KR102541491B1 - Electromagnetic radiation measurement device of wireless terminal - Google Patents

Abstract

The present invention relates to an electromagnetic wave radiation measuring device of a wireless terminal installed inside a chamber in which an electromagnetic wave non-reflection environment is created and measuring radiation characteristics and electromagnetic wave absorption of an antenna of a wireless terminal for 5G communication required by international standards.
The present invention includes a chamber forming a predetermined space in which an absorber molded by adsorbing carbon to a resin such as polyurethane is installed on an inner wall surface; A power feeding antenna and a radio wave reflecting device connected to a radio wave transmitter for transmitting radio waves for testing are installed on one side of the chamber, and a positioner driven by a positioner controller is installed inside the chamber, but the positioner is driven by a first motor in a horizontal direction. a turntable that rotates 360 degrees; In the electromagnetic radiation measuring device configured to include; a jig means for mounting a wireless terminal rotated 360 degrees by a second motor in a vertical direction installed on one side of an upper part of a column on one side of the turntable, the jig means for mounting a wireless terminal 1 a rotating member for connecting a mounting member coupled with a rotating plate installed on the shaft of the motor and a fixing bolt; a mounting member coupled to a fitting protrusion on one side of the rotating member for connecting the mounting member; a plurality of wireless terminal detachable members inserted into a plurality of grooves formed on one side of the mounting member; and an adhesive applied to the entire surface of the detachable member of the wireless terminal, but characterized in that the rotating member for connecting the mounting member, the mounting member, and the detachable member of the wireless terminal can be assembled and separated without assembly bolts.

Description

Electromagnetic radiation measurement device of wireless terminal}

The present invention relates to an electromagnetic wave radiation measuring device of a wireless terminal installed inside a chamber in which an electromagnetic wave non-reflection environment is created and measuring radiation characteristics and electromagnetic wave absorption of an antenna of a wireless terminal for 5G communication required by international standards.

In general, wireless terminals such as cell phones, DMB phones, GPS terminals, and wireless terminals for 5G communication are equipped with antennas for wirelessly receiving radio waves. Such an antenna is a device for wirelessly transmitting and receiving radio waves, and is designed to be optimized to receive a specific frequency band for each device. At this time, the radiation characteristic of the antenna and the specific absorption rate (SAR) are important factors that determine the performance and call quality of the mobile communication terminal.

Although various methods for measuring radiation characteristics and electromagnetic wave absorption of a mobile communication terminal antenna are known, as the most widely used method, an anechoic chamber measurement method has been disclosed. According to the anechoic chamber measurement method, an absorber in which carbon is adsorbed to a resin such as polyurethane is installed on the inner wall of a chamber forming a predetermined space to create an electromagnetic wave non-reflection environment, and when a test radio wave is transmitted from one side inside the chamber, the movement located inside the chamber The antenna radiation characteristics are tested by measuring radio waves received from the antenna of the communication terminal.

At this time, the mobile communication terminal is fixed to the jig inside the chamber, and the jig is moved while being rotated by a rotation means such as a motor. Then, the analysis computer connected to the antenna of the mobile communication terminal measures the antenna radiation characteristics using radio waves received at each positional coordinate of the antenna.

Previously, a jig was used to fix the mobile communication terminal as in Patent Registration No. 10-0767464, which is a prior art, and measured electromagnetic waves by fixing the mobile communication terminal with a fixed band on the jig in consideration of the electromagnetic wave non-reflection environment inside the anechoic chamber. has been performed, but when the mobile communication terminal placed on the jig is fixed with a fixed band and the mobile communication terminal has a 3-dimensional coordinate value while rotating the jig vertically and horizontally, it is fixed according to the weight or position change of the mobile communication terminal There is a concern that the mobile communication terminal may be separated from the band, and since the jig does not absorb radio waves, it is pointed out that precise antenna radiation characteristics cannot be measured.

The present invention provides an electromagnetic wave emission measurement device for a wireless terminal that increases the accuracy of measuring electromagnetic radiation by minimizing radio interference in the surroundings, improves the assemblability of the measuring device, and stably mounts the mobile communication terminal to obtain reliability of the measuring device. making it a technical challenge.

