CN114221130A - 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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- CN114221130A CN114221130A CN202111584374.9A CN202111584374A CN114221130A CN 114221130 A CN114221130 A CN 114221130A CN 202111584374 A CN202111584374 A CN 202111584374A CN 114221130 A CN114221130 A CN 114221130A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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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
Abstract
The invention provides a frequency-selecting phase-shifting device.A phase-shifting gear is fixedly arranged on a transmission screw rod of a frequency-selecting mechanism, the transmission screw rod is driven by a driving gear to move along the axial direction of the transmission screw rod, so that the phase-shifting gear can move to any one position of phase-shifting racks corresponding to a plurality of frequency bands arranged in parallel side by side and is meshed with the position, namely the phase-shifting rack corresponding to an antenna of a certain frequency band is selected; in addition, the drive gear of the phase-shifting mechanism and the drive gear of the frequency selecting mechanism drive the transmission screw rod to rotate only in the circumferential direction, so that the phase-shifting gear drives the phase-shifting rack meshed with the phase-shifting gear to move, and phase modulation operation is carried out on the antenna with the frequency band corresponding to the phase-shifting rack. Therefore, the purpose of controlling the phase shift of the antenna frequency band signals corresponding to the plurality of phase shift racks is achieved. The invention also provides a multi-frequency antenna comprising the frequency-selecting phase-shifting device.
Description
Technical Field
The invention belongs to the technical field of mobile communication, and particularly relates 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 and phase-shifting device, which comprises phase-shifting racks corresponding to a plurality of frequency bands arranged side by side, a frequency-selecting mechanism controlled by a driving moment to select the phase-shifting rack of one of the frequency bands, and a phase-shifting mechanism controlled by the driving moment to perform phase-shifting control on the selected phase-shifting rack, wherein the frequency-selecting mechanism comprises a transmission screw rod, a driving gear and a phase-shifting gear, the transmission screw rod is axially arranged in parallel with the arrangement direction of the plurality of phase-shifting racks, the driving gear is spirally arranged with the transmission screw rod, the phase-shifting gear is fixedly arranged on the transmission screw rod, and the driving gear is used for driving the transmission screw rod to linearly move along the arrangement direction so that the transmission screw rod drives the phase-shifting gear to be meshed with the phase-shifting rack of any one frequency band;
the phase shifting mechanism comprises a driving gear sleeved on the transmission screw rod, and the driving gear is used for driving the transmission screw rod to rotate in the circumferential direction so that the phase shifting gear drives the phase shifting rack meshed with the phase shifting gear to move.
Furthermore, the transmission screw is provided with at least one anti-rotation groove, the anti-rotation groove is arranged along the axial direction of the transmission screw in a penetrating mode, and the inner hole of the driving gear corresponds to the anti-rotation groove and is provided with matched clamping teeth.
Furthermore, the cross section of the anti-rotation groove is in an arc section shape or a regular polygon shape or an irregular polygon shape, and the shape of the cross section of the latch corresponds to the shape of the cross section of the anti-rotation groove.
Furthermore, the central axis of the phase-shifting gear coincides with the central axis of the transmission screw, and the phase-shifting gear is fixedly sleeved on the transmission screw.
Further, the phase shift gear and the transmission screw are integrally formed.
Furthermore, the frequency selection mechanism further comprises a first motor, the first motor is driven by the first gear train, the driving gear rotates, the phase shift mechanism further comprises a second motor, and the second motor is driven by the second gear train, and the driving gear rotates.
Furthermore, the frequency-selecting phase-shifting device further comprises a supporting seat, and the supporting seat is used for supporting the phase-shifting rack, the frequency-selecting mechanism and the phase-shifting mechanism.
Furthermore, two ends of the phase shift rack in the length direction are respectively sleeved with a support frame, and a channel for the movement of the phase shift rack is formed between the two support frames.
Furthermore, the frequency-selecting phase-shifting device is provided with two rows of phase-shifting racks, the two rows of phase-shifting racks are arranged on two sides of the transmission screw rod in the axial direction, and the two rows of phase-shifting racks are arranged in a staggered mode.
The invention also provides a multi-frequency antenna which comprises a plurality of phase-shifting parts corresponding to a plurality of frequency bands and is characterized by comprising the frequency-selecting phase-shifting device, wherein each phase-shifting part is provided with a phase-shifting rack corresponding to one frequency-selecting phase-shifting device and linked with the phase-shifting rack
Compared with the prior art, the invention has the following advantages:
the invention provides a frequency-selecting phase-shifting device.A phase-shifting gear is fixedly arranged on a transmission screw rod in a frequency-selecting mechanism, and the transmission screw rod is driven by a driving gear to move along the axial direction of the transmission screw rod, so that the phase-shifting gear can move to any one position of phase-shifting racks corresponding to a plurality of frequency bands arranged in parallel side by side and is meshed with the position, namely the phase-shifting rack corresponding to an antenna of a certain frequency band is selected; in addition, the drive gear of the phase-shifting mechanism and the drive gear of the frequency selecting mechanism drive the transmission screw rod to rotate only in the circumferential direction, so that the phase-shifting gear drives the phase-shifting rack meshed with the phase-shifting gear to move, and phase modulation operation is carried out on the antenna with the frequency band corresponding to the phase-shifting rack. Therefore, the purpose of controlling the phase shift of the antenna frequency band signals corresponding to the plurality of phase shift racks is achieved.
In addition, the frequency-selecting phase-shifting device has the advantages of simple structure, ingenious and reasonable combination of the frequency-selecting mechanism and the moving mechanism, simple operation and stable phase modulation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an internal structure of a frequency-selective phase-shifting apparatus according to the present invention;
FIG. 2a is a schematic structural view of the drive screw of the present invention;
FIG. 2b is a schematic cross-sectional view of the drive screw of the present invention;
FIG. 3 is a schematic diagram of a frequency-selective phase-shifting apparatus according to the present invention;
FIG. 4 is a schematic diagram of a phase-shifting state structure of the frequency-selective phase-shifting apparatus provided by the present invention;
fig. 5 is a schematic structural diagram of another frequency-selecting state of the frequency-selecting phase-shifting apparatus provided by the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.
The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence relationship of the functions executed by the devices, modules or units.
The invention provides an antenna frequency-selecting phase-shifting device which is used for realizing phase modulation control on any frequency band signal in a multi-frequency antenna. As shown in fig. 1, the frequency-selecting phase-shifting device includes a plurality of phase-shifting racks 1 corresponding to a plurality of frequency bands, a frequency-selecting mechanism 2 controlled by a driving torque to select one of the frequency bands of the phase-shifting racks 1, and a phase-shifting mechanism 3 controlled by the driving torque to perform phase-shifting control on the selected phase-shifting rack 1.
The frequency selection mechanism 2 comprises a transmission screw 21 axially arranged in parallel with the arrangement direction of the plurality of phase-shifting racks 1, a driving gear 22 screwed with the transmission screw 21, and a phase-shifting gear 23 fixedly arranged on the transmission screw 21.
As shown in fig. 2a, the driving screw 21 is provided with at least one anti-rotation slot 210, and the anti-rotation slot 210 penetrates from the end of one end of the driving screw 21 to the end of the other end of the driving screw 21 along the axial direction of the driving screw 21. As shown in fig. 2b, the cross-section of the anti-rotation slot 210 has an arc segment shape or a regular polygon shape or an irregular polygon shape. In the embodiment shown in the figures, two anti-rotation slots 210 are provided, and are symmetrically arranged on two sides of the central axis of the transmission screw 21. In other embodiments, the number of the anti-rotation slots 210 may be three or one, and is not limited to the embodiment shown in the drawings.
The central axis of the phase-shifting gear 23 coincides with the central axis of the transmission screw 21, and the phase-shifting gear 23 is fixedly sleeved on the transmission screw 21. In this embodiment, the number of the phase shift gears 23 is only one, and the fixed sleeve is provided at the end of the drive screw 21. The phase shift gear 23 and the driving screw 21 may be integrally formed, or may be fixedly disposed at one end of the driving screw 21 as an accessory.
