阅读说明：本技术 多频天线及其移相用切换控制机构 (Multi-frequency antenna and phase-shifting switching control mechanism thereof ) 是由 黄潮生 段红彬 薛锋章 刘培涛 肖飞 洪声锐 于 2021-02-20 设计创作，主要内容包括：本发明提供了一种多频天线及其移相用切换控制机构,该机构包括柱状齿轮、直行机构以及周转机构；直行机构用于控制所述柱状齿轮在其轴向上的多个位置之间切换,以使柱状齿轮在其中两个位置与多个选频移相单元任意之一相连接；周转机构用于控制所述的柱状齿轮周向转动；对于每个被连接的选频移相单元,在第一位置处,所述柱状齿轮连动所述选频移相单元中的从动齿轮直线运行而适于对准多个调相控制件任意之一；在第二位置处,柱状齿轮连动所述从动齿轮而适于控制已对准的调相控制件移相。通过本发明的切换控制机构可实现对多个单元化的选频移相单元的选择性移相控制,实现稳定可控的移相控制。(The invention provides a multifrequency antenna and a switching control mechanism for phase shifting thereof, wherein the mechanism comprises a columnar gear, a straight mechanism and a turnover mechanism; the straight-moving mechanism is used for controlling the cylindrical gear to be switched among a plurality of positions in the axial direction of the cylindrical gear so as to enable the cylindrical gear to be connected with any one of the frequency-selecting phase-shifting units at two positions; the revolving mechanism is used for controlling the cylindrical gear to rotate circumferentially; for each connected frequency-selecting phase-shifting unit, at a first position, the columnar gear is linked with a driven gear in the frequency-selecting phase-shifting unit to run linearly so as to be suitable for aligning any one of a plurality of phase-adjusting control pieces; at the second position, the columnar gear is linked with the driven gear and is suitable for controlling the phase shift of the aligned phase modulation control element. The switching control mechanism can realize selective phase-shifting control of a plurality of unitized frequency-selecting phase-shifting units and realize stable and controllable phase-shifting control.)

1. A phase shift is with switching control mechanism which characterized in that:

the switching control mechanism comprises a columnar gear, a straight-moving mechanism and a turnover mechanism;

the straight-moving mechanism is used for controlling the cylindrical gear to be switched among a plurality of positions in the axial direction of the cylindrical gear so as to enable the cylindrical gear to be connected with any one of the frequency-selecting phase-shifting units at two positions;

the revolving mechanism is used for controlling the cylindrical gear to rotate circumferentially;

for each connected frequency-selecting phase-shifting unit, at the first position of the two positions, the columnar gear is linked with a driven gear in the frequency-selecting phase-shifting unit to run linearly so as to be suitable for aligning any one of a plurality of phase-adjusting control pieces which are arranged linearly; and at the second position, the columnar gear is linked with the driven gear to rotate in the circumferential direction so as to be suitable for controlling the aligned phase modulation control element to implement phase shift.

2. The phase shift switching control mechanism according to claim 1, characterized in that: the straight-moving mechanism is used for controlling a box body which covers the columnar gear to move linearly so as to drive the columnar gear to move linearly along the axial direction, and therefore switching of the columnar gear among a plurality of positions is achieved.

3. The switching control mechanism for phase shift according to claim 2, characterized in that: the straight-moving mechanism comprises a first control part, a box body provided with a columnar gear and a transmission wheel shaft, wherein the box body is provided with straight-row teeth parallel to the axial direction of the columnar gear, the first control part is meshed with one end of the transmission wheel shaft through a gear pair for transmission, and the other end of the transmission wheel shaft is provided with a driven columnar gear meshed with the straight-row teeth.

4. The phase shift switching control mechanism according to claim 1, characterized in that: the turnover mechanism comprises a second control part and a composite gear, the composite gear comprises a large gear meshed with columnar teeth on a cylindrical surface of the columnar gear and a bevel gear formed on one surface of the large gear, and the second control part is also provided with a bevel gear meshed with the bevel gear in the composite gear.

