32 citations · 32 across the 24 of their papers we have counts for
25 papers
Soil Salinity Frequency-Dependent Prediction Model Using Electrical Conductivity Spectroscopy Measurement
Javad Jafaryahya, Rasool Keshavarz, Tarou Kikuchi +1
Soil salinity is a critical factor influencing agricultural productivity and environmental sustainability, requiring precise monitoring tools. This paper focuses on developing a fr…
A Data-Driven Review of Remote Sensing-Based Data Fusion in Precision Agriculture from Foundational to Transformer-Based Techniques
Mahdi Saki, Rasool Keshavarz, Daniel Franklin +3
This review explores recent advancements in data fusion techniques and Transformer-based remote sensing applications in precision agriculture. Using a systematic, data-driven appro…
Efficient Dual-Band Single-Port Rectifier for RF Energy Harvesting at FM and GSM Bands
Nastouh Nikkhah, Rasool Keshavarz, Mehran Abolhasan +2
This paper presents an efficient dual-band rectifier for radiofrequency energy harvesting (RFEH) applications at FM and GSM bands. The single-port rectifier circuit, which comprise…
Highly Sensitive Differential Microwave Sensor Using Enhanced Spiral Resonators for Precision Permittivity Measurement
Nastouh Nikkhah, Rasool Keshavarz, Mehran Abolhasan +2
This paper presents a highly sensitive microwave sensor for dielectric sensing. One of the main disadvantages of microwave resonant-based sensors is cross-sensitivity originated by…
Internet of Things Networks: Enabling Simultaneous Wireless Information and Power Transfer
Prerna Dhull, Andrea P. Guevara, Maral Ansari +3
The number of sensors deployed in the world is expected to explode in the near future. At this moment, nearly 30 billion Internet of Things (IoT) devices are connected and this num…
Compact Multi-Service Antenna for Sensing and Communication Using Reconfigurable Complementary Spiral Resonator
Ali Raza, Rasool Keshavarz, Eryk Dutkiewicz +1
In this paper, a compact multi-service antenna (MSA) is presented for sensing and communication using a reconfigurable complementary spiral resonator. A three turns complementary s…
Software-defined Programmable Metamaterial Lens System for Dynamic Wireless Power Transfer Applications
Eistiak Ahamed, Rasool Keshavarz, Daniel Franklin +1
A software-defined 2-bit Programmable Transmit Metamaterial (PTM) array surface with beam steering capabilities is proposed for indoor dynamic Wireless Power Transfer (DWPT) applic…
Multitone PSK Modulation Design for Simultaneous Wireless Information and Power Transfer
Prerna Dhull, Graduate Student Member, Dominique Schreurs +4
Far-field wireless power transfer, based on radio frequency (RF) waves, came into the picture to fulfill the power need of large Internet of Things (IoT) networks, the backbone of…
Compact Pixelated Microstrip Forward Broadside Coupler Using Binary Particle Swarm Optimization
Kourosh Parsaei, Rasool Keshavarz, Rashid Mirzavand Boroujeni +1
In this paper, a compact microstrip forward broadside coupler (MFBC) with high coupling level is proposed in the frequency band of 3.5-3.8 GHz. The coupler is composed of two paral…
Miniaturized Patch Rectenna Using 3-Turn Complementary Spiral Resonator for Wireless Power Transfer
Ali Raza, Rasool Keshavarz, Negin Shariati
A miniaturized linearly-polarized patch antenna is presented for Wireless Power Transfer (WPT) at 1. 8 GHz. The proposed antenna consists of a patch element and a 3-turn Complement…
Metamaterial-Inspired Quad-Band Notch Filter for LTE Band Receivers and WPT Applications
R. Keshavarz, Y. Miyanaga, M. Yamamoto +2
A new compact quad-band notch filter (QBNF) based on the extended composite right and left-handed transmission line (E-CRLH TL) has been presented. As known, E-CRLH TL behaves like…
Enabling Wireless Communications, Energy Harvesting, and Energy Saving by Using a Multimode Smart Nonlinear Circuit (MSNC)
Rasool Keshavarz, Dimitrios L. Sounas, Saeed Keshavarz +1
