CN209389202U - A kind of aerial mounting structure and communication tower - Google Patents
A kind of aerial mounting structure and communication tower Download PDFInfo
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- CN209389202U CN209389202U CN201920396756.0U CN201920396756U CN209389202U CN 209389202 U CN209389202 U CN 209389202U CN 201920396756 U CN201920396756 U CN 201920396756U CN 209389202 U CN209389202 U CN 209389202U
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- support arm
- long support
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- mounting structure
- tower body
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Abstract
The utility model provides a kind of aerial mounting structure and communication tower, is related to technical field of communication equipment, solves the technical issues of co-located multiple systems can not be installed on the same absolute altitude of communication tower.Aerial mounting structure includes tower body and long support arm, and the long support arm has fixing end and free end, and the fixing end is installed on the tower body, and antenna can be installed on the free end；And multiple long support arm radial radiation shapes are distributed at the same absolute altitude of the tower body, the spacing of the adjacent long support arm heaven line meets the horizontal insulated degree requirement between different system antennas.Long support arm structure realizes the possibility that different operators system antenna is installed at same absolute altitude, and also improves the convenience of installation maintenance.
Description
Technical field
The utility model relates to technical field of communication equipment, more particularly, to a kind of aerial mounting structure and communication tower.
Background technique
Multiple systems of co-located construction only share the communal facilitys such as steel tower, computer room, not common circuit between transceiver
Or device, so will not directly collective effect on nonlinear device, fall in the different frequencies on certain mission nonlinear device indirectly
Rate component common intensity is not high, and the new frequency component of generation is fainter, therefore can not consider Intermodulation Interference, and selective analysis is spuious
Interference and obstruction interference, and the AF panel scheme according to the one kind being limited in the two, when analyzing co-located；Due to Base Transmitter
Power is big, receiving sensitivity is high, so mainly considering the interference between base station and base station when multisystem is co-located.
Applicants have discovered that at least there is following technical problem in the prior art:
The antenna of existing communication tower be directly mounted at by fixed device close to the position of tower body, therefore in order to ensure every
Requirement from degree, multiple systems can only point upper and lower level be installed on the different level of communication tower；And due to the day of different operators
Line is installed on different absolute altitudes, needs to carry out operation in different level in installation process, not convenient and fast.
Utility model content
The purpose of this utility model is to provide a kind of aerial mounting structure and communication towers, to solve to exist in the prior art
Co-located multiple systems the technical issues of can not being installed on same absolute altitude.In many technical solutions provided by the utility model
Many technical effects elaboration as detailed below that optimal technical scheme can be generated.
It should be noted that " same absolute altitude " described in present specification includes vertical drop in 1000mm~2000mm
Situation in range.
To achieve the above object, the utility model provides following technical scheme:
A kind of aerial mounting structure provided by the utility model, including tower body and long support arm, the long support arm, which has, to be fixed
End and free end, the fixing end are installed on the tower body, and antenna can be installed on the free end；And multiple long support arms
Radial radiation shape is distributed at the same absolute altitude of the tower body, and the spacing of the adjacent long support arm antenna meets different system antennas
Between horizontal insulated degree requirement.
Optionally, the tower body center line is to the radial distance of the long support arm distal end in 1250mm~2300mm.
Optionally, the long support arm includes walkway board, the bracket to support the walkway board and for installing antenna
Antenna holding pole, the antenna holding pole is fixed on the one end of the walkway board far from the tower body.
Optionally, the detachable end for being installed on the walkway board of the antenna holding pole.
Optionally, the long support arm further includes connecting plate, and the walkway board is fixed on the tower body by the connecting plate.
Optionally, the long support arm is detachable is installed on the tower body.
Optionally, the long support arm includes anchor ear, and the long support arm is installed on the tower by the way that the anchor ear is detachable
Body.
Optionally, the quantity of the long support arm is three, and the horizontal sextant angle of long support arm described in each adjacent two is 120
Degree.
