Electrical Blog Posts
Simulating Antenna Crosstalk on an Airplane
As communication systems in aviation become more complex, multiple antennas are often placed on the same airplane. This creates crosstalk, or cosite interference, which occurs between the antennas and can disturb the operation of the aircraft. The Antenna Crosstalk on an Airplane’s Fuselage tutorial model shows that you can simulate the interference between two identical antennas — one transmitting and one receiving — to analyze the crosstalk effect on an aircraft.
Evaluating a UHF RFID Tag Design with Simulation
COMSOL Multiphysics version 5.1 introduces a new tutorial model of a UHF RFID tag. RFID tags allow you to identify and monitor both inanimate objects and living creatures through the use of electromagnetic fields. The UHF RFID tag has a wider range than other types of RFID tags and is often used to identify animals. We can evaluate the performance of the tag through an analysis of the electric field and far-field radiation pattern.
The Boltzmann Equation, Two-Term Approximation Interface
In a previous blog post, we introduced readers to different kinds of electron energy distribution functions (EEDFs) and their importance in plasma modeling. Today, we focus our attention on the Boltzmann Equation, Two-Term Approximation interface, demonstrating its use with an example from our Model Library.
Vivaldi Antenna Design Analysis
The Vivaldi antenna, also known as the tapered slot antenna (TSA), is an ideal antenna for wide-band applications. It stands out due to its uncomplicated structure, simple manufacturing requirements, and high gain. When working on a Vivaldi antenna design, we can use simulation software to evaluate its far-field pattern and impedance.
Modeling with Linearly Polarized Plane Waves
COMSOL Multiphysics version 5.0 introduced users to a new background field feature designed for linearly polarized plane waves. Explore the use of this new feature with an example of polarization-dependent scattering from our Model Gallery.
Modeling Current Distributions in a Molten Salt Electro-Refiner
Today, we welcome a new guest blogger, Alexandre Oury of SIMTEC. He discusses the analysis of current distributions in a molten salt electro-refiner. In a webinar highlighting electrochemical recycling processes, SIMTEC presented a computational approach for predicting current distributions in a molten salt electro-refiner. The three main types of current distribution (primary, secondary, and tertiary) were treated, with a particular emphasis on the first two types. Using COMSOL Multiphysics, we implemented primary and secondary current distributions in an electrolysis cell.
Ports and Lumped Ports for Wave Electromagnetics Problems
When using the COMSOL Multiphysics software to simulate wave electromagnetics problems in the frequency domain, there are several options for modeling boundaries through which a propagating electromagnetic wave will pass without reflection. Here, we will look at the Lumped Port boundary condition available in the RF Module and the Port boundary condition, which is available in both the RF Module and the Wave Optics Module.
Using Numeric TEM Ports in Your Modeling Processes
COMSOL Multiphysics version 5.0 introduced users to an improved “Numeric TEM port” feature for transmission lines. This feature includes enhanced functionality, utilizing the techniques behind the calculation of impedance in 2D models and applying them in 3D instances.
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