A capacitor includes a first electrode, a dielectric layer, and a second electrode that are sequentially stacked. The present disclosure provides improved systemsmethods for the design and use of modular cable management spool assemblies configured to mount with respect to media patching systems. Typically, the steps of the method and system are performed at one instant thereby preventing unauthorized access to the material when it is in a descrambled or decrypted form. The filter controller uses a low pass filter functioning as a peak detector to detect peaks in either the input or output voltage of the high pass filter. A part of the resonator constitutes one of the walls of the sensing chamber and is arranged such that the first electrode is situated inside the sensing chamber.