KR20010000010A - The mini shield room - Google Patents

Abstract

PURPOSE: A mini electromagnet wave shield room is provided to have a space application of a shield room, light feature, a moving feature, and a convenience and quickness of a measuring operation while performing all function of an electromagnet wave shield room. CONSTITUTION: A metal smaller chamber(100) includes an upper plate, a lower plate, and left and right side plates which have a volume suitable to install a measured article(EUT) installing jig(500) and a measured article(EUT) therein. A shield door(300) is installed at a front surface of the metal smaller chamber(100) and includes a waveguide having a three continuous structures of an enough size to observe and control the measured article(EUT). An appendage room is located under the metal smaller chamber(100). A cable, a solenoid valve, and other appendages are installed in the appendage room. A filter(204) removes a signal and power which input to the metal smaller chamber(100) and output to an outside. An air cylinder(400) opens and closes the shield door(300) by an air pressure. A jig(500) is installed in the metal smaller chamber(100) and mounts the measured article(EUT). A jig pin is installed at the jig(500) and detects a signal of the measured article(EUT).

Description

Mini electromagnetic shielding room {The mini shield room}

The present invention is to provide a small shield room (mini shield room) that provides the inside and outside shielding space required for mass production, inspection, and repair of wireless pager, cellular phone (cellular, PCS), radio, theft alarm, cordless telephone, etc. It is about.

In the development and production of the small RF product, performance tests such as signal sensitivity are generally performed in an electromagnetic shielding room.

The shield room is also called an anechoic chamber. It is a facility used for performance test such as EMI / EMS measurement or signal sensitivity of various wireless equipments. A radio wave infinite free space with very little leakage of radio waves inside the shielded room to the outside, and is a closed chamber whose radio wave influence value is equivalent to that of an open site.

The electromagnetic shielding room used in the development and production line of small RF products such as mobile phone terminals is a large hexahedron room made of metal having a volume of about 4 cubic meters, and is installed inside or outside the building, where the worker is sealed. Although it was possible to perform various performance tests under the lighting installed in the room, there were the following problems. First, there are many problems in terms of convenience, economy and efficiency due to excessive volume, taking up a lot of work space, being too heavy to move, expensive to install, complicated measurement procedures, and difficult to maintain. In particular, this problem can be easily understood by considering the reality that many large electromagnetic shielding rooms must be installed in production lines such as terminals. Second, there was a problem that the worker is exposed to the harmful electromagnetic waves to enter the shielded room to work. As the frequency band increases, this can become a serious problem. Third, appropriate lighting must be installed inside the shielded room in order to inspect and adjust the EUT while the operator enters an enclosed room, which is connected to the power line of an external commercial power source. And there is a corner that can generate a reflected wave around the reflector has a problem of destroying the internal uniformity, causing unwanted external electromagnetic waves intrusion or leakage of internal electromagnetic waves. Fourth, all the connectors passing through the electromagnetic shielding chamber have to go through a filter. In the large electromagnetic shielding chamber, the filter is installed inside the chamber, and the internal electric field is distorted, thereby causing an error in measurement values.

Therefore, there is an urgent need to develop an electromagnetic shielding space that solves problems such as size, cost, risk, and fixability of a conventional shielding room, and enables a user to conveniently perform performance tests of a mobile phone terminal.

The object of the present invention in consideration of this point is a shielding space for performance testing at the stage of development and production of small RF products such as mobile phones, while performing all the functions of the conventional large-scale electromagnetic shielding room while utilizing the space utilization and lightness of the shielding room. To provide a mini-electromagnetic shielding room with all the mobility, convenience, and convenience of measurement.

1 is a perspective view of a mini electromagnetic shielding room according to an embodiment of the present invention,

2 is a perspective view in a state where the shield door of the mini electromagnetic shielding room according to an embodiment of the present invention,

Figure 3 is an exploded perspective view (internal wiring not shown) of the mini-electromagnetic shielding room according to an embodiment of the present invention,

Figure 4 is an exploded perspective view of the small chamber 100 of the mini-electromagnetic shielding room according to an embodiment of the present invention,

Figure 5 (a) is an exploded perspective view of the adjustment tool to be installed in the shield door of the mini-electromagnetic shielding room according to an embodiment of the present invention,

Figure 5 (b) is a front cross-sectional view of the adjustment tool to be installed in the shield door of the mini-electromagnetic shielding room according to an embodiment of the present invention,

Figure 5 (c) is a plan view of the first stage waveguide structure formed on the lower door of the shield door or the adjustment sphere of the mini-electromagnetic shielding room according to the present invention,

Figure 5 (d) is a plan view of a second stage waveguide structure formed in the adjustment sphere of the mini-electromagnetic shielding room according to the present invention,

Figure 5 (e) is a plan view of a third stage waveguide structure formed in the adjustment sphere of the mini-electromagnetic shielding room according to the present invention,

FIG. 6 (a) is a perspective view of a jig frame and a jig plate of a jig installed inside the mini-electromagnetic shielding room according to an embodiment of the present invention to seat an EUT; FIG.

