KR101741663B1

KR101741663B1 - Testing system with multi-antenna

Info

Publication number: KR101741663B1
Application number: KR1020150179357A
Authority: KR
Inventors: 한연수; 최원선; 김중근
Original assignee: 주식회사 이레테크
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2017-06-15

Abstract

The present invention provides a technique for a multi-antenna test system in which, in a system for testing a test body (a receiving body) using a plurality of antennas, the test is automatically performed while the antennas are replaced without manually changing the antennas.

Description

Multi-antenna test system {TESTING SYSTEM WITH MULTI-ANTENNA}

TECHNICAL FIELD The present invention relates to a technique for testing radio wave reception characteristics of a test body using a plurality of antennas.

As electronic devices become more and more digital and faster, the circulating currents in the circuits of electronic devices have increased, and electronic devices have generated more noise and electromagnetic waves. For this reason, regulations are being strengthened against electromagnetic noise or electromagnetic waves generated in electronic devices, and a variety of electromagnetic characteristic test systems for measuring whether electronic devices satisfy such regulations are being proposed.

On the other hand, in order to test the electromagnetic characteristics of a specific product, it is necessary to receive electromagnetic signals such as a probe or an antenna. For example, an electromagnetic wave receiving antenna is required to test the characteristics of electromagnetic waves emitted from a specific product, and an electric field pull is required to test an electric field (e-field) emitted from a specific product.

In the electromagnetic characteristics test, the performance of the human body is important enough to determine the performance of the whole test. Accordingly, apart from a system for testing the electromagnetic characteristics of a specific product, a human body test system for measuring the signal reception performance of the human body used in such a system has been developed.

On the other hand, there are some bodies which are not used for the electromagnetic characteristics test, for example, water bodies used in communication equipments. These receiving bodies also use the above-described receiving body testing system to test their performance.

Since receivers can receive signals in a wide band, it is necessary to test the reception performance for all possible receivers. However, in order to precisely transmit test signals for such a wide band, a plurality of signal transmission antennas are required.

More specifically, since the transmittable signal band is formed differently according to the characteristics, it is difficult to accurately transmit all the wide-band signals necessary for the receiver test with one antenna. In order to transmit the test signal of the wide band as described above, A signal transmission antenna of a signal transmission antenna is required.

However, when a plurality of signal transmitting antennas are used, there arises a problem that the antenna is periodically changed to match the test band during the test. In order to replace the antenna, it is necessary to stop the test operation, to allow the operator to replace the antenna in the chamber, and to check whether the alignment of the receiver and the receiver is correct. These times are the factors that increase the overall test time.

In view of the above, it is an object of the present invention to provide a test system for testing a test body (a receiving body) using a plurality of antennas, in which an antenna is automatically replaced without manually replacing the antenna .

In order to achieve the above-mentioned object, in one aspect, the present invention provides a radio communication system comprising: a plurality of antennas arranged to transmit radio waves in a first direction and to transmit radio waves of different bands; A mast table supporting the antenna and moving the antenna on a plane perpendicular to the first direction; A signal generator for generating a signal to be transmitted from the antenna; A first signal amplifier for amplifying a signal generated by the signal generator; A switch box for selectively connecting one of the plurality of antennas to the first signal amplifier; A mast controller for controlling movement of the mast table; A test body for receiving a signal transmitted from the antenna; A second signal amplifier for amplifying a signal received from the test body; A signal analyzer for analyzing a signal amplified by the second signal amplifier; And a test band is divided into a plurality of bands and the switch box is controlled for a selected first band among the plurality of bands to connect the first antenna corresponding to the first band to the first signal amplifier, And controls the signal generator to transmit a signal corresponding to the first band and to output an analysis signal for the first band received through the signal analyzer A multi-antenna test system including a main controller for displaying on a device is provided.

As described above, according to the present invention, in a system for testing a test body (a receiving body) using a plurality of antennas, the antenna can be automatically replaced without manually replacing the antenna.