5. The phase shift switching control mechanism according to any one of claims 1 to 4, characterized in that: the two frequency-selecting phase-shifting units are respectively arranged at two axial sides of the columnar gear, when the columnar gear is at the first position, only the first linkage gear of the corresponding frequency-selecting phase-shifting unit is engaged, and the first linkage gear is linked with the driven gear to linearly run so as to realize the alignment; when the columnar gear is located at the second position, the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-shifting unit are simultaneously meshed, and the first linkage gear and the second linkage gear are jointly acted to link the driven gear to circumferentially rotate to implement phase shifting.

6. The phase shift switching control mechanism according to claim 5, characterized in that: the columnar gear on the columnar gear column surface is used for being meshed with the first linkage gear, and the meshing teeth formed in the columnar gear shaft hole are used for being meshed with the second linkage gear.

7. The phase shift switching control mechanism according to claim 5, characterized in that: each frequency-selecting phase-shifting unit comprises a phase-shifting transmission mechanism and a plurality of phase-shifting control pieces which are selectively driven by the phase-shifting transmission mechanism, the phase-shifting transmission mechanism comprises a transmission screw rod erected on a support and a transmission shaft with a polygonal cross section, the driving end of the transmission screw rod is fixedly provided with the first linkage gear, a driven gear which is arranged in a linkage box in a sliding and sleeving manner and is meshed with the driven gear, the driving gear is screwed with the transmission screw rod, and the driving end of the transmission shaft is fixedly provided with the second linkage gear.

8. The phase shift switching control mechanism according to claim 7, characterized in that: each frequency-selecting phase-shifting unit is provided with a plurality of phase-shifting control elements which are divided into two rows which are parallel and staggered side by side on two sides of the axial direction of the transmission screw rod, so that the driven gears are alternatively meshed.

9. The phase shift switching control mechanism according to claim 7, characterized in that: the phase modulation control part is a rack and is used for forming a gear rack transmission mechanism with the driven gear.

10. The phase shift switching control mechanism according to claim 7, characterized in that: in the phase-shifting transmission mechanism, two linkage boxes are arranged, each linkage box is provided with a driving gear and a driven gear in the same structure, and the two linkage boxes realize synchronous linkage through a linkage piece.

11. The phase shift switching control mechanism according to claim 7, characterized in that: the radial dimension of the driven gear is larger than that of the driving gear, and the gear teeth of the driven gear are exposed out of the linkage box.

12. A multi-frequency antenna comprising a plurality of phase shift sections corresponding to a plurality of frequency bands, characterized in that it comprises the switching control mechanism for phase shift according to any one of claims 1 to 11.

Technical Field

The invention relates to the technical field of communication, in particular to a multi-frequency antenna and a phase-shifting switching control mechanism thereof.

Background

With the increasing number of mobile communication terminal users, the demand for network capacity of stations in a mobile cellular network is increasing, and it is required to minimize interference between different stations, even between different sectors of the same station, that is, to maximize network capacity and minimize interference. This is usually achieved by adjusting the downtilt angle of the antenna beam at the station.

In the two ways of adjusting the beam downtilt angle, namely, mechanical downtilt and electronic downtilt, the advantage of electronic downtilt is obvious, and the method is currently a mainstream and future development trend. The control of the electrical downtilt angle mainly includes two major categories, namely an internal control and an external control, wherein the internal control is the mainstream at present and in the future.

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 the motors is not reduced, and the number of the driving circuits in the control module is not reduced as the number of the motors. If the frequency bands of the antenna are increased, the structure of the transmission system is more complex and heavy, which affects the reliability of the multi-frequency antenna.

The applicant has practiced the related art solutions to the above problems, but there is still room for improvement in terms of stable control and simple operation, and particularly, in the case of one control, there is still a large room for improvement in the related structure.

Disclosure of Invention

The first objective of the present invention is to provide a switching control mechanism for phase shift, which facilitates switching control of a plurality of phase shift modules.

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

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention provides a switching control mechanism for phase shift, which comprises:

the switching control mechanism comprises a columnar gear, a straight-moving mechanism and a turnover mechanism;

the straight-moving mechanism is used for controlling the cylindrical gear to be switched among a plurality of positions in the axial direction of the cylindrical gear so as to enable the cylindrical gear to be connected with any one of the frequency-selecting phase-shifting units at two positions;

the revolving mechanism is used for controlling the cylindrical gear to rotate circumferentially;

for each connected frequency-selecting phase-shifting unit, at the first position of the two positions, the columnar gear is linked with a driven gear in the frequency-selecting phase-shifting unit to run linearly so as to be suitable for aligning any one of a plurality of phase-adjusting control pieces which are arranged linearly; and at the second position, the columnar gear is linked with the driven gear to rotate in the circumferential direction so as to be suitable for controlling the aligned phase modulation control element to implement phase shift.

