dr hab. inż. Krzysztof Nyka
- Associate professor at Department of Microwave and Antenna Engineering
- Department of Microwave and Antenna Engineering
- Faculty of Electronics, Telecommunications and Informatics
In this paper, we present a low-cost energy-efficient electronically steerable parasitic array radiator (ESPAR) antenna-based wireless sensor network (WSN) node designed for IEEE 802.15.4 standard that is capable of performing direction of arrival (DoA) estimation in real-life outdoor environments. To this end, we propose the WSN node architecture, design and realization that utilizes NXP JN5168 radio frequency (RF) wireless transceiver...
Diagonalized Macromodels in Finite Element Method for Fast Electromagnetic Analysis of Waveguide Components
A new technique of local model-order reduction (MOR) in 3-D finite element method (FEM) for frequency-domain electromagnetic analysis of waveguide components is proposed in this paper. It resolves the problem of increasing solution time of the reduced-order system assembled from macromodels created in the subdomains, into which an analyzed structure is partitioned. This problem becomes particularly relevant for growing size and...
An automatic reduction-order selection algorithm for macromodels in finite-element analysis is presented. The algorithm is based on a goal-oriented a posteriori error estimator that operates on low-order reduced blocks of matrices, and hence, it can be evaluated extremely quickly.
Obtained scientific degrees/titles
Obtained science degreedr hab. inż. Automation, electronics, electrical engineering and space technologies (Engineering and Technology)
Obtained science degreedr inż. Electronics and Telecommunications (Technology)
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