antenna flowing through the floor to the high-frequency antenna unit, thereby generating common-mode resonance. If the common-mode signal is not effectively suppressed, the signal will be radiated through the entire path of the high-frequency unit, which in turn affects the low-frequency antenna.

[0003] At the same time, in the existing multi-band base station antenna, multiple columns of high-frequency arrays are placed in the limited size of the antenna, and the mutual influence between the columns of the high-frequency array will be very serious; secondly, the working bandwidth requirements of the high-frequency unit itself are also getting wider and wider. Therefore, it is particularly important to design an ultra-wideband and miniaturized high-frequency unit.

[0004] The radiation unit disclosed in the prior art and the base station antenna including the radiation unit usually achieve the low-frequency decoupling effect by constructing an inductor-capacitor LC band-stop filter, and the bandwidth that can be targeted is limited. Utility Model Content

[0005] Based on the understanding of the prior art, the inventor of the present utility model innovatively thought of using a capacitor filter instead of an inductor capacitor filter to achieve signal filtering, so as to adapt to high-bandwidth application requirements. In other words, the present utility model proposes a new type of radiating oscillator, which forms a metal layer on both sides of a radiating plate such as a printed circuit board, and the overlapping parts of the two metal layers form a capacitor filter. Here, the capacitor filter can suppress lower-frequency signals and achieve a filtering effect, thereby achieving the suppression of the influence of the radiating unit on the lower-frequency signal, and further reducing the influence of the radiating oscillator according to the utility model on the second-band radiating oscillator that generates a lower-frequency signal than the radiating oscillator according to the utility model, thereby improving the radiation performance of the second-band radiating oscillator used with the radiating oscillator of the utility model.

[0006] Specifically, the utility model proposes a radiation vibrator, which comprises:

[0007] A balun component, the balun component being configured to feed the radiating element;

[0008] a radiation plate, the radiation plate being electrically connected to the balun component;

[0009] A first metal layer, the first metal layer is disposed on a first side of the radiation plate; and

[0010] a second metal layer, the second metal layer being disposed on a second side of the radiation plate opposite to the first side,

[0011] The first projection of the first metal layer relative to the radiation plate and the second projection of the second metal layer relative to the radiation plate at least partially overlap.

[0012] In the radiation vibrator disclosed according to the utility model, since the first projection of the first metal layer relative to the radiation plate and the second projection of the second metal layer relative to the radiation plate at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower frequency signals and achieve a filtering effect, thereby suppressing the influence of the radiation unit on the lower frequency signal, and further reducing the influence of the radiation vibrator according to the utility model on the radiation vibrator that generates a lower frequency signal than the frequency of the radiation vibrator according to the utility model, thereby improving the radiation performance of the second frequency band radiation vibrator used with the radiation vibrator of the utility model.

[0013] In one embodiment of the present invention, the first metal layer and the second metal layer partially overlap to form a capacitive filter. Here, the capacitive filter can suppress the lower frequency signal and achieve the filtering effect, thereby suppressing the influence of the radiation unit on the lower frequency signal, thereby reducing the influence of the radiation oscillator according to the present invention on the radiation oscillator that generates a lower frequency signal than the radiation oscillator according to the present invention, thereby improving the radiation performance of the second frequency band radiation oscillator used with the radiation oscillator of the present invention.

[0014] In one embodiment of the utility model, the first metal layer includes four radiating arms. Preferably, in one embodiment of the utility model, the four radiating arms form two polarized radiating arms. More preferably, in one embodiment of the utility model, each of the two polarized radiating arms includes two oppositely disposed radiating arms. More preferably, in one embodiment of the utility model, the two polarized radiating arms are electrically connected to each other. In this way, the length of the radiating arm can be extended, thereby further reducing the size of the radiating oscillator, so that the radiating oscillator according to the utility model is further miniaturized.

[0015] In one embodiment of the present invention, the radiating oscillator further comprises at least one parasitic guide plate, and the at least one parasitic guide plate is arranged on the side of the second metal layer away from the balun component. Here, one side of the radiating oscillator is provided with a parasitic guide plate to assist in unit matching. Here, the parasitic guide plate is not limited to a single layer, and multiple layers of parasitic guide plates may also be provided. In addition, the parasitic guide plate is not limited to a single layer, and multiple parasitic guide plates may also be provided. The form of the parasitic guide plate is not limited, and according to the embodiment of the present invention, only a parasitic guide plate with a closed loop structure is provided. In summary, preferably, in one embodiment of the present invention, the radiating oscillator comprises multiple layers of parasitic guide plates. More preferably, in one embodiment of the present invention, the parasitic guide plate is constructed as a closed loop structure.