Further, the straight-moving mechanism is used for controlling a box body covering the columnar gear to linearly move so as to drive the columnar gear to linearly move along the axial direction, so that the columnar gear is switched among a plurality of positions.

Further, the straight-moving mechanism comprises a first control part, a box body provided with the columnar gear and a transmission wheel shaft, the box body is provided with straight-row teeth parallel to the axial direction of the columnar gear, the first control part and one end of the transmission wheel shaft are in meshed transmission through a gear pair, and the other end of the transmission wheel shaft is provided with a driven columnar gear meshed with the straight-row teeth.

In some embodiments, the epicyclic mechanism comprises a second control part and a compound gear, the compound gear comprises a gearwheel for meshing with the cylindrical teeth on the cylindrical surface of the cylindrical gear and a bevel gear formed on one side of the gearwheel, and the second control part is also provided with a bevel gear for meshing with the bevel gear in the compound gear.

In a preferred embodiment, the method is characterized in that: the two frequency-selecting phase-shifting units are respectively arranged at two axial sides of the columnar gear, when the columnar gear is at the first position, only the first linkage gear of the corresponding frequency-selecting phase-shifting unit is engaged, and the first linkage gear is linked with the driven gear to linearly run so as to realize the alignment; when the columnar gear is located at the second position, the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-shifting unit are simultaneously meshed, and the first linkage gear and the second linkage gear are jointly acted to link the driven gear to circumferentially rotate to implement phase shifting.

Further, the columnar teeth on the columnar gear column surface are used for being meshed with the first linkage gear, and the meshing teeth formed in the columnar gear shaft hole are used for being meshed with the second linkage gear.

Furthermore, each frequency-selecting phase-shifting unit comprises a phase-shifting transmission mechanism and a plurality of phase-shifting control pieces which are selectively driven by the phase-shifting transmission mechanism, the phase-shifting transmission mechanism comprises a transmission screw rod erected on a support and a transmission shaft with a polygonal cross section, the driving end of the transmission screw rod is fixedly provided with the first linkage gear, a driven gear which is arranged in a linkage box and can be slidably sleeved on the transmission shaft and a driving gear which is meshed with the driven gear and is screwed with the transmission screw rod are arranged in the linkage box, and the driving end of the transmission shaft is fixedly provided with the second linkage gear.

Preferably, each frequency-selecting phase-shifting unit is provided with a plurality of phase-adjusting control elements which are divided into two rows which are parallel and staggered to be arranged on two sides of the axial direction of the transmission screw rod, so that the driven gears can be meshed alternatively.

Furthermore, the phase modulation control part is a rack and is used for forming a gear and rack transmission mechanism with the driven gear.

Preferably, the phase-shifting transmission mechanism is provided with two linkage boxes, each linkage box is provided with a driving gear and a driven gear in the same structure, and the two linkage boxes realize synchronous linkage through a linkage piece.

Preferably, the radial dimension of the driven gear is larger than that of the driving gear, and the gear teeth of the driven gear are exposed out of the linkage box.

In order to achieve another object of the present invention, the present invention provides a multi-frequency antenna, which includes a plurality of phase shift units corresponding to a plurality of frequency bands, and the multi-frequency antenna includes the aforementioned switching control mechanism for phase shift.

The technical scheme provided by the invention has the beneficial effects that:

the phase-shifting switching control mechanism provided by the invention can realize switching between at least two modularized frequency-selecting phase-shifting units by switching and controlling the columnar gear to different positions, and then each frequency-selecting phase-shifting unit can be further connected with the frequency-selecting phase-shifting unit at two positions, wherein one position can realize that a phase-shifting control piece corresponding to one frequency band is selected and aligned in the frequency-selecting phase-shifting unit, the other position can control the aligned phase-shifting control piece to implement phase shifting, and the phase-shifting work of a target phase-shifting control piece is completed by matching the switching control mechanism. The switching control among a plurality of modules and among a plurality of phase modulation control pieces can be realized through simple control by switching the position state of the columnar gear through the switching control mechanism, so that the stable phase shift of the corresponding antenna frequency band signal is controlled.

