CN212810559U - Electric tuning system and base station antenna - Google Patents

Abstract

The present disclosure relates to an electrical tilt system comprising an actuator, a transmission mechanism and at least one phase shifter, the phase shifter comprising: a phase shift circuit board on which a conductive trace is printed; a slide device having a first toothed segment configured to be driven, wherein the slide device is driven to slide on the phase shift circuit board by a movement of the first toothed segment, wherein the actuator is configured to drive a transmission mechanism which is engaged with the first toothed segment for driving the slide device to slide on the phase shift circuit board. In addition, this disclosure still relates to a base station antenna, base station antenna includes according to this electric tilt system. The base station antenna can improve the stable transmission of the electric tilt system and improve the space utilization rate of the electric tilt system.

Description

Electric tuning system and base station antenna

Technical Field

The present disclosure relates generally to the field of base station antennas, and more particularly, to an electrical tilt system and a base station antenna having the same.

Background

Currently, electrically tunable antennas (RET antennas, the term for the mobile electrical tilt antenna) are widely used as base station antennas in cellular communication systems. Before introducing RET antennas, when it is necessary to adjust the coverage area of a conventional base station antenna, a technician must climb up an antenna tower on which the antenna is mounted and manually adjust the pointing angle of the antenna. Typically, the coverage area of an antenna is adjusted by changing the so-called "downtilt angle" of the antenna, which is the angle in the elevation plane in which the boresight of the antenna beam generated by the antenna points in the direction. The introduction of RET antennas allows cellular operators to electrically adjust the downtilt angle of the antenna beam by sending control signals to the antenna.

The RET antenna also includes a RET system that allows the cellular operator to dynamically adjust the downtilt angle of the antenna beam. RET systems typically include a drive motor, a transmission mechanism and a phase shifter for each array of radiating elements. Many modern base station antennas include multiple arrays of radiating elements, each array typically having an associated drive motor, drive mechanism and phase shifter, which complicates the structural arrangement of the antenna. Therefore, it is an urgent problem to improve the space utilization of the antenna. In addition, the smoothness of the transmission should also be improved in RET systems.

SUMMERY OF THE UTILITY MODEL

It is therefore an object of the present disclosure to provide an electrical tilt system and an associated base station antenna that overcome at least one of the deficiencies of the prior art.

According to a first aspect of the present disclosure, there is provided an electrical tilt system including an actuator, a transmission mechanism, and at least one phase shifter, the phase shifter including: a phase shift circuit board on which a conductive trace is printed; a slide arrangement having a first tooth section configured to be driven. The sliding device is driven to slide on the phase shift circuit board by the movement of the first toothed section, wherein the actuator is configured to drive a transmission mechanism which meshes or engages with the first toothed section for driving the sliding device to slide on the phase shift circuit board.

In some embodiments, the transmission mechanism comprises a slide link configured with a second tooth section, the slide link configured to drive the slide device to slide on the phase-shifting circuit board by means of an engagement between the first tooth section of the slide device and the second tooth section of the slide link.

In some embodiments, the slide device includes a slide supported on the slide support, a slide link configured in a rack shape, and a slide support configured in a sector gear shape, thereby forming a rack-and-pinion transmission between the slide link and the slide support.

In some embodiments, the transmission mechanism includes a lever configured to drive the sliding link.

In some embodiments, the slide link is mounted on the lever.

In some embodiments, the slider link is form-fittingly mounted on the lever.

In some embodiments, the slide link has a joint, and the actuating lever has a mating joint, in which the joint can engage in a form-fitting manner.

In some embodiments, the slide link is formed as an integral part of the joystick.

In some embodiments, the electrical tilt system includes a slide rail, the joystick and the slider link being configured to move along the slide rail.

In some embodiments, the electrical tilt system further comprises a support mounted on the base plate for supporting the slide rail.

In some embodiments, the mount has a through slot through which the lever is configured to extend into the slide rail.

In some embodiments, the electrical tilt system includes a first mount and a second mount spaced apart from the first mount, the slide rail being supported between the first mount and the second mount.

In some embodiments, the joystick is driven by the actuator.

In some embodiments, the electrical tilt system includes a plurality of phase shifters respectively mounted on at least one substrate, and the transmission mechanism is configured to drive each sliding device to slide on a respective phase-shifting circuit board.

