Rohde & Schwarz added the R&S NRP90T und R&S NRP90TN models to its portfolio of thermal power sensors, presented as the first test and measurement instruments in the market to support the novel, robust 1.35 mm precision coaxial connector. The connector covers frequencies up to 90 GHz, and shall be included in the next releases of both IEEE and IEC relevant standards. Emerging applications in particular include automotive radar from 76 to 81 GHz, and the WiGig extension IEEE 802.11ay operating up to 71 GHz.
These and others highlight the need for a novel, robust coaxial cable connector suitable for industrial applications at frequencies up to 90 GHz. Rohde & Schwarz has been a partner in the 1.35 mm E connector development project since its beginning in 2017. The group consists of Germany's national metrology institute, the Physikalisch-Technische-Bundesanstalt (PTB), Rohde & Schwarz, Rosenberger Hochfrequenztechnik, and SPINNER.
The result is the 1.35 mm E connector, with a precise metric fine thread, a reliable pin-gap, and an integrated groove for optional push-pull locking. The design was accepted in 2019 for the next edition of the IEEE 287-2007 for precision coaxial connectors, and also by the IEC, which will publish it as the IEC 61169-65. The E connector closes the gap between the 1.85 mm V-band connector and the 1.00 mm W-band connector. The V-band connector is suitably robust for industrial applications, but is restricted to a maximum frequency of 70 GHz. The W-band connector supports a maximum frequency of 110 GHz, but requires a fine-mechanical accuracy during assembly, and frequently loosens in use.
The R&S NRP90T and R&S NRP90TN for frequencies up to 90 GHz are the latest additions to the thermal power sensor family. The R&S NRPxxT power sensors operate locally, connected to a PC, selected Rohde & Schwarz instruments, or an R&S NRX base unit. The R&S NRPxxTN sensors can also be operated remotely via a LAN.
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