French RIS Module Passes Test in a Win for 6G Research

September 7, 2023

Written by Caio Castro
CATEGORY: Exclusives
TAGS: 6G, 5G, research, RIS

French startup Greenerwave had its RIS (Reconfigurable Intelligent Surface) performance confirmed in a real-life test. Measurement company Rohde & Schwarz was able to verify that the device enhanced wireless communications capabilities, particularly in 5G FR2 implementations (above 24.25 GHz).

According to Rohde & Schwarz, the module covers a bandwidth of 25-30 GHz with an instantaneous bandwidth of 2 GHz. It comes with separate polarisation control, beam scanning from -60 to 60 degrees, and a beam width as narrow as three degrees.

The test required an environment illuminated from different incident angles while simultaneously measuring signals at multiple angles. A wireless performance test chamber from Rohde & Schwarz was used for over-the-air measurements. A holder was specifically designed for the feed antenna illuminating the Greenerwave RIS.

During the measurement campaigns, Rohde & Schwarz investigated the RIS reflection characteristics and reflection quality in the test chamber for modulated 5G signals in the millimetre-wave frequency range.

The 3D reflection characteristic measurements were performed with the R&S ZVA vector network analyser, and the 5G signal reflection quality measurements used the R&S SMW200A vector signal generator and R&S FSW signal and spectrum analyser. R&S AMS32 software was used to automate measurement and data analysis.

Even though the focus of this test was 5G, both companies believe the outcome will play a role in enabling 6G networks. RIS is frequently considered an important part of the next generation of mobile connectivity.

“Our combined research efforts will chart the course for further advancements in 6G, as we continue to explore innovative solutions to meet the evolving needs of the wireless industry,” said Alexander Pabst, Vice President of Market Segment Wireless Communications at Rohde & Schwarz.

Featured image by Rohde & Schwarz

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