CN102738554B - Mobile miniature antenna servo system - Google Patents
Mobile miniature antenna servo system Download PDFInfo
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- CN102738554B CN102738554B CN201210224659.6A CN201210224659A CN102738554B CN 102738554 B CN102738554 B CN 102738554B CN 201210224659 A CN201210224659 A CN 201210224659A CN 102738554 B CN102738554 B CN 102738554B
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Abstract
The invention discloses a mobile miniature antenna servo system, which comprises an antenna elevation device, an azimuth driving device, a horizontal adjustment platform and a support accessory. During erection, the horizontal adjustment platform is firstly fixed on a tripod of the support accessory, then a mounting support in integrated equipment of the antenna elevation device and the azimuth driving device is fixed on the horizontal adjustment platform, and finally an external connection cable is connected, so that the erection of the mobile miniature antenna servo system is completed. The mobile miniature antenna servo system has the advantages of small size, light weight and convenience in erection, dismounting, storage and carrying.
Description
Technical field
The present invention relates to antenna servo system, be specifically related to a kind of moving miniature antenna servo system.
Background technology
Application is very extensive in radiation with in receiving electromagnetic wireless device for antenna servo system, is mainly used in the association areas such as broadcast, communication, astronomy, meteorology, navigation, Aeronautics and Astronautics, national defence.According to its purposes and maneuverability requirement, antenna servo system can be divided into fixed and portable two large classes.Movable antenna servo system is not to be fixed on a certain place in use always, but needs often movement, dismantle, carries and set up.Therefore, to movable antenna servo system, not only require its volume little, lightweight, and the time agility that it is set up and is dismantled and convenience also have harsher requirement.
For moving miniature antenna servo system, except meeting requirement on electric performance, also must meet mechanical performance, also should be convenient to safeguard simultaneously, set up, unmarshaling and bearing.Meet mechanical performance and require to guarantee that antenna servo system should have enough strength and stiffness, be convenient to set up with unmarshaling and require antenna servo system lightweight, volume is little, can rapid-assembling/disassembling.
Along with the development of modern microwave mechanics of communication, on the one hand require the precision of antenna servo system more high better, require on the other hand the weight of antenna servo system in the stability of the system of assurance and reliability more gently better; And the feature that adopts the antenna servo system that obtains of traditional design method be physical dimension with weight all large, set up and comparatively complexity of unmarshaling.
Summary of the invention
The technical problem to be solved in the present invention be to provide be a kind ofly convenient to set up, unmarshaling and the moving miniature antenna servo system born.
Moving miniature antenna servo system of the present invention, comprises antenna pitching device, azimuth drive, horizontal adjusting The Cloud Terrace and Holder Fasteners, wherein:
Described Holder Fasteners comprises bracing frame and cable;
Described azimuth drive comprises that bottom is for uncovered upper shell and lower house, and the bottom of described upper shell is fixedly connected with the top of lower house; In lower house, be provided with mounting bracket, this mounting bracket is installed on by horizontal adjusting The Cloud Terrace on the bracing frame of described Holder Fasteners, azimuth axis is installed on mounting bracket, this azimuth axis stretches in upper shell through lower house, on azimuth axis, be set with successively floating bearing and collector ring, the top of azimuth axis is connected with azimuth encoder by coupling; The interior ring of described floating bearing is fixedly connected with the ring flange being fixed on lower house, on the outer shroud of floating bearing, is set with azimuth gear, and described azimuth gear and the outer shroud of floating bearing are fixed on mounting bracket by securing member; Motor reducer all-in-one and control circuit board are installed on lower house, on the output shaft of described motor reducer all-in-one, by flat key, are connected a gear is housed, this gear is meshed with aforesaid azimuth gear after axle head carries out axial restraint by baffle plate; The rotor of described collector ring is connected with collector ring support, and this collector ring support is fixed on lower house, and the rotor of described azimuth encoder is connected with azimuth encoder support, and described azimuth encoder support is fixedly connected on collector ring support;
Described antenna pitching device comprises a framework, and the lower end of framework has one to the inner recessed opening of framework, and described azimuth drive is placed in above-mentioned opening; In framework, be provided with electric pushrod, the first pitch axis, the second pitch axis and pitching encoder, the push rod that wherein forms electric pushrod is connected with one end of the first pitch axis by crank, and the other end of described the first pitch axis stretches in the upper shell of azimuth drive and is fixed on the inwall of upper shell through framework; Described the second pitch axis is arranged on framework and keeps coaxial with the relative position place of the first pitch axis setting position and with the first pitch axis, its one end is fixed on the inwall of upper shell of azimuth drive, and the other end is connected with pitching encoder by coupling with framework through upper shell; The rotor of described pitching encoder is connected with pitching encoder support, and this pitching encoder support is fixed on described framework.