In some embodiments, the transmission mechanism comprises one lever configured to drive each slide link for each slide device.

In some embodiments, the electrical tilt system includes a first substrate, a first phase shifter and a second phase shifter mounted on the first substrate, wherein the first phase shifter has a first slide device and the second phase shifter has a second slide device, and a first tooth section of the first slide device and a first tooth section of the second slide device face each other.

In some exemplary embodiments, a gap is provided between the first toothed segment of the first sliding-vane device and the first toothed segment of the second sliding-vane device, into which gap the sliding-vane link can project, and second toothed segments are provided on both sides of the sliding-vane link, respectively, which second toothed segments on both sides of the sliding-vane link mesh with the first toothed segment of the first sliding-vane device and the first toothed segment of the second sliding-vane device, respectively.

In some embodiments, the electrical tilt system includes a first substrate, at least one phase shifter mounted on the first substrate, a second substrate, and at least one phase shifter mounted on the second substrate.

In some embodiments, the first substrate and the second substrate are stacked one on top of the other.

In some embodiments, the transmission mechanism comprises a lever, a first slide link for driving a slide device of the phase shifter on the first substrate, and a second slide link for driving a slide device of the phase shifter on the second substrate, wherein the lever is capable of driving the first slide link and the first slide link is capable of driving the second slide link.

In some embodiments, the first slide link is provided with a first engagement configured to engage a first mating engagement on a lever and the first slide link is provided with a second engagement configured to engage a second mating engagement on a second slide link.

In some embodiments, the first substrate is provided with a void through which the second joint can be engaged into a second mating joint.

In some embodiments, the electrical tilt system includes a first slide rail along which the operating lever and the first slide link are movable and which is supported on a mount mounted on the first substrate, and a second slide rail along which the second slide link is movable and which is supported on a mount mounted on the second substrate.

In some embodiments, the first substrate and the second substrate are horizontally disposed.

In some embodiments, the transmission mechanism comprises a lever, a first slide link for driving a slide device of the phase shifter on the first substrate, and a second slide link for driving a slide device of the phase shifter on the second substrate, wherein the lever is capable of driving the first and second slide links.

In some embodiments, the first slide link is provided with a first engagement portion configured to engage a first mating engagement portion on the lever, and the second slide link is provided with a second engagement portion configured to engage a second mating engagement portion on the lever.

In some embodiments, the engagement portion is configured as a projection and the mating engagement portion is configured as a groove; or the engagement portion is configured as a recess and the mating engagement portion is configured as a projection.

In some embodiments, the circular arc profile of the sector gear segment extends following a circular arc trajectory of the conductive trace.

In some embodiments, the slide device is rotatably mounted on the phase-shifting circuit board by means of a pivot shaft.

In some embodiments, the slider is configured as a slider circuit board on which are printed first coupling portions coupled to the input ports of the phase shift circuit board and second coupling portions coupled to the respective conductive traces.

In some embodiments, the phase shifting circuit board comprises:

an input port configured to receive a radio frequency signal;

a first output port and a second output port each configured to output a respective phase-shifted sub-component of the radio frequency signal;

a first conductive trace extending in a first direction, the first conductive trace coupled to a first output port and a second output port; and

the slider device is configured to couple the input port to the first conductive trace and is slidable relative to the first conductive trace in a first direction.

According to a second aspect of the present disclosure, there is provided a base station antenna comprising an electrical tilt system according to any one of the embodiments of the present disclosure.

Drawings

The disclosure is explained in more detail below with the aid of specific embodiments with reference to the drawings. The schematic drawings are briefly described as follows:

FIG. 1a illustrates a front view of a conventional electrical tilt system;

FIG. 1b shows a perspective view of the electrical tilt system of FIG. 1 a;

FIG. 2 illustrates a perspective view of an electrical tilt system according to some embodiments of the present disclosure;

FIG. 3 shows an exploded view of the electrical tilt system of FIG. 2;

FIG. 4a shows a perspective view of a sliding blade link of the electrical tilt system of FIG. 2;

fig. 4b shows a perspective view of a slide rail of the electrical tilt system of fig. 2;

fig. 4c shows a perspective view of the support of the electrical tilt system of fig. 2;

FIG. 4d illustrates a perspective view of a slide support of the electrical tilt system of FIG. 2;

FIG. 5 illustrates a perspective view of an electrical tilt system according to some embodiments of the present disclosure;

FIG. 6 shows an exploded view of the electrical tilt system of FIG. 5;

FIG. 7a shows a perspective view of a first sliding blade link of the electrical tilt system of FIG. 5;

FIG. 7b illustrates a perspective view of a second sliding blade link of the electrical tilt system of FIG. 5.

