WO2022142535A1 - Multiband antenna and switching control mechanism for phase modulation thereof - Google Patents

Abstract

The present invention provides a multiband antenna and a switching control mechanism for phase modulation thereof. The mechanism comprises an output gear, a linear running mechanism, and a circumferential rotating mechanism; the linear running mechanism is used for controlling the output gear to be switched among a plurality of positions in the axial direction of the output gear, so that the output gear is connected to any one of a plurality of frequency selection and phase modulation units at two of the plurality of positions; the circumferential rotating mechanism is used for controlling the output gear to rotate circumferentially; for each frequency selection and phase modulation unit, at a first position, the output gear is linked with a transmission nut in the frequency selection and phase modulation unit to run linearly and suitable for using an outer gear thereof to align with any one of a plurality of phase modulation control members; and at a second position, the output gear is linked with the transmission nut to rotate circumferentially and suitable for using the outer gear thereof to control phase shift of the aligned phase modulation control member. The switching control mechanism for phase shift in the present invention can implement selective phase shift control of a plurality of unitized frequency selection and phase modulation units, thereby achieving stable and controllable phase shift control.

Description

Multi-frequency antenna and its switching control mechanism for phase modulation technical field

The present invention relates to the technical field of communications, and in particular, to a multi-frequency antenna and a switching control mechanism for phase modulation thereof.

Background technique

With the continuous increase of the number of mobile communication terminal users, the demand for the network capacity of the sites in the mobile cellular network is increasing, and the interference between different sites and even between different sectors of the same site is required to be minimized. Maximize capacity and minimize interference. To achieve this purpose, it is usually achieved by adjusting the downtilt angle of the antenna beam on the station.

Among the two methods of adjusting the beam downtilt angle, mechanical downtilt and electronic downtilt, the electronic downtilt has obvious advantages and is the current mainstream and future development trend. The control of electric downtilt is mainly divided into two categories: built-in and external, among which built-in control is the current and future mainstream.

However, the motors used to drive the phase shifters in the conventional transmission device still correspond to the transmission mechanisms of the phase shifters one-to-one, the number of motors is not reduced, and the number of driving circuits in the control module is not reduced as much as the number of motors. If the frequency band of the antenna continues to increase, the structure of the drive system will be more complicated and bulky, which will affect the reliability of the multi-frequency antenna.

The applicant has practiced related technical solutions for the above problems, but there is still room for improvement in terms of stable control and simple operation.

SUMMARY OF THE INVENTION

The first objective of the present invention is to provide a switching control unit for phase modulation which is convenient for switching and controlling a plurality of phase shifting modules.

Another object of the present invention is to provide a multi-frequency antenna.

To achieve the above purpose, the present invention provides the following technical solutions:

The present invention provides a switching control mechanism for phase modulation, wherein:

The switching control mechanism includes an output gear, a straight travel mechanism and an epicyclic mechanism;

The straight travel mechanism is used to control the output gear to switch between multiple positions on its axial direction, so that the output gear is connected with any one of the multiple frequency selection and phase modulation units at two positions;

The epicyclic mechanism is used to control the circumferential rotation of the output gear;

Wherein, for each connected frequency selection and phase modulation unit, at the first position of the two positions, the output gear drives linearly with the transmission nut in the frequency selection and phase modulation unit and is suitable for its The external gear is aligned with any one of a plurality of phasing control elements arranged in a straight line; at the second position, the output gear rotates circumferentially in conjunction with the transmission nut and is adapted to control the aligned phasing with its external gear The controls implement phase shifting.

Further, the straight travel mechanism is used to control a box housing the output gear to run linearly, so as to drive the output gear to run linearly in the axial direction, so as to realize the switching of the output gear between multiple positions.

Further, the straight travel mechanism includes a circumferentially rotatable first control part, a passive screw rod, an active nut, the box body on which the output gear is installed, and a sliding rod for supporting the sliding of the box body. The end is provided with a bevel gear, which is meshed and connected with the bevel gear formed on the active nut. The active nut is screwed with the passive screw, and the passive screw is fixed with the box, so as to be relatively fixed by the active screw. When the nut is rotated and driven, the linkage output gear slides on the sliding rod along with the box body.

Further, the epicyclic mechanism includes a circumferentially rotatable second control portion and a transmission shaft, and the end of the second control portion is provided with a bevel gear, which is meshed with the bevel gear at one end of the transmission shaft. There is a transmission part with a polygonal cross section, the end of the transmission part passes through the shaft hole on the output gear that matches the cross-sectional shape, and is coaxially arranged with the passive screw of the straight travel mechanism, so as to be driven by the circumferential rotation of the second control part. The torque is transmitted to the output gear through the transmission shaft for circumferential rotation.

Further, an accommodation cavity is provided at the opposite end of the driven screw shaft to allow the output gear to accommodate the transmission portion of the transmission shaft when the output gear slides.

