vysokofrekvenními
Vysokofrekvenčními is the instrumental plural form of the Czech adjective vysokofrekvenční, meaning “high-frequency.” It is used to modify nouns in the instrumental case, for example s vysokofrekvenčními zařízeními (with high‑frequency devices) or vysokofrekvenčními signály (high‑frequency signals).
In technical and scientific contexts, the term designates properties, technologies, or methods that operate at high
Etymology and usage notes: the word combines vysoký (high) with frekvence (frequency) and the suffix -ční, yielding
See also terms related to frequency in Czech, such as frekvence, radiofrekvenční, a mikrofrekvenční, to place