RF & Microwave Engineering Blog Posts
2D Axisymmetric Model of a Conical Horn Antenna
Did you know that you can save time setting up your electromagnetics models by taking advantage of axisymmetry? We discuss the benefits of this approach using a conical horn antenna example.
Modeling a Complementary Split Ring Resonator with Ease
The Frequency Selective Surface, Periodic Complementary Split Ring Resonator tutorial model can be set up easily by taking advantage of periodic boundary conditions. Learn more here >>
AltaSim Simulates Mie Scattering of Electromagnetic Waves
Researchers from AltaSim Technologies used simulation to analyze the Mie scattering of electromagnetic waves and how it compares to the Mie solution. Get the full story >>
Modeling an RF Anechoic Chamber Using Periodic Structures
Anechoic chambers can be either acoustic or electromagnetic. These noise-canceling rooms are designed to absorb sound or electromagnetic waves. Simulation can be used to design these devices.
Powering Particle Physics Research at Fermilab
Researchers at Fermilab had an important question: Would upgrading the booster RF cavities in their particle accelerator cause them to overheat? To find answers, they turned to simulation…
Quick Intro to Modeling RF and Microwave Heating
If you’ve attended a COMSOL webinar about an RF topic, you’ve probably seen our model of a waveguide with a bend. That’s because it illustrates microwave heating in an easy-to-understand way.
Intro Model: Studying the Signal Strength of RF Coils
Electronics designers need to ensure that RF coils contained within their devices can properly transmit information from a source to its destination. Electromagnetics simulation can help.
Computing the Impedance of a Corrugated Waveguide
Did you know that you can compute the effective impedance for waveguides with nonuniform cross sections (such as corrugated waveguides) in COMSOL Multiphysics®? We demonstrate how here >>
Modeling a Branch Line Coupler
A branch line coupler is made up of 2 sets of coupled ports with a phase difference of 90° between them. Power enters through 1 input port and is then divided equally between 2 output ports.
Benchmark Model Results Agree with Fresnel Equations
Bright idea: When a ray of light (an electromagnetic wave) propagating through free space hits a dielectric medium, part of the light will be transmitted and part will be reflected.
Modeling Electromagnetic Waves and Periodic Structures
Oftentimes, it is of interest to model an EM wave (light, microwaves) incident upon periodic structures, such as diffraction gratings, metamaterials, and frequency selective surfaces.
The Linac-MR Project: Tumor Tracking and Treatment
Not too long ago, my colleague Jennifer wrote a blog post about the Cross Cancer Institute, and the research being conducted there into the design of a new device for treating cancerous tumors. The device, known as the Linac-MR, is revolutionary due to its ability to both image and treat cancer cells simultaneously — a capability that had previously been regarded as near impossible due to the conflicting physics interactions involved. Such a device would allow for extremely precise radiation […]