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RF Module
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Absorbed Radiation (SAR value) in a Human Head
The increasing use of wireless equipment has also increased the amount of radiation energy to which human bodies are exposed. A common property that measures absorbed energy is the SAR value, (specific absorption rate) to determine the amount of radiation that human tissue absorbs.
The human head...
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Balanced Patch Antenna for 6 GHz
Patch antennas are compact and easy to fabricate. The layout of the patch and the properties of the printed circuit board determine the radiation pattern.
This model is a full 3D simulation of a patch antenna. It finds the optimum radiation frequency, antenna impedance, and radiation pattern. It...
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Photonic 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 increase in integration density of several orders of magnitude....
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Three-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 example, to couple a transmitter and a receiver to a common antenna...
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Microwave 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 the heat redistributes in the foodstuff.
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Thermal 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 must be eliminated with filters that have a rather narrow pa...
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Band Gap Analysis of a Photonic Crystal
This model investigates the wave propagation in a photonic crystal that consists of GaAs pillars placed equidistant from each other.
The distance between the pillars determines a relationship between the wave number and the frequency of the light, which prevents light of certain wavelengths prop...
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Microwave Heating of Cancer Tumor
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 heating.
The purpose of this model is to compute the radiation...
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Simulation of an Electromagnetic Sounding Method for Oil Prospecting
The Sea Bed Logging method for oil prospecting has emerged as a promising technique during recent years. The method uses a mobile horizontal electric dipole transmitter and an array of seafloor electric receivers. The seafloor receivers measure the low frequency electrical field generated by the sou...
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Stress-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 splitting and pulse broadening. The goal is to minimize birefrin...
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