A low-loss high-vacuum-sealed heat-insulated transmission window for millimeter-wave frequency bands

Abstract

The invention relates to a low-loss, high-vacuum sealed and heat-insulated transmission window for the millimeter wave frequency band, comprising a multi-layer dielectric window and a sealing upper flange and a sealing lower flange respectively installed on the upper and lower sides of the edge of the multi-layer dielectric window; The layered dielectric window includes a first tetrafluoro layer, a quartz layer, a second tetrafluoro layer and a thermal insulation layer arranged in sequence from outside to inside. The invention can not only effectively reduce the transmission reflection loss of electromagnetic wave signals, improve the problem of a large number of interference bands in the existing window, but also greatly improve the vacuum sealing performance, and solve the problem of limited use of the sealed wave-transmissive window of the traditional cryogenic receiver / superconducting receiver , and has a good heat insulation effect, effectively reducing heat radiation.

Description

technical field [0001] The invention relates to the technical field of microwave signal transmission window components, in particular to a low-loss, high-vacuum-sealed and heat-insulated transmission window for a millimeter-wave frequency band. Background technique [0002] The sealing window is mainly used for the transmission of light and the transmission of microwave signals, and has the ability of vacuum sealing. At present, the sealed window technology is mainly used in infrared detectors, cryogenic receivers, and superconducting receivers. [0003] In infrared applications, the sealing window is mainly made of sapphire material, which requires good light transmittance and maintains a good degree of vacuum, but the dielectric constant of the sealing window is relatively large, which is usually not suitable for the transmission of microwave signals. [0004] For microwave transmission windows for cryogenic receivers / superconducting receivers, the commonly used materials...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-loss high-vacuum sealed heat-insulated transmission window for the millimeter wave frequency band, which can not only effectively reduce the transmission reflection loss of electromagnetic wave signals, improve the problem of a large number of interference bands in the existing window, but also greatly improve the Vacuum sealing performance, solves the problem of limited use of sealed wave-transparent windows of traditional cryogenic receivers / superconducting receivers, and has good heat insulation effect, effectively reducing heat radiation

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