CN102714354A - Device for adjusting downtilt angle of electrical downtilt antenna - Google Patents
Device for adjusting downtilt angle of electrical downtilt antenna Download PDFInfo
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- CN102714354A CN102714354A CN2011800022611A CN201180002261A CN102714354A CN 102714354 A CN102714354 A CN 102714354A CN 2011800022611 A CN2011800022611 A CN 2011800022611A CN 201180002261 A CN201180002261 A CN 201180002261A CN 102714354 A CN102714354 A CN 102714354A
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- declination
- angle
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- gear
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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
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Abstract
The invention embodiments disclose a device for adjusting a downtilt angle of an electrical downtilt antenna and the device comprises a driving device used for driving at least one phase shifter to move to realize the adjustment of the downtilt angle of the electrical downtilte antenna, and a downtilt angle displaying device which is coupled to the driving device, wherein the downtilt angle displaying device is used to indicate a state of downtilt angle variation generated by the phase shifter being driven by the driving device through digital display or a machinery rotating method. The invention embodiments effectively reduce the packaging size of an antenna, and saves package and transportation costs.
Description
Technical field
The present invention relates to the communication equipment technical field, particularly a kind of electrical down-tilting antenna angle of declination adjusting device.
Background technology
In the mobile radio communication engineering design, should come reasonably to select antenna for base station according to the actual conditions such as covering requirement, telephone traffic distribution, anti-interference requirement and network service quality of network.Usually after antenna for base station is selected, also need adjust, with the overlay area of adjustment antenna for base station signal to the angle of declination of antenna for base station.
Downtilt rationally is set not only can reduces the influence of disturbing with frequently, effectively control the coverage of base station and the soft-switch proportion (as far as cdma network) of whole net, and can strengthen the signal strength signal intensity in this base station overlay area.Usually two aspects that are set with of Downtilt stress, and promptly lay particular emphasis on to disturb to suppress and lay particular emphasis on to strengthen covering.This two aspect stresses corresponding different respectively angle of declination algorithms.Generally speaking, should lay particular emphasis on consideration to the intensive area of base station distribution and disturb inhibition, the more sparse area of base station distribution then lays particular emphasis on considers to strengthen covering.
At present, the Downtilt that usually adopts be adjusted into mechanical tilt and two kinds of adjustment modes of electrical tilt.
Mechanical tilt is physically downward-sloping antenna, disturbs reduction though adopt this technology also can make with frequency, owing to adopt physics to have a down dip, its construction and maintenance very bother, and the precision lower (stepping accuracy is 1 °) at its adjustment inclination angle.Because tilt angled down is the theoretical value and the theoretical optimal value of analog computation software certain deviation is arranged in addition.In the network adjustment, must elder generation be shut down by base station system, can not in adjustment day line process, monitoring simultaneously adjust effect, can not carry out meticulous adjustment to network.
The principle of electrical tilt is through changing the phase place of conllinear array antenna oscillator, change the amplitude size of vertical component and horizontal component, changing synthetic component field intensity intensity, thereby the vertical directivity pattern of antenna is had a down dip.Because the field intensity intensity of antenna all directions increases simultaneously and reduces; Guarantee changing inclination angle aft antenna directional diagram variation not quite; The main lobe direction coverage distance is shortened, and the while makes whole directional pattern in the Serving cell sector, reduce area coverage again but does not produce interference.Facts have proved, the electric melody aerial lower inclination angle degree when 1 °-5 ° change, its antenna pattern and mechanical antenna roughly the same; When tilt angled down when 5 °-10 ° change, the more mechanical antenna of its antenna pattern improvement arranged slightly; When tilt angled down when 10 °-15 ° change, the variation of the more mechanical antenna of its antenna pattern is bigger; After 15 ° of mechanical antenna downtilt, the obvious difference of the more mechanical antenna of its antenna pattern, at this moment antenna pattern shape changes little; The main lobe direction coverage distance obviously shortens, and the entire antenna directional diagram all in this base station section, increases tilt angled down; The sector area coverage is dwindled, but do not produce interference, such directional diagram is our needs; Therefore adopt electrical tilt antenna can reduce call loss, reduce to disturb.
