KR20200145664A - Resonator assembly for bio sensing and bio sensor using electromagnetic wave - Google Patents

Abstract

According to an embodiment of the present invention, a biosensor using electromagnetic waves comprises: a resonator assembly, a power supply unit, and a processor. The resonator assembly may include at least one feeding line which is disposed along the outer edge of a feeding area and can feed electric power to the feeding area, and a pattern wire which is disposed along a pattern in the feeding area and can receive electric power from the feeding line through capacitive coupling. The power supply unit may supply electric power to the resonator assembly. While a frequency of the electric power is swept, the processor may acquire a parameter which is biometric data corresponding to a concentration of a target analyte existing around the resonator assembly and is related to a resonance frequency of the resonator assembly.

Description

Resonator assembly for living body sensing and biosensor using electromagnetic waves {RESONATOR ASSEMBLY FOR BIO SENSING AND BIO SENSOR USING ELECTROMAGNETIC WAVE}

Hereinafter, a resonator assembly for sensing a living body and a biosensor using electromagnetic waves are provided.

Recently, modern people are increasingly suffering from so-called adult diseases such as diabetes, hyperlipidemia, and hemoglobin due to the westernization of their dietary habits. A simple method to determine the severity of these adult diseases is to measure the biological components in the blood. The measurement of biological components can determine the amount of various components in the blood, such as blood sugar, anemia, and blood clotting, so it is easy to determine whether the level of a specific component is in a normal or abnormal area without going to the hospital. There is an advantage that it is possible.

One of the easiest ways to measure biological components is to inject blood collected from a fingertip into a test strip and then quantitatively analyze the output signal using an electrochemical or photometric method.This method can display the amount of the corresponding component in a measuring instrument. It is suitable for ordinary people who do not have.

The biosensor may be used in combination with a smart device, and a technology that accurately determines whether data sensed by the biosensor is in error is required.

The biosensor according to an embodiment may sense the concentration of an analyte using electromagnetic waves.

The biosensor according to an embodiment may sense a concentration of an analyte using a meta surface.

The biosensor according to an embodiment may sense a concentration of an analyte using a relative permittivity.

A resonator assembly according to an embodiment includes at least one feeding line disposed along an outer periphery of a feeding area on one surface to feed electric power to the feeding area; And a pattern wire disposed along a pattern in the feeding area on the one side and capable of receiving electric power from the feeding line through brave coupling.

The resonant frequency of the resonator assembly may vary depending on the concentration of a target analyte existing around the resonator assembly.

The resonator assembly further includes a closed-loop wire disposed in the feeding area along the one surface, and the patterned wire is disposed in an inner region defined by the closed-loop wire, and the closed-loop wire It is possible to form a capacitive coupling with the feed line via via.

Parts of the closed loop conductor adjacent to a part of the power supply line may be spaced apart in parallel in the same shape as the part of the power supply line.

The closed loop conductor may have one of a polygonal shape and a circular shape.

The patterned conductor may include a first coupling portion disposed adjacent to the at least one feeding line on the one surface to form a capacitive coupling; A second coupling portion disposed adjacent to at least one of the feed line, the closed loop wire, and the additional pattern wire on the one side to form a capacitive coupling; And a connecting portion connecting the first coupling portion and the second coupling portion in a pattern on the one surface.

The connection portion may include a first part and a second part disposed opposite to each other based on a virtual line crossing the first and second coupling parts. .

The first part and the second part may be alternately disposed from the first coupling portion to the second coupling portion.

The first part and the second part may have a point symmetric shape on the one surface.

The connection portion may be arranged in a pattern of one of a sinusoidal shape, a sawtooth shape, a rectangular shape, and a triangular shape.

The resonator assembly may further include one or more additional pattern conductors disposed on the one surface so as to form a capacitive coupling with at least one of the pattern conductor and the feed line.

In the resonator assembly, the patterned lead and the at least one additional patterned lead may form a meta surface (MTS).

The pattern lead and the at least one additional pattern lead may be arranged in a pattern having the same shape.

The resonator assembly may further include a plurality of closed loop conductors individually surrounding each of the pattern conductor and the one or more additional pattern conductors on the one surface.

The one or more additional pattern conductors may be disposed to be spaced apart along an axis based on the pattern conductor.

The one surface may be a curved surface disposed along a side of a cylindrical support member.

The at least one feed line may include: a first feed line disposed on the one surface and including ports connected to other elements at both ends; And a second feed line disposed spaced apart from the first feed line on the one side and including ports connected to other elements at both ends, wherein the feed region is an area between the first feed line and the second feed line. I can.

The at least one feed line may be composed of a single feed line including a port for receiving power, and the feed region may be an area surrounded by the single feed line.

The biosensor using an electromagnetic wave according to an embodiment is disposed along the outer periphery of the feeding area to feed power to the feeding area, and is disposed along a pattern in the feeding area. A resonator assembly including a patterned lead wire capable of receiving power; A power supply for supplying power to the resonator assembly; And a processor that obtains a parameter associated with a resonant frequency of the resonator assembly as biometric data corresponding to a concentration of a target analyte existing around the resonator assembly while the frequency of the power is swept. have.

The biosensor according to an embodiment may sense an analyte non-invasively without pain of a user by using electromagnetic waves.