In some embodiments, the number of the frequency selection and phase modulation units is two, which are respectively placed on both sides of the output gear in the axial direction. When the output gear is in the first position, only the corresponding frequency selection unit is engaged. The first interlocking gear of the phasing unit, through which the first interlocking gear drives the drive nut to run in a straight line to achieve the alignment with its external gear; when the output gear is in the second position At the same time, the first interlocking gear and the second interlocking gear of the corresponding frequency-selective and phase-modulating unit are meshed, so that they work together to drive the transmission nut to rotate circumferentially to implement phase shifting with its external gear.

Further, in each of the frequency selection and phase modulation units, the first interlocking gear and the second interlocking gear are coaxially arranged side by side, and have the same specification of meshing teeth.

In some embodiments, the frequency selection and phase modulation unit includes a phase shift transmission mechanism and a plurality of phase modulation control elements, each phase modulation control element is used to control the signal corresponding to a frequency band in the antenna to implement phase modulation;

The phase-shifting transmission mechanism includes a bracket, a screw-nut transmission mechanism and a guide mechanism;

The screw nut transmission mechanism includes a first interlocking gear, a guide sliding rod, a driving screw and a driving nut screwed with each other, the first interlocking gear is fixedly sleeved on one end of the driving screw, and the driving screw and the guiding sliding rod are connected to each other. It is supported on the bracket in parallel, and the transmission nut is installed in a box body pivoted on the guide sliding rod;

The guide mechanism includes a plurality of guide rods, a shaft sleeve and a second interlocking gear, each guide rod is circumferentially distributed, and two ends of the guide rods are respectively connected with the shaft sleeves, and the second interlocking gear is sleeved on one of the shaft sleeves;

The guide mechanism is sleeved on the transmission screw with its shaft sleeve, so that the second interlocking gear and the first interlocking gear are arranged side by side, and each guide rod of the guiding mechanism correspondingly passes through a plurality of passages on the transmission nut hole setting;

An outer gear is formed on the outer periphery of the transmission nut, which is used for engaging with any phase modulation control element.

Further, the first interlocking gear receives the rotational torque of the output gear to drive the drive screw to rotate in the circumferential direction, and accordingly drives the drive nut to perform linear motion along the guide rod and the sliding rod.

Further, the first interlocking gear and the second interlocking gear simultaneously receive the same rotational torque of the output gear to rotate synchronously, and correspondingly drive the external gear on the transmission nut to perform circumferential rotation.

Further, the plurality of phase modulation control members are divided into two rows, and are arranged on both sides in the axial direction of the drive screw in a parallel and phase-staggered manner.

Further, the phase modulation control member is a rack, which is used to form a rack-and-pinion transmission mechanism with the external gear.

Further, the cross section of the guide rod of the guide mechanism is trapezoidal.

The present invention also provides a multi-frequency antenna, which includes a plurality of phase shifting components corresponding to a plurality of frequency bands, and includes the aforementioned switching control unit for phase modulation.

The beneficial effects brought by the technical scheme provided by the invention are:

The switching control unit for phase modulation provided by the present invention can switch between at least two modular frequency selection and phase modulation units by switching and controlling its output gear to switch to different positions. The phase unit can be further connected to it at two positions, one of which can be used to select and align the phase modulation control element corresponding to one frequency band in the frequency selection and phase modulation unit, and the other position can control the phase modulation that has been aligned. The control element implements phase shifting, and the phase shifting work of the target phase modulation control element is completed by the cooperation of the switching control mechanism. By switching the position state of the output gear by the switching control mechanism, the switching control between multiple modules and between multiple phase modulation control components can be realized through simple control, so as to control the stable phase shift of the corresponding antenna frequency band signal .

The structure of the present invention is relatively simple, and the unified control of multiple frequency selection and phase modulation units and multiple phase modulation control components can be realized by only two-way transmission. It can be realized, the combination is ingenious, and the structure is stable, which not only ensures the stable operation of the control process, but also effectively controls the improvement cost.

Other additional beneficial effects of the present invention will be given in the detailed description.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention.

Fig. 1 is the structural schematic diagram of the frequency selective phase modulation device applying the phase modulation switching control mechanism of the present invention;

2 is a schematic diagram of the internal structure of the frequency selective phase modulation device of the present invention;

Fig. 3 is a partial enlarged view of the central part of Fig. 2, mainly showing its transmission structure relationship;

4 is a schematic structural diagram of the drive screw of the frequency selection and phase modulation unit of the present invention;

5 is a schematic structural diagram of the first interlocking gear of the frequency selection and phase modulation unit of the present invention;

6 is a schematic structural diagram of the drive nut of the frequency selection and phase modulation unit of the present invention;

7 is a schematic diagram of the connection structure between the guide rod of the frequency selection and phase modulation unit of the present invention and a single bushing;

8 is a schematic structural diagram of the first interlocking gear of the frequency selection and phase modulation unit of the present invention;

