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The Impact of Conductor Surface Profile (Rrms) on Total Circuit Attenuation in Microstrip and Stripline Transmission Lines
Transmission line attenuation is known to be influenced by conductor surface profile (Rrms), an effect that worsens as frequency increases. Using microstrip transmission lines, copper conductive losses are characterized from 0.03 – 30 GHz in low loss materials incorporating various copper types and tracewidths. Differing copper types are also evaluated in stripline structure using the Bereskin method. Such comparison allows the relationship between Rrms and conductor loss to be quantified. The advantages of packaging low loss materials with low profile copper foil are discussed.
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