6 (b) is a perspective view showing that the object to be measured on the jig of the mini-electromagnetic shielding room according to an embodiment of the present invention,

Figure 6 (c) is a perspective view seen from the back of the jig to be installed in the interior of the mini-electromagnetic shielding room according to an embodiment of the present invention to seat the EUT;

6 (d) is a front view plan view and a side view of a jig plate which is a part of a jig that is installed inside the mini-electromagnetic shielding room according to an embodiment of the present invention to seat the EUT.

7 is a wiring diagram of a mini electromagnetic shielding room according to an embodiment of the present invention,

8 (a) is a day measurement system diagram using a mini electromagnetic shielding room according to an embodiment of the present invention,

8 (b) is a measurement system diagram using a mini electromagnetic shielding room and an external control pad according to an embodiment of the present invention,

8 (c) shows a measurement system diagram using a mini electromagnetic shielding room, an external control pad, and an external twin EUT according to one embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

DESCRIPTION OF SYMBOLS 100: Small chamber 101: Small chamber top plate 102: Small chamber right side plate 103: Small chamber left side plate 104: Small chamber back plate 105: Small chamber bottom plate

106: filter fixing screw hole 107: small chamber D-Sub connector 108: shield door fixing screw hole 109: RF connector fixing groove 110: air cylinder fixing screw hole 111: shield door fixing hinge 112: RF connector 113: shield door sealing groove 114: sealing metal piece

115: small chamber version surface projection 200: accessory chamber 201: filter D-Sub connector

202: ENTER / ESC D-Sub connector 203: Attachment compartment bottom plate 204: Filter

205: Filter D-Sub connector 206: ESC switch 207: ENTER switch

208: front D-Sub connector 209: air cylinder switch 210: air cylinder switch 211: rear D-Sub connector 300: shield door 301: shield door protrusion

302: shielding hinge 303: first waveguide 304: air cylinder latch 350: adjustment mechanism 351: adjustment lower plate 352: adjustment upper plate

A: waveguide of the first stage B: waveguide of the second stage C: waveguide of the third stage

400: air cylinder 401: check valve 402: air cylinder fixing bolt 403: air cylinder latch 404: solenoid valve 405: down air hose connector 406: up air hose connector 407: main air connector 500: jig

501: jig D-Sub connector 502: jig RF connector 503: power supply pin

504: jig pin 505: jig plate adjustment bolt 506: measuring object holder

507: jig frame 508: jig plate 509: measuring object guide 510: light emitting diode 511: jig plate adjustment bolt hole 513: jig plate

514: reflector 515: reflector adjusting device 516: reflector adjusting bolt

As mentioned above, the present invention relates to a mini-electromagnetic shielding room that can simplify their performance test under an electromagnetic shielding environment in a development and production line such as a mobile pager terminal.

The present invention is a metal material consisting of the upper plate 101, the lower plate 105, the left and right plates 102, 103 and the back plate 105 having an inner space suitable for installing therein the jig 500 on which the EUT is mounted. Small chamber 100 of the; and the shielding door 300 and the waveguide is installed in the front of the small chamber 100 and the size of the waveguide of sufficient size to observe and adjust the EUT from the outside continuously formed in a three-stage structure and ; The subsidiary chamber 200 located below the small chamber 100 to install a cable, a solenoid valve, and other ancillary devices; and a filter 204 for removing noise of signals and power input and output to the outside and the small chamber 100. )Wow; An air cylinder 400 installed to open and close the shield door 300 by air pressure; A jig 500 installed in the small chamber 100 to seat an object to be measured (EUT); It is characterized in that it comprises a jig pin 504 is installed on the jig 500 to detect the signal of the object to be measured (EUT).