The biosensor according to an embodiment may accurately sense the concentration of the analyte with high sensitivity using the meta-surface.

In the biosensor according to an embodiment, since the relative permittivity corresponds to the concentration of the analyte, the concentration of the analyte can be determined with low computational complexity by calculating the resonance frequency.

1 shows a biosensing system using electromagnetic waves according to an embodiment.
2, 3A, and 3B illustrate a resonator assembly for a biosensor using electromagnetic waves according to an exemplary embodiment.
4 to 6 illustrate examples of patterned wires according to an embodiment.
7 to 12 show additional examples of a resonator assembly according to an embodiment.
13 illustrates an example of a 2-port biosensor using electromagnetic waves according to an embodiment.
14 shows an example of one port of a biosensor using electromagnetic waves according to an embodiment.
15 to 17 illustrate a relationship between a scattering parameter of a biosensor using an electromagnetic wave and a target analyte concentration according to an embodiment.
18 is a block diagram showing a schematic configuration of a biosensor using electromagnetic waves according to an embodiment.
19 shows an exemplary application of a biosensor using electromagnetic waves according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes to the embodiments are included in the scope of the rights.

The terms used in the examples are used for illustrative purposes only and should not be interpreted as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

Components included in one embodiment and components including common functions will be described using the same name in other embodiments. Unless otherwise stated, descriptions in one embodiment may be applied to other embodiments, and detailed descriptions in the overlapping range will be omitted.

1 shows a biosensing system using electromagnetic waves according to an embodiment.

The biosensing system 100 using electromagnetic waves according to an exemplary embodiment may include a biosensor 110 and an external device 120.

The biosensor 110 may be a sensor that senses a target analyte 193 using electromagnetic waves. The target analyte 193 is a material related to a living body, and may also be referred to as a biological material. For reference, in the present specification, the target analyte 193 is mainly described as blood sugar, but is not limited thereto.

The biosensor 110 may be inserted and/or implanted into the subcutaneous layer 192 under the skin 191. The biosensor 110 implanted under the skin may monitor the blood vessel 194 and the target analyte 193 present in the subcutaneous layer 192 using electromagnetic waves. For example, the biosensor 110 may measure a parameter associated with a resonance frequency of a resonator assembly to be described later. In the present specification, the parameter may represent a circuit network parameter used to analyze the biosensor. Hereinafter, for convenience of explanation, a scattering parameter is mainly described as an example, but is not limited thereto. As the parameter, for example, an admittance parameter, an impedance parameter, a hybrid parameter, and a transmission parameter may be used. The resonant frequency of the resonator assembly may vary depending on the concentration of the target analyte 193 present around the resonator assembly. For example, the resonant frequency may be expressed as capacitance and inductance of the resonator assembly as shown in Equation 1 below.

[Equation 1]

에 비례할 수 있다.In Equation 1 described above, f may be a resonant frequency of the resonator assembly, L may be an inductance of the resonator assembly, and C may be a capacitance of the resonator assembly. The capacitance C of the resonator assembly is a relative dielectric constant as shown in Equation 2 below.

Can be proportional to

[Equation 2]

The relative permittivity of the resonator assembly may be affected by the concentration of the target analyte 193 in the vicinity. Since the relative dielectric constant of the resonator assembly changes according to the change in the concentration of the target analyte 193, the resonant frequency of the resonator assembly also changes. Accordingly, the biosensing system 100 using electromagnetic waves according to an exemplary embodiment may determine the concentration of the target analyte 193 based on the resonance frequency of the resonator assembly of the biosensor 110.

For reference, the resonator assembly according to an embodiment may be designed for sensing the target analyte 193. For example, a resonator assembly having a structure to be described later in FIGS. 2 and 3A may have a relatively high Q-factor for a resonance frequency that changes according to a change in concentration of the target analyte 193. . In other words, a frequency response characteristic corresponding to a scattering parameter (hereinafter,'S parameter') of the resonator assembly within a range of a resonant frequency change according to a change in concentration of the target analyte 193 This relatively sharp curve can be shown. The resonator assembly may exhibit high sensitivity to a change in relative permittivity according to a change in concentration of the target analyte 193. Accordingly, the biosensor 110 according to an exemplary embodiment can accurately determine the resonant frequency of the resonator assembly, and further accurately estimate the concentration of the target analyte 193 corresponding to the resonant frequency.

For example, when the target analyte 193 is glucose, the resonator assembly may be designed to have specifications as shown in Table 1 below. However, this is purely exemplary and is not limited thereto.

parameter Minimum value Typical value Maximum value unit Target substance/
Target range Operating frequency band
(Operating frequency Band) 2.0 2.45 3.0 GHz Blood sugar Resonant peak (S11) (Typical) -30 dB Blood sugar Sensitivity to permittivity 4 MHz @ per100mg/㎗ MARD (Mean Absolute Relative Deviation) 8.5 %

The biosensor 110 using electromagnetic waves according to an embodiment may establish wireless communication with the external device 120. The biosensor 110 may acquire and collect biometric data corresponding to the concentration of the target analyte 193, and transmit the biometric data to the external device 120. The biometric data is data related to the concentration and/or amount of the target analyte 193, and may be, for example, a parameter related to the resonance frequency of the resonator assembly as described above. However, the present invention is not limited thereto, and the biometric data may include a resonant frequency corresponding to the concentration of an analyte, a scattering parameter for calculating the resonant frequency, and a frequency response characteristic corresponding to the scattering parameter. The biosensor 110 may transmit biometric data to the external device 120 through wireless communication. Furthermore, the biosensor 110 may wirelessly receive power from the external device 120. The biosensor 110 may monitor biometric data using wirelessly transmitted power. FIGS. 2, 3A, and 3B illustrate a resonator assembly for a biosensor using electromagnetic waves according to an exemplary embodiment.

