Abstract: A basic cell of a microwave group delay line is disclosed for tuning the electromagnetic signal propagation delay time from signal source (1) to output (5), wherein two pairs of unequal-length stubs ((L1b, L1b), (L2b, L2b)) are placed on both sides of the main transmission path (2) in the signal layer and two pairs of complementary slot-lines ((L1t, L1t), (L2t, L2t)) are placed on both sides of the main transmission path (2) in ground plane for microstrip structure. Unequal-length stubs are placed in central layer and complementary slot-lines are placed in either outer conductor ground planes for strip-line structure. The characteristic impedances (Z0, 2Z1b, 2Z2b, 2Z1t, 2Z2t) of transmission paths are selected to control group delay time and minimize reflection of signals from signal source to output. A cascade connection of the basic cell forms a delay line system.

Abstract: A basic cell of a microwave group delay line is disclosed for tuning the electromagnetic signal propagation delay time from signal source (1) to output (5), wherein two pairs of unequal-length stubs ((L1b, L1b), (L2b, L2b)) are placed on both sides of the main transmission path (2) in the signal layer and two pairs of complementary slot-lines ((L1t, L1t), (L2t, L2t)) are placed on both sides of the main transmission path (2) in ground plane for microstrip structure. Unequal-length stubs are placed in central layer and complementary slot-lines are placed in either outer conductor ground planes for strip-line structure. The characteristic impedances (Z0, 2Z1b, 2Z2b, 2Z1t, 2Z2t) of transmission paths are selected to control group delay time and minimize reflection of signals from signal source to output. A cascade connection of the basic cell forms a delay line system.