CN113540795B - Multi-frequency antenna and phase shift control mechanism thereof - Google Patents
Multi-frequency antenna and phase shift control mechanism thereof Download PDFInfo
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- CN113540795B CN113540795B CN202110793873.2A CN202110793873A CN113540795B CN 113540795 B CN113540795 B CN 113540795B CN 202110793873 A CN202110793873 A CN 202110793873A CN 113540795 B CN113540795 B CN 113540795B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 91
- 230000010363 phase shift Effects 0.000 title claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 169
- 230000007306 turnover Effects 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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Abstract
The invention provides a multi-frequency antenna and a phase shift control mechanism thereof, wherein the mechanism comprises a transmission part, a straight running mechanism and a turnover mechanism; the straight running mechanism is used for controlling the transmission member to switch among a plurality of positions in the axial direction of the transmission member so as to enable the transmission member to be connected with any one of a plurality of frequency-selecting phase-shifting units in two positions; the turnover mechanism is used for controlling the transmission piece to rotate circumferentially; for each connected frequency-selecting phase-shifting unit, at a first position, the transmission member is linked with a driven gear in the frequency-selecting phase-shifting unit to linearly run and is suitable for aligning any one of a plurality of phase-modulating control members; in the second position, the transmission member is adapted to control the phase shift of the aligned phase modulation control member, in conjunction with the driven gear. The switching control mechanism can realize the selective phase shift control of a plurality of unitized frequency-selecting phase shift units and realize the stable and controllable phase shift control.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a multi-frequency antenna and a phase shift control mechanism thereof.
Background
With the increasing number of mobile communication terminal users, the network capacity requirements of stations in a mobile cellular network are increasing, and meanwhile, the interference between different stations and even between different sectors of the same station is required to be minimized, namely, the maximization of the network capacity and the minimization of the interference are realized. This is typically achieved by adjusting the downtilt of the antenna beam at the station.
In two modes of mechanical downtilt and electronic downtilt of adjusting beam downtilt, the electronic downtilt has obvious advantages, and is a current mainstream and a future development trend. The control of the electric downtilt angle is mainly divided into an internal type and an external type, wherein the internal control is the main stream of the current and future.
However, the motors used to drive the phase shifters in the conventional transmission device are still in one-to-one correspondence with the transmission mechanisms of the phase shifters, 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 is further increased, the transmission system structure is more complex and heavy, and the reliability of the multi-frequency antenna is affected.
The applicant has practiced the related technical solutions to the above problems, but there is still room for improvement in stable control and simple operation, especially for the case of more than one control, and the improvement of the related structure is still large.
Disclosure of Invention
The first object of the present invention is to provide a phase shift control mechanism that facilitates switching control of a plurality of phase shift modules.
It is a further object of the present invention to provide a multi-frequency antenna.
In order to meet the aim of the invention, the invention adopts the following technical scheme:
it is a first object of the present invention to provide a phase shift control mechanism,
the switching control mechanism comprises a transmission part, a straight running mechanism and a turnover mechanism;
the straight running mechanism is used for controlling the transmission member to switch among a plurality of positions in the axial direction of the transmission member so that the transmission member is connected with any one of a plurality of frequency-selecting phase-shifting units at two positions;
the turnover mechanism is used for controlling the transmission piece to circumferentially rotate;
wherein, for each connected frequency-selecting phase-shifting unit, at the first position of the two positions, the transmission member is linked with a driven gear in the frequency-selecting phase-shifting unit to linearly operate so as to be suitable for aligning any one of a plurality of phase-modulating control members which are linearly arranged; in the second position, the transmission member is adapted to control the aligned phase modulation control member to perform phase shifting in conjunction with the circumferential rotation of the driven gear.
Further, the transmission piece comprises a linkage shaft, two linkage gears arranged at two ends of the linkage shaft and a rotating gear sleeved at the middle part of the linkage shaft.
Specifically, the straight running mechanism is used for controlling a box body covering the transmission piece to run linearly so as to drive the transmission piece to run linearly along the axial direction, and therefore switching of the transmission piece among a plurality of positions is achieved.