In the azimuth drive of technique scheme, preferably on described mounting bracket, offer mounting groove, then the pressing plate of a covering mounting groove is installed on mounting bracket, then azimuth axis is installed on this pressing plate, to facilitate the installation of floating bearing and ring flange.
In the azimuth drive of technique scheme, can also on the upper surface of upper shell, offer manhole with the corresponding position of motor reducer all-in-one installation site, and install cover plate on manhole, thereby facilitate the maintenance of motor reducer all-in-one.
In the azimuth drive of technique scheme, in order to keep the each parts in lower house not to be subject to dust storm etch, can bottom plate be set in the bottom of lower house, described bottom plate is fixedly connected with lower house, preferably between installs a sealing plate additional, to play good sealing effectiveness; On bottom plate, offer a through hole, matched in clearance between described through hole and mounting bracket, so that mounting bracket both can pass through from this through hole, can protect again the each parts in lower house not to be subject to dust storm etch to greatest extent.
In the antenna pitching device of technique scheme, preferably in framework inside, be provided with several for erection unit as the support plate of electric pushrod etc., the push rod in electric pushrod is wherein installed on one of them support plate by rocker bar bearing.
In technique scheme, described bracing frame is generally tripod.Described control circuit board is mainly the various motions that control antenna framework carries out orientation and pitching.
Described upper shell, lower house and framework all adopts aluminum alloy materials to make.
In technique scheme, described horizontal adjusting The Cloud Terrace comprises a mounting panel, on mounting panel, be installed with three adjusting screw(rod)s, each adjusting on Gay bar is equipped with upper and lower adjusting nut, and the mounting bracket in described azimuth drive is installed on described adjusting screw(rod) and by adjusting upper and lower adjusting nut, system is up to the standard; Be preferably between each adjusting screw(rod) and mounting panel gusset is set, to strengthen the rigidity of horizontal adjusting The Cloud Terrace.
Compared with prior art, feature of the present invention is:
1, it is integrated that azimuth drive adopts motor reducer all-in-one, floating bearing and transmission device, weight reduction and reduce volume to greatest extent, and transmission accuracy is high, transmission is stablized, output torque is large, noise is little, reliability is high;
2, upper and lower casing adopts aluminium alloy plate to process, and can bear larger gravity, all has access panel in several orientation simultaneously, is convenient to install, dismantles and maintenance;
3, servomechanism and control circuit are all integrated in azimuth drive, and integrated level is high, reduce external interface cable count, have not only alleviated weight, and have improved the stability of system;
4, azimuth encoder and pitching encoder are directly loaded on azimuth axis and pitch axis respectively, have saved the anti-backlash mechanism of a set of complexity, carrying the high-precision while, reduce to greatest extent the volume of system, the weight of mitigation system.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of execution mode of moving miniature servo system of the present invention;
Fig. 2 is the structural representation that in Fig. 1 illustrated embodiment, antenna pitching device is opened bonnet;
Fig. 3 is the structural representation of azimuth drive in Fig. 1 illustrated embodiment;
Fig. 4 is the cutaway view of horizontal adjusting The Cloud Terrace in Fig. 1 illustrated embodiment;
Fig. 5 is the vertical view of horizontal adjusting The Cloud Terrace in Fig. 1 illustrated embodiment.
