JP2006220511A - Immunity test apparatus against radiation of electromagnetic field - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform an immunity test against radiation of electromagnetic field in a small scale. <P>SOLUTION: The immunity test apparatus 10 against the radiation of electromagnetic field comprises: the bag 11 of conductive fabric instead of a radio anechoic chamber or a shield room; the antenna 12 provided in the bag 11, and the antenna feeder 13 as a feeding path of a high frequency signal to the antenna 12. The immunity test against the radiation of the electromagnetic field for the electronic equipment 20 to be tested is arranged in the bag 11 which is capable of performing the test in the smaller scale than before. The test apparatus 10 is provided with a blow pipe 14 as a supply path of air to the inside of the bag 11, therefore, by releasing the air in the bag 11 through the blow pipe 14, the whole of the apparatus can be folded and accommodated in a small storage space. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radiated electromagnetic field immunity test apparatus for evaluating whether or not an electronic device can maintain its function without being affected by externally irradiated radio waves.

  Conventionally, a test system for immunity of electronic devices against radiated electromagnetic fields consists of an antenna that radiates radio waves, a signal generator, and an anechoic chamber or shielded room to prevent the electromagnetic field generated during the test from leaking outside. (See, for example, Patent Document 1 below).

  There is also an international standard IEC 6100-4-3 as a radiated electromagnetic field immunity test method. In this standard, a uniform electric field is generated in an anechoic chamber, and an electronic device to be measured is installed in the anechoic chamber to evaluate immunity. Electric field strength is used as the immunity level. In addition, the international standard IEC 61000-4-21 is a test method called a reflection box method, which defines a statistical immunity evaluation method by arranging metal blades or the like in a reflection space such as a shield room.

Aside from such international standards, a radiation immunity test in an anechoic chamber 90 as shown in FIG. In this test system, a dipole antenna 91 connected to a transmission signal simulator 94 via an antenna feeder 93 is used as a radio wave irradiation source. When the dipole antenna 91 is brought close to the electronic device to be measured 92 from a distance, and some influence occurs on the electronic device to be measured 92, the distance between the dipole antenna 91 and the electronic device to be measured 92 and the antenna input are recorded as immunity levels. . This method is effective, for example, when performing a practical evaluation such as how many centimeters the mobile phone approaches the electronic device to be measured, which affects the electronic device to be measured.
Japanese Patent Laid-Open No. 10-38940

  However, in the conventional radiated electromagnetic field immunity test, the test must be performed in an anechoic chamber or shielded room in order to prevent the electromagnetic field caused by the irradiated radio waves from leaking outside and interfering with other wireless communications. There was a need to do. For this reason, there was a problem that the scale of the test system would be very large.

  Therefore, an object of the present invention is to provide a radiation electromagnetic field immunity test apparatus capable of performing a radiation electromagnetic field immunity test on a small scale in order to solve the above-described problems.

  In order to achieve the above object, a radiated electromagnetic field immunity test apparatus according to the present invention includes a bag made of conductive cloth, an antenna inserted into the bag, and an antenna serving as a high-frequency signal supply path to the antenna. A feeder is provided.

  As described above, the radiated electromagnetic field immunity test apparatus according to the present invention uses a conductive cloth bag instead of a conventional anechoic chamber or shield room, an antenna inserted in the bag, and a high frequency to the antenna. Since the antenna feeder serving as the signal supply path is provided, the radiated electromagnetic field immunity test for the electronic device to be measured disposed inside the bag can be performed on a smaller scale than in the past.

  The radiated electromagnetic field immunity test apparatus according to the present invention preferably further includes a blower pipe serving as an air supply path to the inside of the bag. In this case, it is possible to fold the entire apparatus small by removing the air inside the bag through the blower pipe, and the apparatus of the present invention can be stored in a small storage space.

  In the radiated electromagnetic field immunity test apparatus according to the present invention, it is desirable that the conductive fabric of the bag is transparent. In this case, there is an effect that the operating state of the electronic device to be measured can be visually confirmed.

  Further, in the radiated electromagnetic field immunity test apparatus according to the present invention, the antenna is a connection path between the antenna element and the antenna feeder, and includes a coaxial line provided through a predetermined opening of the bag. In the section, the coaxial line is preferably provided so as to be in electrical contact with the conductive fabric of the bag through the conductive gasket over the entire opening. In this case, since the opening can be electrically shielded, the leakage of the electromagnetic field inside the bag can be made extremely small.

