JP2013104714A - Communication interference electromagnetic wave measurement device, communication interference electromagnetic wave measurement element, and communication interference electromagnetic wave measurement device for display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately measure an influence of electromagnetic waves transmitted by an electronic apparatus on wireless communication quality.SOLUTION: A communication interference electromagnetic wave measurement device comprises: a first antenna line (102) to which communication signals by a wireless communication protocol are applied; a second antenna line (103) which performs transmission and reception with the first antenna line by the wireless communication protocol; a measurement element (200) to which the respective first antenna line and second antenna line are connected; and a communication quality measurement device (101) which is connected to the second antenna line and performs measurement of communication quality. The measurement element comprises: a substrate; first wiring on the substrate which is electrically connected to the first antenna line; and second wiring on the substrate which is electrically connected to the second antenna line.

Description

  The present invention relates to a communication interference electromagnetic wave measuring device, a communication interference electromagnetic wave measuring element, and a display device communication interference electromagnetic wave measuring device.

  Liquid crystal display devices are widely used as display devices for information communication terminals such as computers and television receivers. An organic EL display device (OLED), a field emission display device (FED), and the like are also known as thin display devices. Such a display device is incorporated in a mobile terminal such as a mobile phone and is widely used as an output device to users, but many mobile terminals have a wireless communication function, and electromagnetic waves emitted from the display device are It is known that the communication quality of wireless communication of these portable terminals is affected.

  In Patent Document 1, a measurement side plate that charges electric charges and a ground side plate that charges electric charges are connected to a resistance for measurement, and the sensor rotation axis is a structure of an axis object. An electric field data calculation means for calculating an EMI electric field from EMI vicinity measurement data at 180 degrees, a measurement calculation control unit for calculating a wave source charge at a three-dimensional position in the object to be measured using the EMI vicinity electric field calculation result; An EMI measuring apparatus having the above is disclosed.

  Patent Document 2 discloses a modulation signal generation unit that generates a modulation signal under the control of a control unit, a modulation signal transmission unit that transmits the modulation signal with a predetermined output, and a power line communication signal and combination unit from the modulation signal transmission unit A modulation signal receiving unit that receives a power line communication signal on which a signal that has passed through is superimposed, and a measurement signal having a predetermined output based on an instruction from a personal computer, and the state of the received signal at that time is a modulation signal demodulating unit And a control unit that detects the state of the noise that has passed through the coupling unit.

JP 2003-227856 A JP 2008-236700 A

  FIG. 8 shows an example of an electromagnetic wave measurement device 600 for measuring an electromagnetic wave output from the display surface of the display device. As shown in this figure, an electromagnetic wave measuring device 600 of a display device moves in three directions in the XYZ directions and is rotatable to the θ direction, and is attached to the stage 603 and is a measurement target display device. A measuring element 604 that moves along the display surface 605, a coaxial cable 602 that transmits current generated when the measuring element 604 receives electromagnetic waves, and a frequency of the current that flows through the coaxial cable 602 are connected to the coaxial cable 602. And a spectrum analyzer 601 for detecting power (amplitude). Thereby, the measured result can display the measured position (X, Y, Z, θ) and the magnitude of power on a colored map or the like.

  However, for example, when developing or testing a mobile communication terminal and using such an electromagnetic wave measurement device to investigate the cause of electromagnetic waves that interfere with communication, the location where the highest power is measured is the communication quality. Is not always the most influential part. If the communication method is conventional analog communication, the magnitude of the radiated electromagnetic wave is considered to correlate with the deterioration of the call sensitivity. It is considered that the magnitude of electromagnetic waves and the deterioration of communication quality do not always have a correlation because of the processing. That is, not only the magnitude of the electromagnetic wave but also complex factors such as the frequency of occurrence affect the deterioration of the communication quality, so that it is difficult to find the problem location only by measuring the magnitude of the electromagnetic wave.

  The present invention has been made in view of the above-described circumstances, and provides a communication interference electromagnetic wave measuring device, a communication interference electromagnetic wave measuring element, and a display device communication interference electromagnetic wave measuring device that measure electromagnetic waves that affect wireless communication. For the purpose.

  A communication interference electromagnetic wave measuring apparatus according to the present invention includes a first antenna line to which a communication signal according to a wireless communication protocol is applied, a second antenna line that transmits and receives with the first antenna line according to the wireless communication protocol, and a first antenna line. A measuring element connected to the second antenna line; and a communication quality measuring device connected to the second antenna line for measuring communication quality. The measuring element includes a substrate and the first antenna. A first wiring that is a wiring on the substrate to which a line is electrically connected; and a second wiring that is a wiring on the substrate to which the second antenna line is electrically connected. It is a characteristic communication interference electromagnetic wave measuring device.