The driving gear 22 is sleeved on the transmission screw 21. The gear hole of the driving gear 22 is a threaded hole, and the threaded hole is matched with the transmission screw 21, so that the driving gear 22 and the transmission screw 21 form a transmission screw mechanism. When the driving gear 22 rotates circumferentially, the driving screw 21 is driven to move linearly back and forth along the arrangement direction of the phase shift racks 1 without rotating circumferentially, so that the phase shift gears 23 move between the positions of the phase shift racks 1 corresponding to each frequency band. And the phase shift gear 23 can be meshed with the phase shift rack 1 corresponding to any frequency band, when the phase shift gear 23 moves to the target phase shift rack 1 and is meshed with the target phase shift rack 1, the transmission screw 21 is stopped being driven, and the phase shift rack 1 corresponding to the antenna of the target frequency band selected by the phase shift gear 23 can be completed.
The phase shift mechanism 3 comprises a driving gear 31 sleeved on the transmission screw 21 and arranged at the same end with the driving gear 22. The hole of drive gear 31 is the round hole to make wear to establish the drive screw 21 of drive gear's hole can not drive gear 31 linear motion, set up on drive gear 31's the hole with drive screw 21 prevent that rotation groove 210 quantity and shape assorted latch, drive gear 31 cup joints when drive screw 21, and the latch in drive gear 31 hole is put into drive screw 21 prevents that rotation groove 210 is interior, makes drive gear 31 and drive screw 21 can the joint, when rotating drive gear 31, drive screw 21 is along with drive gear 31 does the syntropy and rotates. Because the anti-rotation groove 210 penetrates from the end part of one end of the transmission screw 21 to the other end of the transmission screw 21 along the axial direction of the transmission screw 21, under the condition that the driving gear 22 rotates and the driving gear 31 does not rotate, the transmission screw 21 is circumferentially fixed with the driving gear 31 through the anti-rotation groove 210 in a clamping manner, and the transmission screw 21 is ensured not to rotate circumferentially in the process of linear movement along the arrangement direction of the phase shift rack 1. When the driving screw 21 moves linearly, the latch of the inner hole of the driving gear 31 moves relatively from one end of the anti-rotation slot 210 to the other end, so that the latch of the driving gear 31 does not block the linear motion of the driving screw 21, and the driving screw 21 does not drive the driving screw 31 to move linearly.
The driving gear 31 is further used for driving the transmission screw 21 to rotate circumferentially in the same direction, so that the phase shift gear 23 drives the phase shift rack 1 engaged therewith to move up and down (the upward or downward directions mentioned in the present invention are both opposite directions, which is only convenient for understanding the core of the present invention with reference to the drawings, and is not a limitation on the technical solution of the present invention). Specifically, when the phase shift gear 23 moves to the target phase shift rack 1, the phase shift gear 23 is engaged with the target phase shift rack 1, and the phase shift gear 23 needs to make a circumferential motion to drive the target phase shift rack 1 to move upward or downward. I.e. the drive screw 21 is not moved axially but is moved circumferentially. Because the driving gear 22 and the transmission screw 21 form a transmission screw mechanism, when the driving gear 31 drives the transmission screw 21 to move circumferentially, the driving gear 22 is rotated in the same direction, so that the driving gear 22 and the transmission screw 21 rotate in the same direction. Because the driving gear 22 and the transmission screw 21 do not rotate oppositely, the transmission screw 21 does not move axially relative to the driving gear 22, so that the phase shift gear 23 can be fixed at the position of the target phase shift rack 1 to rotate circumferentially, and the phase shift rack 1 is driven to move correspondingly.