  Further, in the radiated electromagnetic field immunity test apparatus according to the present invention, the blower pipe is configured to include a conductive pipe provided through a predetermined opening of the bag, and in the opening, the conductive pipe is It is desirable that the entire opening be provided so as to be in electrical contact with the conductive fabric of the bag through a conductive gasket, and a conductive honeycomb is inserted inside the conductive pipe. In this case, since the opening can be electrically shielded, the leakage of the electromagnetic field inside the bag can be made extremely small.

  In the radiated electromagnetic field immunity test apparatus according to the present invention, it is desirable that at least one metal fastener be provided on the surface of the bag. In this case, the setting of the electronic device to be measured such that the electronic device to be measured is taken in and out of the bag through at least one metal fastener, or pipes are inserted into the electronic device to be measured arranged in the bag. Can be easily performed. In addition, since the electronic device to be measured can be easily connected to an external device via a pipe or the like, an actual operation state can be easily reproduced, and a highly reliable immunity test can be performed.

  Further, the radiated electromagnetic field immunity test apparatus according to the present invention is provided in a conductive casing electrically connected to the bag, a low-pass filter for power supply provided in the casing, and in the casing. A low-pass filter for the signal line, a power connector for connecting the power line supplied from the outside via the power low-pass filter to the electronic device to be measured and the power low-pass filter, and the device to be measured It is desirable to further include a signal connector for connecting the signal line connected to the electronic device and the signal line low-pass filter. In this case, since the electromagnetic field inside the bag of conductive fabric can be prevented from leaking outside through the power line or signal line, the reliability of reproducing the actual operation state with the leakage electromagnetic field kept small High immunity test is possible.

  In addition, in the radiated electromagnetic field immunity test apparatus according to the present invention, it is desirable that a radio wave absorber is attached to a part or all of the inner surface of the bag. In this case, the radio wave absorber attached to the inner surface of the bag suppresses the reflection of the electromagnetic field on the inner side of the bag, so that the immunity can be evaluated in a state where the electronic device to be measured is close to the actual installation environment.

  In addition, the radiated electromagnetic field immunity test apparatus according to the present invention preferably includes a laser distance measurement sensor attached on a coaxial line between the antenna element and the antenna feeder in the antenna. In this case, since the distance between the antenna and the electronic device to be measured can be immediately detected by the laser distance measuring sensor, the time required for the immunity test can be greatly shortened.

  In addition, the radiated electromagnetic field immunity test apparatus according to the present invention further includes one or more through pipes that are connected to an electronic device to be measured disposed inside the bag and provided through a predetermined opening of the bag, The penetration portion of the opening in the penetration pipe is constituted by a conductive pipe, and in the opening, the conductive pipe is in electrical contact with the conductive cloth of the bag through the conductive gasket throughout the opening. It is desirable that a conductive honeycomb is inserted inside the conductive pipe. In this case, even with a through pipe having a large diameter, liquid material or the like can be supplied to or discharged from the electronic device to be measured via the through pipe in a state where the electromagnetic field leaking outside the bag is kept small.

  The radiated electromagnetic field immunity test apparatus according to the present invention uses a conductive cloth bag instead of a conventional anechoic chamber or shield room, an antenna inserted in the bag, and a high-frequency signal supply to the antenna Since the antenna feeder serving as the path is provided, the radiated electromagnetic field immunity test for the electronic device to be measured arranged in the bag can be performed on a smaller scale than in the past.

  Hereinafter, various embodiments of the radiated electromagnetic field immunity test apparatus according to the present invention will be described in order.

[First Embodiment]
First, a first embodiment corresponding to claims 1 to 3 of the claims will be described with reference to FIG. The radiated electromagnetic field immunity test apparatus 10 according to the first embodiment shown in FIG. 2 includes a bag 11 made of conductive cloth, a dipole antenna 12 inserted into the bag 11 to generate an electromagnetic field, and a transmission An antenna feeder 13 serving as a high-frequency signal supply path from the signal simulator 16 to the dipole antenna 12 and a blower pipe 14 serving as an air supply path from the blower 15 to the inside of the bag 11 are provided.

  The conductive fabric of the bag 11 is made of conductive fibers, and the bag 11 is manufactured by sewing the conductive fabric into a bag shape. Conductive fibers are also used in this sewing. By using the bag 11 made of such a conductive fabric, the electromagnetic field from the inside of the bag 11 is significantly attenuated outside the bag 11. For this reason, interference with the wireless communication system around the bag 11 due to the electromagnetic field radiated from the dipole antenna 12 inserted into the bag 11 is prevented.