Further, the straight-moving mechanism comprises a first control part, a box body provided with a transmission part and a transmission wheel shaft, wherein the box body is provided with straight-row teeth parallel to the axial direction of the transmission part, 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 column gear meshed with the straight-row teeth.
Specifically, the turnover mechanism comprises a second control part and a compound gear, wherein the compound gear comprises a bevel gear which is used for being meshed with a rotating gear of the transmission part and a large gear which is coaxially formed on the bevel gear, and the second control part is also provided with a gear which is meshed with the large gear in the compound gear.
Further, the number of the frequency-selecting phase-shifting units is two, the frequency-selecting phase-shifting units are respectively arranged on two axial sides of the transmission part, when the transmission part is positioned at the first position, one of the linkage gears of the transmission part only meshes with the first linkage gear of the corresponding frequency-selecting phase-shifting unit, and the driven gear is driven to linearly run through the first linkage gear so as to realize the alignment; when the transmission part is positioned at the second position, one of the linkage gears of the transmission part is simultaneously meshed with the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-shifting unit, so that the first linkage gear and the second linkage gear act together to link the driven gear to circumferentially rotate for phase shifting.
Further, the linkage gear of the transmission piece is used for being meshed with the first linkage gear, and the meshing teeth formed in the shaft hole of the linkage gear are used for being meshed with the second linkage gear.
Further, each frequency-selecting phase-shifting unit comprises a phase-shifting transmission mechanism and a plurality of phase-modulating control pieces driven by the phase-shifting transmission mechanism, the phase-shifting transmission mechanism comprises a transmission screw rod erected on a bracket and a transmission shaft with a polygonal section, the driving end of the transmission screw rod is fixedly provided with the first linkage gear, a driven gear of the transmission shaft and a driving gear meshed with the driven gear and screwed with the transmission screw rod are sleeved in a linkage box in a sliding manner, and the driving end of the transmission shaft is fixedly provided with the second linkage gear.
Specifically, each frequency-selecting phase-shifting unit is provided with a plurality of phase-modulating control members which are divided into two rows and are parallel and staggered to each other and arranged on two sides of the axial direction of the driving screw so that the driven gears are alternatively meshed.
Further, the phase modulation control piece is a rack and is used for forming a gear-rack transmission mechanism with the driven gear.
Furthermore, in the phase shift 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.
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.
A further object of the present invention is to provide a multi-frequency antenna, which includes a plurality of phase shifting components corresponding to a plurality of frequency bands, and the phase shifting control mechanism of the first object is provided.
The technical scheme provided by the invention has the beneficial effects that:
the phase-shifting control mechanism provided by the invention can be switched to different positions by switching the transmission parts, can realize switching between at least two modularized frequency-selecting phase-shifting units, can be further connected with each frequency-selecting phase-shifting unit at two positions, wherein one position can realize the selection and alignment of the phase-modulating control piece corresponding to one frequency band in the frequency-selecting phase-shifting unit, and the other position can control the aligned phase-modulating control piece to implement phase shifting, and can complete the phase shifting work of the target phase-modulating control piece through the cooperation of the switching control mechanism. The position state of the transmission part is switched by the switching control mechanism, and the switching control between a plurality of modules and between a plurality of phase modulation control parts can be realized by simple control, so that the stable phase shift of the corresponding antenna frequency band signals is controlled.
The invention has the advantages of relatively simple structure, realization of unified control of a plurality of frequency-selecting phase-shifting units and a plurality of phase-modulating control pieces by using two paths of transmission, realization of two paths of transmission, a plurality of connection positions and states by sharing one transmission piece, ingenious combination, stable structure and effective control of improvement cost while ensuring stable operation of a control process.
Other additional benefits of the invention will be set forth in the detailed description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments of the present invention will be briefly described below.
