Electromagnetic wave energy detection device and system consisting thereof

Abstract

Electromagnetic wave energy detection device comprising: a waveguide (110) onto which electromagnetic wave energy is incident; an electromagnetic wave absorber (120) arranged at one end of the waveguide (110) and absorbing the electromagnetic wave energy incident on an end face of the electromagnetic wave absorber (120); parallel plates (140) arranged at a rear part of the electromagnetic wave absorber (120) and on and below a center line of the waveguide (110); a waveguide guide (130) for fixing the waveguide (110) and the electromagnetic wave absorber (120), wherein the parallel plates (140) are positioned in the waveguide guide (130); an electro-optical element (210) configured to detect the electromagnetic wave energy; an electro-optical element fixator (220) to which the electro-optical element (210) is coupled; and a motion guide (230) coupled to the electro-optic element fixator (220) and controlling the movement of the electro-optic element (210) into the interior of the waveguide guide (130) to capture the electromagnetic wave energy.

Description

BACKGROUND

[0001] The present disclosure relates to a system for measuring electromagnetic wave energy, and more particularly to an electromagnetic wave energy detection device using an electro-optical element that enables measurement of electromagnetic wave energy in a wide frequency band, and a system having the same.

[0002] Electromagnetic wave energy is an important measure that directly or indirectly affects the measurement of electromagnetic waves and is commonly used in the fields of telecommunications and semiconductors.

[0003] With the widespread use of traffic accident-avoiding radar technologies and fifth-generation mobile communications, it is more frequently necessary to measure electromagnetic wave energy in a millimeter-wave band.

[0004] Thermistor arrays are used to detect electromagnetic wave energy, but due to limitations in thermistor manufacturing technology and discontinuity in production, they are only applicable to a limited frequency band. Methods for detecting electromagnetic wave energy using thermocouples or diodes instead of thermistor arrays have been proposed. However, the methods for detecting electromagnetic wave energy using thermocouples are limited in terms of frequency band, and the methods for detecting electromagnetic wave energy using diodes are limited in terms of measurement accuracy due to the nonlinearity of a diode.

[0005] Therefore, it is necessary to develop an electromagnetic wave energy detection device capable of detecting electromagnetic wave energy in a wide frequency band, including a millimeter wave band, while maintaining the linearity of detecting electromagnetic wave energy.

[0006] CN 1 02 901 867 A discloses an independent heat-sensitive terahertz power probe with a heat circuit and relates to the technology of measuring electromagnetic wave power. The independent heat-sensitive electromagnetic wave power probe with a heat circuit consists of a terahertz waveguide, a power-sensitive body, and a heat sink base. The power-sensitive body is a core part and consists of a terahertz power absorber, a heat circuit support, and two heat-sensitive sensors. Electromagnetic terahertz waves enter the terahertz waveguide through a flange or an adapter and are absorbed by the terahertz power absorber in the terahertz waveguide and converted into heat. The terahertz power absorber is heated, while the heat is transferred to the heat sink base via the heat sink.The two heat-sensitive sensors at two different positions on the heating circuit support can measure the temperature difference between the positions. Under thermal equilibrium, the temperature difference and the power of the electromagnetic terahertz wave are directly related. The power probe is calibrated to feed electrical energy into the first heat-sensitive sensor. The independent heat-sensitive terahertz power probe with thermal circuit solves the problem of measuring the power of terahertz waves.

[0007] DE 694 27 219 T2 discloses an electric field sensor comprising a sensor head that varies the intensity of the light transmitted through it depending on the strength of the applied electric field; an optical fiber that guides light from a light source to the head; an optical fiber that guides the light transmitted through the head to a photoelectric transducer; and a measuring device that measures and displays electrical signals from the transducer. This sensor detects electromagnetic noise or electromagnetic leakage through changes in light intensity without bringing the head into contact with a source of electromagnetic noise or leakage, but rather by positioning the head near the source.

