KR20250091620A - Object exploration radar system and object exploration method using the same - Google Patents

Abstract

The present invention relates to an object exploration radar system and an object exploration method using the same, wherein the system receives electric and magnetic fields induced from an object to be explored by electromagnetic waves emitted from a transmitting antenna by an electric field receiving antenna in the form of a monopole antenna and a magnetic field receiving antenna in the form of a loop antenna, and analyzes the physical properties of the object to be explored by using the electric field information and the magnetic field information, thereby enabling the accurate location and characteristics of the object to be explored to be identified.

Description

Object exploration radar system and object exploration method using the same {Object exploration radar system and object exploration method using the same}

The present invention relates to an object exploration radar system and an object exploration method using the same, and more specifically, to an object exploration radar system capable of identifying the location and characteristics of an object to be explored by receiving a magnetically induced electromagnetic wave signal from the object to be explored and analyzing its physical properties, and an object exploration method using the same.

Electromagnetic radar used for underground property exploration is a technology that recognizes an object by transmitting high-power pulsed electromagnetic waves and receiving electromagnetic waves reflected by the object. It is used in various fields such as the military, space, aircraft control, remote sensing, meteorology, and ships. Among them, ground penetrating radar (GPR) identifies objects buried underground by generating one frequency of electromagnetic waves in the range of approximately 400 MHz to 5 GHz into a pulse with a width of picoseconds or nanoseconds and outputting it, or dividing the entire frequency range into certain frequency ranges and sequentially outputting them in the form of pulses or continuous waves.

However, general GPR technology has the problem that the measurement results vary depending on the condition of the underground soil, region, climate, weather, etc., and although it is possible to identify the existence of underground objects, it is difficult to specifically identify them. In addition, due to the nature of electromagnetic waves, energy is reflected and absorbed by the soil, so there is a problem that the depth of underground penetration is limited.

And, by measuring the time of flight of the electromagnetic pulse, that is, the time it takes for it to bounce back after hitting an underground object, the distance to the underground object is measured, but there is a problem that a high-band frequency is required for high resolution, and this reduces the depth of underground exploration. There is also a problem that it is difficult to use except in flat areas because the transmitting and receiving antennas must be placed close to the ground surface in order to accurately measure the time of flight of the electromagnetic pulse.

Korean Patent Publication No. 10-1551824 (“Buried Object Detection Radar and Detection Method”, Registration Date 2015.09.03.)

The present invention has been made to solve the above-mentioned problems, and the purpose of the object exploration radar system according to the present invention and the object exploration method using the same is to provide an object exploration radar system capable of identifying the location and characteristics of an exploration target object by receiving and analyzing electric and magnetic fields induced from the exploration target object by electromagnetic waves emitted from a transmitting antenna, and an object exploration method using the same.

In order to solve the above-described problem, the object exploration radar system of the present invention comprises: a transmitting antenna that emits electromagnetic waves, an electric-field receiving antenna that receives an electric field, a magnetic-field receiving antenna that receives a magnetic field, a body part which fixes the transmitting antenna, the electric-field receiving antenna and the magnetic-field receiving antenna at positions each spaced apart from the ground surface in a vertical direction by a predetermined distance H, and has the transmitting antenna and the magnetic-field receiving antenna at positions where the distance between the center of the transmitting antenna and the center of the magnetic-field receiving antenna becomes a predetermined distance W, and a signal processing unit which controls the transmitting antenna and the body part and receives electric field information and magnetic field information from the electric-field receiving antenna and the magnetic-field receiving antenna, respectively, wherein the signal processing unit is characterized in that it calculates the properties of the object of exploration based on the H, W, the electric-field information and the magnetic-field information.

In addition, the body part is characterized in that the transmitting antenna and the magnetic field receiving antenna are provided at positions where the first virtual line connecting the left and right inner sides based on the center of the transmitting antenna and the second virtual line connecting the left and right inner sides based on the center of the magnetic field receiving antenna are horizontal to the ground surface.

In addition, the transmitting antenna is characterized by continuously emitting one electromagnetic wave having a frequency within a first predetermined range, or simultaneously and continuously emitting two or more electromagnetic waves having different frequencies within the first predetermined range.

