KR-102961613-B1 - ELECTROMAGNETIC WAVE IRRADIATION DEVICE USING COAXIAL LINE

KR102961613B1KR 102961613 B1KR102961613 B1KR 102961613B1KR-102961613-B1

Abstract

The present invention relates to an electromagnetic wave irradiation device capable of effectively forming a Transverse Electromagnetic (TEM) mode within a chamber by expanding the internal conductor diameter and dielectric diameter of a coaxial line for mode matching, thereby securing a uniform Specific Absorption Rate (SAR). The above electromagnetic wave irradiation device may include an input coaxial line connected to an input source, an output coaxial line connected to a dummy load, a first mode matching coaxial line connected to the input coaxial line to resolve mode mismatch within the electromagnetic wave irradiation device, a second mode matching coaxial line connected to the output coaxial line to resolve mode mismatch within the electromagnetic wave irradiation device, and a coaxial line chamber disposed between the first mode matching coaxial line and the second mode matching coaxial line to accommodate the irradiation target.

Inventors

박정훈
이문규
윤선화

Assignees

서울시립대학교 산학협력단

Dates

Publication Date: 20260508
Application Date: 20250604

Claims (10)

In an electromagnetic wave irradiation device that irradiates electromagnetic waves onto a subject, Input coaxial line connected to the input source; Output coaxial line connected to a dummy load; A first mode matching coaxial line connected to the above input coaxial line to resolve mode mismatch within the electromagnetic wave irradiation device; A second mode matching coaxial line connected to the output coaxial line and resolving mode mismatch within the electromagnetic wave irradiation device; and A coaxial line chamber disposed between the first mode matching coaxial line and the second mode matching coaxial line and accommodating the investigation target, wherein The above input coaxial line and the above output coaxial line include a standard coaxial line including an N-type connector. Electromagnetic wave irradiation device.
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In an electromagnetic wave irradiation device that irradiates electromagnetic waves onto a subject, Input coaxial line connected to the input source; Output coaxial line connected to a dummy load; A first mode matching coaxial line connected to the above input coaxial line to resolve mode mismatch within the electromagnetic wave irradiation device; A second mode matching coaxial line connected to the output coaxial line and resolving mode mismatch within the electromagnetic wave irradiation device; and A coaxial line chamber disposed between the first mode matching coaxial line and the second mode matching coaxial line and accommodating the investigation target, wherein The above input coaxial line, the above output coaxial line, the above first mode matching coaxial line, the above second mode matching coaxial line and the above coaxial line chamber are, including a predefined internal conductor and a predefined dielectric Electromagnetic wave irradiation device.
In Paragraph 3, The above input coaxial line, the above output coaxial line, the above first mode matching coaxial line, and the above second mode matching coaxial line include a predefined first dielectric, and The above coaxial track chamber includes a second dielectric different from the first dielectric. Electromagnetic wave irradiation device.
In Paragraph 4, The first dielectric material above comprises PTFE (Polytetrafluoroethylene), and The above second dielectric comprises air. Electromagnetic wave irradiation device.
In Paragraph 3, The diameter of the inner conductor and the diameter of the dielectric included in the first mode matching coaxial line and the second mode matching coaxial line are, having a value larger than the diameter of the inner conductor and the diameter of the dielectric included in the input coaxial line and the output coaxial line. Electromagnetic wave irradiation device.
In Article 6, The diameter of the dielectric included in the first mode matching coaxial line and the second mode matching coaxial line has a value smaller than or equal to the diameter of the dielectric included in the coaxial line chamber. Electromagnetic wave irradiation device.
In an electromagnetic wave irradiation device that irradiates electromagnetic waves onto a subject, Input coaxial line connected to the input source; Output coaxial line connected to a dummy load; A first mode matching coaxial line connected to the above input coaxial line to resolve mode mismatch within the electromagnetic wave irradiation device; A second mode matching coaxial line connected to the output coaxial line and resolving mode mismatch within the electromagnetic wave irradiation device; and A coaxial line chamber disposed between the first mode matching coaxial line and the second mode matching coaxial line and accommodating the investigation target, wherein The shape of the above coaxial track chamber is, including predefined polygonal shapes Electromagnetic wave irradiation device.
In Article 8, In the above-mentioned coaxial track chamber, a plurality of cavities are inserted, each accommodating a plurality of irradiation targets. Electromagnetic wave irradiation device.
In Article 8, The above-mentioned subjects of investigation include at least one of experimental animals, cell culture media, and tissue samples. Electromagnetic wave irradiation device.

