Patent ID: 8269168

Claim:
A circuit for detecting electromagnetic radiation which comprises: a) A detector comprising a continuous conductive 2-D Hilbert space filling curve having at least a first and second terminal for receiving electromagnetic radiation of a predetermined first frequency, b) a ground plane separated from the detector by a dielectric layer, the ground plane being connected to at least one terminal of said detector, c) a mixer having at least two input terminals and an output terminal, at least one input terminal connected to the other terminal of the detector not connected to said ground plane of said detector, said mixer being further in signal communication with d) a local oscillator having an output connected to the other input of said mixer, e) a low pass filter connected to the output terminal of said mixer, wherein said local oscillator operative to be tuned to a frequency (f o ) which is close to the first frequency of the detector, whereby the output from the circuit includes a power spectrum of signal and phase information about the electromagnetic radiation received at said detector.