High-sensitivity wireless receiving device and high-frequency unit used therefor

摘要

In a high sensitive radio receiver system for a diversity reception from two antennae per each of three sectors (SC 1 , SC 3 , SC 3 ), a series connection of a bandpass filter ( 3 ₁ to 3 ₆) and a low noise amplifier ( 4 ₁ to 4 ₆) is contained in each of a plurality of vacuum chambers ( 8 ₁ to 8 ₆), the interior of which is cooled by a distinct, separate cooling unit ( 9 ₁ to 9 ₆). The two antennae per sector are connected to bandpass filters contained in different vacuum chambers.