1 is a configuration diagram of a test system according to an embodiment.
2 is a view showing the arrangement relationship between the antenna and the test body.
3 is a view showing a plurality of antennas positioned on a mast table and a mast table.
4 is a diagram showing the center point of the first plate and the center point of each antenna.
5 is a view showing a reference point recognition sensor in a second direction.
6 is a view showing a reference point recognition sensor in a third direction.
Figure 7 is a view of another exemplary impeller moving the second plate in a third direction. 8 is a diagram showing a control flow of the test system for the first band of the test bands.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

1 is a configuration diagram of a test system according to an embodiment.

Referring to FIG. 1, a test system 100 includes a chamber 10 and may include a plurality of configurations located inside and outside of the chamber 10.

The inside of the chamber 10 can be configured with the configuration of the test body 30 and the configuration of the antenna 110 side.

First, a test object table 20 is placed in a chamber 10 and a test object 30 is placed on a test object table 20.

A cable for transmitting a received signal is connected to the test body 30, which is connected to a second signal amplifier 40 located outside the chamber 10.

A plurality of antennas 111, 112, 113, and 114 may be positioned on the mast table 120 with the mast table 120 disposed therein.

A cable is connected to each of the plurality of antennas 111, 112, 113 and 114, and the cable is connected to the switch box 130 located outside the chamber 10.

A cable is also connected to the mast table 120, which is connected to the mast controller 160 located outside the chamber 10.

A switch box 130, a first signal amplifier 140, a signal generator 150, a master controller 160, a second signal amplifier 40, a signal analyzer 50, and a main controller (not shown) are connected to the outside of the chamber 10 170 may be located.

The main controller 170 may control equipment located outside the chamber 10. For example, the main controller 170 may control the switch box 130, the signal generator 150, the master controller 160, and the signal analyzer 50.

The main controller 170 may then receive information from these devices. For example, the main controller 170 may receive information about the signal being transmitted by the signal generator 150 at each time, and may receive information about the antenna selected by the switch box 130, It is possible to receive the movement state information of the mast table 120 controlled by the mast controller 160 and receive the received signal characteristic information of the test body 30 from the signal analyzer 50. [

First, the signal generator 150 generates a signal to be transmitted from the antenna 110 and transmits the signal to the first signal amplifier 140.

The first signal amplifier 140 amplifies the signal received from the signal generator 150 and transmits the amplified signal to the switch box 130.

The switch box 130 selectively transmits a signal transmitted from the first signal amplifier 140 to one of the plurality of antennas 111, 112, 113, and 114. Specifically, the switch box 130 selectively connects one of the plurality of antennas 111, 112, 113, and 114 to the first signal amplifier 140. Then, the signal transmitted from the first signal amplifier 140 is selectively transmitted to one of the plurality of antennas 111, 112, 113, and 114.

When a signal is transmitted through the switch box 130, a test signal is transmitted from the selected one of the antennas.

The test body 30 receives the test signal and transmits it to the second signal amplifier 40.

The second signal amplifier 40 amplifies the signal received from the test body 30 and transmits the amplified signal to the signal analyzer 50.

The signal analyzer 50 analyzes the received signal to generate analysis information, which is displayed on a display device associated with the main controller.

2 is a view showing the arrangement relationship between the antenna and the test body.

The radio wave transmitted from the antenna 110 has a constant beam width 210. When the test object 30 is at the center 220 of the beam width 210, the signal transmitted from the antenna 110 can be best received.

2, the intensity of the received signal may be weak because the test piece 30a in the first position is located outside the beam width 210 emitted from the antenna 110. [ In addition, since the test object 30b in the second position is located inside the beam width 210 but is not located at the center of the beam width 210, not only the intensity of the signal is relatively weak, It is difficult to know whether or not it is being transmitted to the test body 30. The reception performance of the test body 30 is determined depending on how much the signal transmitted to the test body 30 is received by the test body 30. When it is difficult to grasp the intensity of the signal transmitted to the test body 30, Can be lowered.

