Microwave cables and assemblies - Nkt-rf.ru

SUCOFLEX 100Phase matchingDefinitionThe term "phase matching" refers to the relative electrical length of an assembly compared with a referencecable or a given electrical length.Relative electrical lengthrelative to the reference cableReference planeSignalReference cableMechanical assembly lenght l mAvailabilityAll SUCOFLEX P-type microwave cable assemblies are available as phase-matched sets. Their outstanding thermaland mechanical phase stability makes them the ideal choice for applications requiring high stability.Any required matching values are available on request, although they are limited. The reproducibility of theelectrical characteristics of the connectors in addition to thermal and mechanical influences limit the matchingrange attainable in practice to ± 0.2° per GHz/m, equivalent to a mechanical length of ± 0.13 mm. In longassemblies, the thermal and mechanical influencing factors have a greater impact, resulting in a rise of the lowerlimit of matchability as the length increases (see graph next page). In day-to-day practice, we find that it is betterto speak of a specification window than of a tolerance. As a consequence, a statement such as "within 0.4° perGHz/m" makes more sense than "± 0.2° per GHz/m". This applies in particular to assembly sets consisting ofmore than two individual assemblies.SUCOFLEX 100HUBER+SUHNER microwave cables and assemblies 133