JPH09311153A - Antenna tower and radiation immunity testing facility using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna tower by which two radiation antennas are made independently movable. SOLUTION: The output of a first motor 29 is transmitted through a first gear 27 to a first belt 25 connected with and fixed in a first jig 31 holding a first radiation antenna 1 to move the first antenna 1 up and down. The output of a second motor 30 is transmitted through a second gear 28 to a second belt 26 connected with and fixed in a second jig 32 holding a second radiation antenna 2 to move the second antenna 2 up and down. Consequently, two radiation antennas 1, 2 can be moved independently by one vertically installed mast 20 for antenna movement and can be combined at optional positions in one and the same line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test facility necessary for an immunity test of electronic equipment, particularly an antenna tower and a radiated immunity test facility using the antenna tower.

[0002]

2. Description of the Related Art FIGS.
This is the conventional antenna tower shown in Japanese Patent Publication No. FIG.
FIG. 7 is an overall configuration diagram, and FIG. 7 is a partial side view showing an example of a configuration of a portion for raising and lowering the antenna and rotating the antenna around its input axis.

In each drawing, 103 is an antenna and 105
Is an antenna mounting pipe, 111 is a main pillar, 113 is a cursor, 114 is a timing belt for raising and lowering the antenna, 115
Is a pulley for lifting the antenna, 116 is a motor for lifting the antenna, 117 is a timing belt for rotating the antenna, 118
Is an antenna rotating pulley, 119 is an antenna rotating motor, 125, 126, 127 are pulleys, and 135 is an operating gear.

In FIG. 6, the antenna 103 is connected to the main pillar 11
In the case of raising and lowering along 1, the antenna raising / lowering motor 116 drives the antenna raising / lowering timing belt 114. On the other hand, when the antenna 103 is rotated around its input shaft in the antenna mounting pipe 105, the antenna rotation motor 119 drives the antenna rotation timing belt 117.

FIG. 7 shows an example of the cursor 113 to which the antenna 103 is attached. The antenna lifting / lowering timing belt 114 is fixed to the cursor 113. On the other hand, the antenna rotation timing belt 117 works to rotate the antenna 103 by the action of the pulleys 125, 126, 127.

As shown in FIG. 8, a differential gear 135 is provided in order to rotate the antenna while moving it up and down without any inconvenience.

[0007]

The conventional antenna tower constructed as described above has the above-mentioned structure for measuring electromagnetic noise of EMI (Electro-magnetic Interference), that is, electromagnetic interference or electromagnetic interference generated from electronic and electric devices. Since it is configured as described above, only one antenna can be rotated or moved up and down. However, the conditions for performing the radiated immunity test (eg I
In order to satisfy EC1000-4-3), using two antennas is an effective means.

That is, a semi-anechoic chamber with a metal floor
In the radiated immunity test facility using (EMC test site), the direct wave from each antenna is generated in the uniform area of the electric field defined by the distance of a certain horizontal distance from the radiating antenna by using two radiating antennas. And the reflected waves on the floor are summed up. When there is only one radiating antenna, since there are only one direct wave and one reflected wave, fringes are always formed, and the prescribed area cannot be made uniform.

However, by using two radiating antennas and adjusting the height from each floor to an appropriate value, the electric field in the prescribed region can be made uniform.
In the conventional antenna tower, since the two antennas cannot be moved independently, there is a problem that the radiated immunity test using the above two antennas cannot be performed.

The present invention has been made in order to solve the above problems, and an antenna tower that enables two antennas to move independently vertically and vertically and horizontally does not collide with each other. It is an object of the present invention to provide an antenna tower provided with an antenna tower controller that is controlled as described above, and a radiated immunity test facility capable of automating a radiated immunity test including the antenna tower and the antenna tower controller.