The phase shift rack 1 is respectively connected with phase shift components (not shown in the attached drawing) of external phase shifters of different frequency bands, so that the moving direction and the displacement of the phase shift rack 1 can be controlled by controlling the rotating direction and the rotating number of turns of the phase shift gear 23, so as to control the displacement of the phase shift components of the phase shifter of the corresponding frequency band, and achieve the purpose of controlling the phase shift of the phase shifter of the frequency band.
The frequency selecting mechanism 2 further comprises a first motor 24, and a first gear train 25 fixedly connected with the first motor 24. The first gear train 25 includes one or more gears that cooperate to transfer the drive torque of the first motor 24 to the drive gear 22. When the first motor 24 drives the first gear train 25 to rotate, the first gear train 25 drives the driving gear 22 to rotate in the opposite direction, that is, the first motor 24 drives the driving gear 22 to rotate through the first gear train 25.
The phase shift mechanism 3 further includes a second motor 32, and a second gear train 33 fixedly connected to the second motor 32. The second gear train 33 includes one or more gears that cooperate to transfer the drive torque of the second motor 32 to the drive gear 31. When the second motor 32 drives the second gear train 33 to rotate, the second gear train 33 drives the driving gear 31 to rotate in the opposite direction, that is, the second motor 32 drives the driving gear 31 to rotate through the second gear train 33.
And two ends of the phase-shifting rack 1 in the length direction are respectively sleeved with a support frame 4 to support the phase-shifting rack. Meanwhile, the phase shift rack 1 can move back and forth on the support frame 4 along the length direction of the phase shift rack 1, and a channel for the movement of the phase shift rack 1 is formed between the two support frames 4.
The frequency-selecting phase-shifting device also comprises a supporting seat, and the supporting seat is used for supporting the phase-shifting rack 1, the frequency-selecting mechanism 2 and the phase-shifting mechanism 3.
The basic design principle of the frequency-selective phase-shifting device is further illustrated by an operating embodiment of the frequency-selective phase-shifting device.
Referring to fig. 1, the position of the phase shift gear 23 outside the first phase shift rack 1 is set as the initial state. The initial state is only the reference state of the operation and can be set according to specific conditions. And setting that the operation needs to phase modulate the antenna of the frequency band corresponding to the third phase-shifting rack 1, wherein the phase-shifting assembly is used as a target phase-shifting rack 1A of the operation. The forward rotation or reverse rotation mentioned in the present invention is a relative concept and is not a limitation to the core of the invention of the present invention.
Firstly, the phase shift gear 23 is moved to a position corresponding to the target phase shift rack 1A:
the second motor 32 is not driven, only the first motor 24 is driven to rotate in the forward direction, and the driving gear 22 is driven to rotate in the reverse direction through the first gear train 25. The driving gear 22 further drives the transmission screw 21, which forms a transmission screw mechanism, to move linearly in the axial direction through the inner hole of the driving gear 31. The drive screw 21 drives the phase shift gear 23 fixed at the end thereof to move in the same direction until the phase shift gear 23 meshes with the target phase shift rack 1A, as shown in fig. 3, and stops driving the first motor 24. The operation step can select the phase-shifting rack 1 of the corresponding frequency band of the frequency-selecting phase-shifting device so as to perform phase modulation on the antenna of the frequency band in the next step.
Secondly, phase modulation control is carried out on the target phase-shifting rack 1A:
the second motor 32 is driven to rotate in the forward direction or in the reverse direction according to the requirement of phase modulation, that is, according to whether the target phase-shifting rack 1A needs to move up or down. When the second motor 32 is set to rotate in the forward direction, the phase shift rack 1 moves downwards. The second motor 32 is driven to rotate forward, the driving gear 31 is driven to rotate in reverse direction through the second gear train 33, the first motor 24 is driven to rotate forward, the driving gear 22 is driven to rotate in reverse direction through the first gear train 25, and the transmission screw 21 and the driving gear 22 rotate in reverse direction simultaneously, so that the axial direction of the transmission screw 21 is kept static and only rotates in reverse direction in the circumferential direction, and the phase shift gear 23 is driven to rotate in reverse direction on the target phase shift rack 1A, and the target phase shift rack 1A is driven to move downwards. When the downward movement displacement of the target phase shift rack 1A satisfies the displacement amount required to move the antenna phase adjustment amount of the corresponding frequency band, as shown in fig. 4, the driving of the first motor 24 and the second motor 32 is stopped at the same time.