Number in the figure is:
1 antenna pitching device; 2 azimuth drives; 3 horizontal adjusting The Cloud Terraces; 4 Holder Fasteners; 5 pitching encoders; 6 pitching encoder supports; 7 couplings; 8 second pitch axis; 9 rocker bar bearings; 10 frameworks; 11 electric pushrods; 12 cranks; 13 first pitch axis; 14 support plates; 15 pressing plates; 16 azimuth axis; 17 linings; 18 azimuth gears; 19 baffle plates; 20 gears; 21 sealing plates; 22 lower houses; 23 ring flanges; 24 upper shells; 25 motor reducer all-in-ones; 26 upper cover plates; 27 azimuth encoders; 28 mounting brackets; 29 locking nuts; 30 azimuth encoder supports; 31 collector rings; 32 collector ring supports; 33 control circuit boards; Outer shroud on 34; 35 interior rings; 36 steel balls; 37 bottom plates; 38 times outer shrouds; 39 installing holes; 40 adjusting screw(rod)s; Adjusting nut on 41; 42 times adjusting nuts; 43 gussets; 44 mounting panels.
Embodiment
As shown in Fig. 1～5, moving miniature antenna servo system of the present invention, comprises antenna pitching device 1, azimuth drive 2, horizontal adjusting The Cloud Terrace 3 and Holder Fasteners 4, wherein:
Described Holder Fasteners 4 comprises tripod and cable etc.;
Specifically as shown in Figure 3, it comprises that bottom is uncovered upper shell 24 and lower house 22 to described azimuth drive 2, by aluminum alloy materials, is made, and the bottom of described upper shell 24 is fixedly connected with the top of lower house 22, in lower house 22, be provided with mounting bracket 28, this mounting bracket 28 is installed on by horizontal adjusting The Cloud Terrace 3 on the tripod of described Holder Fasteners 4, on mounting bracket 28, offer a mounting groove and three installing holes 39, the pressing plate 15 of one this mounting groove of covering is installed on mounting bracket 28, on this pressing plate 15, azimuth axis 16 is installed, described azimuth axis 16 passes lower house 22 and stretches in upper shell 24, on azimuth axis 16, from the one end near pressing plate 15, start to be set with successively floating bearing and collector ring 31, the top of azimuth axis 16 is connected with azimuth encoder 27 by coupling 7, described floating bearing is mainly comprised of interior ring 35, outer shroud, steel ball 36 and lining 17, its outer-loop is comprised of upper outer shroud 34 and lower outer shroud 38, steel ball 36 lays respectively between interior ring 35 and upper outer shroud 34 and interior ring 35 and lower outer shroud 38, described lining 17 is placed between outer shroud 34 and lower outer shroud 38, and three is bolted on together, the interior ring 35 of floating bearing is fixedly connected with the ring flange 23 being fixed on lower house 22, is set with azimuth gear 18 on the outer shroud of floating bearing, and the outer shroud of described azimuth gear 18 and floating bearing is fixed on mounting bracket 28 by securing member, in upper shell 24 inside, be provided with motor reducer all-in-one 25 and control circuit board 33, concrete, motor reducer all-in-one 25 and control circuit board 33 are separately fixed on the lower house 22 of azimuth axis 16 both sides, the output shaft of described motor reducer all-in-one 25 is connected a gear 20 is housed by flat key, and this gear 20 is meshed with aforesaid azimuth gear 18 after axle head carries out axial restraint by baffle plate 19, the rotor portion of described collector ring 31 is connected with collector ring support 32, and this collector ring support 32 is fixed on lower house 22, and the stationary part of collector ring 31 is connected with azimuth axis 16, in the end of collector ring 31, with locking nut 29, collector ring 31 is axially fastened, the rotor portion of described azimuth encoder 27 is connected with azimuth encoder support 30, and this azimuth encoder support 30 is fixedly connected on collector ring 31 supports, with the rotor portion that guarantees azimuth encoder 27 and collector ring 31, is synchronized with the movement, on the upper surface of upper shell 24, offer manhole with the corresponding position of motor reducer all-in-one 25 installation sites, on manhole, install cover plate 26, thereby facilitate the maintenance of motor reducer all-in-one 25, in the bottom of lower house 22, bottom plate 37 is set, described bottom plate 37 is fixedly connected with lower house 22, between bottom plate 37 and lower house 22, sealing plate 21 is housed, to play good sealing effectiveness, in the middle of bottom plate 37, offer a through hole, matched in clearance between this through hole and mounting bracket 28, makes azimuth drive 2 become the entirety of a relative closure, plays the effect of waterproof and dustproof, sand prevention and anti-salt fog,