[0011]

In view of the above object, the first invention of the present invention is an antenna tower for movably supporting a plurality of radiating antennas, the antenna having a plurality of sets of side surfaces facing each other. A moving mast, a plurality of jigs that move coaxially along the longitudinal direction of the antenna moving mast, a plurality of radiating antennas supported by these jigs, and the plurality of jigs. A plurality of antenna moving belts connected and fixed to each of the antenna moving masts along the longitudinal direction of the side surface of each set of the antenna moving masts, and a plurality of belts for driving the antenna moving belts. Drive means of
It is in the antenna tower that is equipped with.

According to a second aspect of the present invention, the antenna moving mast is provided with two jigs each supporting one radiation antenna, and the two radiation antennas are independent of each other. The antenna tower according to claim 1, wherein the antenna tower is movable in a longitudinal direction and is used for a radiated immunity test.

According to a third aspect of the present invention, the jig has a sub-mast portion extending in a direction orthogonal to the moving direction of the jig and having at least one pair of side surfaces facing each other, and the sub-mast portion extending in the longitudinal direction. At least one sub jig that moves coaxially on each side, a radiation antenna supported by each of the sub jigs, and one of the sub mast portions that is connected and fixed to each of the sub jigs. 7. At least one antenna moving belt hung on each side of the set, and at least one driving means for driving each of these antenna moving belts. 1
Located in the antenna tower described in.

According to a fourth aspect of the present invention, two jigs each provided with one sub jig supporting one radiation antenna movable in the longitudinal direction of the sub mast portion are provided, and these jigs are provided. Is used for a radiated immunity test in which two radiating antennas that move in a longitudinal direction of the antenna moving mast orthogonal to the sub-mast portion are independently movable in a common plane. The antenna tower according to item 3.

In a fifth aspect of the present invention, a detector for detecting the position of each radiating antenna from the driving means, and a calculation for calculating at least one of a vertical distance and a horizontal distance between the radiating antennas from the detected value. Section, an input section for inputting the minimum value of the distance between the radiating antennas, a comparing section for comparing the calculated value of the calculating section and the input value of the input section, and the actual distance between the radiating antennas from the comparison result. 5. An antenna tower controller further comprising: a control unit that controls the driving means so as to stop the movement of the radiation antenna when the input distance becomes equal to or less than the minimum value. It is located in one of the antenna towers.

According to a sixth aspect of the present invention, an EMC test site having a metal floor surface, an antenna tower provided in the EMC test site and provided with two independently movable radiation antennas, and the EMC described above. Move the two radiating antennas so that they do not collide with a non-conductive turntable for placing the device under test at a position in the test site that is a predetermined distance away from the radiating antennas and the electric field due to the radiating antennas is uniform. An antenna tower controller for controlling, a turntable controller for controlling rotation of the turntable in order to change the direction of the device under test with respect to the radiation antenna, and a signal which is connected to the two radiation antennas and generates desired signals respectively. Separates and absorbs the signal returned from the radiating antenna to the signal generating means from the generating means. Radiation immunity test equipment comprising signal absorption means and main control means connected to the antenna tower controller, turntable controller, and signal generation means to integrally control these to perform a radiation immunity test. It is in.

A seventh aspect of the present invention further comprises electric field detecting means for detecting electric fields at a plurality of positions where the device under test is placed, and the main control means is detected by the electric field detecting means. The radiated immunity test facility according to claim 6, wherein the result is fed back for control.

According to an eighth aspect of the present invention, the electric field detecting means detects an electric field, an electric field sensor moving device for moving the electric field sensor, and an electric field strength for measuring an electric field strength detected by the electric field sensor. And a controller for moving an electric field sensor for controlling the operation of the electric field sensor moving device, wherein the position of the electric field sensor is sequentially changed by the controller for moving the electric field sensor by the main control means, and the output of the electric field intensity meter is output. Is fed back to the main control means. The radiated immunity test facility according to claim 7, wherein

