JP2018169201A - Radiated disturbing wave measurement device, and determination method therefor - Google Patents

Abstract

To provide a radiated disturbing wave measurement method capable of efficiently determining whether pr not an electric field intensity distribution is correctly measured, and the determination method therefor.SOLUTION: A radiated disturbing wave measurement device includes: a position control mechanism for changing a relative position of an antenna for a radiation source to each position of a plurality of measurement positions on a surface surrounding the radiation source; a control unit for executing a first operation for measuring an electric field intensity distribution by measuring the electric field intensity of a radiated disturbing wave received by the antenna at the plurality of measurement points and a second operation for measuring the electric field intensity received by the antenna during a change of the relative position of the antenna; and an arithmetic processing unit for determining whether or not the electric field intensity distribution is correctly measured using the electric field intensity measured by the first operation and the second operation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiation interference wave measuring apparatus and a determination method thereof.

  Conventionally, in a so-called radiated disturbance test that measures radiated disturbances emitted from electronic devices, etc., the electric field intensity of the radiated disturbances is measured for a certain period of time at a position where the electric field intensity of the radiated disturbances is maximum. It is confirmed whether or not the measured electric field strength is less than or equal to an allowable value of an internationally defined standard.

  In this radiation interference wave test, since it is necessary to find a position where the electric field intensity is maximum for each frequency in the frequency band of 30 to 1000 MHz, a so-called spectrum analyzer capable of measuring a spectrum in a wide band is used.

  By the way, the spectrum analyzer measures the frequency spectrum while changing (sweeping) the frequency that can be measured with a predetermined resolution bandwidth every predetermined time (sampling time). For this reason, the spectrum analyzer has a problem in that if a radiated disturbance wave is generated at a frequency other than the sampling frequency while sampling a certain frequency, the radiated disturbance wave cannot be captured.

  That is, when the generation period of the radiated disturbance wave exceeds the sampling time of the spectrum analyzer, since the capture rate of the radiated disturbance wave is less than 100%, the measurement point where the radiated disturbance wave can be captured and the radiated disturbance wave cannot be captured. There will be measurement points. Therefore, the position where the maximum electric field strength can be obtained cannot be selected correctly from the electric field strength obtained by measuring with a spectrum analyzer, and the correct test result cannot be obtained. .

  In order to solve this problem, it is determined whether or not the electric field strength is accurately measured by determining whether or not there is a radiation interference wave (hereinafter referred to as “intermittent noise”) whose generation period exceeds the sampling time. Has been proposed (see Patent Document 1). In the method described in Patent Document 1, electric field strength is measured for each frequency sweep of a spectrum analyzer at each measurement point, and the presence / absence of intermittent noise is determined by analyzing temporal change in electric field strength for each frequency. .

Japanese Patent No. 4915050

  However, in the invention described in Patent Document 1, the frequency sweep of the spectrum analyzer is performed a plurality of times at each measurement point in order to analyze the temporal level change of the electric field strength. Therefore, the measurement time of the electric field strength at each measurement point increases. Therefore, in the invention described in Patent Document 1, it takes a long time to determine whether or not the electric field strength distribution has been accurately measured.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a radiated disturbance measuring apparatus capable of efficiently determining whether or not the electric field intensity distribution has been accurately measured, and a determination method thereof. Is to provide.

  One aspect of the present invention is a radiation interference wave measuring apparatus that determines whether or not an electric field intensity distribution formed on a surface surrounding a radiation source of a radiation interference wave is correctly measured, and receives the radiation interference wave An antenna, a position control mechanism for changing a relative position of the antenna with respect to the radiation source to positions of a plurality of measurement points on a surface surrounding the radiation source, and the antenna received by the antenna at the plurality of measurement points A first operation for measuring the electric field intensity distribution by measuring the electric field intensity of the radiation interference wave; and a second operation for measuring the electric field intensity received by the antenna while changing the relative position of the antenna. An operation processing unit for determining whether or not the electric field strength distribution is correctly measured using the electric field strengths measured in the first operation and the second operation; Specially equipped with A radiated emission measuring device according to.

