Alternative efficiency measuring method and system for dual-load waveguide calorimeter
A technology of efficiency measurement and calorimeter, which is applied in the field of measurement of double-load waveguide calorimeter, can solve problems such as inability to learn from, different structures, working processes, and use of calorimeters, so as to achieve accurate and reliable measurement results and improve complex Accuracy, the effect of improving accuracy
Active Publication Date: 2017-05-31
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology
International research on alternative efficiency measurement methods is mainly concentrated in the field of microcalorimeters, whose structure, working process, and use are different from those of calorimeters, and cannot be used for reference.
Especially with the continuous advancement of millimeter-wave technology, measurement equipment above 110 GHz is emerging, which puts forward a clear demand for traceability of power parameters, and only calorimeter methods can be used to reproduce power values in this frequency range
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[0025] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0026] Due to the influence of the structure and temperature difference measurement position, there are differences in the thermopile response caused by the microwave power and DC power absorbed by the working heat-insulated waveguide load. The invention proposes to use substitution efficiency to represent the microwave power absorption efficiency of ...
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The invention discloses an alternative efficiency measuring method and system for a dual-load waveguide calorimeter. The method comprises the following steps: inputting a microwave signal into a working heat-insulation waveguide transmission line, and measuring a first voltage value output by a thermopile; short-circuiting the tail end of the transmission line with a short-circuit plate, inputting a microwave signal with the same power to the transmission line, and measuring a second voltage value output by the thermopile; measuring a scattering parameter of the transmission line and a reflection coefficient of a load, and calculating the transmission efficiency of the calorimeter; measuring the reflection coefficient of the short-circuit plate; calculating an alternative efficiency. The measuring system comprises a dual-load waveguide calorimeter, a signal source, a power divider, an isolator, a short-circuit plate, a nanovoltmeter and a power monitoring module. The method is simple in steps, the measuring system is simple in design and low in cost, dual-load waveguide calorimeter direct-current / microwave power reproduction accuracy can be increased, and measurement errors caused by a thermopile pile difference due to working heat-insulation waveguide load absorption microwaves and direct-current power are corrected.
Description
technical field [0001] The present application relates to the field of radio measurement, in particular to the measurement of a double-load waveguide calorimeter. Background technique [0002] The double-load waveguide calorimeter, as the key instrument for reproducing the power value, can trace the microwave power to the DC power through the temperature change, so as to realize the accurate measurement of the microwave power. International research on alternative efficiency measurement methods is mainly concentrated in the field of microcalorimeters, whose structure, working process, and use are different from those of calorimeters, so they cannot be used for reference. Especially with the continuous advancement of millimeter wave technology, measurement equipment above 110 GHz is emerging, which puts forward a clear demand for traceability of power parameters, and the only way to reproduce the power value in this frequency range is the calorimeter method. Therefore, in or...
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IPC IPC(8): G01R35/00G01K19/00
CPCG01K19/00G01R35/00
Inventor 何巍张伟伟程春悦
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT