Development of Integrated Wireless Power Transfer, Sensing, and Communication Using Compact Reconfigurable RF Structures

Raza, Ali

Development of Integrated Wireless Power Transfer, Sensing, and Communication Using Compact Reconfigurable RF Structures

Raza, Ali

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Publication Type:: Thesis
Issue Date:: 2024

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Field	Value	Language
dc.contributor.author	Raza, Ali
dc.date.accessioned	2025-07-04T01:38:07Z
dc.date.available	2025-07-04T01:38:07Z
dc.date.issued	2024
dc.identifier.uri	http://hdl.handle.net/10453/188080
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	Recent advancements in Wireless Sensor Networks (WSNs) have transformed various industries, including precision agriculture. In this field, sensors are essential for collecting real-time data on soil moisture, temperature, and other environmental factors, which is vital for optimizing farming practices. As a core element of the Internet-of-Things (IoT), sensor technology enables efficient data collection and transmission; however, these sensors must be highly sensitive, accurate, compact, and autonomous to detect continuous, subtle data changes. Reliance on batteries to power these sensors restricts their operational range and longevity, posing significant challenges for large-scale deployment. This limitation has driven a growing need for Wireless Power Transfer (WPT) technologies to eliminate battery dependency, along with compact, high-precision sensors. The integration of WPT, sensing, and communication technologies is essential to developing a sustainable and efficient smart agriculture system, allowing for continuous sensor operation and reliable data transmission. This thesis presents an integrated system for WPT, sensing, and communication, utilizing compact and reconfigurable RF structures. Several novel designs are introduced to improve the accuracy, miniaturization, and multifunctionality of RF structures for precision agriculture. Two configurations of miniaturized patch rectennas are proposed for WPT to eliminate battery dependence. These planar and compact structures, with high RF-to-DC conversion efficiencies, are promising candidates for WPT applications. A novel compact Multi-Service Antenna (MSA) is introduced for smart agriculture. The proposed MSA is versatile and capable of functioning as a single- or dual-band antenna and also measuring the permittivity of materials. A joint sensing and communication system is developed for smart agriculture, integrating an Ultra-compact Soil Moisture Sensor (UCSMS) for sensing and a Pattern Reconfigurable Antenna (PRA) for transmitting information to the base station. Additionally, a compact multi-band soil moisture sensor is proposed for precision farming. By integrating the sensor, directional coupler, and amplifier, a multi-band remote sensing system is realized. The proposed sensors are adaptive and capable of measuring soil moisture within the range of 0–30%. The compact planar geometry, combined with high sensitivity and low resonance frequencies, makes the designs highly suitable for smart farming applications. Finally, three novel configurations of passive transmit/receive (T/R) switches are presented to integrate WPT, sensing, and communication technologies. These multi-band designs require no biasing voltage to switch signal direction and provide automatic switching between low- and high-power RF signals with low insertion loss. The proposed designs effectively enhance signal routing and enable efficient power management for low-power IoT applications.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/188080/3/thesis.pdf
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	© 2024 Ali Raza
dc.rights	au.edu.uts.lib/nph
dc.title	Development of Integrated Wireless Power Transfer, Sensing, and Communication Using Compact Reconfigurable RF Structures	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

Recent advancements in Wireless Sensor Networks (WSNs) have transformed various industries, including precision agriculture. In this field, sensors are essential for collecting real-time data on soil moisture, temperature, and other environmental factors, which is vital for optimizing farming practices. As a core element of the Internet-of-Things (IoT), sensor technology enables efficient data collection and transmission; however, these sensors must be highly sensitive, accurate, compact, and autonomous to detect continuous, subtle data changes. Reliance on batteries to power these sensors restricts their operational range and longevity, posing significant challenges for large-scale deployment. This limitation has driven a growing need for Wireless Power Transfer (WPT) technologies to eliminate battery dependency, along with compact, high-precision sensors. The integration of WPT, sensing, and communication technologies is essential to developing a sustainable and efficient smart agriculture system, allowing for continuous sensor operation and reliable data transmission. This thesis presents an integrated system for WPT, sensing, and communication, utilizing compact and reconfigurable RF structures. Several novel designs are introduced to improve the accuracy, miniaturization, and multifunctionality of RF structures for precision agriculture. Two configurations of miniaturized patch rectennas are proposed for WPT to eliminate battery dependence. These planar and compact structures, with high RF-to-DC conversion efficiencies, are promising candidates for WPT applications. A novel compact Multi-Service Antenna (MSA) is introduced for smart agriculture. The proposed MSA is versatile and capable of functioning as a single- or dual-band antenna and also measuring the permittivity of materials. A joint sensing and communication system is developed for smart agriculture, integrating an Ultra-compact Soil Moisture Sensor (UCSMS) for sensing and a Pattern Reconfigurable Antenna (PRA) for transmitting information to the base station. Additionally, a compact multi-band soil moisture sensor is proposed for precision farming. By integrating the sensor, directional coupler, and amplifier, a multi-band remote sensing system is realized. The proposed sensors are adaptive and capable of measuring soil moisture within the range of 0–30%. The compact planar geometry, combined with high sensitivity and low resonance frequencies, makes the designs highly suitable for smart farming applications. Finally, three novel configurations of passive transmit/receive (T/R) switches are presented to integrate WPT, sensing, and communication technologies. These multi-band designs require no biasing voltage to switch signal direction and provide automatic switching between low- and high-power RF signals with low insertion loss. The proposed designs effectively enhance signal routing and enable efficient power management for low-power IoT applications.

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