As depicted in figs. 1 and 2; Electrical down-tilting antenna is a development trend of antenna industry; The angle of declination of electrical down-tilting antenna is to regulate through the phase place that the drive device drives phase shifter changes from input to each unit, and wherein angle of declination shows different readings through the scale bar 101 or the like of band scale with rectilinear motion mode.But, not rainproof, the snow of exposed scale bar 101, especially sleet, snow ice can freeze scale bar 101, influence electric conditioning function.For fear of above-mentioned defective; Usually add scale bar protective jacket 102 at scale bar 101 at present; But; Can cause antenna length to increase, increase package length, increase freight and increase the operating space when upward the tower string is adorned the risk (stretching out the risk that long existence is miscued because of head protector when going up the tower crane dress) of collision and influenced project installation simultaneously.
Therefore, how to reduce the antenna packaging volume, save packing cost and cost of transportation, improve installation reliability, become the important technological problems that those skilled in the art need to be resolved hurrily.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of electrical down-tilting antenna angle of declination adjusting device, can reduce the antenna packaging volume, saves packing cost and cost of transportation, improves installation reliability.Its concrete scheme is following:
A kind of electrical down-tilting antenna angle of declination adjusting device comprises:
Drive unit moves to realize the adjustment of electrical down-tilting antenna angle of declination in order to drive at least one phase shifter; And
The angle of declination display unit, said angle of declination display unit and said drive unit are of coupled connections, and are used for showing or the mechanical rotation mode is indicated the changing condition of the angle of declination that said phase shifter produces with the driving of said drive unit through numeral.
Can find out that from above-mentioned technical scheme the disclosed a kind of electrical down-tilting antenna angle of declination adjusting device of the embodiment of the invention drives phase shifter through the drive unit outputting power and moves to realize the adjustment of electrical down-tilting antenna angle of declination.The angle of declination display unit shows through numeral or the mechanical rotation mode is indicated the changing condition of the angle of declination that said phase shifter produces with the driving of drive unit.The angle of declination display unit that the disclosed numeral of the embodiment of the invention shows or the mechanical rotation mode is indicated has reduced the antenna packaging volume effectively, has saved packing cost and cost of transportation.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of existing angle of declination display unit;
Fig. 2 is provided with the structural representation of the angle of declination display unit of scale bar protective jacket for existing button;
Fig. 3 is the structural representation after the disclosed electrical down-tilting antenna angle of declination of embodiment of the invention adjusting device removes axial push-pull device at fixed;
Fig. 4 is the structural representation of the disclosed angle of declination display unit of the embodiment of the invention;
Fig. 5 is the structural representation of the disclosed a kind of electrical down-tilting antenna angle of declination adjusting device of the embodiment of the invention;
Fig. 6 is adjusted to the structural representation of the electrical down-tilting antenna angle of declination adjusting device after the minimum for the disclosed angle of declination of the embodiment of the invention;
Fig. 7 is adjusted to the structural representation of the angle of declination display unit after the minimum for the disclosed angle of declination of the embodiment of the invention;
Fig. 8 is the structural representation of the electrical down-tilting antenna angle of declination adjusting device in the disclosed angle of declination adjustment process of the embodiment of the invention;
Fig. 9 is the structural representation of the angle of declination display unit in the disclosed angle of declination adjustment process of the embodiment of the invention;
Figure 10 is adjusted to the structural representation of the electrical down-tilting antenna angle of declination adjusting device after the maximum for the disclosed angle of declination of the embodiment of the invention;
Figure 11 is adjusted to the structural representation of the angle of declination display unit after the maximum for the disclosed angle of declination of the embodiment of the invention.