FIG. 1 is a schematic diagram of a frequency-selecting phase-shifting device formed by a phase-shifting control mechanism provided by the invention;
FIG. 2 is a schematic view of the structure of the drive screw of the present invention;
FIG. 3 is a schematic view of the internal structure of the driving gear and driven gear of the present invention mounted on the linkage box;
FIG. 4 is a schematic diagram of a driving member according to the present invention;
FIG. 5 is a schematic diagram illustrating an internal structure of a frequency-selective phase-shifting device 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 a box structure with a driving member according to the present invention;
FIG. 8 is a schematic diagram of a transmission gear structure according to the present invention;
FIG. 9 is a schematic diagram of a use state of a frequency-selective phase-shifting device formed by the phase-shifting control mechanism provided by the invention;
FIG. 10 is a schematic diagram of another use state of a frequency-selecting phase-shifting device formed by the phase-shifting control mechanism provided by the invention;
fig. 11 is a schematic diagram of another use state of the frequency-selecting phase-shifting device formed by the phase-shifting control mechanism provided by the invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the invention is susceptible of embodiment in the drawings, it is to 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 to provide a more thorough and complete understanding of the invention. It should be understood that the drawings and embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the present invention.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "coupled" may be either directly or indirectly through intervening components (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. Related definitions of other terms will be given in the description below.
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between devices, modules, or units and not necessarily for defining the order in which such devices, modules, or units perform their functions or are interdependent.
A frequency-selecting phase-shifting device adopting the constitution provided by the phase-shifting control mechanism of the invention, as shown in figure 1, comprises the phase-shifting 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-modulating control members (not shown) driven by the phase-shifting transmission mechanism.
Each phase shift transmission mechanism 21 includes a transmission screw 211 and a transmission shaft 212 having a polygonal cross section, which are mounted on the bracket 3, and respective interlocking members provided in the transmission screw 211 and the transmission shaft 212.
Specifically, referring to fig. 2 and 3, the driving end 2111 of the driving screw 211 is fixedly provided with a first linkage gear 213, and a driving gear 217 is disposed at the threaded portion 2110 of the driving screw 211 to sleeve the driving screw 211 in the through hole 2170 of the driving gear 217. Wherein, 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 make a back and forth linear motion along the direction of the driving screw 211 due to the driving of the screw nut driving mechanism.
The driving shaft 212 is connected with a driven gear 215, the driven gear 215 is sleeved on the driving shaft 212, the polygonal cross section of a sleeved hole 2150 of the driven gear 215 is matched with the cross section of the driving shaft 212, and referring to fig. 3, the driven gear 215 can slide along the driving shaft 212 and also can do the same-direction circumferential motion along with the driving shaft 212. The driving end of the transmission shaft 212 is fixedly provided with a second linkage gear 216, and when the second linkage gear 216 rotates, the driven gear 216 and the second linkage gear 216 rotate in the same direction.
The phase shift transmission mechanism 21 is further provided with 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 on the transmission screw 211 are installed in the linkage box, the driven gear 215 and the driving gear 217 are in a mutually meshed state, 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 greater than the radial dimension of the driving gear 217, and the gear teeth of the driven gear 215 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 so as to be meshed with a phase modulation control member. The linkage box 214 can slide along the driven gear 215 and the driving gear 217 along the transmission shaft 212 and the transmission screw 211, and the driven gear 215 and the driving gear 217 can do circumferential movement in the linkage box 214 under a certain actuation state.
The switching control mechanism 1 comprises a transmission member 11, a straight running mechanism 12 and an turnover mechanism 13.
As shown in fig. 4, the transmission member 11 includes a linkage shaft 114, two linkage gears 112 disposed at two ends of the linkage shaft 114, and a rotation gear 113 sleeved at the middle of the linkage shaft 114. The rotating gear 113 is a bevel gear, the rotating gear 113 is used for driving the linkage gear 112 and the two linkage gears 112 to synchronously rotate in the same direction, and the two linkage gears 112 respectively correspond to at least one frequency-selecting phase-shifting unit 2.
