Abstract: A system and method for distribution of RF communication signals. First RF communication signals are downconverted in a first signal processing subsystem and transmitted to a second signal processing subsystem via twisted-pair cable. The downconverted first RF communication signals are upconverted at the second signal processing subsystem to provide recovered first RF communication signals, and the recovered first RF communication signals are transmitted via an antenna. Operating power for the second signal processing subsystem is provided from the signal processing subsystem, and the second signal processing subsystem determines the occurrence of an event and transmits autonomous information signals thereabout to the first signal processing subsystem.

Abstract: Precise capacitive coupling to a coil is provided by a coil form having a central winding portion for a coil and having transverse flanges at the ends of the winding portion. The flanges are shaped and dimensioned to fit in a structure or resonant cavity, and have facing grooves for receiving and holding a sheet of insulating material in a plane substantially parallel to the coil winding portion. A metallic plate of predetermined size and location is positioned on the insulating sheet, and provided with a connection to an external circuit. The metallic plate provides capacitive coupling to a coil wound on the winding portion. This coupling is of predetermined magnitude and repeatable consistency, since identical coil forms can be made to hold their respective insulating sheets and metallic plates in the same location.