[0016] In one embodiment of the present invention, the radiation board and the balun component are constructed as a printed circuit board.

[0017] In addition, a second aspect of the present utility model provides a base station antenna, which includes the radiation element according to the first aspect of the present utility model.

[0018] In one embodiment of the present invention, the base station antenna includes: at least one radiating element according to the first aspect of the present invention, the radiating element being constructed as a first frequency band radiating element; at least one second frequency band radiating element, wherein the operating frequency band of the second frequency band radiating element is lower than the operating frequency band of the first frequency band radiating element; and a reflecting plate, wherein the first frequency band radiating element and the second frequency band radiating element are installed on the same side of the reflecting plate and the distance between the second frequency band radiating element and the reflecting plate is greater than the distance between the first frequency band radiating element and the reflecting plate, and wherein the filtering band of the capacitor filter formed by the first metal layer and the second metal layer of the first frequency band radiating element matches the operating frequency band of the second frequency band radiating element.

[0019] In summary, in the radiation vibrator disclosed according to the utility model, since the first projection of the first metal layer relative to the radiation plate and the second projection of the second metal layer relative to the radiation plate at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower frequency signals and achieve a filtering effect, thereby suppressing the influence of the radiation unit on the lower frequency signal, and further reducing the influence of the radiation vibrator according to the utility model on the radiation vibrator that generates a lower frequency signal than the frequency of the radiation vibrator according to the utility model, thereby improving the radiation performance of the second frequency band radiation vibrator used with the radiation vibrator of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The embodiments are shown and explained with reference to the accompanying drawings. These drawings are used to explain the basic principles, and only the aspects necessary for understanding the basic principles are shown. These drawings are not to scale. In the drawings, the same reference numerals represent similar features.

[0021] Figure 1 A schematic structural diagram of a first metal layer disclosed according to an embodiment of the utility model is shown;

[0022] Figure 2 A schematic diagram of the structure of a second metal layer disclosed according to an embodiment of the utility model is shown;

[0023] Figure 3 A top view of a radiation vibrator according to an embodiment of the utility model is shown;

[0024] Figure 4A A top view of a radiation vibrator according to another embodiment of the utility model is shown;

[0025] Figure 4B A three-dimensional diagram showing a radiation vibrator according to another embodiment of the utility model; and

[0026] Figure 5 FIG. 5 is a schematic diagram of a base station antenna 500 according to an embodiment of the present utility model.

[0027] Other features, characteristics, advantages and benefits of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0028] In the following specific description of the preferred embodiments, reference will be made to the attached drawings that constitute a part of the present invention. The attached drawings show, by way of example, specific embodiments that can implement the present invention. The illustrative embodiments are not intended to be exhaustive of all embodiments according to the present invention. It will be appreciated that other embodiments may be utilized, and structural or logical modifications may be made without departing from the scope of the present invention. Therefore, the following specific description is not restrictive, and the scope of the present invention is defined by the attached claims.

[0029] Based on the understanding of the prior art, the inventor of the present utility model innovatively forms a filter capacitor with the help of a first metal layer and a second metal layer arranged on both sides of the radiation plate, that is, because the first projection of the first metal layer relative to the radiation plate and the second projection of the second metal layer relative to the radiation plate at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower-frequency signals and achieve a filtering effect, thereby achieving the suppression of the influence of the radiation unit on the lower-frequency signal, and further reducing the influence of the radiation oscillator according to the utility model on the radiation oscillator that generates a lower-frequency signal than the frequency of the radiation oscillator according to the utility model, thereby improving the radiation performance of the second-frequency band radiation oscillator used with the radiation oscillator of the utility model. In other words, the utility model proposes a new type of radiation oscillator. The radiating vibrator of the technical solution disclosed in the utility model includes: a balun component, the balun component is configured to feed the radiating vibrator; a radiating plate, the radiating plate is electrically connected to the balun component; a first metal layer, the first metal layer is arranged on a first side of the radiating plate; and a second metal layer, the second metal layer is arranged on a second side of the radiating plate opposite to the first side, wherein the first metal layer relative to the first projection of the radiating plate and the second metal layer relative to the second projection of the radiating plate at least partially overlap. In the radiating vibrator disclosed in the utility model, since the first projection of the first metal layer relative to the radiating plate and the second projection of the second metal layer relative to the radiating plate at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower frequency signals and achieve the filtering effect, thereby achieving the suppression of the influence of the radiating unit on the lower frequency signal, and then also reducing the influence of the radiating vibrator according to the utility model on the radiating vibrator that generates a lower frequency signal with a lower frequency than the radiating vibrator according to the utility model, thereby improving the radiation performance of the second frequency band radiating vibrator used with the radiating vibrator of the utility model.