9 is a schematic diagram of the assembly structure of the phase-shifting transmission mechanism of the present invention;

10 is a schematic structural diagram of a phase modulation control member of the present invention;

11 is a schematic structural diagram of the active nut of the switching control mechanism of the present invention;

12 is a schematic diagram of the assembly structure of the passive screw and the second box body of the switching control mechanism of the present invention;

13 is a schematic structural diagram of the transmission shaft of the switching control mechanism of the present invention;

14 is a schematic diagram of the output gear structure of the switching control mechanism of the present invention;

15 is a schematic diagram of a partial internal structure of the frequency selective phase modulation device of the present invention in one of the use states;

Fig. 16 is a partial enlarged view of the central part in Fig. 15;

17 is a schematic diagram of a fixed structure of a phase modulation control member of an embodiment of the frequency selective phase modulation device of the present invention;

18 is a structural diagram of a fixing member used for fixing a phase modulation control member of the frequency selective phase modulation device of the present invention;

19 is a schematic structural diagram of the first box body used for assembling the drive nut in the frequency selection and phase modulation device of the present invention;

FIG. 20 is a schematic diagram of the internal structure of the frequency selective phase modulation device in another use state of the present invention.

Detailed ways

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for the purpose of A more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only used for exemplary purposes, and are not used to limit the protection scope of the present invention.

As used herein, the term "including" and variations thereof are open-ended inclusions, ie, "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below.

It should be noted that concepts such as "first" and "second" mentioned in the present invention are only used to distinguish devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units. Units are not intended to limit the order or interdependence of the functions performed by these devices, modules or units.

A frequency selection and phase modulation device constructed by adopting the switching control mechanism for phase modulation provided by the present invention, as shown in Figures 1 and 2, includes a switching control mechanism A and at least two frequency selection and phase modulation units B, each frequency selection The phase modulation unit B includes a phase shift transmission mechanism 1 and a plurality of phase modulation controls 2 .

The phase-shifting transmission mechanism 1 includes a bracket 10 , a screw-nut transmission mechanism 11 and a guide mechanism 12 ;

Referring to FIG. 3 , the screw-nut transmission mechanism 11 includes a first interlocking gear 111 , a guide sliding rod 112 , a driving screw 113 and a driving nut 114 screwed to each other, and the first interlocking gear 111 is fixedly sleeved on the driving screw 113 At one end, the drive screw 113 and the guide slide bar 112 are supported on the bracket 10 in parallel. The drive nut 114 is installed in a first box body 115 pivoted on the guide slide bar 112 .

As shown in FIG. 4 , the drive screw 113 includes a fixed head 1130 , a threaded portion 1132 on which the drive nut 114 runs, and a smooth portion 1131 between the fixed head 1130 and the threaded portion 1132 .

Referring to FIG. 5 , the first interlocking gear 111 includes an installation through hole 1110 matching the shape of the fixed head 1130 of the drive screw 113 , so that the two can rotate in the same direction after being installed and fixed. In this embodiment, the mounting through hole 1110 is a hexagonal through hole.

As shown in FIG. 6 , the transmission nut 114 includes a nut hole 1140 formed in the middle, an external gear 1141 formed on the outer circumference thereof, and a through hole 1142 provided between the nut hole 1140 and the external gear 1141 .

The drive nut 114 sets the drive screw 113 in the nut hole 1140 , and the nut hole 1140 and the threaded portion 1132 of the drive screw 113 constitute a screw-nut drive mechanism. When the external rotational torque drives the first interlocking gear 111, the drive screw 113 rotates synchronously in the same direction, thereby driving the drive nut 114 and the first box body 115 installed therein. Under the condition that the guide sliding rod 112 is limited in direction, it moves back and forth linearly along the driving screw 113 and the guide sliding rod 112 .

A stopper block 1143 is provided on the side of the transmission nut 114 opposite to the first interlocking gear 111 for cooperating with a limit opening (not shown) provided at the thread starting position of the transmission screw 113 to realize the screw nut The limit of one end of the transmission mechanism in the direction of the linear stroke can be similarly limited at the other end of the linear stroke in various forms, which will not be repeated.