Optionally, the mutiple antennas on same absolute altitude includes three China Mobile, China Unicom and China Telecom operators
Communication system antenna.
A kind of communication tower provided by the utility model, including any of the above aerial mounting structure.
A kind of aerial mounting structure and communication tower provided by the utility model, aerial mounting structure include tower body and draw money on credit
Arm, multiple long support arm radial radiation shapes are distributed at the same absolute altitude of tower body, and the spacing of adjacent long support arm antenna meets not
Horizontal insulated degree requirement between homologous ray antenna is installed at same absolute altitude to realize different operators system antenna
May, and also improve the convenience of installation maintenance.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic perspective view for communication tower that specific embodiment of the present invention provides；
Fig. 2 is the partial enlargement structural representation of communication tower in Fig. 1；
Fig. 3 is the overlooking structure diagram of communication tower in Fig. 1；
Fig. 4 is that walkway board does not install structural schematic diagram under antenna and antenna holding pole state；
Fig. 5 is the outer 120 ° of normal orientation angle scheme of installation of two system antennas；
Fig. 6 is the outer 60 ° of normal orientation angle scheme of installation of two system antennas；
Fig. 7 is antenna parallel arrangement lobe interference schematic diagram；
Fig. 8 is antenna tilt arrangement lobe interference schematic diagram.
1, tower body in figure；2, long support arm；21, walkway board；221, triatic stay；222, lower support bar；23, antenna is embraced
Bar；24, connecting plate；25, anchor ear；3, antenna.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
The utility model provides a kind of aerial mounting structure, including tower body 1 and long support arm 2, and long support arm 2 has fixing end
And free end, fixing end are installed on tower body 1, antenna 3 can be installed on free end；And multiple 2 radial radiation shape of long support arm distributions
At the same absolute altitude of tower body 1, the spacing of adjacent long 2 antenna 3 of support arm meets the horizontal isolation between different system antennas and wants
It asks, meets the requirement of the installation space and isolation between antennas of single-pipe tower tower body installation multi-panel antenna.
Aerial mounting structure includes tower body 1 and long support arm 2, and multiple long 2 radial radiation shapes of support arm are distributed in the same of tower body 1
At absolute altitude, due to being provided with long support arm 2, the spacing of antenna 3 on adjacent long support arm 2 is made to meet the level between different system antennas
Insulated degree requirement to realize the possibility that different operators system antenna 3 is installed at same absolute altitude, and also improves peace
Fill the convenience of maintenance.
Optionally embodiment, the length of long support arm 2 are 1350mm.
Tower body center line to long support arm distal end radial distance range in 1250mm~2300mm, single-pipe tower under normal circumstances
The diameter of tower body is in 500mm~600mm, and the length range of long support arm is in 1000mm~2000mm.
In order to meet the requirement of horizontal isolation, what the length of long support arm 2 needed to guarantee to install on two neighboring long support arm 2
Pitch requirements between different operators system antenna.Specific verification process is as detailed below.
Optionally embodiment, long support arm 2 include walkway board 21, the bracket to support walkway board 21 and are used for
The antenna holding pole 23 of antenna 3 is installed, antenna holding pole 23 is fixed on the one end of walkway board 21 far from tower body 1.
Antenna 3 is mounted on the long one end of support arm 2 far from tower body 1 by antenna holding pole 23, to meet between each system antenna
Pitch requirements, the design of walkway board 21 fully considers the operational safety and comfort of later maintenance personnel, facilitates walking, just
In the installation and maintenance of antenna 3.
Optionally embodiment, the detachable end for being installed on walkway board 21 of antenna holding pole 23.
The detachable mounting means of antenna holding pole 23, convenient for safeguarding and replacement.
Optionally embodiment, long support arm 2 further include connecting plate 24, and walkway board 21 is fixed on tower by connecting plate 24
Body 1.
Walkway board 21 is fixed on tower body 1 by connecting plate 24, and the connecting node of 24 formula of connecting plate makes in-site installation more just
It is prompt.