It is preferable that the test body 30 is positioned at the center 220 of the beam width 210 emitted from the antenna 110 as the test body 30c at the third position. However, since there may be an error in the arrangement, the test body 30 should be located within the error range from the center line of the direction in which the signal is transmitted from the antenna 110. [

The test system 100 according to an embodiment includes a plurality of antennas 111, 112, 113 and 114 and uses the plurality of antennas 111, 112, 113 and 114 to transmit signals to the test body 30 . At this time, since the plurality of antennas 111, 112, 113, and 114 are disposed at different positions, there is a problem of centering the antenna 110 and the test body 30.

The test system 100 according to one embodiment includes a plurality of antennas 111, 112, 113 and 114 on a mast table 120 and a plurality of antennas 111, 112 and 113 , 114) and the test body (30).

3 is a view showing a plurality of antennas positioned on a mast table and a mast table.

Referring to FIG. 3, a plurality of antennas 111, 112, 113, and 114 for transmitting radio waves of different bands are arranged to transmit radio waves in a first direction Z.

The mast table 120 moves the plurality of antennas 111, 112, 113, and 114 in the second direction X and the third direction Y to center the antenna 110 and the test body 30 .

Referring to FIG. 3, the mast table 120 includes a first plate 310, a second plate 320, and a support table 322.

The first plate 310 forms a plane perpendicular to the first direction Z and fixes the plurality of antennas 111, 112, 113 and 114 in this plane.

The second plate 320 supports the first plate 310 and moves the first plate 310 in a second direction X perpendicular to the first direction Z. [ Since the plurality of antennas 111, 112, 113 and 114 are fixed to the first plate 310, the plurality of antennas 111, 112, 113, and 114 are moved together with the movement of the first plate 310 do.

The second plate 320 may be provided with a rail 312 arranged in the second direction X. [ The first plate 310 can then move along these rails 312.

The support table 322 supports the second plate 320 and moves the second plate 320 in a third direction Y perpendicular to the first direction Z and the second direction X. [ Since the second plate 320 supports the first plate 310 and the plurality of antennas 111, 112, 113, and 114 are located on the first plate 310, The plurality of antennas 111, 112, 113, and 114 also move in the third direction Y in accordance with the movement in the Y direction.

The plurality of antennas 111, 112, 113, and 114 can freely change positions in a plane perpendicular to the first direction Z in accordance with the movement of the first plate 310 and the second plate 320.

Since the first direction Z is the direction in which the radio wave is transmitted from the antenna 110, if the position on the plane perpendicular to the first direction Z is changed, the center of the antenna 110 and the specimen 30 are aligned .

4 is a diagram showing the center point of the first plate and the center point of each antenna.

The first plate 310 has a center point P0 and each of the antennas 111, 112, 113, and 114 may be spaced apart from the center point by a predetermined coordinate value. At this time, the respective coordinate values P1, P2, P3, and P4 may be stored in advance in the main controller 170 or may be stored in advance in the master controller 160.

The main controller 170 or the mast controller 160 moves the mast table 120 according to each of the coordinate values P1, P2, P3 and P4 stored in advance, And the center of the test body 30 can be aligned.

The center point P0 of the first plate 310 may be aligned with the center of the specimen 30 in the initial mode. In addition, one of the coordinates (P1, P2, P3, P4) may be aligned with the center of the test body 30. In this case, it is preferable that the coordinates corresponding to the antenna for transmitting the first signal are aligned with the center of the test body 30.

The mast table 120 can move a plurality of antennas 111, 112, 113, and 114 using a device capable of precise position control such as a DC motor. However, when the time is accumulated, the error of the moved position may be accumulated.

The mast table 120 may further include a reference point recognition sensor for eliminating an accumulated error in the position movement.

5 is a view showing a reference point recognition sensor in a second direction.

Referring to FIG. 5, a reference hole 510 corresponding to the center point P0 of the first plate 310 may be positioned on the lower edge of the first plate 310. As shown in FIG.

The second plate 320 may be provided with first position sensors 521 and 522 for recognizing the reference holes 510.