Then, the initial state is restored.
Only the first motor 24 is driven to rotate reversely, the moving screw 32 is driven to drive the phase-shifting gear 23 to gradually separate from the target phase-shifting rack 1A until the target phase-shifting rack moves to the initial state, and the first motor 24 is stopped being driven. The phase shift gear 23 is separated from the target phase shift rack 1A and returns to the initial state to avoid unnecessary phase shift action of the target phase shift rack 1A and other phase shift racks 1 due to misoperation or other reasons.
Of course, before the initial state is recovered, if the phase modulation is continuously performed on the antennas in other frequency bands, as shown in fig. 5, the target phase-shifting component is the last phase-shifting rack 1B, and the above operations are repeated, the phase-shifting gear 23 is shifted to the last phase-shifting rack 1B and engaged therewith, and the phase-shifting rack is shifted up or down according to the phase modulation requirement of the antenna corresponding to the phase-shifting rack. The frequency-selecting phase-shifting device can be restored to the initial state, and then the next target phase-shifting rack 1B is subjected to phase-shifting operation, and the operation sequences can be flexibly operated according to specific requirements on the premise of not departing from the core technology of the invention, which is not limited by the invention.
In the embodiment shown in the attached drawings, the plurality of phase-shifting racks 1 are arranged on the same side of the transmission screw 21 in the axial direction, in other embodiments, the frequency-selective phase-shifting device can also be provided with two rows of phase-shifting racks 1, the two rows of phase-shifting racks are arranged on two sides of the transmission screw 21 in the axial direction, and the two rows of phase-shifting racks are arranged in a staggered manner, so that the phase-shifting gear 23 can only be meshed with one phase-shifting rack 1 of one row of phase-shifting racks at a time. The number of the phase shift racks 1 can be set according to the specific requirements of the antenna frequency-selecting phase-shifting device, and is not limited herein.
In the above embodiment, the frequency-selective phase-shifting device is provided with only one phase-shifting gear 23, in other embodiments, two phase-shifting gears 23 may be provided on the drive screw 21, the two phase-shifting gears 23 share the drive screw 21, and only one phase-shifting gear 23 meshes with the phase-shifting rack 1 at a time. Therefore, those skilled in the art can flexibly change different embodiments according to the spirit of the present invention, which is not repeated herein.
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 phase-shifting rack 1 corresponding to one frequency-selecting phase-shifting device and is in linkage arrangement with the phase-shifting rack, so that the multi-frequency antenna has the function of phase modulation control on any frequency band signal.
In summary, the frequency-selecting phase-shifting device for phase modulation is optimized, has a simple structure, can more stably and simply realize phase modulation control on any frequency band signal in the multi-frequency antenna, and meets the requirements of increasing the frequency band of the antenna, along with simple and light structure and improvement on the reliability of the multi-frequency antenna.
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. A frequency-selecting phase-shifting device comprises a plurality of phase-shifting racks corresponding to frequency bands, a frequency-selecting mechanism controlled by a driving torque to select the phase-shifting rack of one of the frequency bands, and a phase-shifting mechanism controlled by the driving torque to perform phase-shifting control on the selected phase-shifting rack, and is characterized in that:
the frequency selection mechanism comprises a transmission screw rod, a driving gear and a phase-shifting gear, wherein the transmission screw rod is axially arranged in parallel to the arrangement direction of the phase-shifting racks, the driving gear is screwed with the transmission screw rod, the phase-shifting gear is fixedly arranged on the transmission screw rod, and the driving gear is used for driving the transmission screw rod to linearly move along the arrangement direction so that the transmission screw rod drives the phase-shifting gear to be meshed with the phase-shifting racks in any frequency band;
the phase shifting mechanism comprises a driving gear sleeved on the transmission screw rod, and the driving gear is used for driving the transmission screw rod to rotate in the circumferential direction so that the phase shifting gear drives the phase shifting rack meshed with the phase shifting gear to move.
