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Proprietary & Confidential
TenXc Bi-Sector Array Antenna Implementation Guidelines
Proprietary & Confidential
Introduction
•
TenXc’s 850/900 Bi-Sector Array is a new and innovative solution for 806- 960MHz band networks for enhanced network capacity and quality in high- capacity macro cell sites.. The Bi-Sector Array applies the principle of
paired asymmetric beams to higher order sectorization
to increase overall site capacity while maintaining optimal coverage. The Bi-Sector Array matches the original 65º
pattern with a new asymmetric beam-pair
contoured to optimize central overlap and edge roll-off characteristics.
The 850/900 Bi-Sector Array incorporates the latest in array technology with a single broadband panel supporting two sectors in a highly
compact radome
design. Network site applications include the replacement of existing 65º
or 33º
antennas, new capacity site builds,
deferral of carrier adds, and spectrum refarming
in high demand or spectrum limited markets.
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Bi-Sector Antennas -TenXc•
Increased capacity with Higher Order Sectorization (HOS): 4, 5 and 6-
sector sites in GSM •
4 Port Antenna
•
Two ‘6-sector’
Antennas in a common Radome•
Small adjacent sector overlap and asymmetrical reduce interference
•
Close match of original tri-sector coverage reduces need for optimization for HOS upgrades
Conventional Multi-Sector TenXc Bi-Sector Array
Reduced interference and lower losses: matched coverage
Increased interference from overlap areas and loss of coverage in main beam
Asymmetric 33°
Patterns
0
30330
0
30330
0
30330
Small Coverage overlap
Reduced interference and lower losses: matched coverage
Off-the-shelf Symmetric 33°
Antennas
Asymmetric 33°
Patterns
0
30330
0
30330
0
30330
Small Coverage overlap
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Objective –
Bi-Sector Antenna (BSA)
•
To achieve High Capacity in High Traffic Cells
•
Better Interference Containment and Traffic Balance
•
Use of Higher Order Sectorization in High capacity Sites
•
Relieve congestion•
Enhance Spectral Efficiencies
•
Use of Back to Back BCCH frequencies
•
Overcome constraint of adding Trx
in spectrum limited
•
Networks with use of Back to Back BCCH
•
Improve in building coverage
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Implementation Considerations
•
Site Numbering Strategy•
Strict replacement strategy: A replaced by A&D, B by B&E and C by C&FWhy?
•
Need to allow for growth from 3 to 4, 5 and 6 Sectors•
Minimize reconfiguration between 3 and 4, 5 and 6 sector sites•
Maintains Sector statistics as much as possible•
Allows for Back-to-Back (B2B) BCCH allocations (for GSM Networks)
C B
A A
E
D
C
BF
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Frequency Planning
Overall Strategy
•
‘A’
should not be a candidate of ‘E’, etc
•
Reuse existing 3-sector list: ‘Old list A’
should be used on both A and D
•
Optimize once MS based measurements or drive testing is performed
Sector Handover Candidate
A F, D
D A, B
B D, E
E B, C
C E, F
F A,C
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Implementation Considerations - 2
Item Requirement CheckAvailability of space for additional cabinet for higher TRX Configuration. 2 Cabinets � Availability of Transmission Resources ( Additional E1) for higher TRX counts 2 E1 for 24 TRX � Upgrading of power resources suitable for higher capacity configurations As required � Feeder Lines to be planned for additional sectors.
2 Per Sector � Suitability of existing pole to replace existing antenna with TenXc antenna 5 to 12 cm mount � VSWR of all feeders and TenXC
antennas validation and readings meeting the specifications <1.4 Required �
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Electrical Specification
Frequency Range 806 -
866 MHz 824 -
896 MHz 870 -
960 MHz
Azimuth Beamwidth (-3dB) 36°
Asymmetric 34°
Asymmetric 33°
Asymmetric
Elevation Beamwidth
(-3dB) 8.3° 8.2° 8°
Elevation Sidelobes
(Upper) < -16dB < -17dB < -18dB
Gain 18.5dBi (16.4dBd) 18.9dBi (16.8dBd) 19.1dBi (17.0dBd)
Polarization ±
45°
Slant ±
45°
Slant ±
45°
Slant
VSWR < 1.3:1 < 1.3:1 < 1.3:1
Front-to-Back Ratio > 30dB > 30dB > 30dB
Isolation* > 30dB > 30dB > 30dB
Electrical Downtilt 4° 4° 4°
Input Impedance 50 Ohms 50 Ohms 50 Ohms
Input Power 300 Watts CW 300 Watts CW 300 Watts CW
Passive Intermodulation
(2x20W) ≤
-150dBc ≤
-150dBc ≤
-150dBc
Lightning Protection DC Ground DC Ground DC Ground
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Mechanical Specifications
Dimensions (LxWxD) 87 x 30 x 8 inches
Survival Wind Speed > 120 mph (> 193 km/hr)
Front Wind Load 100 mph (161 kph)
Side Wind Load 100 mph (161 kph)
Equivalent Flat Plate Area 18 ft2 (1.7 m2)
Weight (without Mounting) 49kg
Connector 2x2; 7-16 DIN female
Mounting Pole 2-5 inches (5-12 cm)
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General Check Point During Installation
•
Remove antenna packing carefully when you are finally ready to install the antenna.
•
While hoisting the antenna, take care that antenna does not strike any tower members due to jostling.
•
Also ensure that the rope used for hoisting does not damage the connectors of the centre fed antenna at its back.
•
Ensure RF cable are routed with the sequence of 1-4, 2-5 and 3-6. (Refer slide no. 5)
•
Make sure all connectors are cleaned properly.•
Check the VSWR of RF cable along with Jumper Cable (If applicable). It should be <=1:1.3
•
Make some standard color marking in RF cable (Tx
& Rx both) to avoid any confusion at the top of the Tower
•
Put weather proofing tape on antenna connector and RF Cable properly
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Sample Photo
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Some More Photo
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Thank You
Prepared By:
Ankit AgarwalEmail: [email protected]: +91 9891174833www.tenxc.com