Described antenna pitching device 1 specifically as shown in Figure 2, it comprises the framework that an aluminum alloy material is made, described framework is comprised of framework 10 and bonnet, the lower end of framework 10 has one to the inner recessed oblong openings of framework 10, described azimuth drive 2 is placed in this opening, does not have to be installed with antenna in the one side of opening on framework 10; In framework 10 inside, be provided with several support plates 14 for erection unit (as electric pushrod 11 etc.), in framework 10, be also provided with electric pushrod 11, the first pitch axis 13, the second pitch axis 8 and pitching encoder 5, described electric pushrod 11 is installed on a support plate 14 in framework 10 by rocker bar bearing 9, the push rod that wherein forms electric pushrod 11 is connected with one end of the first pitch axis 13 by crank 12, and the other end of this first pitch axis 13 passes framework 10, and to stretch into the upper shell 24 of azimuth drive 2 interior and be fixed on the inwall of this upper shell 24; Described the second pitch axis 8 be arranged at on framework 10 with the first pitch axis 13 fixed positions relative position keep coaxial with the first pitch axis 13, its one end is fixed on the inwall of upper shell 24 of azimuth drive 2, and the other end passes upper shell 24 and by coupling 7, is connected with pitching encoder 5 after framework 10; The rotor portion of described pitching encoder 5 is connected with pitching encoder support 6, and this pitching encoder support 6 is fixed on described framework 10, between described the first pitch axis 13 and framework 10, all connect by bearing between the second pitch axis 8 and framework 10;
Described horizontal adjusting The Cloud Terrace 3 as shown in Figures 4 and 5, comprise a mounting panel 44, this mounting panel 44 is fixed on tripod by screw rod, nut, on mounting panel 44, be installed with three adjusting screw(rod)s 40, on each adjusting screw(rod) 40, be equipped with adjusting nut 41 and lower adjusting nut 42, the mounting bracket 28 in described azimuth drive 2 is installed on described adjusting screw(rod) 40 and is made antenna pitching device 1 and azimuth drive 2 equipment integratings in level by adjusting upper adjusting nut 41 and lower adjusting nut 42 by the installing hole 39 on it; Be preferably between each adjusting screw(rod) 40 and mounting panel 44 gusset 43 is set, to strengthen the rigidity of horizontal adjusting The Cloud Terrace 3.
During concrete making, normally antenna pitching device 1 and azimuth drive 2 are first assembled into one, when setting up, first the mounting panel in horizontal adjusting The Cloud Terrace 3 44 is placed on tripod, fix with screw rod and nut check, take off afterwards the upper adjusting nut 41 on each adjusting screw(rod) 40 in horizontal adjusting The Cloud Terrace 3, then the installing hole 39 on the mounting bracket 28 in antenna pitching device 1 and azimuth drive 2 equipment integratings is placed on the adjusting screw(rod) 40 of horizontal adjusting The Cloud Terrace 3, then pack two upper adjusting nuts 41 that unload into, by adjusting the height of lower adjusting nut 42, system (antenna pitching device 1 and azimuth drive 2 equipment integratings) is up to the standard, again upper adjusting nut 41 is locked, realization is fastening to antenna pitching device 1 and azimuth drive 2 equipment integratings, finally external stube cable is connected, complete setting up of moving miniature servo system of the present invention.
Unmarshaling process is contrary with erection process, first take off external stube cable, then take off the upper adjusting nut 41 on each adjusting screw(rod) 40, then antenna pitching device 1 and azimuth drive 2 equipment integratings can be taken off, again horizontal adjusting The Cloud Terrace 3 is taken off, finally upper adjusting nut 41 is reinstalled on each adjusting screw(rod) 40, complete the unmarshaling of moving miniature servo system of the present invention.Bear and be divided into two parts: first antenna pitching device 1 and azimuth drive 2 equipment integratings are put in a knapsack, then horizontal adjusting The Cloud Terrace 3 and Holder Fasteners 4 are put in another knapsack, finally two knapsacks are tightened together, complete bearing of moving miniature servo system of the present invention.