Embodiment
The embodiment of the invention discloses a kind of electrical down-tilting antenna angle of declination adjusting device, it can reduce the antenna packaging volume, saves packing cost and cost of transportation, improves installation reliability.
The disclosed a kind of electrical down-tilting antenna angle of declination adjusting device of the embodiment of the invention; Comprise: drive unit; Move to realize the adjustment of electrical down-tilting antenna angle of declination in order to drive at least one phase shifter, promptly the drive unit outputting power drives phase shifter and moves the adjustment with realization electrical down-tilting antenna angle of declination;
The angle of declination display unit, described angle of declination display unit be connected said drive unit and be of coupled connections, be used for showing or the mechanical rotation mode is indicated the changing condition of the angle of declination that said phase shifter produces with the driving of said drive unit through numeral.
The disclosed a kind of electrical down-tilting antenna angle of declination adjusting device of the embodiment of the invention drives phase shifter through the drive unit outputting power and moves to realize the adjustment of electrical down-tilting antenna angle of declination.The angle of declination display unit shows through numeral or the mechanical rotation mode is indicated the changing condition of the angle of declination that said phase shifter produces with the driving of said drive unit.The angle of declination display unit that the disclosed numeral of the embodiment of the invention shows or the mechanical rotation mode is indicated has reduced the antenna packaging volume effectively; Packing cost and cost of transportation have been saved; And very useful to antenna end face layout designs and project installation, reliability is high.
Concrete; When the angle of declination display unit is indicated the changing condition of angle of declination through the mechanical rotation mode; It comprises a dial and the pointer that can rotate with respect to said dial, and described dial or described pointer can show the changing condition of the angle of declination that described phase shifter produces with the driving of said drive unit along with the corresponding rotation of the driving of said drive unit with the variation of the relative position through said dial and pointer.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
See also Fig. 3-Fig. 5, Fig. 3 is the structural representation after the disclosed electrical down-tilting antenna angle of declination of embodiment of the invention adjusting device removes axial push-pull device at fixed; Fig. 4 is the structural representation of the disclosed angle of declination display unit of the embodiment of the invention; Fig. 5 is the structural representation of the disclosed a kind of electrical down-tilting antenna angle of declination adjusting device of the embodiment of the invention.
The disclosed driving-chain of the foregoing description can specifically comprise screw rod 4 and axial push-pull device at fixed 9.Wherein, rotary drive unit 6 is arranged on the mount pad, is used for output drive strength, drive screw 4 rotations.Screw rod 4 is supported on the mount pad rotationally, and it links to each other with rotary drive unit 6.Axially push-pull device at fixed 9 is threaded with screw rod 4, and can move axially along screw rod 4, is connected with pull bar 2 on it.In rotary drive unit 6 drive screws 4 rotating process, axially push-pull device at fixed 9 will through changing turning to of rotary drive unit 6, can correspondingly change the moving direction of axial push-pull device at fixed 9 along the moving axially of screw rod 4.Phase shifter 1 links to each other with pull bar 2,, drives phase shifters 1 through pull bar 2 and moves when screw rod 4 moves axially at axial push-pull device at fixed 9, thereby can accomplish the effect of electrical down-tilting antenna angle of declination adjustment.The embodiment of the invention is through adopting the angle of declination display unit of dial plate display scale form; Reduced the antenna packaging volume effectively; Saved packing cost and cost of transportation, and very useful to antenna end face layout designs and project installation, and reliability is high; Especially the frequency range number is many more, and effect is remarkable more.
Angle of declination display unit and screw rod 4 link to each other through transmission device, and stretch in mount pad outward, so that the angle of declination that observation post shows.The angle of declination display unit has rotating part 81 and static needle dial 82.Wherein, rotating part 81 comprises the dial 811 that links to each other with transmission device, and needle dial 82 buttons are located on the dial 811, and link to each other with mount pad.Screw rod 4 can rotate through transmission device driven rotary part 81, make dial 811 rotate then, thereby makes that the corresponding scale on the dial 811 is corresponding with pointer on the needle dial 82, to identify corresponding angle of declination.