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below according to each embodiment. Embodiment 1. FIG. 1 is a diagram showing a configuration of an antenna tower according to an embodiment of the present invention. In the antenna tower 70 of FIG. 1, 1 is a first radiating antenna and 2 is a second
Radiating antenna, 20 is a mast for moving the antenna, 21 is one side of the mast, 22 is another side of the mast,
23 is an upper part of the mast, 23a is an upper through hole, 24 is a lower part of the mast, 24a is a lower through hole, 25 is a first antenna moving belt, 26 is a second antenna moving belt, 2
Reference numeral 7 is a first gear, 28 is a second gear, 29 is a first motor, 30 is a second motor, 31 is a first jig, and 32 is a second jig. The first gear 27 and the first motor 29, and the second gear 28 and the second motor 30 respectively constitute driving means.

In FIG. 1, the output of the first motor 29 is passed through a first gear 27 to a first belt 25 connected and fixed to a first jig 31 holding the first radiating antenna 1. Is transmitted as a result, the first radiating antenna 1 is moved up and down. The belt 25 has, on the back side not shown in FIG. 1, through holes formed in the jigs 31 and 32, respectively.
It extends through (not shown). The output of the second motor 30 is the second jig 32 for holding the second radiation antenna 2.
Is transmitted to the second belt 26 connected and fixed to the second belt 26 via the first gear 28 to move the second radiation antenna 2 up and down. The belt 26 has a through hole formed in each of the jigs 31 and 32 on the back side not shown in FIG.
It extends through (not shown).

Belt 2 for moving the first radiation antenna 1
Reference numeral 5 denotes a pair of side surfaces 21, an upper portion 23 and a lower portion 24 of the vertically arranged antenna moving mast 20 which face each other.
Is arranged along (partially penetrates the lower through hole 24a),
The belt 26 for moving the second radiating antenna 2 is a pair of opposite side surfaces 21 of the antenna moving mast 20.
It is arranged along the upper part 23 and the lower part 24 (partially penetrating the upper through hole 23a). Therefore, the two radiating antennas 1 and 2 can be independently moved along one antenna moving mast 20, and can be combined at arbitrary positions on the same line.

In the antenna tower having the above structure, the vertical relationship between the first radiating antenna 1 and the second radiating antenna 2 cannot be reversed, but in the radiating immunity test using two radiating antennas, the same antenna is used. When the same signal is supplied to the two radiating antennas, it is not necessary to distinguish between the two radiating antennas, and therefore it is not necessary to reverse the vertical relationship.
Further, even when different signals are supplied, by exchanging the supplied signals, it is possible to obtain the same effect as that when the vertical relationship of the two antennas is reversed.

In the above-described embodiment, the antenna moving mast 20 is set to 2 in consideration of the radiation immunity test.
The case where two horizontal antennas each having a pair of opposite side surfaces are rectangular has been described, but the antenna moving mast has N pairs of horizontal sections each having a pair of opposing side surfaces and has a 2N polygonal shape. The radiation antennas of can be moved independently. This also applies to the following embodiments.

Embodiment 2 FIG. FIG. 2 is a diagram showing a configuration of an antenna tower according to another embodiment of the present invention. Portions that are the same as or correspond to those in the above embodiment are denoted by the same reference numerals. In FIG. 2, 33 is a first sub-mast portion extending in a direction orthogonal to the antenna moving mast 20 provided on the first jig 31, and 34 is the antenna moving mast 20 provided on the second jig 32. Second extending in a direction orthogonal to
Is the sub-mast part of.

Reference numeral 35 denotes a third antenna moving belt provided on the first sub-mast portion 33, and 36 denotes a fourth antenna moving belt provided on the second sub-mast portion 34.
7 is a third gear provided on the belt 35, 38 is a fourth gear provided on the belt 36, 39 is a third motor provided on the third gear 37, and 40 is a fourth gear. A fourth motor provided for the gear 38 of the
Is a sub jig for holding the radiating antenna 1 and 42 is a sub jig for holding the second radiating antenna 2. 33
Reference numerals a and 34a are end through holes through which the belt penetrates.