Detailed Description

The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. It should be understood, however, that the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, the embodiments described below are intended to provide a more complete disclosure of the present disclosure, and to fully convey the scope of the disclosure to those skilled in the art. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

It is understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present disclosure. All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

When an element is referred to herein as being "on," attached to, "" connected to, "coupled to," or "contacting" another element, etc., it can be directly on, attached to, connected to, coupled to or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly attached to," directly connected to, "directly coupled to," or "directly contacting" another element, there are no intervening elements present. In this context, one feature being disposed "adjacent" another feature may refer to one feature having a portion that overlaps or is above or below the adjacent feature.

In this document, spatial relationship terms such as "upper", "lower", "left", "right", "front", "back", "high", "low", and the like may describe one feature's relationship to another feature in the drawings. It will be understood that the terms "spatially relative" encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, features originally described as "below" other features may be described as "above" other features when the device in the figures is inverted. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships may be interpreted accordingly.

Herein, the term "a or B" includes "a and B" and "a or B" rather than exclusively including only "a" or only "B" unless otherwise specifically stated.

In this document, the terms "schematic" or "exemplary" mean "serving as an example, instance, or illustration," and not as a "model" that is to be reproduced accurately. Any implementation exemplarily described herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, the disclosure is not limited by any expressed or implied theory presented in the preceding technical field, background, utility model content, or detailed description.

In this document, the term "substantially" is intended to encompass any minor variations due to design or manufacturing imperfections, tolerances of the devices or components, environmental influences and/or other factors.

In addition, "first," "second," and like terms may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the terms "first," "second," and other such numerical terms referring to structures or elements do not imply a sequence or order unless clearly indicated by the context.

It will be further understood that the terms "comprises/comprising," "includes" and/or "including," when used herein, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, and/or components, and/or groups thereof.

Fig. 1a and 1b are a front view and a perspective view of a conventional electrical tilt system 10, respectively. As shown in fig. 1a and 1b, a conventional electrical tilt system 10 may include a driving motor (not shown), a transmission mechanism, and a phase shifter 3 for an array of radiating elements. When cross-polarized radiating elements are used, two phase shifters 3 may be provided for one array of radiating elements to adjust the phase of the sub-components of the two polarized RF signals. The two phase shifters 3 may be commonly mounted on one substrate 8. The transmission mechanism of the conventional electrical tilt system 10 may include a joystick 1 and a sliding blade link 2 mounted on the joystick 1. The slide rod 2 can have an elongated slot 6, into which slot 6 a pin 5 of the slide device 4 of the phase shifter 3 projects. When the operating rod 1 is driven by a motor, the operating rod 1 drives the slide rod 2, and the slide rod 2 can drive the slide device 4 to slide on a main circuit board 7 (namely, a phase shifting circuit board printed with a conductive trace) of the phase shifter 3, so that the phases of sub-components of the RF signals are changed, and the adjustment of the electrical tilt angle is realized.

Furthermore, the performance of the phase shifter 3 is sensitive to pressure, since upon tilting of the joystick 1 during movement, the contact pressure between the slide means 4 and the main circuit board 7 of the phase shifter 3 increases, which not only damages the phase shifter 3, but also affects the phase shifting performance of the phase shifter 3 and leads to an increase in return loss. Therefore, it is necessary to ensure smooth movement of the lever 1 and the slide link 2. For this, at least two supports 9 may be installed on the base plate to smoothly support the joystick 1.

However, in the conventional electrical tilt system 10, an extra space (as indicated by a box in fig. 1 a) needs to be reserved for the joystick 1. This additional space presents challenges to the spatial design of the base station antenna. In particular, this extra space is undesirable as more and more devices are integrated in the base station antenna. Even in some application scenarios, this extra space is not allowed to be used. Furthermore, the forces applied to the actuation lever 1 and the slide link 2 are not balanced over the entire actuation path, since the greater the pulling force of the slide mechanism 4 is required as the pivoting angle of the slide mechanism 4 increases.

