Liquid-type high-power microwave rectangular waveguide attenuator

Abstract

The invention belongs to a liquid-type high-power microwave rectangular waveguide attenuator which is matched with a power microwave measuring system in a microwave device. The liquid-type high-power microwave rectangular waveguide attenuator comprises a wave conductor, a trapezoid body attenuation liquid container, attenuation liquid, a forced circulating cooling system, wherein the trapezoid body attenuation liquid container is arranged in the waveguide body and is provided with an attenuation liquid inlet and an attenuation liquid outlet, the cooling tank containing attenuation liquid is arranged outside the wave conductor and is communicated with, the forced circulating cooling system comprising the attenuation liquid container, a circulating pump and an attenuation liquid circulatingpipe. The invention adopts trapezoid body liquid crystal glass as the attenuation liquid container, takes saline solution as attenuation liquid and adds the forced circulating cooling system, and thus the liquid-type high-power microwave rectangular waveguide attenuator has wide working band, good stability, small standing-wave ratio, high power capacity, high cooling efficiency and high bearablemaximum average power. If being matched with matched with a power microwave measuring system,, the liquid-type high-power microwave rectangular waveguide attenuator can effectively attenuate large power signal to the range capable of being measured by the measuring system, which provides a favourable condition for accurately analyzing and measuring the signal, is favourable for expanding the application range thereof and the like.

Description

Technical field [0001] The invention belongs to a microwave device in the field of electronic technology, in particular to a liquid high-power microwave rectangular waveguide attenuator matched with a power microwave measurement system. The attenuator attenuates the high-power signal to the range that the measurement system can measure in use, so as to analyze and measure the signal and improve its test accuracy. Background technique [0002] Microwave attenuators are one of the most commonly used components in microwave systems. Especially in power microwave measurement systems, it is often necessary to use attenuators to attenuate the power signal to the range that the measurement system can measure, and then analyze and measure the signal. And improve its test accuracy. At present, common high-power microwave attenuators are divided into dry attenuators and liquid attenuators. Dry attenuators use solids as microwave absorbing materials, and their attenuation is unstable with...

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Problems solved by technology

[0004] The solution of the present invention is aimed at the drawbacks of the background technology attenuation medium (liquid) such as narrow working frequency band, poor stability, small power capacity, low heat dissipation efficiency, and small maximum average power that can be tolerated; use saline solution as the attenuating medium to overcome the working frequency band narrow and poor stability, and the trapezoidal container with sloped front and rear sides is used as the attenuating liquid container, and the trapezoidal container is placed in the inner cavity of the waveguide along the axial direction (along the direction of microwave transmission), and is arranged outside the waveguide The attenuation liquid is connected to the forced circulation cooling system. While increasing the attenuation liquid in a large amount, the high-temperature liquid medium is transported from the trapezoidal container to the heat dissipation system outside the waveguide for circulation and heat dissipation, so as to stabilize the temperature of the attenuation liquid and achieve stable attenuator attenuation. It can greatly improve its power capacity and overcome the disadvantages of high temperature caused by the continuous absorption of microwave power by the liquid attenuation medium

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