Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system

A lock-in amplifier and attenuation measurement technology, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as high measurement accuracy, crosstalk, and increased measurement uncertainty

Active Publication Date: 2012-10-24
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

However, due to the serious crosstalk between the two channels in the millimeter-wave frequency band with higher frequency, the measurement uncertainty will be greatly increased, and it is difficult to obtain high measurement accuracy.

Method used

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  • Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system
  • Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system
  • Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system

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Embodiment Construction

[0024] The invention uses the series low intermediate frequency substitution method as the basis of the lock-in amplifier reference signal generation method. The series low-IF substitution method is widely used in broadband microwave attenuation measurement because of its high measurement accuracy and large dynamic range. The method is based on the frequency conversion of the radio frequency signal and the low intermediate frequency signal, and linearly converts the amplitude of the radio frequency signal into the amplitude of the low intermediate frequency signal, and then determines the attenuation by comparing with an accurate low intermediate frequency standard attenuator.

[0025] The core of the serial low-IF substitution method is to linearly transform the amplitude of the radio frequency signal into the amplitude of the low-IF signal. To realize the frequency conversion, a frequency mixing device is needed. In the 140-220GHz frequency band, in order to reduce the requi...

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Abstract

The invention relates to a device and a method for generating a reference signal of a phase-locked amplifier of a millimeter wave attenuation measurement system. The device comprises a millimeter wave signal source, a first isolation attenuator, a second isolation attenuator, a millimeter wave and harmonic wave mixer, a first intermediate frequency amplifier, a belt-pass filter, an intermediate frequency fundamental wave mixer, a second intermediate frequency amplifier and an inductive voltage divider which are connected sequentially, wherein the inductive voltage divider is further connected with the phase-locked amplifier and a third intermediate frequency amplifier. An output end of the third intermediate frequency amplifier is connected to an input end of the phase-locked amplifier. The device and the method for generating the reference signal can ensure measurement accuracy of the phase-locked amplifier. In addition, in the device, the reference signal can be generated only by one millimeter wave mixer, so that cost of the millimeter wave attenuation measurement system is greatly reduced.

Description

technical field [0001] The invention relates to a lock-in amplifier reference signal generation device and method, in particular to a millimeter wave attenuation measurement system lock-in amplifier reference signal generation device and method, which are applied to the millimeter wave attenuation measurement system. Background technique [0002] Attenuation is a basic parameter in radio metering, which characterizes the degree to which the amplitude of radio signals is weakened during transmission. Attenuation measurement plays an important role in radio measurement, which can provide traceability for power, S parameters, etc. Therefore, measurement institutions at all levels in various countries need to establish corresponding attenuation calibration systems to ensure accurate and uniform attenuation values. [0003] With the development of radio technology, frequency resources have become increasingly tight, and millimeter wave, a comprehensive interdisciplinary subject ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/318
Inventor 刘杰陈婷张国华
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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