Patent ID: 6862442

Claim:
A receiver comprising: a phased array antenna comprising first and second antenna elements for receiving a radio signal; and a phase shifter for shifting, by a predetermined amount, the phase of a signal received by the first antenna element; a local signal generator for generating a local signal with a predetermined frequency; and a direct conversion demodulator comprising: first generating means which is supplied with the received signal output from the phase shifter of the phased array antenna and the local signal generated by the local signal generator and which generates two signals different in phase on the basis of at least one of the supplied signals and outputs at least one of the generated signals; second generating means which is supplied with the received signal output from the second antenna element of the phased array antenna and the local signal generated by the local signal generator and which generates two signals different in phase on the basis of at least one of the supplied signals and outputs at least one of the generated signals; at least one signal combiner for combining corresponding signals output from the first generating means and the second generating means; at least one power detector for detecting the signal level of a signal output from the signal combiner; and a converter for converting the signal output from the power detector on the basis of a predetermined parameter so as to obtain a plurality of signal components contained in the received signal or the local signal.