As shown in FIG. 7 and FIG. 8 , the guide mechanism 12 includes a plurality of guide rods 121 , bushings 122 and a second interlocking gear 123 . The two ends of the guide rods 121 are respectively provided with bushings 122 to guide the guide rods 121 . The rod 121 is fixed between the two bushings 122 . The end of the shaft sleeve 122 at the same end as the fixed head 1130 of the drive screw 112 is provided with a connecting end 1221 that is fixedly connected to the second link gear 123 , the shape of which is the same as the shape of the sleeve hole 1230 of the second link gear 123 Matching, so as to sleeve and fix the second link gear 123 on the shaft sleeve 122 . When the second interlocking gear 123 is rotated, the shaft sleeve 122 and the guide rod 121 also rotate with the second interlocking gear 123 . The shaft sleeve 122 connected with the second interlocking gear 123 is also provided with a through hole 1222, which is sleeved on the end of the transmission screw 112 where the first interlocking gear 111 is disposed, and makes the first interlocking gear 111 located at the end of the first interlocking gear 111. The outer side and the second interlocking gear 123 are located on the inner side. The outer side of the other shaft sleeve 122 forms a pivot shaft pivoted on the bracket, and the inner side forms a hole groove (not shown) for the same end of the drive screw 113 to pivot therein, so that when necessary, the two connecting shafts can be connected. Driven by the movable gears 111 and 123, respectively or jointly, the drive screw 113 and/or the guide mechanism rotate.

In this embodiment, the number of the guide rods 121 is three, and each guide rod 121 is distributed and locked between the two shaft sleeves 122 in the circumferential direction. The cross-sectional shape of the guide rod 121 matches the shape of the passing hole 1142 in the transmission nut 114 , the number of the guide rod 121 matches the number of the passing hole 1142 , and the passing hole 1142 of the transmission nut 114 Each guide rod 121 is sleeved separately, so the transmission nut 114 can move in the same direction with the rotation of the shaft sleeve 122 .

Preferably, the cross section of the guide rod 121 is trapezoidal. Of course, other cross-sectional shapes can also be provided. In theory, as long as the guide rod 121 is disposed through the transmission nut 114, the linkage between the two can be achieved.

The specific assembly structure of the phase-shifting transmission mechanism 1 is shown in FIG. The smooth portion 1131 of the drive screw 113 is located in the through hole 1222 of the shaft sleeve. The first interlocking gear 111 is installed and fixed at the fixed head 1130 outside the exposed connecting end 1221, and the second interlocking gear 123 is fixedly installed at the connecting end 1221 of the shaft sleeve 122, so that the The second interlocking gear 123 and the first interlocking gear 111 are arranged side by side. In this embodiment, the first interlocking gear 111 and the second interlocking gear 123 have the same radial dimension and meshing tooth specification arrangement , two identical gears can be used. In addition, the three guide rods 121 correspondingly pass through a plurality of through holes 1142 on the transmission nut 114 , so that they are distributed on the periphery of the transmission screw 113 in the circumferential direction. On the basis of this structure, there are the following situations in which different motion control effects are produced on the transmission nut 114 by controlling different interlocking gears:

When the first interlocking gear 111 is rotated alone, and when the first box body 115 encapsulating the drive nut 114 is limited by the guide sliding rod 112, the drive nut 114 is driven by the screw nut drive mechanism along the The guide rod 121 and the transmission screw 113 move axially, and this situation can be used to realize the linear operation of the transmission nut 114, so that it can be positioned to the phase modulation control parts corresponding to different frequency bands;

If the second interlocking gear 123 is rotated alone, the drive nut 114 will rotate with the guide rod 121 in the circumferential direction, but since the first interlocking gear 111 is not rotated, the drive screw 113 does not move, so the drive Theoretically, the nut 114 also moves circumferentially and axially along the guide rod 121 and the drive screw 113 at the same time. However, this situation is not practical in the present invention, and thus does not affect the implementation of the present invention.

When the first interlocking gear 111 and the second interlocking gear 123 are rotated in the same direction at the same time, since the first interlocking gear 111 and the second interlocking gear 123 have the same radial dimension, the drive screw 113 and the second interlocking gear 123 have the same radial dimension. The relative movement direction of the transmission nut 114 is the same direction and the same speed, and although the transmission nut 114 is encapsulated in the first box body 115, it can rotate freely in it. Therefore, in this state, the transmission nut 114 It will stay at the same axial position along with the circumferential movement of the guide rod 121 . The rotational torque output by the in-situ rotation of the drive nut 114 can act on the selected phase modulation control element to implement phase shift control.

In the frequency selection and phase modulation unit B of the present invention, the plurality of phase modulation control members 2 are divided into two opposite rows, and are arranged on both sides of the axial direction of the drive screw 113 in parallel and in a phase-staggered manner. Referring to FIG. 1, through this In this arrangement, each phasing control member 2 exclusively occupies a width of the axial movement stroke of the transmission nut 114, that is, occupies an axial position. Therefore, by rotating the first interlocking gear 111, the transmission nut 114 moves along the axial direction. When the drive screw 113 moves axially, the drive nut 114 can only align with one of the phase modulation control members 2 at each corresponding axial position.

Each of the phase modulation control elements 2 corresponds to a corresponding frequency band signal of the antenna, and is used to connect the phase shifting component of the corresponding frequency band signal. One or more phase shifters are responsible for shifting the phase of the signal into each corresponding radiating element of the radiating element column, and the phase shifting of each phase shifter The movement of the phase parts is realized.