2 shows an exemplary resonator assembly 210.

The resonator assembly 210 according to an embodiment may include a feeding line 211, a closed loop wire 213, and a pattern wire 212.

The power supply line 211 may represent a conducting wire that is disposed along the periphery of the power supply region on one surface 250 to feed power to the power supply region. On one surface 250, an area inside the feed line 211 may be referred to as a feed area. The resonator assembly 210 may include at least one feed line 211, and FIG. 2 shows an example in which the resonator assembly 210 includes two feed lines 211. When there are two feed lines 211, an area between the feed lines 211 may be a feed area. In FIG. 2, a two-port structure in which the two feed lines 211 have a first port 291 on an upper side and a second port 292 on a lower side is illustrated. However, it is not limited thereto, and an example of a 1-port structure will be described in FIG. 14 below.

The closed loop conductor 213 may be disposed in the power supply area along one surface 250. A pattern conductor 212 to be described later may be disposed in an inner region defined by the closed loop conductor 213. The closed loop conducting wire 213 may have one of a polygonal shape (eg, a rectangular shape) and a circular shape. In FIG. 2, an example of a square is described. The closed loop conducting wire 213 may form a capacitive coupling with the power supply line 211 and receive power from the power supply line 211. Parts 213a and 213b adjacent to a part of the power supply line 211 in the closed loop conductor 213 may be spaced apart in parallel in the same shape as a part of the power supply line 211 and may be disposed. The closed loop conductor 213 can provide impedance matching even within a miniaturized form factor. Therefore, when there is no closed loop conductor 213, the resonator assembly 210 having the closed loop conductor 213 is greater than the area required to achieve the target resonance frequency (for example, the resonance frequency corresponding to the target analyte). ) May represent the target resonance frequency with a smaller area.

The patterned conductor 212 may be disposed along a pattern in the power supply area on one surface 250 and may represent a conductor capable of receiving power from the power supply line 211 through a flexible coupling. The pattern conductor 212 may represent an inductance component according to a pattern. The pattern conductor 212 may form a capacitive coupling with the feed line 211. For example, the parts 212a and 212b of the pattern conductor 212 may form a capacitive coupling with the parts 211a and 211b adjacent to the power supply line 211, respectively. In addition, the patterned conductor 212 may form a capacitive coupling with the power supply line 211 via the closed loop conductor 213. For example, the parts 212a and 212b of the pattern conductor 212 may form a capacitive coupling with the adjacent parts 213a and 213b of the closed loop conductor 213, respectively. Various shapes of the pattern conductor 212 will be described in FIGS. 4 to 6 below.

For reference, the exemplary structure of the resonator assembly 210 illustrated in FIG. 2 may be designed to have a height h=26mm and a width w=14mm, but is not limited thereto. In addition, although the one surface 250 on which the resonator assembly 210 shown in FIG. 2 is disposed is illustrated in a plan view, it is not limited thereto. In FIG. 3A below, an example in which the resonator assembly 210 is disposed on a curved surface will be described.

3A and 3B illustrate an example in which one surface on which the resonator assembly is disposed is a curved surface and is disposed along the side of the cylinder.

The resonator assembly 310 shown in FIG. 3A has the same structure as the resonator assembly 210 shown in FIG. 2 and may be disposed along the curved surface 350. The surface current distribution 390 of the resonator assembly 310 is also shown. The unit of the surface current distribution 390 is expressed in A/m. In the resonator assembly 310 and the surface current distribution 390, the length axis of the resonator assembly 310 is shown as the y axis. Even in a cylindrical structure, the resonator assembly 310 may change the resonance frequency with high sensitivity to the concentration of the target analyte around it. The height h=26mm of the cylindrical resonator assembly 310 shown in FIG. 3A and the diameter d=3.96mm of the cylinder may have a form factor smaller than that of the planar resonator assembly 210 shown in FIG. 2.

FIG. 3B illustrates a change in a resonance frequency and a change in a Q-factor according to a spacing between each conductor in the resonator assembly 310 illustrated in FIG. 3A.

The resonator assembly 310 may have an impedance component (for example, a resistance component and a capacitance component) by a pattern and a closed loop conductor repeatedly appearing in the pattern conductors, and a resonant frequency may be determined according to the impedance component. In addition, when the resonator assembly 310 includes one or more closed loop conductors among a plurality of closed loop conductors, a multiple resonance phenomenon may occur.

The capacitance may increase or decrease due to the spacing between the patterned wire and the closed loop wire, and the resistance may increase or decrease depending on the thickness, width, height, and length of each conductive wire. The Q factor of the resonator assembly 310 may also be determined according to the capacitance and resistance. In the following, a change in capacitance according to a spacing between conductors and a change in a resonant frequency accordingly will be described.

