Abstract: The filter is composed of a series of cells (E1-E4) Coupled to each other by coupling capacitors (Cc12, Cc23 and Cc34), each cell forming a resonant circuit composed of at least one inductor (Ip1-Ip4) connected in parallel with at least one variable capacitor (Cp1-Cp4). The coupling capacitors (Cc12, Cc23 and Cc34) are variable capacitors. The filter is substantially symmetrical between its signal input (FI) and its signal output (FO). It finds applications notably for the transmission of channels in the UHF band, where it provides frequency agility.

Abstract: The invention relates to digital signal terrestrial transmission systems operating in accordance with the MPEG2-TS standard and the DVB-T standard.