As shown in FIG. 10 , the phase adjustment control member 2 is in the shape of a rack, and the side opposite to the external gear 1141 of the transmission nut 114 is provided with a side-by-side rack 20 that meshes with the external gear 1141 , and is connected to the external gear 1141 of the transmission nut 114 . The external gear 1141 constitutes a rack-and-pinion transmission mechanism. Therefore, after the first interlocking gear 111 is rotated to move the transmission nut 114 to the axial position corresponding to the corresponding phasing control member 2, the external gear 1141 is engaged with the phasing control member 2 corresponding to this position. Then, the first interlocking gear 111 and the second interlocking gear 123 are rotated in the same direction at the same time, the transmission nut 114 rotates in the circumferential direction at the position where it stops, and the external gear 1141 meshes with the side-by-side rack 20 to drive the phase adjustment control. The component 2 moves, thereby outputting a linear torque to the phase-shifting component, driving the phase-shifting component to displace to achieve phase-shifting.

In this embodiment, the state in which the first interlocking gear 111 and the second interlocking tooth 123 of the phase-shifting transmission mechanism 21 rotate synchronously to drive the external gear 1141 to control the phase shifting of a phase-modulating control member 22 is defined as the first state ; Rotate the first interlocking gear 111 alone to control the position of the transmission nut 114, so that the state in which the external gear 1141 meshes with one of the plurality of phase modulation control elements 2 is defined as the second state;

In this embodiment, the frequency selection and phase modulation device has two frequency selection and phase modulation units B1 and B2. The two frequency selection and phase modulation units B1 and B2 are arranged side by side and symmetrically in the same direction, and the first interlocking gears 111 are arranged with each other. The second interlocking gear 123 is disposed at opposite ends of each other, referring to FIG. 2 .

The switching control mechanism A is used to control its output gear 3 to switch states between the first interlocking gear 111 and the second interlocking gear 123 of the two frequency selection and phase modulation units B, and is used to control any one The first interlocking gear 111 and the second interlocking gear 123 of the frequency selection and phase modulation unit B realize state switching.

Referring to FIG. 3 , the switching control mechanism A includes the output gear 3 , a straight travel mechanism 4 and an epicyclic mechanism 5 , and the straight travel mechanism 4 provides a first control portion 41 for controlling the output gear 3 to slide along the axial direction to engage in meshing. The corresponding interlocking gear of any frequency selection and phase modulation unit can switch its different states, and the epicyclic mechanism 5 provides a second control part 51 for controlling the output gear 3 to perform circumferential rotation to drive the corresponding gears in the different states. Rotation of gears 111 and 123 are interlocked.

Specifically, in this embodiment, the straight travel mechanism 4 includes the circumferentially rotatable first control portion 41 , a passive screw 42 , an active nut 44 , a second box 43 on which the output gear 3 is installed, a support The sliding rod 45 of the second box body 43 slides.

As shown in FIG. 11 , a bevel gear 441 is formed at one end of the active nut 44 , and the internal thread structure and the passive screw 42 constitute a nut-screw transmission mechanism.

The end of the first control part 41 is provided with a bevel gear 411 , which is engaged with the bevel gear 441 formed on the driving nut 44 .

The active nut 44 is screwed with the passive screw 42, and the passive screw 42 is fixed with the second box body 43, so that when the relatively fixed active nut 44 is rotated and driven, it drives the inside of the second box body 43. The output gear 3 slides on the sliding rod 45 along with the second box body 43 .

As shown in FIG. 12 , the end of the second box body 43 that is fixedly connected with the passive screw 42 is provided with a accommodating cavity 431 , and the part where the accommodating cavity 431 is connected with the second box body 43 is provided with a perforation 430 , through which a perforation 430 is formed. 430 can enter the accommodating cavity 431 .

Referring to FIG. 3 , the epicyclic mechanism 5 includes the second control portion 51 and a transmission shaft 52 that can rotate in the circumferential direction. The bevel gear 520 is meshed and connected. As shown in FIG. 13 and FIG. 14 , the transmission shaft 52 has a transmission portion 521 with a polygonal cross-section. The driven screw 42 of 4 is coaxially arranged, so that through the circumferential rotation of the second control part 51, the torque is transmitted to the output gear 3 through the transmission shaft 52 for circumferential rotation. At the same time, with the sliding of the second box body 43 and the output gear 3 to accommodate the transmission part 521 , the accommodating cavity 431 of the second box body 43 also gradually accommodates the transmission part 521 on one side, and the transmission part 521 then Passing through the shaft hole 30 and partially entering the accommodating cavity 431, at this time, the distance between the passive screw 42 and the transmission shaft 52 is shortened. In the above process, when the rotation of the second control part 51 is reversely controlled, the operation mechanisms of the transmission shaft 52 and the passive screw 42 are naturally opposite, which will not be repeated.

