Millimeter-Wave Between-Series Adapter, 1.0mm Plug to 1.35mm Plug
The 2385349-1: It is built for millimeter-wave test benches, instrumentation front-ends, and high-frequency lab setups where two different connector families need a low-reflection bridge. The adapter is straight, free-hanging (in-line), and uses threaded fastening on both ends — no panel mount, no right-angle bend. Rated to 90 GHz with a controlled 50 Ohm impedance, this adapter covers the full V-band and much of the W-band. Dielectric is PEEK, chosen for low loss and stable permittivity at millimeter-wave frequencies. Center contacts are beryllium copper with gold plating — a combination that holds up to 500 mating cycles without degrading return loss.
What the 90 GHz Rating Means for Your Test Setup
90 GHz is not a marketing ceiling — it is the frequency at which the adapter's VSWR and insertion loss still meet the design target. Below that, the adapter behaves as a near-transparent barrel between a 1.0mm and a 1.35mm interface. Above 90 GHz, mode conversion and dielectric losses climb quickly; this part is not specified there. For a system that only runs to 40 GHz or 67 GHz, the 90 GHz rating gives generous headroom — the adapter will contribute less phase ripple than a lower-rated part pushed near its limit.