The first position sensors 521 and 522 may be comprised of a sensor signal generator 521 located at one side of the first plate 310 and a sensor signal receiver 522 located at the other side of the first plate 310 . The signal transmitted from the sensor signal generator 521 is blocked by the first plate 310 so that the signal is transmitted to the sensor signal receiver 522. In the case where the first plate 310 is out of the reference point in the second direction X, It does not. When the first plate 310 is positioned at the reference point in the second direction X, the signal transmitted from the sensor signal generator 521 may be transmitted to the sensor signal receiver 522 through the reference hole 510 have. When the sensor signal receiver 522 receives the signal, the main controller 170 or the master controller 160 can set the corresponding position to the reference position in the second direction X. [

6 is a view showing a reference point recognition sensor in a third direction.

6, the support base 322 includes a lower support base 610 disposed in a third direction Y and an upper support base 620 moving in a third direction Y through an inner space of the lower support base 610. [ . &Lt; / RTI >

A second position sensor 630 for sensing the position of the upper support table 620 may be located in the lower support table 610.

The second position sensor 630 may be a sensor operated in the same manner as the first position sensor 521, 522 described with reference to Fig. For example, when the second position sensor 630 is positioned in a manner that the hole is located on the upper support table 620 and the sensor signal generator and the sensor signal receiver are positioned on the lower support table 610 to sense the position of the hole of the upper support table 620 Can be operated. On the other hand, the second position sensor 630 can be operated in a switch manner. For example, when the upper support table 620 moves and the switch included in the second position sensor 630 is touched, the second position sensor 630 may recognize the reference position of the upper support table 620.

A first propeller 640 for moving the upper support table 620 in the third direction Y may be disposed in the lower support table 610. This first propeller 640 may be operated hydraulically or in a DC motor manner.

The first propeller 640 according to the example of FIG. 6 functions to push up and down the upper support 620 supporting the second plate 320 directly in the third direction. However, the supporting table 322 may be a structure that pushes up or down the second plate 320 in other ways.

Figure 7 is a view of another exemplary impeller moving the second plate in a third direction.

7, the support 322 may include a first support 722a and a second support 722b that intersect with each other with respect to the rotation point 723.

The support base 322 may also include a second propeller 724 that pushes or pulls a point of the first support platform 722a in a second direction X. [

The second propeller 724 pushes or pulls one point of the first support 722a in the second direction X at this time because the first support 722a rotates about the rotation point 723, The second plate 320 supported by the one support table 722a is moved up or down in the third direction Y. [

2 to 7, the external configuration of the test system 100 according to one embodiment has been mainly described. Hereinafter, the control of the test system 100 will be described with reference to FIG.

8 is a diagram showing a control flow of the test system for the first band of the test bands.

First, the test system 100 can adjust the origin of the mast table 120 (S800). The origin adjustment can be adjusted by the reference point setting method in the second direction X and the third direction Y described with reference to FIGS. According to the embodiment, this origin adjustment step (S800) may be omitted.

The test system 100 may divide the test band into a plurality of bands and test the test body 30 sequentially for each band. For example, when the test band is divided into the first to fourth bands, the test system 100 first tests the test body 30 for the first band, then the second band, the third band, The fourth band can be tested sequentially.

One antenna 110 may correspond to each of the divided bands. For example, when the test system 100 includes four antennas 111, 112, 113 and 114, each of the antennas 111, 112, 113 and 114 may correspond to a separated band. For example, the first antenna 111 transmits a radio wave of a first band, the second antenna 112 transmits a radio wave of a second band, and the third antenna 113 transmits a radio wave of a third band And the fourth antenna 114 transmits the radio wave of the fourth band.

The test system 100 can sequentially test the test piece 30 for each band. Referring to FIG. 8, a process of testing the test piece 30 with respect to the first band will be described. When this process is completed for the first band, the same process can be sequentially performed for the second band, the third band, and the fourth band.

Referring to FIG. 8, the test system 100, particularly the main controller 170, controls the switch box 130 with respect to a selected first band among a plurality of bands to transmit the first antenna 111 corresponding to the first band And is connected to the first signal amplifier 140 (S802).