The present invention includes a chamber forming a predetermined space in which an absorber molded by adsorbing carbon or the like to a resin such as polyurethane is installed on an inner wall surface; A power feeding antenna and a radio wave reflecting device connected to a radio wave transmitter for transmitting radio waves for testing are installed on one side of the chamber, and a positioner driven by a positioner controller is installed inside the chamber, but the positioner is driven by a first motor in a horizontal direction. a turntable that rotates 360 degrees; In the electromagnetic radiation measuring device configured to include; a jig means for mounting a wireless terminal rotated 360 degrees by a second motor in a vertical direction installed on one side of an upper part of a column on one side of the turntable, the jig means for mounting a wireless terminal 1 a rotating member for connecting a mounting member coupled with a rotating plate installed on the shaft of the motor and a fixing bolt; a mounting member coupled to a fitting protrusion on one side of the rotating member for connecting the mounting member; a plurality of wireless terminal detachable members inserted into a plurality of grooves formed on one side of the mounting member; and an adhesive applied to the entire surface of the detachable member of the wireless terminal, but characterized in that the rotating member for connecting the mounting member, the mounting member, and the detachable member of the wireless terminal can be assembled and separated without assembly bolts.

The present invention has an effect of reducing measurement work time and providing convenience in replacement work by conveniently attaching and detaching a measurement object by easily attaching and detaching a wireless terminal to be measured.

In addition, the present invention improves the assemblability of the jig means for mounting the wireless terminal, thereby omitting fixing bolts for assembling the positioner, thereby reducing the manufacturing cost of the positioner and reducing the assembly time, thereby providing convenience in installation work. have an effect

In addition, the present invention attaches the wireless terminal in a solid state by the adhesive applied to the front surface of the detachable member for the wireless terminal without radio wave interference, thereby preventing the wireless terminal from being separated even if the jig means for holding the wireless terminal rotates 360 degrees in the vertical and horizontal directions. By doing so, it has an effect of improving the accuracy and reliability of the measurement of electromagnetic radiation in the surroundings.

In addition, the present invention has an effect of providing convenience in use by allowing the wireless terminal to be attached by varying the number of installation detachable members according to the weight of the wireless terminal.

1 is a diagram showing the configuration of a chamber in a state where an electromagnetic wave radiation measuring device of a wireless terminal according to the present invention is installed.
2 is an exploded perspective view of a positioner of an electromagnetic wave radiation measurement device of a wireless terminal according to the present invention viewed from the front.
3 is a perspective view of a positioner of an electromagnetic wave radiation measuring device of a wireless terminal according to the present invention viewed from the rear side.
4 is a perspective view illustrating an example of a state in which a wireless terminal is attached to a jig means for mounting a wireless terminal constituting a positioner of an electromagnetic radiation measuring device of a wireless terminal according to the present invention.
5 is an exemplary cross-sectional view of a state in which a wireless terminal is attached to a jig means for mounting a wireless terminal constituting a positioner of an electromagnetic radiation measuring device of a wireless terminal according to the present invention.
6 is a perspective view of another example of a state in which a wireless terminal is attached to a jig means for mounting a wireless terminal constituting a positioner of an electromagnetic wave radiation measuring device of a wireless terminal according to the present invention.
7 is another exemplary cross-sectional view of a state in which a wireless terminal is attached to a jig means for mounting a wireless terminal constituting a positioner of an electromagnetic radiation measuring device of a wireless terminal according to the present invention.
8 is an exploded perspective view according to another embodiment of a mounting jig means according to the present invention.

The present invention provides an electromagnetic wave emission measuring device of a wireless terminal for measuring radiation characteristics and electromagnetic wave absorption of an antenna of a 5G FR2 (millimeter wave, generally 10 GHz or more) terminal in the international standard 3GPP.

An electromagnetic wave radiation measuring device of a wireless terminal according to the present invention will be described in detail through embodiments of the accompanying drawings.

1 is a diagram showing the configuration of a chamber in a state where an electromagnetic wave radiation measuring device of a wireless terminal according to the present invention is installed.

According to this, a chamber 10 forming a predetermined space in which an absorber 11, which is a radio wave absorber formed by adsorbing carbon or the like to a resin such as polyurethane, is installed on an inner wall surface; On one side inside the chamber 10, a power supply antenna 21 connected to a radio wave transmitter 20 that transmits radio waves for testing and a radio wave reflecting device 30 are installed, and the positioner controller 40 is installed inside the chamber 10. Install a positioner 50 driven by a turntable 52 that rotates 360 degrees by a first motor 51 in a horizontal direction; A jig means 60 for holding a wireless terminal rotated 360 degrees by a second motor 54 in a vertical direction installed on one side of the upper side of the pillar 53 on one side of the turntable 52; 70) can be rotated to have three-dimensional coordinates so that precise antenna radiation characteristics and electromagnetic wave absorption can be measured, and the positioner controller 40 is designed to operate by control manipulation of a personal computer (PC).

