Parametric optimization of protective turn of meander line with broad-side coupling

Detailed review of the investigations of meander delay lines as the protective devises against ultrashort pulses is carried out in the paper. The review examined the lines with the edge and broad-side coupling. Estimation of influence of cross section parameters of meander line turn with broad-side coupling on the difference of per-unit-length delays of even and odd modes of the line and on geometric mean of their impedances is carried out. According to evaluation and optimization results, for design of meander lines prototypes we set cross section parameters which correspond to matching the line with the tract of 50 Ohm aimed to minimize the reflections in the measuring tract in the full-scale experiment execution. The line length permitting to decompose ultra short pulse with duration of 100 ps is calculated.