In FIG. 2, the output of the first motor 29 is transmitted to the first belt 25 via the first gear 27, and the jig 31 connected and fixed to the first belt 25 is used for moving the antenna. Move up and down along the mast 20. First
Since the jig 31 is provided with the sub-mast portion 33 for moving the first radiation antenna 1 in the horizontal direction,
The first radiation antenna 1, the sub jig 41, and the sub mast portion 33 move up and down together with the jig 31. The output of the third motor 39 is transmitted to the belt 35 fixed to the sub jig 41 holding the first radiating antenna 1 via the third gear 37, and the first radiating antenna 1 is moved to the sub mast portion 3
Move left and right along 3.

The output of the second motor 30 is the output of the second gear 2.
The jig 32, which is transmitted to the second belt 26 via 8 and is connected and fixed to the second belt 26, is moved up and down along the antenna moving mast 20. Since the second jig 32 is provided with the sub-mast portion 34 for moving the second radiation antenna 2 in the horizontal direction, the second radiation antenna 2, the sub jig 42, and the sub-mast portion 34 are jigs. 32
Move up and down with. The output of the fourth motor 40 is
It is transmitted via the fourth gear 38 to the belt 36 fixed to the sub jig 42 that holds the second radiation antenna 2, and moves the second radiation antenna 2 left and right along the sub mast portion 34.

The first belt 25 for moving the first radiating antenna 1 is provided with the mast 2 for vertically moving the antenna.
The second belt 26 for moving the second radiating antenna 2 is arranged along a pair of side surfaces 21, 0, and 23 facing each other, and the lower portion 24 (which partially penetrates the lower through hole 24a).
Are arranged along another pair of facing side surfaces 21, upper portion 23, and lower portion 24 (partially penetrating the upper through hole 23a) of the antenna moving mast 20.

Therefore, the two radiating antennas 1 and 2 can move up and down independently along one antenna moving mast 20. In addition, the first and second radiating antennas 1 and 2 are submast portions 33,
Since the sub jigs 41 and 42 are provided on the sub mold 34, the sub jigs can be moved to the left and right independently along the axes of the sub mast portions 33 and 34. Therefore, the two radiating antennas 1 and 2 can be combined at arbitrary positions on the same plane.

In the antenna tower having the above structure, the vertical relationship between the first radiating antenna 1 and the second radiating antenna 2 cannot be reversed, but in the radiating immunity test using two radiating antennas, the same antenna is used. When the same signal is supplied to the two radiating antennas, it is not necessary to distinguish between the two radiating antennas, and therefore it is not necessary to reverse the vertical relationship.
Further, even when different signals are supplied, by exchanging the supplied signals, it is possible to obtain the same effect as that when the vertical relationship of the two antennas is reversed. Similar to the antenna moving mast 20, each of the sub-mast portions 33 and 34 may be provided with a plurality of radiating antennas and moved independently.

Embodiment 3 This embodiment relates to an antenna tower controller that controls the operation of the radiating antenna of the above embodiment without collision. FIG. 3 is a diagram showing a configuration of an antenna tower controller of an antenna tower according to another embodiment of the present invention. Portions that are the same as or correspond to those in the above embodiment are denoted by the same reference numerals.

In FIG. 3, 7 is an antenna tower controller, 43 is a control unit, 44 is a detection unit, 45 is a calculation unit, 46 is an input unit, and 47 is a comparison unit.

The control unit 43 controls the first radiation antenna 1
A first motor 29 for vertically driving, a third motor 39 for horizontally driving, a second motor 30 for vertically driving the second radiating antenna 2 and a fourth motor for horizontally driving Control 40 independently. Further, the detection unit 44 detects the vertical and horizontal positions of the first radiating antenna 1 and the second radiating antenna 2 (only in the vertical direction in the case of the first embodiment).
The calculation unit 45 calculates the vertical distance and the horizontal distance between the first radiating antenna 1 and the second radiating antenna 2 based on the value detected in.