  When a test is performed using the radiated electromagnetic field immunity test apparatus 10, the electronic device to be measured 20 is disposed inside the bag 11. The blower pipe 14 is connected to a predetermined opening provided in the bag 11, and air is sent from the blower 15 into the bag 11 through the blower pipe 14 in order to maintain the outer shape of the bag 11.

  Further, the conductive fabric of the bag 11 is optically transparent. The light transmittance of the conductive fabric can be realized by reducing the density of the conductive fibers.

  A signal supplied to the dipole antenna 12 reaches the dipole antenna 12 from the transmission signal simulator 16 via the antenna feeder 13. In general, the radiated electromagnetic field immunity of an electronic device largely depends on the frequency and modulation method of the transmission signal.For example, in order to evaluate the immunity of an electronic device due to radio waves emitted by a mobile phone, a transmission signal similar to that of a mobile phone is used. It is necessary to use it. For this reason, the transmission signal simulator 16 generates a signal similar to the transmission signal to be tested. Such a transmission signal simulator 16 includes, for example, an arbitrary waveform generator, a microwave signal generator, and a power amplifier. It can be easily configured by using it.

  In the immunity test using the radiated electromagnetic field immunity test apparatus 10, the examiner slowly brings the dipole antenna 12 close to the measured electronic device 20 and observes the operation of the measured electronic device 20. As the immunity level, the electric field strength when a malfunction occurs in the electronic device under measurement 20 is used. Further, the distance between the dipole antenna 12 and the electronic device 20 to be measured and the antenna input power are also used as the immunity level.

  The radiated electromagnetic field immunity test apparatus 10 according to the first embodiment as described above uses a conductive fabric bag 11 instead of a conventionally used anechoic chamber or shield room, and the measured electron placed inside the bag 11. The radiated electromagnetic field immunity test for the device 20 can be performed on a smaller scale than in the past.

  Further, by removing the air inside the bag 11 through the blower pipe 14, the entire apparatus can be folded small and can be stored in a small storage space.

  Furthermore, since the conductive fabric of the bag 11 is transparent, the examiner can easily confirm the operating state of the electronic device 20 to be measured disposed inside the bag 11 by visual observation.

  In addition, as a structure of the radiated electromagnetic field immunity test apparatus 10, it is not an essential requirement to provide the ventilation pipe 14 and the conductive cloth of the bag 11 is transparent. A bag 11, a dipole antenna 12 that is inserted into the bag 11 and generates an electromagnetic field inside the bag 11, and an antenna feeder 13 that serves as a high-frequency signal supply path from the transmission signal simulator 16 to the dipole antenna 12. It only has to be.

[Second Embodiment]
Next, a second embodiment corresponding to claims 4 and 5 of the claims will be described with reference to FIGS.

  In FIG. 3, the enlarged view of the part which inserts the dipole antenna 12 in the bag 11 of conductive cloth is shown. As shown in the figure, the dipole antenna 12 includes an antenna element 12A, a balance / unbalance converter (balun) 12B, a coaxial line 12C, and a coaxial connector 12D. In order to insert the dipole antenna 12 into the conductive fabric bag 11, it is necessary to provide an opening in a part of the bag 11. The diameter of the opening is set to be sufficiently smaller than the wavelength of the electromagnetic field. The

  At the opening, the coaxial line 12 </ b> C has a structure in which the conductive gasket 21 is wound around, covers the protruding portion 11 </ b> A of the bag 11 from the outside, and is tightened by the fastener 22 from the outside. That is, the coaxial line 12C is provided so as to be in electrical contact with the overhanging portion 11A through the conductive gasket 21 over the entire opening. With such a structure, since the opening can be electrically shielded, the leakage of the electromagnetic field inside the bag 11 can be made extremely small.

  FIG. 4 shows an enlarged view of a portion where the blower pipe 14 is inserted into the conductive fabric bag 11. As shown in the figure, the blower pipe 14 includes a conductive pipe 14 </ b> A provided through the opening of the bag 11. In the opening, the conductive pipe 14A has a structure in which the conductive gasket 23 is wound around, covers the protruding portion 11B of the bag 11 from the outside, and is tightened by the fastener 24 from the outside. That is, the conductive pipe 14A is provided so as to be in electrical contact with the overhanging portion 11B through the conductive gasket 23 over the entire opening. Further, a conductive honeycomb 25 is provided inside the conductive pipe 14A to shield the electromagnetic field. With such a structure, since the opening can be electrically shielded, the leakage of the electromagnetic field inside the bag 11 can be made extremely small.