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

1 is a perspective view of the mini-electromagnetic shielding room according to an embodiment of the present invention, Figure 2 is a perspective view of the mini-electromagnetic shielding room according to an embodiment of the present invention in the open door, Figure 3 is a present invention 5 is an exploded perspective view of the mini-electromagnetic shielding chamber according to an embodiment of the present invention. FIG. 4 is an exploded perspective view of the small chamber 100 of the mini-electromagnetic shielding chamber according to the embodiment of the present invention. a) is an exploded perspective view of an adjustment tool to be installed on the shield door of the mini-electromagnetic shielding room according to an embodiment of the present invention, Figure 5 (b) is installed on the shielding door of the mini-electromagnetic shielding room according to an embodiment of the present invention Figure 5 (c) is a plan view of the first stage waveguide structure formed in the shield door or the lower plate of the control panel of the mini-electromagnetic shielding room according to the present invention, Figure 5 (d) is a mini-electromagnetic wave according to the present invention Plan view of a second-stage waveguide structure formed in the adjustment opening of the shielded chamber Figure 5 (e) is a plan view of the third stage waveguide structure formed in the adjustment hole of the mini-electromagnetic shielding room according to the present invention, Figure 6 (a) is installed inside the mini-electromagnetic shielding room according to an embodiment of the present invention FIG. 6 (b) is a perspective view illustrating a jig frame and a jig plate of a jig for mounting an object to be measured (EUT). FIG. 6 (b) shows the object to be mounted on the jig of the mini-electromagnetic shielding room according to an embodiment of the present invention. 6 (c) is a perspective view seen from the back of the jig that is installed inside the mini-electromagnetic shielding room according to an embodiment of the present invention to seat the EUT. 7 is a front view plan view and a side view of a jig plate which is a part of a jig that is installed inside the mini-electromagnetic shielding room according to an embodiment of the present invention to seat an EUT. FIG. 7 is an embodiment of the present invention. 8A is a schematic diagram of a mini-electromagnetic shielding room according to an embodiment of the present invention. 8 (b) is a measurement system diagram using a mini electromagnetic shielding room and an external control pad according to an embodiment of the present invention, Figure 8 (c) is a present invention The measurement system diagram using the mini electromagnetic shielding room, the external control pad, and the external twin EUT according to one embodiment of the present invention are shown, respectively.

In Figure 1, the small chamber 100 is shown in an exploded perspective view of Figure 4, jig 350 for mounting the EUT inside the electronic shielding room (not shown), which was previously tested by the operator. ) And the EUT are reduced to a volume that can be properly installed, and the upper plate (101 in FIG. 4), the left and right side plates (102 and 103 in FIG. 4), and the back plate (Fig. 4) made of a conductive metal such as copper and aluminum. 4 and 104) and a lower plate (105 in FIG. 4), and as shown in FIG. 2, a shield door contact groove (113 and 113 in FIG. 4, three knife-shaped protrusions 301 are formed at the inner edge of the shielded door. The close contact groove 113 is the upper plate 101, the lower plate 105 of the small chamber 100 so that the protrusion of the center of the three knife-shaped protrusions (301 of Figure 2) formed in the shielding door 300 in close contact And a front surface of the left and right side plates 102 and 103, as shown in FIG. 4, and as shown in FIG. 2, the inner side of the contact groove 113 has a metal piece 114 having a relatively high elasticity and hardness equal to beryllium in order to increase the shielding effect of electromagnetic waves. Finger Stock) is also installed and fixed symmetrically at narrow intervals. When the shield door 300 is closed, a protrusion formed at the center of the three protrusions 301 of the shield door 300 is inserted into the close groove 113 as described above, and the inside and outside protrusions 115 of the close groove are shielded doors. It is inserted into the space between the three protrusions formed in the can be combined to overlap. In addition, the front surface of the upper plate 101, the lower plate 105 and the left and right side plates (102, 103) in which the shielding door 300 is formed in close contact is inclined about 45 degrees from the side, which is the shielding door 300 is closed In order to be able to perform the measurement work while the operator is easily observing the inside by sitting down the shield door 300 in the forward direction. As shown in FIG. 4, a screw hole 108 is formed in the front of the outer surface of the upper surface of the small chamber 100 so that the shielding door 300 can be fixedly installed by screws, and the screw is also provided on the lower side of the left plate 103. The hole 110 is formed so that the air cylinder 400 for opening and closing the shielding door 300 can be installed. An RF connector fixing groove 109 is formed in the back plate 104 of the small chamber 100, and a groove for a connector to be connected to the accessory chamber 200 is formed in the lower plate 105, and a D-Sub connector is formed. 107 is combined. The D-Sub connector 107 sends out a detection signal of the EUT to the outside of the small chamber 100 or receives an external control signal and power. A plurality of grooves 106 are formed around the D-Sub connector 107 of the lower plate 105, which grooves the connector filter 204 installed in the excrement chamber 200 formed under the small chamber 100. Screw holes for fixing. During measurement, an EUT seating jig 500 is placed on the lower plate 105 of the small chamber 100, and the D-Sub connector 107 of the lower plate 105 and the inside of the EUT. The D-Sub connector 501 of the wearing jig 500 is connected, and if the RF signal input is required, the RF connector 112 and the RF connector 112 to be installed and fixed in the RF connector fixing groove 109 of the back plate 104 are The RF connector 502 of the mounting target jig 500 is connected. In the jig 500, a jig pin 504 connected to each terminal of the D-Sub connector 501 and a terminal of the RF connector 502 may contact the signal input and the signal detection terminal of the EUT. When the object is mounted on the jig 500, the signal input and signal detection terminals are automatically connected to the terminals of the corresponding D-Sub connector 501 and the RF connector 502.