Specifically, an end of the linkage gear 112 facing the corresponding frequency-selecting phase-shifting unit 2 is provided with a shaft hole 110, and a plurality of engaging teeth 111 are disposed in the shaft hole 110 and are used for engaging with the second linkage gear 216 of the corresponding frequency-selecting phase-shifting unit 2. When the second interlocking gear 216 enters the shaft hole 110, the plurality of engaging teeth 111 are embedded between the gears of the second interlocking gear 216, so that the second interlocking gear 216 is circumferentially fixed, and the second interlocking gear 216 can rotate along with the interlocking gear 112 of the transmission member 11. The structure of the linkage gear 112 of the transmission member 11 is set to accommodate the needs of a single frequency-selective phase-shifting unit, and therefore, it is possible to set the above structure only at one end of a single frequency-selective phase-shifting unit. A limiting structure may be further disposed at a portion of the shaft hole 110 contacting the second interlocking gear 216 to limit the depth of the second interlocking gear 216 entering the shaft hole 110. In this embodiment, the contact portion between the shaft hole 110 and the second linking gear 216 has a size matching with that of the contact portion between the shaft hole 110 and the second linking gear 216, and the non-contact portion between the shaft hole 110 and the second linking gear 216 is formed by narrowing the size of the shaft hole 110 and designing the size to be smaller, so as to prevent the second linking gear 216 from entering. In other embodiments, a member with a limiting function such as a blocking piece may be further provided to limit the member.
The frequency-selecting phase-shifting device is provided with two frequency-selecting phase-shifting units 2A and 2B provided by the invention, which are respectively arranged at two sides of the switching control mechanism 1. Referring to fig. 5, two second interlocking gears 216 of the two frequency-selective phase shifting units 2 are respectively disposed at both ends of the transmission member 11 in the axial direction, and the two second interlocking gears 216 respectively correspond to the two interlocking gears 112 of the transmission member. The transmission member 11 is connected to only one of the second interlocking gears 216 at the same time, and is selectively connected to the two second interlocking gears 216 to realize the switching by the control of the straight-moving mechanism 12 of the switching control mechanism 1.
When one of the linking gears 112 of the transmission member is meshed with the first linking gear 213 of one frequency-selective phase shift unit 2, the other linking gear 112 of the transmission member is unhooked from the first linking gear of the other frequency-selective phase shift unit 2.
Referring to fig. 1, 6 and 7, the straight running mechanism 12 is used for controlling a box 123 provided with the transmission member 11 to run straight, so as to drive the transmission member 11 to run between at least two frequency-selecting phase-shifting units. The straight traveling mechanism 12 includes a first control part 121, the box 123 to which the transmission member 11 is attached, and a transmission gear 122. The box 123 is provided with in-line teeth 1231 parallel to the axial direction of the transmission member 11. Referring to fig. 6 and 8, the transmission gear 122 has a gear pair 1221 for meshing with the gear of the first control part 121 at one end and a driven gear 1222 for meshing with the in-line teeth 1231 at the other end. By rotating the first control part 121, the driving gear 122 is driven in the same direction, and the driven gear 1222 of the driving gear 122 is meshed with the in-line teeth 1231 of the box 123, so that the driving gear 122 can drive the box 123 and the driving member 11 therein to do linear motion, and the driving member 11 can be connected with the second linkage gears 216 of the two phase-shifting driving mechanisms 21 according to different motion directions.
The box 123 and the transmission member 11 mounted therein run between the positions where the transmission member 11 meshes with the second interlocking gears 216 of the respective frequency selective phase shifting units. In its travel, the transmission element 11 engages in a first position only said first interlocking gear 213 and in a second position simultaneously said first interlocking gear 213 and second interlocking gear 216, for each phase shift transmission 21.