[Third Embodiment]
Next, a third embodiment corresponding to claim 6 of the claims will be described with reference to FIG.

  As shown in FIG. 5, the radiated electromagnetic field immunity test apparatus 10 according to the third embodiment includes three metal fasteners (a first metal fastener 31, a second metal fastener 32, and a third metal on the surface of the bag 11. A fastener 33) is additionally provided. Among these, the first metal fastener 31 is provided to put the electronic device 20 to be measured into or out of the bag 11. The second metal fastener 32 and the third metal fastener 33 are provided for passing the pipes 30 connected to the electronic device 20 to be measured from the outside of the bag 11.

  Here, a good shielding characteristic can be obtained by using a metal fastener as the fastener. Further, the diameter of the hole through which the pipes 30 pass in the second metal fastener 32 and the third metal fastener 33 is set to be sufficiently shorter than the wavelength of the radiated electromagnetic field inside the bag 11. For this reason, the shielding effect by the said hole is maintainable.

  Thus, by providing the three metal fasteners 31 to 33 on the surface of the bag 11, the electronic device 20 to be measured can be taken in and out of the bag 11, or the electronic device 20 to be measured disposed inside the bag 11. On the other hand, setting of the electronic device 20 to be measured such as insertion of the pipes 30 can be easily performed. Further, since the electronic device 20 to be measured can be easily connected to an external device via the pipes 30, an actual operation state can be easily reproduced, and a highly reliable immunity test can be performed.

  In addition, although the example which provided three metal fasteners was demonstrated in FIG. 5, sufficient effect can be acquired only by providing at least one metal fastener. For example, when two metal fasteners are provided, one metal fastener is used for inserting / removing an electronic device to / from the bag and inserting a pipe, and the other metal fastener is used for inserting a pipe. Thus, the same effect as that of the above embodiment can be obtained. Also, when passing through one pipe connecting the electronic device to be measured and the device outside the bag, one metal fastener is provided, and the metal fastener is put into and out of the bag inside the bag. The effect similar to the above-mentioned embodiment can be acquired by using both for use and for pipe insertion.

[Fourth Embodiment]
Next, a fourth embodiment corresponding to claim 7 of the claims will be described with reference to FIG.

  As shown in FIG. 6, the radiated electromagnetic field immunity test apparatus 10 according to the fourth embodiment is provided with a conductive casing 40 for connecting a power line and a signal line to the electronic device 20 to be measured in the bag 11. The housing 40 is electrically connected to the bag 11. In the housing 40, the power supply low-pass filter 42 connected to the power supply line 43, the signal line low-pass filter 45 connected to the signal line 46, and the power supplied from the outside via the power supply low-pass filter 42. A power supply connector 41 for connecting the power supply line 47 and the power supply low-pass filter 42 to the electronic device under test 20, a signal line 48 connected to the electronic device under measurement 20 and a low-pass filter for the signal line A signal connector 44 is provided for connecting to the connector 45. The cutoff frequencies of the power supply low-pass filter 42 and the signal line low-pass filter 45 are set lower than the lowest frequency of the radiated electromagnetic field to be tested. For example, if the lowest frequency of the radiated electromagnetic field to be tested is 30 MHz, the cutoff frequencies of the power supply low-pass filter 42 and the signal line low-pass filter 45 are both set to 30 MHz or less.

  With such a configuration, the electromagnetic field inside the bag 11 can be prevented from leaking to the outside through the power line 43 or the signal line 46, so that the reliability of reproducing the actual operation state with the leakage electromagnetic field suppressed to a small level. High immunity test can be performed.

[Fifth Embodiment]
Next, a fifth embodiment corresponding to claim 8 of the claims will be described with reference to FIG.

  As shown in FIG. 7, in the radiated electromagnetic field immunity test apparatus 10 of the fifth embodiment, a radio wave absorber 50 is attached to a part of the inner surface of the bag 11.