When work, the operation principle of azimuth drive 2 is as follows:
After energising, motor reducer all-in-one 25 starts, driven gear 20 moves, because gear 20 and azimuth gear 18 are meshed, and azimuth gear 18 is all fixed on mounting bracket 28 with the outer shroud of floating bearing, the outer shroud of floating bearing and azimuth gear 18 are all motionless, and therefore gear 20 is rotated around azimuth gear 18; And motor reducer all-in-one 25 is fixed on lower house 22, lower house 22 is connected with upper shell 24 again, and ring flange 23 one end are fixed on lower house 22, the other end is fixed on the interior ring 35 of floating bearing, due to the motion of gear 20, make ring 35 motions in floating bearing, drive upper shell 24, lower house 22 to move, and upper shell 24 is connected with antenna pitching device 1, and then drive the antenna frame 10 of antenna pitching device 1 to carry out 360 °, orientation to rotatablely move.
The operation principle of antenna pitching device 1 is as follows:
After energising, the electric motor starting of composition electric pushrod 11, by rocker bar bearing 9, make the push rod of electric pushrod 11 carry out straight reciprocating motion, by crank 12, make rectilinear motion be transformed into angular movement, because one end of the first pitch axis 13 and the second pitch axis 8 is individually fixed on the both sides inwall of upper shell 24 of azimuth drive 2, therefore the first pitch axis 13 and the second pitch axis 8 are fixed when elevating movement; And by bearing, connect between the first pitch axis 13, the second pitch axis 8 and framework 10, therefore, when crank 12 moves, by the bearing of both sides, make framework 10 carry out elevational movement around a pitch axis 13 and the second pitch axis 8, coupling 7 is connected the stator of pitching encoder 5 and the second pitch axis 8, and the rotor portion of pitching encoder 5 is fixed on framework 10 by pitching encoder support 6, with framework 10, is synchronized with the movement.
Claims (9)
1. a moving miniature antenna servo system, comprises antenna pitching device (1), azimuth drive (2), horizontal adjusting The Cloud Terrace (3) and Holder Fasteners (4), it is characterized in that:
Described Holder Fasteners (4) comprises bracing frame and cable;
Described azimuth drive (2) comprises that bottom is uncovered upper shell (24) and lower house (22), and the bottom of described upper shell (24) is fixedly connected with the top of lower house (22); in lower house (22), be provided with mounting bracket (28), this mounting bracket (28) is installed on the bracing frame of described Holder Fasteners (4) by horizontal adjusting The Cloud Terrace (3), azimuth axis (16) is installed on mounting bracket (28), this azimuth axis (16) stretches in upper shell (24) through lower house (22), on azimuth axis (16), be set with successively floating bearing and collector ring (31), the top of azimuth axis (16) is connected with azimuth encoder (27) by coupling (7), the interior ring (35) of described floating bearing is fixedly connected with the ring flange (23) being fixed on lower house (22), on the outer shroud of floating bearing, be set with azimuth gear (18), described azimuth gear (18) and the outer shroud of floating bearing are fixed on mounting bracket (28) by securing member, motor reducer all-in-one (25) and control circuit board (33) are installed on lower house (22), on the output shaft of described motor reducer all-in-one (25), by flat key, connected a gear (20) is housed, this gear (20) is meshed with aforesaid azimuth gear (18) after axle head carries out axial restraint by baffle plate (19), the rotor of described collector ring (31) is connected with collector ring support (32), this collector ring support (32) is fixed on lower house (22), the rotor of described azimuth encoder (27) is connected with azimuth encoder support (30), and described azimuth encoder support (30) is fixedly connected on collector ring support (32),
Described antenna pitching device (1) comprises a framework (10), the lower end of framework (10) has one to the inner recessed opening of framework (10), and described azimuth drive (2) is placed in above-mentioned opening; In framework (10), be provided with electric pushrod (11), the first pitch axis (13), the second pitch axis (8) and pitching encoder (5), the push rod that wherein forms electric pushrod (11) is connected with one end of the first pitch axis (13) by crank (12), and the other end of this first pitch axis (13) passes framework (10), and to stretch into the upper shell (24) of azimuth drive (2) interior and be fixed on the inwall of upper shell (24); Described the second pitch axis (8) is arranged at framework (10) and above with the opposite position of the first pitch axis (13) setting position and with the first pitch axis (13), keeps coaxial, its one end is fixed on the inwall of upper shell (24) of azimuth drive (2), and the other end is connected with the stator of pitching encoder (5) by coupling (7) with framework (10) through upper shell (24); The rotor of described pitching encoder (5) is connected with pitching encoder support (6), and this pitching encoder support (6) is fixed on described framework (10).