[0008] DE 11 2012 004 046 B4 discloses an apparatus for detecting an electromagnetic wave, comprising: an optical waveguide having a non-linear crystal and comprising a branching part for receiving a probe light pulse and for causing the probe light pulse to split into two branch light beams, the optical waveguide further comprising two branch light transmitting parts for receiving and transmitting the branch light from the branching part;an electromagnetic wave input unit that inputs an electromagnetic wave having a frequency greater than or equal to 0.01 THz and less than or equal to 100 THz, which is inclined at an angle that produces Cherenkov phase matching with respect to a propagation direction of the branch light in one of the two branch light transmission parts, and a phase difference measuring unit that measures a phase difference between two branch light beams transmitted in the two branch light transmission parts; SUMMARY

[0009] The present disclosure provides an electromagnetic wave energy detection device for measuring electromagnetic wave energy in a wide frequency band and a system comprising the same.

[0010] The present disclosure also provides an electromagnetic wave energy detection device for measuring electromagnetic wave energy while ensuring linearity.

[0011] An embodiment of the inventive concept provides an electromagnetic wave energy detection device comprising: a waveguide onto which electromagnetic wave energy is incident; an electromagnetic wave absorber disposed at one end of the waveguide and which absorbs the electromagnetic wave energy incident on an end surface of the electromagnetic wave absorber; parallel plates disposed at a rear part of the electromagnetic wave absorber and on and below a center line of the waveguide; a waveguide guide for fixing the waveguide and the electromagnetic wave absorber, the parallel plates being positioned in the waveguide guide; an electro-optical element configured to detect the electromagnetic wave energy; an electro-optical element fixer to which the electro-optical element is coupled;and a motion guide coupled to the electro-optic element fixer and controlling the movement of the electro-optic element into the interior of the waveguide guide to capture the electromagnetic wave energy;

[0012] In one embodiment, the motion guide may control the electro-optical element so that the electro-optical element is positioned between the parallel plates to measure a reference signal, and may control the electro-optical element so that the electro-optical element is positioned in the waveguide positioned at a front part of the electromagnetic wave absorber to measure an electromagnetic wave energy detection signal.

[0013] In one embodiment, the parallel plates may receive one of a DC voltage and a low frequency voltage as a reference voltage.

[0014] In one embodiment, the parallel plates may comprise a positive plate and a negative plate, wherein the positive plate and the negative plate may be arranged parallel to each other on the waveguide guide.

[0015] In one embodiment, a positive plate insertion groove for inserting the positive plate and a negative plate insertion groove for inserting the negative plate may be formed in the waveguide guide.

[0016] In one embodiment, the waveguide guide may have a hole formed therein such that the electro-optical element moves therethrough with respect to the centerline of the waveguide.

[0017] In one embodiment, the electro-optical element fixer may include a structure rotatable on the motion guide so that the electro-optical element is rotated.

[0018] In one embodiment, a part of the end face of the electromagnetic wave absorber may form an inclined surface having a predetermined inclination with respect to the center line of the waveguide.

[0019] In one embodiment, the electromagnetic wave absorber may have a hole formed therein to allow an electro-optic crystal of the electro-optic element to move forward on the waveguide.

[0020] In one embodiment, the electro-optical element fixer may comprise a structure that rotates on the motion guide to obtain an optimal response characteristic from the electro-optical element.

[0021] In one embodiment of the inventive concept, a system comprises: an electromagnetic wave energy detection device configured to output a reference signal and a detection signal according to a result of detecting an electromagnetic wave energy signal by an electro-optical element; and a measuring device configured to receive the reference signal and the detection signal for measuring the electromagnetic wave energy, wherein the electromagnetic wave energy detection device comprises: a waveguide onto which electromagnetic wave energy is incident; an electromagnetic wave absorber arranged at one end of the waveguide and which absorbs the electromagnetic wave energy incident on an end surface of the electromagnetic wave absorber;parallel plates arranged at a rear portion of an electromagnetic wave absorber and on and below a centerline of the waveguide; a waveguide guide for fixing the waveguide and the electromagnetic wave absorber, the parallel plates positioned in the waveguide guide; an electro-optical element configured to detect the electromagnetic wave energy; an electro-optical element fixer to which the electro-optical element is coupled; and a movement guide coupled to the electro-optical element fixer and which places the electro-optical element between the parallel plates to output the reference signal or places the electro-optical element in the waveguide guide to output the detection signal.

[0022] In one embodiment, the system may further comprise an electromagnetic wave energy generator configured to output an electromagnetic wave energy signal according to different frequency bands to the electromagnetic wave energy detecting device by controlling the measuring device.

[0023] In one embodiment, the parallel plates may comprise a positive plate and a negative plate arranged parallel to each other on the waveguide guide, wherein one of a DC voltage and a low frequency voltage may be applied to the positive plate and the negative plate as a reference voltage.

