Abstract
Failure mode characterization was applied to coplanar transmission lines by utilizing 0.5{10-GHz S-parameter measurements and post-calculated TDR (Time-Domain-Re∞ectometry) analysis. Coplanar waveguide transmission lines were inkjet-printed on 1.0-mm- thick ∞exible plastic RF substrates. Inductive, resistive, and capacitive types of failures | as the main failure modes caused by manufacturing, bending, or thermal cycling stresses | were investigated. The inkjet- printed CPW (Co-Planar Waveguide) lines were damaged by inductive shorts due to mechanical hitsor resistive and capacitive failures due to bending of the substrate. By using the TDR method the type and physical location of the failure can be determined.
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