Optionally embodiment, long support arm 2 is detachable to be installed on tower body 1.
The detachable mounting means of long support arm 2 can carry out transformation and upgrade without filling again on traditional communication tower tower body 1
If communication tower.
Optionally embodiment, long support arm 2 include anchor ear 25, and long support arm 2 is installed on by the way that anchor ear 25 is detachable
Tower body 1.
Long support arm 2 is installed by anchor ear 25, more firm, installation reliability is high.
Optionally embodiment, the quantity of long support arm 2 are three, and the horizontal sextant angle of the long support arm 2 of each adjacent two is equal
It is 120 degree.
The quantity of long support arm 2 is three, and the horizontal sextant angle of the long support arm 2 of each adjacent two is 120 degree, is making full use of peace
The requirement of isolation is ensured while filling space.
Optionally embodiment, the multi-panel antenna on same absolute altitude include China Mobile, China Unicom and China's electricity
Believe three operators communication system antennas.
China Mobile, China Unicom and China Telecom are set (within the scope of the sustained height of tower body 1) at same absolute altitude
Three operators communication system antennas meet three big operators with the requirement of location and isolation, meet current home communications tower letter
Number transmission needs.
As shown in Figures 1 to 4, the utility model provides a kind of communication tower, including any of the above aerial mounting structure.
The multi-panel antenna of different operators communication system is installed at same absolute altitude by communication tower by way of long support arm, each after installation
Horizontal isolation between system antenna can be proved.
Isolation analysis between each system:
In order to avoid different systems interference effect communication quality, the general coupling required between the not dual-mode antenna of homologous ray
Loss is greater than the minimum threshold for occurring to interfere between meeting generation system, which is exactly isolation.In view of different model, factory
Family, batch equipment in AF panel index and filtering performance difference that may be present, essentially according to system mark in planning
Normal value required by standard calculates insulated degree requirement, to guarantee that the equipment for reaching standard requirements can meet under design scenario
It is co-located.
According to the requirement in ETSI (GSM), 3GPP2 (CDMA), 3GPP (WCDMA) and STD28 (PHS) standard, to mesh
The related clutter interference of preceding each major communication system inhibits index to be calculated, according to " communication iron tower technical requirements ", between system
Resultant interference isolation takes clutter interference, blocks the maximum value interfered, in Intermodulation Interference three.To interference and disturbed system
Index see the table below shown.
Table 1 under normal circumstances system interval from degree require (dB)
Note: table isolation value is clutter interference, obstruction interference and Intermodulation Interference maximum value on 1.；
Reference of the table result as isolation of system on 2., since there are equipment index difference, specific isolation is wanted
Asking should be calculated according to the practical index of equipment；
3. table is only used as the input of tower mast technological design, lay should be with actual isolation distance calculated result for antenna on tower
Subject to
One, the calculating of isolation between antennas:
Interference principle between being coexisted between two systems by base station it is found that sent out first from the signal that the power amplifier of interference source base station exports
Filter filtering is sent, is then decayed accordingly because there is certain isolation between two base stations, is finally disturbed base station
Receiver is received.The clutter interference power for reaching the antenna end of interfered base station can indicate are as follows:
Ib=Ptxamp-Iisolation+10*lg (WBinterfered/WBinterfering)
It deforms:
Iisolation=Ptxamp-Ib+10*lg (WBinterfered/WBinterfering)
Wherein:
Iisolation: antenna insulated degree requirement (dB)
Ptxamp: interference source power amplifier output power (dBm) is advised according to " 3GPPTS25.105V9.1.0 (2010-03) " agreement
It is fixed
Ib: the jamming margin of disturbed system receiver allows maximum spur to interfere:
WBinterfered: interfered base station signal bandwidth
WBinterfereing: interference signal can measuring tape it is wide
Only need to modify Ptxamp, PN, Wbinterfered, the value of Wbinterfering.Isolation will be automatically calculated
It obtains.
