A tunable chirped delay line arrangement (0) configured to operatively propagate a signal and includes a at least one chirped delay line (1) arranged along a reference direction (z) on a dielectric layer (2) arranged on a ground plane (3). The chirped delay line (1) is configured with a smoothly varying width along the reference direction (z), and the arrangement (0) further comprising at least one electronically tunable impedance (5) interconnecting the at least one delay line (1) and the ground plane (3) at at least one location along the reference direction (z) such that the at least one delay line (1) is loaded by the tunable impedance (5).