KR101649514B1 - Electromagnetic compatibility testing apparatus - Google Patents
Electromagnetic compatibility testing apparatus Download PDFInfo
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- KR101649514B1 KR101649514B1 KR1020150056605A KR20150056605A KR101649514B1 KR 101649514 B1 KR101649514 B1 KR 101649514B1 KR 1020150056605 A KR1020150056605 A KR 1020150056605A KR 20150056605 A KR20150056605 A KR 20150056605A KR 101649514 B1 KR101649514 B1 KR 101649514B1
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- antenna
- radio wave
- array antenna
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0878—Sensors; antennas; probes; detectors
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to an electromagnetic compatibility testing apparatus, and more particularly, to a testing apparatus for testing electromagnetic compatibility of a test object, comprising: an array antenna including at least two or more unit antennas arranged; A radiation controller for controlling a phase of each of the unit antennas so that a test radio wave concentrated at a predetermined point is emitted from the array antenna; And a monitoring unit for monitoring a reaction of the test subject due to the test radio wave. Accordingly, the size and weight of the antenna for transmitting radio waves can be greatly reduced, and electric field measurement through the field probe is not performed, so that the test can be performed economically.
Description
BACKGROUND OF THE
Electromagnetic Compatibility (EMC) refers to a state in which systems, equipment, and components operate normally in an electromagnetic environment. It minimizes unnecessary electromagnetic radiation from electrical and electronic equipment and prevents interference from external electromagnetic environment. It is necessary to have electromagnetic wave immunity to operate normally.
As various electric and electronic equipments are miniaturized, many low-power and high-speed devices are used, and these devices are likely to cause serious trouble due to electromagnetic waves, and thus electromagnetic compatibility is becoming increasingly important. Reflecting this situation, electromagnetic compatibility tests have been carried out in a variety of fields ranging from semiconductors, home electronic devices to automobiles, aircraft, medical, communication, and military equipment, and various standards and specifications have been prepared for them.
A test to evaluate electromagnetic compatibility is a radiated emission test that measures the magnitude of interferences radiated from electronic equipment to the outside and the immunity to performance that is required when electronic equipment is exposed to high field strength environments There is a radiated susceptibility test.
Among them, the radiation immunity test was conducted to prevent radio interference caused by the strong electric field generated during the test, to form a uniform electric field in the area where the equipment under test (EUT) is placed, It is performed in the anechoic chamber, radiates the generated signal to the EUT through the antenna, and monitors the operation state of the EUT by the signal to evaluate the immunity performance.
As described above, since a strong electric field is generated in the radiation immunity test, a high output signal source such as a vacuum tube and a high gain antenna are required. This increases the cost of implementing the test apparatus and increases the weight and size of the antenna. Particularly, since medical, automobile, and military equipment require a stronger electric field, the size of the antenna also increases in proportion to this, so that the above problems are more conspicuous. On the other hand, even when a low-power signal source is used, a large reflector for focusing the signal needs to be separately provided.
In addition, since it is not possible to predict the field strength in the near field, field strength measurement is performed through a plurality of field probes in the conventional radiation immunity test. As a result, there is a problem that time and cost are also required to measure the electric field intensity.
Therefore, it is necessary to design an advanced electromagnetic compatibility testing apparatus which can reduce the time and cost required for the test and the size of the equipment used in the test while ensuring the reliability of the conventional radiation immunity test.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide an electromagnetic compatibility testing apparatus which can reduce the weight and volume of a test equipment while maintaining reliability as a result of a conventional radiation immunity test, .
The above object is achieved by a testing apparatus for testing electromagnetic compatibility of a test object according to an aspect of the present invention, comprising: an array antenna including at least two or more unit antennas arranged; A radiation controller for controlling a phase of each of the unit antennas so that a test radio wave concentrated at a predetermined point is emitted from the array antenna; And a monitoring unit for monitoring a response of the test object due to the test radio wave.
The radiation controller may calculate an input phase to be fed to each of the unit antennas on the basis of a distance between each of the unit antennas and the predetermined point. In this case, the radiation controller may control the unit antennas, So that the input phase can be calculated.