One end of the shaft hole 30 of the output gear 3 is also provided with a coaxial cylinder 31. When the output gear 3 is assembled with the second box body 43, the accommodating cavity 431 of the second box body 43 is sleeved with the coaxial cylinder 31. The transmission part 521 of the transmission shaft 52 passes through the shaft hole 30 of the output gear. When the second box body 43 and the output gear 3 slide, the transmission part 521 enters the space where the coaxial cylinder 31 and the accommodating cavity 431 are located. In other embodiments, other mechanisms may also be provided to allow the second box body 43 and the output gear 3 to avoid the transmission portion 521 with an appropriate space when sliding, not necessarily the accommodating cavity 431 coaxially provided in this embodiment.

The sliding range of the second box body 43 on the sliding rod 45 is the distance that the output gear 3 in the second box body 43 is suitable for running between the two frequency selection and phase modulation units B1 and B2. Referring to FIG. 2 and FIG. 15 , at one end of the sliding range, the output gear 3 meshes with the two interlocking gears 111 and 123 of the first frequency selection and phase modulation unit B1, and at the other end of the sliding range. The output gear 3 at one end meshes with the two interlocking gears 111 and 123 of the second frequency selection and phase modulation unit B2.

The basic design principle of the frequency selection and phase modulation unit of the present invention is further described below through an operational embodiment of the frequency selection and phase modulation device.

A state of the frequency selection and phase modulation device is set as the initial state. If the output gear 3 and the second box body 43 are at the starting position of their sliding range, the transmission nuts of the two frequency selection and phase modulation units B 114 are all set at the starting position of one end. Of course, these starting positions can be designed by technical personnel according to their design habits, and the design of each starting state is a reference point, which is not limited in the present invention.

2 and 15, after it is determined that the target phase modulation control part 2 is at the position of the frequency selection and phase modulation device, the phase modulation control part 21 at one end of the frequency selection and phase modulation unit B2 in Figure 15 is the target of this operation. Phase modulation controls.

The first control part 41 is driven, and the bevel gear 411 at the end of the first control part 41 meshes with the bevel gear 441 at the end of the driving nut 44, so that when the first control part 41 rotates in a certain direction, the passive gear 411 is driven. The screw 42 is pushed forward, so the second box body 43 and the output gear 3 installed therein are moved from one end of the frequency selection and phase modulation unit B1 to the B2 end of the frequency selection and phase modulation unit. When the position of the output gear 3 reaches the first interlocking gear 111 of the frequency selection and phase modulation unit B2, and only meshes with the first interlocking gear 111, the rotation of the first control part 41 is stopped.

After the output gear 3 has meshed with the first interlocking gear 111, the second control part 51 is rotated, and the bevel gear 510 at the end of the second control part 51 meshes with the bevel gear 520 at the end of the transmission shaft 52, thereby When the second control part 51 rotates in a certain direction, the transmission shaft 52 is driven, and the transmission shaft 52 simultaneously drives the output gear 3 to move in the same direction. At this stage, the phase-shifting transmission mechanism 21 is in the second state, and the first interlocking gear 111 alone receives external rotational torque to drive the transmission screw 113 to rotate in the circumferential direction, correspondingly driving the transmission nut 114 along the guide The rod 121 and the sliding rod 112 perform linear motion until the transmission nut 114 moves to the position where the target phase adjustment control member 21 is located. At this time, the rotation of the second control part 51 is stopped, and the transmission nut 114 is stopped to the target adjustment position. The position of the phase control member 21.

The phase modulation control element corresponding to the position where the transmission nut 114 stays is the selected phase modulation control element. In this embodiment, as shown in FIG. 17 and FIG. 18 , each of the phase modulation control members 2 is fixed and locked by an elastic buckle 40 in the fixing member 4, so that when it is not selected, It cannot be rotated at will. As shown in FIG. 19 , a top member 116 is also provided on the side of the first box body 115 for installing the transmission nut 114 . When the transmission nut 114 moves to the target phase modulation control member 21 , the lifting member 116 lifts the fixing member 4 of the phase modulation control member 21, and the spring buckle 40 of the fixing member 4 releases the target phase modulation control member 21, so that the target phase modulation control member 21 is released. in a movable state. Therefore, the phase modulation control member selected by the transmission nut 114 is in a movable state, and the phase modulation control member that is not selected is locked by the fixing member 4 and cannot be moved.

After selecting the target phase modulation control member 21, turn the first control part 41 again to move the output gear 3 forward until the output gear 3 is simultaneously connected with the first interlocking gear 111 and the second interlocking gear 123. At the same time, as shown in FIG. 20, the rotation of the first control part 41 is stopped.