The invention has relatively simple structure, realizes the unified control of a plurality of frequency-selecting phase-shifting units and a plurality of phase modulation control elements only by two-way transmission, realizes two-way transmission and a plurality of connection positions and states only by sharing one columnar gear, has ingenious combination and stable structure, ensures the stable operation of the control process and effectively controls the improvement cost.

Other additional benefits of the invention will be given in the detailed description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below.

FIG. 1 is a schematic structural diagram of a frequency-selective phase-shifting device comprising a switching control mechanism for phase-shifting according to the present invention;

FIG. 2 is a schematic view of the drive screw configuration of the present invention;

FIG. 3 is a schematic view of the internal structure of the driving gear and the driven gear of the linkage box of the present invention;

FIG. 4 is a schematic view of a cylindrical gear structure according to the present invention;

FIG. 5 is a schematic diagram of an internal structure of a frequency-selective phase-shifting apparatus according to an embodiment of the present invention;

FIG. 6 is an enlarged view of the central portion of FIG. 5;

FIG. 7 is a schematic view of the structure of the case for mounting the cylindrical gear of the present invention;

FIG. 8 is a schematic view of the transmission gear of the present invention;

FIG. 9 is a schematic diagram of a frequency-selective phase-shifting apparatus comprising a switching control mechanism for phase-shifting according to the present invention;

FIG. 10 is a schematic view showing another use state of the frequency-selective phase-shifting apparatus using the switching control mechanism for phase shifting provided by the present invention;

FIG. 11 is a schematic view showing another use state of the frequency-selective phase-shifting apparatus using the switching control mechanism for phase shifting provided by the present invention;

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present 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 a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via 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 for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence relationship of the functions executed by the devices, modules or units.

The frequency-selecting phase-shifting device provided by the phase-shifting switching control mechanism comprises the phase-shifting switching control mechanism 1 and at least two frequency-selecting phase-shifting units 2, wherein each frequency-selecting phase-shifting unit 2 comprises a phase-shifting transmission mechanism 21 and a plurality of phase-shifting control pieces (not shown) which are alternatively transmitted by the phase-shifting transmission mechanism.

Each of the phase shift actuators 21 includes a drive screw 211 mounted on the bracket 3, a drive shaft 212 having a polygonal cross section, and respective interlocking parts provided in the drive screw 211 and the drive shaft 212.

Specifically, referring to fig. 2 and 3, the driving end 2111 of the driving screw 211 is fixedly provided with the first linkage gear 213, and the threaded portion 2110 of the driving screw 211 is provided with a driving gear 217 to sleeve the driving screw 211 in the through hole 2170 of the driving gear 217. The through hole 2170 of the driving gear 217 has a thread structure therein, and forms a screw nut transmission mechanism with the transmission screw 211. When the first linkage gear 213 is rotated, the driving gear 217 can move back and forth along the direction of the driving screw 211 by the driving of the screw nut transmission mechanism.

The transmission shaft 212 is provided with a driven gear 215, the driven gear 215 is sleeved on the transmission shaft 212, and the polygonal cross-sectional shape of the sleeved hole 2150 of the driven gear 215 is matched with the cross-sectional shape of the transmission shaft 212, so that the driven gear 215 can slide along the transmission shaft 212 and can move circumferentially along the transmission shaft 212 in the same direction, referring to fig. 3. The driving end of the transmission shaft 212 is fixedly provided with a second linkage gear 216, and when the second linkage gear 216 is rotated, the driven gear 215 and the second linkage gear 216 rotate in the same direction.

