rf technology for 5g mmwave systems · optimizing the antenna design example – antenna with 60dbm...
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THOMAS CAMERON, PHD
RF Technology for 5G mmwave Systems
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WHAT WE DO
We enable our customers to interpret the world around us by intelligently bridging the physical and digital with unmatched technologies that sense, measure and connect.
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Agenda
►Hybrid Beamforming ►mmwave Radio technologies ►Optimizing the Antenna Design Example – antenna with 60dBm EIRP
►RF Technology Pipeline
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mmwave Hybrid Beam Forming
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►RF beamforming channel for single stream (n antennae per data stream) ►m up/down converters and m sets
of ADCs and DACs ► Total antennae = mXn ►Enables spatial multiplexing and
multi-user MIMO
m
DAC
ADC n
DAC
ADC n
Digital Coding
Equalization Synchronization
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mmwave Radio Technology
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Architecture
Application
Partition
Technology fit
DAC
ADC
CMOS SiGe BiCMOS GaAs/GaN CMOS SiGe BiCMOS CMOS
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Optimizing the Antenna Array Design
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► Assumptions: 60dBm EIRP 3-4 GHz IF, 800MHz BW PAPR =9 dB
CMOS
SiGe
GaAs
GaN
Digital
8
DAC
ADC n
DAC
ADC n
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Optimizing the Antenna Array Design
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► DC power consumption scales inversely with antenna size
► Beyond 500 elements diminishing returns
Digital
8
DAC
ADC n
DAC
ADC n
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Optimizing the Antenna Array
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CMOS
SiGe
GaAs
GaN
8
DAC
ADC n
DAC
ADC n
Digital
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Optimizing the Antenna Array
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CMOS
SiGe
GaAs
GaN
►DC power is optimized with array sizes of ~128 element ► Larger arrays allow for the
use of silicon PAs and allow RFICs to fit λ/2 spacing
►Smaller arrays would be optimal for lower EIRP requirements
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5G RF Technology Pipeline
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Architecture&
Algorithms
mmwave Test and
Measurement
3D EM Modelling
PA Efficiency
Synchronization
Calibration
mmwave CMOS
5G Radio
Antenna &
Substrate SiGe
BiCMOS
GaAs
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