[0024] In one embodiment, a positive plate insertion groove for inserting the positive plate and a negative plate insertion groove for inserting the negative plate may be formed in the waveguide guide.

[0025] In one embodiment, the waveguide guide may have a hole formed therein such that the electro-optical element moves therethrough with respect to the centerline of the waveguide.

[0026] In one embodiment, the electro-optical element fixer may include a structure rotatable on the motion guide so that the electro-optical element is rotated.

[0027] In one embodiment, a part of the end face of the electromagnetic wave absorber may form an inclined surface having a predetermined inclination with respect to the center line of the waveguide.

[0028] In one embodiment, the electromagnetic wave absorber may have a hole formed therein to allow an electro-optic crystal of the electro-optic element to move forward on the waveguide.

[0029] In one embodiment, the electro-optical element fixer may include a structure that rotates on the motion guide to obtain optimal response characteristics from the electro-optical element. BRIEF DESCRIPTION OF THE CHARACTERS

[0030] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain the principles of the inventive concept. In the drawings: Fig. 1 is a diagram exemplifying an electromagnetic wave energy detection device according to an embodiment of the inventive concept; Fig. 2 a diagram showing the movement of the electromagnetic wave energy detection device of Fig. 1 illustrates; Fig. 3 is a diagram showing the electro-optical element of Fig. 1 illustrates by way of example; Fig. 4 is a side sectional view showing the electromagnetic wave energy detection device of Fig. 1 illustrates an example in which the electro-optical element is positioned between parallel plates; Fig. 5 is a side sectional view showing the electromagnetic wave energy detecting device of Fig. 1 illustrates an example in which the electro-optical element is positioned in the waveguide; Fig. 6 is a diagram showing a system for measuring electromagnetic wave energy using the electromagnetic wave energy detecting device of Fig. 1 is illustrated by way of example; and Fig. 7 a diagram showing the measuring device of Fig. 6 is illustrated by way of example. DETAILED DESCRIPTION

[0031] Embodiments of the inventive concept will be described in detail with reference to the accompanying drawings. It should be noted that only descriptions necessary to assist in understanding the embodiments are provided below, and unnecessarily detailed descriptions are omitted below so that the inventive concept is not compromised.

[0032] The inventive concept provides an electromagnetic wave energy detection device implemented using an electro-optical (EO) element.

[0033] Fig. 1 is a diagram exemplifying an electromagnetic wave energy detection device according to an embodiment of the inventive concept.

[0034] With reference to Fig. 1, an electromagnetic wave energy detection device 10 includes a waveguide unit 100 and an electro-optical element unit 200. An electro-optical element 210 is coupled to the electro-optical element unit 200 for detecting electromagnetic wave energy introduced through the waveguide unit 100.

[0035] The waveguide unit 100 includes a waveguide 110, an electromagnetic wave absorber 120, a waveguide guide 130, and parallel plates 140.

[0036] The waveguide 110, which is a path through which electromagnetic wave energy is incident, provides the electromagnetic wave energy in an incident direction. A waveguide centerline 20 is formed with respect to a direction 30 in which the electromagnetic wave energy is incident through the waveguide 110.

[0037] The electromagnetic wave absorber 120 is coupled to one end of the waveguide 110. The electromagnetic wave absorber 120 absorbs the electromagnetic wave energy provided by the waveguide 110 so that the electromagnetic wave energy is not reflected, thereby enabling accurate measurement of the electromagnetic wave energy. Here, the electromagnetic wave absorber 120 has a hole formed therein so that the electro-optical element 120 extends through it and into the waveguide 110.

[0038] The waveguide 110 and the electromagnetic wave absorber 120 and one side of the waveguide guide 130 are inserted into the electro-optical element unit 200. The waveguide guide 130 may have an internal path, that is, a hole formed on one side thereof, which is coupled to the electro-optical element unit 200, so that the electro-optical element 210 moves through the internal path to the waveguide 110.

[0039] The parallel plates 140 include two plates, namely, a positive plate 141 and a negative plate 142. The parallel plates 140 are arranged parallel to each other with respect to a central axis of the waveguide. The parallel plates 140 are positioned opposite the waveguide 110 with respect to the electromagnetic wave absorber 120. Here, provided that a surface of the electromagnetic wave absorber 120 on which the electromagnetic wave energy is incident is an end face, the parallel plates 140 are positioned at a rear part of the electromagnetic absorber 120.