According to an embodiment, the capacitance of the resonator assembly 310 may vary according to the spacing between the respective conductors. For example, in the resonator assembly 310 disposed along the curved surface 350, between a portion corresponding to the length direction (eg, y-axis direction) of the first feed line and a portion corresponding to the length direction of the second feed line The capacitance of the resonator assembly 310 may vary according to the spacing 303 (hereinafter,'the spacing between feed lines'). When the spacing 303 between the feed lines decreases, the capacitance of the resonator assembly 310 may increase. Accordingly, by reducing the spacing 303 between the feed lines according to Equation 1, the resonance frequency of the resonator assembly 310 may be lowered and the Q factor may be increased. In other words, the frequency response characteristic at the resonant frequency of the resonator assembly 310 may be sharp. Exemplarily, in FIG. 3B, a first resonance point 393a according to a frequency response characteristic when the distance 303 between feed lines is a first interval, and a second resonance point 393b according to a frequency response characteristic when the second interval , And a third resonance point 393c according to the frequency response characteristic in the case of the third interval. The third interval may be narrower than the second interval, and the second interval may be narrower than the first interval. The resonant frequency of the third resonant point 393c may be lower than the resonant frequency of the second resonant point 393b, and the resonant frequency of the second resonant point 393b may be lower than the resonant frequency of the first resonant point 393a. Furthermore, it is shown that the attenuation degree increases at each resonance point from the first resonance point 393a to the third resonance point 393c, and the Q factor increases by decreasing the spacing. Conversely, due to an increase in the spacing 303 between the feed lines, the resonant frequency of the resonator assembly 310 may increase and the Q factor may be lowered.

In FIG. 3B, changes in the resonance frequency and Q factor are mainly described according to the spacing between the feed lines, but the resonance frequency and the Q factor may also vary depending on the spacing between the other conductive lines. For example, the resonance frequency and the Q factor may also vary depending on the spacing 301 between the patterned conductors and the closed loop conductors, and the spacing 302 between the feeder and closed loop conductors. The resonator assembly 310 with reduced spacings 301, 302, 303 may exhibit a reduced resonant frequency and increased Q factor. Conversely, a resonator assembly 310 having increased spacings 301, 302, 303 may exhibit an increased resonant frequency and a reduced Q factor.

In addition, the resonant frequency change according to the spacing between conductors of the cylindrical resonator assembly 310 illustrated in FIG. 3A has been described, but the present invention is not limited thereto, and the cylindrical resonator assembly 310 and the resonator assembly 210 illustrated in FIG. Similarly, the resonant frequency may change according to the spacing between conductors.

4 to 6 illustrate examples of patterned wires according to an embodiment.

4 illustrates a patterned conductor 420 having a sine wave pattern.

The patterned lead wire 420 may include a first coupling portion 421, a second coupling portion 422, and a connecting portion 423.

The first coupling portion 421 and the second coupling portion 422 may represent portions of the pattern conductor 420 that form capacitive coupling with other conductors. For example, the first coupling portion 421 may be disposed adjacent to at least one feeding line on one surface to form a capacitive coupling. The second coupling portion 422 may be disposed adjacent to at least one of a power supply line, a closed loop conductor, and an additional pattern conductor on one surface to form a capacitive coupling. The additional pattern conductors are pattern conductors that are additionally arranged in addition to the basic pattern conductors, and will be described in FIGS. 9 to 11 below. The first coupling portion and the second coupling portion of the additional pattern conductor may form a capacitive coupling with another pattern conductor.

For example, the first coupling portion 421 may have the same shape as the shape of a part adjacent to the first coupling portion 421 in the feed line, and may be parallelly spaced apart from the adjacent part. For another example, the first coupling portion 421 has the same shape as the shape of a part adjacent to the first coupling portion 421 in the closed loop conductor when the pattern conductor is disposed in an area within the closed loop conductor, It can be spaced parallel from the part. The second coupling portion 422 has the same shape as the shape of a part adjacent to the second coupling portion 422 in a conductive line disposed adjacent among the feed line, closed loop conductor, and additional pattern conductor, and is spaced parallel from the adjacent part. Can be.

The connection portion 423 may connect the first coupling portion 421 and the second coupling portion 422 along a pattern on one surface. For example, the connection portion 423 is a first part disposed opposite to each other based on an imaginary line 490 crossing the first coupling portion 421 and the second coupling portion 422 (491) and a second part (492) may be included. The first part 491 and the second part 492 may be alternately disposed from the first coupling portion 421 to the second coupling portion 422. For example, the first part 491 and the second part 492 may have a point symmetric shape on one surface. The pattern conductor 420 illustrated in FIG. 4 is a sine wave shape, and the first part 491 and the second part 492 may include a curved part. The resonator assembly may have an inductance component according to the pattern of the connection portion 423. In this case, the connection portion 423 may be spaced apart from the feed line, the closed loop conductor, and other pattern conductors so as to prevent capacitive coupling with the power supply line, the closed loop conductor, and other pattern conductors.

The pattern of the connection portion 423 is not limited to that shown in FIG. 4, and the connection portion 423 has a sinusoidal shape, a sawtooth shape, a rectangular shape, and a triangular shape. shape) can be arranged according to the pattern of one shape.

5 illustrates patterned wires following a triangular pattern.

