National Institute of Information and Communications TechnologyNational Institute of Information and Communications Technology
Bing ZHANG, Toshinori Kagawa, Takashi Matsuda and Fumihide Kojima
Just Put on! Sheet Medium communication for Data and Power Transmissions～Creating Smart Life through Microwave Surface Coupling Wireless Power Transmission～
National Institute of Information and Communications Technology
Presentation Outline General Descriptions System Overview Sheet Medium Construction Technical Requirements of the System Control Function for Power
Transmission
Power Transmission/Receiving Devices Applications Integrated Transmission Technology on
Signal and Power by Wireless
National Institute of Information and Communications Technology
General Descriptions The ARIB STANDARD of STD-T113 1.1 has been approved on 3 Dec., 2015.
ARIB_STD_T113_Part3 is newly added: 「Surface Electromagnetic Coupling Wireless Power Transmission System for Mobile Devices」
This ARIB STANDARD specifies an interface between wireless sections of wireless power transmission by surface electromagnetic coupling technology using 2.4GHz band microwave, and wireless sections of power transmission control, aiming at mobile device charging.
Microwave Power Source
Power Receiving Device
Microwave spreads across the entire sheet
National Institute of Information and Communications Technology
System Overview Providing WPT(Wireless Power Transfer) function to mobile device
users based on surface electromagnetic coupling by utilizing induction field of 2.4GHz band microwave.
Surface Electromagnetic Coupling WPT system applies Star topology network consisted by one PTD(Power Transmission Device) and multiple PRDs(Power Receiving Devices). This network allows one PTD to transmit power to multiple PRDs simultaneously.
Allowing multiple PRDs to receive power simultaneously, which are placedon the sheet medium.
National Institute of Information and Communications TechnologyNational Institute of Information and Communications TechnologyWhat is the sheet medium communication system?
• thin planar sheet containing a dielectric layer and metallic cover layers • network terminals are placed on this sheet
The layer serves as a medium for wireless communications,
communication
sourceremote power supply
as well as the propagation of electromagnetic microwaves, which remotely power the terminals.
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National Institute of Information and Communications Technology
6
Integrated Transmission Technology on Signal and Power by Wireless
1D communication
Cable, wire, optical fiber Complexity of wires Effort of connection Lack of mobility
3D communication
Wireless, microwave, infra red Effect of Interference and
noise Battery need to recharge Security problem Low capacity
2D communication
Gigabit data transmission Accurate position
estimation Power supply High security Efficient frequency reuse
Combining the best features of both technologies of wired and wireless networking.
Data communication and power transmission.
National Institute of Information and Communications Technology
Framework of surface electromagnetic coupling WPT(ARIB_STD_T113_Part3)
（Equipment Applied）
Power Receiving
Circuit
Specified point（Power Transmission）
Specified point（Control Signal)
（Equipment Applied）
Power Transmission Device Power Receiving Device
Transmitter Communication Unit Receiver Communication Unit
Power Transmission Unit Power Receiving Unit
Scope of Standard
Power Transmission Circuit
Transmitter Communicati
on Device
Receiver Communicati
on Device
System Overview
National Institute of Information and Communications Technology
0.05 mm0.05 mm
2.50 mm
0.01 mm
MeshConductiveLayer
Dielectric Layer(e.g. the relative permittivity of polyethylene = 2.3)
SolidConductiveLayer
Protection Layer
StripeWidth
7 mm
1 mmInter-Stripe
Distance
Top View
Side View
2D Sheet Structure
2D Sheet Construction
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SMA Connector
Proximity Coupler
Microwave (e.g. 2.4GHz)
National Institute of Information and Communications Technology
Technical Requirements of the SystemPower Transmission Method
Performing power transmission using continuous carrier wave
Power Transmission Frequency
2.497GHz～2.499GHz, in which the central frequency is 2.498GHz.
Frequency range Measurement distance
Limit (peak)
90MH≦ f ≦108MHz & 170MH≦ f ≦222MHz
30m
30μV/m2.497GH≦ f ≦2.499GHz 283mV/m2.500GH≦ f ≦2.535GHz 30μV/m
Otherwise (≦10GHz) 100μV/m
Radiated Emission Limits
Total of the leak electric power
In the case of power transmission
0.15W
In the case of inquiry 0.02W(ARIB_STD_T113_Part3)
National Institute of Information and Communications Technology
Control Function for Power Transmission Connection establishment procedure:
CommunicationUnit for Power
Transmission
CommunicationUnit for Power
Receiving
Recognition of the power receiving device
Power Transmission Unit
Power Receiving Unit
(1) Initial Power Transmission for Inquiry
(2) Request the individual recognition ID
(3) Notify individual recognition ID
(4) Request the information on power receiving unit
(5) Notify the information on power receiving unit
/
Communication Unitof power transmission side
Communication Unitof power receiving side
(8) Information onpower receiving unit
Power Transmission Unit
Power Receiving Unit
(7) Starting power transmission
(9) Monitoring
Stop/Continue the power transmission
Control Procedure:
(ARIB_STD_T113_Part3)
National Institute of Information and Communications Technology
Power Transmission/Receiving DevicesPower Receiving Device (SMA Connector)
560mm×390mm
Power Transmission Device
Sheet medium
Front Back
Sheet MediumPower Transmission/Receiving
Power Feeding PointAntenna Element
Distribution of Electric Field Strength
Material Material Constant
dielectric
εr =1.1;tanδ=0.1×10-2
εr: relative permittivityTanδ: dielectric tangent
(ARIB_STD_T113_Part3)
National Institute of Information and Communications Technology
Communication Sheet Medium
7 mm
Biometric study viasheet medium
Wireless power transmission for EV
Sensor network with Wireless Power and Data Transmission
PC peripheral equipmenton signal and power by wireless
Application systems using sheet medium
High efficiency power transmission system via two-side mesh sheet medium
Flexible communication sheet medium
Integrated Transmission Technology on Signal and Power by Wireless
National Institute of Information and Communications Technology
ApplicationsCharge it by “Just put on”
Connect it by “Just put on”
