32 citations · 32 across the 21 of their papers we have counts for
15 papers · 1 filter
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…
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…
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…
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 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…
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…