The first coupling portion 521, the second coupling portion 522, and the imaginary line 590 of the pattern conductor 520 are the same as those of FIG. 4, and thus descriptions thereof will be omitted. The pattern conductor 520 following the triangular pattern may include straight portions 591 and 592 intersecting the virtual line 590.

6 illustrates patterned wires following a rectangular pattern.

The first coupling portion 621, the second coupling portion 622, and the imaginary line 690 of the patterned wire 620 are the same as those of FIG. 4 and thus a description thereof will be omitted. The patterned wire 620 following the rectangular pattern may include straight portions 691 and 692 that are parallel to the virtual line 690 and disposed opposite to each other with respect to the virtual line 690.

7 to 12 show additional examples of a resonator assembly according to an embodiment.

7 illustrates an example of a resonator assembly without a closed loop conductor.

The resonator assembly 700 according to an exemplary embodiment may include a feed line and a pattern lead 720 without a closed loop lead. In FIG. 7, two feed lines 711 and 712 may define a feed area 719, and each of the two feed lines 711 and 712 may be disposed along at least a part of an outer periphery of the feed area 719. I can.

The coupling portions 721 and 722 of the patterned wire 720 may form a capacitive coupling with the feed line. For example, the first coupling portion 721 of the pattern conductor line 720 forms a capacitive coupling with the part 711a of the first feed line 711, and the second coupling portion 722 of the pattern conductor line 720 Silver may form a capacitive coupling with the part 712a of the second feed line 712. For reference, the example of the two ports separated by the first feed line 711 and the second feed line 712 has been described in FIG. 7, but is not limited thereto, and a single feed line instead of the first feed line 711 and the second feed line 712 It can also be implemented as

8 illustrates a resonator assembly comprising differently aligned patterned leads and one or more closed loop leads.

In the resonator assembly 800 according to an exemplary embodiment, the patterned conductor lines 820 may be variously aligned with respect to the feed line. For example, in FIGS. 1 to 7, the coupling portions of the pattern conductor 820 are disposed adjacent to the conductor wires between ports of the power supply line, but the coupling portions of the pattern conductor wire 820 shown in FIG. 8 are ports of the feed line. Can be placed adjacent to.

Also, the resonator assembly 800 may include one or more closed loop conductors. For example, a plurality of closed loop conductors may be disposed in a power supply area defined by the power supply lines 811 and 812. At least one of the plurality of closed loop conductors 831 and 832 may be disposed in an inner region defined by another closed loop conductor. For example, in FIG. 8, the first closed loop conductor 831 is disposed in the power supply area on one side, and the second closed loop conductor 832 is disposed in the inner area defined by the first closed loop conductor 831. I can. The pattern conductor 820 may be disposed in an inner region defined by the second closed loop conductor 832.

According to an embodiment, the resonator assembly may further include an additional patterned conductor. For example, one or more additional patterned wires may be disposed on one surface so as to form a capacitive coupling with at least one of the patterned wires and the feed wires.

9 illustrates an example in which the additional pattern conductor 922 is disposed so as to form a capacitive coupling with the feed line. The resonator assembly 900 may further include an additional patterned lead 922 in addition to the basic patterned lead 921. The resonator assembly 900 may include a closed loop conducting wire 930 disposed in a power supply area defined by the power supply lines 910. The basic pattern conductor 921 and the additional pattern conductor 922 may be disposed in an area defined by the closed loop conductor 930. The additional pattern conductor 922 and the basic pattern conductor 921 may be disposed in parallel with each other. For example, the additional pattern conductor 922 is, along the second axis 902 perpendicular to the first axis 901 crossing the first and second coupling portions of the basic pattern conductor 921 It may be arranged to be spaced apart from the pattern conductor 921. In addition, although only one additional pattern conductor 922 is illustrated in FIG. 9, it is not limited thereto, and one or more additional pattern conductors 922 may be disposed in the power supply area.

FIG. 10 illustrates an example of an additional patterned lead that is capacitively coupled with another patterned lead. For example, the second pattern conductor 1022 may be disposed to be spaced apart from the first pattern conductor 1021 along the second axis 1002 on one surface. The third pattern conductor 1023 may be disposed to be spaced apart from the first pattern conductor 1021 along the first axis 1001 on one surface. The fourth pattern conductor 1024 may be disposed along the first axis 1001 to be spaced apart from the second pattern conductor 1022. The first patterned lead 1021 and the third patterned lead 1023 may form a capacitive coupling either directly or via another additional patterned lead. The second patterned lead 1022 and the fourth patterned lead 1024 may form a capacitive coupling either directly or via another additional patterned lead. In FIG. 10, only four patterned wires are shown, but the present invention is not limited thereto. The n pattern conductors may be spaced apart from each other along the first axis 1001, and m pattern conductors may be spaced apart from each other along the second axis 1002. Accordingly, the resonator assembly 1000 may include nХm patterned conductors. Here, n and m may be integers of 1 or more.

In addition, in FIG. 10, only a single closed loop conductor 1030 is illustrated in a region defined by the power supply line 1010, but is not limited thereto. The resonator assembly 1000 may include one or a plurality of closed loop conductors in the power supply region, and each closed loop conductor may include one or a plurality of pattern conductors therein. 10 illustrates an example in which each of the plurality of closed loop conductors 1131, 1132, 1133, and 1134 includes a single pattern conductor.