In order to guarantee preferable system performance, it is necessary to minimize influence of the various interference signals to system as far as possible.Industry mesh
It is preceding that following several criterion are abided by substantially to interference:
(1) the stray radiation signal strength that disturbed system is received from interference system should make an uproar low than its receiver bottom
7dB；
(2) it should make an uproar the receiver bottom of than low 7dB in third order intermodulation interference (IMP3) level that disturbed system generates；
(3) it is 5dB lower than the 1dB compression point of receiver to be disturbed total carrier power that system is received from interference system, this
It is primarily due in engineering in order to avoid amplifier operation is in inelastic region, often operating point from 1dB compression point rollback 5dB.
If the isolation between system can satisfy the above criterion, the receiver sensitivity of interfered with system will be reduced only
0.8dB or so, this is all acceptable for most systems.
The jamming margin of disturbed system receiver allows maximum spur to interfere:
Calculation formula is Ib:Ib=Pn+NF-7db
Wherein:
Pn (thermal noise power in channel width)=10log (KTB)
(K is Boltzmann constant=1.381 × 10^ (- 23) W/Hz/K；T is absolute temperature, is generally taken；B is radio frequency load
Wavestrip is wide (Hz), and spread spectrum system uses spreading rate；
Pn is converted to dBm and needs to change are as follows:=10log (KTB × 1000mW))
NF is system noise factor, generally takes 5db.Jamming margin is calculated with receiver sensitivity decline 0.8dB, that is, is interfered
It is 7dB lower than system reception sensitivity.
Due in general, meeting first criterion, second, third criterion has also been substantially met.Therefore, exist
It is adjacent mostly using clutter interference and obstruction interference index when analyzing different system base-station mutual interferences in Practical Project planning
Frequency interference and Intermodulation Interference are often included into the scope of clutter interference.
Two, the calculating of antenna spacing (m)
To reduce by two inter-system interferences, antenna will have certain isolation, depend on radiation pattern and space
Distance and gain do not consider the decaying that voltage standing wave ratio introduces usually.Introduce lower formula:
Vertical arrangement: Lv=28+40*lg (k/ λ) (dB)
It is horizontally arranged: Lv=22+20*lg (d/ λ)-(G1+G2)-(S1+S2) (dB)
After deformation: k=λ * 10(Lv-28)/40
D=λ * 10(Lv-22+G1+G2+S1+S2)/20
Wherein:
Lv: insulated degree requirement (dB)
λ: carrier wavelength (m)
K: vertical isolation distance (m)
D: horizontal isolation distance (m)
G1, G2: transmitting and receiving antenna greatest irradiation direction gain (dBi)
S1, S2: (opposite main lobe direction, takes negative value with 90 degree of direction minor levels (dBp) of receiving antenna for transmitting.Omnidirectional antennas
It is zero) when line
The introducing of antenna spacing formula considers isolation between antennas, free space path loss, interference and disturbed antenna
In horizontal, vertical direction gain.
That is: isolation=path loss-Ginterfered-Ginterfering
Wherein:
Ginterfered: interference antenna is in interfered base station frequency band and is directed toward gain on disturbed station direction
Ginterfering: disturbed antenna is in oneself frequency acceptance band and is directed toward gain on jamming station direction
Illustrate:
(1) calculation formula is only applicable to the case where two antenna parallels arrangement, i.e. antenna greatest irradiation direction parallel condition.
(2) in general engineering, we consider parallel arrangement situation, 90 degree of direction minor levels.
(3) when the non-horizontal arrangement of antenna, consider the minor level of inclined direction.
(4) when antenna back to when, minor level is minimum.
(5) when antenna face, minor level is maximum, as main lobe direction.
(6) herein, it is only necessary to modify λ, isolation, G1, G2, the value of S1, S2, horizontal space and vertical interval will be automatic
It calculates and obtains.
Antenna parallel arranges lobe interference schematic diagram referring to Fig. 7, and antenna tilt arranges lobe interference schematic diagram referring to Fig. 8.