In this paper, a multimode smart nonlinear circuit (MSNC) for wireless communications (Tx and Rx modes) as well as energy harvesting (EH) and power saving is presented. The propose…
Ultra-Fast and Efficient Design Method Using Deep Learning for Capacitive Coupling WPT System
Rasool Keshavarz, Ehsan Majidi, Ali Raza +1
Capacitive coupling wireless power transfer (CCWPT) is one of the pervasive methods to transfer power in the reactive near-field zone. In this paper, a flexible design methodology…
Real-Time Discrete Fractional Fourier Transform Using Metamaterial Coupled Lines Network
Rasool Keshavarz, Negin Shariati, Mohammad-Ali Miri
Discrete Fractional Fourier Transforms (DFrFT) are universal mathematical tools in signal processing, communications and microwave sensing. Despite the excessive applications of DF…
High-Sensitivity and Compact Time-domain Soil Moisture Sensor Using Dispersive Phase Shifter for Complex Permittivity Measurement
Rasool Keshavarz, Negin Shariati
This paper presents a Time-Domain Transmissometry Soil Moisture Sensor (TDT-SMS) using a Dispersive Phase Shifter (DPS), consisting of an interdigital capacitor that is loaded with…
Low Profile Metamaterial Band-Pass Filter Loaded with 4-Turn Complementary Spiral Resonator for WPT Applications
Rasool Keshavarz, Negin Shariati
In this paper, a very compact and low insertion loss metamaterial band-pass filter (MBPF) at the center frequency of f0=730 MHz is proposed, based on the rectangular-shape 4 turn c…
Multidirectional Pixelated Cubic Antenna with Enhanced Isolation for Vehicular Applications
Md. Amanath Ullah, Rasool Keshavarz, Justin Lipman +2
This paper presents a pixelated cubic antenna design with enhanced isolation and diverse radiation pattern for vehicular applications. The design consists of four radiating patches…
Precision Agriculture: Ultra-Compact Sensor and Reconfigurable Antenna for Joint Sensing and Communication
Ali Raza, Rasool Keshavarz, Negin Shariati
In this paper, a joint sensing and communication system is presented for smart agriculture. The system integrates an Ultra-compact Soil Moisture Sensor (UCSMS) for precise sensing,…
Highly Sensitive Differential Microwave Sensor for Soil Moisture Measurement
Rasool Keshavarz, Justin Lipman, Dominique Schreurs +1
This paper presents a highly sensitive differential soil moisture sensor (DSMS) using a microstrip line loaded with triangular two turn resonator(T2 SR) and complementary of the re…
Highly Sensitive and Compact Quad-Band Ambient RF Energy Harvester
Rasool Keshavarz, Negin Shariati
A highly efficient and compact quad band energy harvester (QBEH) circuit based on the extended composite right and left handed transmission lines (ECRLHTLs) technique is presented.…
Dual-Band, Slant-Polarized MIMO Antenna Set for Vehicular Communication
Rasool Keshavarz, Dan Winson, Justin Lipman +2
Slant-polarized Multi Input Multi Output (MIMO) antennas are able to improve the performance of mobile communication systems in terms of channel capacity. Especially, the implement…
Autonomous Nonlinear Passive Transmit-Receive Switch for Compact IoT Devices: A Three-Port Agile Network
Rasool Keshavarz, Amber Abdullah, Negin Shariati
Recent advancements in RF technologies, especially Internet of Things (IoT) devices, require compact and integrated RF circulators or transmit-receive (TR) switches for efficient r…
Terahertz Digital Reconfigurable Metamaterial Array for Dynamic Beamforming Applications
Eistiak Ahamed, Rasool Keshavarz, Negin Shariati
A novel digital reconfigurable 2_bit metamaterial, equipped with a substrate integrated feeding system, is designed for industrial quality control applications within the terahertz…
Efficient Design of a Pixelated Rectenna for WPT Applications
Rasool Keshavarz, Md. Amanath Ullah, Ali Raza +1
This paper introduces a highly efficient rectenna (rectifying antenna) using a binary optimization algorithm. A novel pixelated receiving antenna has been developed to match the di…