When the transmission member 11 is at the first position of one of the phase shift transmission mechanisms 21, referring to fig. 6, the transmission member 11 only engages with the first linkage gear 213, and the engagement teeth 111 of the shaft hole 110 of the linkage gear 112 of the transmission member 11 are not engaged with the second linkage gear 216, so that when the transmission member 11 rotates, the second linkage gear 216 does not rotate, and therefore the transmission shaft 212 fixedly connected with the second linkage gear 216 and the driven gear 215 sleeved on the transmission shaft 212 do not rotate. However, since the external teeth 112 of the interlocking gear 112 of the transmission member 11 are engaged with the first interlocking gear 213 of the phase shift transmission mechanism 21, when the transmission member 11 rotates, the transmission screw 211 fixedly connected to the first interlocking gear 213 is driven to rotate by the interlocking gear 112 of the transmission member 11. Since the driving gear 217 screwed on the driving screw 211 is meshed with the driven gear 215, the driving gear 217 cannot rotate under the condition that the driven gear 215 cannot rotate, so that when the linkage gear 112 of the driving member 11 drives the driving screw 211 in the state of the first position, the driving gear 217 carries the linkage box 214 and the driven gear 215 inside the linkage box along with the transmission shaft 212 and the driving screw 211 to do back and forth linear motion.
As described above, the frequency-selective phase shifting device of the present invention is used for controlling the phase modulation control member (not shown) in each frequency-selective phase shifting unit to perform phase shifting. In each frequency-selective phase shifting unit 2, the plurality of phase-modulating control members are divided into two rows, and are parallel and staggered on two sides of the axial direction of the drive screw, that is, are arranged in the range of the axial movement stroke of the linkage box 214 in the frequency-selective phase shifting device in parallel and staggered manner, and each phase-modulating control member monopolizes one width of the axial movement stroke of the driven gear 215, that is, monopolizes one axial position, so that when the drive member 11 is in the state of the first position, the drive member 11 is rotated, and the driven gear 215 moves axially along the drive screw 211, the driven gear 215 can be aligned with only one phase-modulating control member at each corresponding axial position. Preferably, the phase modulation control member may be a rack (not shown) for forming a rack and pinion gear with the driven gear 215.
Each phase modulation control element is used for a frequency band signal of a corresponding antenna and is used for connecting a phase shifting component of the corresponding frequency band signal. The radiation unit column for radiating the frequency band signal is charged with one or more phase shifters for shifting the phase of the signal and feeding the signal to each corresponding radiation unit of the radiation unit column, and the phase shifting of each phase shifter is realized by the movement of the phase shifting component.
Therefore, after the first linkage gear 213 is rotated to move the driven gear 215 to the axial position corresponding to the corresponding phasing control element, when the transmission element 11 is in the second state, the transmission element 11 is rotated to link the driven gear 215, and the driven gear 215 outputs a linear moment to the phase shifting element through the rack-and-pinion transmission mechanism, so as to drive the phase shifting element to displace to realize phase shifting.
Specifically, referring to fig. 11, when the transmission member 11 is in the second position, the second linking gear 216 of one of the phase shift transmission mechanisms 21 is meshed with the meshing teeth 111 in the shaft hole 110 of the linking gear 112 of the transmission member 11, and the first linking gear 213 is meshed with the external teeth 112 of the linking gear 112 of the transmission member 11. When the transmission member 11 rotates, the transmission member 11 drives the second linking gear 216 meshed with the meshing gear 111 in the shaft hole 110 of the linking gear 112 to rotate in the same direction, and the external teeth 112 of the linking gear 112 of the transmission member 11 drive the first linking gear 213 to move in the opposite direction. Therefore, the transmission shaft 212 and the transmission screw 211 are driven by the second linkage gear 216 and the first linkage gear 213 to perform the opposite circumferential movement. Since the driven gear 215 is fixedly arranged on the transmission shaft 212 and moves along with the transmission shaft 212 in the same direction, the driven gear 215 is meshed with the driving gear 217, so that the driven gear 215 drives the driving gear 217 to rotate in one direction. In addition, since the driving gear 217 and the driving screw 211 form a screw nut driving structure, the driving screw 211 also provides a trend of driving the driving gear 217 to rotate in the same direction, the front trend and the rear trend are the same in stress direction, and both directions are simultaneously controlled by the driving member 11, so that the driving gear 217 and the driven gear 215 are meshed with each other to rotate, and the rotation directions of the driving gear 217 and the driven gear 215 are opposite to each other, but stay in the original axial position to do circumferential movement, so as to achieve 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, and the phase modulation control piece at the axial position and the driven gear 215 protruding out of the surface of the linkage box 214 form a gear-rack transmission mechanism, so that the driven gear 215 can be rotated in situ at the same axial position to drive the phase modulation control piece at the corresponding position to move so as to realize phase shifting.