  In addition, the communication interference electromagnetic wave measuring apparatus of the present invention includes a conductive first shield portion disposed around the first antenna line via an insulator, and an insulator around the second antenna line. A conductive second shield part disposed in a line, and the substrate further includes a conductive part having a larger area than the first wiring and the second wiring, and the first shield part. The second shield part may be electrically connected to the conductive part.

  In addition, the substrate of the communication interference electromagnetic wave measuring apparatus of the present invention is a flat plate-shaped first substrate portion, a flat plate-shaped second substrate portion that is disposed to face and separate from the first substrate portion, and The end of the first substrate unit and the end of the second substrate unit are connected, and the opposing surfaces of the first substrate unit and the second substrate unit form one inner surface, and the first substrate unit and the second substrate unit A connecting substrate portion connecting the end of the first substrate portion and the end of the second substrate portion so that the surfaces of the substrate portions that do not face each other become one outer surface; One antenna line is connected to an end of the first substrate portion opposite to the end to which the connection substrate portion is connected, and the second antenna line is an end to which the connection substrate portion of the second substrate portion is connected. The first wiring and the second wiring are connected to the outer surface, and the conductive portion is connected to the opposite end. Is disposed on the side surface, it is also possible.

  In the communication interference electromagnetic wave measuring apparatus of the present invention, the first wiring and the second wiring may be arranged in contact with each other on a substrate.

  In the communication interference electromagnetic wave measuring apparatus of the present invention, the first wiring and the second wiring may be separated from each other on the substrate.

  Moreover, the communication interference electromagnetic wave measuring apparatus of this invention can make communication quality measured by the said communication quality measuring apparatus into an error rate.

  A communication interference electromagnetic wave measuring element according to the present invention includes a flat plate-shaped first substrate portion, a flat plate-shaped second substrate portion disposed opposite to the first substrate portion, and the first substrate portion. An end side is connected to an end side of the second substrate unit, and opposing surfaces of the first substrate unit and the second substrate unit form one inner side surface, and the first substrate unit and the second substrate unit The connection substrate portion connecting the end of the first substrate portion and the end of the second substrate portion, and the wiring on the outer surface, so that the surfaces that do not face each other become one outer surface. A communication interference electromagnetic wave measuring element comprising: a wiring and a second wiring; and a conductive portion disposed on the inner surface and having a larger area than the first wiring and the second wiring.

  The display device communication interference electromagnetic wave measurement apparatus of the present invention is the communication interference electromagnetic wave measurement device according to any one of the above-mentioned claims, wherein the communication interference electromagnetic wave measurement device, the display device, and the measurement element of the communication interference electromagnetic wave measurement device are provided. And a stage for moving the display device at an arbitrary distance on an arbitrary coordinate on the display surface of the display device.

1 is a diagram schematically showing a communication interference electromagnetic wave measuring apparatus according to a first embodiment of the present invention. It is a figure shown in detail about the surface of the measuring element of FIG. It is a figure shown in detail about the back surface of the measuring element of FIG. It is a flowchart shown about the measuring method using the communication jamming electromagnetic wave measuring apparatus which concerns on 1st Embodiment of this invention. It is a figure shown about the measuring element in 2nd Embodiment of this invention. It is a figure shown about the measuring element in 3rd Embodiment of this invention. It is a figure shown about the measuring element in 4th Embodiment of this invention. It is a figure shown about an example of the electromagnetic wave measuring apparatus for measuring electromagnetic waves.

  Hereinafter, first to fourth embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[First Embodiment]
FIG. 1 schematically shows a communication interference electromagnetic wave measuring apparatus 100 according to a first embodiment of the present invention. As shown in this figure, a communication interference electromagnetic wave measuring apparatus 100 is attached with a measuring element 200 that detects an electromagnetic wave emitted from a display device 105 that is a measurement target, and the measuring element 200, and is moved in three directions in the XYZ directions. At the same time, the stage 107 that can be rotated in the θ direction, the portable terminal 106 that can communicate with the wireless communication protocol, the portable terminal 106 and the measuring element 200 are connected, and a communication signal based on the wireless communication protocol is applied. A first coaxial cable (first antenna line) 102 covered with a shield that prevents electromagnetic waves from entering, a communication quality measuring device 101 that measures a communication error rate, etc., and communication quality The measurement apparatus 101 and the measurement element 200 are connected to each other, the communication signal applied to the first coaxial cable 102 is applied, and the measurement is performed. A signal line to which electromagnetic wave noise detected in the child 200 is further applied, and a second coaxial cable (second antenna line) 103 covered with a shield that prevents the penetration of electromagnetic waves around the signal line. .