  One aspect of the present invention is the above-described radiation interference wave measuring apparatus, wherein the arithmetic processing unit is configured to determine the maximum electric field intensity measured in the first operation and the electric field measured in the second operation. When the difference value from the maximum intensity value is equal to or greater than a predetermined threshold value, it is determined that the electric field intensity distribution measured in the first operation is not correctly measured.

  One aspect of the present invention is a radiation interference wave measuring apparatus that includes an antenna that receives a radiation interference wave and determines whether or not an electric field intensity distribution formed on a surface surrounding the radiation interference wave radiation source is correctly measured. A position control step of changing a relative position of the antenna with respect to the radiation source to each position of a plurality of measurement points on a surface surrounding the radiation source, and the antenna at the plurality of measurement points A first operation step of measuring the electric field intensity distribution by measuring the electric field intensity of the radiated interference wave received at the step, and the electric field intensity received by the antenna while changing the relative position of the antenna. It is determined whether or not the electric field strength distribution is correctly measured using the electric field strengths measured in the second operation step to be measured, the first operation step, and the second operation step. A calculation processing step, a determination method comprising.

  As described above, according to the present invention, it is possible to efficiently determine whether or not the electric field strength distribution has been accurately measured.

It is a figure which shows an example of schematic structure of the radiation interference wave measuring apparatus A which concerns on one Embodiment of this invention. It is a figure explaining the measurement principle of the measuring device 4 which concerns on one Embodiment of this invention. It is a block diagram which shows the hardware constitutions of the control apparatus 6 which concerns on one Embodiment of this invention. It is a figure explaining the relationship between the generation period of intermittent noise, and a residence time. It is a flowchart of a series of operation | movement of the position estimation method of the maximum electric field strength which concerns on one Embodiment of this invention. It is a figure which shows an example of electric field strength distribution which the measuring device 4 which concerns on one Embodiment of this invention measured. It is a figure explaining the method of the verification experiment which concerns on one Embodiment of this invention. The contour map which showed the electric field strength measured by the verification experiment which concerns on one Embodiment of this invention.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention. In the drawings, the same or similar parts may be denoted by the same reference numerals and redundant description may be omitted. In addition, the shape and size of elements in the drawings may be exaggerated for a clearer description.

  Hereinafter, a radiation interference wave measuring apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of a radiation interference measurement apparatus A according to an embodiment of the present invention. The radiated disturbance measurement apparatus A is an apparatus used for a radiated disturbance test that measures a radiated disturbance emitted from the radiation source 100 as a specimen, for example, according to the EMC standard. The radiation interference wave measuring apparatus A is disposed in an anechoic chamber having a metal floor formed from a ground plane. The anechoic chamber is configured by attaching an electromagnetic wave absorber to the wall surface of the shield room excluding the metal floor surface. Here, the radiation source 100 is an electronic device or the like that emits radiation interference waves.

  As shown in FIG. 1, the radiation interference wave measuring apparatus A includes a receiving antenna 1, an antenna mast 2, a turntable 3, a measuring device 4, a drive control unit 5, and a control device 6. The antenna mast 2, the turntable 3, and the drive control unit 5 constitute a “position control mechanism” of the present invention.

  The receiving antenna 1 is attached to the antenna mast 2 and is disposed at a position separated from the radiation source 100 by a predetermined distance. The receiving antenna 1 receives a radiation interference wave radiated from the radiation source 100.

The antenna mast 2 supports the receiving antenna 1. The antenna mast 2 raises and lowers the receiving antenna 1 under the control of the drive control unit 5.
The turntable 3 is, for example, a disk-shaped turntable attached to a ground plane. The turntable 3 can rotate around an axis in a direction perpendicular to the ground plane under the control of the drive control unit 5. On the turntable 3, for example, a radiation source 100 as a specimen is placed via a table 200.