  Assuming a state in which the radio wave absorber 50 is not attached, in the frequency band to be tested, the reflection coefficient of the electromagnetic field by the conductive fabric of the bag 11 is close to 1, and the electromagnetic field incident on the surface of the conductive fabric is Reflects well. Therefore, the electronic device 20 to be measured is not only irradiated with the electromagnetic field radiated from the dipole antenna 12 but also irradiated with the electromagnetic field reflected by the inner surface of the bag 11 of the conductive fabric. As an immunity evaluation, it becomes an excessive evaluation. However, in an electronic device to be measured placed in an actual environment, an electromagnetic field component directly irradiated from an antenna is dominant.

  Therefore, the radio wave absorber 50 can suppress the reflection of the electromagnetic field on the inner surface of the bag 11 by sticking the radio wave absorber 50 to a part of the inner surface of the bag 11 as shown in FIG. For this reason, immunity can be evaluated in a state where the measured electronic device 20 is close to the actual installation environment.

  Note that the radio wave absorber 50 may be attached not over a part of the inner surface of the bag 11 but over the entire inner surface.

[Sixth Embodiment]
Next, a sixth embodiment corresponding to claim 9 of the claims will be described with reference to FIG.

  As shown in FIG. 8, the radiated electromagnetic field immunity test apparatus 10 of the sixth embodiment is additionally provided with a laser distance measuring sensor 51 for measuring the distance between the antenna element 12A and the electronic device 20 to be measured. The laser distance measuring sensor 51 is mounted on the coaxial line 12C by the mounting member 52. Since the coaxial line 12C has less influence on the dipole input impedance than the antenna element 12A, the influence on the dipole input impedance can be reduced by mounting the laser distance measuring sensor 51 on the coaxial line 12C. .

  When measuring with the laser distance measuring sensor 51, the laser light is irradiated toward the electronic device 20 to be measured, the laser light is reflected by the housing of the electronic device 20 to be measured, and the reflected light is reflected by the sensor 51 for measuring the laser distance. By capturing, the distance between the antenna element 12A and the electronic device 20 to be measured is measured from the time difference between the time of laser light irradiation and the time of light reception. The laser distance measurement sensor 51 is connected to an external distance display device 53 and outputs distance measurement data to the distance display device 53. Thereby, the measurement result of the distance between the antenna element 12A and the electronic device 20 to be measured is displayed on the distance display device 53, and the examiner can visually confirm the measurement result. This embodiment is effective when evaluating the immunity level of the electronic device 20 to be measured based on the distance between the antenna element 12A and the electronic device 20 to be measured.

  As described above, since the distance between the antenna element 12A and the electronic device 20 to be measured can be immediately detected by the laser distance measuring sensor 51, the time required for the immunity test can be greatly shortened.

[Seventh Embodiment]
Next, a seventh embodiment corresponding to claim 10 of the claims will be described with reference to FIGS. 9 and 10.

  Some electronic devices 20 to be measured require supply or discharge of a liquid material. When the flow rate of the liquid is large, a pipe having a large diameter is used to reduce the resistance. However, when the aperture is increased, there is an adverse effect that the amount of electromagnetic field leaking out from the conductive fabric bag 11 increases.

  Therefore, the radiated electromagnetic field immunity test apparatus 10 of the seventh embodiment includes the first through pipe 60A and the second through pipe 60B shown in FIG. 9 in order to reduce the leakage of the electromagnetic field in the above case. . These are collectively referred to as “through pipe 60”.

  As shown in FIG. 9, the through pipe 60 is connected to the electronic device to be measured 20 and is provided through a predetermined opening of the bag 11. As shown in FIG. 10, the through pipe 60 penetrates the opening. The portion is constituted by a conductive pipe 62, and both ends of the conductive pipe 62 are connected to the flexible pipes 61 and 63.

  In the opening, the conductive pipe 62 has a structure in which a conductive gasket 64 is wound, the protruding portion 11C of the bag 11 is covered from the outside, and further tightened by a fastener 65 from the outside. That is, the conductive pipe 62 is provided so as to be in electrical contact with the protruding portion 11C through the conductive gasket 64 over the entire opening. In addition, a conductive honeycomb 66 is provided inside the conductive pipe 62 in order to shield the electromagnetic field.

  With such a structure, even with a large-diameter through pipe, supply or discharge of liquid material or the like to the electronic device to be measured is performed via the through pipe while keeping the electromagnetic field leaking outside the bag small. Can do.

  In each of the above-described embodiments, an example in which a dipole antenna is used as an antenna of a radiated electromagnetic field immunity test apparatus is shown, but the present invention is not limited to this, and even when other types of antennas are used, The same effect can be obtained.