Further, the minimum values of the vertical and horizontal distances of the first radiating antenna 1 and the second radiating antenna are input from the input unit 46, and the value calculated by the calculation unit 45 and the value input by the input unit 46 are compared. The comparison will be made in part 47. Then, from the result of the comparison unit 47, the control unit 43 stops the movement of the radiating antennas when the vertical distance or the horizontal distance between the two radiating antennas 1 and 2 becomes equal to or less than the input minimum value.

By controlling the antenna tower using the antenna tower controller 7 as described above, the first
The two radiation antennas 1 and 2 can be independently moved without colliding with each other.

Embodiment 4 FIG. This embodiment relates to a radiated immunity test facility in which a test using the antenna tower and the antenna tower controller of the above embodiment is automated. FIG. 4 is a diagram showing the configuration of the radiated immunity test facility according to the embodiment of the present invention. Parts that are the same as or correspond to those in the above-described embodiment are denoted by the same reference numerals.

In FIG. 4, 73 is a radiation immunity test facility, 1 and 2 are radiation antennas, and 70 or 71.
Is an antenna tower, 6 is a turntable, 7 is an antenna tower controller, 8 is a turntable controller, 9 is a controller including a computer, 10 is an EMC test site (electromagnetic semi-anechoic chamber), 11 is a ground plane, and 12 is an electric field. Uniform region, 51 is a phase shifter, 52 is an amplifier / attenuator, 53 is a directional coupler, 54 is a resistor, 5
5 is a signal generator, 56 is a power amplifier, 57 is a power splitter, and 59 is a table.

The signal generator 55 and the power amplifier 5
6, the power splitter 57, the phase shifter 51 and the amplifier / attenuator 52 constitute signal generating means, and the directional coupler 53,
The resistor 54 constitutes a signal absorption stage, and the controller 9 constitutes main control means.

In order to satisfy the homogeneity of the electric field in the area defined on the vertical plane at a constant distance from the radiation antenna, which is required in the radiation immunity test, the EMC test site (radio wave Using two radiating antennas in a semi-anechoic room is an effective means. The electric field in the defined area is the horizontal distance between the two radiating antennas (the position in the left-right direction in one vertical plane facing the area).
In addition to the height from the ground plane and the phase of the signal supplied to each radiating antenna, by changing the amplitude of the signal to an appropriate value using an amplifier or attenuator,
Excellent uniformity can be obtained.

The radiated immunity test facility using the antenna tower and the antenna tower controller shown in the first, second, and third embodiments will be described below with respect to the facility capable of automating the test.

The signal output from the signal generator 55 is amplified by the power amplifier 56 and split into two signals by the power splitter 57. After that, the phase of the signal is changed by the phase shifter 51 and the amplitude thereof is changed by the amplifier / attenuator 52, and then the signals are supplied to the two radiating antennas 1 and 2.

Then, the antenna tower 7 according to the first or second embodiment installed in the EMC test site 10 is described.
0 and 71 are used to set the horizontal distances of the radiation antennas 1 and 2 and the height from the ground plane 11 to appropriate values. Electromagnetic waves radiated from the radiation antennas 1 and 2 arranged at appropriate positions are, for example, IEC1000.
Area 12 defined by -4-3 (1.5 × 1.5 m vertical plane on a non-conductive table 59 having a height of 80 cm, which is placed at a fixed horizontal distance from the radiating antenna)
Can be made uniform.

The antenna tower controller 7 described in the third embodiment is used to control the antenna towers 70 and 71. Furthermore, the orientation of the device under test can be changed by rotating the turntable 6, and the turntable controller 8 is used to control the turntable 6. A signal transmitted from the radiating antennas 1 and 2 to the transmitting device side due to coupling between the antennas and reflection from a metallic floor surface is separated by the directional coupler 53, and then separated by the resistor 54. Power is consumed.

