DIELECTRIC LOSS COMPENSATION METHODS AND APPARATUS

摘要

Multilayer circuit boards include compensator networks (302) configured in one or more conductor layers. A signal trace (314, 316) is configured in one or more layers to transmit an electrical signal from an input to an output and the compensator network (302) is situated at least one location on the trace to provide compensation for frequency dependent signal propagation losses or distortions such as those due to dielectric loss. In one example, the compensator includes a high frequency path provided by a series capacitance (302) formed by conductor layers that include interleaved digits (316, 318, 320, 322, 324). Transmitters that include such compensators provide predistorted signals that can be matched or otherwise associated with anticipated propagation losses and distortions. Methods of evaluating dielectric losses include propagating electrical signals through such compensators and along a trace defined with respect to a dielectric under test and determining an associated compensation.