Broadband liquid attenuator for high-power microwave measurement

A microwave measurement and attenuator technology, applied in the radio frequency field, can solve the problems of heat dissipation design and insufficient working bandwidth, and achieve the effects of good compact structure, improved heat dissipation efficiency, and stable performance

Active Publication Date: 2020-11-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Purpose of the invention: Aiming at the above-mentioned prior art, a broadband liquid attenuator for high-power microwave measurement is proposed to solve the problems of traditional attenuators in terms of heat dissipation design and working bandwidth.

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  • Broadband liquid attenuator for high-power microwave measurement
  • Broadband liquid attenuator for high-power microwave measurement
  • Broadband liquid attenuator for high-power microwave measurement

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Embodiment Construction

[0022] The present invention will be further explained below in conjunction with the accompanying drawings.

[0023] Such as figure 1 , figure 2 , Figure 8 , Figure 9 As shown, a broadband liquid attenuator for high-power microwave measurement, the broadband liquid attenuator is a symmetrical three-dimensional structure, including a ground plate 1, a first liquid resistor 3 located above the ground plate 1, and two sides of the first liquid resistor 3 The second liquid resistor 2 on the side also includes a gradient transmission line 4, a parallel plate transmission line 5, a feed port 6, a water inlet 8, and a water outlet 9.

[0024] Such as Figure 4 As shown, the first liquid resistor 3 is an I-shaped structure, and the second liquid resistor 2 is composed of an inclined rectangular pyramid structure at the top and bottom and a rectangular prism structure in the middle. The first liquid resistor 3 is respectively connected to the top inclined quadrangular pyramid s...

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Abstract

The invention discloses a broadband liquid attenuator for high-power microwave measurement. The broadband liquid attenuator comprises a Pi-shaped resistance attenuation network and a feed structure. In the invention, the Pi-shaped resistance attenuation network is composed of a first liquid resistor and second liquid resistors located on the two sides of the first liquid resistor. The feed part ofthe attenuator is realized by connecting coaxial feed with a parallel plate transmission line. According to the invention, based on the saline Pi-shaped resistance attenuation network, the broadbandliquid attenuator with the attenuation amount of 12dB and the working frequency of DC-3GHz is achieved, and the fluctuation of the attenuation value within 2GHz is not greater than 2.5dB. The 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 high-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 The attenuator is damaged. At present, the attenuator mainly uses external water cooling or loads heat sinks ...

Claims

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Application Information

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IPC IPC(8): H01P1/22H01P1/30
CPCH01P1/22H01P1/30
Inventor 严丹丹邢蕾张国轩徐千
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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