Abstract
This paper describes the use of Finite Difference Time Domain technique of numerical modeling for development and simulation symmetrical dipole with triangular shoulders placed in a cylindrical housing and a spiral antenna placed in a cylindrical housing for use in microwave radiometry. The new sensors have been tested and validated on different phantoms and biological tissues. Results suggest sufficient characteristics of broadband antennas for potential use in brain functional diagnostics.
Highlights
It is known that there is a connection between the violation of the functioning of organs and tissues of the body and changes in their local temperature
The great interest of scientists in the fields of medicine, biology and biophysics to microwave radiometry is due to the fact that it is a non-invasive method of measuring the internal temperatures of the human body based on the registration of their own microwave radiation
We formulated the criteria for optimum selection of antenna in concordance with technical requirements: high rates of measurement depth of the antenna because of power decrease accepted from skin layers of the patient; high level of noise shielding; miniature sizes of antenna; sufficient matching of antenna with biological tissues during the operation
Summary
It is known that there is a connection between the violation of the functioning of organs and tissues of the body and changes in their local temperature. The following main types of medical antennas for microwave radiometry are the most widely used: waveguide, printed, vibratory or frame antennas, as well as intracavitary antennas [3,4,5,6]. The printed antennas are lighter than waveguides antennas, cheaper, have a small height and has less impact on the temperature of the skin In recent years, these antennas have become widespread. Bolus allows you to align the antenna and increase the distance between the emitter and the biological object to the reactive fields arising in the emitter, do not fall into the biological object This allows you to increase the depth of measurement. Many printed antennas have significant longitudinal component of electric field Are the results of modeling and analysis of the main characteristics of two printed antennas: vibratory and spiral antennas
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