In the radiated immunity test facility as described above, each frequency to be tested (for example, 80 M to 1 GHz)
Antenna tower controller 7, turntable controller 8, signal generator 5 according to the orientation of the device under test or
By controlling the power amplifier 56, the power amplifier 56, the phase shifter 51, and the amplifier / attenuator 52 with the controller 9, the radiation immunity test can be automated.

Embodiment 5 FIG. FIG. 5 is a diagram showing a configuration of a radiated immunity test facility according to another embodiment of the present invention. Parts that are the same as or correspond to those in the above-described embodiment are denoted by the same reference numerals. In FIG. 5, 74 is a radiation immunity test facility, 17 is an electric field sensor, 18 is an electric field sensor moving device, 19 is an electric field sensor moving controller, and 58.
Is an electric field strength meter.

In order to perform the radiated immunity test, it is necessary to confirm whether or not the prescribed area is uniform before irradiating the device under test with electromagnetic waves. this is,
It is possible to add the electric field detection means including the electric field sensor 17, the electric field sensor moving device 18, the electric field sensor moving controller 19, and the electric field intensity meter 58 to the radiation immunity test facility described in the above embodiment.

That is, the electric field sensor 17 attached to the electric field sensor moving device 18 is arranged in the region 12 defined by controlling the electric field sensor moving device 18 with the electric field sensor moving controller 19. An electric field strength meter 58 is connected to the electric field sensor 17, and measures the electric field strength at the position where the electric field sensor 17 is arranged. In the same manner, the electric field strength at other positions within the defined region 12 is measured.

The electric field sensor moving device 18 can use the antenna tower described in the second embodiment, and the electric field sensor moving controller 19 can use the antenna tower controller described in the third embodiment.

Furthermore, by adding the function of accumulating and processing the measurement results at each point in the area 12 in the controller 9, it is possible to automatically confirm the uniformity of the electric field in the area 12. Further, when the uniformity is not sufficiently obtained, the antenna tower controller 7, the signal generator 55, the power amplifier 56, the phase shifter 51, based on the measurement result accumulated in the controller 9, is used by an appropriate algorithm. The readjustment of the amplifier / attenuator 52 allows automatic setting for good field uniformity.

[0050]

As described above, according to the first aspect of the present invention, the antenna tower is provided with the antenna moving mast having a plurality of sets of side surfaces facing each other and coaxially along the longitudinal direction of the antenna moving mast. A plurality of jigs that move to each of them, a plurality of radiating antennas supported by these jigs, and a long side surface of each set of the antenna moving mast that is connected and fixed to each of the plurality of jigs. Since it is composed of a plurality of antenna moving belts respectively hung along the direction and a plurality of driving means for respectively driving these antenna moving belts, one vertically arranged one is provided. Multiple radiating antennas can be moved independently in the longitudinal direction of the antenna moving mast, and multiple radiating antennas can be placed at any combination position on the same line. Effects such that can provide an antenna tower capable of location is obtained.

According to a second aspect of the present invention, the antenna moving mast is provided with two jigs each supporting one radiation antenna, and two radiation antennas are provided independently of each other. Since it is movable in the longitudinal direction, it is possible to obtain the effect that an optimum antenna tower for the radiation immunity test can be provided.

In a third aspect of the present invention, the jig is
A sub-mast portion extending in a direction orthogonal to the moving direction of the sub-mast portion and having at least one pair of side surfaces facing each other, and at least one sub-jig for moving the sub-mast portion coaxially along the longitudinal direction. A radiation antenna supported by each sub jig, and at least one antenna connected to and fixed to each of the sub jigs and hung on each side of one of the sub mast portions. Since the belt for driving and at least one driving means for driving these belts for moving the antennas are included, a plurality of radiating antennas can be independently moved on the same plane. It is possible to provide an antenna tower in which the radiating antennas can be arranged in any combination on the same plane. Effect can be obtained.