2. The frequency-selecting phase-shifting device of claim 1, wherein the transmission screw is provided with at least one anti-rotation slot, the anti-rotation slot is arranged to penetrate along the axial direction of the transmission screw, and the inner hole of the driving gear is provided with a latch matched with the anti-rotation slot.
3. The frequency-selective phase-shifting device according to claim 2, wherein the cross section of the anti-rotation slot has a segment shape or a regular polygonal shape or an irregular polygonal shape, and the cross section of the latch has a shape corresponding to the cross section of the anti-rotation slot.
4. The frequency-selective phase-shifting device of claim 1, wherein the central axis of the phase-shifting gear coincides with the central axis of the driving screw, and the phase-shifting gear is fixedly sleeved on the driving screw.
5. The frequency-selective phase-shifting apparatus of claim 4, wherein the phase-shifting gear is integrally formed with the drive screw.
6. The frequency-selective phase-shifting apparatus according to claim 1, wherein said frequency-selective mechanism further comprises a first motor, said first motor driving said driving gear to rotate through a first gear train, said phase-shifting mechanism further comprises a second motor, said second motor driving said driving gear to rotate through a second gear train.
7. The frequency-selective phase-shifting apparatus according to claim 1, further comprising a support base for supporting the phase-shifting rack, the frequency-selective mechanism and the phase-shifting mechanism.
8. The frequency-selective phase-shifting device according to claim 1 or 7, wherein two ends of the phase-shifting rack in the length direction are respectively sleeved with a support frame, and a channel for the phase-shifting rack to move is formed between the two support frames.
9. The frequency-selective phase-shifting device according to claim 1, wherein the frequency-selective phase-shifting device is provided with two rows of phase-shifting racks, the two rows of phase-shifting racks are arranged on two sides of the drive screw in the axial direction, and the two rows of phase-shifting racks are arranged in a staggered manner.
10. A multi-frequency antenna comprising a plurality of phase shifting units corresponding to a plurality of frequency bands, characterized in that it comprises the frequency-selective phase shifting device according to any one of claims 1 to 9, each of said phase shifting units having a phase-shifting rack corresponding to one of said frequency-selective phase shifting devices and being linked therewith.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111584374.9A CN114221130A (en) | 2021-12-23 | 2021-12-23 | Multi-frequency antenna and frequency-selecting phase-shifting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111584374.9A CN114221130A (en) | 2021-12-23 | 2021-12-23 | Multi-frequency antenna and frequency-selecting phase-shifting device thereof |
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| CN114221130A true CN114221130A (en) | 2022-03-22 |
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| CN202111584374.9A Pending CN114221130A (en) | 2021-12-23 | 2021-12-23 | Multi-frequency antenna and frequency-selecting phase-shifting device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020945A (en) * | 2022-06-22 | 2022-09-06 | 京信通信技术(广州)有限公司 | Multi-frequency antenna and frequency-selecting phase-shifting module thereof |
| CN116073583A (en) * | 2023-03-07 | 2023-05-05 | 中兴通讯股份有限公司 | Electric tuning antenna downward inclination angle adjusting device and electric tuning antenna system |
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2021
- 2021-12-23 CN CN202111584374.9A patent/CN114221130A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020945A (en) * | 2022-06-22 | 2022-09-06 | 京信通信技术(广州)有限公司 | Multi-frequency antenna and frequency-selecting phase-shifting module thereof |
| CN115020945B (en) * | 2022-06-22 | 2024-04-16 | 京信通信技术(广州)有限公司 | Multi-frequency antenna and frequency-selecting phase-shifting module thereof |
| CN116073583A (en) * | 2023-03-07 | 2023-05-05 | 中兴通讯股份有限公司 | Electric tuning antenna downward inclination angle adjusting device and electric tuning antenna system |
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