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Home Measures

Analysis of ultra-wideband sub-THz signals

By Contrôles Essais Mesures
April 29, 2020
in Measures
Reading time: 3 min
Rohde and Schwarz - Spectrum analyzer
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Rohde & Schwarz paves the way for research in the field of terahertz frequencies by demonstrating the possibility of transmitting data at rates of several gigabits in the D band to 140 GHz. The solution implements the high-end spectrum and signal analyzer R&S FSW, which, together with the R&S FSW-B8001 option, offers an internal analysis band with a width unmatched on the market of up to 8.3 GHz. This new hardware option will soon be available from Rohde & Schwarz.

The evolution of mobile communication technologies calls for a constant increase in bandwidths in order to obtain increasingly high data rates. Rohde & Schwarz offers one of the first solutions allowing researchers to explore the potential of data transmission at sub-THz frequencies, over ultra wide bandwidths.

The solution uses the R&S TC RSE converter box which transposes a wideband signal at the selected frequency of 140 GHz. The analog signal generator, R&S SMA100B, one of the best in the world, delivers the frequency of the local oscillator to the frequency converter. Transmission takes place over the air, the converter being connected to a horn antenna. The transmitted signal is received by another horn antenna and is converted by a frequency step-down. The R&S FSW, featuring 8.3 GHz bandwidth thanks to the new option unique to the market R&S FSW-B8001, analyzes the signal and performs signal quality measurements such as vector amplitude. error (EVM) to evaluate the performance of the transmission. The presented solution supports various common modulation formats. The four-channel power supply of the new R&S NGP800 range from Rohde & Schwarz also plays an essential role in supplying the various components of this system.

Rohde & Schwarz supports the launch of research in the field of THz frequencies

Advances in wireless communications and sensing technologies make it essential to have more bandwidths. These developments push the current frequency limits towards the sub-THz and THz frequency range, thus continuing the extension process initiated by 5G technologies. This requires the implementation of tests by air (OTA). At these frequencies, the integration of the RF front ends is even more advanced. Their characterization in terms of signal quality (EVM) and out-of-band emission (ACLR, SEM, interference) requires a flexible OTA test system, covering a wide range of frequencies, from the microwave and millimeter wave domains. up to sub-THz frequencies.

The proposed solution can be easily integrated into the R&S ATS1000 antenna test system. This allows design engineers to characterize RF front end prototypes and reference designs intended for use by future cellular and non-cellular communications equipment and operating at much wider bandwidths. For example, the IEEE 802.11ay standard allows channel aggregation which now offers the possibility of creating a signal with more than 8 GHz bandwidth. The R&S FSW is currently the only spectrum and signal analyzer on the market to have the necessary in-house bandwidth for such applications. This considerably facilitates the implementation of complex configurations in R&D.

“While Rohde & Schwarz meets the testing requirements of 5G technology, which is still being defined and deployed today, we are already exploring ways to develop the technology of tomorrow. This revolutionary D-band test solution is a milestone in research beyond 5G that will lead to the next generation of mobile technology, ”said Andreas Roessler, CTO at Rohde & Schwarz .

A demonstration of this solution in the chosen frequency range was to be carried out at the 6G Wireless Summit, organized by the University of Oulu in Levi, Finland. The summit will ultimately take place virtually.

Visit the site:
https://www.rohde-schwarz.com/_252786.html

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