As described above, the mounting chamber (EUT) mounting jig 500 is installed in the small chamber 100 so that the measurement target (EUT) can be mounted and the measurement work can be performed. EUT guide 509 for easy installation of EUT, EUT holder 506 for fixing the installed EUT, At least one jig pin 504 for inputting a signal to the EUT or detecting a signal from each terminal of the EUT and an EUT for supplying power to the EUT. ) A power supply pin 503, the jig pin 504 and the power supply pin is connected to any one of the D-Sub connector 501 and the jig pin 504 for signal and power transmission with the outside; An RF connector 502 connected to transmit an RF signal to the EUT, and the EUT guide 509 EUT holder 50. 6) Jig pin 504 EUT power supply pin 503 D-Sub connector 501 Jig plate 508 including all the RF connector 502 and the EUT to be measured and It is composed of a jig frame 507 for supporting the jig plate to be inclined about 45 degrees from the side and horizontal to the shielding door. The jig plate 508 is made of an insulating material and the EUT guide 509 not only makes it easy to seat the EUT as described above, but also the EUT. It is possible to accurately contact the measurement signal terminal of the) and the corresponding jig pin. The position of the jig pin or the EUT power supply pin may vary depending on the type of the EUT. The jig plate 508 is adapted to the position of the detection terminal of the EUT to be measured. Jig pins, etc., can be used to install jig pins. In general, a PCB such as a mobile phone terminal is equipped with a display device such as an LCD on the opposite side where the device is installed, and it is necessary to see the data displayed on the display device during measurement. Reflector for viewing the display device of the LCD, etc. installed on the back of the measurement object (EUT) and reflector adjusting device for attaching the reflector to the jig plate to move up and down and left and right, and the adjustment bolt and the LCD through the reflector A small LED emitter is provided that provides the necessary light source for easy visual identification of the data displayed on the display. The small LED light emitter is installed to enable the position control on the jig plate, and the power of the LED is configured by installing a jig pin to use the power of the EUT. The jig plate 508 is detachable from the jig frame 507 by the jig plate adjusting bolt 505. However, when the position of the jig pin is changed by changing the EUT, the existing jig plate 508 is removed and the jig plate 508 having the jig pins installed in accordance with the position of the detection terminal of the new EUT is fixed to the jig frame using the adjusting bolt 505 as described above. You can do it. The jig plate 508 is made to allow some movement in up, down, left and right by making the jig plate adjustment bolt hole 511 large enough to fix it, so as to adjust, inspect, and signal the EUT mounted on the jig plate. In addition, the sensitivity test can be performed flexibly.

