Heating Patterns Produced by 434 MHz Erbotherm UHF 69
Bhudatt R. Paliwal, Chris Cardozo, Farhad Jafari, Jim Hanson, William Caldwell · 1980
434 MHz microwaves create specific heating patterns in tissue, revealing how this frequency penetrates and deposits energy in biological systems.
Plain English Summary
This 1980 technical study examined heating patterns produced by a 434 MHz medical microwave device called the Erbotherm UHF 69-1. Researchers mapped how this frequency creates heat distribution in tissues, which was important for medical hyperthermia treatments that use controlled heating to treat cancer.
Why This Matters
This research represents early investigation into how 434 MHz microwaves create heating patterns in biological tissue. While conducted for medical applications, the science demonstrates fundamental principles about how this frequency interacts with our bodies. The reality is that 434 MHz sits within the UHF band used today by various wireless technologies, including some industrial and scientific devices. What this means for you is understanding that microwave frequencies don't just heat uniformly - they create specific patterns of energy absorption that depend on tissue type, depth, and frequency. The heating effects studied here occur at much higher power levels than typical consumer devices, but the underlying physics of how 434 MHz energy penetrates and heats tissue remains relevant to modern EMF exposure assessment.
Figures from the Original Paper
Diagrams extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study. Duration: 10 minutes for single applicator, 15 minutes for two applicators
Study Details
To characterize the fields produced by the Erbe "Euro 69" 434 diathermy system and map temperature distributions in phantoms produced by a 434 MHz applicator-generator system using single and multiple applicators in several geometrical configurations.
Phantoms were made from styrofoam with 2-cm wall thickness and filled with tissue-equivalent materia...
Isotherms showing relative rise of temperature from phantom's ambient temperature were produced. For...
The heating patterns may be modified significantly by selectively arranging the applicator-medium configuration. The uniformity of heating can also be improved. The 434 MHz system is capable of heating at depths of 10 cm. However, it is difficult to draw conclusions regarding thermal distributions in tumors in humans. Accurate monitoring of tissue temperatures during treatment is necessary for safe administration of microwave heating using Erbother 69.
Show BibTeX
@article{heating_patterns_produced_by_434_mhz_erbotherm_uhf_69_g5254,
author = {Bhudatt R. Paliwal and Chris Cardozo and Farhad Jafari and Jim Hanson and William Caldwell},
title = {Heating Patterns Produced by 434 MHz Erbotherm UHF 69},
year = {1980},
}