Amplitude and phase calibration device and method for optical fiber type electromagnetic field probe

A technology for calibrating devices and electromagnetic fields, which is applied in measuring devices, measuring electrical variables, instruments, etc., can solve the problems of high test cost, limited electric field range of microwave anechoic chamber, and resource shortage, and achieve small size, easier construction and realization, and low transmission loss Effect

Inactive Publication Date: 2019-12-06
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing calibration technology generally uses the standard field generated by the microwave anechoic chamber to calibrate the optical probe. However, because the microwave anechoic chamber is indoors, and the resources are tight and the test cost is high, it is difficult to meet the requirements for the construction of the electromagnetic field probe work site, and the microwave anechoic chamber The range of available electric fields is limited

Method used

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  • Amplitude and phase calibration device and method for optical fiber type electromagnetic field probe
  • Amplitude and phase calibration device and method for optical fiber type electromagnetic field probe
  • Amplitude and phase calibration device and method for optical fiber type electromagnetic field probe

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Embodiment Construction

[0035] Such as figure 1 Shown, a kind of device of amplitude and phase calibration of fiber-optic electromagnetic field probe, this device comprises:

[0036] A vector network analyzer is used to provide a microwave excitation signal for the calibration device, and measure the amplitude and phase values ​​in the calibration device;

[0037] A power amplifier for amplifying microwave power;

[0038] Adjustable attenuation / phase shifter for varying amplitude and phase values ​​in the calibration setup;

[0039] Dual directional couplers are used to couple the input power of the GTEM cell and the reflected power of the GTEM cell, and monitor the accurate power in the GTEM cell in real time;

[0040] a first power meter for measuring the input power of the GTEM cell;

[0041] A second power meter for measuring the reflected power of the GTEM cell;

[0042] GTEM cell, used to form a stable and uniform electromagnetic field;

[0043] The probe is placed in the center of the tes...

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Abstract

The invention relates to an amplitude and phase calibration device for an optical fiber type electromagnetic field probe. The device comprises a vector network analyzer used for measuring amplitude and phase values in the calibration device, a power amplifier used for carrying out microwave power amplification, an adjustable attenuation / phase shifter used for changing the amplitude and phase values in the calibration device, a bi-directional coupler used for coupling the input power of a GTEM cell and the reflective power of the GTEM cell, a first power meter, a second power meter, the GTEM cell used for forming a stable and uniform electromagnetic field, a probe used for sensing amplitude and phase changes of the electromagnetic field of the position where the probe is, and a demodulatingdevice used for separating electromagnetic wave information carried in optical carrier waves to obtain amplitude and phase information of an electromagnetic wave signal. The invention further discloses an amplitude and phase calibration method for the optical fiber type electromagnetic field probe. The device is closed in structure, low in transmission loss, difficult to subject to external interference, large in amplitude calibration range, easier to construct and suitable for field rapid calibration of the optical fiber type electromagnetic field probe.

Description

technical field [0001] The invention relates to the technical field of radio magnetic field on-line measurement, in particular to a device and a method for calibrating the amplitude and phase of a fiber-optic electromagnetic field probe. Background technique [0002] Electromagnetic field measurement is an important key part in many scientific and technological fields. Process control, electric field monitoring of medical equipment, ballistic control, electromagnetic compatibility measurement, microwave integrated circuit test, strong electric field measurement, etc. are all application fields of electromagnetic field sensors. As an effective means to study the near-field distribution of the electromagnetic field, the fiber-optic electromagnetic field probe has significant advantages such as anti-electromagnetic field interference, large measurement bandwidth, small volume, and easy remote measurement. It is an indirect electric field amplitude test method to perform modulat...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 盛永鑫杨露朱艳萍张思敏张业斌陶成忠宋吟龄
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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