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When testing, as well as selecting the right test equipment to do the task efficiently and effectively, it is just as important for the adaptors and cables used to connect to the device under test (DUT) to be equipped and suitable for the job, with minimum loss and secure connections. They also need to be rugged and adaptable for testing a variety of applications, such as telecommunications, data systems, medical electronics, industrial electronics, test and measurement, aerospace and automotive electronics.

With these requirements in mind, Rosenberger has revised and expanded its product range of high-quality, ruggedized test port adaptors for vector network analyzer (VNA) test applications, to provide the connection required when using network analyzers with various test devices and equipment. The product range now covers RPC-3.50, RPC-2.92, RPC-2.40 and RPC-1.85 in-series and inter-series test port adaptors for frequencies up to 70 GHz. Inter-series adaptors RPC-3.50, RPC-2.92 and RPC-2.40 to RPC-N and RPC-7 are also available.


Of particular importance is the ruggedized construction of the adaptors, reducing mechanical abrasion to a minimum and ensuring reliable protection of VNA test ports. Designed to connect directly with a ruggedized coupling nut to the VNA test port, these high-quality test port adaptors offer significant, practical features. For instance, they are usable for all common VNAs, offer reliable protection of VNA test ports and provide cost savings by reducing VNA down-time and minimizing repair costs. They are claimed to deliver excellent measurement performance due to restricted connection dimensions on the adaptor DUT side, as well as providing reliable measurements of solely the devices and not of the complete test setup.

Figure 1 shows the typical insertion loss and return loss of these test port adaptors, illustrated by the RPC-3.50 female to male configuration. The female versions are mateable with all common VNA test ports and all common standard series. Similarly, the male versions are mateable with all common standard series, for example with ruggedized and non-ruggedized female connectors.

Figure 1

Figure 1 Typical insertion loss (a) and return loss (b) of a Rosenberger test port adaptor, illustrated by the RPC-3.50 female to male adapter.

Figure 2

Figure 2 RPC-3.50 test port adaptor, which operates to 18 or 26.5 GHz.


Taking each of the range of adaptors in turn, the RPC-3.50 test port adaptors (see Figure 2)—interface to IEC 60169-23—mate with APC-3.50, GPC-3.50, SMA, K and RPC-2.92 connectors. These test port adaptors operate to 18 or 26.5 GHz, with in-series and inter-series adaptors available, which are RPC-3.50 to RPC-N and RPC-7, respectively.

Figure 3

Figure 3 RPC-1.85 test port adaptor extends the frequency range to 70 GHz.

The RPC-2.92 test port adaptors—interface to IEC 61169-35—mate with APC-3.50, GPC-3.50, SMA, K and RPC-3.50 connectors and operate in the 18 or 40 GHz range. Again, in-series adaptors—RPC-2.92 to RPC-N—as well as inter-series adaptors—RPC-7—are available.

The RPC-2.40 test port adaptors—interface to IEC 61169-40—mate with APC-2.40, OS 50, HP-2.40 or RPC-1.85 and V connectors. These test port adaptors operate to 18, 40 or 50 GHz. Also available are in-series adaptors—RPC-2.40 to RPC-N and RPC-7—along with inter-series adaptors—RPC-2.92.

Extending the range to 70 GHz is the RPC-1.85 test port adaptor (shown in Figure 3)—interface to IEC 61169-32—that mate with V or RPC-2.40, APC-2.40, OS 50 and HP-2.40 connectors. They are available as in-series adaptors, female and male.

Rosenberger is certified to IATF 16949:2016, ISO 9001 and DIN EN 9100 and runs an accredited calibration laboratory in accordance with DIN EN ISO 17025 (DAkkS). Like all of the company’s products, the test port adapters are made to the highest standards.

Fridolfing, Germany