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TenXc Bi-Sector Array Antenna Implementation Guidelines

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Introduction

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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)

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To achieve High Capacity in High Traffic Cells

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Better Interference Containment and Traffic Balance

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Use of Higher Order Sectorization in High capacity Sites

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Relieve congestion•

Enhance Spectral Efficiencies

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Use of Back to Back BCCH frequencies

•

Overcome constraint of adding Trx

in spectrum limited

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Networks with use of Back to Back BCCH

•

Improve in building coverage

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Implementation Considerations

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Site Numbering Strategy•

Strict replacement strategy: A replaced by A&D, B by B&E and C by C&FWhy?

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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

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‘A’

should not be a candidate of ‘E’, etc

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Reuse existing 3-sector list: ‘Old list A’

should be used on both A and D

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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

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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.

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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)

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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

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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: aagarwal@tenxc.comCall: +91 9891174833www.tenxc.com