FIG. 11 illustrates an exemplary structure including closed loop conductors 1131, 1132, 1133, and 1134 surrounding individual pattern conductors in the structure shown in FIG. 10. According to an embodiment, the resonator assembly 1100 may include a plurality of closed loop conductors 1131, 1132, 1133, and 1134 in a power supply area defined by the power supply line 1110. The plurality of closed loop conductors 1131, 1132, 1133, and 1134 may individually surround each of the pattern conductor 1121 and one or more additional pattern conductors 1122, 1123, 1124 on one surface.

In FIGS. 10 and 11, the pattern conductor and one or more additional pattern conductors may be arranged in the same pattern. In this case, the patterned lead wires and one or more additional patterned lead wires may form a meta surface (MTS).

In the above, the rectangular feeding area has been mainly described, but is not limited thereto.

12 illustrates a resonator assembly 1200 having a circular power supply region. The feed lines 1211 and 1212 may be disposed along the periphery of the circular feed area. The closed loop conductor 1230 may be formed in a circular shape according to the shape of the power supply area. The patterned conductor 1220 may be disposed in a circular power supply area. In this case, the coupling portions of the pattern conductor 1220 may be spaced apart in parallel with respect to the shape of the feed lines 1211 and 1212 and the closed loop conductor 1230, and may be formed in a shape that is a part of the circumference.

13 illustrates an example of a 2-port biosensor using electromagnetic waves according to an embodiment.

The resonator assembly 1310 according to an embodiment may be implemented with two ports. For example, the first feed line may be disposed on one surface and include ports connected to other elements at both ends. The second feed line is disposed to be spaced apart from the first feed line on one side, and may include ports connected to other elements at both ends. The feeding area may be an area between the first feeding line and the second feeding line.

The biosensor 1300 according to an embodiment may sense biometric data by using the resonator assembly 1310 implemented as a 2-port.

The measurement unit 1330 may measure a frequency response characteristic of the resonator assembly 1310 while applying a signal having a frequency to the resonator assembly 1310. For example, the measurement unit 1330 may include an oscillation circuit capable of adjusting an oscillation frequency and a signal detection circuit that detects voltage, current, power, and signal waveforms input/output to the resonator assembly 1310. However, the circuit configuration of the measurement unit 1330 is not limited as described above, and may vary according to design.

According to an embodiment, the measuring unit 1330 of the biosensor 1300 may sweep a frequency of power applied to the resonator assembly 1310. The measurement unit 1330 may sweep the frequency of power by changing the frequency within a predetermined target frequency range. The measurement unit 1330 may sequentially increase the power frequency from the lower limit to the upper limit of the target frequency range, or may sequentially decrease the power frequency from the upper limit to the lower limit of the target frequency range. When the analyte is blood sugar, the target frequency range is, for example, a range including 2.54 GHz, and may range from 2 GHz to 3.6 GHz. However, it is not limited thereto, and may be a range including 5.8GHz. The target frequency range may be set differently according to the type of analyte. However, this is exemplary, and the frequency sweep is not limited thereto, and various methods may be used.

The measurement unit 1330 of the biosensor 1300 includes information related to the frequency characteristics of the resonator assembly 1310 while the frequency of the power applied to the resonator assembly 1310 is swept (for example, frequency response characteristics and resonance Frequency, etc.) can be measured. For example, the measurement unit 1330 is a voltage sensor resonator assembly 1310. The voltage to be input to the first port of (V ₁ ^+, V ₁ ^-) and the second voltage input port (V ₂ ^+, V ₂ ^- ) Can be measured. The processor (not shown) of the biosensor 1300 may determine a scattering parameter based on voltages input/output through the first port and the second port. The processor (not shown) may collect the scattering parameters during the frequency sweep and determine the resonant frequency of the resonator assembly 1310 based on the collected scattering parameters. The scattering parameters include, for example, an S ₁₁ parameter representing the ratio of the input voltage and the output voltage at port 1, and the S ₂₁ parameter representing the ratio of the voltage input at port 1 and the voltage output at port 2. can do. Response characteristics corresponding to the scattering parameters will be described in FIGS. 15 and 16 below.

As described above, the relative permittivity associated with the resonator assembly 1310 in the subcutaneous layer 1392 may change according to the concentration of the analyte 1393 included in the blood of the blood vessel 1394. Accordingly, the biosensor 1300 may estimate the concentration of the analyte by determining the resonance frequency based on the scattering parameter. However, the present invention is not limited thereto, and the biosensor 1300 may collect only the scattering parameters as biometric data during the frequency sweep and transmit the collected scattering parameters to an external device. In this case, the external device may determine a resonant frequency based on the received scattering parameter and determine a concentration of an analyte corresponding to the resonant frequency.

14 shows an example of one port of a biosensor using electromagnetic waves according to an embodiment.

The resonator assembly 1410 according to an embodiment may be implemented as a single port. For example, at least one feed line in the resonator assembly 1410 may be configured as a single feed line including a port for receiving power. In this case, the power supply region may be a region surrounded by a single power supply line.