In the front of the small chamber 100, as shown in FIG. 3, the shielding door 300 is connected to the upper plate 101 of the small chamber 100 by a hinge 302 so that it can be opened and closed while rotating up and down. In the closed door 300, the performance test is performed. The material of the shielding door 300 uses the same material as the material of the small chamber 100 in consideration of the shielding effect of the electromagnetic wave. In the state in which the shielding door 300 is closed, the inner side of the shielding door 300 comes into contact with the shielding door 300 of the small chamber 100 and the close contact groove 113 and the knife-shaped protrusion 115 around the contacting groove. As described above, three knife-shaped protrusions are formed at the inner edge of the shielding door 300 such that the contact portion overlaps the shielding door tight groove 113 and the protrusion 115 so that the shielding door 300 is closed. The protrusion at the center is sandwiched between the sealing metal pieces 114 of the close contact groove of the shielding door 300 to minimize electromagnetic wave penetration or leakage between the door gaps of the shielding door 300. In the middle of the shielding door 300, a relatively large three-stage continuous waveguide 303 is formed. In the separation diagram of FIG. 3, first, a waveguide of the first stage is formed in the shielding door 300, and the rest of the first adjustment pipe 350 is formed. The structure in which the waveguides of the second and third stages are formed and combined is shown as an example. However, as a method of forming the waveguide of the above structure, the lower plate (351 in FIG. 5A), the second stage (B in FIG. 5B), and the third stage (FIG. 5B), which form the waveguide of the first stage (A in FIG. 5B), are formed. After coupling the upper plate (352 of FIG. 5A) in which the waveguide of C) is formed, there may be various methods such as installing the shielding plate 300 again. Fig. 5C shows a possible planar structure of the first waveguide, 5d shows a possible plane structure of the second waveguide, and 5e shows a possible plane structure of the third waveguide. As can be seen in the figure, the waveguide formed in the shielding door 300 has a different structure for each end, but is continuously formed. The waveguides of the three stages are all formed of the same metallic material and are large enough to easily observe and adjust the EUT. The total thickness of the waveguide is to be a thickness that can sufficiently exhibit the electromagnetic shielding effect, but is determined to an appropriate thickness in consideration of the width of the waveguide of the third stage. The waveguide utilizes an exponential electromagnetic wave attenuation effect below the cutoff frequency of the waveguide. That is, an electromagnetic wave having a wavelength more than twice the width of the waveguide exhibits an exponential decay phenomenon in the waveguide. For example, if the waveguide has a width of 5 cm, the cutoff frequency is generated at about 3 GHz, and the frequency of the invading or leaking electromagnetic wave is about 1/3 times the frequency, that is, at 1 GHz or less, it corresponds to about 32 times the height ratio to the width of the waveguide. It shows the attenuation dB which is excellent, showing the excellent electromagnetic shielding effect. The waveguide of the present invention utilizes these waveguide characteristics. According to the present invention having three waveguides and a different structure for each waveguide, there is an effect of reducing the waveguide width as a whole, and the triple waveguide shielding effect is shown, so that the waveguide shielding effect of around 105 dB at a broadband frequency is shown. Can be obtained. In the case of forming a waveguide having a three-stage structure as described above, a relatively large adjusting device can be secured even in a high frequency band, so that the measurement operator can measure the EUT as in the large shielded room even outside the small chamber 100. The test can be performed while freely adjusting observation.

The shielding door 300 may be opened and closed manually, but in the present invention, the air cylinder 400 is fixed to the sides of the shielding door 300 and the small chamber 100 to improve the convenience and speed of the measurement operation. The shield door 300 was to be opened and closed. A screw hole for attaching the shielding door 300 opening and closing cylinder is formed at the edge of the shielding door 300. The one end of the air cylinder is connected to the screw hole, and the other end of the air cylinder 400 is a small chamber ( 100) to open and close the shield door 300 by the air pressure. The air used here is very convenient because it can be used by connecting the air of the air compressor (not shown) widely used in the measurement work site. When the air cylinder 400 is installed and opened as in the present invention, in addition to the above-mentioned convenience or speed effect, the air cylinder 400 has an additional effect of reliably preventing opening or leakage of electromagnetic waves through the shield door gap.

An ancillary chamber 200 is installed below the small chamber 100. Hereinafter, the ancillary chamber 200 will be described with reference to FIG. 3. The accessory chamber 200 is a rack containing equipment necessary for the small chamber 100 to perform its functions, including a filter 204, a solenoid valve 404, an air hose (not shown) and a cable. (Not shown) is stored. The filter 204 is required for all signals or power input / output connectors connected to the electromagnetic shielding chamber to remove noise, but conventionally, the connector filter 204 is installed inside the shielding chamber to affect an internal electric field. Since it was a cause of lowering the accuracy of the sensitivity measurement of the terminal, such as by installing it in the separate chamber 200 of the bottom of the chamber without installing it in the small chamber (100). The solenoid valve 404 is connected to the air cylinder 400 used to open and close the shield door 300, the air hose (not shown) is for the passage of air, the cable (not shown) is the required power or signal In the accessory room 200, switches (206 and 207) for inputting a start (ENTER) and a stop (ESC) signal of a test program, such as a measuring instrument or a computer, to be used in connection with a mini-electromagnetic shielding room according to the present invention during an automatic test. Is installed. This is to save the space occupied by the keyboard, so that the automatic test can be conveniently performed even in a narrow space.

An embodiment of a measurement operation according to the present invention will be described with reference to the accompanying drawings.