Description

Electromagnetic wave irradiation device using a coaxial line The present invention relates to an electromagnetic wave irradiation device using a coaxial line. Specifically, the present invention relates to an electromagnetic wave irradiation device capable of effectively forming a Transverse Electromagnetic (TEM) mode within a chamber by expanding the internal conductor diameter and dielectric diameter of a coaxial line for mode matching, thereby securing a uniform Specific Absorption Rate (SAR). Electromagnetic irradiation devices are used to study the biological effects at specific frequencies by irradiating subjects, such as laboratory animals or cell culture media, with electromagnetic waves. As environments exposed to electromagnetic waves increase due to advancements in communication technology, the importance of such research is growing in various fields, including human safety assessments and medical applications. Conventional electromagnetic irradiation devices have utilized dipole antennas, loop antennas, radial cavities, radial waveguides, TEM cells, and wire patch cells (WPCs). However, these existing devices have limitations, such as having a narrow impedance band, problems where the experimenter is exposed to electromagnetic waves due to leakage radiation when high-power signals are applied, or problems with the generation of radiated signals. In particular, electromagnetic absorbers used in the 433 MHz band have issues such as large volume or high cost. A coaxial line is a basic structure used for the transmission of electromagnetic waves, consisting of a dielectric material filled between an inner conductor and an outer conductor. Coaxial lines operate in Transverse Electromagnetic (TEM) mode, which has the advantage of minimizing reflection losses and preventing radiation. However, in conventional coaxial line-based irradiation devices, standard coaxial line levels (e.g., N-type connectors) were used, resulting in a large difference between the length of the chamber and the dielectric diameter of the coaxial line, which caused mode mismatch between the coaxial line chamber and the feed coaxial line. Consequently, there were limitations in that the TEM mode could not be properly formed within the chamber and the electric field could not be effectively transmitted to the irradiation target. Therefore, an improved structure and method are required to enhance the performance of the electromagnetic wave irradiation device. FIG. 1 is a perspective view of an electromagnetic wave irradiation device according to some embodiments of the present invention. FIG. 2 is a plan view of an electromagnetic wave irradiation device according to some embodiments of the present invention. FIG. 3 is a cross-sectional view of an electromagnetic wave irradiation device according to some embodiments of the present invention. FIG. 4 is a drawing for explaining the internal configuration of an electromagnetic wave irradiation device according to some embodiments of the present invention. FIGS. 5 to 9 are drawings for explaining an electromagnetic wave irradiation device having a cavity inserted according to some embodiments of the present invention. FIGS. 10 to 14 illustrate simulation results for an electromagnetic wave irradiation device according to some embodiments of the present invention. FIGS. 15 to 17 are drawings for explaining the case where an irradiation target contained in an electromagnetic wave irradiation device according to some embodiments of the present invention is a Petri dish containing a cell culture medium. Terms and words used in this specification and claims shall not be interpreted as being limited to their general or dictionary meanings. In accordance with the principle that an inventor may define the concept of a term or word to best describe their invention, they shall be interpreted in a meaning and concept consistent with the technical spirit of the invention. Furthermore, since the embodiments described in this specification and the configurations illustrated in the drawings are merely one embodiment of the invention and do not represent the entire technical spirit of the invention, it should be understood that various equivalents, modifications, and applicable examples capable of replacing them may exist at the time of filing this application. The terms first, second, A, B, etc., as used in this specification and claims may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. The terms used in this specification and claims are u