[0040] The parallel plates 140 receive a reference signal when the electromagnetic wave energy is measured by the electro-optical element. To this end, one of a direct current (DC) voltage and a low-frequency voltage may be applied to the parallel plates 140 as a reference voltage. Conductive cables (not shown) for applying a voltage may be formed in the parallel plates 140 so that the reference voltage can be applied. Here, the reference voltage to be applied to the parallel plates 140 may be generated, for example, by an external device (not shown) or a reference voltage generator (not shown) included in the electromagnetic wave energy detection device 100.

[0041] The electro-optical element unit 200 includes the electro-optical element 210, an electro-optical element fixer 220, and a movement guide 230.

[0042] The electro-optical element 210, which serves to detect electromagnetic wave energy, generates an optical signal directly proportional to the microwave energy. This optical information is converted into an electrical signal according to a result of the detection of the electromagnetic wave energy.

[0043] The electro-optical element fixator 220 fixes the electro-optical element 210 so that the electro-optical element 210 does not move, and has a shape, such as a cylindrical shape, for rotating the electro-optical element 210 on the motion guide 230. Therefore, the electro-optical element fixator 220 can rotate the electro-optical element 210 so that the electro-optical element 210 can be in a position for obtaining optimal response characteristics. To this end, the electro-optical element fixator 220 can be formed into various shapes, such as a groove, a screw, a barrel, or the like, allowing the electro-optical element fixator 220 to rotate without being fixed to the motion guide 230. In addition, a groove, a hole, or the like for coupling the electro-optical element 210 may be formed near a center of the electro-optical element fixer 220.

[0044] One side of the motion guide 230 is coupled to the electro-optic element fixator 220, and another side of the motion guide 230 has a shape for receiving the waveguide guide 130 therein. The motion guide 230 can move on the waveguide guide 130 to control a position of the electro-optic element 210.

[0045] The motion guide 230 moves on the waveguide guide 130 so that the electro-optic element 210 is positioned between the parallel plates 140 to receive the reference signal. Furthermore, the motion guide 230 moves on the waveguide guide 130 so that the electro-optic element 210 is positioned within the waveguide 110 to detect electromagnetic wave energy. Fig. 1 illustrates an example of a direction of movement 40 of the movement guide 230 with respect to the waveguide center line 20.

[0046] As described above, since the electromagnetic wave energy detection device 10 proposed in the present disclosure detects electromagnetic wave energy using the electro-optical element 210, a frequency band for measuring electromagnetic wave energy can extend to millimeter waves or beyond, and linearity can be ensured up to higher energy specifications. That is, the electromagnetic wave energy detection device 10 proposed in the present disclosure can measure electromagnetic wave energy without using elements limited in a frequency band or nonlinear elements.

[0047] Fig. Figure 2 is a diagram showing the movement of the electromagnetic wave energy detection device of Fig. 1 illustrates.

[0048] With reference to Fig. 2, in the electromagnetic wave energy detection device 10, the waveguide unit 100 is coupled to the electro-optical element unit 200 via the waveguide guide 130.

[0049] When electromagnetic wave energy is actually measured in response to the incident 30 of electromagnetic waves, it may be necessary for the electro-optical element 210 (in particular, an end portion (electro-optical crystal) of the electro-optical element 210) to be positioned in the waveguide 110, that is, at the front part of the electromagnetic wave absorber 120 in the waveguide 110.

[0050] To this end, as soon as the motion guide 230 moves in a direction in which the waveguide guide 130 is inserted therein (ie, in a direction in which the electromagnetic wave energy is incident), the electro-optical element 210 is positioned in the waveguide 110.

[0051] The electro-optical element 210 measures the electromagnetic wave energy incident through the waveguide 110 and outputs a measured value.

[0052] Fig. 3 is a diagram showing the electro-optical element of Fig. 1 illustrates this as an example.

[0053] With reference to Fig. 3, the electro-optical element 210 may include an electro-optical crystal 211 and a light guide line 212. Here, for convenience, the electro-optical crystal 211 and the light guide line 212 are considered as one electro-optical element. However, the electro-optical element 211 alone may be considered the electro-optical element.

