CN112563691B - Multi-frequency antenna and frequency-selecting phase-shifting device thereof - Google Patents
Multi-frequency antenna and frequency-selecting phase-shifting device thereof Download PDFInfo
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- CN112563691B CN112563691B CN202110191542.1A CN202110191542A CN112563691B CN 112563691 B CN112563691 B CN 112563691B CN 202110191542 A CN202110191542 A CN 202110191542A CN 112563691 B CN112563691 B CN 112563691B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
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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
- H01Q3/32—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 mechanical means
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides a multi-frequency antenna and a frequency-selecting phase-shifting device thereof, wherein the frequency-selecting phase-shifting device controls the states of two positions of a columnar gear through a switching control mechanism, and the columnar gear only engages with a first linkage gear at a first position so as to move a linkage box and a driving gear and a driven gear inside the linkage box to the corresponding axial positions of a target phase-shifting control piece. The columnar gear is meshed with the first linkage gear and the second linkage gear at the second position at the same time, the driven gear rotates in situ at the determined axial position when in the first position, and the driven gear drives the target phase modulation control piece corresponding to the axial position to complete the phase shifting work of the target phase modulation control piece. The position state of the columnar gear is switched through the switching control mechanism, and stable phase shifting of antenna frequency band signals corresponding to the phase modulation control elements can be realized through simple control.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a multi-frequency antenna and a frequency-selecting phase-shifting device 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 purpose of the present invention is to provide a frequency-selecting phase-shifting device with stable control and simple operation.
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 frequency-selecting phase-shifting device, which comprises a switching control mechanism and at least two frequency-selecting phase-shifting units, wherein each frequency-selecting phase-shifting unit comprises a phase-shifting transmission mechanism and a plurality of phase-shifting control pieces selected for transmission by the phase-shifting transmission mechanism,
each phase-shifting transmission mechanism comprises a transmission screw rod erected on the support and a transmission shaft with a polygonal cross section, a first linkage gear is fixedly arranged at the driving end of the transmission screw rod, 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 a second linkage gear is fixedly arranged at the driving end of the transmission shaft;
the switching control mechanism comprises a columnar gear, a straight-moving mechanism and an epicyclic mechanism, wherein the two ends of a shaft hole of the columnar gear are provided with meshing teeth which are matched with the second linkage gear, and the columnar teeth on the column surface of the columnar gear are used for meshing with the first linkage gear;
the straight-moving mechanism is used for controlling a box body provided with the columnar gear to move linearly so as to drive the columnar gear to move between positions meshed with the second linkage gears, and in the process of the straight-moving mechanism, corresponding to each phase-shifting transmission mechanism, the columnar gear only meshes with the first linkage gear at the first position and simultaneously meshes with the first linkage gear and the second linkage gear at the second position;
the revolving mechanism is used for controlling the cylindrical gear to rotate circumferentially.
Furthermore, 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.
Furthermore, the revolving mechanism comprises a second control part and a composite gear, the composite gear comprises a large gear engaged with the columnar teeth 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 engaged with the bevel gear in the composite gear.
Furthermore, in the phase-shifting transmission mechanism, a stop block is arranged on the surface of the driving gear opposite to the first linkage gear and is used for matching with a limit port arranged at the thread starting position of the transmission screw to realize the limit of the screw nut transmission mechanism in the linear stroke direction.
Furthermore, in each frequency-selecting phase modulation unit, the phase modulation control elements are divided into two rows which are parallel and staggered side by side at two sides of the axial direction of the transmission screw.
Furthermore, the phase modulation control part is a rack and is used for forming a gear and rack transmission mechanism with the driven gear.
Furthermore, 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.
Furthermore, two linkage boxes are arranged in the same frequency-selecting phase-modulating unit, 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.
Furthermore, the axial length of the columnar gear is that when one end of the columnar gear is meshed with the first linkage gear of one frequency-selecting phase modulation unit, the other end of the columnar gear is enough to be unhooked with the first linkage gear of the other frequency-selecting phase modulation unit.