Next, an electrical tilt system 100 according to some embodiments of the present disclosure is described in detail with the aid of fig. 2, 3 and 4a to 4 d. Fig. 2 and 3 are perspective and exploded views, respectively, of an electrical tilt system 100 according to some embodiments of the present disclosure. FIG. 4a shows a perspective view of slide link 20; fig. 4b shows a perspective view of the slide rail 30; fig. 4c shows a perspective view of the support 40; fig. 4d shows a perspective view of the slider device 50.

As shown in fig. 2 and 3, the electrical tilt system 100 may include a drive motor (not shown), a transmission mechanism, and phase shifters for the array of radiating elements. The electrical tilt system 100 may include a plurality of phase shifters. In the current embodiment, the electrical tilt system 100 may include a first phase shifter 61 and a second phase shifter 62 mounted on one substrate 70, which may be used to adjust the phases of the sub-components of the two polarized RF signals. Each phase shifter may include a sliding device 50 and a phase shifting circuit board 51. The slider device 50 is rotatably mounted on the phase shift circuit board 51 by means of a pivot shaft 52. The phase shift circuit board 51 includes an input port, a plurality of output ports, and conductive traces 54 respectively coupled to two of the output ports. The slider device 50 is configured to couple the input port to a respective conductive trace 54 and is slidable relative to the conductive trace 54 to vary the phase change experienced by the sub-components of the RF signal from the input port to the respective output port.

Referring to FIG. 3, the transmission mechanism of the electrical tilt system 100 may include a joystick 21 and a sliding blade link 20. A motor as an actuator may be used to drive the joystick 21. The driven lever 21 can drive the slide link 20, and the slide link 20 further drives the slide device 50 to perform a pivotal motion on the phase-shift circuit board 51. To achieve a more smooth transmission, a rack-and-pinion transmission may be used between the sliding-vane link 20 and the sliding-vane device 50. For this purpose, the slide mechanism 50 can be designed with a toothed segment as the first toothed segment 55, while the slide link 20 can be designed with a toothed rack segment as the second toothed segment 22, so that a more torque-balanced transmission can be achieved by means of a meshing transmission between the first toothed segment 55 and the second toothed segment 22.

Referring to FIG. 4d, the slider device 50 may include a slider (not shown due to being on the opposite side of the slider device 50) and a slider support 56. The slider may be configured as a slider circuit board and has printed thereon a first coupling portion coupled to the input port and a second coupling portion coupled to the corresponding conductive traces 54, respectively. The slide may be supported, e.g., snapped, on a slide support 56 made of dielectric material. In some embodiments, the slide support 56 may be constructed as a plastic piece. In the present embodiment, the slide support 56 may be configured with a sector gear section and cooperate with a rack section of the slide link 20. It will be appreciated that the manner of construction of the slide arrangement 50 may be varied, and in some embodiments the slides themselves may be constructed with toothed sections.

In the embodiment of fig. 3, the electrical tilt system 100 may include a first phase shifter 61 and a second phase shifter 62 mounted on one substrate 70, the first phase shifter 61 having a first sliding device 501, and the second phase shifter 62 having a second sliding device 502. To drive the first and second sliding- vane devices 501, 502 simultaneously, the sliding-vane link 20 may be provided with a second toothed segment 22 on both sides thereof. The first tooth portion 55 of the first sliding-vane device 501 and the first tooth portion 55 of the second sliding-vane device 502 face each other with a gap or passage between them, into which the sliding-vane link 20 can project and engage with the first tooth portions 55 of the two sliding-vane devices 50 by means of its own second tooth portion 22.

With continued reference to FIG. 3, the electrical tilt system 100 may further include a slide rail 30 and a support 40, as shown in FIG. 4c, mounted on the substrate 70 for supporting the slide rail 30. In the current embodiment, the electrical tilt system 100 may include a first mount 40 and a second mount 40 spaced apart from the first mount 40 by a distance. The slide rail 30 may span between the two mounts 40 and provide support for the lever 21 along with the slide link 20. The distance between the two supports 40 or the length of the slide rail 30 can correspond substantially to the full travel of the actuating lever 21. As a result, the actuating lever 21 does not have to be moved out of the abutment 40 or at least less out of the abutment 40, so that the additional space shown in fig. 1a, which is reserved for the stroke of the actuating lever 21, can be avoided or at least reduced.

