Dr. Negin Shariati is a Lecturer at UTS and Deputy Director of the RF and Communications Technologies Lab (RFCT). She established the state of the art RFCT research lab in 2018 where she leads research in RF and microwave circuits, RF energy harvesting, wireless power transmission, and self-powered electronics for IoT. She is responsible for defining the research direction and strategy of the lab and equipping RFCT with world-class RF design, fabrication and measurement facilities. Dr Negin Shariati is also a Lecturer at Hokkaido University since 2018, externally engaging with research and teaching activities in Japan.
She completed her PhD in Electrical-Electronic and Communication Technologies at Royal Melbourne Institute of Technology (RMIT), Australia, in 2016. She worked in industry as an Electrical-Electronic Engineer from 2008-2012.
Negin is the recipient of the IEEE Victorian Section Best Research Paper Award 2015, RMIT Higher Degree by Research (HDR) Publication Grant 2015, the Boeing Scholarship 2013, Research Paper Grants at European Microwave Conferences 2012, 2014 and 2015, the Best Oral Presentation Prize at European Microwave Conference 2012, the Best Oral Presentation Prize at RMIT HDR Conference 2012, and RMIT Postgraduate Research Scholarship. She was identified as a high performing teaching staff in 2016, School of Engineering, RMIT University.
- Reviewer of IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Antennas and Propagations and Nature Scientific Reports.
- Member of IEEE, MTTs (Microwave Theory and Technique Society)
Can supervise: YES
Radio Frequency (RF) energy harvesting has experienced a rapid development in recent years due to the increasing number of RF transmitter sources producing an abundant ambient microwave energy waste. Furthermore, the development of wireless power transmission (WPT) technologies has triggered impetus for RF energy harvesting. Hence, RF energy scavenging is a promising solution as it has the potential to provide a sustainable energy source to meet upcoming demands.
Efficient ambient RF energy scavenging is a very challenging issue, as it deals with the low RF power levels available in the environment. The scavengeable power levels are generally unknown and can vary unpredictably; therefore sparking research interest to develop highly sensitive RF energy scavengers to capture ambient RF signals over a range of low input power levels.
My research focuses on a real life RF energy scavenging approach to generate electrical power in urban environments.
My current research areas include:
RF energy harvesting circuits and systems, Wireless RF power transmission, Self-powered electronic systems for IoT, Simultaneous wireless information and power transfer (SWIPT), and Renewable energy systems.
Current: Advanced Sensor Networks
Previous: Electronics Studios, Microwave Circuit Design, Communication Engineering, Radar Systems, Signals and Systems, Engineering Methods, Mathematics, Networking Essentials
Amiri, M, Tofigh, F, Shariati, N, Lipman, J & Abolhasan, M 2019, 'Miniature tri-wideband Sierpinski–Minkowski fractals metamaterial perfect absorber', IET Microwaves, Antennas & Propagation.View/Download from: Publisher's site
Rouzbehi, K, Miranian, A, Escaño, JM, Rakhshani, E, Shariati, N & Pouresmaeil, E 2019, 'A Data-Driven Based Voltage Control Strategy for DC-DC Converters: Application to DC Microgrid', Electronics, vol. 8, no. 5, pp. 493-493.View/Download from: UTS OPUS or Publisher's site
This paper develops a data-driven strategy for identification and voltage control for DC-DC power converters. The proposed strategy does not require a pre-defined standard model of the power converters and only relies on power converter measurement data, including sampled output voltage and the duty ratio to identify a valid dynamic model for them over their operating regime. To derive the power converter model from the measurements, a local model network (LMN) is used, which is able to describe converter dynamics through some locally active linear sub-models, individually responsible for representing a particular operating regime of the power converters. Later, a local linear controller is established considering the identified LMN to generate the control signal (i.e., duty ratio) for the power converters. Simulation results for a stand-alone boost converter as well as a bidirectional converter in a test DC microgrid demonstrate merit and satisfactory performance of the proposed data-driven identification and control strategy. Moreover, comparisons to a conventional proportional-integral (PI) controllers demonstrate the merits of the proposed approach.