According to a fourth aspect of the present invention, two jigs each having one sub jig for supporting one radiating antenna movable in the longitudinal direction of the sub mast portion are provided,
Since these jigs can be moved in the longitudinal direction of the antenna moving mast which is orthogonal to the sub-mast portion, the two radiating antennas can be independently moved in a common plane, which is most suitable for the radiation immunity test. The effect that an antenna tower can be provided can be obtained.

In a fifth aspect of the present invention, a detector for detecting the position of each radiating antenna from the driving means, and an operation for calculating at least one of a vertical distance and a horizontal distance between the radiating antennas from the detected value. Section, an input section for inputting the minimum value of the distance between the radiating antennas, a comparing section for comparing the calculated value of the calculating section and the input value of the input section, and the actual distance between the radiating antennas from the comparison result. Since the antenna tower controller further includes a control unit that controls the drive means so as to stop the movement of the radiation antenna when the input distance becomes equal to or less than the minimum value, the radiation tower is independent without colliding with the radiation antenna. It is possible to obtain an effect such as providing an antenna tower that can be moved to.

According to a sixth aspect of the present invention, an EMC test site having a metal floor surface, an antenna tower provided in the EMC test site and provided with two independently movable radiation antennas, and the above-mentioned EMC Move the two radiating antennas so that they do not collide with a non-conductive turntable for placing the device under test at a position in the test site that is a predetermined distance away from the radiating antennas and the electric field due to the radiating antennas is uniform. An antenna tower controller for controlling, a turntable controller for controlling rotation of the turntable in order to change the direction of the device under test with respect to the radiation antenna, and a signal which is connected to the two radiation antennas and generates desired signals respectively. Separates and absorbs the signal returned from the radiating antenna to the signal generating means. As the radiated immunity test equipment, the signal absorption means and the main control means connected to the antenna tower controller, the turntable controller, and the signal generation means to collectively control these to perform a radiated immunity test, It is possible to provide effects such as providing a radiated immunity test facility that can automate the radiated immunity test.

In the seventh and eighth inventions of the present invention, an electric field detecting means for detecting electric fields at a plurality of positions where the device under test is placed is further provided, and the main control means is constituted by the electric field detecting means. Since the control is performed by feeding back the detected result, it is possible to provide the effect of providing a radiated immunity test facility that can automatically make the uniform region of the electric field uniform.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an antenna tower according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an antenna tower according to another embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of an antenna tower controller of an antenna tower according to another embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a radiated immunity test facility according to an embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a radiated immunity test facility according to another embodiment of the present invention.

FIG. 6 is a diagram showing an overall configuration of a conventional antenna lifting device.

FIG. 7 is a partial side view showing an example of a configuration of a portion for raising and lowering the antenna of the device of FIG. 6 and rotating the antenna around its input axis.

FIG. 8 is a diagram showing a configuration of a differential gear used in a conventional device.

[Explanation of symbols]

1 1st radiation antenna, 2 2nd radiation antenna, 6
Turntable, 7 antenna tower controller, 8
Turntable controller, 9 controller, 1
0 EMC test site, 11 ground plane, 1
2 areas, 17 electric field sensor, 18 electric field sensor moving device, 19 electric field sensor moving controller, 20 antenna moving mast 21, 22 side surface, 25 first antenna moving belt, 26 second antenna moving belt, 27 1st gear, 28 2nd gear, 29 1st motor, 30 2nd motor, 31 1st jig, 32
Second jig, 33, 34 Sub-mast part, 35 Third
Antenna moving belt, 36 fourth antenna moving belt, 37 third gear, 38 fourth gear, 39
Third motor, 40 Fourth motor, 41, 42 Sub jig, 43 Control unit, 44 Detection unit, 45 Calculation unit, 4
6 input section, 47 comparison section, 51 phase shifter, 52 amplification / attenuator, 53 directional coupler, 54 resistor, 55
Signal generator, 56 power amplifier, 57 power splitter, 58 electric field intensity meter, 59 table 70, 71
Antenna tower, 73,74 Radiated immunity test facility.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoto Oka 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) Inventor Mitsuhiko Kanda 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) Inventor Yu Uchida 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (8)