Referring to fig. 3 and 4c, the mount 40 may be provided with a through-slot 42, and the operating lever 21 may be configured to protrude into the slide rail 30 through the through-slot 42. Referring to fig. 4b, the sliding rail 30 can be designed as two separate profile profiles 32, which profile profiles 32 can be inserted into the receiving groove 44 on the support 40 and remain fixed in the receiving groove 44. The actuating lever 21 with the slide link 20 can be inserted into the slide track 30 formed by the two profile sections 32 and can be displaced smoothly along the slide track 30. In other embodiments, the slide rail 30 may be configured in any other suitable structure, and the shape and size of the slide rail 30 may be adapted according to the design of the operating lever 21 and/or the slide link 20. In other embodiments, the slide rail 30 may be formed as an integrally formed structure. Smooth movement of the operating lever 21 and the slide link 20 is further improved based on reliable and firm support of the slide rail 30, and large fluctuation of contact pressure between the slide device 50 and the main circuit board due to uneven movement of the operating lever 21 is prevented, thereby maintaining the performance of the phase shifter 60 at a good level.

In the current embodiment, the slide link 20 may be mounted to the lever 21 as a separate member. For example, the sliding bar linkage 20 may be mounted on the lever 21 in a form-fitting manner. As shown in fig. 4a, slide link 20 has, in addition to the toothed sections provided on both sides, a projection 23 as an engagement, which projection 23 can engage in a mating engagement, namely a groove 24, on control lever 21. In some embodiments, slide link 20 may be provided with a groove and lever 21 may be provided with a protrusion. In other embodiments, the slide link 20 may be mounted to the lever 21 by any other suitable means of attachment, such as by a material attachment such as welding or by additional fastening means such as rivets, screws. In other embodiments, the slider link 20 may be integrally formed with the lever 21 and configured as part of the lever 21.

Next, an electrical tilt system 100' according to some embodiments of the present disclosure is described in detail with the aid of fig. 5, 6, 7a and 7 b. FIG. 5 shows a perspective view of the electrical tilt system 100'; FIG. 6 shows an exploded view of the electrical tilt system 100'; FIG. 7a is a perspective view of a first sliding-vane link 201 of the electrical tilt system 100'; FIG. 7b is a perspective view of the second sliding link 202 of the electrical tilt system 100'.

In practical operation of a base station antenna, it may be necessary to perform a synchronized phase shifting operation on two or more arrays of radiating elements. In this case, the electrical tilt system 100' may include a plurality of substrates, and there may be at least one phase shifter on each substrate.

As shown in fig. 5 and 6, the electrical tilt system 100' may have a first substrate 701 and a second substrate 702. On the first substrate 701, a first phase shifter 61 and a second phase shifter 62 for two polarizations, for example, are mounted. The first phase shifter 61 has a first slide device 501 and a first phase shift circuit board 511, and the second phase shifter 62 has a second slide device 502 and a second phase shift circuit board 512. In the current embodiment, the first substrate 701 and the second substrate 702 may be stacked on top of each other, thereby improving a compact structure of the antenna. Of course, in other embodiments, the first substrate 701 and the second substrate 702 may be disposed horizontally to each other. For the specific configurations of the phase-shifting circuit boards 511 and 512 and the sliding- plate devices 501 and 502, reference may be made to the descriptions in fig. 2 to 4d, and the descriptions thereof are omitted. The driving mechanism of the electrical tilt system 100' according to this embodiment will be described in detail.

Referring to fig. 6, the transmission mechanism may include a lever 21, a first slide link 201 for driving a first slide device 501, and a second slide link 202 for driving a second slide device 502. A motor as a drive means may be used to drive a (usually only one) lever 21, which lever 21 can drive the first slide link 201. The first slide link 201 further drives the first slide device 501 for pivotal movement on the first phase-shift circuit board 511. In addition, the first slide link 201 can also drive the second slide link 202, such that the second slide link 202 further drives the second slide device 502 to perform a pivotal motion on the second phase-shift circuit board 512. To achieve a smoother transmission, a rack and pinion transmission as already described above may be employed between the first slide link 201 and the first slide device 501 and/or between the second slide link 202 and the second slide device 502.

