ceramic resonator
Ceramic resonators are frequency-determining electronic components made of ferroelectric material. They are based on the piezo effect and can be excited to oscillate at certain frequencies, like quartz crystals.
The difference between ceramic capacitors and quartz crystals is their lower Q factors and lower oscillation stability. However, they are less expensive to manufacture and have smaller dimensions. Ceramic resonators can be used as frequency-determining components in oscillators and filters.
Ceramic resonators are based on the piezoelectric effect which states that electrical charges form on the surface of crystalline materials under compressive loads. This effect is reversible, which means that when voltages are applied to such crystalline ceramic materials, they bend or vibrate. The oscillating mass of the ceramic resonator corresponds to the oscillating circuit ofinductance and capacitance. The oscillation losses are reflected in the resonator's quality factor.
Due to the lower quality of the ceramic resonator, the resonance curve has a wider bandwidth compared to a quartz circuit.