In a high sensitive radio receiver system for a diversity reception from two
antennae
per each of three sectors (SC1, SC3, SC3), a series connection
of a bandpass filter (31 to 36) and a low noise
amplifier (41 to 46) is contained in each of
a plurality of vacuum chambers (81 to 86),
the interior of which is cooled by a distinct, separate cooling unit (91
to 96). The two antennae per sector are connected to bandpass
filters contained in different vacuum chambers.