  FIG. 2 shows the surface of the measuring element 200 of FIG. 1 in detail. As shown in this figure, the measurement element 200 is a first micro strip line formed by being connected to a substrate 205 and a first coaxial cable 102 via a terminal and printed on the substrate 205. A wiring 201 and a second wiring 202 which is connected to the second coaxial cable 103 via a terminal and is formed by printing on the substrate 205, and is a microstrip line. The second wiring 202 is connected and integrally formed to form one wiring.

  FIG. 3 shows the back surface of the measuring element 200 of FIG. 1 in detail. As shown in this figure, a thin film 204 of a conductor is formed on one surface on the back surface, so that electromagnetic waves are not applied to the first wiring 201 and the second wiring 202 on the front surface side from the back surface side. Although not shown, the thin film of the conductor is connected to a shield covering the periphery of the signal line in the first coaxial cable 102 and the second coaxial cable 103.

  Next, a measurement method using the communication interference electromagnetic wave measuring apparatus 100 will be described with reference to FIG. First, in step S <b> 11, the mobile terminal 106 and the communication quality measuring apparatus 101 use a wired wireless communication protocol via the first coaxial cable 102, the first wiring 201, the second wiring 202, and the second coaxial cable 103. Communicate. The wireless communication protocol used here may be any wireless communication protocol or any wireless communication system. For example, any analog modulation method such as AM (Amplitude Modulation), FM (Frequency Modulation), and PM (Phase Modulation) may be used, CDMA (Code Division Multiple Access), FDMA (Frequency Division Multiple Access), and TDMA. Any multiplexing method such as (Time Division Multiple Access), TDD (Time Division Duplex), FDD (Frequency Division Duplex), or the like may be used.

  Next, in step S12, the display device 105 is turned on and a predetermined image is displayed on the screen, and the stage 107 is used to place the measuring element 200 in one or more predetermined predetermined positions. Move to one position (X, Y, Z, θ). Subsequently, in step S13, the communication quality measuring apparatus 101 acquires and records the error rate of communication with the portable terminal 106. Here, the error rate is used, but it may be an indicator such as a delay time or a voice quality indicating the communication quality.

  Next, in step S14, it is determined whether or not measurement for all measurement positions has been completed. If the determination is negative, the process returns to step S12, moves to the next measurement position, and repeats acquisition of the error rate in steps S12 and S13. On the other hand, in the case of a positive determination, the measurement is terminated.

  In the present embodiment, it is assumed that measurement is performed at a plurality of positions at a predetermined height on the screen of the display device 105. However, the measurement may be performed on the back side of the display device 105, and is not limited to the display device. First, the influence on the communication rate by electromagnetic waves around other electronic devices may be measured.

  As described above, in the present embodiment, the influence of electromagnetic waves on wireless communication is evaluated based on the communication quality. Therefore, the influence of electromagnetic waves that cannot be evaluated by measuring the electromagnetic wave level can be evaluated. In addition, since it is possible to more accurately measure the effect of electromagnetic waves emitted by electronic devices, particularly display devices, on wireless communication quality, the wireless communication function incorporated with the electronic device by eliminating the cause of the effects on wireless communication Can improve the quality.

[Second Embodiment]
A second embodiment of the present invention will be described. The communication interference electromagnetic wave measurement apparatus according to the second embodiment is different from the communication interference electromagnetic wave measurement apparatus according to the first embodiment in that it includes a measurement element 210, and is the same in other points, and thus redundant description is omitted. . FIG. 5 is a diagram illustrating the measuring element 210 in the second embodiment.

  As shown in this figure, the measuring element 210 is a first microstrip line formed by being connected to the substrate 215 and the first coaxial cable 102 via a terminal and printed on the substrate 215. The wiring 211 has a second wiring 212 that is a microstrip line that is connected to the second coaxial cable 103 via a terminal and printed on the substrate 215. Here, unlike the first embodiment, the first wiring 211 and the second wiring 212 are not connected. These wirings are parallel to each other without being in contact with each other, and transmit and receive communication signals by mutual electromagnetic waves. Therefore, by adopting such a wiring shape, the electromagnetic wave of the communication signal is synthesized with the electromagnetic wave emitted from the measurement object, so that the influence on the wireless communication can be detected with higher sensitivity.

  In the present embodiment, the first wiring 211 and the second wiring 212 are parallel to each other. However, the first wiring 211 and the second wiring 212 may not be parallel to each other, and may be any shape. Good.

