Sierra Wireless selects innovative R&S ATS1800C test chamber with gold reflector for 5G NR FR2 testing

Leading IoT solutions provider Sierra Wireless has selected the compact antenna test range (CATR) based
R&S ATS1800C for mmWave frequencies (FR2) testing thanks to its class-leading characteristics. The
transportable solution from Rohde & Schwarz features a state-of-the-art golden CATR reflector with rolled
edges and a very smooth surface to minimize scattering and to provide precise measurement results as
required for operation at high frequencies.


Test and measurement is moving from conducted testing to over-the-air (OTA) testing, especially in 5G NR
due to the increased frequency range. One challenge of OTA testing is to maintain a compact test chamber
size while providing a large quiet zone (QZ), or useable measurement area, in a wide frequency range.
Rohde & Schwarz developed the R&S ATS1800C to combine all this, meeting current and upcoming
requirements for 5G NR OTA testing.
The R&S ATS1800C is a turnkey, high-end chamber with a small footprint of only 1.3 m2. Thanks to its
movable design, it is highly flexible and transportable, allowing the chamber to be easily moved from one lab
to another. The solution provides a large quiet zone of 30 cm, fulfilling 3GPP 5G NR conformance test
requirements. With its high shielding efficiency, the R&S ATS1800C is designed to provide a trouble-free
environment for uninterrupted measurements of 5G antennas, modules and devices.
A unique characteristic of the R&S ATS1800C is its state-of-the-art gold CATR reflector, transforming the
incoming spherical wave front to a plane wave. Manufacturing the reflector requires processes that are
accurate in the micrometer range. To achieve such high precision, Rohde & Schwarz has developed an
innovative manufacturing method, delivering high quality reflectors reproducibly.
The R&S ATS1800C supports the testing of devices weighing up to 8 kg, which makes it well suited for
testing a variety of active or passive DUTs, from small chip modules to tablets and laptop or even small cells.
Hardware triggering allows measurements during continuous movement of the high-precision 3D positioner,
which can reduce measurement time by a factor of 5 to 10.
Bill Seefeldt, Senior Vice President of Engineering at Sierra Wireless, commented: “As a wireless solutions
leader, we wanted to find a CATR based solution to ensure the best measurement quality and accuracy. We
were impressed with the OTA solutions Rohde & Schwarz offers, and we selected the R&S ATS1800C.
Sierra Wireless is a long-standing customer of Rohde & Schwarz.”
Alexander Pabst, Vice President of Systems and Projects at Rohde & Schwarz, added that “Rohde &
Schwarz is committed to providing top-of-the-line T&M solutions to our customers in the mobile
communications industry. We are pleased to provide Sierra Wireless with the unique, gold reflector version
of the R&S ATS1800C. We look forward to further cooperation with Sierra Wireless on cutting-edge wireless
communications technologies.”
For more information on the R&S ATS1800C, visit

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