Test Instruments With New 1.35 mm E-band Coaxial Connector

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  • The test equipment by Rohde & Schwarz cover frequencies up to 90 GHz
  • They integrate a new coaxial connector for reliable measurement of industrial applications

The new R&S NRP90T and R&S NRP90TN by Rohde & Schwarz are the latest additions to its thermal power sensor family. The models can operate for frequencies up to 90 GHz and feature high accuracy at fast speeds for thermal power measurements. The R&S NRPxxT power sensors can either operate locally, connected to a PC, selected Rohde & Schwarz instruments or an R&S NRX base unit, or remotely via a LAN.

Initial developments

Earlier, a joint project to develop and implement a new coaxial connector optimized for E-band frequencies was initiated by microwave signal transmission experts. Emerging applications for automotive radar from 76 to 81 GHz, plus the WiGig extension IEEE 802.11ay operating up to 71 GHz, highlighted the need for a novel, robust coaxial cable connector suitable for industrial applications at frequencies up to 90 GHz.

The result was a 1.35 mm E connector, with a precise metric fine thread, a reliable pin-gap, and an integrated groove for optional push-pull locking.

Now, Rohde & Schwarz has implemented the E connector in a test and measurement instrument.

Suitable performance

The E connector closes the gap between the 1.85 mm connector (the V-band connector) and the 1.00 mm connector (the W-band connector). The V-band connector is robust for industrial applications but restricted to a maximum frequency of 70 GHz. The W-band connector, on the other hand, supports a maximum frequency of 110 GHz, but requires a fine-mechanical accuracy during assembly and frequently loosens in use.

Daniel Blaschke, head of development for RF & Microwave Power Meters at Rohde & Schwarz, says: “Power sensors are often the first T&M instruments for which customers request native support of a new connector type. We are happy to be the first to introduce a model equipped with the novel E connector.”

Dr Hans-Ulrich Nickel, head of RF Research & Development at the SPINNER Group, comments: “We initiated the 1.35 mm project to obtain a robust and future-oriented interface solution up to 90 GHz. It fills me with great joy to see the rapid adoption of our 1.35 mm portfolio.”

Hauke Schütt, Executive Vice President Test & Measurement from Rosenberger, adds: “The new 1.35 mm connectors draw a lot of interest in the 70 to 90 GHz range. We are excited that we are already able to offer a wide range of solutions.”

Dr Karsten Kuhlmann, head of the working group High-Frequency Basic Quantities at PTB, says: “International standardization and traceability to national standards are key ingredients for the successful introduction of a new RF connector system.”


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