It will be understood by those skilled in the art that; Also can needle dial 82 be linked to each other with transmission device; And dial 811 is fixed on mount pad; Screw rod 4 can drive needle dial 82 through transmission device and rotate, thereby makes that the pointer on the needle dial 82 is corresponding with corresponding scale on the dial 811, to identify corresponding angle of declination.(understand be that dial 811 can be arranged on the static needle dial 82 here, and needle dial 822 is arranged on the rotating part 81, as long as needle dial and one of dial are static relatively, and a relative motion, numeral can be selected arbitrarily on both with pointer)
Can know that by foregoing description the disclosed electrical down-tilting antenna angle of declination of embodiment of the invention adjusting device drives screw rod 4 through rotary drive unit 6 outputting powers and rotates, and according to the difference that turns to of screw rod 4, can make axial push-pull device at fixed 9 axially move back and forth along screw rod 4.Along with will driving pull bar 2 and promote phase shifter 1, moving of axial push-pull device at fixed 9 move, to realize the adjustment of corresponding Downtilt.The angle of declination display unit has dial 811 and is located at the needle dial 82 on the dial 811 with button.So in screw rod 4 rotating process; Screw rod 4 can rotate with set rotating speed to drive dial 811 or needle dial 82 by drive transmission; And make needle dial 82 and dial 811 produce relative rotation; Thereby demonstrate scale and the opposite position of the pointer on the needle dial 82 on the dial 811 after screw rod 4 rotates, then the travel displacement of phase shifter 1 is changed into angle of declination and be presented on the angle of declination display unit.
The angle of declination display unit of the disclosed dial plate display scale of embodiment of the invention form has reduced the antenna packaging volume effectively; Saved packing cost and cost of transportation, and very useful to antenna end face layout designs and project installation, and reliability is high; Especially the frequency range number is many more, and effect is remarkable more.
As shown in Figure 5, between rotary drive unit 6 and the screw rod 4 transmission device 7 should be set, to reduce the rotating speed of rotary drive unit 6 outputs, this rotating speed is controlled in the suitable scope.In the present embodiment, transmission device 7 is made up of gear, promptly realizes corresponding speed reducing ratio through gear drive.The output shaft of rotary drive unit 6 is provided with first gear; Screw rod 4 is provided with second gear; First gear and second gears engaged form transmission device 7, and the number of teeth of first gear is less than the number of teeth of second gear, through controlling the gear ratio of first gear and second gear; Control rotary drive unit 6 passes to screw rod 4 rotating speeds, so that this rotating speed is controlled in the OK range.
Above-mentioned transmission device 7 is not limited to gear drive, also can be various deceleration systems such as belt transmissioning mode or chain gear transmission.When geared system is gear drive, also be not limited to the disclosed double reduction mode of the foregoing description, can be multi-stage gear more.
Be presented at accurately on the angle of declination display unit in order the travel displacement of phase shifter 1 to be changed into angle of declination, the transmission device between angle of declination display unit and the screw rod 4 should be able to satisfy corresponding speed reducing ratio requirement, with the accuracy that guarantees that angle of declination shows.In the present embodiment, screw rod 4 is provided with the 3rd gear, and dial 811 is provided with the 4th gear 812, the three gears and the 4th gear 812 meshes with the formation transmission device, and the number of teeth of the 3rd gear is less than the number of teeth of the 4th gear.Through controlling the gear ratio of the 3rd gear and the 4th gear 812, control screw rod 4 passes to dial 811 rotating speeds, so that this rotating speed is controlled in the OK range, guarantees to show correct angle of declination.
Above-mentioned transmission device is not limited to gear drive, also can be various deceleration systems such as belt transmissioning mode or chain gear transmission.When geared system is gear drive, also be not limited to the disclosed double reduction mode of the foregoing description, can be multi-stage gear more.