When the switch box 130 selects and connects the first antenna 111 corresponding to the first band to the first signal amplifier 140, the other antennas 112, 113, and 114 may be in a floating state (S804). The floating state refers to a state in which the first antenna 111 is not connected to ground or a specific voltage source. In order to prevent the signal transmitted from the first antenna 111 from being absorbed by the adjacent antennas 112, 113 and 114, , 113 and 114 can be floated.

The main controller 170 controls the mast table 120 to match the center of the first antenna 111 with the center of the test body 30 (S806). At this time, the structure of the mast table 120 described with reference to FIG. 3 can be applied.

When the center of the first antenna 111 is aligned with the center of the test body 30 and the first antenna 111 and the first signal amplifier 140 are connected through the switch box 130, The power supplied to the mast table 120 may be shut off to block the ambient noise from affecting the test body 30 at step S808.

The power supply to the mast table 120 is cut off, and the main controller 170 controls the signal generator 150 to transmit a signal corresponding to the first band (S810).

This signal is received by the test body 30. The main controller 170 receives and stores the analysis signal for the first band received through the signal analyzer 50 and displays it on the display device (S812) .

When this process is completed for the first band, the test system 100 can sequentially apply steps S802 to S812 for the second band, the third band, and the fourth band.

The embodiment of the present invention has been described above. According to this embodiment, in a system for testing a test body (a receiving body) using a plurality of antennas, the test is performed while the antennas are automatically replaced without manually changing the antennas.

It is to be understood that the terms "comprises", "comprising", or "having" as used in the foregoing description mean that the constituent element can be implanted unless specifically stated to the contrary, But should be construed as further including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims

A plurality of antennas arranged to transmit radio waves in a first direction and to transmit radio waves of different bands;
A mast table supporting the antenna and moving the antenna on a plane perpendicular to the first direction;
A signal generator for generating a signal to be transmitted from the antenna;
A first signal amplifier for amplifying a signal generated by the signal generator;
A switch box for selectively connecting one of the plurality of antennas to the first signal amplifier;
A mast controller for controlling movement of the mast table;
A test body for receiving a signal transmitted from the antenna;
A second signal amplifier for amplifying a signal received from the test body;
A signal analyzer for analyzing a signal amplified by the second signal amplifier; And
The test band is divided into a plurality of bands and the switch box is controlled with respect to the selected first band among the plurality of bands to connect the first antenna corresponding to the first band to the first signal amplifier, To transmit the signal corresponding to the first band by controlling the signal generator and to transmit an analysis signal for the first band received through the signal analyzer to the display device And a main controller for displaying,
The mast table includes:
A first plate which forms a plane perpendicular to the first direction and in which the plurality of antennas are fixed;
A second plate supporting the first plate and moving the first plate in a second direction perpendicular to the first direction; And
A second plate supporting the second plate and moving the second plate in a third direction perpendicular to the first direction and the second direction,
The multi-antenna test system comprising:

delete

The method according to claim 1,
A hole corresponding to the center point of the first plate is positioned on the lower edge of the first plate,
And a first position sensor for recognizing the hole is located on the second plate.

The method according to claim 1,
The support includes:
A lower support disposed in the third direction;
An upper support moving in the third direction through an inner space of the lower support;
A second position sensor for sensing a position of the upper support,
The multi-antenna test system comprising:

The method according to claim 1,
The support includes:
A first support and a second support which intersect with each other with respect to the rotation point; And
And a propeller for pushing or pulling one point of the first support in the second direction,
And the second plate moves in the third direction by the second movement of the first support about the rotation point.

The method according to claim 1,
Wherein the second plate is provided with a rail arranged in the second direction,
Wherein the first plate moves along the rail.

The method according to claim 1,
The main controller includes:
Wherein the power supply to the mast table is shut off when the signal generator is controlled to transmit a signal corresponding to the first band.

The method according to claim 1,
The switch box includes:
And when the first antenna is connected to the first signal amplifier, the other antenna floats.