Ultra Phase Stable Interconnect Advancements

Phase stability is the single most important performance parameter for RF cable assemblies used in vector network analyzers, phased array radar systems, and satellite payloads. When a cable's electrical length changes with temperature or mechanical position, it introduces phase error that cannot be separated from the device under test's actual response. Junkosha's latest phase-stable interconnect advances address this problem at its source — the dielectric material's behavior under thermal and mechanical stress.\n\nThe ePTFE tape-wrapped dielectric used across Junkosha's EMF series maintains a more consistent velocity of propagation across temperature than any conventional fluoropolymer dielectric. The tape-wrapped construction also isolates the signal conductor from the mechanical stress of cable bending, so flex-induced phase changes are reduced versus cables with solid or stranded dielectric fills.\n\nFor VNA port cables, phase stability directly determines measurement uncertainty. A cable that shifts 5 degrees of phase under repositioning introduces a systematic error that cannot be removed by calibration. Junkosha specifies maximum phase deviation under defined bend conditions across the full frequency range of each EMF model — a specification that most cable suppliers do not provide.\n\nFor radar and satellite applications, matched phase performance across antenna array feed lines is a system-level requirement. Junkosha's phase-matched pairs, available across the EMF series, provide the matched-delay guarantee that antenna array designers need.\n\nKoto Electronics supplies the full EMF phase-stable cable range in Israel. Contact us to discuss your frequency range, temperature profile, and phase stability budget.