In another embodiment, two linkage boxes 214 may be disposed in the same frequency-selecting phase-shifting unit, each linkage box 214 is provided with a driving gear 217 and a driven gear 215 with the same structure, and the two linkage boxes realize synchronous linkage through a linkage member. The two linkage boxes 214 are spaced apart by 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, since the two linkage boxes 214 are arranged in the same frequency-selecting and phase-shifting unit, the stroke of each of the two linkage boxes 214 moving transversely can be shortened to realize frequency selection, so that the operation time required for frequency selection can be shortened.
In the phase shift transmission mechanism 21, a stop block is provided on a surface of the driving gear 217 opposite to the first linkage gear 213, and is used for cooperating with a limit opening provided at a thread start position of the transmission screw 211 to limit the screw nut transmission mechanism in a linear travel direction.
The turnover mechanism 13 is used for controlling the circumferential rotation of the transmission piece 11. Which includes a second control part 131 and a compound gear 132. The compound gear 132 includes a bevel gear 1321 for meshing with the rotary gear 113 of the transmission member 11 and a large gear 1322 formed coaxially with the bevel gear, and the second control part 131 is also provided with a gear 1310 meshing with the large gear 1322 in the compound gear 132. When the second control part 131 is rotated, the gear of the second control part 131 drives the bevel gear 1321 of the compound gear 132 to rotate through the large gear 1322 of the compound gear 132, and the compound gear 132 drives the rotating gear 113 of the transmission member 11 to reversely move through the bevel gear 1321 thereof. Therefore, the rotation direction of the transmission member 11 can be controlled by the second control portion 131. The corresponding function of the transmission member 11 is realized in the states of the first position and the second position.
The basic design principle of the frequency-selective phase-shifting unit is further explained below by means of an operating embodiment of the frequency-selective phase-shifting device according to the invention.
One state of the frequency-selecting phase-shifting device is set to be an initial state, for example, the linkage box 214 is located at the starting position of the sliding range, and the transmission member 11 is located at the first position of one of the frequency-selecting phase-shifting units. These starting positions may of course be designed by the skilled person according to his design habits, each of which is a reference point, as the invention is not limited in this respect.
First, the position of the target phase modulation control member at the frequency-selecting phase shifting device is determined, for example, the corresponding phase modulation control member at an axial position M at one end of the frequency-selecting phase shifting unit 2A in fig. 9 is the target phase modulation control member for the current operation.
Referring to fig. 6, the first control part 121 is turned, the first control part 121 drives the transmission gear 122, and the driven gear 1222 end of the transmission gear 1222 is meshed with the in-line teeth 1231 of the box body 123, so that the transmission gear 1222 drives the box body 123 through the in-line teeth 1231, and further drives the transmission member 11 in the box body 123 to move in the moving direction thereof. In this operation, the transmission member 11 is moved to the direction of the frequency-selective phase-shift unit 2A by rotating the first control section 121 in the direction of the frequency-selective phase-shift unit 2A.
First, the transmission member 11 is moved to the first position at the end of the frequency-selective phase shift unit 2A, and referring to fig. 10, one of the linking gears 112 of the transmission member 11 is engaged with the first linking gear 213, and the rotation of the first control unit 121 is stopped. At this time, the second control part 131 starts to rotate, the second control part 131 drives the compound gear 132, the bevel gear 1321 of the compound gear drives the driving member 11 at the same time, the driving member 11 drives the first linkage gear 213 engaged with the first linkage gear 213, and the first linkage gear 213 drives the driving screw 211 fixedly connected with the first linkage gear 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 simultaneously move axially along the driving screw 211 and the driving shaft 212, and the movement principle thereof is already described when describing the state of the driving member 11 in the first position, and will not be described herein. When the linkage box 214 moves to the axial position M where the target phase modulation control member is located, the rotation of the second control portion 131 is stopped.
