Battery-less Transmitter and Frequency-Agile Receiver for IoT Applications

Simple item page
dc.contributor.advisorBabakhani, Aydin
dc.creatorLi, Dai
dc.date.accessioned2019-05-17T13:33:04Z
dc.date.available2019-05-17T13:33:04Z
dc.date.created2018-05
dc.date.issued2018-04-19
dc.date.submittedMay 2018
dc.date.updated2019-05-17T13:33:04Z
dc.description.abstractRecent increasing demands for IoT device, wearable device and biomedical implants have been calling for more low power, energy efficient and highly integrated devices from electronic industry. Implementing transmitter and energy-harvesting circuits on a same chip is a good way to provide battery-less systems for data transmission in wireless sensor networks. Prior wireless powered devices work used sub-gigahertz microwaves and require very large antenna for energy harvesting, which prevents their application in biomedical implants and single-chip integration. Our work on battery-less transmitter integrated on-chip antenna for 8 to 10 GHz wireless energy harvesting. This approach reduced antenna size and provided stable 10uW energy source for duty-cycled operating transmitter. The transmitter used On-Off Key (OOK) modulation. Oscillator, a class-E power amplifier and a dipole on-chip antenna are the main components of the transmitter. The transmitter operates at 1.46GHz and consumes 25mW power. The on-chip antenna is matched to the transmitter at 1.46GHz and could radiate up to -20dBm power into the air. By modulating from an external signal source, the data rate can be as high as 50M Bit/sec. The transmitter is able to harvest power from a radiating antenna 30cm away from the chip with a size of 7.4mm2 and transmit data back. Thus it is suitable for biomedical implant and wearable devices. On the other hand, our work introduced a frequency-agile receiver that detect and switch to the most power efficient channel quickly. The receiver consists of a band-switching low noise amplifier (LNA), an all-digital-phase-locked-loop (ADPLL), a power detector and a successive approximation analog to digital converter. The receiver worked at 4.3 to 5.7GHz and provide quick band-switching on the LNA and ADPLL. It provides quick and accurate channel selection in quickly changing environments.
dc.format.mimetypeapplication/pdf
dc.identifier.citationLi, Dai. "Battery-less Transmitter and Frequency-Agile Receiver for IoT Applications." (2018) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/105609">https://hdl.handle.net/1911/105609</a>.
dc.identifier.urihttps://hdl.handle.net/1911/105609
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectEnergy Harvesting
dc.subjectTransmitter
dc.subjectInternet of Things
dc.subjectLow Noise Amplifier
dc.subjectPhase-Locked-Loop
dc.titleBattery-less Transmitter and Frequency-Agile Receiver for IoT Applications
dc.typeThesis
dc.type.materialText
thesis.degree.departmentElectrical and Computer Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LI-DOCUMENT-2018.pdf
Size:
2.53 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
5.84 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
LICENSE.txt
Size:
2.6 KB
Format:
Plain Text
Description:
Download
Collections
Rice University Electronic Theses and Dissertations