有损传输线的实际特性Application Note Practical Characterization of Lossy Transmission Lines Using TDR Introduction Losses in digital interconnects were not very important at the lower frequencies, but as the communications and computer system designs are moving into the gigahertz territory, this picture changes rapidly. High-frequency effects such as skin effect and dielectric loss begin to affect signal integrity in these high-speed digital systems in the most profound manner, and therefore must be understood and characterized. 36 inch long microstrip in FR4. This length is often found in backplanes that have daughtercards connected. Effect of Losses on Signal Propagation DC losses, arising from the DC resistance of the conductor in the digital interconnect, will mainly affect the amplitude of the signal a……