Publications by German Augusto Ramirez Arroyave

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

Impact of Reader Sensitivity on Miniaturized Chipless Tag Detection

Anja Skrivervik, German Augusto Ramirez Arroyave

This work presents a magnetic near field-based RFID system in which a miniaturized RFID chipless tag of 1.65 mm2 is detected by two RFID readers (#Reader 1 and #Reader 2) of different sensitivity. The two readers are 7.5x7.5 mm2 tunable segmented square lo ...

Institute of Electrical and Electronics Engineers2025

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

Permittivity Sensors Based on Conventional and Complementary Split Ring Resonators

Anja Skrivervik, German Augusto Ramirez Arroyave

This work presents some considerations for the use of a Split Ring Resonator (SRR) and its dual structure, the Complementary Split Ring Resonator (CSRR), as permittivity sensing elements. The analytical circuit equivalents of both resonators are reviewed i ...

Institute of Electrical and Electronics Engineers2025

Estimating the Mutual Coupling of Microstrip Patch Antennas on Large Platforms Through Ray-Tracing

Anja Skrivervik, German Augusto Ramirez Arroyave, Hannes Bartle

The mutual coupling between antennas is an important parameter in multi-antenna systems that needs to be controlled in order to ensure the performance of all involved components. While full-wave simulations are accurate in estimating the mutual coupling, t ...

IEEE2025

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

Series-Fed Loop Antenna Array Deployable by a Scissors Mechanism

Anja Skrivervik, German Augusto Ramirez Arroyave

A series-fed loop antenna array, deployable by means of a scissors-type stretchable mechanism is presented. The antenna topology uses a continuous conductor with proper size to produce in-phase vertical currents that creates a highly directive pattern. The ...

IEEE2024

Tri-axial H-Field Sensor with Frequency-shaped Response in the band 400 MHz - 6 GHz

German Augusto Ramirez Arroyave

This contribution presents an isotropic field probe to assess human exposition to broadband magnetic fields in the 400 MHz to 6 GHz band according to the ICNIRP 2020 guidelines. This device complements the current practice in this band, based on the measur ...

IEEE2023

Isotropic Magnetic Field Probe with ICNIRP 2020 Frequency Shaping in the Band up to 400 MHz

German Augusto Ramirez Arroyave

We present the design and validation of an isotropic field probe with geometry and frequency response shaped to correctly weight the aggregate contribution of the various frequency components of a broadband magnetic field in the band 100 kHz - 400 MHz acco ...

IEEE2023