Three, each operators communication system type and frequency
Each standard frequency range occupancy of operator 2G/3G/4G is as follows: at present
Each standard band table of 2 operator 2G/3G/4G of table
China Telecom is named as using the 800M band segment of former CDMA for opening FDD-LTE standard 4G network at present
The 2100M frequency range of L800, CDMA2000 also will gradually be used for FDD-LTE, and 3G network is gradually substituted by 4G；
China Mobile retains 3G function, F-band and the E frequency range for indoor distribution using the A frequency range of TD-SCDMA, then directly
Upgrade application is connect in TD-LTE standard 4G network, 4G increases the D frequency range of 2600M again, and TD-SCDMA is gradually moved back by 3G/4G and depositing
Net；
China Unicom using vacant 2G frequency range 900M be applied to 3G frequency WCDMA network, be named as U900, and gradually to
The evolution of the direction 4G.The second half section of DCS1800 frequency range, it is also used for FDD-LTE
Therefore, this analyzes the system antenna that each system interval does not consider mobile TD-SCDMA and telecommunications CDMA2000 from degree
Isolating problem.The network that 2G frequency range opens 4G is occupied, by frequency spectrum and bandwidth, calculates clutter interference to calculate isolation between antennas.
Four, system interval is from degree and isolation distance
According to the calculation method of aforementioned isolation, according to the typical case of each the system radio frequency index and single carrier of rower defined
Power meter calculates isolation between each system and isolation distance is as shown in the table, because this considers horizontal isolation problem, because
This vertical isolation degree is not analyzed:
Each system interval of table 3 requires (dB) from degree
Horizontal isolation required distance (m) between each system of table 4
Five, demonstration
According to the calculated result of the vertical isolation degree distance (rice) between each system of table 4, the antenna between most of system is horizontal
Less than 1 meter, the common steel tower built at present can meet the level of antenna without transformation in normal mounting for space requirement
Isolation distance requirement needs to tilt word not (horizontal interval requires to be greater than 1 meter less than 2.5 meters) and overstriking font in emphasis consideration table
The system interval of (horizontal interval requires to be greater than 2.5 meters) is from problem.
(1) horizontal isolation considers between being greater than 1 meter of system less than 2.5 meters
According to structure discipline to the modification scheme of tower body, in antenna normal mounting, as shown in figure 5, operator day
Line azimuth is arranged generally according to 0 °/120 °/240 °, and two system first community antenna 1A and 2A are placed in parallel, and 0 ° of deflection, just
Meet the modes of emplacement of antenna in the calculation in table 4 well, wherein distance is 2.5 meters between 1A and 2A, meets in table and tilts
The system interval of font is from requiring.Similarly second community antenna 1B and 2B, third cell 1C and 2C, equally meets the requirements.
Fig. 5 gives two system antenna normal orientation angle scheme of installation.
In addition, it is necessary to consider antenna 2A and 1B, 2B and 1C, the isolating problem between 2C and 1A, the spacing of three groups of antennas
From at outer 120 °, calculates, be as follows: again by 120 ° of angles outside antenna
The outer 120 ° of angles of table 5 install the horizontal isolation required distance (m) between each system
Since arm room is away from being 1 meter outside the pole of antenna, overstriking mark part cannot still be met the requirements in table
(2) consider between system of the horizontal isolation greater than 2.5 meters
According to structure discipline to the modification scheme of tower body, the system interval of overstriking mark is from such as two system antennas are flat in table
Row is placed, then is unable to satisfy insulation request, need to consider that there are certain outer angles between the same antenna in cell of two systems, due to operation
Quotient may have fixed requirement to antenna azimuth, general to require to be 0 °/120 °/240 °, and changing azimuth means to change covering
Direction, need and operator negotiation, change the antenna azimuth of one of operator.
