how to use rf energy harvesting for wireless charging
DESCRIPTION
Understanding Humavox innovative wireless charging technology using RF energy harvesting.TRANSCRIPT
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RF Energy HarvestingAmbient Energy sources
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RF Energy HarvestingAmbient RF Energy sources
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RF Energy HarvestingThe Concept
Base station
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TxRx
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RF Energy HarvestingThe Harvesting Unit
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Single source
Static receiver
Portable receiver
Multiple sources
Static receiver
Portable receiver
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RF Energy HarvestingThe Harvesting Unit
impedance matching
RectifierRF2DC
Summation &
StorageApplication
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RF Energy HarvestingThe Harvesting Antenna
Narrow band antenna
wide band antenna
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Antenna directivity
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RF Energy HarvestingThe Harvester IM networkFrequency and power consideration
(-dBm) 0 dBm (+dBm)0
10
20
30
40
50
60
70
80
90
100
Passive ActiveE)%(
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RF Energy HarvestingThe Harvester RF2DC unit
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RF Energy HarvestingThe Harvester storage & summation unit
Single VS. multiple sources
CRF2DC 1
CRF2DC 2
CRF2DC n
+Cstorage
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Cstep upCRF2DC
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RF Energy HarvestingConclusions
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advantage:
• Free energy• Wireless energy transfer• Portable devices
Disadvantage:
• Low power density (environment) • Low efficiency (RF2RF) • High efficiency conversion - complicated system• Limitation of ISM band