Figure 2 is an exploded perspective view of the positioner of the electromagnetic radiation measuring device of the wireless terminal according to the present invention viewed from the front, Figure 3 is a perspective view of the positioner of the electromagnetic radiation measuring device of the wireless terminal according to the present invention seen from the rear, Figure 4 is the present invention 5 is an exemplary perspective view of a state in which a wireless terminal is attached to a jig means for mounting a wireless terminal constituting a positioner of an electromagnetic radiation measuring device of a wireless terminal according to the present invention, FIG. An exemplary cross-sectional view of a state in which a wireless terminal is attached to a jig means for holding a wireless terminal.

According to this, the jig means 60 for mounting the wireless terminal includes a rotating member 61 for connecting a mounting member coupled with a rotating plate 54A installed on the shaft S of the second motor 54 and a fixing bolt 54B. ; A mounting member 62 coupled to a plurality of fitting protrusions 61A on one side of the rotating member 61 for connecting the mounting member; a plurality of wireless terminal detachable members 63 inserted into a plurality of grooves 62A formed on one side of the mounting member 62; and an adhesive 64 or double-sided tape applied to the entire surface of the detachable member 63 of the wireless terminal, wherein the rotating member 61 for connecting the mounting member, the mounting member 62, and the detachable member 63 of the wireless terminal are included. It can be configured to be assembled and disassembled without assembly bolts.

The hole 54A' drilled around the rotation plate 54A installed on the shaft S of the second motor 54 corresponds to the hole 61B drilled in the rotation member 61 for connection, and the fixing bolt 54B ) so that the rotating plate 54A and the rotating member 61 for connection can be firmly coupled, and the rotating member 61 for connecting the mounting member is installed between the rotating plate 54A and the mounting member 62 As the rotating plate 54A rotates 360 degrees vertically, the holding member 62 also rotates 360 degrees vertically, so that the radio wave radiation direction of the power supply antenna 21 connected to the radio wave transmitter 20 is performed. Correspondingly, the electromagnetic radiation measurement accuracy of the wireless terminal 70 can be increased.

The rotating member 61 for connecting the mounting member is MC nylon (monomer) having low permittivity characteristics (dielectric constant 2.0 to 3.0: preferably 2.7) and electrical conductivity (0.15 to 0.25 S/m: preferably 0.2 S/m). casting nylon: high-strength engineering synthetic resin), and in particular, a plurality of fitting protrusions 61A protruding to one side of the rotating member 61 for connection to the holding member are a plurality of fitting holes formed on the other side of the holding member 62. (62B) in a fit-fitting manner so that mutual coupling is easily performed without fixing bolts, so that not only can have quickness and convenience of assembly, but also requires replacement, such as damage to the rotating member 61 for connecting the mounting member. In the case of this, it is possible to provide the convenience of replacement work by making it detachable without auxiliary means such as a screwdriver or wrench.

In addition, the terminal detachable member 63 of the present invention is molded and provided with a high-strength low-loss foam having a dielectric constant close to air and low electrical conductivity, so that when the dielectric constant increases, the amount of radio wave reflection increases, preventing interference due to radio wave cancellation reinforcement. In addition, in order to prevent an increase in electric conductivity from being lost as radio waves pass through when the electrical conductivity increases, making accurate measurement difficult, it may be provided as a high-strength, low-loss foam with low electrical conductivity.

Therefore, the terminal detachable member 63 of the present invention can be molded and provided with a high-strength low-loss foam (trade name: Rohacell) having a very low permittivity (dielectric constant 1.04 or less) and electrical conductivity (electric conductivity 0.01 S/m or less). By allowing radio waves to pass through the terminal detachable member 63, radio waves from the feeding antenna 21 can be radiated to the wireless terminal 70 without obstruction, so that electromagnetic radiation measurement accuracy can be improved.

The holding member 62 is molded and provided with a low permittivity loss foam having a permittivity close to air and a high electrical conductivity over a certain level, thereby reducing the amount of radio wave reflection and eliminating interference due to radio wave cancellation reinforcement. When it is small, the radio wave absorption amount decreases, so that the signal passing through the mounting member 62 and reflected on the composite resin or metal mechanism such as the rotating member 61 for connecting the mounting member on the opposite side can return to the wireless terminal 70. It is necessary to increase electrical conductivity so as to prevent radio wave interference and difficulty in accurate measurement.