As shown in Figure 4, in order further to optimize the disclosed technical scheme of the foregoing description, in the present embodiment, needle dial 82 comprises housing and transparent plate 821.Wherein, housing is used for realizing being connected with mount pad.The transparent plate 821 that is arranged on the housing then is used to protect dial 811, avoided dial 811 to receive the influence of external environment after, can't rotate or rotate insensitive and electric conditioning function.Transparent plate 821 is oppositely arranged with dial 811; Transparent plate 821 is provided with pointer 822, and under initial condition, pointer 822 is corresponding with 0 scale on the dial 811; After dial 811 rotates, then indicate corresponding tilt angled down, pointer 822 corresponding scales are tilt angled down.
But the housing of needle dial 82 is connected through screw with mount pad, promptly on housing, is provided with the installing hole that a plurality of confession screws pass uniformly, and installing hole is arranged on the mounting ear of housing outer peripheral face.Promptly on the outer peripheral face of housing, be provided with a plurality of mounting ears uniformly, and on each mounting ear, all offer the installing hole that supplies screw to pass.
In order to improve the stability that pull bar 2 slides, mount pad is provided with slide 3, and pull bar 2 is slidingly matched with slide 3.Slide 3 can be the hood type structure, and card fits over the both sides of pull bar 2, makes pull bar 2 to slide along axis direction wherein, and has improved the stability that pull bar 2 supports.
Screw rod 4 is provided with sliding bearing 5 near an end of rotary drive unit 6, and promptly this end supports through sliding bearing 5, and the other end then supports through pull bar 2 and axial push-pull device at fixed 9.Mount pad is provided with and stops axial push-pull device at fixed 9 to continue the limit base that moves; Limit base and sliding bearing 5 have been stipulated the travel range of axial push-pull device at fixed 9; Promptly move to respectively when contacting with sliding bearing 5 with limit base at axial push-pull device at fixed 9; Then can't continue to move, stipulate the travel range of phase shifter 1 then.
Axially an end of push-pull device at fixed 9 has the internal thread that cooperates with the external screw thread of screw rod 4, and the other end is sleeved on the pull bar 2, and passes through screw on pull bar 2.
See also Fig. 6 and Fig. 7, Fig. 6 is adjusted to the structural representation of the electrical down-tilting antenna angle of declination adjusting device after the minimum for the disclosed angle of declination of the embodiment of the invention; Fig. 7 is adjusted to the structural representation of the angle of declination display unit after the minimum for the disclosed angle of declination of the embodiment of the invention.
See also Fig. 8 and Fig. 9, Fig. 8 is the structural representation of the electrical down-tilting antenna angle of declination adjusting device in the disclosed angle of declination adjustment process of the embodiment of the invention; Fig. 9 is the structural representation of the angle of declination display unit in the disclosed angle of declination adjustment process of the embodiment of the invention.
When axially push-pull device at fixed 9 is linearly moved to position shown in Figure 8, pointer 822 indications 2 scales, the angle of declination of phase shifter 1 then is 2 degree.The angle of declination of phase shifter 1 is that the rotary movement through dial 811 changes reading.
See also Figure 10 and Figure 11, Figure 10 is adjusted to the structural representation of the electrical down-tilting antenna angle of declination adjusting device after the maximum for the disclosed angle of declination of the embodiment of the invention; Figure 11 is adjusted to the structural representation of the angle of declination display unit after the maximum for the disclosed angle of declination of the embodiment of the invention.