In addition, the transmitting antenna and the magnetic field receiving antenna are characterized in that they are loop antennas having a predetermined shape.

In addition, the electric field receiving antenna is characterized by being a monopole antenna.

In addition, the signal processing unit is characterized by calculating the properties of the target object within a distance that is half the distance of W.

In addition, the signal processing unit is characterized in that it calculates the properties of the target object of exploration within a distance satisfying the stored formula a when the H is a preset second predetermined range.

In order to solve the above-described problem, the present invention provides an object exploration method using an object exploration radar system for calculating a physical property of an exploration target object, the object exploration method comprising: a position adjustment step in which a signal processing unit fixes a transmitting antenna, an electric field receiving antenna, and a magnetic field receiving antenna at positions each spaced apart from a ground surface in a vertical direction by a predetermined distance H, and controls a body unit so that the transmitting antenna and the magnetic field receiving antenna are provided at positions where a distance between the center of the transmitting antenna and the center of the magnetic field receiving antenna becomes a predetermined distance W; a signal transmission and reception step in which the signal processing unit controls the transmitting antenna to emit electromagnetic waves and receives electric field information and magnetic field information from the electric field receiving antenna and the magnetic field receiving antenna, respectively; and a physical property calculation step in which the signal processing unit calculates a physical property of the exploration target object based on the H, W, the electric field information, and the magnetic field information.

In addition, the position adjustment step is characterized in that the transmitting antenna and the magnetic field receiving antenna are provided at positions where a first virtual line connecting the left and right inner sides based on the center of the transmitting antenna and a second virtual line connecting the left and right inner sides based on the center of the magnetic field receiving antenna are horizontal to the ground surface.

In addition, the signal transmission/reception step is characterized by controlling the transmitting antenna to continuously emit one electromagnetic wave having a frequency within a preset first predetermined range, or to simultaneously and continuously emit two or more electromagnetic waves having different frequencies within the first predetermined range.

In addition, the transmitting antenna and the magnetic field receiving antenna are characterized in that they are loop antennas having a predetermined shape.

In addition, the electric field receiving antenna is characterized by being a monopole antenna.

In addition, the above-mentioned property calculation step is characterized by calculating the property for the exploration target object within a distance that is half the above-mentioned W.

In addition, the property calculation step is characterized by calculating the property for the exploration target object within a distance satisfying the stored formula a when the H is a preset second predetermined range.

According to the object exploration radar system of the present invention as described above and the object exploration method using the same, there is an advantage in that objects can be explored at depths of up to 100 m underground regardless of terrain by adjusting the heights of the transmitting antenna, the electric field receiving antenna, and the magnetic field receiving antenna, and the distance between the transmitting antenna and the magnetic field receiving antenna.

In addition, it has the advantage of being able to identify the exact location and characteristics of the target object.

FIG. 1 is a configuration diagram illustrating an object exploration radar system according to one embodiment of the present invention.
FIG. 2 is a layout diagram showing the heights of a transmitting antenna, an electric field receiving antenna, and a magnetic field receiving antenna of an object exploration radar system according to one embodiment of the present invention, and the distance between the transmitting antenna and the magnetic field receiving antenna.
FIG. 3 is a schematic diagram showing the shapes of a transmitting antenna and a magnetic field receiving antenna of an object exploration radar system according to one embodiment of the present invention.
FIG. 4 is a flowchart illustrating an object exploration method using an object exploration radar system according to one embodiment of the present invention.

The purpose, features, and advantages of the present invention described above will become more apparent through the following examples with reference to the accompanying drawings. The specific structural and functional descriptions below are merely exemplified for the purpose of explaining embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in this specification or application. Since the embodiments according to the concept of the present invention may have various modifications and may have various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention. The terminology used herein is merely used to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes plural expression unless the context clearly indicates otherwise. In this specification, the terms “include” or “have”, etc. are intended to indicate the presence of a described feature, number, step, operation, component, part, or combination thereof, but should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and shall not be interpreted in an ideal or overly formal sense unless explicitly defined herein. Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings. The same reference numerals presented in each drawing represent the same members.

