This patent application is being concurrently filed with commonly owned utility U.S. patent application Ser. No. 12/590,145, entitled “Noise-cancelling Down-Converting Detector”, by Grant E. Moulton, Steven H. Goody, and Christopher E. Stewart; and with commonly owned utility U.S. patent application Ser. No. 12/590,117, entitled “Method of Down Converting High-frequency Signals”, by Christopher E. Stewart, Grant E. Moulton, and Steven H. Goody; and with commonly owned utility U.S. patent application Ser. No. 12/590,116, entitled “Continuous-Wave Field Disturbance Sensing System”, by Christopher E. Stewart, Grant E. Moulton, and Steven H. Goody.
Any broken line illustration of structure in the drawing is not part of the design sought to be patented.