The measuring device 4 is connected to the receiving antenna 1 via a communication cable, for example.
The measuring device 4 measures the frequency spectrum of the electric field strength received by the receiving antenna 1. Specifically, the measuring device 4 measures the frequency spectrum of the electric field intensity received by the receiving antenna 1 at a predetermined residence time at a plurality of measurement points set on the surface surrounding the radiation source 100. Thereby, the measuring device 4 can measure the electric field strength distribution formed on the surface surrounding the radiation source 100. For example, the measuring instrument 4 is a superheterodyne spectrum analyzer.

  For example, as shown in FIG. 2, the measuring device 4 measures the frequency spectrum while changing (sweeping) the frequency that can be measured with the resolution bandwidth 300 every predetermined sampling time. In this case, the dwell time is a sampling time at the specific frequency described above, which is a time obtained by dividing the sweep time by the number of sweep points. However, the measuring device 4 of the present invention is not limited to a superheterodyne spectrum analyzer, and may be, for example, an FFT-based spectrum analyzer. In this case, the residence time is a time waveform sampling time.

Here, the measuring device 4 includes a MaxHold function and a Clear / Write function.
The MaxHold function is a function that holds and records the maximum value of the electric field strength for each frequency received by the receiving antenna 1.
The Clear / Write function is a function of recording the electric field intensity received by the receiving antenna 1 for each frequency for each sampling (sweep).

  The drive control unit 5 is connected to each of the antenna mast 2 and the turntable 3 via a communication cable. Moreover, the drive control part 5 is connected to the control apparatus 6 via the communication cable, for example.

  The drive control unit 5 can change the relative position of the receiving antenna 1 with respect to the radiation source 100. The drive control unit 5 rotates the turntable 3 at predetermined angular intervals under the control of the control device 6. Further, the drive control unit 5 raises or lowers the antenna mast 2 at predetermined height intervals under the control of the control device 6. Note that raising or lowering the antenna mast 2 at a predetermined height interval means raising or lowering the receiving antenna 1 at a predetermined height interval.

  That is, when the measuring device 4 measures the electric field intensity distribution of the radiation source 100, the drive control unit 5 changes the relative position of the reception antenna 1 with respect to the radiation source 100 to each position of a plurality of measurement points.

  Below, the control apparatus 6 which concerns on one Embodiment of this invention is demonstrated concretely.

  As shown in FIG. 1, the control device 6 includes a control unit 61 and an arithmetic processing unit 62. The measuring device 4 and the control unit 61 constitute a “control unit” of the present invention.

  The control unit 61 controls the measurement of the measuring device 4. The control unit 61 controls driving of the drive control unit 5. That is, the control unit 61 controls the measurement of the electric field strength using the receiving antenna 1 and the position control mechanism.

The control unit 61 performs a first operation and a second operation.
The first operation is an operation of measuring the electric field strength distribution by measuring the electric field strength of the radiated disturbance wave received by the receiving antenna 1 at a plurality of measurement points with the measuring device 4 while controlling the position control mechanism. . The electric field strength at the plurality of measurement points measured in the first operation is measured using the Clear / Write function of the measuring device 4.

The second operation is an operation in which the measuring device 4 measures the electric field intensity received by the receiving antenna 1 while changing the relative position of the receiving antenna 1 while controlling the position control mechanism. For example, the electric field strength measured by the measuring device 4 in the second operation is the maximum value of the electric field strength for each frequency, and is measured using the MaxHold function of the measuring device 4.
In the second operation, at least while the relative position of the receiving antenna 1 is changed, the maximum value of the electric field strength for each frequency may be measured by the measuring device 4, and the position control mechanism is controlled. The maximum value of the electric field strength for each frequency may be measured continuously.