The phase-shifting transmission mechanism 21 further comprises a linkage box 214, referring to fig. 3, a driven gear 215 slidably sleeved on the transmission shaft 212 and a driving gear 217 screwed with the transmission screw 211 are installed inside the linkage box 214, the driven gear 215 and the driving gear 217 are in a mutually engaged state, and the gear of the driven gear 215 is higher than the side surface of the linkage box 214, preferably, the radial dimension of the driven gear 215 is larger than the radial dimension of the driving gear 217, and the gear teeth of the driven gear are exposed out of the linkage box 214, so that the gear teeth of the driven gear are higher than the side surface of the linkage box to be engaged with the phase-adjusting control element. The linkage box 214 can slide linearly along the transmission shaft 212 and the transmission screw 211 along with the driven gear 215 and the driving gear 217, and both the driven gear 215 and the driving gear 217 can move circumferentially in the linkage box 214 under certain actuating states.

The switching control mechanism 1 includes a columnar gear 11, a rectilinear motion mechanism 12, and an epicyclic mechanism 13.

As shown in fig. 4, the cylindrical gear 11 is provided with a shaft hole 110, and a plurality of engaging teeth 111 are respectively disposed at two ends of the shaft hole 110, and are configured to engage with the second interlocking gear 216, so that when the second interlocking gear 216 enters the shaft hole 110 and the plurality of engaging teeth 111 are embedded between the gears of the second interlocking gear 216, the second interlocking gear 216 is circumferentially fixed, so that the second interlocking gear 216 can rotate along with the cylindrical gear 11. The structure of each end of the cylindrical gear 11 is arranged to accommodate the need of a single frequency-selecting phase-shifting unit, and therefore, for a single frequency-selecting phase-shifting unit, the above structure may be arranged only at one end thereof. A limiting structure may be further disposed at a portion of the shaft hole 110, which is in contact with the second interlocking gear 216, to limit the depth of the second interlocking gear 216 entering the shaft hole 110. In this embodiment, the two ends of the shaft hole 110 contact with the second interlocking gear 216, and the two ends of the shaft hole 110 and the non-contact portion of the second interlocking gear 216 are designed to be smaller by narrowing the size of the shaft hole 110, so as to block the second interlocking gear 216 from entering, thereby forming the limiting structure. In other embodiments, a component with a limiting function, such as a stop block, can be arranged to limit the position of the component.

The frequency-selecting phase-shifting device is provided with two frequency-selecting phase-shifting units 2A and 2B provided by the invention, and the two frequency-selecting phase-shifting units are respectively arranged at two sides of a switching control mechanism 1. Referring to fig. 5, two second interlocking gears 216 of two frequency-selecting phase-shifting units 2 are respectively disposed at two ends of the cylindrical gear 11 in the axial direction. The columnar gear 11 is connected with only one of the second interlocking gears 216 at the same time, and is alternatively connected with the two second interlocking gears 216 to realize switching through the control of the straight mechanism 12 of the switching control mechanism 1.

The axial length of the cylindrical gear 11 is such that when one end thereof engages the first interlocking gear 213 of one frequency-selective phase-shift unit 2, the other end thereof is sufficiently disengaged from the first interlocking gear 213 of the other frequency-selective phase-shift unit 2, and naturally also disengaged from the second interlocking gear 216.

Referring to fig. 1, fig. 6 and fig. 7, the straight-moving mechanism 12 is used for controlling a box 123 provided with the cylindrical gear 11 to move linearly so as to drive the cylindrical gear 11 to move between positions meshed with the second interlocking gears 216. The straight-moving mechanism 12 includes a first control portion 121, the box 123 on which the cylindrical gear 11 is mounted, and a transmission gear 122. The box body 123 is provided with a straight row of teeth 1231 parallel to the axial direction of the cylindrical gear 11. Referring to fig. 6 and 8, one end of the transmission gear 122 is provided with a gear pair 1221 for meshing with the gear of the first control part 121, and the other end is provided with a driven gear 1222 for meshing with the straight row of teeth 1231. By rotating the first control part 121, the transmission gear 122 is driven in the same direction, and the driven gear 1222 of the transmission gear 122 is meshed with the straight teeth 1231 of the box body 123, so the transmission gear 122 can drive the box body 123 and the cylindrical gear 11 therein to move linearly, and according to the difference of the moving directions, the cylindrical gear 11 can be respectively connected with the second interlocking gears 216 of the two phase shifting transmission mechanisms 21.

The box 123 and the cylindrical gears 11 installed therein operate between positions where the cylindrical gears 11 are engaged with the respective second interlocking gears 216. In its travel, for each phase shifting transmission 21, the cylindrical gear 11 engages only said first linkage gear 213 in the first position and engages both said first linkage gear 213 and said second linkage gear 216 in the second position.