First, the internal wiring and signal and power flow of the mini-electromagnetic shielding room according to the present invention will be described with reference to the accompanying drawings. Figure 7 shows the internal connection diagram of the mini-electromagnetic shielding room according to the present invention. In FIG. 7, the jig D-Sub connector 501 is connected to a jig pin 504 and an EUT power supply pin 503 for detecting various signals by a cable, and the front D-Sub connector 208 ) Is connected to the control pad or twin EUT when the test is performed by installing a control pad or twin EUT externally, as shown in FIG. 8B or 8C. The rear D-Sub connector 211 of FIG. 7 is connected to a measurement device including a power supply or a monitor device such as an audio device to supply power required for the EUT and to be measured at the same time. Signal is detected and displayed by measurement equipment such as an oscilloscope or digital analyzer, or an audio signal of an object under test (EUT) is detected and can be heard through a speaker or the like. Jig pin 504 of the jig plate 508. ) And the cable of the EUT power supply pin 503 are connected to the D-Sub connector 502 of the jig and the D-Sub connector 502 of the jig is connected to the lower D-Sub connector 107 of the chamber. Connected to the filter 204 through the signal 204 is branched to the front D-Sub connector 208 and the rear D-Sub connector is wired to input and output signals of the terminal required by the external equipment have. 8A shows a system diagram of the most basic measurement using the present invention. First, the shield door 300 is opened using the air cylinder switch 209, and then the object to be measured EUT is seated on the jig 500, and the shield door 300 is closed using the air cylinder switch 210 again. Input via the signal generator through the signal RF connector 112, and through the monitor of the oscilloscope, such as changing the resistance, band frequency, etc. of the EUT through the adjustment of the shielding door (300) Test the signal sensitivity of the EUT. The PCB of a mobile phone terminal having a display device such as an LCD is generally located on the back of the PCB where the display device such as the LCD is located so that the operator cannot see data values displayed on the display device during the test. According to the present invention, as described above, the jig plate is made of a transparent non-conductor and a reflector and an LED are installed at the rear part of the jig plate so that the operator can see the display contents of the LCD display device through the adjusting mechanism. FIG. 8B is a measurement system for connecting a terminal for changing a channel mode, etc. of an EUT to an external control pad and testing the channel value of the internal EUT from the outside while changing the channel value; Indicates. The control pad is connected to the jig pin 504 of the jig 500 through the filter 204 through the front D-Sub connector 208 on the front surface of the accessory chamber 200. FIG. 8C shows a measurement system diagram which detects a display signal of an EUT and transmits it to an EUT on another jig installed outside through a control pad. The same as the measured object to be seated and tested, it is configured to be mounted on the jig or directly connected without a jig as shown in FIG. 8C so that the display data value of the internal measured object is input to the display data input terminal. The data value displayed on the display device such as the LCD of the EUT is installed by installing the same EUT as the drawing, which is the same as the EUT being measured inside the small chamber 100. Easily visible without a reflector. The control terminal of the EUT inside the small chamber 100 and the control terminal of the external twin EUT are connected in parallel to the control terminal of the control pad to change the channel value of the control pad. In this case, the channel values of the two EUTs are simultaneously changed.

Not only can you perform all the tests you perform in a shielded room under the same environment as the shielded room, while addressing all conventional enclosure room size, cost, risk, and fixability issues, but also allow operators to observe and adjust the EUT in a comfortable position. The test can be performed quickly while improving convenience and speeding up the measurement.

Claims (19)