2. moving miniature antenna servo system according to claim 1, it is characterized in that: in azimuth drive (2), on described mounting bracket (28), offer mounting groove, the pressing plate (15) that covers described mounting groove is installed on mounting bracket (28), and described azimuth axis (16) is installed on this pressing plate (15).
3. moving miniature antenna servo system according to claim 1, it is characterized in that: in azimuth drive (2), on the upper surface of upper shell (24), have manhole with the corresponding position of motor reducer all-in-one (25) installation site, upper cover plate (26) is installed on described manhole.
4. moving miniature antenna servo system according to claim 1, it is characterized in that: in azimuth drive (2), the bottom of described lower house (22) is provided with bottom plate (37), on bottom plate (37), offer through hole, matched in clearance between described through hole and mounting bracket (28).
5. moving miniature antenna servo system according to claim 1, it is characterized in that: in antenna pitching device (1), in framework (10) inside, be provided with several support plates for erection unit (14), the push rod of described composition electric pushrod (11) is installed on one of them support plate (14) by rocker bar bearing (9).
6. according to the moving miniature antenna servo system described in any one in claim 1～5, it is characterized in that: described bracing frame is tripod.
7. according to the moving miniature antenna servo system described in any one in claim 1～5, it is characterized in that: described upper shell (24), lower house (22) and framework (10) all adopts aluminum alloy materials to make.
8. according to the moving miniature antenna servo system described in any one in claim 1～5, it is characterized in that: horizontal adjusting The Cloud Terrace (3) comprises a mounting panel (44), on mounting panel (44), be installed with three adjusting screw(rod)s (40), each adjusting on Gay bar is equipped with upper and lower adjusting nut (41,42), and the mounting bracket (28) in described azimuth drive (2) is installed on described adjusting screw(rod) (40) and goes up and descend adjusting nut (42) that system is up to the standard by adjustment.
9. moving miniature antenna servo system according to claim 8, is characterized in that: between each adjusting screw(rod) (40) and mounting panel (44), be connected with gusset (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210224659.6A CN102738554B (en) | 2012-07-02 | 2012-07-02 | Mobile miniature antenna servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210224659.6A CN102738554B (en) | 2012-07-02 | 2012-07-02 | Mobile miniature antenna servo system |
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| CN102738554A CN102738554A (en) | 2012-10-17 |
| CN102738554B true CN102738554B (en) | 2014-04-23 |
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| CN201210224659.6A Expired - Fee Related CN102738554B (en) | 2012-07-02 | 2012-07-02 | Mobile miniature antenna servo system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104134868B (en) * | 2014-07-16 | 2016-08-24 | 北京无线电测量研究所 | A kind of Two Dimensional Rotating servo control mechanism |
| CN104793514A (en) * | 2015-02-10 | 2015-07-22 | 桂林长海发展有限责任公司 | Photoelectric servo device for ground monitoring system |
| CN105179889A (en) * | 2015-07-31 | 2015-12-23 | 天津止戈防务技术有限公司 | Portable radar calibration single-shaft rotary table device |
| CN105161851B (en) * | 2015-08-18 | 2018-10-19 | 沈阳航空航天大学 | manual antenna alignment device and method applied to radar simulator calibration process |
| CN105959831A (en) * | 2016-06-22 | 2016-09-21 | 北方信息控制集团有限公司 | Beidou regional base station pawl mark |
| CN106500590A (en) * | 2016-12-15 | 2017-03-15 | 宁夏共享模具有限公司 | A kind of laser interferometer interferoscope adjusts platform |
| CN108802119B (en) * | 2018-05-30 | 2023-10-20 | 中国科学院东北地理与农业生态研究所 | Free space wave method measuring device |
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| US5576722A (en) * | 1994-09-13 | 1996-11-19 | The United States Of America As Represented By The Secretary Of The Army | Mobile satellite antenna base and alignment apparatus |
| CN201004181Y (en) * | 2006-04-25 | 2008-01-09 | 国家无线电频谱管理研究所 | All-weather omnidirectional servo structure |
| CN201417819Y (en) * | 2009-05-07 | 2010-03-03 | 北京中星讯达科技有限公司 | Antenna receiving and tracking system for mobile carrier satellite |
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