When the cylindrical gear 11 is at the first position of one of the phase shifting transmission mechanisms 21, referring to fig. 6, the cylindrical gear 11 only engages with the first linking gear 213, and the engaging teeth 111 of the shaft hole 110 of the cylindrical gear 11 do not engage with the second linking gear 216, so that when the cylindrical gear 11 rotates, the second linking gear 216 does not rotate, and thus the transmission shaft 212 fixedly connected with the second linking gear 216 and the driven gear 215 sleeved on the transmission shaft 212 do not rotate. However, since the cylindrical teeth 112 of the cylindrical gear 11 are engaged with the first linkage gear 213 of the phase shift transmission mechanism 21, when the cylindrical gear 11 rotates, the transmission screw 211 fixedly connected to the first linkage gear 213 is driven by the cylindrical gear 11 to rotate. Since the driving gear 217 screwed on the driving screw 211 is engaged with the driven gear 215, and the driving gear 217 cannot rotate even when the driven gear 215 cannot rotate, when the driving screw 211 is driven by the cylindrical gear 11 in the first position, the driving gear 217 drives the linkage box 214 and the driven gear 215 therein to move linearly back and forth along with the driving shaft 212 and the driving screw 211.

As mentioned above, the frequency-selective phase-shifting apparatus of the present invention is used to control the phase-modulating control element (not shown) in each frequency-selective phase-shifting unit to perform phase shifting. In each frequency-selecting phase-shifting unit 2, the phase-shifting control elements are divided into two rows, and are arranged in parallel and in a staggered manner at two sides of the axial direction of the transmission screw, that is, arranged in parallel and in a staggered manner in the range of the axial movement stroke of the linkage box 214 in the frequency-selecting phase-shifting device, and each phase-shifting control element monopolizes one width of the axial movement stroke of the driven gear 215, that is, monopolizes one axial position, so that when the cylindrical gear 11 rotates in the first position, and the driven gear 215 moves axially along the transmission screw 211, the driven gear 215 can only align with one phase-shifting control element at each corresponding axial position. Preferably, the phasing control member may be a rack (not shown) for forming a rack and pinion mechanism with the driven gear 215.

Each phase modulation control element is used for a frequency band signal of the corresponding antenna and is connected with a phase shifting part of the corresponding frequency band signal. One or more phase shifters are used for feeding the signals into corresponding radiation units of the radiation unit array after phase shifting, and the phase shifting of each phase shifter is realized by moving the phase shifting part.

Therefore, after the first connecting gear 213 is rotated to move the driven gear 215 to the axial position corresponding to the corresponding phase modulation control element, the cylindrical gear 11 is rotated in the state that the cylindrical gear 11 is at the second position, and the driven gear 215 outputs linear torque to the phase shift component through the gear-rack transmission mechanism to drive the phase shift component to displace to realize phase shift.

Specifically, referring to fig. 11, when the cylindrical gear 11 is at the second position, the second interlocking gear 216 of one of the phase shift transmission mechanisms 21 is engaged with the engaging tooth 111 of the shaft hole 110 of the cylindrical gear 11, and the first interlocking gear 213 is engaged with the cylindrical tooth 112 of the cylindrical gear 11. When the cylindrical gear 11 rotates, the cylindrical gear 11 drives the second interlocking gear 216 engaged with the shaft hole 110 thereof to rotate in the same direction, and the cylindrical teeth 112 of the cylindrical gear 11 drives the first interlocking gear 213 to move in the opposite direction. Therefore, the transmission shaft 212 and the transmission screw 211 are driven by the second interlocking gear 216 and the first interlocking gear 213 to perform opposite circumferential movements. Since the driven gear 215 is fixed to the transmission shaft 212 and moves in the same direction with the transmission shaft 212, and the driven gear 215 is engaged with the driving gear 217, the driven gear 215 gives the driving gear 217 a tendency to rotate in one direction. In addition, because the driving gear 217 and the transmission screw 211 form a screw nut transmission structure, the transmission screw 211 also gives the driving gear 217 a tendency to drive the driving gear 217 to rotate in the same direction, the force directions of the front and back trends are the same, and the driving gear 217 and the driven gear 215 are controlled by the columnar gear 11 at the same time, so that the driving gear 217 and the driven gear 215 can rotate in a mutually meshed manner, the rotation directions are opposite to each other, but the driving gear 217 and the driven gear can stay at the original axial position to do circumferential motion, and the in-situ rotation. . The radial dimension of the driven gear 215 is larger than that of the driving gear 217, the driving gear 217 is lower than the upper surface of the linkage box 214, the driven gear 215 is higher than the upper surface of the linkage box 214, the phase modulation control part at the axial position and the driven gear 215 which protrudes out of the surface of the linkage box 214 form a gear-rack transmission mechanism, so that the driven gear 215 can rotate in situ at the same axial position to drive the phase modulation control part at the corresponding position to move so as to realize phase shift.

