Millimeter wave waveguide power meter based on calorimetric technology

Abstract

The invention discloses a millimeter wave waveguide power meter based on a calorimetric technology. The millimeter wave waveguide power meter comprises a power sensor and a power indicator, wherein the power sensor receives an external millimeter wave signal and realizes the replacement of millimeter wave power and direct current power, the signal output end of the power sensor is connected with the signal input end of the power indicator, and the power indicator is used for measuring and displaying the power value of the millimeter wave signal; the power indicator is a bridge type negative feedback indicator and comprises a bridge module, a signal processing and feedback module and a display module; the bridge module is arranged in the power sensor and is used for sensing the temperature signal change to generate a differential signal; and the signal processing and feedback module receives the differential signal, performs amplification, synchronous detection and direct current amplification processing on the differential signal, generates a direct current feedback signal and feeds back the direct current feedback signal to the bridge module.

Description

technical field [0001] The invention relates to the technical field of calorimeters. Specifically, it relates to a millimeter-wave waveguide power meter based on calorimetry technology. Background technique [0002] Power is one of the most basic parameters in the field of microwave and millimeter waves, and it is also an important parameter to characterize signal characteristics. The measurement of microwave and millimeter wave power is based on converting microwave and millimeter wave energy into energy forms such as heat, force, direct current or low-frequency electrical signals and then measuring them. Therefore, structurally speaking, a power measuring instrument is always composed of induction, absorption And realize the conversion part of energy conversion and the corresponding indicator. Generally, the power measuring instrument is called a power meter, the energy conversion part is called a power sensor (also called a power sensor, a power probe, a power seat, etc...

AI Technical Summary

Problems solved by technology

[0006] The calorimetric power meter is mainly used as a power standard, and it is greatly affected by the ambient temperature, so the scope of use is relatively small. Currently, such products on the market only cover up to 50GHz, and there is no calorimetric power meter in the frequency band above 50GHz, resulting in Due to the lack of working standards, many metrology institutions in my country are unable to develop millimeter wave power standards

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