High-power microwave power detector

A technology of microwave power and detector, which is applied in the direction of electric power measurement by applying digital technology, can solve the problems of weak detection output signal, complex measurement system, and increased measurement error, and achieve large output signal amplitude, adjustable sensitivity, Withstand high power effect

Active Publication Date: 2014-04-02
中国人民解放军63660部队
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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

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Embodiment Construction

[0019] In order to improve the input power capacity and output voltage of the microwave power detector, the present invention provides a high-power microwave power detector based on vacuum diodes, including a waveguide 100 (BJ-100 waveguide is selected in the present invention), an input matching circuit 200, Detection diode 300, output filter circuit 400, DC power supply, etc., such as figure 1 As shown, the detection diode 300 adopts a vacuum diode and is placed in the center of the waveguide broadside; the input matching circuit 200 adopts a three-tuned screw assembly, which is placed in front of the detection diode 300, and the input impedance is realized by changing the depth of the screw inserted into the waveguide. match. The output filter circuit 400 adopts a coaxial low-pass filter, which is convenient to connect with a vacuum diode. The DC power supply is connected with the vacuum diode filament for heating the filament.

[0020] The working principle of the high-p...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/133
Inventor 曾红锦闫军凯吴晓龙刘小龙
Owner 中国人民解放军63660部队
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