| 摘要 |
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. |
| 主权项 |
1. A basic cell consisting of a plurality of multiple pairs of open stubs and multiple pairs of complementary slot lines being non-parallel, wherein said multiple pairs of open stubs ((L1b, L1b), . . . , (Lnb, Lnb)) (n is a positive integer) are printed conductor wires in a signal layer of a printed circuit board, and the multiple pairs of complementary slot lines ((L1t, L1t), . . . , (Lnt, Lnt)) are line areas in ground planes, where the conductor of the ground planes is removed;
wherein each open stub of the multiple pairs of said open stubs ((L1b, L1b), (L2b, L2b)) is associated with a corresponding complementary slot line of the multiple pairs of said complementary slot lines ((L1t, L1t), (L2t, L2t)) thereby forming a multilayer structure; wherein each of the multiple pairs of said open stubs ((L1b, L1b), (L2b, L2b)) and each of the multiple pairs of said complementary slot lines ((L1t, L1t), (L2t, L2t)) has a parallel portion and a non-parallel portion, each parallel portion of the multiple pairs of said open stubs ((L1b, L1b), (L2b, L2b)) and the multiple pairs of said complementary slot lines ((L1t, L1t), (L2t, L2t)) has an unequal-length; each non-parallel portion of the multiple pairs of said open stubs ((L1b, L1b), (L2b, L2b)) and the multiple pairs of said complementary slot lines ((L1t, L1t), (L2t, L2t)) cross and are connected at a same location. |
