Broadband liquid attenuator based on T-shaped resistance network

Abstract

The invention discloses a broadband liquid attenuator based on a T-shaped resistance network, and the attenuator comprises a grounding plate, a T-shaped resistance attenuation network which consists of a second liquid resistor and symmetrical first liquid resistors located at the left and right sides of the second liquid resistor, a gradual change transmission line 4 connected with the first liquid resistors, a parallel plate transmission line located between a feed port and the gradual change transmission line, and a water outlet and a water inlet located in the side face and the bottom faceof a transparent overall container structure respectively. Based on the T-shaped resistance attenuation network, the broadband liquid attenuator with the attenuation amount of 12 dB and the working frequency of DC3 GHz is achieved, and the fluctuation of an attenuation value within 2 GHz is not larger than 2.6 dB. A liquid attenuation material is adopted, the heat dissipation efficiency of the attenuator can be improved through a self-circulation system, a compact attenuator structure is achieved through the direct action of microwaves and circulating liquid, and the design can be used for large-power microwave measurement in the future.

Description

technical field [0001] The invention belongs to the field of radio frequency technology, in particular to a liquid attenuator. Background technique [0002] With the increasing development of wireless communication systems, people's requirements for microwave devices are increasing, especially for high-power microwave devices. The traditional attenuator is mainly designed based on the idea of ​​filling with solid attenuating material, the heat generation is concentrated, and the heat dissipation path is restricted in many aspects. When measuring high-power microwaves, especially in the field of aerospace, high-power transmitting devices are often involved. The heat generated by absorbing microwave energy during the test cannot be dissipated in a timely and effective manner, causing the temperature of the attenuating material to continue to rise until the attenuation At present, the attenuator mainly uses external water cooling or loads heat sinks to dissipate heat indirectl...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: Aiming at the above-mentioned prior art, a broadband liquid attenuator based on a T-type resistor network is proposed to solve the problems of traditional attenuators in terms of heat dissipation efficiency and working bandwidth.

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