Optimizing Planar Coils for PCBs with Electromagnetics Simulation

Bridget Paulus January 11, 2019

From blood pressure sensors to electronic money cards, planar coils are widely used. Found on circuit boards, these coils are a good choice for inductive coupling, especially when space is limited. When designing these coils, it’s important to calculate both their inductance and resistance, as these factors play a key role in the device’s performance. To do just that, engineers can use layered shell functionality in the COMSOL® software, which enables them to model all coils on one plane.

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Chien Liu December 27, 2018

Carrier dynamics plays an important role in the transient behavior and frequency response of semiconductor devices. Here, we use two tutorial models of PIN rectifiers in the Semiconductor Module, an add-on to the COMSOL Multiphysics® software, to demonstrate the simulation of dynamical effects.

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Emily Ediger December 25, 2018

Optimizing the food dehydration process can be tricky, but it is helpful and necessary for areas with food shortages. In his keynote presentation at the COMSOL Conference 2018 Lausanne, Thijs Defraeye of Empa discussed how his team uses multiscale modeling to understand the drying process for soft cellular foods. If you missed his talk, you can watch a video recording of the presentation and read a summary below.

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Jinlan Huang December 20, 2018

Piezoelectric devices are widely used as sources to generate sound waves or receivers to detect acoustic signals. In applications such as ultrasound imaging and nondestructive testing, the same transducer can be used as a transmitter to send a source signal and receiver to detect echoes. Modeling these devices often requires transient analyses with time of flight as output. Let’s discuss how to use the COMSOL Multiphysics® software to model a piezoelectric device as both a transmitter and receiver.

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Bridget Paulus December 19, 2018

When it comes to synchrotron light sources, brighter is better. By using bright beams in their accelerator, researchers at the Advanced Photon Source (APS) synchrotron facility can efficiently gather detailed data. In collaboration with APS engineers, Nicholas Goldring of RadiaSoft LLC creates and distributes simulation applications for designing vacuum chambers relevant to the APS. Below, find a video recording and summary of his keynote talk from the COMSOL Conference 2018 Boston.

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Chien Liu December 18, 2018

Traps are omnipresent in practical semiconductor devices. When modeling these devices, the Trap-Assisted Surface Recombination boundary condition adds the effects of charging and carrier capturing/releasing by surface or interface traps. Here, we examine a tutorial model of a metal-oxide-silicon capacitor (MOSCAP) to demonstrate how to use the feature in the Semiconductor Module, an add-on product to the COMSOL Multiphysics® software.

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Jenn Nguyen December 12, 2018

Lightning risk is an important consideration in various industries, including aircraft and wind turbines. But how do you study the behavior of a phenomenon that can cause extreme damage in microseconds? And how do you make sure your product can withstand a lightning strike? In his keynote talk at the COMSOL Conference 2018 Boston, Justin McKennon of NTS Lightning Technologies answers these questions, discussing how multiphysics simulation helps in the design and certification of lightning protection systems.

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Thomas Forrister December 5, 2018

Heart failure is a global health concern, affecting millions of people and keeping them from their everyday lives. But what if there was a device that could keep patients’ hearts pumping and even improve their quality of life? In his keynote presentation at the COMSOL Conference 2018 Boston, Freddy Hansen from Abbott Laboratories discussed a heart pump that could do just that. If you missed his talk, you can watch a recording of the video and read a summary below.

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Brianne Costa November 26, 2018

Signal Microwave develops high-frequency coaxial connectors in the RF and microwave industry, including end launch connectors, vertical launch connectors, and field replaceable connectors. At the COMSOL Conference 2018 Boston, Eric Gebhard of Signal Microwave discussed how using the COMSOL Multiphysics® software gives the company both a design and business advantage. Watch the keynote talk and get a quick summary below.

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Jose Gregorio November 19, 2018

Global modeling of plasmas is a powerful approach to study large chemistry sets. In these models, the reactions are represented by rate coefficients. In particular, the rate coefficients of electron impact collisions depend on the electron energy distribution function (EEDF), which is often non-Mawellian and can be computed from an approximation of the Boltzmann equation (BE). Here, we explain how to create a global model fully coupled with the BE in the two-term approximation using the COMSOL Multiphysics® software.

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Christopher Boucher November 5, 2018

Modern optical systems are often required to operate in harsh environments, including high altitudes, space, underwater, and in laser and nuclear facilities. Such optical systems are subjected to structural loads and extreme temperatures. The most accurate way to fully capture these environmental effects is through numerical simulation via a structural-thermal-optical performance (STOP) analysis. STOP analysis is the quintessential multiphysics problem. In this blog post, we show how to combine structural, thermal, and optical effects using the COMSOL Multiphysics® software.

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