FIG. 1 is a configuration diagram showing an object exploration radar system according to an embodiment of the present invention, FIG. 2 is a layout diagram showing the heights of a transmitting antenna, an electric field receiving antenna, and a magnetic field receiving antenna of the object exploration radar system according to an embodiment of the present invention, and the distance between the transmitting antenna and the magnetic field receiving antenna, and FIG. 3 is a schematic diagram showing the shapes of the transmitting antenna and the magnetic field receiving antenna of the object exploration radar system according to an embodiment of the present invention. The object exploration radar system according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

An object exploration radar system according to one embodiment of the present invention may include a transmitting antenna (100), an electric field receiving antenna (200), a magnetic field receiving antenna (300), a body (400), and a signal processing unit (500), as illustrated in FIG. 1.

Let's take a closer look at each component:

The above transmitting antenna (100) can emit electromagnetic waves to the outside.

Specifically, the transmitting antenna (100) can continuously emit one electromagnetic wave having a frequency within a preset first predetermined range, or can simultaneously and continuously emit two or more electromagnetic waves having different frequencies within the first predetermined range. At this time, the first predetermined range is 0.3 MHz or more and 30 MHz or less, but is not necessarily limited thereto. However, as a result of conducting various experiments using an object exploration radar system according to an embodiment of the present invention, it was confirmed that when the frequency range of the electromagnetic wave emitted by the transmitting antenna (100) is 0.3 MHz or more and 30 MHz or less, the shape of the exploration target object (10) can be represented with high resolution, and therefore, the present invention is limited thereto.

The above electric field receiving antenna (200) and magnetic field receiving antenna (300) can receive electric and magnetic fields from the outside.

Let me explain in detail about the above transmitting antenna (100), electric field receiving antenna (200) and magnetic field receiving antenna (300).

When the transmitting antenna (100) emits electromagnetic waves toward the ground surface, the electromagnetic waves are absorbed by the exploration target object (10) within the exploration depth (D) based on the ground surface. Thereafter, the magnetic component of the electromagnetic waves generates an eddy current in the exploration target object (10), and the exploration target object (10) is magnetically induced by the eddy current to generate an electric field and a magnetic field. Thereafter, the electric field receiving antenna (200) and the magnetic field receiving antenna (300) receive the electric field and the magnetic field of the exploration target object (10). However, the electromagnetic wave emission direction of the transmitting antenna (100) and the positions of the electric field and magnetic field receiving targets of the electric field receiving antenna (200) and the magnetic field receiving antenna (300) are not limited to the lower part of the ground surface, and electromagnetic waves may be emitted toward other external targets or electric and magnetic fields may be received from other external targets.

Additionally, the transmitting antenna (100) and the magnetic field receiving antenna (300) may be loop antennas having a predetermined shape.

In detail, the transmitting antenna (100) and the magnetic field receiving antenna (300) may have the shapes of a circular loop antenna (100-1, 300-1), a vertical elliptical loop antenna (100-2, 300-2), a horizontal elliptical loop antenna (100-3, 300-3), a vertical grip-type loop antenna (100-4, 300-4), and a horizontal grip-type loop antenna (100-5, 300-5), as illustrated in FIG. 3, and the positions of the coupling portions coupled with the body portion (400) may be different, respectively.

For example, the circular loop antenna (100-1, 300-1) can be coupled to the body part (400) at any position on the circumference. In addition, the positions at which the vertical elliptical loop antenna (100-2, 300-2) and the horizontal elliptical loop antenna (100-3, 300-3) are coupled to the body part (400) differ depending on the curvature. In the case of the vertical elliptical antenna (100-2, 300-2), the part with the least curvature can be coupled to the body part (400), and in the case of the horizontal elliptical loop antenna (100-3, 300-3), the part with the greatest curvature can be coupled to the body part (400). Likewise, the vertical grip type loop antenna (100-4, 300-4) and the horizontal grip type loop antenna (100-5, 300-5) also have different positions at which they are coupled to the body part (400). In the case of the vertical grip type loop antenna (100-4, 300-4), a circular portion can be coupled to the body part (400), and in the case of the horizontal grip type loop antenna (100-5, 300-5), a straight portion can be coupled to the body part (400). Here, the shape and size of each of the transmitting antenna (100) and the magnetic field receiving antenna (300) can be the same or different.