Next, the first control part 121 is rotated again, the driving member 11 is moved to the second position thereof, and as shown in fig. 11, the driving member 11 is simultaneously engaged with the first linkage gear 213 and the second linkage gear 216, and the rotation of the first control part 121 is stopped.
The second control part 131 is rotated again in the state of the second position, so that the interlocking box 214 and the two gears inside thereof stay at the position M, and the driven gear 215 and the driving gear 217 are rotated in place. Therefore, in this state, the driven gear 215 may drive the movement of the target phase modulation control element corresponding to the position M, so as to control the displacement of the movement of the target phase modulation control element, and correspondingly complete 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 member is completed, the rotation of the second control portion 131 is stopped, that is, the phase shift operation corresponding to one target phase modulation control member is completed.
After the phase modulation work is finished, if other phase modulation control members are required to be controlled to modulate phase, the state of the first position of the transmission member 11 is controlled by the switching control mechanism, the positions of the other phase modulation control members are selected, and the phase shifting work is finished by switching to the state of the second position. If the phase modulation control member of another phase modulation unit 2B needs to be controlled, the transmission member is moved to the end of the phase modulation unit 2B by the switching control mechanism, as shown in fig. 9, 10 and 11, the above steps of controlling the transmission member 11 at the first position and the second position are repeated, and thus the phase shift of the antenna frequency band signals corresponding to the phase modulation control members can be controlled. In addition, a clamping bar 1232 can be arranged at the side of the box body 123 provided with the transmission member 11, after the switching control mechanism is switched to the frequency-selecting phase-shifting unit at one end needing phase modulation, the locking bar 1232 will lock the first linkage gear 213 of the other end frequency-selective phase shift unit to prevent it from being rotated accidentally.
Therefore, the frequency-selecting phase shifting device provided by the embodiment realizes the state switching of different positions by making the transmission member 11 of the straight running mechanism 12 be at different positions of the axial travel of the transmission member. If in the first position state, only the linkage gear 112 is engaged with the first linkage gear 213, and in the second position state, the linkage gear 112 is simultaneously engaged with the first linkage gear 213 and the second linkage gear 216, and the second control part 131 is combined to control the frequency-selecting phase-shifting device to select the target phase-modulating control part in the first position state, and to modulate the phase in the second position state. Thereby achieving the purpose of controlling the phase shift of a plurality of phase modulation control pieces by controlling two control parts by using the frequency selection phase modulation device.
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 modulation control elements can be reduced to adapt to corresponding products, and the invention is not limited to the above.
In other embodiments, the frequency-selecting phase-shifting device may also only adopt one frequency-selecting phase-shifting unit of the present invention to work in cooperation with the switching control mechanism, and the specific working principle is the same as that described above, which is not repeated.
In one embodiment, the first control part and the second control part can be respectively connected with a motor, and the first control part and the second control part are driven to work by the motor, so that the phase shift control mechanism can automatically work.
The invention also provides a multi-frequency antenna, which comprises the phase-shifting control mechanism and a plurality of phase-shifting components corresponding to a plurality of frequency bands, wherein each phase-shifting component is provided with a phase-shifting control piece in the corresponding frequency-selecting phase-shifting device, and the phase-shifting control piece is arranged in linkage with the phase-shifting control piece.
The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in the present invention is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept described above. Such as the above-mentioned features and the features having similar functions (but not limited to) of the invention.