Assuming that the azimuth for changing an operator is 60 °/180 °/300 °, two antenna direction of cell same in this way is at outer
60 ° of angles.Secondary lobe is opposite between two antennas, can effectively reduce the interference between antenna and reduce isolation distance, as shown below:
Fig. 6 gives the outer 60 ° of normal orientation angle scheme of installation of two system antennas.
It is as follows that overstriking mark part in table now is recalculated by 60 ° outside two antenna angles:
The outer 60 ° of angles of table 6 install the horizontal isolation required distance (m) between each system
As can be seen from the table, after placing antenna at outer 60 ° of angles, the insulation request of antenna is down within 2 meters, according to structure
Profession can meet the requirements the modification scheme of tower body, such as Fig. 6, antenna 1A and 2A, it is seen then that be able to satisfy between most of system antenna
Insulation request.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of aerial mounting structure, which is characterized in that including tower body and long support arm, the long support arm has fixing end and freedom
End, the fixing end are installed on the tower body, and antenna can be installed on the free end；And multiple long support arm radial radiations
Shape is distributed at the same absolute altitude of the tower body, and the spacing of the adjacent long support arm heaven line meets between different system antennas
Horizontal insulated degree requirement.
2. aerial mounting structure according to claim 1, which is characterized in that the tower body center line is remote to the long support arm
The radial distance at end is in 1250mm~2300mm.
3. aerial mounting structure according to claim 1, which is characterized in that the long support arm includes walkway board, to prop up
The bracket of the walkway board and the antenna holding pole for installing antenna are supportted, it is separate that the antenna holding pole is fixed on the walkway board
One end of the tower body.
4. aerial mounting structure according to claim 3, which is characterized in that the antenna holding pole is detachable to be installed on institute
State the end of walkway board.
5. aerial mounting structure according to claim 3, which is characterized in that the long support arm further includes connecting plate, described
Walkway board is fixed on the tower body by the connecting plate.
6. -5 any aerial mounting structure according to claim 1, which is characterized in that the long detachable installation of support arm
In the tower body.
7. aerial mounting structure according to claim 6, which is characterized in that the long support arm includes anchor ear, described to draw money on credit
Arm is installed on the tower body by the way that the anchor ear is detachable.
8. aerial mounting structure according to claim 1, which is characterized in that the quantity of the long support arm is three, every phase
The horizontal sextant angle of adjacent two long support arms is 120 degree.
9. aerial mounting structure according to claim 1, which is characterized in that the mutiple antennas on same absolute altitude includes China
Mobile, three operators communication system antennas of China Unicom and China Telecom.
10. a kind of communication tower, which is characterized in that including any aerial mounting structure of claim 1-9.
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| CN201920396756.0U CN209389202U (en) | 2019-03-27 | 2019-03-27 | A kind of aerial mounting structure and communication tower |
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| CN201920396756.0U CN209389202U (en) | 2019-03-27 | 2019-03-27 | A kind of aerial mounting structure and communication tower |
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| CN209389202U true CN209389202U (en) | 2019-09-13 |
Family
ID=67852687
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980331A (en) * | 2019-03-27 | 2019-07-05 | 吉林吉大通信设计院股份有限公司长春分院 | A kind of aerial mounting structure and communication tower |
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2019
- 2019-03-27 CN CN201920396756.0U patent/CN209389202U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980331A (en) * | 2019-03-27 | 2019-07-05 | 吉林吉大通信设计院股份有限公司长春分院 | A kind of aerial mounting structure and communication tower |
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Effective date of registration: 20200821 Address after: 130000 room 701 room ninth, room 701, Chaoyang District Nanhu Xuefu City, Changchun, Jilin Patentee after: JILIN JLU COMMUNICATION DESIGN INSTITUTE Co.,Ltd. Address before: Room 739, 7th Floor, Block A, Science Park Building, 2499 Weishan Road, Changchun High-tech Zone, Jilin Province, 130000 Patentee before: JILIN JLU COMMUNICATION DESIGN INSTITUTE Co.,Ltd. CHANGCHUN BRANCH |
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