With continued reference to FIG. 6, the electrical tilt system 100' may further include a first slide rail 601 and a second slide rail 602. The operating lever 21 and the first slide link 201 are movable along the first slide rail 601, and the first slide rail 601 is supported on a support 40 mounted on the first base plate 701. The second slide link 202 is movable along the second slide rail 602, and the second slide rail 202 is supported on a support 40 mounted on a second base plate 702. As a result, the actuating lever 21 does not have to be moved out of the abutment 40 or at least less out of the abutment 40, so that the additional space shown in fig. 1a, which is reserved for the stroke of the actuating lever 21, can be avoided or at least reduced.

Referring to fig. 7a and 7b, the first vane link 201 may be provided with a first protrusion 203 as a first engagement portion, the first protrusion 203 being configured to engage with a groove on the operating lever 21, whereby both form a reliable first mating structure. Furthermore, the first vane link 201 may be further provided with a second protrusion 205 as a second engagement portion, and the second protrusion 205 may be fitted into a groove 206 of the second vane link 202 through a gap portion of the first base plate 701, thereby forming a reliable second fitting structure. The first and second engagement structures enable the actuation of the joystick 21 for the slide links 201, 202 on different substrates 701, 702. It will be appreciated that the first slide link 201 may be mounted to the operating lever 21 by any other suitable means of attachment, for example by material attachment such as welding or by additional fastening means such as rivets, screws. Likewise, the second slide link 202 may be attached to the first slide link 201 by any other suitable attachment means, such as by a material attachment means such as welding or by additional fastening means such as rivets, screws. In other embodiments, the first and second slide links 201 and 202 may be integrally formed with the lever 21.

In some embodiments, the first substrate and the second substrate may be horizontally disposed. In this case, the transmission mechanism may include a (typically only one) lever, a first slide link for driving a slide device of the phase shifter on the first substrate, and a second slide link for driving a slide device of the phase shifter on the second substrate. The joystick can drive a first sliding vane link and a second sliding vane link. The first slide link may be provided with a first engagement portion configured to engage with a first mating engagement portion on the operating lever, and the second slide link is provided with a second engagement portion configured to engage with a second mating engagement portion on the operating lever, thereby achieving reliable transmission. It should be understood that the electrical tilt system 100, 100' according to some embodiments of the present disclosure may drive a plurality of slide links 20 through a motor-driven joystick 21, and the plurality of slide links 20 may correspondingly drive the associated slide devices 50, thereby performing a synchronized phase shifting operation on the respective phase shifters 60.

Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without substantially departing from the spirit and scope of the present disclosure. Accordingly, all changes and modifications are intended to be included within the scope of the present disclosure as defined in the appended claims. The disclosure is defined by the following claims, with equivalents of the claims to be included therein.

Claims (31)

1. An electrical tilt system comprising an actuator, a transmission mechanism, and at least one phase shifter, wherein the phase shifter comprises:

a phase shift circuit board on which a conductive trace is printed; and

a slide device having a first tooth section configured to be driven, wherein the slide device is driven to slide on the phase shift circuit board by a movement of the first tooth section;

wherein the actuator is configured to drive the transmission mechanism, which engages with the first tooth section for driving the sliding device to slide on the phase-shifting circuit board.

2. The electrical tilt system of claim 1, wherein the transmission mechanism includes a sliding-vane link configured with a second tooth section, the sliding-vane link configured to drive the sliding-vane device to slide on the phase-shift circuit board by means of engagement between the first tooth section of the sliding-vane device and the second tooth section of the sliding-vane link.

3. The electrical tilt system of claim 2, wherein the slide assembly includes a slide and a slide support, the slide being supported on the slide support, the slide link being rack-shaped and the slide support being sector-shaped, thereby forming a rack-and-pinion transmission between the slide link and the slide support.

4. The electrical tilt system of claim 2, wherein the transmission mechanism comprises a lever configured to drive the sliding link.

5. The electrical tilt system of claim 4, wherein the sliding blade link is mounted on the operating lever.

6. The electrical tilt system of claim 5, wherein the sliding-vane link is mounted on the operating lever with a form fit.

7. The electrical tilt system according to claim 6, wherein the sliding-vane lever has a joint, wherein the actuating lever has a mating joint, wherein the joint can engage in a form-fitting manner in the mating joint.

8. The electrical tilt system of claim 4, wherein the sliding-vane link is formed as an integral part of a joystick.

9. The electrical tilt system of claim 4, comprising a slide rail, the lever and the slide link being configured to be movable along the slide rail.