In radio wave shielding room, it is necessary to perform adjustment, inspection, signal and sensitivity test for development and production of a wide range of small RF product technologies such as radios, cell phones, pagers, cordless telephones and burglar alarms. Small metal plate consisting of a top plate 101, a bottom plate 105, a left and right side plates 102, 103, and a back plate 105 of a volume suitable for mounting the measurement object (EUT) mounting jig 500 and the EUT. A chamber (100); a shielding door (300) installed in the front of the small chamber (100) and having a waveguide having a continuous three-stage structure of a size sufficient to observe and adjust an EUT; An ancillary chamber 200 located below the chamber 100 and capable of installing cables, solenoid valves, and other ancillary devices; a filter 204 for removing noise of signals and power entering and exiting the outside and the compact chamber 100; An air cylinder 400 installed to open and close the shield door 300 by air pressure; A jig 500 installed in the small chamber 100 to seat an object to be measured (EUT); Miniature electromagnetic shielding room is installed on the jig (500) comprising a jig pin (504) capable of detecting a signal of the EUT. According to claim 1, When the shielding door 300 is closed in order to minimize the leakage or penetration of electromagnetic waves into the shielding door 300, the front of the small chamber 100, the shielding door contact groove 113 and the protrusion ( And forming a metal piece such as beryllium copper, which has relatively high conductivity, elasticity and hardness, on both sides of the groove, in the shielding door contact groove 113, and inside the shielding door 300. Three protrusions 301 are formed at the edges to be in contact with the contact grooves and the protrusions, and the protrusions formed at the center of the three protrusions 301 of the shielding door 300 with the shielding door 300 closed are the small chambers. The protrusions 115 inserted into the shield door tight groove 113 on the front surface and around the shield door tight groove 113 on the front of the small chamber 100 are three protrusions 301 of the edge of the shield door 300. Is inserted into the space between the The electromagnetic wave shielding room. According to claim 1, wherein the shield door contact groove 113 and the protrusion 115 formed on the front surface of the small chamber 100, the lower side at an angle of about 45 degrees when viewed from the side when the shield door 300 is closed Mini electromagnetic shielding room, characterized in that formed to be inclined. According to claim 1, wherein the three-stage waveguide formed in the shielding door 300, first, the waveguide of the first stage is formed in the shielding door 300, the waveguides of the second and third stages in a separate control mechanism The electromagnetic wave shielding room of claim 3, wherein the waveguides of the three stages are formed continuously by forming and coupling the shielding door. According to claim 1, The three-stage waveguide formed in the shielding door 300 is formed in a control unit divided into a top plate and a lower plate separate from the shielding door 300 is formed by coupling to the shielding door 300, The waveguide of the first stage is formed on the lower plate, and the waveguide of the second and third stages is formed on the upper plate. The waveguide of the third stage is different from each other, and the waveguides of the first stage are positioned at the bottom of the waveguide, and the two waveguides of the second stage are formed. It is located in the middle of the first conduit to accommodate all of the first waveguide tube can be formed continuously, and the third waveguide is placed in the upper portion of the second waveguide is continuous At least two waveguides may be formed to have three or more waveguides having a structure in which the three different planar waveguides act in a superimposed manner to enhance the shielding effect of the electromagnetic waves and to secure sufficient observation and adjustment space. Mini electromagnetic shielding room, characterized in that. The method of claim 1, wherein the jig is fixed to the EUT guide and the EUT to help the EUT to be easily seated when the EUT is seated on the jig. A plurality of jig pins installed to directly contact the EUT holder and the terminals of the EUT seated on the jig, and for inputting a signal, a D-Sub connector connected to a part of the jig pin, and the jig The RF connector connected to one of the pins and the D-Sub connector of the jig plate are in direct contact with the power input terminal of the EUT mounted on the jig so as to externally supply power required for the EUT. Jig frame made of insulating material processed to have an inclination of around 45 so as to support the jig plate and the jig plate of the insulating material with a power supply pin connected to it so that the jig plate is kept horizontal with the inclined shielding door 300. Including Mini electromagnetic wave shield room, characterized in that the sex. The jig plate 508 has a relatively large bolt hole 511 and a jig plate adjustment bolt 505 formed on the jig plate, and a screw hole on a jig frame that matches the screw pitch of the jig plate adjustment bolt (not shown). Mini electromagnetic shielding room, characterized in that the detachable to the jig frame (507) and the vertical and horizontal position displacement is possible by the). The mini-electromagnetic shielding room according to claim 7, wherein the jig frame is configured to have mobility without being fixed to the lower plate (105) of the small chamber (100). The method of claim 7, wherein the jig pin is a signal of the EUT immediately after the EUT is seated on the jig plate by the EUT guide and the EUT holder. The jig is formed to protrude in a corresponding position so as to be in direct contact with the terminal, and when the EUT is changed or the position of the signal entry / exit terminal is changed, a hole is formed in the jig plate corresponding to the changed contact terminal position. Mini electromagnetic shielding room, characterized in that the pin is installed to protrude fixed. 