Distributed array for direction and frequency finding

A receiver comprising:

• a phased-array antenna array including a plurality of antennas, each antenna configured to receive a radio frequency (RF) electromagnetic signal from at least one RF source in an RF scene and to output a corresponding RF electrical signal;
• an RF coupler having a plurality of inputs and a plurality of outputs;
• a plurality of RF waveguides to provide a plurality of RF electrical signal paths, each RF electrical signal path extending between each antenna to the RF coupler, wherein effective lengths of the RF electrical signal paths are different for at least a majority of the plurality of RF electrical signal paths, wherein the RF waveguides each provide a corresponding RF electrical signal as an input to the RF coupler;
• a plurality of RF detectors, each coupled to an output of the RF coupler and configured to provide an output corresponding to the power of an RF signal received from the corresponding output of the RF coupler;
• and
• a processor configured to determine frequency and location information of the at least one RF source as a function of the outputs of the RF detectors,
• wherein the RF coupler is configured to provide coupled outputs, each coupled output comprising the coupling of plural ones of received RF electrical signals from the plurality of RF waveguides.