Broadband liquid attenuator based on T-shaped resistance network

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

Active Publication Date: 2020-11-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

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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 resist...

Method used

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  • Broadband liquid attenuator based on T-shaped resistance network
  • Broadband liquid attenuator based on T-shaped resistance network
  • Broadband liquid attenuator based on T-shaped resistance network

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Embodiment Construction

[0026] The present invention will be further explained below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, a broadband liquid attenuator based on a T-shaped resistor network, the broadband liquid attenuator is a symmetrical three-dimensional structure, including a ground plate 1, a first liquid resistor 2, a second liquid resistor 3, a gradient transmission line 4, and a parallel plate transmission line 5. Feed port 6, transparent plate 7, water inlet 8, water outlet 9.

[0028] Both the tapered transmission line 4 and the parallel plate transmission line 5 include a positive plate, and the ground plate 1 serves as a negative plate of the tapered transmission line 4 and the parallel plate transmission line 5 at the same time. Such as Figure 3 to Figure 9 As shown, the left and right sides of the second liquid resistor 3 are respectively connected with symmetrical first liquid resistors 2 . The first liquid resistor 2 is a triangular pri...

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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...

Claims

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Application Information

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IPC IPC(8): H01P1/22H01P1/30
CPCH01P1/22H01P1/30
Inventor 严丹丹邢蕾王海龙徐千
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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