CN211126072U

CN211126072U - Antenna, phase-shifting feed device and cavity structure

Info

Publication number: CN211126072U
Application number: CN201922489822.1U
Authority: CN
Inventors: 李明超; 陈礼涛
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-28
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an antenna, a phase-shift feed device and a cavity structure, wherein the cavity structure comprises a medium substrate, a phase-shift circuit layer and a feed circuit layer; the dielectric substrate is provided with a strip-shaped groove, a first grounding layer arranged in the strip-shaped groove and a second grounding layer arranged outside the strip-shaped groove, and the second grounding layer is electrically connected with the first grounding layer; the phase-shifting circuit layer is arranged in the strip-shaped groove and is opposite to the second grounding layer, and the phase-shifting circuit layer and the first grounding layer are arranged in an insulating way; the feed circuit layer is arranged on the outer side wall of the medium base body, the feed circuit layer and the second grounding layer are arranged at intervals, and the feed circuit layer is electrically connected with the phase-shifting circuit layer. The cavity structure can integrate the phase-shift circuit layer and the feed circuit layer without using a cable for feeding. The phase-shifting feed device adopts the cavity structure, so that the volume can be reduced, the assembly parts are simplified, and the weight can be effectively reduced. The antenna can be miniaturized and lightened.

Description

Antenna, phase-shifting feed device and cavity structure

Technical Field

The utility model relates to the field of communication technology, especially, relate to an antenna, move feeder and cavity structures mutually.

Background

With the development of antenna technology, miniaturization is becoming the development trend of antennas. The phase-shifting feed device is a core element of the base station antenna, and the electric signals enter corresponding antenna channels after being subjected to power division and phase-shifting treatment through the phase-shifting feed device to realize signal radiation.

At present, a phase-shifting feed device is generally formed by combining two independent components such as a phase shifter and a feed network board; at least the phase shifter comprises a phase shifter circuit and a shielding cavity thereof. Furthermore, the phase shifter needs to be connected with the feed line of the feed network board through a cable for feeding. Therefore, the phase-shifting feed device has the disadvantages of more parts, more welding spots and long production time, and the phase-shifting feed device has large volume and heavy weight, which is not beneficial to the miniaturization and light weight of the antenna.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for an antenna, a phase-shifting feeding device and a cavity structure. The cavity structure can integrate the phase-shift circuit layer and the feed circuit layer, does not need to utilize a cable for feeding, simplifies the assembly process and is beneficial to improving the production efficiency. The phase-shifting feed device adopts the cavity structure, so that the volume can be reduced, and the weight can be effectively reduced due to the fact that the assembly parts are greatly simplified. The antenna adopts the phase-shifting feed device, and is beneficial to miniaturization and light weight development.

The technical scheme is as follows:

in one aspect, the present application provides a cavity structure, including a dielectric substrate, a phase-shift circuit layer and a feed circuit layer; the dielectric substrate is provided with a strip-shaped groove, a first grounding layer arranged in the strip-shaped groove and a second grounding layer arranged outside the strip-shaped groove, and the second grounding layer is electrically connected with the first grounding layer; the phase-shifting circuit layer is arranged in the strip-shaped groove and is opposite to the second grounding layer, and the phase-shifting circuit layer and the first grounding layer are arranged in an insulating way; the feed circuit layer is arranged on the outer side wall of the medium base body, the feed circuit layer and the second grounding layer are arranged at intervals, and the feed circuit layer is electrically connected with the phase-shifting circuit layer.

When the cavity structure is used, the medium substrate can be obtained by injection molding, three-dimensional printing, machining and the like, then the first grounding layer, the second grounding layer, the phase-shift circuit layer and the feed circuit layer are formed at preset positions on the medium substrate by using processes such as electroplating, chemical plating or L DS (L er-Direct-Structuring, laser Direct forming) and the like, and the second grounding layer is electrically connected with the first grounding layer, and the feed circuit layer is electrically connected with the phase-shift circuit layer.

The technical solution is further explained below:

in one embodiment, a first avoiding slot is formed between the phase shift circuit layer and the first ground layer.

In one embodiment, the dielectric substrate comprises a dielectric body which is convexly arranged in the strip-shaped groove, the phase-shift circuit layer is arranged on the dielectric body, and the dielectric body and the inner side wall of the strip-shaped groove are arranged at intervals to form a channel for the phase-shift dielectric plate to move.

In one embodiment, the dielectric body is integrally formed with the dielectric base.

In one embodiment, the first ground layer is disposed on both the inner side wall and the inner bottom wall of the strip-shaped groove.

