Recherche

Afficher tous les résultats pour

Accueil

Personne

Anja Skrivervik

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (256)

Link Budget Estimation for Implantable Antennas: From In-Body Coupling to Free-Space Radiation

Anja Skrivervik, Mingxiang Gao, Sujith Raman

In wireless communication systems, the Friis transmission equation is commonly used to quickly estimate wireless transmission efficiency between the transmitter and the receiver. In the case of wireless implantable bioelectronic systems, the gain of the im ...

Institute of Electrical and Electronics Engineers Inc.2024

Stored Energies and Q-Factor Expressed in Material Derivatives

Anja Skrivervik

Stored energies of radiating systems have generated research interest for several decades due to their relationship with Q-factor and fractional bandwidth. In this letter, material derivatives are used to provide a new interpretation of widely used stored ...

2024

A mmWave Low Complexity and Low-Cost Super Wideband Dual-Polarized Aperture Coupled Antenna for 5G Applications

Anja Skrivervik, Abolfazl Azari

Advanced antenna system (AAS) is a viable option for 5G millimeter-wave (mmWave) applications. AAS single element is favored to be dual-polarized, wideband, high gain, and compact in order to be utilized for 5G antenna arrays. In this paper, a low complexi ...

Ieee-Inst Electrical Electronics Engineers Inc2024

Compact Irregular Conformal Phased Array: High-Gain Wide-Scan Onboard System for Enhancing UAV Communication

Anja Skrivervik, Yuanyan Su

This paper proposes a compact non-canonical non-uniform conformal phased array antenna (NNCPAA) attached to an irregular UAV surface to overcome the space and aerodynamic constraints for high-gain, wide-scan applications. The NNCPAA is parametrically deter ...

2024

Maximum Radiation Efficiency of Arbitrarily Shaped Implantable Antennas

Anja Skrivervik, Mingxiang Gao

Performance limitations for implanted antennas, taking radiation efficiency as the metric, are presented. The performance limitations use a convex optimization procedure with the current density inside the implant acting as its degree of freedom. The knowl ...

2024

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

Tunable Segmented Loop Antenna Reader for Miniaturized Chipless Tag Detection

Anja Skrivervik

This paper presents a 7.5 × 7.5 mm 2 tunable segmented square loop reader antenna working in UHF band for magnetic near field RFID applications. The proposed reader is combined with a post-processing method based on frequency sweep envelope (FSE) for detec ...

IEEE2024

LEMAC: LTF-EPFL Miniature Atomic Clock Demonstrator Performance Evaluation

Anja Skrivervik, Maddalena Violetti, Yuanyan Su

We report on the performance evaluation of the LEMAC miniature atomic clock, based on the optical-microwave Double-Resonance (DR) scheme, implementing a micro-fabricated Rb vapor cell held inside a custom-designed micro-loop-gap microwave resonator (μ-LGR) ...

Institute of Electrical and Electronics Engineers Inc.2024

Micro-Loop-Gap Microwave Resonator Development for the LEMAC LTF-EPFL Miniature Atomic Clock

Anja Skrivervik, Maddalena Violetti, Yuanyan Su

This paper discusses several evolved micro-loop-gap microwave resonator designs for chip-scale atomic clock applications. Two different schemes have been investigated to develop the LEMAC (LTF-EPFL Miniature Atomic Clock) based on the optical-microwave dou ...

Institute of Electrical and Electronics Engineers Inc.2024

Design Recommendations for Minimal Antenna Mutual Coupling Using Current Optimization

Anja Skrivervik, Hannes Bartle

This work addresses a first attempt at using current density optimization algorithms to gain insight into the relation between maximum achievable gain in a given direction and the mutual coupling to another antenna nearby. The methodology is presented on t ...

IEEE2024

Analytic Approximation of Free-Space Path Loss for Implanted Antennas

Anja Skrivervik, Mingxiang Gao, Sujith Raman

Implantable wireless bioelectronic devices enable communication and/or power transfer through RF wireless connections with external nodes. These devices encounter notable design challenges due to the lossy nature of the host body, which significantly dimin ...

2024

Code for project entitled "study on conformal antennas, proof of concept prototype for a UAV"

Anja Skrivervik, Yuanyan Su

This code is used for developing the project entitled “Study on conformal antennas, proof of concept prototype for a UAV”, from the aspects of theory, design, and implementation. This code aims to speed up the investigation of an arbitrary phased array ant ...

Zenodo2024

Recipes for different tissue phantoms at narrowband and broadband frequency ranges

Anja Skrivervik, Sujith Raman

This dataset includes: A PDF document explaining the performed permittivity measurements of different salt solutions (PBS and EBSS) and cell culture media (DMEM, DMEM+10% FBS, RPMI and RPMI + 10% FBS) that are often used in cell culture experiments as well ...

Zenodo2024

Conformal Beam-Scanning Arrays: Survey, analysis, and benchmarking

Anja Skrivervik

Conformal antenna arrays can fit seamlessly on curved 3D-shaped surfaces, which are found ubiquitously on vehicles, aircraft, the human body, and so on. Another advantage of the nonplanar structures is their ability to overcome the scan loss limitations of ...

2024

Wireless, battery-free, and real-time monitoring of water permeation across thinfilm encapsulation

Yves Leterrier, Anja Skrivervik, Stéphanie Lacour, James Daniel Rosenthal, Mingxiang Gao, Massimo Mariello

Long-term bioelectronic implants require stable, hermetic encapsulation. Water and ion ingress are challenging to quantify, especially in miniaturized microsystems and over time. We propose a wireless and battery-free flexible platform leveraging backscatt ...

Springer Science and Business Media LLC2024

A 3 mm2, Energy-Efficient, Multi-Data-Rate, FDMA Transmitter with On-Chip Antenna for Next-Generation Neural Implants

Anja Skrivervik, Mahsa Shoaran, Mingxiang Gao, Cong Ding

This paper presents a versatile energy-efficient wireless transmitter (TX) for neural implants with high/ultrahigh channel counts. The TX supports a wide range of data transmission rates, from 50Mb/s to 1.2 Gb/s, through a novel dual-modulation approach. O ...

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

Analytical Model for Calculating Gain Pattern of Antennas Implanted in Large Host Bodies

Anja Skrivervik, Mingxiang Gao, Sujith Raman

This communication presents a method for the fast and accurate estimation of the gain pattern and maximum gain of an implanted antenna including the effect of the host body, under the assumption that the latter is electrically large. The estimation procedu ...

2024

Wide scan angle multibeam conformal antenna array with novel feeding for mm-wave 5G applications

Anja Skrivervik

This paper presents a low-profile wide scan angle multibeam conformal antenna array system with a novel feeding network for 28 GHz mm-wave 5G applications. The proposed antenna system utilizes two conventional branch-line couplers as its beamforming networ ...

2024

A 49.8mm2 Fully Integrated, 1.5m Transmission-Range, High-Data-Rate IR-UWB Transmitter for Brain Implants

Anja Skrivervik, Mahsa Shoaran, Mingxiang Gao, Cong Ding

Implantable neural interfaces hold great potential to restore function in individuals impaired by paralysis, limb amputations, or various neurological conditions. The need for precise mapping of neuronal activity across various brain regions and enhancing ...

IEEE2024

Page 2 sur 13