A calibration device for high-power microwave pulse signal

Abstract

The invention discloses a high-power microwave pulse signal calibration unit comprising a coupler (2), a load (3), an attenuator (4), a power divider (5), a detector (6), an oscilloscope (7), a pulse power meter (8), a computer (9), and a temperature meter (10). One end of the coupler (2) is electrically connected with a microwave pulse signal source (1). The other end of the coupler (2) is respectively and electrically connected with the load (3) and the attenuator (4). The attenuator (4) is electrically connected with the power divider (5). The power divider (5) is respectively and electrically connected with the detector (6) and the pulse power meter (8). The detector (6) is electrically connected with the oscilloscope (7). The oscilloscope (7), the pulse power meter (8) and the temperature meter (10) are all electrically connected with the computer (9). The high-power microwave pulse signal calibration unit has the advantages that the influence of thermal effect of high-power microwave pulse signals upon the coupler and the attenuator is considered and accordingly high-power microwave pulse signals can be calibrated more precisely.

Description

technical field [0001] The invention relates to the technical field of calibration of microwave pulse signals, in particular to a calibration device for high-power microwave pulse signals. Background technique [0002] With the rapid development of microwave pulse technology, the power of microwave pulse signals required for practical applications has been greatly increased. For example, the peak power of microwave pulse signals required for practical applications is as high as GW, and its average power is as high as kW. There is an urgent need for a calibration device and a calibration method specially used for high-power microwave pulse signals to calibrate the power and waveform of high-power microwave pulse signals. [0003] In the prior art, calibration methods for microwave pulse signals mainly include calibration methods using calorimetric power meters, calibration methods using power detectors, calibration methods using coupled probes, calibration methods using coupl...

AI Technical Summary

Problems solved by technology

The calibration method using the calorimetric power meter has the following defects: First, this calibration method is only suitable for the calibration of small and medium power microwave pulse signals, not for high-power microwave pulse signals; second, this calibration method cannot Real-time measurement; third, the measurement period of this calibration method is longer; fourth, this calibration method can only measure the average power of microwave pulse signals, and cannot measure the peak power and waveform of microwave pulse signals

[0004] The calibration method using a power detector is suitable for the calibration of high-power microwave pulse signals, and the waveform of the microwave pulse signal can be measured in real time, but this calibration method has the following disadvantages: First, before calibrating the power microwave pulse signal, The power detector itself needs to be calibrated; second, this calibration method is only suitable for the measurement of microwave pulse signals with a single mode, and the measurement accuracy is low for the measurement of the power and waveform of microwave pulse signals with complex modes

[0008] The common disadvantage of the calibration method using a coupler and the cascaded coupling calibration method is that when a microwave pulse signal of high power (that is, the average power is greater than 1kW) is transmitted in the coupler and attenuator, the thermal effect of the high-power microwave pulse signal will be Causes a significant increase in the temperature of the coupler and attenuator, which in turn affects the performance of the coupler and attenuator

In this case, the coupling measured with the coupler and the attenuation measured with the attenuator will not be accurate

Especially in the millimeter wave and above wave bands, the measurement uncertainty of the cascade coupling calibration method will not meet the requirements of practical applications

[0009] In the prior art, there is no calibration device that considers the influence of the thermal effect of the high-power microwave pulse signal on the performance of the coupler and attenuator

Images