Resonator

A resonator is a device or system that exhibits resonance or resonant behavior. Many objects that use resonant effects are referred to simply as resonators. Examples of resonators are discussed in this article. A cavity resonator is a resonator composed of a space that is typically bounded by a dielectric that uses resonance to select a specific band of frequencies.
A distributed parameter resonator of the distributed network kind has capacitance, inductance, and resistance which cannot be isolated into separate lumped capacitors, inductors, or resistors. The time factor of spread of wave energy in the network is appreciable. Resonators can be of the dielectric type or magnetic type. A hollow conductor that uses resonance to increase an electromagnetic wave is called a cavity resonator. In the context of electronic components, resonator may refer to a ceramic resonator, a device used to create an oscillation of a specific frequency, first and foremost for use as the clock signal for digital circuits. A single layer coil (or solenoid) that is used as a secondary or tertiary winding in a Tesla Coil or Magnifying Transmitter is also called a resonator.