Signal Integrity Design for Multi-Stage Cascaded Transmission Line Based on an Inversion Algorithm

The proper handling of signal integrity (SI) issues constitutes a critical factor in high-speed printed circuit board (PCB) design. Optimization of reflection problems represents a key focus within SI research. This paper investigates the relationship between signal integrity and the design of multi-stage cascaded transmission line, grounded in microwave transmission theory and an inversion algorithm, utilizing an impedance matching model through the analysis of multi-stage transmission line reflection. Owing to its simplicity and convenience in analyzing cascaded transmission lines, an inverse algorithm is firstly implemented to realize a bandwidth matching algorithm for cascaded transmission line. Subsequently, bandwidth matching performance is simulated sequentially for single-stage, two-stage, and three-stage cascaded transmission lines to examine the impact of stage number selection on bandwidth matching effectiveness.