A heat-dissipating and reconfigurable frequency selection device based on liquid metal

Abstract

The invention discloses a liquid-state metal-based reconfigurable frequency selection device capable of dissipating heat, and relates to the technical field of electronic products. The device comprises a top-layer frequency selection array, a bottom-layer frequency selection array, wall plates, liquid-state metal inlet and outlets, a cover plate, a middle isolation layer and a bottom plate, wherein the top-layer frequency selection units in each row of the top-layer frequency selection array are aligned in the horizontal direction, the bottom-layer frequency selection units in each row in thebottom-layer frequency selection array are aligned in the horizontal direction, the top-layer frequency selection units in each column of the top-layer frequency selection array are aligned in the vertical direction, the bottom layer frequency selection units in each column of the bottom-layer frequency selection array are aligned in the vertical direction, the wall plates are fixed around the top-layer frequency selection array and the bottom-layer frequency selection array, so that heat accumulation on the surface of a radome is reduced, the heat dissipation effect is improved, normal work of the frequency selection surface can be ensured, and the radome can normally work under various different working frequency requirements.

Description

technical field [0001] The invention relates to the technical field of electronic products, in particular to a heat-dissipating and reconfigurable frequency selection device based on liquid metal. Background technique [0002] With the development of science and technology, the integration of electronic devices in the antenna system is getting higher and higher, especially the emergence of active antennas, and the heat dissipation problem of higher power antenna systems has attracted more and more attention. At the same time, when the aircraft enters the troposphere, the heat generated by friction is very huge, and the heat flux density can reach 1000W / cm 2 Above, in order to ensure the normal operation of the internal electronic equipment, a strong cooling capacity is also required. In addition, frequency selective surfaces are widely used in aircraft stealth and protection of airborne antennas. [0003] Frequency selective surfaces are usually periodic structures consist...

AI Technical Summary

Problems solved by technology

For example, the invention patent with the patent number 201510200529.2 discloses a frequency selective surface formed by periodic arrangement of square sheet units with a square hole in the center. Although the frequency selective surface can well cover the 2-18GHz frequency band, and The S11 parameter value of the pass part is less than -15dB, which can achieve ultra-broadband wave absorption, but the negative effect is that it intensifies the heat accumulation on the surface of the radome, reduces the heat dissipation effect, and affects the normal operation of the frequency selection surface

At the same time, the single-layer frequency selective surface generally can only work at a single frequency, which cannot meet the requirements when frequency reconfigurability is required

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