Next, the second control part 51 is rotated again to drive the output gear 3 to drive the first interlocking gear 111 and the second interlocking gear 123 at the same time. At this stage, the phase shifting transmission mechanism 21 is in the first interlocking gear. In a state, the first interlocking gear 111 and the second interlocking gear 123 receive the same rotational torque and rotate synchronously, and correspondingly drive the external gear 1141 on the transmission nut 114 to perform circumferential rotation, that is, the target phase modulation control element Rotate in place where 21 is. Since the side-by-side racks 20 of the target phasing control member 21 mesh with the external gear 1141 of the drive nut 114, when the drive nut 114 rotates in place, the displacement of the movement of the target phasing control member 2 can be controlled, and the corresponding completion of The phase shift of a certain frequency band signal of the antenna controlled by the target phase modulation control element.

After the displacement of the target phase modulation control member 21 is completed, the rotation of the second control portion 51 is stopped, that is, the phase shift operation corresponding to one target phase modulation control member 21 is completed this time.

After completing the phase modulation work, if it is necessary to control the phase modulation of other phase modulation control components 2, the output gear of the switching control mechanism A is controlled to mesh with the first interlocking gear and the first interlocking gear of the two frequency selection and phase modulation units B at the same time. Switching between the first state of the second interlocking gear and the second state of meshing the first interlocking gear alone, after the transmission nut 114 is moved to the position of the different target phasing control member 2 , the phasing control is controlled. The purpose of phase modulation by control part 2.

Therefore, in the frequency selective phase modulation device provided in this embodiment, the first control part 41 can be provided by designing the straight travel mechanism 4 to control the output gear 3 to slide in the axial direction to mesh with the corresponding interlocking gear of any frequency selective phase modulation unit. to switch its different states. For example, switching between the first state in which the first interlocking gear 111 and the second interlocking gear 123 are simultaneously meshed, and the second state in which the first interlocking gear 111 is individually meshed, is controlled in conjunction with the second control unit 51 . The frequency selective phase modulation device selects the target phase modulation control element in the second state, and performs phase modulation in the first state. Therefore, the purpose of using the frequency selection and phase modulation device to control the phase shift of a plurality of phase modulation control parts by controlling two control parts is achieved.

In this embodiment, one frequency selection and phase modulation unit B is provided with two rows of phase modulation control members 2, and the upper and lower rows of phase modulation control members 2 are arranged in a mutually staggered arrangement, so that the transmission nut 114 is only aligned with one phase modulation control member at one position. pieces. Referring to an embodiment shown in FIG. 1 , a total of twenty phase modulation control elements 2 are provided in the two frequency selection and phase modulation units B. As shown in FIG. This is just one of the embodiments. In other embodiments, the number of the phase modulation control components 2 can be set according to the specific requirements of the product, and the number can be expanded to control the phase shift of more antenna frequency bands, or it can be reduced to meet the needs of Corresponding products are not limited in the present invention.

In other embodiments, the switching control mechanism of the present invention can work with a single frequency selection and phase modulation unit, or can work with three, four or more such frequency selection and phase modulation units. The key lies in the switching control mechanism The linear stroke of the output gear is long enough so that it can engage the interlocking gears of the frequency selection and phase modulation units in different groups at different axial positions. In this way, different embodiments can be flexibly changed by those skilled in the art according to the inventive spirit of the present invention, which will not be repeated.

The present invention also provides a multi-frequency antenna, comprising a switching control mechanism for phase modulation, a plurality of phase-shifting components corresponding to a plurality of frequency bands, and each of the phase-shifting components has a corresponding one of the frequency-selecting and phase-modulating units The phasing controls in are linked with it.

To sum up, the present invention optimizes the relevant mechanism structure required for phase modulation, and can realize the phase modulation control of any frequency band signal in the multi-frequency antenna more stably and simply.

The above description is only a preferred embodiment of the present invention and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover, without departing from the above-mentioned inventive concept, the above-mentioned technical features or Other technical solutions formed by any combination of its equivalent features. For example, a technical solution formed by replacing the above-mentioned features with the technical features invented in the present invention (but not limited to) with similar functions.

Claims (14)

1. A switching control mechanism for phase modulation, characterized in that:

   The switching control mechanism includes an output gear, a straight travel mechanism and an epicyclic mechanism;

   The straight travel mechanism is used to control the output gear to switch between multiple positions on its axial direction, so that the output gear is connected with any one of the multiple frequency selection and phase modulation units at two positions;

   The epicyclic mechanism is used to control the circumferential rotation of the output gear;

