A Broadband Liquid Attenuator for High Power Microwave Measurement

A technology of microwave measurement and attenuator, which is applied in the field of radio frequency, can solve the problems of heat dissipation design and insufficient working bandwidth, and achieve the effect of good compact structure, stable performance and improved heat dissipation efficiency
CN111934074BActive Publication Date: 2021-05-07NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2021-05-07

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Abstract

The invention discloses a broadband liquid attenuator for high-power microwave measurement, which comprises a Π-type resistance attenuation network and a feed structure. In the present invention, the Π-type resistance attenuation network is composed of a first liquid resistance and a second liquid resistance located on both sides of the first liquid resistance. The feed part of the attenuator is implemented by using a coaxial feed connected to a parallel plate transmission line. Based on the brine Π-type resistance attenuation network, the invention realizes a broadband liquid attenuator with an attenuation of 12dB and a working frequency of DC-3GHz, and the fluctuation of the attenuation value within 2GHz is not more than 2.5dB. The invention adopts the liquid attenuation material to improve the heat dissipation efficiency of the attenuator through the self-circulation system, and realizes the compact attenuator structure through the direct action of the microwave and the circulating liquid, and the design can be used for future high-power microwave measurement.
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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 The attenuator is damaged. At present, the attenuator mainly uses external water cooling or loads heat sinks ...

Claims

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