[Claims] 1. An antenna tower for movably supporting a plurality of radiating antennas, the antenna moving mast having a plurality of sets of side surfaces facing each other, and coaxially extending along the longitudinal direction of the antenna moving mast. A plurality of jigs that move to each, a plurality of radiating antennas supported by these jigs, and a long side surface of each set of the antenna moving mast that is connected and fixed to each of the plurality of jigs. An antenna tower comprising: a plurality of antenna moving belts, which are respectively hung along a direction, and a plurality of driving means for respectively driving these antenna moving belts. 2. The antenna moving mast is provided with two jigs each supporting one radiation antenna, and the two radiation antennas are independently movable in the longitudinal direction of the antenna moving mast, The antenna tower according to claim 1, wherein the antenna tower is used for a radiation immunity test. 3. The sub-mast portion, wherein the jig extends in a direction orthogonal to the moving direction of the jig and has at least one pair of side surfaces facing each other, and the sub-mast portion is coaxially moved along the longitudinal direction. At least one sub jig, a radiation antenna supported by each of the sub jigs, connected and fixed to each of the sub jigs, and along each side surface of one of the sub mast portions. The antenna tower according to claim 1, further comprising: at least one antenna moving belt hung on the antenna, and at least one driving unit for driving each of the antenna moving belts. 4. The two jigs provided with one sub jig supporting one radiation antenna movable in the longitudinal direction of the sub mast portion are provided, and these jigs are orthogonal to the sub mast portion. The antenna tower according to claim 3, wherein the two radiating antennas that move in the longitudinal direction of the antenna moving mast are independently movable in a common plane, and are used for a radiating immunity test. . 5. A detecting section for detecting the position of each radiating antenna from the driving means, an arithmetic section for calculating at least one of a vertical distance and a horizontal distance between the radiating antennas based on the detected value, and between the radiating antennas. The input unit that inputs the minimum value of the distance, the comparison unit that compares the calculated value of the calculation unit and the input value of the input unit, and the actual distance between the radiating antennas from the comparison result, the minimum value of the input distance The antenna according to any one of claims 1 to 4, further comprising an antenna tower controller including a control unit that controls the driving unit to stop the movement of the radiation antenna when the following occurs. tower. 6. An EMC test site having a metal floor surface, an antenna tower provided with two independently movable radiating antennas provided in the EMC test site, and the radiating antenna in the EMC test site. A non-conductive turntable for placing the device under test at a position where the electric field due to the radiating antenna is uniform, a predetermined distance from the antenna tower controller for controlling the movement of the two radiating antennas so as not to collide with each other; A turntable controller that controls the rotation of the turntable to change the direction of the device under test with respect to the radiation antenna; signal generation means that is connected to the two radiation antennas and that generates a desired signal in each of the two radiation antennas; Signal absorbing means for separating and absorbing a signal returning from the signal generating means to the signal generating means, Serial antenna tower controller, radiation immunity test equipment to a main control unit for performing radiation immunity test by controlling these totally connected to the turntable controller and signal generating means, characterized in that it consists of. 7. An electric field detecting means for detecting electric fields at a plurality of positions where the device under test is placed,
The radiated immunity test facility according to claim 6, wherein the main control means feeds back a result detected by the electric field detection means to perform control. 8. The electric field detecting means detects an electric field, an electric field sensor for moving the electric field sensor, an electric field sensor moving device for moving the electric field sensor, an electric field intensity meter for measuring the electric field strength detected by the electric field sensor, and the electric field sensor moving device. The controller for moving the electric field sensor for controlling the operation of the electric field sensor, the position of the electric field sensor is sequentially changed by the controller for moving the electric field sensor by the main controller, and the output of the electric field intensity meter is fed back to the main controller. The radiated immunity test facility according to claim 7, wherein