Appropriate choice of Capacitive sensor bandwidth

To optimize the accuracy of a capacitive sensor, a suitable choice of frequency margin is essential. The frequency margin refers to the difference between the resonant frequency of the sensor and the operating frequency. The choice of frequency margin should consider the material properties of the target being sensed. Different materials have varying dielectric constants, which affect their capacitance. A wider frequency margin may be required for materials with high dielectric constants to ensure accurate measurements.