noun
resonator; cavity resonator
Technical term in electronics for a device or structure that exhibits resonance, often used in microwave circuits, filters, and oscillators.
このマイクロ波回路には共振器が組み込まれている。
A resonator is incorporated into this microwave circuit.
共振器のQ値が高い
The higher the Q factor of the resonator, the better the selectivity.
発振器 (oscillator) actively generates a signal, while 共振器 passively resonates at a specific frequency.
Compound of 共振 (resonance) + 器 (device, instrument). The exact historical derivation is uncertain, but the term follows standard technical word formation patterns.