In addition, the electric field receiving antenna (200) may be a monopole antenna. At this time, the tip of the electric field receiving antenna (200) may be directed vertically toward the ground surface or in the opposite direction.

The body part (400) above can fix the transmitting antenna (100), the electric field receiving antenna (200), and the magnetic field receiving antenna (300) at positions spaced apart from the ground surface in the vertical direction by a predetermined distance H, and the transmitting antenna (100) and the magnetic field receiving antenna (300) can be provided at positions where the distance between the center of the transmitting antenna (100) and the center of the magnetic field receiving antenna (300) becomes a predetermined distance W.

Specifically, the body part (400) may be provided with the transmitting antenna (100) and the magnetic field receiving antenna (300) at positions where the first virtual line (110) connecting the left and right inner sides based on the center of the transmitting antenna (100) and the second virtual line (310) connecting the left and right inner sides based on the center of the magnetic field receiving antenna (300) are horizontal to the ground surface. As a result, electromagnetic waves directly entering the magnetic field receiving antenna (300) can be minimized.

The signal processing unit (500) controls the transmitting antenna (100) and the body (400), and can receive electric field information and magnetic field information from the electric field receiving antenna (200) and the magnetic field receiving antenna (300), respectively.

In detail, the signal processing unit (500) can control the body unit (400) based on the H and W, and can control the transmitting antenna (100) to emit electromagnetic waves. Thereafter, the physical properties of the exploration target object (10) can be calculated based on the electric field information and magnetic field information received from the electric field receiving antenna (200) and the magnetic field receiving antenna (300), and the H and W.

More specifically, the signal processing unit (500) can calculate the properties of the exploration target object (10) within a distance that is half the distance of the W. At this time, the signal processing unit (500) can calculate the properties of the exploration target object (10) within a distance that satisfies the stored formula a when the H is a preset second predetermined range. Here, the formula a can be defined as in the following mathematical expression 1.

(Here, D is the exploration depth, W is the distance between the center of the transmitting antenna (100) and the center of the magnetic field transmitting antenna (100), and H is the height of the transmitting antenna (100), the electric field receiving antenna (200), and the magnetic field receiving antenna (300).)

In addition, the second predetermined range is greater than 1 m, but is not necessarily limited to this. However, as a result of conducting various experiments using an object exploration radar system according to one embodiment of the present invention, it was confirmed that when the H exceeds 1 m, the properties of an exploration target object (10) within a distance satisfying the mathematical expression 1 can be calculated, and therefore the present invention is limited to this.

FIG. 4 is a flowchart illustrating an object exploration method using an object exploration radar system according to one embodiment of the present invention. Referring to FIG. 4, the object exploration method using an object exploration radar system according to one embodiment of the present invention will be described in detail.

An object exploration method using an object exploration radar system according to one embodiment of the present invention is an object exploration method using an object exploration radar system that calculates properties of an exploration target object, and as illustrated in FIG. 4, may include a position adjustment step (S100), a signal transmission/reception step (S200), and a property calculation step (S300). Each step is operated using an object exploration radar system in which each step is performed by an operation processing means.

Let's take a closer look at each step:

The above position control step (S100) fixes the transmitting antenna (100), the electric field receiving antenna (200), and the magnetic field receiving antenna (300) at positions spaced apart from the ground surface in the vertical direction by a predetermined distance H, and controls the body (400) so that the transmitting antenna (100) and the magnetic field receiving antenna (300) are positioned at positions where the distance between the center of the transmitting antenna (100) and the center of the magnetic field receiving antenna (300) becomes a predetermined distance W.

In detail, the position adjustment step (S100) controls the body part (400) so that the transmitting antenna (100) and the magnetic field receiving antenna (300) are positioned at a position where the first virtual line (110) connecting the left and right inner sides based on the center of the transmitting antenna (100) and the second virtual line (310) connecting the left and right inner sides based on the center of the magnetic field receiving antenna (300) are horizontal to the ground surface. As a result, electromagnetic waves directly entering the magnetic field receiving antenna (300) from the transmitting antenna (100) can be minimized.

