High-power microwave power detector

Abstract

The invention discloses a high-power microwave power detector, which comprises a waveguide, an input matching circuit, a detection diode, an output filtering circuit, and a direct current power supply, wherein the input matching circuit is a three-screw rod assembly, the output filtering circuit is a coaxial low-pass filter, the detection diode is a vacuum diode, the three-screw rod assembly and the coaxial low-pass filter are fixedly arranged on a cavity of the waveguide, one end of the coaxial low-pass filter is connected with the cavity of the waveguide through the vacuum diode, the other end of the coaxial low-pass filter is connected with a standard N-shaped joint, and the direct current power supply is connected with a lamp filament of the vacuum diode. After the lamp filament of the vacuum diode is preheated, a microwave signal is sent to the vacuum diode through the three-screw rod assembly, an alternating current electric field is generated between a cathode and an anode of the vacuum diode, and then the current is formed; after the current is filtered by the coaxial low-pass filter, a current path is formed by an oscilloscope detector sampling resistor, and then the size of the power of the detected microwave signal is obtained.

Description

technical field [0001] The invention relates to the technical field of high-power microwaves, in particular to a high-power microwave power detector, which is suitable for high-power microwave peak power measurement under strong electromagnetic environment conditions. Background technique [0002] With the application of high-power microwave technology in high-energy particle accelerators, plasma heating, high-power radar and other fields, people have put forward higher and higher requirements for high-power microwave measurement technology. However, high-power microwaves usually have the characteristics of high peak power, short pulse width, single pulse or pulse train, and strong electromagnetic interference or even ray interference in the measurement environment, which makes it difficult to accurately measure power. [0003] A widely used high-power microwave measurement method is to attenuate the high power to medium or low power for direct measurement. This high-power ...

AI Technical Summary

Problems solved by technology

However, the traditional microwave power detector is limited by the power capacity of its core component, the crystal diode. The input power is generally required to be less than 1W, and a large amount of attenuation needs to be connected to make the measurement system complex, and the measurement error will also increase.

The traditional microwave power detector is also limited by the sensitivity of the crystal diode, the detection output signal is weak, and it is susceptible to interference in strong electromagnetic radiation and ray environments, making measurement difficult

Images