A structure is provided. The structure includes a signal retrieval circuit formed within a disk located within a coaxial cable connector. The signal retrieval circuit is located in a position that is external to a signal path of an electrical signal flowing through the coaxial cable connector. The signal retrieval circuit is configured to extract an energy signal from the electrical signal flowing through the coaxial cable connector. The energy signal is configured to apply power to an electrical device located within the coaxial cable connector. The sensing circuit is configured to sense physical parameter such as condition of the RF electrical signal flowing through the connector or presence of moisture in the connector. The structure may include an integrated circuit configured to convert the parameter signal into a data acquisition signal readable by the integrated circuit.