Shariati, N, Scott, JR, Schreurs, D & Ghorbani, K 2018, 'Multi-tone Excitation Analysis in RF Energy Harvesters -Considerations and Limitations', IEEE Internet of Things Journal, vol. 5, no. 4, pp. 2804-2816.View/Download from: UTS OPUS or Publisher's site
The effect of multitone excitation on the dc response of a voltage-doubler radio frequency energy harvester is analyzed. Theoretical analysis as well as frequency and time domain (TD) simulations were conducted to clarify the findings. Measurements were also carried out to validate the results. The measured, simulations and theoretical results are in good agreement. This paper focuses on evaluating the performance of a voltage doubler rectifier under multitone excitation (input power is the same in the single-tone and multitone case). Based on TD and harmonic balance simulations, theoretical and measurement analyses, it is evident that the application of multiple tones simultaneously within the matched frequency band and with the same average available power results in a lower average output dc power when compared with the single-tone case with the same input power. This trend is evident over a broad low input power range of -50 to -10 dBm (0.01-100 μW).
Rouzbehi, K, Yazdi, SSH & Moghadam, NS 2018, 'Power Flow Control in Multi-Terminal HVDC Grids Using a Serial-Parallel DC Power Flow Controller', IEEE ACCESS, vol. 6, pp. 56934-56944.View/Download from: UTS OPUS or Publisher's site
Abolhasan, M, Abdollahi, M, Ni, W, Jamalipour, A, Shariati, N & Lipman, J 2018, 'A Routing Framework for Offloading Traffic from Cellular Networks to SDN-based Multi-Hop Device-to-Device Networks', IEEE Transactions on Network and Service Management, vol. 15, no. 4, pp. 1516-1531.View/Download from: UTS OPUS or Publisher's site
IEEE Device-to-Device (D2D) Communications are set to form an integral part of future 5G wireless networks. D2D communications have a number of benefits such as improving energy efficiency and spectrum utilization. Until now much of the D2D research in LTE and 5G-type network scenarios have focused on direct (one-hop) communications between two adjacent mobile devices. In this paper, we propose a new routing framework called Virtual Ad hoc Routing Protocol (VARP). This framework introduces significant advantages such as better security, lower routing overheads, and higher scalability, when compared to conventional ad hoc routing protocols. It also reduces traffic overhead in LTE networks using multi-hop D2D communications under management of a SDN-controller. Further, it enables the development of various types of routing protocols for different networking scenarios. To this end, a source-routing based protocol was developed on top of VARP, referred to as VARP-S. We present a detailed analytical study of routing overhead in the VARP-S protocol, as compared to overhead analysis of our previous proposed Hybrid SDN Architecture for wireless distributed networks (HSAW)IEEENetworkMehran. Our results show that VARP-S, compared to HSAW, achieves higher network scalability and lower power consumption for mobile nodes.
Abdollahi, M, Abolhasan, M, Shariati, N, Lipman, J, Jamalipour, A & Ni, W 2019, 'A Routing Protocol for SDN-based Multi-hop D2D Communications', 2019 16TH IEEE ANNUAL CONSUMER COMMUNICATIONS & NETWORKING CONFERENCE (CCNC), 16th IEEE Annual Consumer Communications and Networking Conference (CCNC), IEEE, Las Vegas, NV.
Chehrazad, S, Aghdasi, HS, Shariati Moghadam, N & Abolhasan, M 2017, 'Addressing coverage problem in wireless sensor networks based on evolutionary algorithms', 2017 23rd Asia-Pacific Conference on Communications (APCC), Asia-Pacific Conference on Communications, IEEE, Perth, WA, Australia.View/Download from: UTS OPUS or Publisher's site
Wireless Sensor Networks (WSNs) are the key part of Internet of Things, as they provide the physical interface between on-field information and backbone analytic engines. An important role of WSNs-when collecting vital information-is to provide a consistent and reliable coverage. To Achieve this, WSNs must implement a highly reliable and efficient coverage recovery algorithm. In this paper, we take a fresh new approach to coverage recovery based on evolutionary algorithms. We propose EMACB-SA, which introduces a new evolutionary algorithm that selects coverage sets using a fitness function that balances energy efficiency and redundancy. The proposed algorithm improves network's coverage and lifetime in areas with heterogeneous event rate in comparison to previous works and hence, it is suitable for using in disaster management.