   Wherein, for each connected frequency selection and phase modulation unit, at the first position of the two positions, the output gear drives linearly with the transmission nut in the frequency selection and phase modulation unit and is suitable for its The external gear is aligned with any one of a plurality of phasing control elements arranged in a straight line; at the second position, the output gear rotates circumferentially in conjunction with the transmission nut and is adapted to control the aligned phasing with its external gear The controls implement phase shifting.
2. The switching control mechanism for phasing according to claim 1, wherein the straight travel mechanism is used to control a box housing the output gear to run linearly, so as to drive the output gear to run linearly in the axial direction, so as to Switching between multiple positions of the output gear is achieved.
3. The switching control mechanism for phase adjustment according to claim 2, wherein the straight travel mechanism comprises a first control part that can rotate in a circumferential direction, a passive screw rod, a driving nut, and the box body on which the output gear is installed. , a sliding rod supporting the sliding of the box body, the end of the first control part is provided with a bevel gear, which is meshed and connected with the bevel gear formed on the active nut, the active nut and the passive screw are screwed together, and the passive The screw rod is fixed with the box body, so that when the relatively fixed driving nut is rotated and driven, the linkage output gear slides on the sliding rod with the box body.
4. The switching control mechanism for phase adjustment according to claim 3, wherein the epicyclic mechanism comprises a second control part and a transmission shaft that can rotate in the circumferential direction, the end of the second control part is provided with a bevel gear, and The bevel gear at one end of the transmission shaft is meshed and connected, the transmission shaft has a transmission part with a polygonal cross-section, and the end of the transmission part passes through the shaft hole on the output gear that matches the cross-sectional shape, and is connected with the passive drive of the straight-travel mechanism. The screw is coaxially arranged so as to transmit the torque to the output gear through the transmission shaft through the circumferential rotation of the second control part for circumferential rotation.
5. The switching control mechanism for phasing according to claim 3, wherein the passive screw rod is provided with an accommodation cavity at the end opposite to the transmission shaft to allow the output gear to accommodate the transmission shaft when the output gear slides. Transmission Department.
6. The switching control mechanism for phase modulation according to any one of claims 1 to 5, wherein the number of the frequency selection and phase modulation units is two, which are respectively placed on both axial sides of the output gear. When the output gear is in the first position, it only meshes with the first interlocking gear of the corresponding frequency selection and phase modulation unit, and the first interlocking gear drives the transmission nut to run in a straight line to realize its external gear. The alignment; when the output gear is in the second position, it meshes with the first interlocking gear and the second interlocking gear of the corresponding frequency selection and phase modulation unit at the same time, so that they work together to interlock the The transmission nut rotates circumferentially to implement phase shifting with its external gear.
7. The switching control mechanism for phase modulation according to claim 6, wherein in each of the frequency selection and phase modulation units, the first interlocking gear and the second interlocking gear are coaxially arranged side by side, and have The meshing tooth configuration of the same specification.
8. The switching control mechanism for phase modulation according to any one of claims 1 to 5, wherein the frequency selection and phase modulation unit comprises a phase shifting transmission mechanism and a plurality of phase modulation control parts, each phase modulation control The device is used to control the phase modulation of the signal corresponding to a frequency band in the antenna;

   The phase-shifting transmission mechanism includes a bracket, a screw-nut transmission mechanism and a guide mechanism;

   The screw nut transmission mechanism includes a first interlocking gear, a guide sliding rod, a driving screw and a driving nut screwed with each other, the first interlocking gear is fixedly sleeved on one end of the driving screw, and the driving screw and the guiding sliding rod It is supported on the bracket in parallel, and the transmission nut is installed in a box body pivoted on the guide sliding rod;

   The guide mechanism includes a plurality of guide rods, a shaft sleeve and a second interlocking gear, each guide rod is circumferentially distributed, and two ends of the guide rods are respectively connected with the shaft sleeves, and the second interlocking gear is sleeved on one of the shaft sleeves;

   The guide mechanism is sleeved on the transmission screw with its shaft sleeve, so that the second interlocking gear and the first interlocking gear are arranged side by side, and each guide rod of the guiding mechanism correspondingly passes through a plurality of passages on the transmission nut hole setting;

   An outer gear is formed on the outer periphery of the transmission nut, which is used for engaging with any phase modulation control element.
9. The switching control mechanism for phasing according to claim 8, wherein the first interlocking gear receives the rotational torque of the output gear and drives the drive screw to rotate in the circumferential direction, correspondingly drives the drive nut along the guide rod and slide bar to perform linear motion.
10. The switching control mechanism for phase adjustment according to claim 9, wherein the first interlocking gear and the second interlocking gear simultaneously receive the same rotational torque of the output gear to rotate synchronously, and drive the transmission accordingly. The external gear on the nut performs circumferential rotation.
11. The switching control mechanism for phasing according to claim 8, wherein the plurality of phasing control elements are divided into two rows, which are arranged in parallel and staggered on both sides of the axial direction of the drive screw.
12. The switching control mechanism for phase adjustment according to claim 8, wherein the phase adjustment control member is a rack, and is used to form a rack-and-pinion transmission mechanism with the external gear.
13. The switching control mechanism for phase adjustment according to claim 8, wherein the cross section of the guide rod of the guide mechanism is trapezoidal.
14. A multi-frequency antenna, comprising a plurality of phase shifting components corresponding to a plurality of frequency bands, is characterized in that it includes the switching control mechanism for phase modulation as claimed in any one of claims 1 to 13.

Images