Network of wireless and passive sensors (without batteries), using a set of unique sensors which use a frequency for the data transfer (obtained by sensors) and another frequency for the reception of energy that is emitted by transmitters that power the sensors. For this, only a central data reception and wireless transmission structure is required which communicates with each of the sensors independently. These sensors have low power consumption and high data rates (up to 960 Mb/s).
CONTEXT
Wireless sensors, which transmit the collected information without the need of wiring, have gainedincreasingcommercial importance. These sensors can be used in a wide range of situations, fromenvironmentalmonitoring to farm and industrial control. However, most sensors still need to use batteries, which increases maintenance and environmental costs.
The presented sensors are an alternative since they do not require any type of battery and receive energy through a specific frequency emitted by an energy transmitter. These passive sensors gain even more relevance if sensor networks are formed, in which several nearby sensors detect and transmitenvironmentaldata. These sensors can have the capability of reusing ambient electromagnetic waves to perform the communication (e.g. Wi-Fi, Bluetooth,LoRa, etc.)
APPLICATIONS
This passive sensor system can be used in a wide range of applications, such as:
COLLECTION OF ENVIRONMENTAL DATA - e.g. farm fields, insidebuildings
ACCESSES CONTROL - e.g. parking lots,buildings
USES REQUIRING HIGH TRANSMISSION RATES - e.g. audio or videosensors
BENEFITS
Compared to traditional sensors:
LOWER COST: no batteries, of any kind.
INCREASED CONVENIENCE: no batterycharge orchange, nowiring.
Compared to other passive sensors:
LOWER POWER CONSUMPTION
HIGHER DATA TRANSMISSION RATES: up to 960Mb/s.
POSSIBILITY TO USE AMBIENT ELECTROMAGNETIC WAVES: Wi-Fi, Bluetooth,LoRa, etc.
DEVELOPMENT STAGE
TRL 4
Fieldtests performed with prototypes
COMMERCIAL OFFERING
TARGET MARKET
ITseeks partners within the area of sensor development andmanufacturing.
INVENTORS
Researchersfrom:
-Instituto deTelecomunicações (IT)
-Universidade deAveiro
INTELLECTUAL PROPERTY
Patent granted in
-USA(US201716466883)
-Europe(EP20170825932)
SCIENTIFIC PUBLICATIONS
D. Matos, R.Correia and N. B. Carvalho, "Millimeter-Wave Hybrid RF-DC Converter Based on a GaAs Chip forIoT-WPT Applications," inIEEE Microwave and Wireless Components Letters, vol. 31, no. 6, pp. 787-790, June 2021,doi: 10.1109/LMWC.2021.3058542.
D. Belo et al., "IQ Impedance Modulator Front-End for Low-PowerLoRa Backscattering Devices," inIEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 12, pp. 5307-5314, Dec. 2019,doi: 10.1109/TMTT.2019.2941854.
TECHNOLOGY ID
PI-0101
#Backscatter
#WirelessPowerTransmission
#PassiveSensors
Instituto de Telecomunicações (IT) is a private, not-for-profit organization, of public interest, a partnership of nine institutions with research and development in the field of Telecommunications
IT mission is to create and disseminate scientific knowledge in the field of telecommunications.
IT is actively involved in fundamental and applied research both at national and international levels. Simultaneously it is committed to foster higher education and training, by hosting and tutoring graduate and postgraduate students. it also plays its role towards public society with public awareness initiatives, knowledge transfer to industry, and by providing consulting services on a non-competing basis.
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