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RF Introductory Tutorial: Step by Step Modeling of a CoilRF Introductory Tutorial: Step by Step Modeling of a Coil

This is an introductory tutorial that shows how to model RF coils using COMSOL. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. This examples demonstrates the different...

Waveguide AdapterWaveguide Adapter

This model demonstrates microwave propagation in the transition from an elliptical to a rectangular waveguide. The aim is to keep the energy losses for the operating frequencies at a minimum. In this study, we consider a wave...

Coaxial to Waveguide CouplingCoaxial to Waveguide Coupling

Feeding a waveguide from a coaxial cable is a straightforward way to achieve electromagnetic waves inside a waveguide. Due to its small size and circular shape, the cable contributes significantly to the overall size of the problem. It is...

RF Heating of a Patch AntennaRF Heating of a Patch Antenna

This model considers a patch antenna structure. A patch antenna is composed of two parallel metal plates separated by a dielectric. The dielectric has some losses, and these losses cause the structure to heat up. The objective of this...

RF Introductory Tutorial: Step by Step Modeling of a Dipole AntennaRF Introductory Tutorial: Step by Step Modeling of a Dipole Antenna

This is an introductory tutorial that shows how to model a dipole antenna using the COMSOL RF Module. A dipole antenna is one of the simplest antenna structures, and many radiating structures can be modeled in similar ways to the...

Stress-Optical Effects in WaveguideStress-Optical Effects in Waveguide

Planar photonic waveguides in silica (SiO2) have a great potential for use in wavelength routing applications. The major problem with these kinds of waveguides is birefringence. Anisotropic refractive indices result in fundamental mode...

Conical AntennaConical Antenna

Conical antennas are useful for many applications due to their broadband characteristics and relative simplicity. In this example, we study the antenna impedance and radiation pattern as functions of frequency for a monoconical...

Electromagnetic and Structural Analysis of a Microwave Filter on a PCBElectromagnetic and Structural Analysis of a Microwave Filter on a PCB

Microstrip filters can be fabricated directly on a printed circuit board (PCB) with a microstrip line going from the input to the output. Along the microstrip line there are a number of stubs of certain lengths and widths. The design of...

H-Bend WaveguideH-Bend Waveguide

The transmission of a TE10 wave through a 90 degree bend in a waveguide is modeled.

MRI Bird-Cage CoilMRI Bird-Cage Coil

A bird-cage coil is used in Magnetic Resonance Imaging (MRI) applications as a receiving antenna. This particular coil would sit around limbs and be used to scan a leg or arm. The COMSOL Multiphysics with RF Module model...


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