It is a block diagram which shows an example of the conventional radiation electromagnetic field immunity test apparatus. It is a block diagram of the radiation electromagnetic field immunity test apparatus of 1st Embodiment. It is a figure which shows the opening part fastening structure of the dipole antenna of 2nd Embodiment. It is a figure which shows the opening part fastening structure of the ventilation pipe of 2nd Embodiment. It is a block diagram of the radiation electromagnetic field immunity test apparatus of 3rd Embodiment. It is a block diagram of the radiated electromagnetic field immunity test apparatus of 4th Embodiment. It is a block diagram of the radiation electromagnetic field immunity test apparatus of 5th Embodiment. It is a block diagram of the radiation electromagnetic field immunity test apparatus of 6th Embodiment. It is a block diagram of the radiation electromagnetic field immunity test apparatus of 7th Embodiment. It is a figure which shows the opening part fastening structure of the penetration pipe of 7th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Radiated electromagnetic field immunity test apparatus, 11 ... Bag, 12 ... Dipole antenna, 13 ... Antenna feeder, 14 ... Blower pipe, 14A, 62 ... Conductive pipe, 15 ... Blower, 16 ... Transmission signal simulator, 20 ... Measured Electronic devices 21, 23, 64 ... conductive gaskets, 22, 24, 65 ... fasteners, 25, 66 ... conductive honeycombs, 30 ... pipes, 31, 32, 33 ... metal fasteners, 40 ... housings, 41 Connector for power supply, 42 Low-pass filter for power supply, 43, 47 ... Power supply line, 44 ... Connector for signal, 45 ... Low-pass filter for signal line, 46, 48 ... Signal line, 50 ... Radio wave absorber, 51 ... Laser distance Sensor for measurement, 53... Distance display device, 60.

Claims (10)

A bag made of conductive fabric;
An antenna inserted into the bag;
An antenna feeder serving as a high-frequency signal supply path to the antenna;
Radiated electromagnetic field immunity test equipment with   The radiated electromagnetic field immunity test apparatus according to claim 1, further comprising a blower pipe serving as an air supply path to the inside of the bag.   The radiated electromagnetic field immunity test apparatus according to claim 1, wherein the conductive fabric of the bag is transparent. The antenna is a connection path between the antenna element and the antenna feeder, and includes a coaxial line provided through a predetermined opening of the bag,
The said coaxial line is provided in the said opening part so that the conductive cloth of the said bag may be electrically contacted through a conductive gasket over the whole said opening part. The radiated electromagnetic field immunity test apparatus according to any one of the above. The blower pipe is configured to include a conductive pipe provided through a predetermined opening of the bag,
In the opening, the conductive pipe is provided so as to be in electrical contact with the conductive cloth of the bag through a conductive gasket throughout the opening, and the conductive pipe is provided inside the conductive pipe. The radiated electromagnetic field immunity test apparatus according to any one of claims 1 to 4, wherein a honeycomb is inserted.   The radiated electromagnetic field immunity test apparatus according to claim 1, wherein at least one metal fastener is provided on a surface of the bag. A conductive housing electrically connected to the bag;
A low pass filter for power supply provided inside the housing;
A low-pass filter for signal lines provided inside the housing;
A power supply connector for connecting the power supply line for supplying the power to be measured to the electronic equipment to be measured and the power supply lowpass filter;
A signal connector for connecting the signal line connected to the electronic device to be measured and the low-pass filter for the signal line;
The radiated electromagnetic field immunity test apparatus according to any one of claims 1 to 6, further comprising:   The electromagnetic field immunity test apparatus according to any one of claims 1 to 7, wherein a radio wave absorber is attached to a part or all of the inner surface of the bag.   The radiated electromagnetic field immunity test apparatus according to any one of claims 1 to 8, further comprising a laser distance measurement sensor mounted on a coaxial line between an antenna element and the antenna feeder in the antenna. The radiated electromagnetic field immunity test apparatus further includes one or more through pipes connected to an electronic device to be measured disposed inside the bag and provided through a predetermined opening of the bag,
The through portion of the opening in the through pipe is constituted by a conductive pipe,
In the opening, the conductive pipe is provided so as to be in electrical contact with the conductive cloth of the bag through a conductive gasket throughout the opening, and the conductive pipe is provided inside the conductive pipe. A radiated electromagnetic field immunity test apparatus according to any one of claims 1 to 9, wherein a honeycomb is inserted.

Images