[0054] The electro-optic crystal 211 generates an optically modulated signal according to the electromagnetic wave energy incident through an end face of the electro-optic crystal 211. The electro-optic crystal 211 outputs the optical signal to the optical fiber line 212.

[0055] The optical fiber line 212 can deliver the optically modulated signal to a measuring detector or the like, so that the electrical signal corresponding to the measured electromagnetic wave energy is provided to the measuring detector or the like.

[0056] Fig. 4 is a side sectional view showing the electromagnetic wave energy detecting device of Fig. 1, in which the electro-optical element is positioned between the parallel plates 140.

[0057] With reference to Fig. 4, when the electro-optical element 210 is positioned between the parallel plates 140 of the waveguide unit 100, a reference voltage, a direct current voltage, or a low-frequency voltage is applied to the positive plate 141 and the negative plate 142 of the parallel plates 140 to obtain a reference signal V_eo_ref of the electro-optical element 210. At this time, the electro-optical element 210 outputs an electrical signal, i.e., the reference signal V_eo_ref, in proportion to an applied direct current voltage or low-frequency voltage.

[0058] An electric field is induced between the parallel plates 140 according to a distance d between the positive plate 141 and the negative plate 142 and a voltage V applied to the parallel plates 140. The amplitude of a response signal of the electro-optical element 210 varies with the direction of the electric field. Therefore, the electro-optical element fixer 220 can rotate the electro-optical element 210 positioned between the parallel plates in which the electric field is generated, so that the electro-optical element 210 can be brought into a position where the output of the electro-optical element 210 is maximized.

[0059] After receiving the reference signal as in Fig. 5, the electro-optical element 210 moves through the motion guide 230 to detect electromagnetic wave energy.

[0060] Fig. 5 is a side sectional view showing the electromagnetic wave energy detecting device of Fig. 1, in which the electro-optical element is positioned in the waveguide.

[0061] With reference to Fig. 5, the electro-optical element 210 is positioned in the waveguide 110. The electro-optical element 210 passes through the hole formed in the electromagnetic wave absorber 120 to move into the waveguide 110. Electromagnetic wave energy incident on the waveguide 110 is converted into heat energy and dissipates upon transfer to the electromagnetic wave absorber 120. Therefore, only incident electromagnetic wave energy is applied to the electro-optical element 210.

[0062] Here, a portion of the end surface of the electromagnetic absorber 120 positioned in an incident direction of the electromagnetic wave energy, that is, a portion of the electromagnetic absorber 120 adjacent to the inner side of the waveguide, is inclined at a predetermined angle X with respect to the incident direction of the electromagnetic wave energy. By this structure, the reflected amount is reduced by heat dissipation due to the electromagnetic absorber 120.

[0063] In addition, the electro-optical element 210 outputs an electrical signal, ie, a detection signal V_eo_rf, according to the incidence of the electromagnetic wave energy.

[0064] Fig. 6 is a diagram showing a system for measuring electromagnetic wave energy using the electromagnetic wave energy detecting device of Fig. 1 illustrates this as an example.

[0065] With reference to Fig. 6, an electromagnetic wave energy detection system 300 includes the electromagnetic wave energy detection device 10 and a measuring device 310. The measuring device 310 can receive the reference signal V_eo_ref and the detection signal V_eo_rf output from the electromagnetic wave energy detection device 10.

[0066] The measuring device 310 can receive the reference signal V_eo_ref via the optical fiber line 212 of the electro-optical element 210 when the electro-optical element 210 is positioned at a first location between the parallel plates 140 of the electromagnetic wave energy detection device 10.

[0067] Then, when the electro-optical element 210 is positioned at a second location in the waveguide 110 of the electromagnetic wave energy detection device 10, the measuring device 310 can receive the detection signal V_eo_rf via the optical fiber line 212 of the electro-optical element.

[0068] The measuring device 310 can receive the reference signal V_eo_ref and the detection signal V_eo_rf and can measure electromagnetic wave energy by comparing the received signals (V_eo_ref and V_eo_rf).

[0069] The measuring system 300 may further be provided with an electromagnetic wave energy generator 320. The electromagnetic wave energy generator 320 generates electromagnetic wave energy according to various frequency bands.