Claims (12)
1. A phase shift control mechanism, characterized in that:
the phase shift control mechanism comprises a transmission part, a straight running mechanism and a turnover mechanism;
the transmission piece comprises a linkage shaft, two linkage gears arranged at two ends of the linkage shaft and a rotating gear sleeved at the middle part of the linkage shaft, wherein the rotating gear is used for driving the two linkage gears to synchronously rotate in the same direction;
the straight running mechanism is used for controlling the transmission member to switch among a plurality of positions in the axial direction so as to enable the two positions of the transmission member in the axial direction to be connected with any one of a plurality of frequency-selecting phase-shifting units;
the turnover mechanism is used for controlling the transmission piece to circumferentially rotate;
wherein, for each connected frequency-selecting phase-shifting unit, at the first position of the two positions, the transmission member is linked with a driven gear in the frequency-selecting phase-shifting unit to linearly operate so as to be suitable for aligning any one of a plurality of phase-modulating control members which are linearly arranged; at a second position, the transmission member is linked with the driven gear to rotate circumferentially and is suitable for controlling the aligned phase modulation control member to perform phase shifting;
when the transmission part is positioned at the first position, one of the linkage gears of the transmission part only meshes with the first linkage gear of the corresponding frequency-selecting phase-shifting unit, and the driven gear is linked by the first linkage gear to linearly run so as to realize the alignment; when the transmission part is positioned at the second position, one of the linkage gears of the transmission part is simultaneously meshed with the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-shifting unit, so that the first linkage gear and the second linkage gear act together to link the driven gear to circumferentially rotate for phase shifting.
2. The phase shift control mechanism according to claim 1, wherein: the straight running mechanism is used for controlling a box body covering the transmission piece to linearly run so as to drive the transmission piece to linearly run along the axial direction, so that the transmission piece can be switched among a plurality of positions.
3. The phase shift control mechanism according to claim 2, wherein: the straight-moving mechanism comprises a first control part, a box body covering a transmission part and a transmission wheel shaft, wherein the box body is provided with straight-row teeth parallel to the axial direction of the transmission part, 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 post gear meshed with the straight-row teeth.
4. The phase shift control mechanism according to claim 1, wherein: the turnover mechanism comprises a second control part and a compound gear, wherein the compound gear comprises a bevel gear which is used for being meshed with a rotating gear of the transmission part and a big gear which is formed coaxially with the bevel gear, and the second control part is also provided with a gear which is meshed with the big gear in the compound gear.
5. The phase shift control mechanism according to any one of claims 1 to 4, characterized in that: the number of the frequency-selecting phase-shifting units is two, and the frequency-selecting phase-shifting units are respectively arranged at two axial sides of the transmission part.
6. The phase shift control mechanism according to claim 1, wherein: the linkage gear of the transmission piece is used for being meshed with the first linkage gear, and the meshing teeth formed in the shaft hole of the linkage gear are used for being meshed with the second linkage gear.
7. The phase shift control mechanism according to claim 5, wherein: each frequency-selecting phase-shifting unit comprises a phase-shifting transmission mechanism and a plurality of phase-modulating control pieces driven by the phase-shifting transmission mechanism, the phase-shifting transmission mechanism comprises a transmission screw rod erected on a bracket and a transmission shaft with a polygonal section, the driving end of the transmission screw rod is fixedly provided with a first linkage gear, a driven gear of the transmission shaft and a driving gear meshed with the driven gear and screwed with the transmission screw rod are sleeved in a linkage box in a sliding manner, and the driving end of the transmission shaft is fixedly provided with a second linkage gear.
8. The phase shift control mechanism according to claim 7, wherein: each frequency-selecting phase-shifting unit is provided with a plurality of phase-modulating control pieces which are divided into two rows and are parallel and staggered on two sides of the axial direction of the driving screw so that the driven gears are meshed alternatively.
9. The phase shift control mechanism according to claim 7, wherein: the phase modulation control piece is a rack and is used for forming a gear-rack transmission mechanism with the driven gear.
10. The phase shift control mechanism according to claim 7, wherein: in the phase shift 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 control mechanism according to claim 7, wherein: 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 shifting elements corresponding to a plurality of frequency bands, characterized in that it comprises a phase shifting control mechanism according to any one of claims 1 to 11.
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| CN112582766A (en) * | 2021-02-20 | 2021-03-30 | 京信通信技术(广州)有限公司 | Multi-frequency antenna and phase-shifting switching control mechanism thereof |
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| CN112582766A (en) * | 2021-02-20 | 2021-03-30 | 京信通信技术(广州)有限公司 | Multi-frequency antenna and phase-shifting switching control mechanism thereof |
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