  The arithmetic processing unit 62 determines whether or not the electric field strength distribution measured in the first operation is correctly measured using the electric field strengths measured in the first operation and the second operation. For example, the arithmetic processing unit 62 performs measurement in the first operation based on a difference value between the maximum value of the electric field strength measured in the first operation and the maximum value of the electric field strength measured in the second operation. It is determined whether the measured electric field strength distribution is correctly measured. For example, the arithmetic processing unit 62 determines that the electric field intensity distribution measured in the first operation is not correctly measured when the difference value is equal to or greater than a predetermined threshold value (hereinafter referred to as “difference threshold value”). To do.

  FIG. 3 is a block diagram showing a hardware configuration of the control device 6 in FIG. The control device 6 includes a main control unit 6101, an input device 802, an output device 803, a storage device 804, and a bus 806. The bus 806 connects the main control unit 6101, the input device 802, the output device 803, and the storage device 804 to each other.

The main control unit 6101 includes a CPU (central processing unit) and a RAM (random access memory).
The input device 802 is used for inputting information necessary for the operation of the radiated disturbance measuring apparatus A and instructing various operations.
The output device 803 is used to output (including display) various types of information related to the operation of the radiation interference wave measuring apparatus A.

The storage device 804 may be of any form as long as it can store information, but is, for example, a hard disk device or an optical disk device. The storage device 804 records information on a computer-readable recording medium 805 and reproduces information from the recording medium 805.
The recording medium 805 is, for example, a hard disk or an optical disk. The recording medium 805 may be a recording medium that records a program for realizing the control unit 61 and the arithmetic processing unit 62 shown in FIG.

  The main control unit 6101 exhibits the functions of the control unit 61 and the arithmetic processing unit 62 shown in FIG. 1 by executing a program recorded in the recording medium 805 of the storage device 804, for example. Note that the control unit 61 and the arithmetic processing unit 62 illustrated in FIG. 1 are not physically separate elements, and may be realized by software.

(Judgment principle)
Here, a determination principle for determining whether or not the electric field intensity distribution measured in the first operation is correctly measured in the arithmetic processing unit 62 will be described.
As shown in FIG. 4, in the height pattern 301 in the case where the residence time is shorter than the generation period of the intermittent noise, unlike the height pattern 302 in the case where the residence time is long, the electric field strength is lost. For this reason, the electric field strength distribution obtained by the measurement in the first operation may not be measured accurately. Therefore, it is necessary to determine whether or not the electric field strength distribution measured in the first operation is accurately measured.

  Here, whether or not the electric field intensity distribution measured in the first operation is accurately measured may be determined by the presence or absence of intermittent noise. This intermittent noise is a radiation interference wave having a period longer than the residence time in the measuring device 4. Therefore, when there is no intermittent noise, the capture rate of the radiated disturbance wave is 100%, so that the radiated disturbance wave can be captured without omission. Considering the kinematic pair of this proposition, it can be seen that the proposition that intermittent noise exists if the radiation disturbance wave cannot be captured is established.

  For example, when measuring at two different sampling times and the maximum value of the electric field strength is different, it is considered that radiated disturbance is not captured at least one sampling time, so there is intermittent noise from the above theory. It will be.

  Considering that this method is used for determining whether or not intermittent noise is present when measuring the electric field intensity distribution, it is conceivable to perform measurement with a difference in the number of samplings at each measurement point. However, there is a problem that measurement time increases when sampling (sweep) is performed a plurality of times.

To solve this problem, measure the electric field strength distribution with a single frequency sweep, then measure the time waveform at the position where the maximum electric field strength is obtained for each frequency, and determine the presence or absence of intermittent noise in detail. (Hereinafter referred to as “detailed determination”). However, the position of the measurement point at which the maximum electric field strength is obtained differs for each frequency. Therefore, when performing this detailed determination, there is a problem that it takes a long time to change the position of the measurement point, resulting in a long measurement time.
Therefore, in order to shorten the measurement time, it is necessary to compare the maximum values of the electric field strengths with different numbers of samplings without performing both sampling and detailed determination at each measurement point.