In another embodiment, two of the linkage boxes 214 may be disposed in the same frequency-selecting phase-shifting unit, each linkage box 214 has a driving gear 217 and a driven gear 215 disposed in the same structure, and the two linkage boxes are linked synchronously through a linkage member. The two linkage boxes 214 are spaced at a certain distance, and only one linkage box 214 is aligned with one phase modulation control element at each axial position, so that the purpose of controlling the phase shift of one phase modulation control element at a time is achieved. Meanwhile, because two linkage boxes 214 are arranged in the same frequency-selecting phase-shifting unit, the travel of each transverse movement of the two linkage boxes 214 can be shortened to realize frequency selection, and therefore, the operation time required by frequency selection can be shortened.

In the phase-shifting transmission mechanism 21, a stop block is arranged on the surface of the driving gear 217 opposite to the first linkage gear 213, and is used for matching with a limit port arranged at the thread starting position of the transmission screw 211 to realize the limit of the screw nut transmission mechanism in the linear stroke direction.

The revolving mechanism 13 of the present invention is used for controlling the cylindrical gear 11 to rotate circumferentially. Which includes a second control portion 131 and a compound gear 132. The compound gear 132 includes a large gear 1321 for engaging with the cylindrical teeth 112 of the cylindrical gear 11 and a bevel gear 1322 formed on one surface of the large gear 1321, and the second control part 131 is also provided with a bevel gear 1310 for engaging with the bevel gear 1322 in the compound gear 132. When the second control part 131 is rotated, the bevel gear of the second control part 131 drives the compound gear 132 to rotate through the bevel gear 1322 of the compound gear 132, and the compound gear 132 drives the cylindrical gear 11 to move reversely through the large gear 1321. Therefore, the rotation direction of the cylindrical gear 11 can be controlled by the second control portion 131. The cylindrical gear 11 can realize corresponding functions in the states of the first position and the second position.

The basic design principle of the frequency-selective phase-shifting unit is further illustrated by an operating embodiment of the frequency-selective phase-shifting apparatus of the present invention.

Setting a state of the frequency-selecting phase-shifting device as an initial state, if the linkage box 214 is located at the initial position of the sliding range, the columnar gear 11 is located at a first position of one of the frequency-selecting phase-shifting units. Of course, these starting positions can be designed by the skilled person according to the design habit, and the design of each starting state is a reference point, which is not limited in the present invention.

Firstly, it is determined that the target phase modulation control element is located at the position of the frequency-selective phase-shifting device, for example, the phase modulation control element corresponding to an axial position M at one end of the frequency-selective phase-shifting unit 2A in fig. 9 is the target phase modulation control element of the current operation.

Referring to fig. 6, when the first control part 121 is rotated, the first control part 121 drives the transmission gear 122, and the end of the driven gear 1222 of the transmission gear 122 is engaged with the straight row of teeth 1231 of the box body 123, so that the transmission gear 122 drives the box body 123 through the straight row of teeth 1231, and further drives the cylindrical gear 11 in the box body 123 to move towards the moving direction. In this operation step, the cylindrical gear 11 is moved in the direction of the frequency-selective phase shift unit 2A by rotating the first control portion 121 in the direction of the frequency-selective phase shift unit 2A.

