Computation of the Electromagnetic Fields and Induced Temperatures Within a Model of the Microwave-Irradiated Human Eye

Allen Taflove; Morris E. Brodwin

doi:10.1109/TMTT.1975.1128708

Computation of the Electromagnetic Fields and Induced Temperatures Within a Model of the Microwave-Irradiated Human Eye

Allen Taflove, Morris E. Brodwin

Research output: Contribution to journal › Article › peer-review

194 Scopus citations

Abstract

The electromagnetic fields within a detailed model of the human eye and its surrounding bony orbit are calculated for two different frequencies of planewave irradiation: 750 MHz and 1.5 GHz. The computation is performed with a finite-difference algorithm for the time-dependent Maxwell's equations, carried out to the sinusoidal steady state. The heating potential, derived from the square of the electric field, is used to calculate the temperatures induced within the eyeball of the model. This computation is performed with the implicit alternating-direction (IAD) algorithm for the heat conduction equation. Using an order-of-magnitude estimate of the heat-sinking capacity of the retinal blood supply, it is determined that a hot spot exceeding 40.4°C occurs at the center of the model eyeball at an incident power level of 100 mW/cm2 at 1.5 GHz.

Original language	English (US)
Pages (from-to)	888-896
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	23
Issue number	11
DOIs	https://doi.org/10.1109/TMTT.1975.1128708
State	Published - Nov 1975
Externally published	Yes

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.1975.1128708

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title = "Computation of the Electromagnetic Fields and Induced Temperatures Within a Model of the Microwave-Irradiated Human Eye",

abstract = "The electromagnetic fields within a detailed model of the human eye and its surrounding bony orbit are calculated for two different frequencies of planewave irradiation: 750 MHz and 1.5 GHz. The computation is performed with a finite-difference algorithm for the time-dependent Maxwell's equations, carried out to the sinusoidal steady state. The heating potential, derived from the square of the electric field, is used to calculate the temperatures induced within the eyeball of the model. This computation is performed with the implicit alternating-direction (IAD) algorithm for the heat conduction equation. Using an order-of-magnitude estimate of the heat-sinking capacity of the retinal blood supply, it is determined that a hot spot exceeding 40.4°C occurs at the center of the model eyeball at an incident power level of 100 mW/cm2 at 1.5 GHz.",

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AB - The electromagnetic fields within a detailed model of the human eye and its surrounding bony orbit are calculated for two different frequencies of planewave irradiation: 750 MHz and 1.5 GHz. The computation is performed with a finite-difference algorithm for the time-dependent Maxwell's equations, carried out to the sinusoidal steady state. The heating potential, derived from the square of the electric field, is used to calculate the temperatures induced within the eyeball of the model. This computation is performed with the implicit alternating-direction (IAD) algorithm for the heat conduction equation. Using an order-of-magnitude estimate of the heat-sinking capacity of the retinal blood supply, it is determined that a hot spot exceeding 40.4°C occurs at the center of the model eyeball at an incident power level of 100 mW/cm2 at 1.5 GHz.

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Computation of the Electromagnetic Fields and Induced Temperatures Within a Model of the Microwave-Irradiated Human Eye

Abstract

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