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Electric field measuring device

A measuring device and measurement technology, applied in the direction of measuring device, electromagnetic field characteristics, measuring electrical variables, etc., to achieve the effect of simple output saturation or distortion

Inactive Publication Date: 2012-11-07
SUMITOMO OSAKA CEMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The problem to be solved by the present invention is to solve the above-mentioned problems, and provide an electric field measurement device that can easily confirm the output saturation or distortion state of the transmission device caused by the level of the input signal from the antenna, and does not cause any damage caused by the signal from the measurement device itself. When the noise of the noise interferes with the measurement of the electric field in the equipment such as an anechoic chamber

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Embodiment Construction

[0031] Hereinafter, the present invention will be described in detail using preferred examples.

[0032] figure 1 It is a figure which shows the outline|summary of the electric field measuring apparatus of this invention. The electric field intensity of electromagnetic waves (wave line arrows) generated from the device under test (EUT) 8 set in the area for detecting electromagnetic waves such as the anechoic chamber 10 is measured. Reference numeral 9 denotes a mounting table on which a device to be measured is mounted, such as a rotary table.

[0033] The "area for detecting electromagnetic waves" in the present invention is not limited to an anechoic chamber, but means a space such as an open site where a device to be measured is installed for detecting electromagnetic waves generated by the device to be measured.

[0034] In addition, the area outside the "area for detecting electromagnetic waves" refers to an area that does not interfere with the measurement of electrom...

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Abstract

Disclosed is an electric field measuring device such that output saturation or a distortion state in a transmission device due to the input signal level from an antenna can be easily confirmed and electric field measurement in facilities such as an anechoic chamber is not impeded by noise from the measuring device itself. A head part (2) arranged in the anechoic chamber is provided with a signal intensity detector (RF detector, level detection circuit) which detects whether or not the intensity of an output signal from an antenna exceeds a given level, a signal generator which generates a detection result signal based on the detection result of the signal intensity detector, and an MZ-type modulator. The detection result signal is added to the output signal from the antenna to drive the MZ-type modulator, the detection result signal is detected by a monitor PD and monitor detection circuit provided in a controller part (6) outside the anechoic chamber, and the detection result is displayed on the display.

Description

technical field [0001] The present invention relates to an electric field measurement device, and in particular to an electric field measurement used in the field of electromagnetic field measurement such as measurement of radiated electromagnetic wave noise from electronic equipment, evaluation of electromagnetic wave measurement equipment such as an anechoic chamber, and evaluation of antennas, etc. device. Background technique [0002] The measurement of radiated electromagnetic wave noise and the like is performed in a measurement environment in which electromagnetic waves outside the measurement target are suppressed by equipment such as an anechoic chamber. Therefore, the signal received by the receiving antenna in the dark room is transmitted to the adjacent measurement room, and the measurement is performed by the measuring device installed there. [0003] In recent years, electromagnetic wave noise has increased in frequency with the increase in speed of electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
CPCG01R29/0885G01R29/0871
Inventor 宫崎德一坂井猛牟礼胜仁
Owner SUMITOMO OSAKA CEMENT CO LTD