[0070] The measuring device 310 receives the reference signal V_eo_ref via the electro-optical element 210 and controls the electromagnetic wave energy generator 320 so that the electromagnetic wave energy generator 320 outputs electromagnetic wave energy of various frequency bands. Thus, after receiving the detection signal V_eo_rf of various frequency bands, the measuring device 310 can provide and correct characteristics of the electro-optical element 210 by comparing the received signal with the reference signal V_eo_ref.

[0071] In the electromagnetic wave energy detection device 10, the electro-optical element 210 may be replaced by another electro-optical element so that characteristics are provided and corrected for each electro-optical element.

[0072] Fig. 7 is a diagram showing the measuring device of Fig. 6 is illustrated by way of example.

[0073] With reference to Fig. 7, the measuring device 310 comprises an electromagnetic wave energy measuring unit 311, an input unit 312, a control unit 313 and an output unit 314.

[0074] The electromagnetic wave energy measuring unit 311 measures an electrical signal input via the optical fiber line of the electro-optical element 210. The electromagnetic wave energy measuring unit 311 measures electrical signals of the reference signal V_eo_ref and the detection signal V_eo_rf, and outputs the measured values ​​to the output unit 314.

[0075] The input unit 312 can receive a user control signal for operating the measuring device 310. The input unit 312 can output the user control signal to the control unit 313. The input unit 312 can receive the user control signal via various types of input devices, such as a mouse, a keyboard, a touchpad, an electronic pen, etc.

[0076] The control unit 313 controls the overall operation of the measuring device 310. The control unit 313 can analyze a measured value received via the electromagnetic wave energy measuring unit and output the analyzed electromagnetic wave energy via the output unit 314. Furthermore, in the case where the electromagnetic wave energy generator 320 is provided, the control unit 313 can control the electromagnetic wave energy generator 320 so that the electromagnetic wave energy generator 320 outputs electromagnetic wave energy in a specific frequency band.

[0077] The output unit 314 can output the electromagnetic wave energy received from the control unit 313 via an output device such as a display unit.

[0078] As described above, the electromagnetic wave energy detecting device proposed in the present disclosure can be installed in a precision electromagnetic wave energy detecting device such as a microcalorimeter so that it is used as a reference standard.

[0079] The electromagnetic wave energy detection device according to an embodiment of the inventive concept can measure electromagnetic wave energy using an electro-optical element, and thus can measure the electromagnetic wave energy at a broadband frequency. Furthermore, since the electromagnetic wave energy detection device does not use an element such as a nonlinear diode, the electromagnetic wave energy detection device can accurately measure electromagnetic wave energy by ensuring the linearity of the measurement of the electromagnetic wave energy.

[0080] The above-disclosed subject matter is to be considered illustrative and not restrictive, and the appended claims are intended to cover all modifications, improvements, and other embodiments that fall within the true spirit and scope of the inventive concept. Thus, to the maximum extent permitted by law, the scope of the inventive concept is to be determined by the broadest permissible interpretation of the following claims and their equivalents, and is not to be restricted or limited by the foregoing detailed description.

