| 摘要 |
A radio receiver, comprising a signal processing part having a receive band pass filter (2) and a receive low noise amplifier (3) processing receive signals and discharge gas with elapse of time, a cooling means (6) for cooling the signal processing part, an air-tight container (10) sealing the receive band pass filter (2) and receive low noise amplifier (3) therein in vacuum state to retain the gas therein and operating as an inside sealing means, and a vacuum container (5) sealing the air-tight container (10) in vacuum state so that a clearance (12) thereof from the air-tight container (10) forms a vacuum insulating layer and operating as an outside sealing means for vacuum insulation thereof from the outside.
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