JP3043490B2 - Electromagnetic radiation visualization device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic radiation visualization apparatus for measuring the intensity of an electric field radiated from an object to be measured and visualizing the appearance of the object from the magnitude and direction.

[0002]

2. Description of the Related Art In conventional electromagnetic radiation measurement, the magnitude and direction of radiation are obtained as numerical values. For example, in the direction, the object to be measured is rotated horizontally, the antenna of the measuring instrument is searched up and down, and the size is obtained by measuring the electric field strength at that position.

[0003]

In order to find the radiation intensity and direction by the conventional electromagnetic radiation measurement method, it was necessary to grasp an image from numerical values. For this reason, there is a problem that much experience is required to draw an image at the measurement point of each frequency and to understand how the state of radiation changes with the change in frequency.

[0004]

Electromagnetic radiation visualization device SUMMARY OF THE INVENTION The present invention, variable length of the dipole antenna, lamp capable of changing the luminance, wide-band or a plurality of amplifier frequency band, detector and wave absorption power Assembled into the processed housing as one
A measuring unit housed therein, a unit moving means for moving the measuring unit to each point of three-dimensional coordinates, and a control means for changing the brightness of the lamp in proportion to the electric field intensity at the position of the measuring unit. With 3D measurement
Scan the fixed object and change the brightness of the lamp in three dimensions
Record continuously with a device that can record the position, and
It is characterized in that the electromagnetic radiation level in all directions is stereoscopically viewed every time .

[0005]

Next, the present invention will be described with reference to the drawings. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view of the measuring unit in FIG. 1, FIG. 3 is a block diagram of the measuring unit in FIG. 2, and FIG. It is a see-through | perspective perspective view which shows an example of an electromagnetic radiation radiation pattern.

In this embodiment, as shown in FIG. 1, the length of the variable-length dipole antenna 3 of the measurement unit 1 is fixed to a length corresponding to the measurement frequency, and the three-dimensional moving mechanism 4 moves through the anechoic chamber 7. Scan. At this time, the inside of the radio wave anechoic chamber 7 is optically darkened, and the brightness of the lamp 2 proportional to the electric field intensity at each measurement point is recorded in the open-exposed stereo camera 5. Thereby, as illustrated in FIG. 4, the direction and magnitude of the electromagnetic radiation from the DUT 6 are obtained as an electromagnetic radiation radiation pattern 8 in a three-dimensional image.

The housing of the measuring unit 1 shown in FIG. 2 is subjected to a radio wave absorption process to reduce disturbance of radiated radio waves. The lamp 2 is a single-color or multi-color light which is proportional to the intensity change and has high reproducibility. The length of the variable-length dipole antenna 3 is set manually or automatically for each measurement frequency.

Then, as shown in FIG. 3, the high frequency received from the variable-length dipole antenna 3 is tuned by the synchronization circuit 9, and
After amplification by the amplifier 10, detection is performed by the detection circuit 11, and the voltage after passing through the low-pass filter 12 is power-amplified by the amplifier 13 so that the lamp 2 emits light. In addition, a power supply 14 is built in the unit to avoid disturbance of radio waves due to wiring to the measurement unit 1.

[0009]

As described above, the electromagnetic radiation visualization apparatus of the present invention allows the position, direction, and intensity of the electromagnetic wave from the object to be measured to be stereoscopically viewed as an image. In addition, there is an effect that a radio wave absorption interference (EMI) countermeasure can be appropriately and promptly taken.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view of a measurement unit in FIG.

FIG. 3 is a block diagram of a measurement unit in FIG. 2;

FIG. 4 is a perspective view showing an example of an electromagnetic radiation radiation pattern from an object to be measured in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measurement unit 2 Lamp 3 Variable-length dipole antenna 4 Three-dimensional moving mechanism 5 Stereo camera 6 DUT 7 Electromagnetic anechoic chamber 8 Electromagnetic radiation pattern 9 Tuning circuit 10 Amplifier 11 Detection circuit 12 Low-pass filter 13 Amplifier 14 Power supply

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01R 29/08

Claims (1)

(57) [Claims] 1. A variable length of the dipole antenna, lamp capable of changing the luminance, wide-band or a plurality of Ann frequency band
And the detector and power supply are integrated into a housing that has been subjected to radio wave absorption processing.
A measuring unit built and housed, a unit moving means for moving the measuring unit to each point of three-dimensional coordinates, and a control for changing the brightness of the lamp in proportion to the electric field intensity at the position of the measuring unit. With means, three-dimensional
Scans the object under test and changes the brightness of the lamp to the third order
Record continuously with a device that can record the original position,
An electromagnetic radiation visualization apparatus characterized in that the electromagnetic radiation level in all directions is stereoscopically viewed for each frequency .