Publications by Amir Mohsen Ahmadi Najafabadi

Novel 2-D Beamsteerable Rectenna with Improved Power Receptivity for mm-Wave RF-WPT Applications

Anja Skrivervik, Denys Nikolayev, German Augusto Ramirez Arroyave, Amir Mohsen Ahmadi Najafabadi

This paper introduces a novel 2-D beam-steerable rectenna designed for mm-wave RF wireless power transfer (RF-WPT) applications. The 2-D beamsteering capability of the proposed rectenna is achieved by integrating an on-chip 4 × 4 Butler matrix, which is co ...

2025

Multibeam dielectric rod antenna for mm-wave wireless power transfer

Anja Skrivervik, German Augusto Ramirez Arroyave, Amir Mohsen Ahmadi Najafabadi

This paper presents a multibeam dielectric rod antenna for mm-wave wireless power transfer (WPT) applications. The proposed solution utilizes its unique multibeam setup which allows the generation of adjustable beams simultaneously, without the need for an ...

2025

Compact Dual-Polarized Multibeam Switch Integrated Antenna System for 5G mm-Wave Applications

Amir Mohsen Ahmadi Najafabadi

In this paper, a novel microstrip, single-layer, Lshaped series fed antenna array, with 12 elements operating at 28 GHz, is proposed. The antenna can switch its beam in 8 different directions covering 4 different azimuthal Φ cuts; which is accomplished usi ...

2025

Multibeam Antenna with Low Beam Squint for mm-Wave 5 G Handset Applications

Anja Skrivervik, Amir Mohsen Ahmadi Najafabadi

In this letter, a novel series-fed periodic microstrip antenna array with reduced beam squint is proposed for the 28 GHz mm-wave 5G band. To mitigate beam squint, the design reduces the dispersion in the unit cell by introducing an L-shaped slot pair on an ...

Institute of Electrical and Electronics Engineers (IEEE)2025

Hedgehog Shell: Multibeam DRA with 2-D Beamsteering for mm-Wave Applications

Anja Skrivervik, German Augusto Ramirez Arroyave, Amir Mohsen Ahmadi Najafabadi

This paper investigates a low-cost method to form a multibeam antenna with 2-D beamsteering capability. The simple feeding method employed in this solution enables the dielectric rod antennas to generate multiple beams in the intended direction simultaneou ...

2025

Plug-in Plug-Out Multibeam Dielectric Rod Antenna for Target Dedicated mm-Wave RF-WPT Applications

Anja Skrivervik, German Augusto Ramirez Arroyave, Amir Mohsen Ahmadi Najafabadi

This paper introduces a beam-adjustable multibeam dielectric rod antenna for mm-wave RF-WPT applications. The unique multibeam setup allows the generation of several adjustable beams simultaneously. This is conceptualized by utilizing three and five rods t ...

IEEE2024

A 24-GHz 4-Element Multi-Beam Wireless Energy Harvesting Array with Class-F Rectifiers Achieving 51.5% PCE

Amir Mohsen Ahmadi Najafabadi

This study introduces a 24GHz 4-element concurrent multi-beam energy harvesting array, distinguished by the implementation of a novel three-line-coupler to simultaneously perform matching and harmonic shaping, achieving the best reported rectifier power co ...

IEEE2024