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COMSOL simulates processors for fiber optics communicationCOMSOL simulates processors for fiber optics communication

Enablence Technologies Inc., Ottawa, ON, Canada
Required for simulating optical systems is the capacity to handle arbitrary geometries, individual and coupled processes, user-defined governing equations,...

Modeling Metamaterials Leads to Major BreakthroughModeling Metamaterials Leads to Major Breakthrough

Duke University, Durham, NC
In their efforts to use metamaterials to construct the world´s first working prototype of an invisibility cloak, researchers relied on modeling to lead them...

The Last Frontier in the Electromagnetics SpectrumThe Last Frontier in the Electromagnetics Spectrum

Rice University, Houston, TX
The least-explored region of the electromagnetic spectrum consists of terahertz waves, which at 100 GHz to 10 THz fall between microwaves and infrared light....

Simulations Key to Non-Lethal Microwave WeaponSimulations Key to Non-Lethal Microwave Weapon

SARA, Inc., Cyprus, CA
SARA, Inc. is using COMSOL Multiphysics project to develop an antenna that supports directed transmissions of high-power microwaves (hpms). Such is used in a...

Example Models

Microwave Cancer TherapyMicrowave Cancer Therapy

Electromagnetic heating is ideally suited for modeling in COMSOL Multiphysics. This model shows the area of hyperthermic oncology but the modeling issues and techniques are generally applicable to any problem involving electromagnetic...

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...

Photonic CrystalPhotonic Crystal

Photonic crystal devices are periodic structures of alternating layers of materials with different refractive indices. Waveguides that are confined inside of a photonic crystal can have very sharp low-loss bends, which may enable an...

Photonic Micro PrismPhotonic Micro Prism

To reduce radiative losses in photonic waveguide bends, a microprism can be used. If a microprism is placed between two waveguides forming a sharp bend, light will be guided between the waveguides, through the prism. This model...

Step Index FiberStep Index Fiber

The transmission speed of optical waveguides is superior to microwave waveguides, because optical devices have a much higher operating frequency than microwaves, enabling a far higher bandwidth. This model is an example of a single...

Stress-Optical Effects - with Generalized Plane Strain and in a Photonic WaveguideStress-Optical Effects - with Generalized Plane Strain and in a Photonic 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...

Thermal Drift in a Microwave Filter CavityThermal Drift in a Microwave Filter Cavity

Microwave filters are used to eliminate unwanted frequency components in the output from microwave transmitters. They are typically inserted between a power amplifier and an antenna. The amplifiers are nonlinear and produce harmonics that...

Balanced Patch Antenna for 6 GHzBalanced Patch Antenna for 6 GHz

Patch antennas are becoming more common in wireless equipment, like wireless LAN access points, cellular phones, and GPS handheld devices. The antennas are small in size and can be manufactured with simple and cost-effective techniques....

Second Harmonic Generation of a Gaussian BeamSecond Harmonic Generation of a Gaussian Beam

Laser systems are an important application area in modern electronics. With nonlinear materials it is possible to generate harmonics that are an even multiple of the frequency of the laser light. This model shows how a second harmonic...

Capacitance in a MicrostripCapacitance in a Microstrip

To illustrate how to calculate lumped parameters of capacitance, this model calculates such in a microstrip. The example shows the two different ways of calculating this: with a static analysis and with a time-harmonic analysis.

Three-Port Ferrite CirculatorThree-Port Ferrite Circulator

A microwave circulator is a multiport device in which a wave incident on Port 1 is coupled only into Port 2; a wave incident on Port 2 is coupled only into Port 3; and so on. Circulators are used to isolate microwave components, for...

Model of an RFID SystemModel of an RFID System

RFIDs are used in a multitude of applications such as tracking or identifying consumer products and their packaging. An RFID system consists of two main parts: A tag or transponder with a printed circuit-board (PCB) antenna A reader...

Microwave OvenMicrowave Oven

This is a model of the heating process in a microwave oven. The distributed heat source is computed in a stationary, frequency domain electromagnetic analysis followed. This is followed by a transient heat transfer simulation showing how...

Absorbed Radiation (SAR) in the Human BrainAbsorbed Radiation (SAR) in the Human Brain

Scientists use the SAR (specific absorption rate) to determine the amount of radiation that human tissue absorbs. This measurement is especially important for mobile telephones, which radiate close to the brain. The model studies how a...