  Therefore, the radiation interference wave measuring apparatus A according to the present embodiment performs sampling even while moving from one measurement point to the next measurement point, so that the number of times of sampling can be reduced without performing multiple samplings at each measurement point. Increase. Thus, the radiated disturbance measuring apparatus A compares the maximum value of the sampled electric field intensity at each measurement point with the maximum value of the sampled electric field intensity at each measurement point and even during movement, so that intermittent noise can be detected in a short time. It is possible to determine whether or not the electric field intensity distribution is accurately measured.

  Hereinafter, a series of operations of the position estimation method for the maximum electric field strength in the interference wave measuring apparatus A according to an embodiment of the present invention will be described with reference to FIG.

The operator inputs measurement conditions in the position estimation method for the maximum electric field strength to the control device 6 (step S101).
The measurement conditions are, for example, the frequency band to be measured (measurement frequency band), the measurement range in the height direction (measurement range in the height direction), and the interval between the measurement points set in the measurement range in the height direction (height (Interval), a rotation angle range to be measured, an interval between a plurality of measurement points set within the rotation angle range (angle interval), a difference threshold value, and the like.

  The controller 61 sets the residence time of the measuring device 4 to the residence time input by the operator in step S101 (step S102).

  The control unit 61 causes the Clear / Write function and the MaxHold function of the measuring device 4 to function simultaneously, and starts measuring the electric field strength by the measuring device 4 (step S103).

  The control unit 61 controls driving of the drive control unit 5 and moves the antenna mast 2 to the lower limit value of the height direction measurement range set in step S101. Moreover, the control part 61 controls the drive of the drive control part 5, and rotates the turntable 3 to the lower limit value of the rotation angle range set by step S101 (step S104).

  The control unit 61 obtains the current height of the antenna mast 2 and the current angle of the turntable 3 from the drive control unit 5. Moreover, the control part 61 acquires a measured value (electric field strength) from the Clear / Write function of the measuring instrument 4 (step S105). The control unit 61 stores the acquired height of the current antenna mast 2, the current angle of the turntable 3, and the electric field strength measured by the measuring device 4 in the storage device 804 in association with each other. Here, the electric field strength obtained by the measuring instrument 4 is the electric field strength in the measurement frequency band at the measurement point represented by the current height of the antenna mast 2 and the current angle of the turntable 3.

  The control unit 61 controls driving of the drive control unit 5 and rotates the turntable 3 at the angular interval set in step S101 (step S106).

  The control unit 61 acquires the current angle of the turntable 3 from the drive control unit 5, and outputs the acquired angle of the current turntable 3 to the arithmetic processing unit 62. Then, the arithmetic processing unit 62 determines whether or not the current angle of the turntable 3 acquired from the control unit 61 is the upper limit value of the rotation angle range set in step S101 (step S107).

  If the arithmetic processing unit 62 determines that the current angle of the turntable 3 acquired from the control unit 61 is the upper limit value of the rotation angle range, the arithmetic processing unit 62 proceeds to step S108. On the other hand, when it is determined that the current angle of the turntable 3 acquired from the control unit 61 is not the upper limit value of the rotation angle range, the arithmetic processing unit 62 returns to Step S105.

  The controller 61 controls the drive of the drive controller 5 and raises the antenna mast 2 at the height interval set in step S101 (step S108).

  The control unit 61 acquires the current height of the antenna mast 2 from the drive control unit 5, and outputs the acquired height of the current antenna mast 2 to the arithmetic processing unit 62. Then, the arithmetic processing unit 62 determines whether or not the current height of the antenna mast 2 acquired from the control unit 61 is the upper limit value of the height direction measurement range set in step S101 (step 109).

  If the arithmetic processing unit 62 determines that the current height of the antenna mast 2 acquired from the control unit 61 is the upper limit value of the height direction measurement range, the arithmetic processing unit 62 proceeds to step S110. On the other hand, if the arithmetic processing unit 62 determines that the current height of the antenna mast 2 acquired from the control unit 61 is not the upper limit value of the height direction measurement range, the processing unit 62 returns to step S105.