Claims

[1] Electromagnetic wave energy detection device comprising: a waveguide (110) onto which electromagnetic wave energy is incident; an electromagnetic wave absorber (120) arranged at one end of the waveguide (110) and absorbing the electromagnetic wave energy incident on an end face of the electromagnetic wave absorber (120); parallel plates (140) arranged at a rear part of the electromagnetic wave absorber (120) and on and below a center line of the waveguide (110); a waveguide guide (130) for fixing the waveguide (110) and the electromagnetic wave absorber (120), wherein the parallel plates (140) are positioned in the waveguide guide (130); an electro-optical element (210) configured to detect the electromagnetic wave energy; an electro-optical element fixator (220) to which the electro-optical element (210) is coupled; and a motion guide (230) coupled to the electro-optic element fixator (220) and controlling the movement of the electro-optic element (210) into the interior of the waveguide guide (130) to capture the electromagnetic wave energy. [2] The electromagnetic wave energy detection device according to claim 1, wherein the movement guide (230) controls the electro-optical element (210) so that the electro-optical element (210) is positioned between the parallel plates (140) to measure a reference signal, and controls the electro-optical element (210) so that the electro-optical element (210) is positioned in the waveguide (110) positioned at a front part of the electromagnetic wave absorber (120) to measure an electromagnetic wave energy detection signal. [3] An electromagnetic wave energy detecting device according to claim 1, wherein said parallel plates (140) receive one of a DC voltage and a low frequency voltage as a reference voltage. [4] An electromagnetic wave energy detection device according to claim 3, wherein the parallel plates (140) comprise a positive plate and a negative plate, wherein the positive plate (141) and the negative plate (142) are arranged parallel to each other on the waveguide guide (130). [5] An electromagnetic wave energy detecting device according to claim 4, wherein a positive plate insertion groove for inserting the positive plate and a negative plate insertion groove for inserting the negative plate are formed in the waveguide guide (130). [6] An electromagnetic wave energy detecting device according to claim 4, wherein the waveguide guide (130) has a hole formed therein so that the electro-optical element (210) moves therethrough with respect to the center line of the waveguide (110). [7] The electromagnetic wave energy detecting device according to claim 4, wherein the electro-optical element fixer (220) has a structure rotatable on the movement guide (230) so that the electro-optical element (210) is rotated. [8] An electromagnetic wave energy detecting device according to claim 1, wherein a part of the end surface of the electromagnetic wave absorber (120) forms an inclined surface having a predetermined inclination with respect to the center line of the waveguide (110). [9] An electromagnetic wave energy detecting device according to claim 8, wherein the electromagnetic wave absorber (120) has a hole formed therein to allow an electro-optical crystal (211) of the electro-optical element (210) to advance on the waveguide (110). [10] The electromagnetic wave energy detecting device according to claim 1, wherein the electro-optical element fixer (220) comprises a structure that rotates on the movement guide (230) to obtain an optimal response characteristic from the electro-optical element (210). [11] System which has the following: an electromagnetic wave energy detection device configured to output a reference signal and a detection signal according to a result of detecting an electromagnetic wave energy signal by an electro-optical element (210); and a measuring device (310) configured to receive the reference signal and the detection signal to measure electromagnetic wave energy, wherein the electromagnetic wave energy detection device comprises: a waveguide (110) onto which electromagnetic wave energy is incident; an electromagnetic wave absorber (120) arranged at one end of the waveguide (110) and absorbing the electromagnetic wave energy incident on an end face of the electromagnetic wave absorber (120); parallel plates (140) arranged at a rear part of the electromagnetic wave absorber (120) and on and below a center line of the waveguide (110); a waveguide guide (130) for fixing the waveguide (110) and the electromagnetic wave absorber (120), wherein the parallel plates (140) are positioned in the waveguide guide (130); an electro-optical element (210) configured to detect the electromagnetic wave energy; an electro-optical element fixator (220) to which the electro-optical element (210) is coupled; and a motion guide (230) coupled to the electro-optic element fixer (220) and placing the electro-optic element (210) between the parallel plates (140) to output the reference signal, or placing the electro-optic element (210) in the waveguide guide (130) to output the detection signal. [12] The system according to claim 11, further comprising an electromagnetic wave energy generator (320) configured to output an electromagnetic wave energy signal according to different frequency bands to the electromagnetic wave energy detecting device by controlling the measuring device (310). [13] System according to claim 11, wherein the parallel plates (140) comprise a positive plate (141) and a negative plate (142) arranged parallel to each other on the waveguide guide (130), wherein one of a DC voltage and a low frequency voltage is applied as a reference voltage to the positive plate (141) and the negative plate (142). [14] The system according to claim 13, wherein a positive plate insertion groove (141) for inserting the positive plate (141) and a negative plate insertion groove (142) for inserting the negative plate (142) are formed in the waveguide guide (130). [15] The system of claim 14, wherein the waveguide guide (130) has a hole formed therein such that the electro-optical element (210) moves therethrough with respect to the centerline of the waveguide (110). [16] The system of claim 11, wherein the electro-optical element fixer (220) comprises a structure rotatable on the movement guide (230) so that the electro-optical element (210) is rotated. [17] The system according to claim 11, wherein a part of the end surface of the electromagnetic wave absorber (120) forms an inclined surface having a predetermined inclination with respect to the center line of the waveguide (110). [18] The system of claim 17, wherein the electromagnetic wave absorber (120) has a hole formed therein to allow an electro-optic crystal of the electro-optic element (210) to advance on the waveguide (110). [19] The system of claim 11, wherein the electro-optic element fixator (220) comprises a structure that rotates on the motion guide (230) to obtain an optimal response characteristic from the electro-optic element (210).

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