In one embodiment, the cavity structure further includes a signal terminal for connecting the phase shift circuit layer, the signal terminal and the first ground layer are disposed at an interval on the inner bottom wall of the strip-shaped slot, and the signal terminal is electrically connected to the feed circuit layer.

In one embodiment, the first ground plane, the second ground plane, the phase shift circuit layer and the feed circuit layer are plated on the dielectric substrate.

In one embodiment, the number of the strip-shaped grooves is at least two, the phase shift circuit layers correspond to the strip-shaped grooves one to one, and the feed circuit layers correspond to the phase shift circuit layers one to one.

In one embodiment, a combiner is disposed between the two feed circuit layers.

In another aspect, the present application further provides a phase-shift feeding apparatus, including the cavity structure in any of the above embodiments.

The phase-shifting feed device adopts the cavity structure, so that a first grounding layer, a second grounding layer, a phase-shifting circuit layer and a feed circuit layer can be directly formed at preset positions on a medium substrate, the second grounding layer is electrically connected with the first grounding layer, and the feed circuit layer is electrically connected with the phase-shifting circuit layer, so that the connection of related feed network circuits is completed. Therefore, the assembling parts can be greatly simplified, and the whole volume and the weight of the phase-shifting feed device are favorably reduced.

The technical solution is further explained below:

in one embodiment, the phase-shift feeding device further includes a shielding plate for closing the strip-shaped slot, and the shielding plate cooperates with the first ground plane and the second ground plane to form a shielding cavity of the phase-shift circuit layer. Therefore, the shielding plate is fixed on the medium substrate, so that the shielding plate is matched with the first grounding layer and the second grounding layer to form a shielding cavity of the phase-shifting circuit layer, and a phase shifter cavity is obtained.

In one embodiment, the shielding plate is made of a conductive material, or the shielding plate is provided with a conductive shielding layer.

On the other hand, the application also provides an antenna, and the phase-shifting feed device in any embodiment is applied.

In combination with the above analysis, the antenna using the phase-shifting feeding device is advantageous for miniaturization and light weight development.

Drawings

FIG. 1 is a schematic diagram of a chamber structure shown in an embodiment;

FIG. 2 is a schematic diagram of a chamber structure shown in an embodiment;

FIG. 3 is an enlarged view of part A shown in FIG. 2;

FIG. 4 is a schematic view of the chamber structure shown in FIG. 2 from another perspective;

FIG. 5 is a schematic structural view of a phase-shift feeding apparatus shown in an embodiment;

FIG. 6 is an exploded view of the phase-shifting feed arrangement shown in one embodiment;

fig. 7 is a schematic structural view of a phase-shift power feeding apparatus shown in an embodiment.

Description of reference numerals:

100. a dielectric substrate; 110. a strip-shaped groove; 120. a first ground plane; 130. a second ground plane; 140. a dielectric body; 150. a first avoidance slot; 160. a ground post; 200. a phase shift circuit layer; 300. a feed circuit layer; 310. a combiner; 400. a signal terminal; 500. a shielding plate; 510. a jack; 600. a shielding cavity; 700. A phase-shifting dielectric plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered to be "electrically connected" to another element, the two elements may be connected by a metal wire or a metal via, and power feeding may be achieved. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The references to "first" and "second" in the present invention do not denote any particular quantity or order, but rather are merely used to distinguish one name from another.

The antenna comprises a radiation unit, a phase shifter for adjusting the downward inclination angle of the antenna and a feed network, wherein the radiation unit is connected with the phase shifter through the feed network, so that the downward inclination angle of the antenna can be adjusted by moving a dielectric plate in the phase shifter.

The traditional phase-shifting feeder device is formed by connecting an independent phase shifter with a feed network circuit board through a cable. Therefore, the phase-shifting feed device has the disadvantages of more parts, more welding spots and long production time, and the phase-shifting feed device has large volume and heavy weight, which is not beneficial to the miniaturization and light weight of the antenna. Based on this, the present application provides an antenna, a phase-shifting feeding device and a cavity structure to solve the foregoing problems.

The structure of the chamber will be described first.

As shown in fig. 1, fig. 2 and fig. 4, in the present embodiment, a cavity structure is provided, which includes a dielectric substrate 100, a phase-shift circuit layer 200 and a feeding circuit layer 300; the dielectric substrate 100 has a strip-shaped groove 110, a first ground plane 120 disposed in the strip-shaped groove 110, and a second ground plane 130 disposed outside the strip-shaped groove 110, wherein the second ground plane 130 is electrically connected to the first ground plane 120; the phase shift circuit layer 200 is disposed in the strip-shaped slot 110 and disposed opposite to the second ground layer 130, and the phase shift circuit layer 200 is disposed in an insulating manner with respect to the first ground layer 120; the feeding circuit layer 300 is disposed on the outer sidewall of the dielectric substrate 100, the feeding circuit layer 300 is disposed at a distance from the second ground layer 130, and the feeding circuit layer 300 is electrically connected to the phase-shift circuit layer 200.

