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Heating Patterns Produced by 434 MHz Erbotherm UHF 69

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Bhudatt R. Paliwal, Chris Cardozo, Farhad Jafari, Jim Hanson, William Caldwell · 1980

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434 MHz microwaves create specific heating patterns in tissue, revealing how this frequency penetrates and deposits energy in biological systems.

Plain English Summary

Summary written for general audiences

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.

Original Figures

Diagrams extracted from the original research document.

Page 1 - Figure 1: Relative temperature change in a cylindrical phantom heated with a single applicator.
Page 2 - Relative temperature change in an abdominal phantom with three applicators.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Bhudatt R. Paliwal, Chris Cardozo, Farhad Jafari, Jim Hanson, William Caldwell (1980). Heating Patterns Produced by 434 MHz Erbotherm UHF 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},
  
  
}

Quick Questions About This Study

434 MHz microwaves are used in medical hyperthermia treatments to create controlled heating of tumors. This frequency can penetrate tissue effectively while generating therapeutic heat levels for cancer treatment applications.
434 MHz is lower than microwave ovens (2.45 GHz) but higher than most consumer wireless devices. It sits in the UHF band used by some industrial equipment and medical devices.
Heating patterns show how electromagnetic energy deposits in different tissues. Understanding these patterns helps assess potential thermal effects and guides safety standards for various frequencies and exposure scenarios.
The Erbotherm UHF 69-1 was a medical diathermy device that used 434 MHz microwaves to generate controlled heating for therapeutic purposes, particularly in cancer hyperthermia treatments.
434 MHz microwaves can penetrate several centimeters into tissue, making them useful for medical heating applications. Penetration depth varies with tissue type, water content, and other factors.