Apparatus and method supporting covert communications using terahertz imaging camera

A system comprising:

• a first communication device comprising:
• a link receiver comprising a detector array configured to receive first radiation from a second communication device, the detector array comprising multiple detectors, each detector comprising:
• a horn receiver configured to capture the first radiation using an antenna positioned in or proximate to a throat of the horn receiver, the antenna coupled to an antenna load;
• and
• a bolometer electrically isolated from the antenna load and in thermal contact with the antenna load;
• a link transmitter configured to transmit second radiation to the second communication device;
• and
• a communication transmitter/receiver configured to communicate with the second communication device.

A method comprising:

• identifying, at a first communication device, angular coordinates to a second communication device using a link receiver at the first communication device;
• and
• communicating with the second communication device using a communication transmitter/receiver of the first communication device;
• wherein the link receiver comprises a detector array configured to receive radiation from the second communication device, the detector array comprising multiple detectors, each detector comprising:
• a horn receiver configured to capture the radiation using an antenna positioned in or proximate to a throat of the horn receiver, the antenna coupled to an antenna load;
• and
• a bolometer electrically isolated from the antenna load and in thermal contact with the antenna load.