Therefore, the mounting member 62 is provided as a radio wave absorber formed of a low dielectric constant loss foam having a low permittivity (permittivity of 1.5 or less) and electrical conductivity (0.30 S/m or more), thereby increasing the accuracy of measuring electromagnetic radiation and having a low permittivity. In addition to electrical conductivity above a certain level, sufficient thickness must be provided according to the frequency wavelength for sufficient attenuation of radio waves. In this case, a thickness of about 30 mm or more is appropriate in the 30 GHz band, and a thickness of about 90 mm in the 10 GHz band depending on the frequency wavelength used. is appropriate, and in order to satisfy the above thickness, the positions of the grooves, etc., should be arranged so that there are no areas where the thickness is reduced due to overlapping each other when viewed from the direction in which radio waves propagate.

In particular, the detachable terminal member 63 formed of the high-strength low-loss foam can be inserted into and fixed to a plurality of grooves 62A formed on one side of the holding member 62, and at this time, the grooves 62A have various shapes. It is formed and provided, but an adhesive or double-sided tape not shown is adhered to the back and circumference of the terminal detachable member 63, and the terminal detachable member 63 is attached by the adhesive while being inserted into the groove 62A It can be maintained, or, if unnecessary, the detachable member 63 of the terminal can be separated from the groove 62A.

That is, the adhesive 64 applied to the front surface of the terminal detachable member 63 inserted into the groove 62A of the holding member 62 or the double-sided tape attached to the back side of the wireless terminal 70 having a light weight and narrow width 4 and 5, the weight is reduced by one or two terminal detachable members 63 inserted into any one or two grooves 62A of the holding member 62 and protruding, as shown in FIGS. When measuring electromagnetic radiation by attaching a light and narrow wireless terminal 70 and performing electromagnetic radiation measurement on a heavy and wide wireless terminal 70, as shown in FIGS. 6 and 7, the plurality of A more stable attachment can be achieved by attaching the heavy weight and wide wireless terminal 70 in a protruding state by inserting a plurality of terminal detachable members 63 into the grooves 62A of the dog, so that the weight or width of the object to be measured Accordingly, the measurer can easily perform the installation work of the detachable member 63 of the terminal.

The adhesive 64 is preferably provided in the form of a double-sided tape, the use environment temperature is 20 to 23 degrees, the humidity is 75% or less, and the adhesive strength of the adhesive 64 ranges between 15N and 40N. However, preferably, the average size of adhesive force is about 25N.

The adhesive 64 having an adhesive strength between 15N and 40N increases the adhesive strength increase rate, so that the wireless terminal 70 can be used without deformation or damage to related devices including the wireless terminal 70 during repeated mounting and detachment. do.

Therefore, by attaching the wireless terminal 70 by the adhesive 64 applied to the front surface of the terminal detachable member 63 to measure electromagnetic waves, the wireless terminal 70 mounting method is adopted as a method in which an adhesive form is applied. It is possible to minimize the interference of radio waves radiated from the 70, thereby improving the accuracy and reliability of the measurement of electromagnetic radiation, and at the same time, the measurement can be performed while maintaining the stable adhesive strength of the wireless terminal 70, and at the same time, the adhesive 64 Even if the wireless terminal 70 is detached and then re-attached, the adhesive force is maintained and the efficiency of the measurement test can be increased.

In the present invention, the wireless terminal 70 is rotated 360 degrees in a horizontal direction by the first motor 51 in a state in which the wireless terminal 70 is firmly attached to the adhesive 64 or the double-sided tape applied to the front surface of the terminal detachable member 63. The turntable 52 rotates 360 degrees in the vertical direction by the second motor 54 installed on the upper side of the pillar 53 on one side of the turntable 52 and the wireless terminal mounting jig means 60 It is possible to prevent the wireless terminal 70 from leaving even if it rotates together with the vertical and horizontal rotations of the 62 and the detachable member 63, and the wireless terminal 70 is moved to the terminal to measure another wireless terminal 70. Since it can be easily detached from the detachable member 63, it is possible to shorten the preparation work time for the measurement work and provide convenience in the replacement work of the measurement object.

On the other hand, as shown in a) of FIG. 8, a concave-convex fitting piece 61A' is protrudingly formed on the circumferential surface of a plurality of fitting protrusions 61A protruding to one side of the rotating member 61 for connecting the holding member, and the concave-convex fitting The fitting concave portion 62B' corresponding to the piece 61A' is formed in each of the fitting holes 62B formed on the other side of the holding member 62 to form the concave-convex fitting piece 61A' and the fitting concave portion 62B. ') is mutually fitted, so that even if the rotating member 61 for connecting the mounting member rotates 360 degrees in the vertical direction, the rotating member 61 for connecting the mounting member rotates stably without fear of being separated from the mounting member 62. As shown in FIG. The mounting member ( 62) can be prevented from being separated from the terminal detachable member 63 from the holding member 62 even if it is rotated in the vertical direction by 360 degrees, and this aspect can make a solid assembly in various male and female forms.