Shariati, N, Rowe, WST & Ghorbani, K 2015, 'Highly sensitive FM frequency scavenger integrated in building materials', Proceedings of the European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC, European Microwave Conference, IEEE, Paris, France, pp. 68-71.View/Download from: UTS OPUS or Publisher's site
© 2015 EuMA. Due to the abundance of ambient RF (Radio Frequency) energy, considerable research effort has been invested in RF energy scavenging. In this paper, we propose a rectifier which can be embedded into the building materials to provide a sustainable energy source in urban environments. The power will be available through DC sockets with different voltage settings. A highly sensitive and efficient rectifier operating at the FM frequency band is proposed which exhibits favorable impedance matching over a broad low input power range of-50 to-20 dBm (0.01 to 10 μW). Measurement results of input reflection coefficient and rectified output power are provided. An output DC power of around 11 μW is achieved from concurrently rectifying six tones of-20 dBm, providing a viable perpetual energy source for low power applications.
Bojovschi, A, Shariati, N & Ghorbani, K 2013, 'Analysis of a carbon fibre reinforced polymer slotted waveguide array fed by a loop type end launcher', Proceedings of the Asia-Pacific Microwave Conference Proceedings, APMC, Asia-Pacific Microwave Conference, IEEE, Seoul, South Korea, pp. 476-478.View/Download from: UTS OPUS or Publisher's site
The investigations of an end-launcher transition in Carbon Fibre Reinforced Plastic (CFRP) WR90 waveguides is presented. The applicability of the feed for CFRP slotted waveguide antenna is addressed. Some of the aspects pertaining to the efficiency of CFRP slotted waveguide antenna and its use for radar applications are discussed. The results are presented in comparison with those obtained from the same concepts implemented in aluminium waveguides. A recently implemented anisotropic model for CFRP laminates, which describes the electrical anisotropy of the composite material, was used. The data obtained provide promising indicators for the potential use of slotted waveguide antennas made of CFRP for radar applications. © 2013 IEEE.
Shariati, N, Rowe, WST & Ghorbani, K 2014, 'Highly sensitive rectifier for efficient RF energy harvesting', European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference, European Microwave Conference, IEEE, Rome, Italy, pp. 1190-1193.View/Download from: UTS OPUS or Publisher's site
© 2014 European Microwave Association. RF (Radio Frequency) energy harvesting is a promising technique to provide a sustainable energy source for the long-term conservation of the environment and the global economy. To address this, we proposed an efficient rectifier over a wide low input RF power range (-40 to -10 dBm) for broadcasting band (520- 590 MHz) to determine the usefulness of exploiting freely available RF energy sources in this band. The input reflection coefficient and rectified output power demonstrate the practical feasibility of this low-power rectification technique. Power conversion efficiency (PCE) of 53% and 1.5% are achieved for a single-tone input power of -10 dBm and -40 dBm respectively. Therefore, this innovative technique has the potential to generate a viable perpetual energy source for low power applications in urban environments.
Shariati, N, Rowe, WST & Ghorbani, K 2012, 'RF field investigation and maximum available power analysis for enhanced rf energy scavenging', European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012, Conference on European Microwave Week Connecting the World, pp. 329-332.View/Download from: UTS OPUS
RF energy harvesting is attracting widespread interest to meet the goal of providing sustainable energy sources for future growth and protection of the environment. In order to demonstrate the feasibility of RF energy harvesting, RF field investigations and analysis of maximum available power in the suburbs of Melbourne, Australia are conducted. Measurement results and analysis indicate that broadcasting system at 540 MHz (with 20 MHz bandwidth) and 100 MHz (88-108 MHz) are great scavenging sources. These frequency ranges provide stable RF signal levels and low propagation loss, produce maximum available power to a range of locations. In addition, broadcasting bands offer a great deal of flexibility to deploy simple and cost-effective implementations, which is of paramount importance for optimal power harvesting systems. © 2012 EUROPEAN MICROWAVE ASSOC.