In addition, the transmitting antenna (100) and the magnetic field receiving antenna (300) may be loop antennas having a predetermined shape, and may have the shape of a circular loop antenna (100-1, 300-1), a vertical elliptical loop antenna (100-2, 300-2), a horizontal elliptical loop antenna (100-3, 300-3), a vertical grip-type loop antenna (100-4, 300-4), and a horizontal grip-type loop antenna (100-5, 300-5), and the positions of the coupling portions coupled with the body part (400) may be different. Here, the shape and size of each of the transmitting antenna (100) and the magnetic field receiving antenna (300) may be the same or different.

Additionally, the electric field receiving antenna (200) may be a monopole antenna.

In the signal transmission and reception step (S200), the signal processing unit (500) controls the transmitting antenna (100) to emit electromagnetic waves and receives electric field information and magnetic field information from the electric field receiving antenna (200) and the magnetic field receiving antenna (300), respectively.

In detail, the signal transmission/reception step (S200) controls the transmission antenna (100) to continuously emit one electromagnetic wave having a frequency within a preset first predetermined range, or to simultaneously and continuously emit two or more electromagnetic waves having different frequencies within the first predetermined range. In this case, the first predetermined range is 0.3 MHz or more and 30 MHz or less, but is not necessarily limited thereto.

More specifically, in the signal transmission/reception step (S200), when the transmitting antenna (100) emits electromagnetic waves toward the ground surface, the electromagnetic waves are absorbed by the exploration target object (10) within the exploration depth (D) based on the ground surface, and the magnetic component of the electromagnetic waves generates an eddy current in the exploration target object (10), and the exploration target object (10) is magnetically induced by the eddy current to generate an electric field and a magnetic field. Thereafter, the electric field receiving antenna (200) and the magnetic field receiving antenna (300) receive the electric field and the magnetic field of the exploration target object (10). However, the electromagnetic wave emission direction of the transmitting antenna (100) and the positions of the electric field and magnetic field receiving targets of the electric field receiving antenna (200) and the magnetic field receiving antenna (300) are not limited to the lower part of the ground surface, and electromagnetic waves may be emitted toward another external target or electric and magnetic fields may be received from another external target.

The above property calculation step (S300) calculates the property of the exploration target object (10) based on the H, W, electric field information, and magnetic field information in the signal processing unit (500).

In detail, the property calculation step (S300) can calculate the property for the exploration target object (10) within a distance that is 1/2 times the W. At this time, the property calculation step (S300) can calculate the property for the exploration target object (10) within a distance that satisfies the stored formula a when the H is a preset second predetermined range. Here, the formula a can be defined as in the mathematical expression 1 above. In addition, the second predetermined range exceeds 1 m, but is not necessarily limited thereto.

In summary, the object exploration radar system according to one embodiment of the present invention and the object exploration method using the same receive electric and magnetic fields induced from an exploration target object (10) by electromagnetic waves emitted from a transmission antenna (100) by an electric field receiving antenna (200) in the form of a monopole antenna and a magnetic field receiving antenna (300) in the form of a loop antenna, and analyze the physical properties of the exploration target object (10) by using the electric field information and the magnetic field information, thereby having the advantage of being able to identify the exact location and characteristics of the exploration target object (10).

Although the preferred embodiments of the present invention have been described above, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but are merely intended to explain it. Therefore, the technical idea of the present invention includes not only each disclosed embodiment but also a combination of the disclosed embodiments, and further, the scope of the technical idea of the present invention is not limited by these embodiments. In addition, those skilled in the art to which the present invention pertains can make numerous changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications should be considered as equivalents and falling within the scope of the present invention.