[0030] The following describes the radiation oscillator and the corresponding base station antenna according to the present invention with reference to the accompanying drawings. Figure 1 A schematic structural diagram of a first metal layer disclosed according to an embodiment of the utility model is shown; Figure 2 A schematic diagram of the structure of a second metal layer disclosed according to an embodiment of the utility model is shown; Figure 3 FIG. 4 shows a top view of a radiation vibrator according to an embodiment of the utility model; and Figure 4A A top view of a radiation vibrator according to another embodiment of the utility model is shown; Figure 4B A three-dimensional diagram of a radiation vibrator according to another embodiment of the utility model is shown, and Figure 5FIG. 5 is a schematic diagram of a base station antenna 500 according to an embodiment of the present utility model.

[0031] from Figure 1 It can be seen that the radiation oscillator according to the utility model includes a first metal layer, which is arranged on the first side of the radiation board 130, for example, on the lower side of the radiation board 130. In this embodiment, the radiation board 130 is a printed circuit board (PCB), and the first metal layer 110 includes, for example, four radiation arms 111, 112, 113 and 114, which are electrically connected. As a result, the length of the radiation arm can be extended in this way, so that the size of the radiation oscillator can be further reduced, so that the radiation oscillator according to the utility model is further miniaturized. In summary, in one embodiment of the utility model, the first metal layer includes four radiation arms. Preferably, in one embodiment of the utility model, the four radiation arms form two polarized radiation arms. More preferably, in one embodiment of the utility model, each of the two polarized radiation arms includes two oppositely arranged radiation arms. More preferably, in one embodiment of the utility model, the two polarized radiation arms are electrically connected to each other.

[0032] Figure 2 FIG. 1 shows a schematic diagram of the structure of the second metal layer disclosed in an embodiment of the utility model. Figure 2 It can be seen that the radiation oscillator according to the present invention includes a second metal layer 120, and the second metal layer 120 is disposed on the radiation plate 130 and the first side (eg Figure 1 The second side of the radiation board 130 is opposite to the side shown in the figure, for example, the upper side of the radiation board 130. It can also include four sub-parts, for example, sub-parts 121, 122, 123 and 124. Here, the sub-parts 121, 122, 123 and 124 can respectively correspond to the above-mentioned four radiation arms 111, 112, 113 and 114, for example.

[0033] After assembly, Figure 3 As shown. Among them, Figure 3 FIG. 2 shows a top view of a radiation vibrator according to an embodiment of the present utility model. Figure 3 It can be seen that the radiation oscillator 100 proposed in the present invention includes a balun component (refer to Figure 4B), the balun component is constructed to feed the radiating oscillator. In addition, the radiating oscillator 100 proposed in the utility model also includes a radiating plate 130, and the radiating plate 130 is electrically connected to the balun component. Next, the radiating oscillator 100 proposed in the utility model also includes a first metal layer 110, which is arranged on a first side (for example, a lower side) of the radiating plate 130; and a second metal layer 120, which is arranged on a second side (for example, an upper side) of the radiating plate 130 opposite to the first side (for example, the lower side), wherein a first projection of the first metal layer 110 relative to the radiating plate 130 and a second projection of the second metal layer 120 relative to the radiating plate 130 at least partially overlap to form an overlapping portion 1020. In summary, in the radiation vibrator 100 disclosed according to the utility model, since the first projection of the first metal layer 110 relative to the radiation plate 130 and the second projection of the second metal layer 120 relative to the radiation plate 130 at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower-frequency signals and achieve a filtering effect, thereby suppressing the influence of the radiation unit on the lower-frequency signal, and further reducing the influence of the radiation vibrator according to the utility model on the radiation vibrator that generates a lower-frequency signal than the frequency of the radiation vibrator according to the utility model, thereby improving the radiation performance of the second-frequency band radiation vibrator used with the radiation vibrator of the utility model.

[0034] like Figure 3 As shown, in one embodiment according to the utility model, the first metal layer 110 and the second metal layer 120 partially overlap to form a capacitor filter. In this way, a capacitor filter that effectively filters out low-frequency interference can be formed. Here, the capacitor filter can suppress lower frequency signals and achieve a filtering effect, thereby suppressing the influence of the radiation unit on the lower frequency signal, and further reducing the influence of the radiation oscillator according to the utility model on the radiation oscillator that generates a lower frequency signal than the frequency of the radiation oscillator according to the utility model, thereby improving the radiation performance of the second frequency band radiation oscillator used with the radiation oscillator of the utility model.