The processor, while the frequency of the power applied from the measurement unit 1430 to the resonator assembly 1410 is sweeping, the measurement unit 1430 is a voltage input/output to the first port for the resonator assembly 1410 implemented as a single port. Can be measured. The processor may calculate the S ₁₁ parameter based on the voltage input/output through one port. The processor may obtain a frequency response characteristic corresponding to the S ₁₁ parameter during the frequency sweep from the measurement unit 1430. The processor may determine the resonant frequency of the resonator assembly 1410 based on the frequency response characteristic. The biosensor 1400 may output at least one of a scattering parameter, a frequency response characteristic corresponding to the scattering parameter, a resonance frequency, and an analyte concentration corresponding to the resonance frequency as biometric data to an external device.

15 to 17 illustrate a relationship between a scattering parameter of a biosensor using an electromagnetic wave and a target analyte concentration according to an embodiment.

15 may show a frequency response characteristic curve 1500 of the S ₁₁ parameter for each relative permittivity. The vertical axis of the frequency response characteristic curve 1500 is a return loss in dB, and the horizontal axis is a frequency and the unit is GHz. In the frequency response characteristic curve 1500, a frequency at which a return loss is minimized may be a resonance frequency. For example, when the biosensor monitors the S ₁₁ parameter among the scattering parameters, the biosensor may search for a frequency in which the S ₁₁ parameter is the minimum within the target frequency range, and may determine the searched frequency as the resonance frequency.

16 may show a frequency response characteristic 1600 of the S ₂₁ parameter. In the frequency response characteristic 1600, the vertical axis is the magnitude of the scattering parameter, and the unit is dB, and the horizontal axis is the frequency and the unit is GHz. In the frequency response characteristic 1600, a frequency representing the maximum intensity may be a resonance frequency. For example, when the biosensor monitors the S ₂₁ parameter among the scattering parameters, the biosensor may search for a frequency in which the S ₂₁ parameter is the maximum within the target frequency range, and determine the searched frequency as the resonance frequency.

17 is a graph 1700 showing a change in resonant frequency according to a change in relative permittivity. In the graph 1700, the vertical axis is an S ₁₁ parameter and the unit is dB, and the horizontal axis is the frequency and the unit is GHz. The graph 1700 may include a curve of an S11 parameter according to a frequency change for each blood glucose value. It is shown that as the blood glucose value increases to 100 mg/dL, 150 mg/dL, 200 mg/dL, and 300 mg/dL, the resonance frequency at which the S ₁₁ parameter is the minimum value increases. The resonance frequency of the resonance assembly for each blood sugar concentration may be calculated and mapped in advance. The relationship between the blood sugar concentration and the resonance frequency may be stored in a mapping table (eg, a lookup table (LUT)). The biosensor may determine an analyte concentration corresponding to the resonance frequency from the lookup table.

18 is a block diagram showing a schematic configuration of a biosensor using electromagnetic waves according to an exemplary embodiment.

The biosensor 1800 using electromagnetic waves according to an embodiment may include a resonator assembly 1810, a processor 1820, a power supply unit 1830, a communication unit 1840, and a measurement unit 1850.

The resonator assembly 1810 includes at least one feeder line disposed along the outer periphery of the feeder area to feed power to the feeder area, and a patterned conductor disposed along a pattern in the feeder area and capable of receiving power from the feeder line through brazing coupling. can do. Since the resonator assembly 1810 has been described above with reference to FIGS. 2 to 12, a detailed description thereof will be omitted.

The processor 1820 is biometric data corresponding to the concentration of the target analyte existing around the resonator assembly 1810 while the frequency of the power supplied to the resonator assembly 1810 is swept, and the resonator assembly ( 1810), a parameter associated with the resonant frequency may be obtained. For example, the processor 1820 may collect scattering parameters for individual frequencies while the frequency of the signal supplied to the resonator assembly 1810 by the measurement unit 1850 is swept within a target frequency range. The processor 1820 may determine a resonant frequency based on the collected scattering parameters. The processor 1820 may determine the concentration of the analyte from the resonance frequency.

The power supply unit 1830 may supply power to the processor 1820, the communication unit 1840, and the measurement unit 1850. The power supply unit 1830 may wirelessly receive power from an external device and supply power to each element in the biosensor 1800. The power supply unit 1830 may include, for example, a battery, and may charge the battery with power received from an external device. The power supply unit 1830 may supply power to the resonator assembly 1810 or the like through the measurement unit 1850 by using electric power charged in the battery.

The communication unit 1840 may transmit biometric data to an external device and may receive information from the external device. For example, the communication unit 1840 may establish wireless communication with an external device. The biometric data may include at least one of a scattering parameter, a resonance frequency, and a concentration of an analyte.

The measurement unit 1850 may sweep a frequency of a signal supplied to the resonator assembly 1810 within a target frequency range, and measure information related to a parameter of the resonator assembly 1810 during the frequency sweep. For example, the measurement unit 1850 may measure electrical data of the resonator assembly 1810. The measurement unit 1850 may include a voltage sensor that measures a voltage across a port of the resonator assembly 1810. The measurement unit 1850 may sweep the frequency under the control of the processor 1820, for example, the signal at a frequency that is swept within the target frequency range at the sweep frequency interval determined by the processor 1820 resonator assembly ( 1810) can be provided. However, the present invention is not limited thereto, and the measurement unit 1850 may sweep the frequency according to its own oscillation circuit structure without the processor 1820.

19 shows an exemplary application of a biosensor using electromagnetic waves according to an embodiment.

