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.

UHF RFID Wearable Antenna Simulation

January 16, 2023

UHF RFID (radio-frequency identification) technology has become increasingly popular in recent years for its ability to quickly and accurately track and identify objects, animals, and even people. One application of UHF RFID technology is the use of wristbands as an antenna to track individuals in crowded spaces such as concerts, festivals, or hospitals. However, when an RFID antenna is placed on the wrist, it must contend with the absorption of radiation by the human skin. The skin is a natural barrier that absorbs a portion of the RF energy that is transmitted by the antenna, resulting in a reduction of the signal strength that is received by the RFID reader. To mitigate this effect, UHF RFID antennas are designed with specific characteristics that allow them to effectively transmit and receive signals despite the presence of the human body. For example, an antenna placed on the wrist may have a modified radiation pattern that is more focused in the direction of the RFID reader, rather than being omnidirectional as it would be in free space.

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