Active Antenna Systems - Adhesive Networks · Active Antennas The Past Conventional BTS The Present...
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Active Antenna Systems
Transcript of Active Antenna Systems - Adhesive Networks · Active Antennas The Past Conventional BTS The Present...
Active Antenna Systems
2 PRIVATE AND CONFIDENTIAL © 2011 CommScope, Inc
Leader in active antennas
• CommScope is a world leader in antenna designs
• Pioneering active antennas for over 10 years
• Joint development with Ubidyne since 2007
• CommScope has developed industry-leading technology in remote radioheads, filters, amplifiers, and wideband linearization
• Combined expertise positions CommScope as a global leader in active antennas
World Class Antennas
World Class Transceivers
Amplifiers, Filters,
Linearization
World Class Active
Antennas
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Active Antenna Design Challenges
Filter Design
Size, Insertion Loss
Amplifier Design
Efficiency, Bandwidth
Mechanical Design
Interconnects,
Thermal
Antenna Design
Beam Patterns, Active/Passive Combinations,
Graceful Degradation
All are CommScope core competencies
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Wireless Network Evolution The Future
Active Antennas The Past
Conventional BTS The Present
Remote Radio Head
Base Station Server
Coaxial Cable
Passive Antennas
Masthead Amplifiers
RET
Base Station Server Remote
Radio Head
Passive Antennas
COAX Cables
RET COAX Jumpers
Minimizing the hardware footprint is a key benefit to active antenna design
BTS
(Channel Cards, Radios,
Amplifiers, Filters)
Channel Cards
Channel Cards
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Pioneering Technology
Extremely Simple, Digital Architecture • RRH functionality integrated and distributed into the antenna • Transceiver on each element — redundant architecture • Digital IF from a central DSP unit, C-Hub • Future-proof, multi-standard, soft-configurable • Standard sized antenna — fiber feed from the base band radio • Improved MTBF and network reliability
– Redundant radio architecture – Distributed low-power transceivers – Custom chip integration – Passive cooling
• Direct control of signals to each radiator enables digital elevation beam control at baseband — capacity improvements
Antenna Embedded Radio™
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Single Failure Before Compensation
Single Failure After Compensation
Unmatched Service Life Due To Built-In Redundancy And Unique Pattern Compensation Capability
-20dB
-15dB
-10dB
-5dB
-20dB
-15dB
-10dB
-5dB
-20dB
-15dB
-10dB
-5dB
Normal Pattern
Self-Healing! • First upper side lobe
suppressed automatically • Tilt adjusted to maintain
cell coverage
4dB
A Self-Healing Response To A Failure
E1
E1’
E2
E2’
En
En’
…...
.....
5°tilt
E1
E1’
E2
E2’
FAILED ELEMENT
En
En’
…...
.....
5°tilt
E1
E1’
E2
E2’
FAILED ELEMENT
En
En’
…...
.....
2°tilt
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Dynamic Electronic Pattern Control
Tx / Rx Tilt Optimization
• Significant capacity improvement - Improves handset battery life
Tilt by Standard– Air Interface
#1 #2 #3 • Tilt per standard (GSM/UMTS/LTE)
- Simplifies RAN sharing
Tilt by Carrier- Vertical Sectorization
• Multiple beams per carrier enables vertical sub-sectorization for capacity enhancement
Beam Shape Control
Unique capability to optimize signal patterns of each carrier of each sector for Maximum Network Performance
Pattern A Pattern B
Tx
Rx
Rx
Tx
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High-band Active Antenna Currently in Development
• Radio modules are field replaceable
• Antenna array elements identical to current Andrew passive element arrays
• Multi-standard
• 1800, 1900, AWS and 2600 MHz models in the roadmap
304 mm (11.8 in)
1300 mm
(51.2 in )
196 mm (6.9 in)
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Active-Passive Antennas in Development
• Passive and Active antenna arrays in a dual-column arrangement
• Design borrows from CommScope’s industry leading antenna arrays
• Broadband elements to cover low-band or high-band applications
High Band Active Antenna Array
High Band Passive Antenna Array
Power Connector
CPRI/ORI
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700 MHz Active Antenna General Specifications
• 1.8 m (6 ft) antenna
• 12° elevation beamwidth
• 65° azimuth beamwidth
• 16.5 dBi gain
• 15 W RF output power per array (6 x 2.5 W)
• 30 W RF output power total (2 x 15 W)
• Single 10 MHz LTE carrier
• 6 dual-polarized radiating elements with 12 total Tx/Rx paths
1.8 m (6 ft)
700 MHz Active
Antenna LTE Trial
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700 MHz Active Antenna Pattern Measurements
• Azimuth and elevation patterns recorded in May, 2011
• Elevation beam down-tilting characterization completed for 0°to 14°range
• Elevation pattern shaping confirmed with excellent agreement to theoretical patterns
• Pattern compensation demonstrated for simulated transceiver failures
700 MHz Active Antenna in Anechoic Chamber
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700 MHz Active Antenna Azimuth Pattern
Excellent cross-polarization patterns
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700 MHz Active Antenna Elevation Pattern
Excellent elevation patterns and upper side-lobe performance with down tilt
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Environmental Verification Testing: Thermal Characterization and Burn-In
48 hour full power burn-in testing High temperature (50°C) thermal testing
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EMC Testing
• Radiated emissions compliance demonstrated for CISPR22 Class B for 10 m (32.8 ft) distance:
• 30 to 230 MHz (30 dBμV per m)
• 230 to 1000 MHz (37 dBμV per m)
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Field Trial Installation
700 MHz Active Antenna
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Active Antenna Product Roadmap
4th Gen Multi-column beamforming
2012 2013 2014 2015 2011 2016
3rd Gen Active – Active & Active-Active- Passive
2nd Gen Active – Passive
1st Gen Active Arrays
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Thank You