When axially push-pull device at fixed 9 is linearly moved to high order end shown in Figure 10 (axially push-pull device at fixed 9 and limit base position contacting), pointer 822 indications 8 scales, the angle of declination of phase shifter 1 then is 8 degree.The embodiment of the invention is not limited to the situation that maximum range is 8 degree, also can change range ability of the present invention, and change the meter full scale on the dial 811 accordingly through the distance between adjustment limit base and the sliding bearing 5.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (11)
1. an electrical down-tilting antenna angle of declination adjusting device is characterized in that, comprising:
Drive unit moves to realize the adjustment of electrical down-tilting antenna angle of declination in order to drive at least one phase shifter; And
The angle of declination display unit, described angle of declination display unit and said drive unit are of coupled connections, and are used for showing or the mechanical rotation mode is indicated the changing condition of the angle of declination that said phase shifter produces with the driving of said drive unit through numeral.
2. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 1; It is characterized in that; When said angle of declination display unit is indicated the changing condition of angle of declination through the mechanical rotation mode; It comprises a dial and the pointer that can rotate with respect to said dial, and described dial or described pointer can show the changing condition of the angle of declination that described phase shifter produces with the driving of said drive unit along with the corresponding rotation of the driving of said drive unit with the variation of the relative position through said dial and pointer.
3. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 1 is characterized in that said drive unit specifically comprises:
Rotary drive unit (6);
Be supported in the screw rod (4) on the mount pad rotationally, it links to each other with said rotary drive unit (6);
Be threaded with said screw rod (4), and along said screw rod (4) axially movable axial push-pull device at fixed (9), be connected with pull bar (2) on it, said pull bar (2) links to each other with said phase shifter (1).
4. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 3; It is characterized in that; Said angle of declination display unit links to each other through transmission device with said screw rod (4), and stretches in said mount pad outward, and it has dial (811) and button is located at the needle dial (82) on the said dial (811); Said dial (811) links to each other with said transmission device with one of said needle dial (82), and another links to each other with said mount pad.
5. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 3; It is characterized in that; The output shaft of said rotary drive unit (6) is provided with first gear; Said screw rod (4) is provided with second gear, said first gear and said second gears engaged, and the number of teeth of said first gear is less than the number of teeth of said second gear.
6. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 4; It is characterized in that; Said screw rod (4) is provided with the 3rd gear; Said dial (811) is provided with the 4th gear, said the 3rd gear and said the 4th gears engaged, and the number of teeth of said the 3rd gear is less than the number of teeth of said the 4th gear.
7. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 4 is characterized in that, said needle dial (82) comprising:
The housing that is connected with said mount pad;
Be arranged on the said housing, and the transparent plate (821) relative with said dial (811), said transparent plate (821) is provided with pointer (822).
8. like each described electrical down-tilting antenna angle of declination adjusting device of claim 3-7, it is characterized in that said mount pad is provided with slide (3), said pull bar (2) is slidingly matched with said slide (3).
9. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 3 is characterized in that, said screw rod (4) is provided with sliding bearing (5) near an end of said rotary drive unit (6), and said sliding bearing (5) is arranged on the said mount pad.
10. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 3 is characterized in that, said mount pad is provided with and stops said axial push-pull device at fixed (9) to continue the limit base (10) that moves.
11. electrical down-tilting antenna angle of declination adjusting device as claimed in claim 3; It is characterized in that; One end of said axial push-pull device at fixed (9) has the internal thread that cooperates with the external screw thread of said screw rod (4), and the other end is sleeved on the said pull bar (2), and passes through screw on said pull bar (2).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/080344 WO2012149779A1 (en) | 2011-09-29 | 2011-09-29 | Downtilt angle adjustment apparatus for electrically down tilt antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102714354A true CN102714354A (en) | 2012-10-03 |
| CN102714354B CN102714354B (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180002261.1A Active CN102714354B (en) | 2011-09-29 | 2011-09-29 | Device for adjusting downtilt angle of electrical downtilt antenna |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102714354B (en) |
| WO (1) | WO2012149779A1 (en) |
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| US10424843B2 (en) | 2015-09-15 | 2019-09-24 | Cellmax Technologies Ab | Antenna arrangement using indirect interconnection |
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| WO2012149779A1 (en) | 2012-11-08 |
| CN102714354B (en) | 2014-03-12 |
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