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Blog Posts Tagged RF Module

Computing the Impedance of a Corrugated Waveguide

March 25, 2014

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

March 14, 2014

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

March 12, 2014

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

January 17, 2014

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.

Visualization for 2D Axisymmetric Electromagnetics Models

December 31, 2013

Today we’ll look at how to make 3D plots of vector fields that are computed using the 2D axisymmetric formulation found in the Electromagnetic Waves, Frequency Domain interface within the RF and Wave Optics modules.

The Linac-MR Project: Tumor Tracking and Treatment

December 30, 2013

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 […]

Research on Microwave Heating and Chemical Applications

November 8, 2013

There were many interesting posters at this year’s COMSOL Conference in Boston. A couple that caught my eye involved microwave heating and chemical applications. One of them showcases the use of microwave irradiation to speed up chemical reactions. Another — one of the recipients of the Best Poster award — used simulations to optimize their microreactor design with respect to microwave propagation.

Wilkinson Power Divider Simulation

October 11, 2013

A Wilkinson power divider is a common three-port power splitter circuit that is used to split an input signal into two equal output signals, or to combine two signals into one. Unlike resistive or T-junction power dividers, a Wilkinson power divider allows for nearly complete isolation between the two ports and adds no resistive losses to the power split. Because of these characteristics, a Wilkinson divider is widely used in radio communication systems due to its ability to prevent crosstalk […]


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