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• n  a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves
• n  an electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude
• n  any system that resonates

• Michael Idvorsky Pupin, Serb immigrant boy, now professor of electromechanics, Columbia University; inventor of electrical "tuning," the resonator, inductance coil, etc.
• The microwaves are bounced off the resonator, carrying the vibrations back to the eavesdropper's receiver.

• cavity resonator
• resonating chamber
• resonant circuit

News & Articles

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• RF Source provides true sinewave output with low phase noise.
  Designed using surface acoustic wave resonator technology, 2 GHz Model CRFS75-2000 features -134 dBc/Hz phase noise at 10 KHz offset and noise floor of -164 dBc/Hz. Source has no sub-harmonics; second harmonic is -20 dBc typical, and frequency accuracy is rated at ±150 ppm. With 5 V input voltage, device generates true sinewave with +5 dBm minimum output power. Housed in 0.75 x 0.75 in. SMT ...
  June 10, 2013 - ThomasNet

Quotes

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• Robert Ulrich in Los Angeles Times
  When you talk about musical instruments,Ulrich said, "who wouldn't want to hit a great big gong from Indonesia, a gamelan from Bali, or pluck at a harp from Peru or play a resonator marimba from Africa. It's just so cool to have that kind...