Anja Skrivervik

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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, Yuanyan Su, Maddalena Violetti

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, Yuanyan Su, Maddalena Violetti

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

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