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Electromagnetic Wave & Static Applications
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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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Simulating a Generator in 3D
The generator analyzed in this model consists of a rotor with permanent magnets and a nonlinear magnetic material inside a stator of the same magnetic material.
The model calculates the static magnetic fields inside and around the generator.
The nonlinearity of the magnetic material is modele...
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RF-Heated Hot Wall Furnace for Semiconductor Processing
Furnace reactors are used in the fabrication of semiconductor industry to grow layers on the wafers. These can also be used for epitaxial growth, which is a key technology for fabrication of electrical devices. For the wide band gap silicon carbide substance growth takes place in graphite susceptor...
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Microresistor Beam
The example illustrates the ability to couple thermal, electrical, and structural analysis in the one model. This particular application displaces part of a beam by passing a current through it; the current generates heat, and the temperature increase leads to displacement through thermal expansion....
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Model of an RFID System
An RFID system consists of two main parts:
A tag or transponder with a printed circuit-board (PCB) antenna
A reader unit with a larger RF antennaThe reader antenna generates an electromagnetic field that energizes a chip (IC-circuit) inside the tag. The electromagnetic field is modulated by the ta...
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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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Semiconductor Diode
A semiconductor diode consists of two regions with different doping: a p-type region with a dominant concentration of holes, and an n-type region with a dominant concentration of electrons.
The model presented here formulates the problem using three dependent variables: psi (electric potential),...
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MOS Transistor Model
The MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) is by far the most common semiconductor device, and the primary building block in all commercial processors, memories, and digital integrated circuits. During the past decades this device has experienced tremendous development, and today...
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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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