The feed line 1911, the closed loop lead wire 1913, and the pattern lead wire 1912 according to an embodiment may be disposed on one surface. The resonator assembly 1910 disposed on one surface may be configured to surround a curved surface. For example, one surface on which the resonator assembly 1901 is disposed may be a curved surface disposed along a side of a cylindrical support member 1940.

The cross-section AA' of the cylindrical resonator assembly 1900 may be shown as a cross-sectional view 1990. Referring to cross-sectional view 1990, the resonator assembly 1910 may be supported by a cylindrical support member 1930. The outer surface of the resonator assembly 1910 may be packaged by a biocompatible material. The biocompatible material may be, for example, a PMMA (Poly Methyl Methacrylate) material, but is not limited thereto. The inner space of the cylindrical support member 1930 may accommodate a system on chip. The system-on-chip 1920 may represent a single chip in which the processor 1820, the power supply unit 1830, the communication unit 1840, and the measurement unit 1850 described above in FIG. 18 are implemented. However, this is illustrative and not limited thereto, and the system-on-chip 1920 is a chip implemented by integrating at least one of the processor 1820, the power supply 1830, the communication unit 1840, and the measurement unit 1850 May be.

As described above, although the embodiments have been described by the limited drawings, a person of ordinary skill in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order from the described method, and/or components such as a system, structure, device, circuit, etc. described are combined or combined in a form different from the described method, Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Therefore, other implementations, other embodiments and claims and equivalents fall within the scope of the following claims.

1800: biosensor
1810: resonator assembly
1820: processor
1830: power supply
1840: Ministry of Communications
1850: measuring unit

Claims (19)

In the resonator assembly (resonator assembly),
At least one feeding line disposed along the periphery of the feeding area on one side and capable of feeding electric power to the feeding area; And
A pattern wire that is disposed along a pattern in the feeding area on the one side and capable of receiving electric power from the feeding line through brave coupling
Resonator assembly comprising a. The method of claim 1,
The resonant frequency of the resonator assembly varies depending on the concentration of a target analyte existing around the resonator assembly,
Resonator assembly. The method of claim 1,
A closed-loop wire disposed in the feeding area along the one side
Including more,
The patterned wire,
Arranged in an inner region defined by the closed loop conductor, forming a capacitive coupling with the feed line via the closed loop conductor,
Resonator assembly. The method of claim 3,
Parts adjacent to a part of the feed line in the closed loop conductor are arranged to be spaced apart in parallel in the same shape as a part of the feed line,
Resonator assembly. The method of claim 3,
The closed loop conductor,
One of polygonal and circular shape,
Resonator assembly. The method of claim 1,
The patterned wire,
A first coupling portion disposed adjacent to the at least one feeding line on the one side to form a capacitive coupling;
A second coupling portion disposed adjacent to at least one of the feed line, the closed loop wire, and the additional pattern wire on the one side to form a capacitive coupling; And
A connecting portion connecting the first coupling portion and the second coupling portion in a pattern on the one side
Resonator assembly comprising a. The method of claim 6,
The connection part,
A first part and a second part disposed opposite to each other based on an imaginary line crossing the first and second joints
Resonator assembly comprising a. The method of claim 7,
The first part and the second part are alternately arranged from the first coupling portion to the second coupling portion,
Resonator assembly. The method of claim 6,
The first part and the second part have a point symmetric shape on the one surface,
Resonator assembly. The method of claim 6,
The connection part,
Arranged according to a pattern of one of a sinusoidal shape, a sawtooth shape, a rectangular shape, and a triangular shape,
Resonator assembly. The method of claim 1,
One or more additional pattern conductors disposed on the one surface to form a capacitive coupling with at least one of the pattern conductor and the feed line
Resonator assembly further comprising a. The method of claim 11,
The patterned wire and the one or more additional patterned wires form a meta surface (MTS),
Resonator assembly. The method of claim 11,
The pattern lead and the at least one additional pattern lead,
Arranged in a pattern of the same shape as each other,
Resonator assembly. The method of claim 11,
A plurality of closed loop conductors individually surrounding each of the pattern conductor and the one or more additional pattern conductors on the one side
Resonator assembly further comprising a. The method of claim 11,
The one or more additional pattern conductors,
It is arranged to be spaced apart along one axis based on the pattern conductor,
Resonator assembly. The method of claim 1,
One side above,
A curved surface disposed along the side of a cylindrical support member,
Resonator assembly. The method of claim 1,
The at least one feed line,
A first feed line disposed on the one surface and including ports connected to other elements at both ends; And
A second feed line disposed spaced apart from the first feed line on the one side and including ports connected to other elements at both ends
Including,
The feeding area,
A region between the first feed line and the second feed line,
Resonator assembly. The method of claim 1,
The at least one feed line,
It is composed of a single feed line including a port that receives power,
The feeding area,
An area surrounded by the single feed line,
Resonator assembly. In the biosensor using electromagnetic waves,
A resonator assembly comprising at least one feeder line disposed along the outer periphery of the feeder area to feed power to the feeder area, and a patterned lead line disposed along a pattern in the feeder area and capable of receiving power from the feeder line through a capacitive coupling ;
A power supply for supplying power to the resonator assembly; And
While the frequency of the power is swept, as biometric data corresponding to the concentration of the target analyte existing around the resonator assembly, a processor that obtains a parameter related to the resonance frequency of the resonator assembly
Biosensor using an electromagnetic wave comprising a.

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