When the cavity structure is used, the dielectric substrate 100 can be obtained by injection molding, three-dimensional printing, machining and the like, then the first ground layer 120, the second ground layer 130, the phase-shift circuit layer 200 and the feed circuit layer 300 are formed at preset positions on the dielectric substrate 100 by using processes such as electroplating, chemical plating or L DS (L er-Direct-Structuring, laser Direct-Structuring) and the like, and the second ground layer 130 is electrically connected with the first ground layer 120, and the feed circuit layer 300 is electrically connected with the phase-shift circuit layer 200.

Furthermore, the installation space of the antenna is smaller and smaller at present, the cavity structure scheme is beneficial to reducing the weight and the size of the antenna, and the corresponding completion or acceleration of the construction of the 4G or/and 5G antenna has great significance. The reduction of weight inevitably brings convenience to antenna installation, reduces the burden on an antenna installation area, and particularly reduces the burden on an iron tower. And the volume is reduced, so that the 4G or/and 5G antenna can be installed in a limited space, the coverage of the 4G or/and 5G antenna in the area is realized, the antennas in other frequency bands do not need to be adjusted or dismantled, and the debugging time is greatly saved.

The "first ground layer 120" and the "second ground layer 130" are conductive layers as long as they can achieve a grounding function, and specifically, the conductive layers may be formed by electroplating, electroless plating, L DS, or the like and integrated with the housing.

The material of the "dielectric substrate 100" may be any insulating material that can meet the requirements, including but not limited to plastic, as long as the dielectric constant meets the requirements of use.

Optionally, the strip-shaped groove 110 penetrates at least one end of the dielectric substrate 100, so as to facilitate the entrance and exit of the phase-shifting dielectric slab 700.

It is understood that the first ground layer 120 and the second ground layer 130 are disposed on different inner and outer sides of the slot 110, and can be flexibly combined according to the position of the phase shift circuit layer 200.

In addition to any of the above embodiments, as shown in fig. 3, in an embodiment, a first avoiding groove 150 is disposed between the phase shift circuit layer 200 and the first ground layer 120. Thus, the phase shift circuit layer 200 and the first ground layer 120 are insulated by the first avoiding groove 150, and the interval between the flat cables can be preset in the manufacturing process, which is easy to implement.

On the basis of any of the above embodiments, as shown in fig. 3 and 4, in an embodiment, the dielectric substrate 100 includes a dielectric body 150 protruding into the stripe-shaped groove 110, and the phase-shift circuit layer 200 is disposed on the dielectric body 150. Thus, the phase shift circuit layer 200 is disposed on the dielectric body 150, and the internal space of the bar-shaped groove 110 can be fully utilized, so that the laying area of the phase shift circuit layer 200 can be increased, and the width of the dielectric substrate 100 can be further reduced.

Further, as shown in fig. 5, in an embodiment, the dielectric body 150 and the inner sidewall of the stripe-shaped groove 110 are disposed at an interval to form a channel for moving the phase-shifting dielectric plate 700. Thus, the dielectric substrate 100 can be used to form a phase shifter, and further, the phase-shifting dielectric plate 700 moves in the channel and cooperates with the phase-shifting circuit layer 200 to adjust the downward tilt angle of the antenna.

Optionally, in one embodiment, the dielectric body 140 is integrally formed with the dielectric substrate 100. Therefore, the assembling procedures can be reduced, and the production efficiency is improved.

Optionally, in an embodiment, the inner side wall and the inner bottom wall of the strip-shaped groove are both provided with a first ground plane. Therefore, the first grounding layer can be directly formed in the strip-shaped groove by electroplating, so that the shielding cavity can be conveniently formed by matching the second grounding layer 130, and the manufacturing difficulty can be reduced.

In addition, the second ground plane 130 only needs to be disposed on the opposite surface of the dielectric body 140 to form a surrounding cavity in cooperation with the first ground plane 110, and at this time, the area of the phase shift circuit layer 200 can be increased, the area of the second ground plane 130 can be reduced, and the feeding circuit layer 300 can have more areas for disposing, which is convenient for integrating more functions.

