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Title: Electric Field and Dispersion Characteristic Calculations of Glass Tube Waveguides Filled with Biological Substances
Authors: Plonis, Darius
Bučinskas, Juozas
Pomarnacki, Raimondas
Miniotas, Darius
Paulikas, Šarūnas
Katkevičius, Andrius
Martavičius, Romanas
Nickelson, Liudmila
Keywords: microwaves
blood plasma
red blood cells
propagation constant
electric fields
waveguides
Issue Date: 2019
Publisher: MDPI
Citation: Plonis, D.; Bučinskas, J.; Pomarnacki, R.; Miniotas, D.; Paulikas, Š.; Katkevičius, A.; Martavičius, R.; Nickelson, L. Electric Field and Dispersion Characteristic Calculations of Glass Tube Waveguides Filled with Biological Substances. Electronics 2019, 8, 301.
Series/Report no.: 8;3
Abstract: This study presents calculation of dispersion characteristics in the frequency range 1–100 GHz as well as electric field distributions in an open cylindrical waveguide with a central channel. The waveguide is made of glass material. The channel can be either empty or filled with blood plasma or blood cells. We investigated two kinds of electromagnetic (ЕМ) waves, the “tube” and “core” modes, each having a different structure of their electric fields. In the current study, the analysis focused on the fundamental and the first higher hybrid magnetic and electric “tube” modes. The fundamental “tube” mode that propagates in the waveguide filled with blood plasma is characterized by a very small loss at frequencies above 65 GHz. Meanwhile, the first higher mode suffers from strong attenuation in the same frequency range. This calls for finding ways to improve the waveguide’s broad-bandwidth. Our approach involves determining the dependence of this parameter on the inner radius of the waveguide. Extremes of the waveguide’s broad-bandwidth are observed at certain values of its inner radius. When the waveguide is filled with blood plasma or blood cells, the electric fields of the magnetic “tube” mode concentrate around the channel, and the electric field intensity decreases with the propagation of this mode along the waveguide, i.e., with increase of coordinate z. If the channel is filled with blood cells, the electric field of the hybrid magnetic “core” mode is concentrated in the center of the waveguide. This mode is characterized by a large attenuation h”, which reaches 500 m−1 at 30 GHz
Description: This article belongs to the Section Bioelectronics
URI: http://dspace.vgtu.lt/handle/1/3911
ISSN: 2079-9292
Appears in Collections:Moksliniai straipsniai / Research articles

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