  As described above, when the processing from step S101 to step S109 is completed, the frequency spectrum of the electric field strength is measured by the measuring device 4 at a plurality of measurement points. That is, in order to search for a position where the maximum electric field strength can be obtained, the radiation interference measuring apparatus A changes the height of the receiving antenna 1 and the angle of the specimen (radiation source 100) as shown in FIG. The electric field strength distribution 400 surrounding the body is measured.

  Moreover, the measuring device 4 holds the maximum value of the electric field strength for each frequency among the electric field strengths measured between Step S103 and Step S109 using the MaxHold function. Therefore, the control unit 61 acquires the maximum value of the electric field strength for each frequency measured by the measuring instrument 4 using the MaxHold function from the measuring instrument 4 and stores it in the storage device 804 (step S110).

  The operator selects a frequency (hereinafter referred to as “determination frequency”) for determining whether or not the electric field intensity distribution 400 has been correctly measured (step S111). For subsequent flows, processing is performed at this determination frequency. The determination frequency does not indicate a single frequency but indicates a predetermined frequency band including the determination frequency.

  The arithmetic processing unit 62 calculates the maximum value of the electric field strength distribution measured in steps S103 to S109. Then, the arithmetic processing unit 62 calculates a difference value between the maximum value of the electric field strength distribution and the maximum value of the electric field strength held by the MaxHold function (step S112).

  The arithmetic processing unit 62 determines whether or not the difference value calculated in step S112 exceeds the difference threshold set in S101 (step S113). If the arithmetic processing unit 62 determines that the calculated difference value does not exceed the difference threshold value, the arithmetic processing unit 62 determines that the electric field intensity distribution measured from step S103 to step S109 is correctly measured (step S114). And the control part 61 displays the information which shows that the electric field strength distribution has been measured correctly on the display screen (not shown) of the control apparatus 6.

  If it is determined that the calculated difference value exceeds the difference threshold value, the arithmetic processing unit 62 determines that the electric field intensity distribution measured in steps S103 to S109 cannot be measured correctly (step S115). And the control part 61 displays the information which shows that electric field strength distribution is not correctly measured on the display screen (not shown) of the control apparatus 6. FIG.

  In addition, when performing the said determination with a some determination frequency, what is necessary is just to repeat step S111 to step S115.

(Verification experiment)
Hereinafter, an experiment performed for verifying the validity of the determination principle in the radiation interference wave measuring apparatus A according to the embodiment of the present invention will be described with reference to FIGS.

FIG. 7 is an explanatory diagram for explaining a verification experiment method according to an embodiment of the present invention.
A measurement target radiation source 500 used in the verification experiment is obtained by connecting a signal generator 502 to a biconical antenna 501. The biconical antenna 501 is disposed at a height of 1.0 m. The signal generator 502 outputs a 700 MHz sine wave signal (hereinafter referred to as a “sine wave signal”) to the biconical antenna 501 every 90 ms.
The receiving antenna 1 is installed at a position 3 m away from the biconical antenna 501.

  The electric field strength distribution was measured by changing the residence time of the measuring device 4 under the experimental conditions as described above. In this verification experiment, the dwell time is set to 10 ms, 50 ms, which is shorter than the generation period of the sine wave signal output from the signal generator 502, 90 ms, which is the same as the generation period of the sine wave signal, and the generation period of the sine wave signal. The electric field intensity distribution formed on the surface surrounding the radiation source 500 was measured by changing the pattern into four sufficiently long 200 ms patterns.

  Here, one of the objects of the present invention is to determine only the presence or absence of some of the intermittent noise in the intermittent noise by the above-described determination method used in the radiation interference wave measuring apparatus A, and exclude it from the detailed determination performed thereafter. It is to be. Therefore, the radiation interference wave measuring apparatus A always determines the case where the electric field intensity distribution is accurately measured as an example of the case where the determination of the above determination method is performed accurately when the electric field intensity distribution is not accurately measured. It is only necessary to confirm that is performed accurately.