[0035] In summary, if Figure 1As shown, in one embodiment according to the utility model, the first metal layer includes four radiating arms. Preferably, in one embodiment according to the utility model, the four radiating arms form two polarized radiating arms. More preferably, in one embodiment according to the utility model, each of the two polarized radiating arms includes two oppositely arranged radiating arms. More preferably, in one embodiment according to the utility model, the two polarized radiating arms are electrically connected to each other. In this way, the length of the radiating arm can be extended, thereby further reducing the size of the radiating oscillator, so that the radiating oscillator according to the utility model is further miniaturized.

[0036] In order to further optimize the radiation performance of the radiation oscillator according to the utility model, the radiation oscillator according to the utility model can further include a parasitic guide plate. Figure 4A A top view of a radiation vibrator according to another embodiment of the utility model is shown, and Figure 4B FIG. 2 shows a stereogram of a radiation vibrator according to another embodiment of the present utility model. Figure 4A and Figure 4B As shown, in one embodiment of the present invention, the radiation oscillator 400 further includes at least one parasitic guide plate 440, and the at least one parasitic guide plate 440 is arranged on the side of the second metal layer 420 away from the radiation plate 430 or the dielectric plate 430 and the balun component 450. Here, the parasitic guide plate 440 is provided above the radiation oscillator 400, which can be implemented in the form of a guide plate 440 or a parasitic plate 440' to assist in unit matching. Here, the parasitic guide plate 440 is not limited to a single layer, and multiple layers of parasitic guide plates 440 can also be provided. In addition, the parasitic guide plate 440 is not limited to a single layer, and multiple parasitic guide plates 440 can also be provided. The form of the parasitic guide plate 440 is not limited, and according to the embodiment of the present invention, only a parasitic guide plate 440 with a closed loop structure is provided. In summary, preferably, in one embodiment according to the present invention, the radiation oscillator 400 may include a multi-layer parasitic director 440. More preferably, in one embodiment according to the present invention, the parasitic director 440 is constructed as a closed loop structure. Preferably, in one embodiment according to the present invention, the balun component 450 is constructed as a printed circuit board.

[0037] In addition, the second aspect of the present invention proposes a base station antenna, which includes the radiating element according to the first aspect of the present invention. In summary, in the radiating element disclosed in accordance with the present invention, since the first projection of the first metal layer relative to the radiating plate and the second projection of the second metal layer relative to the radiating plate at least partially overlap, a capacitive filter that effectively filters out low-frequency interference can be formed. Here, the capacitive filter can suppress lower-frequency signals and achieve a filtering effect, thereby achieving the suppression of the influence of the radiating unit on the lower-frequency signal, and further reducing the influence of the radiating element according to the present invention on the radiating element that generates a lower-frequency signal than the frequency of the radiating element according to the present invention, thereby improving the radiation performance of the second-frequency band radiating element used with the radiating element of the present invention. Figure 5 FIG. 5 is a schematic diagram of a base station antenna 500 according to an embodiment of the present utility model. Figure 5 It can be seen that the base station antenna 500 according to the utility model includes a second frequency band radiation oscillator 560 and a first frequency band radiation oscillator 580. Specifically, in the multi-band antenna of the related art, for example, including a first frequency band radiation oscillator 580 and a second frequency band radiation oscillator 560, the radiation signal of the second frequency band radiation oscillator 560 will be coupled to the first frequency band radiation oscillator 580. The low-frequency signal coupled to the first frequency band radiation oscillator 580 will interfere with the radiation signal of the second frequency band radiation oscillator 560 itself, thereby destroying the radiation effect of the second frequency band radiation oscillator 560. Therefore, it is necessary to add the following to the first frequency band radiation oscillator 580: Figure 3The filtering structure shown, i.e., the capacitor filter, is used to filter out the low-frequency signal coupled to the first-band radiation oscillator 580, so as to improve the performance of the second-band radiation oscillator 560. At this time, according to the utility model, the first-band radiation oscillator 580 includes the features of the capacitor filter in the above-mentioned embodiment, and the capacitor filter of the first-band radiation oscillator 580 is equivalent to a low-resistance filter, thereby filtering out the low-frequency radiation signal coupled to the first-band radiation oscillator 580, thereby improving the radiation performance of the second-band radiation oscillator 560. In summary, in one embodiment of the present invention, the base station antenna includes: at least one radiating element according to the first aspect of the present invention, the radiating element is constructed as a first frequency band radiating element, and the first frequency band radiating element is, for example, constructed as a high frequency radiating element; at least one second frequency band radiating element, and the second frequency band radiating element is, for example, constructed as a low frequency radiating element, wherein the operating frequency band of the second frequency band radiating element is lower than the operating frequency band of the first frequency band radiating element; and a reflecting plate, wherein the first frequency band radiating element and the second frequency band radiating element are installed on the same side of the reflecting plate and the distance between the second frequency band radiating element and the reflecting plate is greater than the distance between the first frequency band radiating element and the reflecting plate, and wherein the filtering band of the capacitor filter formed by the first metal layer and the second metal layer of the first frequency band radiating element matches the operating frequency band of the second frequency band radiating element. Figure 5 In the embodiment shown, the filtering band of the capacitor filter formed by the first metal layer and the second metal layer of the first frequency band radiating oscillator 580 matches the working frequency band of the second frequency band radiating oscillator 560, and the first frequency band radiating oscillator 580 and the second frequency band radiating oscillator 560 are installed on the same side of the reflecting plate (for example Figure 5 The side closer to the paper as shown) and the distance between the second frequency band radiation vibrator 560 and the reflection plate is greater than the distance between the first frequency band radiation vibrator 580 and the reflection plate.