8. The jig plate of claim 7, wherein the jig plate is capable of moving the reflector up and down, left and right, and a reflector for viewing a display device such as an LCD mounted on a rear surface of an EUT seated on the jig plate at a rear portion of the jig plate. And a small LED light emitting body providing a light source necessary for visually identifying data displayed on the display device such as an LCD through the reflector and the reflector adjusting device attached to the jig plate. Electromagnetic shielding room. 12. The method of claim 11, wherein the small LED emitter is installed on the jig plate to adjust the position and the power of the LED is characterized in that the jig pin is configured to install the power to use the power of the object to be measured (EUT) Mini electromagnetic shielding room. The mini-electromagnetic shielding room according to claim 1, wherein the filter (204) is installed in the accessory chamber (200). According to claim 1, The solenoid valve for the air cylinder 400 for opening and closing the shield door 300 is installed in the accessory chamber 200 is a space isolated from the outside in order to block the noise caused by the incoming and out of the air. Mini electromagnetic shielding room. The method of claim 1, wherein the accessory room 200 is provided with a switch for inputting the start and stop signals of a test program, such as a measuring instrument, a computer, to be used in connection with a mini-electromagnetic shielding room according to the present invention during the automatic test. Mini electromagnetic shielding room. 2. The device of claim 1, further comprising: an EUT seated on the jig; A jig pin and an EUT power supply pin in direct contact with a signal input / output terminal of the EUT; an extension of the jig pin and an EUT power supply pin connected to a D-Sub connector on a jig cable; A cable connecting the D-Sub connector on the jig to the D-Sub connector on the bottom of the small chamber 100; A filter 204 installed in the accessory chamber 200 connected to the D-Sub connector of the lower chamber of the small chamber 100; a front D-Sub connector of the accessory chamber 200 connected to the filter 204 and a rear connector of the accessory chamber 200; And a control pad connected to an extension line of a jig pin in contact with a control terminal such as a channel and a mode of the EUT mounted on the jig. An EUT seated on the jig; A jig pin and an EUT power supply pin in direct contact with a signal input / output terminal of the EUT; an extension of the jig pin and an EUT power supply pin connected to a D-Sub connector on a jig cable; A cable connecting the D-Sub connector on the jig to the D-Sub connector on the bottom of the small chamber 100; A filter 204 installed in the accessory chamber 200 connected to the D-Sub connector of the lower chamber of the small chamber 100; a front D-Sub connector of the accessory chamber 200 connected to the filter 204 and a rear connector of the accessory chamber 200; In the measurement system using a mini-electromagnetic wave according to the present invention comprising a control pad connected to the front connector, the control pad is in contact with a control terminal such as a channel, a mode, etc. of the EUT seated on the jig The extension of the jig pin is connected and the signal, sensitivity, etc. of the RF product while controlling the measurement object (EUT) inside the small chamber (100) from the outside of the small chamber (100) by using the control pad. 2. The device of claim 1, further comprising: an EUT seated on the jig; A jig pin and an EUT power supply pin in direct contact with a signal input / output terminal of the EUT; an extension of the jig pin and an EUT power supply pin connected to a D-Sub connector on a jig cable; A cable connecting the D-Sub connector on the jig to the D-Sub connector on the bottom of the small chamber 100; A filter 204 installed in the accessory chamber 200 connected to the D-Sub connector of the lower chamber of the small chamber 100; a front D-Sub connector of the accessory chamber 200 connected to the filter 204 and a rear connector of the accessory chamber 200; A control pad connected to a control object terminal of the front D-Sub connector; a jig D-Sub connector and a jig D-Sub connected to the control pad and a control terminal and to which the front D-Sub connector and a display data terminal are connected; A mounting jig for mounting an external measurement object including a connector; Mini-electromagnetic shielding room, characterized in that configured to include the same external measuring object (EUT) that is the same as the measuring object (EUT) in the chamber seated on the seat for mounting the external EUT. An EUT seated on the jig; A jig pin and an EUT power supply pin in direct contact with a signal input / output terminal of the EUT; an extension of the jig pin and an EUT power supply pin connected to a D-Sub connector on a jig cable; A cable connecting the D-Sub connector on the jig to the D-Sub connector on the bottom of the small chamber 100; A filter 204 installed in the accessory chamber 200 connected to the D-Sub connector of the lower chamber of the small chamber 100; a front D-Sub connector of the accessory chamber 200 connected to the filter 204 and a rear connector of the accessory chamber 200; A control pad connected to the front connector; an external EUT seating jig connected to the control pad; In the measurement system using the mini-electromagnetic wave according to the present invention comprising the same external measured object (EUT) as the measured object (EUT) in the chamber seated on the seat for mounting the external EUT (EUT), the control An extension line of a jig pin in contact with a control terminal such as a channel and a mode of the internal and external measured object EUT mounted on the inner chamber and the external jig of the small chamber 100 is connected to the pad. The data input terminal of the display device of the LCD, such as the EUT, is connected to the display device input terminal of the LCD, etc. of the EUT to simultaneously control the internal and external objects (EUT) using the control pad. And controlling the signal and the sensitivity of the RF product while observing the data of the LCD display of the internal EUT on the display of the LCD of the external EUT.