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Anja Skrivervik

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Publications associées (256)

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Modified Huygens Source for Maximum Gain of Implanted Antenna

Jiajun Li, Anja Skrivervik

Implanted antennas are a key part of wireless implanted medical devices. However, the lossy nature of the surrounding body tissue significantly reduces their radiation efficiency and gain. Therefore, it is important to maximize the power reaching free spac ...

IEEE2025

Bloch wave approach to the design of optimally matched non-effective medium composite right/left handed transmission lines

Anja Skrivervik, Julien Perruisseau-Carrier

A simple method to design optimally matched composite right-/left-handed transmission lines (CRLH-TLs), based on the computation of the Bloch wave equivalent impedance of the corresponding unit cell circuit is presented. Although the matching of CRLH-TLs t ...

2007

Tunable Segmented Loop Antenna Reader for Miniaturized Chipless Tag Detection

Anja Skrivervik, Adrián Fernández Carnicero

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

New miniaturized microwave cavity for Rubidium atomic clocks

Anja Skrivervik, Jean-François Zürcher, Francesco Merli, Maddalena Violetti

Nowadays there is an increasing need for radically miniaturized and low-power atomic frequency standards, for use in mobile and battery-powered applications. For the miniaturization of double-resonance (DR) Rubidium (Rb-87) atomic clocks, the size reductio ...

Ieee2012

Monte-Carlo Method for EMF Exposure Distribution Assessment in 5G Base Station

Anja Skrivervik, Tingyong Jiang

This paper proposes a studied case to assess the EMF (electromagnetic field) exposure distribution for a specific deployment scenario. This developed novel approach based on a Monte-Carlo (MC) approach took into account the non-uniform user distribution an ...

IEEE2022

Design of antenna based microwave sensors for blade tip clearance measurement in gas turbine

Anja Skrivervik, Jean-François Zürcher, Maddalena Violetti

Real time tip clearance measurement in gas turbines and other rotating machinery is an interesting way to provide enhanced reliability, cost effective maintenance and more overall safety. This paper presents a novel microwave sensor for blade tip clearance ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Circuit model and design of silicon-integrated CRLH-TLS analogically controlled by MEMS

Anja Skrivervik, Julien Perruisseau-Carrier

We present an integrated composite right/left handed transmission line (CRLH-TL) phase shifter analogically controlled by means of a MEMS series capacitor. The device is based on coplanar waveguide (CPW) technology and operates at a central frequency of 18 ...

2006

Design of a novel wide-angle Rotman lens beamformer for 5G mmWave applications

Anja Skrivervik

The attachment of 5G with millimeter wave (mmWave) frequencies offers massive capacity and low latency to reveal the full 5G experiences. High directive gain and beamforming are considered essential for mmWave 5G systems. The main requirements of the beamf ...

Nature Portfolio2024

Assessment of the Electromagnetic Field Exposure due to 5G Base Stations using a Monte-Carlo Method: Initial Results

Anja Skrivervik, Tingyong Jiang

The realistic assessment of the Electromagnetic Field exposure due to wireless telecommunication base stations is critical to protect the population from harm due to excessive exposure, and allow wireless service providers to use the available technology i ...

IEEE2021

Microwave cavities for dual resonance atomic clocks

Anja Skrivervik, Yuanyan Su

Dual resonance Rubidium atomic clock requires a microwave resonator tuned to the frequency of the hyperfine transition of the Rubidium 87 isotope. The vapor cell containing the Rubidium atoms is placed within this resonator. In order to achieve a good cloc ...

Institute of Electrical and Electronics Engineers Inc.2023

Narrowband and Broadband Liquid Phantoms of Gastrointestinal Tissues

Anja Skrivervik

Wireless capsule endoscopy (WCE) has emerged as a promising alternative to traditional endoscopic procedures. However, these systems cannot be accurately assessed due to the lack of affordable and readily available gastrointestinal tissue phantoms. With th ...

Institute of Electrical and Electronics Engineers Inc.2025

Design of atomic clock cavity based on a loop-gap geometry and modified boundary conditions

Anja Skrivervik, Anton Evgeniev Ivanov

In this study, we investigate a concept that can be used to improve the magnetic field homogeneity in a microwave cavity applied in a novel, high-performance atomic frequency standard. We show that by modifying the boundary conditions in the case of a loop ...

2017

Ramsey Spectroscopy in a Micro-Fabricated Rb Vapor Cell for Miniature Atomic Clocks

Anja Skrivervik, Yuanyan Su

We present a prospective experimental study on double-resonance Ramsey spectroscopy in a micro fabricated Rb vapor cell, in view of future miniature atomic clocks with improved stability performance. Ramsey signals with a narrow central fringe width of 1.5 ...

IEEE2021

Omnidirectional pulse dispersion of planar circular monopoles

Anja Skrivervik, Jean-François Zürcher

Three antenna systems, composed of circular monopoles with different ground plane sizes, are studied. The transmission of an UWB pulse between two identical monopoles is analyzed. The omnidirectional properties of the UWB antennas are measured and simulate ...

2009

Double resonance spectroscopic studies using a new generation of microfabricated microwave cavity

Anja Skrivervik, Jean-François Zürcher, Maddalena Violetti

We evaluate the potential of a new generation microwave cavity by double resonance spectroscopic studies. Both, the cell and the microwave cavity are microfabricated. This allows a substantial size reduction for the physics package, without compromising th ...

IEEE2013

Diminishing SAR for Wearable UHF Antennas

Anja Skrivervik, Jovanche Trajkovikj

This letter presents a study on the specific absorption rate (SAR) evaluation of UHF wearable antennas. A planar inverted-F antenna (PIFA) intended to operate in wireless body area networks (WBANs) is taken as an example for the investigation. The presence ...

Institute of Electrical and Electronics Engineers2015

A Low Profile UWB Antenna for Wearable Applications: The Tripod Kettle Antenna (TKA)

Anja Skrivervik, Roberto Torres Sánchez, Jovanche Trajkovikj

A new low profile ultra-wideband (UWB) antenna for wearable applications is presented. Its structure is derived from the quadripod kettle antenna (QKA) [1], and is called tripod kettle antenna (TKA). The proposed antenna is very well suited for wearable ap ...

Ieee2013

Analysis of UWB antennas for carrier-based UWB impulse radio

Anja Skrivervik

A Carrier-based UWB pulse is compared with the commonly used Gaussian pulse. Two antenna systems are simulated and measured in frequency domain. The impulse response and the Power Spectral Density (PSD) of both studied pulses are obtained. The effect of ea ...

2007

In-body Antennas Design Based on Fundamental Limits of Obtainable Power Density

Anja Skrivervik

In-body medical implants are one of the most promising solutions for increasing patient healthcare in the future. Many such devices already exist, however, each new design is a challenge due to size constraints and communication issues which arise due to s ...

IEEE2021

15 years of terminal antenna design at LEMA: an overview

Anja Skrivervik, Jean-François Zürcher

2007