10: Object to be explored
100 : Transmitting antenna
110: 1st virtual line
200 : Electric field receiving antenna
300 : Magnetic field receiving antenna
310: 2nd virtual line
400 : Body
500 : Signal Processing Unit
100-1, 300-1 : Circular loop antenna
100-2, 300-2: Vertical elliptical loop antenna
100-3, 300-3: Horizontal elliptical loop antenna
100-4, 300-4: Vertical grip loop antenna
100-5, 300-5: Horizontal grip type loop antenna

Claims (14)

In an object exploration radar system that derives the properties of an object to be explored,
A transmitting antenna that emits electromagnetic waves;
An electric field receiving antenna that receives an electric field;
A magnetic field receiving antenna that receives a magnetic field;
A body part having the transmitting antenna, the electric field receiving antenna and the magnetic field receiving antenna fixed at positions spaced apart from the ground surface by a predetermined distance H in the vertical direction, and the transmitting antenna and the magnetic field receiving antenna provided at positions where the distance between the center of the transmitting antenna and the center of the magnetic field receiving antenna is a predetermined distance W; and
A signal processing unit that controls the transmitting antenna and the body and receives electric field information and magnetic field information from the electric field receiving antenna and the magnetic field receiving antenna, respectively;
The signal processing unit calculates the properties of the object to be explored based on the H, W, electric field information and magnetic field information.
An object detection radar system featuring:
In the first paragraph,
The above body part,
The transmitting antenna and the magnetic field receiving antenna are provided at positions where the first virtual line connecting the left and right inner sides based on the center of the transmitting antenna and the second virtual line connecting the left and right inner sides based on the center of the magnetic field receiving antenna are horizontal to the ground surface.
An object detection radar system featuring:
In the first paragraph,
The above transmitting antenna,
Continuously emitting one electromagnetic wave having a frequency within a preset first range, or
Simultaneously and continuously emitting two or more electromagnetic waves having different frequencies within the above first predetermined range.
An object detection radar system featuring:
In the first paragraph,
The above transmitting antenna and magnetic field receiving antenna are loop antennas having a predetermined shape.
An object detection radar system featuring:
In the first paragraph,
The above electric field receiving antenna is a monopole antenna.
An object detection radar system featuring:
In the first paragraph,
The above signal processing unit,
Calculating the properties of the target object within a distance of 1/2 of the above W
An object detection radar system featuring:
In Article 6,
The above signal processing unit,
When the above H is a preset second predetermined range, calculating the properties of the exploration target object within a distance satisfying the preset formula a
An object detection radar system featuring:
A method for exploring an object using an object exploration radar system that derives properties of an object to be explored.
A position control step of, in a signal processing unit, fixing a transmitting antenna, an electric field receiving antenna, and a magnetic field receiving antenna at positions each spaced apart from the ground surface in a vertical direction by a predetermined distance H, and controlling a body unit to position the transmitting antenna and the magnetic field receiving antenna at a position where the distance between the center of the transmitting antenna and the center of the magnetic field receiving antenna is a predetermined distance W;
In the signal processing unit, a signal transmission and reception step of controlling the transmitting antenna to emit electromagnetic waves and receiving electric field information and magnetic field information from the electric field receiving antenna and the magnetic field receiving antenna, respectively; and
In the signal processing unit, a property calculation step for calculating the property of the object to be investigated based on the H, W, electric field information and magnetic field information;
A method for exploring an object characterized by:
In Article 8,
The above position adjustment step is,
Controlling the body part so that the transmitting antenna and the magnetic field receiving antenna are positioned at a position where the first virtual line connecting the left and right inner sides based on the center of the transmitting antenna and the second virtual line connecting the left and right inner sides based on the center of the magnetic field receiving antenna are horizontal to the ground surface.
A method for exploring an object characterized by:
In Article 8,
The above signal transmission and reception steps are:
Controlling the above transmitting antenna to continuously emit one electromagnetic wave having a frequency within a preset first range, or
Simultaneously and continuously emitting two or more electromagnetic waves having different frequencies within the above first predetermined range.
A method for exploring an object characterized by:
In Article 8,
The above transmitting antenna and magnetic field receiving antenna are loop antennas having a predetermined shape.
An object exploration method characterized by:
In Article 8,
The above electric field receiving antenna is a monopole antenna.
An object exploration method characterized by:
In Article 8,
The above property calculation step is,
Calculating the properties of the target object within a distance of 1/2 of the above W
A method for exploring an object characterized by:
In Article 13,
The above property calculation step is,
When the above H is a preset second predetermined range, calculating the properties of the exploration target object within a distance satisfying the preset formula a
A method for exploring an object characterized by: