frequenzgebundener

Frequenzgebundener is a German adjectival term used to describe quantities, phenomena, or devices whose behavior depends on the frequency of an excitation. It denotes a relationship between a response and the excitation frequency, in contrast to properties that remain constant across frequencies. The expression is common in technical and scientific contexts, especially where wave-like or dynamic behavior is relevant.

In electrical engineering and signal processing, frequenzgebundene Parameter are described by a frequency-dependent transfer function H(f) or impedance Z(f). In acoustics, the concept appears for frequency-dependent attenuation, sound speed, and acoustic impedance. In optics and condensed matter physics, dispersive effects lead to frequenzgebundene quantities such as the complex permittivity ε(ω) and refractive index n(ω). In materials science, dielectric and magnetic responses often vary with frequency, making ε(ω) and μ(ω) frequenzgebundene properties.

The term is typically used descriptively; many authors use frequenzabhängig (frequency-dependent) as a synonym. Notation commonly employs frequency f or angular frequency ω, with responses written as R(f) or R(ω). Understanding frequenzgebundene behavior is essential for designing systems that operate over a range of frequencies, such as filters, antennas, sensors, and transmission lines. The concept highlights dispersion and the dynamic nature of real-world systems, where performance cannot be assumed constant across all frequencies.