Osaka University researchers develop a computational algorithm for describing electromagnetic noise in electric circuits using a method based on electromagnetic studies and circuit theory
In order to design noiseless electromagnetic (EM) devices, it is necessary to clarify the mechanism behind EM noise and theoretical calculations and computer simulations are performed for prediction assessment of devices.
Two researchers at Osaka University developed an algorithm for numerical calculation of EM noise (interference) in electric circuits.
EM noise is a problem that has proven to be difficult to solve. Caused by interference from transmission lines and connecting parts, various approaches have been taken to reduce it, such as adding filters and/or passive devices to circuits or using the symmetry of the configuration.
The algorithm developed in this study is for computer simulation of electric circuits in which transmission lines are connected with lumped element models. Usually, the solution of problems along a transmission line is performed using partial differential equations, while the solution of problems in a lumped constant circuit uses ordinary differential equations.
In order to connect these two different differential equations and solve these problems, the pair of researchers, Prof. Masayuki Abe and Prof. Hiroshi Toki, introduced the incidence matrix found in circuit theory and time domain impedance, the latter of which is a new concept.
Previously, this solution required a method to replace lumped constant circuits with transmission lines, but this new method does not require such a replacement, allowing for more practical calculations. The results of this research were published in Scientific Reports.
Based on the results of calculations using this algorithm, the two researchers demonstrated that EM noise could be reduced by using the symmetric 3-line configuration of the circuit. Their calculation method is for one-dimensional multi-conductor transmission lines, but they have already developed a calculation algorithm in two- and three-dimensional multi-conductor transmission lines (patent pending) as well, making it possible to advance its applied research.
This calculation method can also be developed into a calculation method for the retarding effects of EM noise (and signals), which are difficult to calculate via conventional computer simulations. Currently, the researchers are developing a computational algorithm for calculating these retarding effects.
In addition to analysis of time and frequency domains of EM noise, this algorithm will be used for various applications, such as generation of heat by noise, metamaterials, and antenna analysis.
"Eventually, we aim to develop an 'EM noise-less infrastructure.' In addition to improving device performance, we'd like to realize a society in which people can use high value-added equipment, such as equipment with ultra-low power consumption and ultra-low waste heat," says Prof. Abe. "Specifically, we will theoretically clarify a noiseless structure of electronic circuits and demonstrate that drastic reduction of EM noise can lead to a breakthrough that allows for low power consumption."
Prof. Toki says, "Our goal is to use our method to develop advanced technology into general purpose technology and establish guidelines for developing the concept of noiseless electronic devices into projects with both social and economic impact."
The article, "Theoretical Study of Lumped Parameter Circuits and Multiconductor Transmission Lines for Time-Domain Analysis of Electromagnetic Noise" was published in Scientific Reports at DOI: https:/
About Osaka University
Osaka University was founded in 1931 as one of the seven imperial universities of Japan and now has expanded to one of Japan's leading comprehensive universities. The University has now embarked on open research revolution from a position as Japan's most innovative university and among the most innovative institutions in the world according to Reuters 2015 Top 100 Innovative Universities and the Nature Index Innovation 2017. The university's ability to innovate from the stage of fundamental research through the creation of useful technology with economic impact stems from its broad disciplinary spectrum.
Saori Obayashi | EurekAlert!
Plant identification increased tenfold with Flora Incognita App in March
03.04.2020 | Technische Universität Ilmenau
AI finds 2D materials in the blink of an eye
02.04.2020 | Institute of Industrial Science, The University of Tokyo
Drops of water falling on or sliding over surfaces may leave behind traces of electrical charge, causing the drops to charge themselves. Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz have now begun a detailed investigation into this phenomenon that accompanies us in every-day life. They developed a method to quantify the charge generation and additionally created a theoretical model to aid understanding. According to the scientists, the observed effect could be a source of generated power and an important building block for understanding frictional electricity.
Water drops sliding over non-conducting surfaces can be found everywhere in our lives: From the dripping of a coffee machine, to a rinse in the shower, to an...
90 million-year-old forest soil provides unexpected evidence for exceptionally warm climate near the South Pole in the Cretaceous
An international team of researchers led by geoscientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) have now...
The bacteria that cause tuberculosis need iron to survive. Researchers at the University of Zurich have now solved the first detailed structure of the transport protein responsible for the iron supply. When the iron transport into the bacteria is inhibited, the pathogen can no longer grow. This opens novel ways to develop targeted tuberculosis drugs.
One of the most devastating pathogens that lives inside human cells is Mycobacterium tuberculosis, the bacillus that causes tuberculosis. According to the...
An international team with the participation of Prof. Dr. Michael Kues from the Cluster of Excellence PhoenixD at Leibniz University Hannover has developed a new method for generating quantum-entangled photons in a spectral range of light that was previously inaccessible. The discovery can make the encryption of satellite-based communications much more secure in the future.
A 15-member research team from the UK, Germany and Japan has developed a new method for generating and detecting quantum-entangled photons at a wavelength of...
Together with their colleagues from the University of Würzburg, physicists from the group of Professor Alexander Szameit at the University of Rostock have devised a “funnel” for photons. Their discovery was recently published in the renowned journal Science and holds great promise for novel ultra-sensitive detectors as well as innovative applications in telecommunications and information processing.
The quantum-optical properties of light and its interaction with matter has fascinated the Rostock professor Alexander Szameit since College.
02.04.2020 | Event News
26.03.2020 | Event News
23.03.2020 | Event News
03.04.2020 | Materials Sciences
03.04.2020 | Life Sciences
03.04.2020 | Life Sciences