[0038] Although different exemplary embodiments of the utility model have been described, it is obvious to those skilled in the art that different changes and modifications can be made, which can achieve one or some of the advantages of the utility model without departing from the spirit and scope of the utility model. For those skilled in the art, other components that perform the same function can be appropriately replaced. It should be understood that the features explained with reference to specific figures can be combined with the features of other figures, even in those cases where this is not explicitly mentioned. In addition, the method of the utility model can be implemented in a software implementation using all appropriate processor instructions or in a hybrid implementation using a combination of hardware logic and software logic to obtain the same result. Such modifications to the scheme according to the utility model are intended to be covered by the appended claims.

Claims

1. A radiation oscillator, characterized in that: The radiation vibrator comprises: A balun component, the balun component being configured to feed the radiating element; a radiation plate, the radiation plate being electrically connected to the balun component; A first metal layer, the first metal layer is disposed on a first side of the radiation plate; and a second metal layer, the second metal layer being disposed on a second side of the radiation plate opposite to the first side, The first projection of the first metal layer relative to the radiation plate and the second projection of the second metal layer relative to the radiation plate at least partially overlap.

2. The radiation vibrator according to claim 1, characterized in that: Partial overlap of the first metal layer and the second metal layer forms a capacitive filter.

3. The radiation vibrator according to claim 1, characterized in that: The first metal layer includes four radiation arms.

4. The radiation vibrator according to claim 3, characterized in that: The four radiating arms form two polarized radiating arms.

5. The radiation vibrator according to claim 4, characterized in that: Each of the two polarized radiation arms includes two oppositely arranged radiation arms.

6. The radiation vibrator according to claim 4, characterized in that: The two polarized radiation arms are electrically connected to each other.

7. The radiation vibrator according to claim 1, characterized in that: The radiation oscillator further includes at least one parasitic director, and the at least one parasitic director is arranged on a side of the second metal layer away from the balun component.

8. The radiation vibrator according to claim 7, characterized in that: The radiation element includes multiple layers of parasitic directors.

9. The radiation vibrator according to claim 8, characterized in that: The parasitic director is constructed as a closed loop structure.

10. The radiation vibrator according to claim 1, characterized in that: The radiation board and the balun component are constructed as a printed circuit board.

11. A base station antenna, characterized in that: The base station antenna comprises a radiating element according to any one of claims 1 to 10.

12. The base station antenna according to claim 11, characterized in that: The base station antenna comprises: At least one radiating element according to any one of claims 1 to 10, wherein the radiating element is configured as a first frequency band radiating element; at least one second frequency band radiating element, wherein the operating frequency band of the second frequency band radiating element is lower than the operating frequency band of the first frequency band radiating element; and A reflector, wherein the first-band radiating vibrator and the second-band radiating vibrator are installed on the same side of the reflector and the distance between the second-band radiating vibrator and the reflector is greater than the distance between the first-band radiating vibrator and the reflector, And wherein, the filtering frequency band of the capacitive filter formed by the first metal layer and the second metal layer of the first frequency band radiating oscillator matches the working frequency band of the second frequency band radiating oscillator.

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