Although the above has been described with reference to the embodiments, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will not be exemplified in the above to the extent that they do not deviate from the essential characteristics of the present embodiment. It will be appreciated that various variations and applications are possible.

And, differences related to these variations and applications should be construed as being included in the scope of the present invention defined in the appended claims.

10: chamber 11: absorber
20: radio wave transmitter 21: feeding antenna
30: radio wave reflector 40: positioner controller
50: positioner 52: turntable
54: second motor 54A: rotary plate
60: jig means for mounting a wireless terminal 61: rotating member for connecting a mounting member
61A: fitting protrusion 62: mounting member
63: wireless terminal detachable member 64: adhesive
70: wireless terminal

Claims (5)

a chamber 10 forming a predetermined space in which an absorber 11, a radio wave absorber formed by adsorbing carbon or the like to a resin such as polyurethane, is installed on an inner wall surface; On one side inside the chamber 10, a power supply antenna 21 connected to a radio wave transmitter 20 that transmits radio waves for testing and a radio wave reflecting device 30 are installed, and the positioner controller 40 is installed inside the chamber 10. Install a positioner 50 driven by a turntable 52 that rotates 360 degrees by a first motor 51 in a horizontal direction; A jig means 60 for holding a wireless terminal rotated 360 degrees by a second motor 54 in a vertical direction installed on one side of the upper side of the pillar 53 on one side of the turntable 52; 70) to have three-dimensional coordinates while measuring antenna radiation characteristics and electromagnetic wave absorption, the jig means 60 for holding the wireless terminal is a rotating plate installed on the shaft S of the second motor 54. (54A) and a rotating member 61 for connecting the mounting member coupled to the fixing bolt (54B); A mounting member 62 coupled to a plurality of fitting protrusions 61A on one side of the rotating member 61 for connecting the mounting member; a plurality of wireless terminal detachable members 63 inserted into a plurality of grooves 62A formed on one side of the mounting member 62; and an adhesive 64 applied to the entire surface of the detachable member 63 of the wireless terminal, the circumferential surface of a plurality of fitting protrusions 61A protruding to one side of the rotating member 61 for connecting the holding member has a concavo-convex shape. A fitting piece 61A' of the protrusion is formed, and a fitting concave portion 62B' corresponding to the concave-convex fitting piece 61A' is formed in each of the fitting holes 62B formed on the other side of the holding member 62 to form the concave-convex portion. The fitting piece (61A') and the fitting concave portion (62B') of the shape are coupled in a mutually fitting manner, and the fitting concave portion 62A around each of the plurality of concave grooves 62A formed on one side of the mounting member 62 ') is formed, and the concave-convex fitting piece 63A formed on the circumferential surface of the terminal detachable member 63 is fitted into the fitting concave portion 62A' and the concave-convex fitting piece 62A' and the concave-convex fitting piece (63A) is configured to be assembled and separated without assembling bolts, so that the rotating member 61 for connecting the mounting member, the mounting member 62, and the wireless terminal detachable member 63 are coupled in a mutually fitting manner, but the mounting member (62) is provided to have a thickness of about 30 mm or more in the 30 GHz band by molding with a low dielectric constant loss foam having a low permittivity (dielectric constant of 1.5 or less) and electrical conductivity (0.30 S / m or more), and the terminal detachable member 63 is It is molded and provided with high-strength low-loss foam having low permittivity (dielectric constant 1.04 or less) and electrical conductivity (electric conductivity 0.01S/m or less), and the adhesive strength of the adhesive 64 applied to the entire surface of the terminal detachable member 63 is 15N to 40N. Electromagnetic radiation measuring device of a wireless terminal, characterized in that provided to have a range between. delete delete The method of claim 1, wherein the wireless terminal (70) is attached using an adhesive (64) applied to the front surface of the detachable member (63) to mount the wireless terminal (70) in an adhesive manner, but the mounting member In the case of attaching the back side of the light weight and narrow wireless terminal 70 to the adhesive 64 applied to the front surface of the terminal detachable member 63 fitted and fixed into the groove 62A of (62), the mounting member ( 62) by attaching a light weight and narrow wireless terminal 70 by means of one or two terminal detachable members 63 fitted into one or two of the plurality of grooves 62A and protruding to emit electromagnetic waves When the measurement is performed, and when the electromagnetic radiation measurement is performed for the wireless terminal 70 that is heavy and has a wide width, a plurality of terminal detachable members 63 are inserted into the plurality of grooves 62A, and the weight is protruded. Electromagnetic radiation measurement device of a wireless terminal, characterized in that the measurement is performed by attaching the heavy and wide wireless terminal (70).



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