In order to achieve another object of the present invention, the present invention further provides a multi-frequency antenna, which includes a plurality of phase-shifting units corresponding to a plurality of frequency bands, and the multi-frequency antenna includes the frequency-selective phase-shifting apparatus, and each of the phase-shifting units has a phase-modulating control element in the corresponding frequency-selective phase-shifting apparatus and is linked with the phase-modulating control element.
The technical scheme provided by the invention has the beneficial effects that:
the frequency-selecting phase-shifting device provided by the invention controls the states of two positions of the columnar gear through the switching control mechanism, and the columnar gear only engages with the first linkage gear at the first position so as to move the linkage box and the driving gear and the driven gear inside the linkage box to the corresponding axial positions of the target phase modulation control piece. The columnar gear is meshed with the first linkage gear and the second linkage gear at the second position, the driven gear axially moves in situ at the axial position determined when the driven gear is at the first position, and the driven gear drives the target phase modulation control piece corresponding to the axial position to complete the phase shifting work of the target phase modulation control piece. The position state of the columnar gear is switched through the switching control mechanism, and stable phase shifting of antenna frequency band signals corresponding to the phase modulation control elements can be realized through simple control.
In addition, the switching control mechanism can also selectively switch the cylindrical gear between the two frequency-selecting phase modulation units and execute the phase-shifting work corresponding to the phase modulation control element in the frequency-selecting phase modulation unit.
The phase modulation control device is relatively simple in structure, the phase modulation control elements can be controlled only by two-way transmission, the two-way transmission is skillfully combined by the mutual matching of the two linkage gears, the structure is stable, and the improvement cost is effectively controlled while the stable operation of the control process is ensured.
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 apparatus according to an embodiment of 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 usage state of the frequency-selective phase-shifting apparatus according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of another operating state of the frequency-selective phase-shifting apparatus according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of another operating mode of the frequency-selective phase-shifting apparatus according to an embodiment of 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 invention provides a frequency-selecting phase-shifting device, as shown in fig. 1, comprising a 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 members (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 the two frequency-selective phase modulation units 2 are respectively disposed at both 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 columnar gear 11 is such that when one end thereof engages the first interlocking gear 213 of one frequency-selective phase modulating unit 2, the other end thereof is sufficiently disengaged from the first interlocking gear 213 of the other frequency-selective phase modulating 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-modulating unit 2, the phase-modulating control elements are divided into two rows, and are parallel and staggered to be arranged at two axial sides of the transmission screw rod, that is, arranged in a range of the axial movement stroke of the linkage box 214 in the frequency-selecting phase-shifting device, and each phase-modulating 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 at the first position, and the driven gear 215 moves axially along the transmission screw rod 211, the driven gear 215 can only align with one phase-modulating 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 is realized. 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-selective phase modulation unit, each linkage box 214 has 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 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-modulating unit, the transverse moving stroke of each of the two linkage boxes 214 can be shortened to realize frequency selection, so that 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 device according to the present invention is further illustrated by an operating embodiment thereof.
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 phasing unit 2A by rotating the first control portion 121 in the direction of the frequency-selective phasing unit 2A.
First, the cylindrical gear 11 is moved to the first position at the end of the frequency-selective phase modulation 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 modulation unit 2B needs to be controlled, the columnar gear is moved to one end of the frequency-selecting phase modulation unit 2B through the switching control mechanism, as shown in fig. 10, the control steps of the columnar 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, the side of the box body 123 provided with the cylindrical gear 11 can be further provided with a clamping strip 1232, and after the switching control mechanism is switched to the frequency-selecting phase-modulating unit at one end which needs phase modulation, the clamping strip 1232 can clamp the first linkage gear 213 of the frequency-selecting phase-modulating 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 addition, in the embodiment of the present invention, only one frequency-selecting phase-shifting unit may be matched with the switching control mechanism for operation, and the specific operating principle is the same as that described above, which is not repeated.
The invention also provides a multi-frequency antenna, which comprises a plurality of phase-shifting parts corresponding to a plurality of frequency bands, and the frequency-selecting phase-shifting device, wherein each phase-shifting part is provided with a corresponding phase-modulating control part in the frequency-selecting phase-shifting device in linkage with the phase-modulating 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.
