Simulation Advice - Katerina Galitskaya
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Katerina is a Senior Antenna Engineer at Radientum, an antenna design and consulting company in Tampere, Finland. She began her career in mm-wave antenna array design in 2014. As a Senior Engineer, she designs antennas for IoT, cellular, and mm-wave applications. Since 2022 the focus of her work is on sub-6GHz base station antenna design.  Katerina is 2022 Simulia Champion, technical blog writer and EM-simulation expert who posts examples here about various simulations so others can learn about various techniques.

Power Integrity Analysis of a Smartphone Motherboard

March 15, 2023

Power integrity simulation includes the following:

  • DC analysis, showing that power levels are in the limits
  • AC analysis, showing that net impedance behavior is reasonable on higher frequencies.

As the top picture shows, there are two high-impedance spots where resonances appear that are problematic. The resonances can be removed by adding extra decoupling capacitors in problematic areas. Their placement should be optimized in order to avoid creating additional resonances.

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