A review on antenna technologies for ambient RF energy harvesting and wireless power transfer: Designs, challenges and applications

MA Ullah, R Keshavarz, M Abolhasan, J Lipman… - IEEE …, 2022 - ieeexplore.ieee.org
Radio frequency energy harvesting (RFEH) and wireless power transmission (WPT) are two
emerging alternative energy technologies that have the potential to offer wireless energy …

Internet of things 2.0: Concepts, applications, and future directions

I Zhou, I Makhdoom, N Shariati, MA Raza… - IEEE …, 2021 - ieeexplore.ieee.org
Applications and technologies of the Internet of Things are in high demand with the increase
of network devices. With the development of technologies such as 5G, machine learning …

Highly sensitive and compact quad-band ambient RF energy harvester

R Keshavarz, N Shariati - IEEE Transactions on Industrial …, 2021 - ieeexplore.ieee.org
A highly efficient and compact quad-band energy harvester (QBEH) circuit based on the
extended composite right-and left-handed transmission lines (E-CRLH TLs) technique is …

Design and implementation of low loss and compact microstrip triplexer using CSRR loaded coupled lines

S Keshavarz, A Abdipour, A Mohammadi… - … -International Journal of …, 2019 - Elsevier
In this paper, a passive S-band triplexer using complementary split ring resonators (CSRRs)
etched on the ground plane and interdigital capacitor in the upper metal is presented. The …

Highly sensitive differential microwave sensor for soil moisture measurement

R Keshavarz, J Lipman, DMMP Schreurs… - IEEE Sensors …, 2021 - ieeexplore.ieee.org
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 …

Electrically controllable composite right/left-handed leaky-wave antenna using liquid crystals in PCB technology

BJ Che, T Jin, D Erni, FY Meng… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
A design method for electrically controllable composite right/left-handed (CRLH) leaky-wave
antennas (LWAs) with large beam-steering range employing liquid crystal (LC) in printed …

High-sensitivity and compact time domain soil moisture sensor using dispersive phase shifter for complex permittivity measurement

R Keshavarz, N Shariati - IEEE Transactions on Instrumentation …, 2021 - ieeexplore.ieee.org
This article 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 a …

Linearity improvement of a dual-band Doherty power amplifier using E-CRLH transmission line

R Keshavarz, A Mohammadi, A Abdipour - AEU-International Journal of …, 2021 - Elsevier
A dual-band Doherty power amplifier (DB-DPA) using the extended composite right and left
handed transmission lines (E-CRLH TL) is proposed. In this structure the λ/4 transmission …

Low profile metamaterial band-pass filter loaded with 4-turn complementary spiral resonator for WPT applications

R Keshavarz, N Shariati - 2020 27th IEEE International …, 2020 - ieeexplore.ieee.org
In this paper, a very compact (0.03 λg× 0.18 λg) and low insertion loss (<; 0.4 dB)
metamaterial band-pass filter (MBPF) at the center frequency of f 0= 730 MHz is proposed …

Metamaterial-inspired quad-band notch filter for LTE band receivers and WPT applications

R Keshavarz, Y Miyanaga, M Yamamoto… - … Symposium of the …, 2020 - ieeexplore.ieee.org
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 …