Millimeter wave multi-pixel refrigeration receiver dewar
A technology of millimeter wave and receiver, which is applied in the field of dewar of multi-beam receiver of low-temperature refrigeration in the millimeter wave band, which can solve the problem of high cooling power requirements and achieve the effect of reducing heat radiation and cooling power requirements
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[0020] like figure 1 As shown, the millimeter-wave multi-pixel receiver Dewar includes a vacuum chamber 1 and a cold screen 2 disposed in the vacuum chamber, and an array composed of nine detectors of the 9-pixel millimeter-wave cooling receiver is located on a 4K cold stage 3, Between the 4K cold stage 3 and the vacuum chamber 1 is a cold shield 2 with a temperature of 50K. The material of the cold screen is copper, and the inner and outer surfaces are polished and chrome-plated to reduce emissivity. There are 9 independent circular windows 10 on the top of the cold screen, see figure 2 , each circular window corresponds to a detector. The diameter of the window is equal to the -30dB edge taper of the detector beam at the position of the cold screen window, so that the occlusion of the window to the beam is limited to the allowable range, so that the detected millimeter wave signal can pass through these windows almost without occlusion and reach the detector .
[0021] ...
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