Also, the radiation control unit may control the beam width of the test radio wave in consideration of the size of the test object and the required electric field intensity, and may perform beam steering through the phase adjustment of the unit antennas, The test may be carried out on the test device.
In addition, the emission control unit may control the sequentially changing intensity of the test radio wave and the frequency band so that the test is performed in various test environments and conditions.
On the other hand, based on at least any one of the radiation pattern of the unit antenna, the intensity of the power inputted to the unit antenna, and the distance between the unit antenna and the unit area of the plane including the point, and an electric field calculation unit for calculating an array factor, calculating an electric field strength based on the array coefficient, and feeding back the information about the radio wave for test to the emission control unit.
The apparatus may further include a rotation table for rotating the test object in accordance with the monitoring progress of the monitoring unit, in order to increase the convenience of the test. For example, a rail may be extended from the array antenna along one direction, and the rotary table may be configured to be movable on the rail so that the distance between the test object and the array antenna can be adjusted.
As described above, according to the present invention, the size and weight of the antenna for transmitting radio waves can be greatly reduced, and electric field measurement through the field probe is not performed, so that the test can be performed economically.
Further, according to the present invention, antenna height and angle adjustment through conventional mechanical mechanisms can be achieved through electronic beam steering, thereby enhancing test convenience.
1 is a schematic configuration diagram of an electromagnetic compatibility testing apparatus according to an embodiment of the present invention;
FIG. 2 is a reference diagram for explaining an example of calculating an antenna array coefficient; FIG. And
3 is a graph showing a power density variation according to a distance between an array antenna and a target point.
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
1 is a schematic configuration diagram of an electromagnetic compatibility testing apparatus according to an embodiment of the present invention. 1, an electromagnetic compatibility testing apparatus according to an embodiment of the present invention includes an
The
The
The
The
In this manner, the
An example in which the
Assuming that the
The
The
Since the electromagnetic compatibility test needs to be performed at various points and in various directions according to the characteristics and usage of the test object (EUT), the
Electromagnetic compatibility test should be performed in the uniform electric field area, and it is necessary to grasp current electric field intensity in the test process. However, according to the embodiment of the present invention, the field intensity is measured using a plurality of field probes, including the electric
The
Fig. 2 is a reference diagram for explaining an example in which array coefficients are calculated through the electric
In the above formula,
The intensity of the power input to eachThe electric
The
The
Meanwhile, the electromagnetic compatibility testing apparatus according to the embodiment of the present invention may further include a turn table 50 for rotating the test object (EUT). It is necessary to scan the entire surface according to the test object EUT. Therefore, the test object EUT is automatically or remotely controlled in accordance with the test progress of the
3 is a graph showing a change in power density according to a distance d between the
In consideration of this, the rotary table 50 can be moved not only in the rotation direction but also in the horizontal direction, so that the horizontal distance between the
As described above, in the electromagnetic compatibility testing apparatus according to the present invention, by adopting the
Although some embodiments of the present invention have been described above, those skilled in the art will appreciate that various modifications may be made without departing from the spirit of the present invention.
Therefore, it is to be understood that the embodiments of the present invention are by way of example only and that the technical spirit of the present invention is defined from the claims, and that the scope of the present invention is applied to equivalents.
10: array antenna 20: radiation control unit
30: electric field calculation unit 40: monitoring unit
50: Rotating table
Claims (9)
An array antenna in which at least two or more unit antennas are arranged;
A radiation controller for controlling a phase of each of the unit antennas so that a test radio wave concentrated at a predetermined point is emitted from the array antenna;
A monitoring unit for monitoring a reaction of the test subject due to the test radio wave; And
And an array coefficient of the array antenna based on at least any one of a radiation pattern of the unit antenna, an intensity of power input to the unit antenna, and a distance between the unit antenna and a unit area of a plane including the point and an electric field calculation unit for calculating the electric field intensity based on the array coefficient and feeding back the information about the test radio wave to the radiation control unit,
Wherein the radiation controller controls at least one of intensity, beam direction, and beam width of a test radio wave to be radiated by controlling the array antenna based on the feedback information.