First, the cylindrical gear 11 is moved to the first position at the end of the frequency-selecting phase-shifting unit 2A, and referring to fig. 10, the cylindrical gear 11 is engaged with the first linkage gear 213 to stop rotating the first control part 121. At this time, the second control part 131 starts to rotate, the second control part 131 drives the compound gear 132, the large gear 1321 of the compound gear drives the columnar gear 11 at the same time, the columnar gear 11 drives the first linkage gear 213 engaged therewith, and the first linkage gear 213 drives the transmission screw 211 fixedly connected therewith to rotate in the same direction. Therefore, under the rotation of the driving screw 211, the linkage box 214 and the driving gear 217 and the driven gear 215 inside the linkage box move axially along the driving screw 211 and the driving shaft 212 at the same time, and the movement principle thereof has been described when describing the state of the cylindrical gear 11 at the first position, and will not be described again. When the linkage box 214 moves to the axial position M of the target phase modulation control member, the second control part 131 stops rotating.

Next, the first control part 121 is rotated again, and the cylindrical gear 11 is moved to the second position, as shown in fig. 11, the cylindrical gear 11 is simultaneously engaged with the first transmission gear 213 and the second transmission gear 216, and the rotation of the first control part 121 is stopped.

In the second position, the second control unit 131 is rotated again to stop the interlocking box 214 and the two gears therein at the position M, and the driven gear 215 and the driving gear 217 are rotated at the same position. Therefore, in this state, the driven gear 215 can drive the target phase modulation control element corresponding to the position M to move, and can control the displacement of the movement of the target phase modulation control element, thereby correspondingly completing the phase shift of a signal in a certain frequency band of the antenna controlled by the target phase modulation control element.

After the displacement of the target phase modulation control element is completed, the second control part 131 stops rotating, and the phase shift work corresponding to one target phase modulation control element at this time is completed.

After finishing the phase modulation work, if needing to control other phase modulation control elements to modulate phase, the switching control mechanism controls the state of the first position of the columnar gear 11, selects the positions of other phase modulation control elements, and finishes the phase modulation work by switching to the state of the second position. If the phase modulation control element of another frequency-selecting phase-shifting unit 2B needs to be controlled, the cylindrical gear is moved to one end of the frequency-selecting phase-shifting unit 2B by the switching control mechanism, as shown in fig. 10, the control steps of the cylindrical gear 11 at the first position and the second position are repeated, and the phase shift of the antenna frequency band signals corresponding to the phase modulation control elements can be controlled in such a circulating manner. In addition, a clamping strip 1232 can be further disposed on the side of the box body 123 where the cylindrical gear 11 is installed, and after the switching control mechanism is switched to the frequency-selecting phase-shifting unit at one end that needs phase modulation, the clamping strip 1232 will clamp the first linkage gear 213 of the frequency-selecting phase-shifting unit at the other end, so as to prevent the first linkage gear from being accidentally rotated.

Therefore, the frequency-selecting phase-shifting device provided by the embodiment can realize the switching of the different position states by enabling the cylindrical gear 11 of the straight-moving mechanism 12 to be at different positions of the axial stroke. For example, in the first position state, only the first linkage gear 213 is engaged, in the second position state, the first linkage gear 213 and the second linkage gear 216 are simultaneously engaged, and the second control portion 131 is combined to control the frequency-selecting phase-shifting device to select the target phase-shifting control member in the first position state, and perform phase-shifting in the second position state. Therefore, the purpose that the phase shift of a plurality of phase shift control elements can be controlled by controlling two control parts by using the frequency-selecting phase modulation device is achieved.

The number of the phase modulation control elements can be set according to specific requirements of products, the number of the phase modulation control elements can be expanded, the phase shift of more antenna frequency bands can be controlled, and the phase shift can be reduced so as to adapt to corresponding products.

In other embodiments, the frequency-selecting and phase-shifting device may also only adopt one frequency-selecting and phase-shifting unit of the present invention to work in match with the switching control mechanism, and the specific working principle is the same as that described above, which is not repeated.

The invention also provides a multi-frequency antenna, which comprises the phase-shifting switching control mechanism and a plurality of phase-shifting parts corresponding to a plurality of frequency bands, wherein each phase-shifting part is provided with a corresponding phase-shifting control part in the frequency-selecting phase-shifting device in linkage with the phase-shifting control part.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the scope of the invention as defined by the appended claims. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.