System and method of millimeter wave attenuation measurement

An attenuation measurement, millimeter wave technology, applied in the transmission system, transmission monitoring, electrical components, etc., can solve the problem of out-of-synchronization between the external reference frequency of the lock-in amplifier and the frequency of the audio signal, the frequency jitter of the audio signal, and the detection noise of the lock-in amplifier at the receiving end Mutual crosstalk and other issues can be solved to solve the problem of out-of-synchronization between the external reference frequency and the audio signal frequency, stabilize the measurement circuit, and reduce the frequency jitter of the audio signal
CN109617633AActive Publication Date: 2019-04-12BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
Publication Date
2019-04-12

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Abstract

The application discloses a method of millimeter wave attenuation measurement and a system thereof. The method comprises: dividing a millimeter wave signal into a radio frequency test signal and a radio frequency reference signal; carrying out frequency conversion on the two radio frequency signals to form audio signals; and respectively carrying out voltage dividing on an audio test signal beforeand after insertion of the measured attenuator, using an audio reference signal for coherent receiving on the audio test signal to obtain two signal intensity values, enabling second signal intensityto be equal to first signal intensity, recording a first voltage dividing ratio and a second voltage dividing ratio, and calculating an attenuation value of the measured attenuator. The system of theinvention includes a radio frequency signal generator, a first directional coupler, an inductive voltage divider, a test unit, a reference unit, a lock-in amplifier and the measured attenuator. According to the method and the system, a two-channel signal measurement manner is employed, a measurement circuit is enabled to be stabler, the problem that external reference frequency and audio signal frequency of lock-in amplifiers of single-channel systems are not synchronized is solved, and the reference signal provided to the lock-in amplifier is very accurate.
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Description

technical field

[0001] The invention relates to the technical field of radio measurement, in particular to a millimeter wave attenuation measurement system and method. Background technique

[0002] Electromagnetic waves in the frequency domain of 30-300 GHz (wavelength 1-10 mm) are usually called millimeter waves, which are located in the wavelength range where microwaves and far-infrared waves overlap, so they have the characteristics of both spectrums. Millimeter waves have numerous applications in areas such as communications, radar, remote sensing, and radio astronomy. Millimeter wave technology has made major breakthroughs in the development of transmitters, receivers, antennas, and millimeter wave devices, and millimeter wave radar has entered a new stage of various applications.

[0003] The attenuation parameter is one of the basic parameters of radio metering, which characterizes the transmission characteristics of various transmission lines, electronic components,...

Claims

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