Radio frequency receiver

In combination:

• (a) means for directing signals to a plurality of primary signal channels, each one of such channels passing different bands of frequencies;
• (b) means for separating each one of the plurality of primary signal channels into a pair of secondary signal channels;
• (c) means for converting the frequencies of signals in a first one of the secondary signal channels in each of the pairs of secondary signal channels to frequencies within a predetermined band of frequencies;
• (d) means, responsive to the frequency converted signals, for coupling signals in a selected minor portion of the predetermined band of frequencies to an output;
• and
• (e) a plurality of mixers, each one being coupled to the output and each one being coupled to a corresponding one of the second one of the pair of secondary signal channels of the plurality of primary signal channels.

In combination:

• (a) means for directing signals to a plurality of primary signal channels, each one of such channels passing different bands of frequencies;
• (b) means for separating each one of the plurality of primary signal channels into a pair of secondary signal channels;
• (c) means for converting the frequencies of signals in a first one of the secondary signal channels in each of the pair of secondary signal channels to frequencies within a predetermined band of frequencies;
• (d) means, fed by the converting means and responsive to the frequency converted signals, for passing signals in a plurality of different portions of the predetermined band of frequencies;
• (e) means, fed by the signals passed by the passing means, for detecting signals passed by the plurality of different portions of the predetermined band of frequencies;
• (f) means, responsive to the detector means, for coupling signals passing through a selected one of the different portions of the predetermined band of frequencies of the passing means to an output;
• and
• (g) a plurality of mixers, each one being coupled to the output and each one being coupled to a corresponding one of the second one of the pair of secondary signal channels of the plurality of primary signal channels.

A radio frequency signal detection system wherein a first portion of a received signal is fed to a mixer through a first signal channel and a second portion of the received signal is fed to the mixer through a second signal channel, such second signal channel comprising:

• (a) bandpass filter means, responsive to the received signal, for passing signals in a plurality of different portions of a predetermined band of frequencies;
• (b) detector means, fed by signals passed by the bandpass filter means, for detecting signals passed by the plurality of different portions of the predetermined band of frequencies;
• and
• (c) means, responsive to the detector means, for coupling signals passing through a selected one of the different portions of the predetermined band of frequencies of the filter means to the mixer;
• and
• wherein the system includes means, coupled to the mixer, for detecting signals produced in response to the signals fed to such mixer from both the first and second signal channels.

In combination:

• (a) means for coupling signals within a predetermined band of frequencies to a pair of signal channels, a first one of such pair of signal channels comprising:
• (i) bandpass filter means, fed by the signals coupled to the first one of the pair of signal channels, for passing therethrough signals in different portions of the predetermined band of frequencies;
• (ii) detector means, fed by signals passed through the bandpass filter means, for detecting signals passing through the different portions of the predetermined band of frequencies of the bandpass filter means;
• and
• (iii) means, responsive to the detector means, for coupling signals passing through a selected one of the different portions of the predetermined band of frequencies of the filter means to an output of the first one of the pair of signal channels;
• (b) a mixer;
• and
• (c) means for coupling a second one of the pair of signal channels and the output of the first one of the pair of signal channels to the mixer.