  As described above, also in this embodiment, since the influence of electromagnetic waves on wireless communication is evaluated based on communication quality, the influence of electromagnetic waves that cannot be evaluated by measuring the electromagnetic wave level can be evaluated. In addition, since it is possible to more accurately measure the effect of electromagnetic waves emitted by electronic devices, particularly display devices, on wireless communication quality, the wireless communication function incorporated with the electronic device by eliminating the cause of the effects on wireless communication Can improve the quality.

[Third Embodiment]
A third embodiment of the present invention will be described. The communication interference electromagnetic wave measurement apparatus according to the third embodiment is different from the communication interference electromagnetic wave measurement apparatus according to the first embodiment in that it includes a measurement element 220, and is the same in other points, and thus redundant description is omitted. . FIG. 6 is a diagram illustrating the measurement element 220 according to the third embodiment.

  As shown in this figure, the measuring element 220 is connected to the first coaxial cable 102 via a terminal on the outer surface of the U-shaped substrate and the U-shaped substrate, and printed on the substrate. A microstrip line formed by connecting the first wiring 221 that is a formed microstrip line to the second coaxial cable 103 via a terminal outside the substrate and printing on the substrate. It has a certain second wiring 222 and a conductive thin film 224 formed on the surface opposite to the surface where the first wiring 221 and the second wiring 222 are wired. Here, the first wiring 221 and the second wiring 222 are connected and integrally formed so as to form one wiring.

  The U-shaped substrate of the measuring element 220 includes a flat plate-shaped first substrate portion 225, a flat plate-shaped second substrate portion 226 that is disposed opposite to the first substrate portion 225, and a first substrate portion 225. The opposing surfaces of the substrate unit 225 and the second substrate unit 226 are one inner surface, and the surfaces of the first substrate unit 225 and the second substrate unit 226 that are not opposed to each other are one outer surface. A connection substrate portion 227 that connects an end of the first substrate portion 225 and an end of the second substrate portion 226, and the first substrate portion 225, the second substrate portion 226, and the connection substrate portion 227 are integrally formed. Thus, a U-shaped shape is formed.

  As described above, also in this embodiment, since the influence of electromagnetic waves on wireless communication is evaluated based on communication quality, the influence of electromagnetic waves that cannot be evaluated by measuring the electromagnetic wave level can be evaluated. In addition, since it is possible to more accurately measure the effect of electromagnetic waves emitted by electronic devices, particularly display devices, on wireless communication quality, the wireless communication function incorporated with the electronic device by eliminating the cause of the effects on wireless communication Can improve the quality.

[Fourth Embodiment]
A fourth embodiment of the present invention will be described. The communication interference electromagnetic wave measurement apparatus according to the fourth embodiment is different from the communication interference electromagnetic wave measurement apparatus according to the first embodiment in that it includes a measurement element 230, and is the same in other points, and thus redundant description is omitted. . FIG. 7 is a diagram illustrating the measurement element 230 according to the fourth embodiment.

  As shown in this figure, a measuring element 230 is formed by connecting a U-shaped substrate to the first coaxial cable 102 via a terminal on the outside of the substrate and printing on the substrate. The first wiring 231 that is a strip line and the second wiring 232 that is a micro strip line formed by being connected to the second coaxial cable 103 via a terminal outside the substrate and printed on the substrate. And a conductive thin film 234 formed on the surface opposite to the surface on which the first wiring 231 and the second wiring 232 are wired. Here, unlike the third embodiment, the first wiring 231 and the second wiring 232 are not connected. These wirings are parallel to each other without being in contact with each other, and transmit and receive communication signals by mutual electromagnetic waves. Therefore, by adopting such a wiring shape, the electromagnetic wave of the communication signal is synthesized with the electromagnetic wave emitted from the measurement object, so that the influence on the wireless communication can be detected with higher sensitivity.

  As in the third embodiment, the U-shaped substrate of the measuring element 230 includes a flat plate-shaped first substrate portion 235 and a flat plate-shaped first substrate portion 235 that is disposed opposite to the first substrate portion 235. The two substrate portions 236 and the opposing surfaces of the first substrate portion 235 and the second substrate portion 236 form one inner surface, and the surfaces on the side where the first substrate portion 235 and the second substrate portion 236 do not face each other are one. A connection substrate portion 237 that connects the end of the first substrate portion 235 and the end of the second substrate portion 236 so as to be on the outer surface; the first substrate portion 235, the second substrate portion 236, and the connection substrate The portion 237 is integrally formed to form a U-shape.

