ROHDE & SCHWARZ ENABLES SUB-THZ ULTRA WIDEBAND SIGNAL ANALYSIS

Rohde & Schwarz is paving the way for research in the terahertz frequency range by demonstrating multi gigabit data transmission in the D-Band at 140 GHz. The setup features the R&S FSW high-end signal and spectrum analyzer equipped with an R&S FSW-B8001 option, supporting an unparalleled 8.3 GHz internal analysis bandwidth. This new hardware option will be available soon from Rohde & Schwarz.

ROHDE & SCHWARZ ENABLES SUB-THZ ULTRA WIDEBAND SIGNAL ANALYSIS

Developments in mobile technology are moving constantly towards increasing bandwidths, enabling increasingly high data throughput. The Rohde & Schwarz setup represents some of the first research exploring data transmission at sub-THz frequencies featuring ultra-wide bandwidths.

In the setup, a wideband-baseband signal is upconverted to the selectedΒ 140 GHzΒ frequency via aΒ R&S TC RSEΒ converter box. The world’s leading analog signal generator, theΒ R&SΒ SMA100B,Β provides the local oscillator frequency to the upconverter. The transmission is carried out over-the-air, with the converter connected to a horn antenna. The transmitted signal is received via another horn antenna and downconverted. TheΒ R&S FSWΒ featuring the new, uniqueΒ 8.3 GHzΒ bandwidth optionΒ R&SΒ FSW-B8001Β analyzes the signal, carrying out signal quality measurements such as error vector magnitude (EVM) to assess the performance of the transmission. Various common modulation formats are demonstrated. The new four-channel power supplyΒ R&SΒ NGP800Β by Rohde & Schwarz plays a vital role powering various parts and components in this setup.

Rohde & Schwarz supports starting research at THz frequencies

As wireless communications and sensing technologies are advancing, the need for higher bandwidths is becoming apparent. These developments push the frequency boundaries into the sub-THz and THz frequency range and, continuing the process started with 5G, make testing over-the-air (OTA) mandatory. At these frequencies, RF frontends become even more integrated, and their characterization in terms of signal quality (EVM) and out-of-band emission (ACLR, SEM, spurious) requires a flexible OTA test setup, covering a wide frequency range, from microwave and mmWave to sub-THz.

The proposed setup can easily be installed into theΒ R&SΒ ATS1000Β antenna test system. This enables design engineers to characterize RF frontend prototypes and reference designs intended to be used in future devices that support cellular and non-cellular technologies and are using much wider bandwidths. For example,Β IEEE’s 802.11ayΒ standard allows channel bonding that creates a signal with more than 8 GHz of bandwidth already today. TheΒ R&S FSWΒ is currently the only signal and spectrum analyzer in the world supporting the needed bandwidth internally for such applications, significantly facilitating complex setups in R&D.

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