Claims (10)
1. The utility model provides a frequency-selecting phase-shifting device, includes switching control mechanism and two at least frequency-selecting phase modulation units, and every frequency-selecting phase modulation unit includes phase-shifting drive mechanism and selects a driven a plurality of phase modulation control spare by it, its characterized in that:
each phase-shifting transmission mechanism comprises a transmission screw rod erected on the support and a transmission shaft with a polygonal cross section, a first linkage gear is fixedly arranged at the driving end of the transmission screw rod, 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 a second linkage gear is fixedly arranged at the driving end of the transmission shaft;
the switching control mechanism comprises a columnar gear, a straight-moving mechanism and an epicyclic mechanism, wherein the two ends of a shaft hole of the columnar gear are provided with meshing teeth which are matched with the second linkage gear, and the columnar teeth on the column surface of the columnar gear are used for meshing with the first linkage gear;
the straight-moving mechanism is used for controlling a box body covered with the columnar gear to move linearly so as to drive the columnar gear to move between positions meshed with the two second linkage gears, and in the process of the straight-moving mechanism, corresponding to each phase-shifting transmission mechanism, the columnar gear only meshes with the first linkage gear at the first position and simultaneously meshes with the first linkage gear and the second linkage gear at the second position;
the revolving mechanism is used for controlling the cylindrical gear to rotate circumferentially.
2. The frequency-selective phase-shifting apparatus according to claim 1, wherein: the straight-moving mechanism comprises a first control part, a box body and a transmission wheel shaft, wherein the box body is covered with a columnar gear, the box body is provided with straight-line 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-line teeth.
3. The frequency-selective phase-shifting apparatus according to claim 1 or 2, wherein: the turnover mechanism comprises a second control part and a composite gear, the composite gear comprises a large gear meshed with the columnar teeth 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.
4. The frequency-selective phase-shifting apparatus according to claim 3, wherein: in the phase-shifting transmission mechanism, a stop block is arranged on the surface of the driving gear opposite to the first linkage gear and is used for matching with a limit port arranged at the thread starting position of the transmission screw to limit the screw nut transmission mechanism in the linear stroke direction.
5. The frequency-selective phase-shifting apparatus according to claim 3, wherein: in each frequency-selecting phase modulation unit, a plurality of phase modulation control elements are divided into two rows which are parallel and staggered side by side on two axial sides of the transmission screw.
6. The frequency-selective phase-shifting apparatus according to claim 3, wherein: the phase modulation control part is a rack and is used for forming a gear rack transmission mechanism with the driven gear.
7. The frequency-selective phase-shifting apparatus according to claim 3, 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.
8. The frequency-selective phase-shifting apparatus according to claim 3, wherein: and two linkage boxes are arranged in the same frequency-selecting phase-modulating unit, 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.
9. The frequency-selective phase-shifting apparatus according to claim 3, wherein: the axial length of the columnar gear is that when one end of the columnar gear is meshed with the first linkage gear of one frequency-selecting phase modulation unit, the other end of the columnar gear is enough to be unhooked with the first linkage gear of the other frequency-selecting phase modulation unit.
10. A multi-frequency antenna comprising a plurality of phase-shifting sections corresponding to a plurality of frequency bands, comprising the frequency-selective phase-shifting apparatus according to any one of claims 1 to 9, wherein each of the phase-shifting sections has a phase-modulating control member associated therewith.
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| US3979084A (en) * | 1975-05-01 | 1976-09-07 | Chase Brass And Copper Co., Inc. | Apparatus for level winding tubing |
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| CN110401037A (en) * | 2019-06-25 | 2019-11-01 | 广东晖速通信技术股份有限公司 | A kind of switching of multifrequency electrical tilt antenna long-distance transmission and self-locking device |
| CN210668695U (en) * | 2019-07-03 | 2020-06-02 | 弗兰德科技（深圳）有限公司 | Phase-shifting transmission structure and antenna thereof |
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