Wherein the radiation control unit calculates an input phase to be fed to each unit antenna based on a distance between each unit antenna and the predetermined point.
And the radiation control unit calculates the input phase by compensating for a waveform delay corresponding to a difference in distance between the unit antenna and the predetermined point.
Wherein the radiation control unit controls the beam width of the test radio wave in consideration of the size of the test object and the required electric field intensity.
And the radiation control unit performs beam steering through the phase adjustment of each of the unit antennas.
And the radiation control unit controls the intensity and the frequency band of the test radio wave sequentially.
And a rotation table for rotating the test object in accordance with the monitoring progress of the monitoring unit.
Further comprising a rail extending along one direction from the array antenna,
Wherein the rotary table is movably provided on the rail so that a distance between the test object and the array antenna can be adjusted.
Priority Applications (1)
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KR1020150056605A KR101649514B1 (en) | 2015-04-22 | 2015-04-22 | Electromagnetic compatibility testing apparatus |
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KR1020150056605A KR101649514B1 (en) | 2015-04-22 | 2015-04-22 | Electromagnetic compatibility testing apparatus |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101946720B1 (en) * | 2017-08-08 | 2019-02-11 | 한국과학기술원 | Full-Field MAS Scanning System and Method |
KR101969146B1 (en) * | 2018-09-20 | 2019-04-16 | 국방과학연구소 | Apparatus and method for supporting design of electromagnetic wave absorber |
KR102207103B1 (en) * | 2020-07-22 | 2021-01-22 | 김대진 | Apparatus for testing Electromagnetic Susceptibility |
CN112904091A (en) * | 2021-01-13 | 2021-06-04 | 成都四威功率电子科技有限公司 | PID-based field intensity radiation automatic test system control method |
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JPH1164487A (en) * | 1997-08-26 | 1999-03-05 | Nippon Denki Denpa Kiki Eng Kk | Monitoring system for phased array antenna |
JP2007049691A (en) * | 2005-07-13 | 2007-02-22 | Murata Mfg Co Ltd | Antenna module and radio apparatus |
KR101337343B1 (en) * | 2012-12-18 | 2013-12-06 | 주식회사 현대케피코 | Method for estimating field uniformity for electromagnetic susceptibility test |
JP5678854B2 (en) * | 2011-09-28 | 2015-03-04 | 株式会社デンソー | Electromagnetic test equipment |
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2015
- 2015-04-22 KR KR1020150056605A patent/KR101649514B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1164487A (en) * | 1997-08-26 | 1999-03-05 | Nippon Denki Denpa Kiki Eng Kk | Monitoring system for phased array antenna |
JP2007049691A (en) * | 2005-07-13 | 2007-02-22 | Murata Mfg Co Ltd | Antenna module and radio apparatus |
JP5678854B2 (en) * | 2011-09-28 | 2015-03-04 | 株式会社デンソー | Electromagnetic test equipment |
KR101337343B1 (en) * | 2012-12-18 | 2013-12-06 | 주식회사 현대케피코 | Method for estimating field uniformity for electromagnetic susceptibility test |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101946720B1 (en) * | 2017-08-08 | 2019-02-11 | 한국과학기술원 | Full-Field MAS Scanning System and Method |
KR101969146B1 (en) * | 2018-09-20 | 2019-04-16 | 국방과학연구소 | Apparatus and method for supporting design of electromagnetic wave absorber |
KR102207103B1 (en) * | 2020-07-22 | 2021-01-22 | 김대진 | Apparatus for testing Electromagnetic Susceptibility |
CN112904091A (en) * | 2021-01-13 | 2021-06-04 | 成都四威功率电子科技有限公司 | PID-based field intensity radiation automatic test system control method |
CN112904091B (en) * | 2021-01-13 | 2023-11-21 | 成都四威功率电子科技有限公司 | Control method of field intensity radiation automatic test system based on PID |
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