Patent ID: 6480706
Filing Date: 2002-11-12
Classification: H01Q,H04B

Abstract:
A high sensitivity radio receiver comprising:an antenna formed by n antenna elements where n is an integer equal to or greater than 2; n element feeders connected to respective antenna elements; n phase shifters connected to the n element feeders for controlling phases of signals received by corresponding antenna elements by a respective predetermined amount; n reception filters connected to the outputs of the n phase shifters for selecting a signal in a desired reception frequency band to be passed therethrough; n low noise reception amplifiers for providing a low noise amplification of output signals from the n receiving filters to respective desired levels; a combiner for combining output signals from the n low noise reception amplifiers to feed an output terminal; a cryostat in which the n phase shifters, the n receiving filters, the n low noise reception amplifiers and the combiner are confined; and cooling means for cooling down the n phase shifters, the n receiving filters, the n low noise reception amplifiers and the combiner confined in the cryostat.