  In the present embodiment, the first wiring 231 and the second wiring 232 are parallel to each other. However, the first wiring 231 and the second wiring 232 may not be parallel to each other, and may be any shape. Good.

  As described above, also in this embodiment, since the influence of electromagnetic waves on wireless communication is evaluated based on communication quality, the influence of electromagnetic waves that cannot be evaluated by measuring the electromagnetic wave level can be evaluated. In addition, since it is possible to more accurately measure the effect of electromagnetic waves emitted by electronic devices, particularly display devices, on wireless communication quality, the wireless communication function incorporated with the electronic device by eliminating the cause of the effects on wireless communication Can improve the quality.

  100 communication interference electromagnetic wave measuring device, 101 communication quality measuring device, 102 first coaxial cable, 103 second coaxial cable, 105 display device, 106 portable terminal, 107 stage, 200 measuring element, 201 first wiring, 202 second wiring, 204 thin film, 205 substrate, 210 measuring element, 211 first wiring, 212 second wiring, 215 substrate, 220 measuring element, 221 first wiring, 222 second wiring, 224 thin film, 225 first substrate part, 226 second substrate Part, 227 connection substrate part, 230 measuring element, 231 first wiring, 232 second wiring, 234 thin film, 235 first substrate part, 236 second substrate part, 237 connection substrate part, 600 electromagnetic wave measuring device, 601 spectrum analyzer, 602 Coaxial cable, 603 stage, 604 measuring element, 605 Display device.

Claims (8)

A first antenna line to which a communication signal according to a wireless communication protocol is applied;
A second antenna line for transmitting and receiving with the first antenna line by the wireless communication protocol;
Measuring elements to which the first antenna line and the second antenna line are respectively connected;
A communication quality measuring device connected to the second antenna line for measuring communication quality,
The measuring element is
A substrate,
A first wiring that is a wiring on the substrate to which the first antenna line is electrically connected;
A communication interference electromagnetic wave measuring apparatus comprising: a second wiring that is a wiring on the substrate to which the second antenna line is electrically connected. A conductive first shield portion disposed around the first antenna wire via an insulator;
A conductive second shield part disposed via an insulator around the second antenna line, and
The substrate further includes a conductive portion having a larger area than the first wiring and the second wiring,
The communication interference electromagnetic wave measuring apparatus according to claim 1, wherein both the first shield part and the second shield part are electrically connected to the conductive part. The substrate is
A plate-shaped first substrate portion;
A flat plate-shaped second substrate portion disposed opposite to the first substrate portion, and
The end of the first substrate unit and the end of the second substrate unit are connected, and the opposing surfaces of the first substrate unit and the second substrate unit form one inner surface, and the first substrate unit and the first substrate unit A connection substrate portion for connecting the end of the first substrate portion and the end of the second substrate portion so that the surfaces of the two substrate portions that do not face each other become one outer surface;
The first antenna line is connected to an end of the first substrate portion opposite to an end to which the connection substrate portion is connected,
The second antenna line is connected to an end of the second substrate portion opposite to the end to which the connection substrate portion is connected,
The first wiring and the second wiring are wired on the outer surface,
The communication interference electromagnetic wave measuring apparatus according to claim 2, wherein the conductive portion is disposed on the inner side surface.   4. The communication interference electromagnetic wave measuring apparatus according to claim 1, wherein the first wiring and the second wiring are arranged in contact with each other on a substrate. 5.   4. The communication interference electromagnetic wave measuring apparatus according to claim 1, wherein the first wiring and the second wiring are separated from each other on a substrate. 5.   The communication interference electromagnetic wave measuring apparatus according to claim 1, wherein the communication quality measured by the communication quality measuring apparatus is an error rate. A plate-shaped first substrate portion;
A flat plate-shaped second substrate portion disposed opposite to the first substrate portion, and
An end surface of the first substrate unit and an end side of the second substrate unit are connected, and opposing surfaces of the first substrate unit and the second substrate unit form one inner surface, and the first substrate unit and A connection substrate portion that connects the end of the first substrate portion and the end of the second substrate portion such that the surfaces of the second substrate portions that do not face each other become one outer surface;
A first wiring and a second wiring which are wiring on the outer surface;
An element for measuring communication interference electromagnetic waves, comprising: a conductive portion that is disposed on the inner surface and has a larger area than the first wiring and the second wiring. The communication interference electromagnetic wave measuring device according to any one of claims 1 to 6,
A display device;
A display device communication interference electromagnetic wave measurement device comprising: a stage for moving a measurement element of the communication interference electromagnetic wave measurement device on an arbitrary coordinate on the display surface of the display device to an arbitrary distance from the display surface.

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