On the basis of the above embodiments, as shown in fig. 3, in an embodiment, the cavity structure further includes a signal terminal 400 for connecting the phase shift circuit layer 200, the signal terminal 400 and the first ground layer 120 are disposed at an inner bottom wall of the strip-shaped slot 110 at an interval, and the signal terminal 400 is electrically connected to the feeding circuit layer 300. Thus, the signal terminal 400 can be disposed on the inner bottom wall of the strip-shaped groove 110, and is conveniently electrically connected to the feeding circuit layer 300 through a metal wire or a metal via, which is easy to implement and does not need to feed by a cable.

The signal terminals 400 can be understood as an interface for implementing input and output of signals, and the number of the signal terminals 400 can be adjusted correspondingly according to different application scenarios.

In addition to any of the above embodiments, in an embodiment, the first ground layer 120, the second ground layer 130, the phase shift circuit layer 200, and the feeding circuit layer 300 are plated on the dielectric substrate 100. Therefore, the first ground layer 120 and the second ground layer 130 are electrically connected through the metal via, and the phase shift circuit layer 200 and the feed circuit layer 300 are electrically connected through the metal via, so that no welding operation is required, the welding processes are further reduced, and the production efficiency is improved.

On the basis of any of the above embodiments, in an embodiment, there are at least two strip-shaped slots 110, the phase shift circuit layers 200 correspond to the strip-shaped slots 110 one to one, and the feed circuit layers 300 correspond to the phase shift circuit layers 200 one to one. Therefore, a plurality of cavities can be integrated by using the dielectric substrate 100 to form a plurality of groups of phase-shifting feed devices, which is beneficial to further reducing the volume of the antenna feed structure, and two adjacent phase-shifting feed devices share one side wall, which is beneficial to further reducing the weight of the antenna.

At least two phase-shifting power feeders can work in the same frequency band or different frequency bands.

On the basis of the above embodiments, as shown in fig. 7, in one embodiment, a combiner 310 is disposed between two feeding circuit layers 300. Thus, the number of soldering points and cables can be further reduced by using the combiner 310, wherein each signal output end is connected to the feeding network and the radiating unit of the same polarization through the corresponding combiner 310.

The phase-shift feeding device is explained below.

As shown in fig. 5 to 7, in one embodiment, a phase-shift feeding device is provided, which includes the cavity structure in any of the above embodiments.

The phase-shifting power feeding device adopts the cavity structure, so that the first ground layer 120, the second ground layer 130, the phase-shifting circuit layer 200 and the power feeding circuit layer 300 can be directly formed at the preset position on the dielectric substrate 100, and the second ground layer 130 is electrically connected with the first ground layer 120, and the power feeding circuit layer 300 is electrically connected with the first ground layer 120 and the phase-shifting circuit layer 200, so as to complete the connection of the related power feeding network. Therefore, the assembling parts can be greatly simplified, and the whole volume and the weight of the phase-shifting feed device are favorably reduced.

The phase-shifting power feeding apparatus further includes a shielding plate 500, the shielding plate 500 is used to close the strip-shaped slot 110, and the shielding plate 500 cooperates with the first ground plane and the second ground plane 130 to form a shielding cavity 600 of the phase-shifting circuit layer 200. In this way, the shielding plate 500 may be fixed on the dielectric substrate 100, such that the shielding plate 500 cooperates with the first ground layer and the second ground layer 130 to form the shielding cavity 600 of the phase shift circuit layer 200, thereby obtaining a phase shifter cavity.

In addition, the phase shift circuit layer 200 is disposed inside the shielding cavity 600, and the feeding circuit layer 300 is disposed outside the shielding cavity 600, so that the phase shift circuit layer 200 and the feeding circuit layer 300 are not interfered with each other, and the influence on the radiation performance of the radiation unit due to mutual coupling is avoided.

Furthermore, the installation space of the antenna is smaller and smaller at present, the phase-shifting feeding device scheme is beneficial to reducing the weight and the volume of the antenna, and has great significance for correspondingly completing the construction of 4G or/and 5G antennas. The reduction of weight inevitably brings convenience to antenna installation, reduces the burden on an antenna installation area, and particularly reduces the burden on an iron tower. And the volume is reduced, so that the 4G or/and 5G antenna can be installed in a limited space, the coverage of the 4G or/and 5G antenna in the area is realized, the antennas in other frequency bands do not need to be adjusted or dismantled, and the debugging time is greatly saved.