10. The electrical tilt system of claim 9, further comprising a support mounted on the base plate for supporting the slide rail.

11. The electrical tilt system of claim 10, wherein the mount has a through slot through which the operating lever is configured to extend into a slide rail.

12. The electrical tilt system of claim 10, comprising a first support and a second support spaced apart from the first support, the slide rail being supported between the first support and the second support.

13. The electrical tilt system of claim 4, wherein the joystick is driven by the actuator.

14. The electrical tilt system of claim 2, comprising a plurality of phase shifters respectively mounted on at least one base plate, the transmission mechanism being configured to drive each slide device to slide on a respective phase-shifting circuit board.

15. The electrical tilt system of claim 14, wherein the transmission mechanism includes one lever configured to drive each slide link for each slide device.

16. The electrical tilt system of claim 14 or 15, comprising a first substrate, a first phase shifter and a second phase shifter mounted on the first substrate, wherein the first phase shifter has a first slide device and the second phase shifter has a second slide device, and the first tooth section of the first slide device and the first tooth section of the second slide device face each other.

17. The electrical tilt system according to claim 16, wherein a gap is provided between the first toothed segment of the first slide device and the first toothed segment of the second slide device, into which gap a slide rod can be inserted, and wherein second toothed segments are provided on both sides of the slide rod, respectively, the second toothed segments on both sides of the slide rod being in mesh with the first toothed segment of the first slide device and the first toothed segment of the second slide device, respectively.

18. The electrical tilt system of claim 14, comprising a first substrate, at least one phase shifter mounted on the first substrate, a second substrate, and at least one phase shifter mounted on the second substrate.

19. The electrical tilt system of claim 18, wherein the first substrate and the second substrate are stacked one on top of the other.

20. The electrical tilt system of claim 18 or 19, wherein the transmission mechanism comprises a lever, a first slide link for driving a slide device of a phase shifter on a first substrate, and a second slide link for driving a slide device of a phase shifter on a second substrate, wherein the lever is capable of driving the first slide link and the first slide link is capable of driving the second slide link.

21. The electrical tilt system of claim 20, wherein the first slide link is provided with a first engagement portion configured to engage a first mating engagement portion on a lever and the first slide link is provided with a second engagement portion configured to engage a second mating engagement portion on a second slide link.

22. The electrical tilt system of claim 21, wherein the first substrate is provided with a void through which the second joint can be scarfed into a second mating joint.

23. The electrical tilt system of claim 20, comprising a first slide rail along which the operating lever and the first sliding link are movable and which is supported on a mount mounted on a first substrate, and a second slide rail along which the second sliding link is movable and which is supported on a mount mounted on a second substrate.

24. The electrical tilt system of claim 18, wherein the first substrate and the second substrate are horizontally disposed.

25. The electrical tilt system of claim 24, wherein the transmission mechanism comprises a lever, a first slide link for driving a slide device of the phase shifter on the first substrate, and a second slide link for driving a slide device of the phase shifter on the second substrate, wherein the lever is capable of driving the first and second slide links.

26. The electrical tilt system of claim 25, wherein the first sliding link is provided with a first engagement portion configured to engage a first mating engagement portion on the operating lever, and the second sliding link is provided with a second engagement portion configured to engage a second mating engagement portion on the operating lever.

27. The electrical tilt system according to claim 7, wherein the engagement portion is configured as a projection and the mating engagement portion is configured as a recess; or the engagement portion is configured as a recess and the mating engagement portion is configured as a projection.

28. The electrical tilt system of claim 3, wherein the slider is configured as a slider circuit board on which are printed a first coupling portion coupled to the input port of the phase shifting circuit board and a second coupling portion coupled to the corresponding conductive trace.

29. The electrical tilt system of claim 1, wherein the slide assembly is rotatably mounted on the phase shifting circuit board by means of a pivot shaft.

30. The electrical tilt system of claim 28, wherein the phase shifting circuit board comprises:

an input port configured to receive a radio frequency signal;

a first output port and a second output port each configured to output a respective phase-shifted sub-component of the radio frequency signal;

a first conductive trace extending in a first direction, the first conductive trace coupled to a first output port and a second output port; and

the slider device is configured to couple the input port to the first conductive trace and is slidable relative to the first conductive trace in a first direction.

31. Base station antenna, characterized in that it comprises an electrical tilt system according to one of claims 1 to 30.

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