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
CN110542875AInactive Publication Date: 2019-12-06CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Publication Date
2019-12-06
Estimated Expiration
Not applicable · inactive patent

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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.
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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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