  FIG. 8 is a contour map showing the electric field strength measured in the verification experiment according to the embodiment of the present invention. The electric field strength distribution when the residence time is 10 ms (FIG. 8A) and the electric field strength distribution when the residence time is 50 ms (FIG. 8B) are the electric field strength distribution when the residence time is 200 ms (FIG. 8B). It can be seen that the electric field strength distribution is disturbed compared to d)) and is not accurately measured. On the other hand, the electric field strength distribution with a residence time of 90 ms (FIG. 8C) shows the same distribution as the electric field strength distribution with a residence time of 200 ms (FIG. 8D) and is measured accurately. I understand.

In this verification experiment, assuming that the difference threshold is +/− 1 dB, the difference between the maximum value of the electric field intensity distribution measured by the Clear / Write function and the electric field intensity measured by the MaxHold function at each residence time is calculated. The time is -1.25 dB at 10 ms, and it is determined that the electric field strength is not accurately measured when the residence time is 10 ms.
On the other hand, the maximum value of the field strength distribution measured by the Clear / Write function and the field strength measured by the MaxHold function for the residence times of 90 ms and 200 ms determined that the field strength distribution is accurately measured from the above results. The dwell time is 0.00 dB at 90 ms and the dwell time is 0.03 dB at 200 ms, and the electric field strength is accurately measured even in the determination method of the radiated disturbance apparatus A according to the embodiment of the present invention. It is understood that it was judged.

  As described above, the radiation interference wave measuring apparatus A according to the present embodiment measures the field intensity distribution by measuring the field intensity of the radiation interference wave received by the reception antenna 1 at the plurality of measurement points. The operation and the second operation of measuring the electric field intensity received by the receiving antenna 1 while changing the relative position of the receiving antenna 1 are executed. And the radiation disturbance wave measuring apparatus A determines whether the electric field strength distribution was correctly measured using the electric field strength measured by the first operation and the second operation. Thereby, the radiation interference wave measuring apparatus A can efficiently determine whether or not the electric field intensity distribution is accurately measured.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

A Radiated disturbance measuring device 1 Receiving antenna 2 Antenna mast 3 Turntable 4 Measuring instrument 5 Drive controller 6 Controller 61 Controller 62 Arithmetic processor 100 Radiation source

Claims (3)

A radiation interference wave measuring device for determining whether or not an electric field intensity distribution formed on a surface surrounding a radiation interference wave radiation source is correctly measured,
An antenna for receiving the radiated disturbance;
A position control mechanism that changes a relative position of the antenna with respect to the radiation source to positions of a plurality of measurement points on a surface surrounding the radiation source;
A first operation of measuring the electric field strength distribution by measuring the electric field strength of the radiation interference wave received by the antenna at the plurality of measurement points, and changing the relative position of the antenna; A second operation for measuring the electric field strength received at
An arithmetic processing unit that determines whether or not the electric field strength distribution is correctly measured using the electric field strength measured in the first operation and the second operation;
A radiation interference wave measuring apparatus comprising:   When the difference value between the maximum value of the electric field intensity measured in the first operation and the maximum value of the electric field intensity measured in the second operation is equal to or greater than a predetermined threshold, 2. The radiation interference wave measuring apparatus according to claim 1, wherein the electric field intensity distribution measured in the first operation is determined not to be correctly measured. A determination method of a radiation interference wave measuring apparatus, comprising an antenna for receiving a radiation interference wave, and determining whether or not an electric field intensity distribution formed on a surface surrounding a radiation source of the radiation interference wave is correctly measured,
A position control step of changing a relative position of the antenna with respect to the radiation source to positions of a plurality of measurement points on a surface surrounding the radiation source;
A first operation step of measuring the electric field strength distribution by measuring the electric field strength of the radiation disturbance wave received by the antenna at the plurality of measurement points;
A second operational step of measuring the field strength received at the antenna while changing the relative position of the antenna;
An arithmetic processing step for determining whether or not the electric field strength distribution is correctly measured using the electric field strength measured in the first operation step and the second operation step;
A determination method including