The phase shift circuit layer 200 is matched with the shielding cavity 600 to form a phase shifter module, and the function of a phase shifter can be realized. Therefore, compared with the traditional phase shifter, the cavity structure is more compact, and the cavity structure of the phase shifter is formed by using the dielectric substrate 100 (the weight is greatly reduced compared with the weight of a metal shell) and the ground layer and the shielding plate 500, so that the weight can be obviously reduced, and the function of the phase-shifting feed device can be ensured not to be influenced.

The shielding plate 500 may be fixed to the dielectric substrate 100 by welding, clamping, screwing, or the like.

Specifically, in the present embodiment, as shown in fig. 5 and fig. 6, the side wall of the dielectric substrate 100 is provided with a grounding pillar 160, and the shielding plate 500 is provided with a plug 510 which is in interference fit with the grounding pillar 160. The grounding post 160 and the dielectric substrate 100 are integrally formed, and the grounding post 160 and the insertion hole 510 are matched to realize quick installation and fixation.

On the basis of the above embodiments, in an embodiment, the shielding plate 500 is made of a conductive material, or the shielding plate 500 is provided with a conductive shielding layer. Thus, the shielding plate 500 can be directly manufactured by using a metal plate, or a metal layer can be plated on the substrate, so that the design and assembly are more flexible, and the selection is convenient according to actual needs.

In one embodiment, an antenna is provided, and the phase shift feeding device in any one of the above embodiments is applied.

In addition, it can be understood that, at present, the antenna installation space is smaller and smaller, the weight and the volume of the antenna are reduced, and the construction of the 4G or/and 5G antenna is correspondingly completed. The reduction of weight inevitably brings convenience to antenna installation, reduces the burden on an antenna installation area, and particularly reduces the burden on an iron tower. And the volume is reduced, so that the 4G or/and 5G antenna can be installed in a limited space, the coverage of the 4G or/and 5G antenna in the area is realized, the antennas in other frequency bands do not need to be adjusted or dismantled, and the debugging time is greatly saved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A cavity structure, comprising:

the dielectric substrate is provided with a strip-shaped groove, a first grounding layer arranged in the strip-shaped groove and a second grounding layer arranged outside the strip-shaped groove, and the second grounding layer is electrically connected with the first grounding layer;

the phase-shift circuit layer is arranged in the strip-shaped groove and is opposite to the second grounding layer, and the phase-shift circuit layer and the first grounding layer are arranged in an insulating way; and

the feed circuit layer is arranged on the outer side wall of the medium base body, the feed circuit layer and the second grounding layer are arranged at intervals, and the feed circuit layer is electrically connected with the phase-shifting circuit layer.

2. The cavity structure of claim 1, wherein a first avoidance slot is disposed between the phase shift circuit layer and the first ground layer.

3. The cavity structure of claim 1, wherein the dielectric substrate comprises a dielectric body protruding into the strip-shaped groove, the phase-shift circuit layer is disposed on the dielectric body, and the dielectric body and the inner sidewall of the strip-shaped groove are spaced to form a channel for moving the phase-shift dielectric plate.

4. The cavity structure of claim 3, wherein the dielectric body is integrally formed with the dielectric substrate.

5. The cavity structure of claim 3, wherein the first ground plane is disposed on both the inner sidewall and the inner bottom wall of the stripe-shaped groove.

6. The cavity structure of claim 1, further comprising a signal terminal for connecting the phase shift circuit layer, wherein the signal terminal and the first ground layer are spaced apart from each other and disposed on an inner bottom wall of the strip-shaped slot, and the signal terminal is electrically connected to the feed circuit layer.

7. The cavity structure of claim 1, wherein the first ground plane, the second ground plane, the phase shift circuit layer and the feed circuit layer are plated on the dielectric substrate.

8. The cavity structure according to any one of claims 1 to 7, wherein the number of the strip-shaped slots is at least two, the phase shift circuit layers correspond to the strip-shaped slots one to one, and the feed circuit layers correspond to the phase shift circuit layers one to one.

9. The cavity structure of claim 8, wherein a combiner is disposed between two of the feed circuit layers.

10. A phase-shifting feed arrangement, comprising a cavity structure according to any of claims 1 to 9.

11. The phase-shifting feed apparatus according to claim 10, further comprising a shielding plate for closing the strip-shaped slot, wherein the shielding plate cooperates with the first ground plane and the second ground plane to form a shielding cavity of the phase-shifting circuit layer.

12. The phase-shifting power feeding apparatus according to claim 11, wherein the shielding plate is made of a conductive material, or the shielding plate is provided with a conductive shielding layer.

13. An antenna, characterized in that a phase-shifting feed arrangement according to any of claims 10 to 12 is applied.