What Is a Coaxial Filter?
A coaxial filter is a crucial electronic component designed to filter high-frequency signals.
This component’s functionality hinges on resonance circuits and the principles of transmission line theory. Within the coaxial structure, an LC resonance circuit is established, allowing only a selected frequency band to resonate while suppressing others. Conversely, the transmission line theory leverages the coaxial cable’s characteristic impedance to facilitate the passage of signals within certain frequency ranges.
Such filters find their applications in eliminating undesirable frequency bands in both transmission and reception phases. They are pivotal in the realm of television and radio broadcasting, ensuring that only the designated frequency bands are transmitted. Distinguished by their compatibility with high frequencies, these filters also boast a compact and lightweight design, cost-effectiveness, and a broad variety of types to accommodate different needs.