Digitally modulated signals to 40 GHz for 5G development

March 12, 2015 // By Graham Prophet
Rohde & Schwarz has added microwave frequency options to its R&S SMW200A high end vector signal generator to support development applications requiring complex multichannel scenarios up to 40 GHz. The instrument creates signals for radar and satellite applications as well as for future 5G technology development.

Three new options for the R&S SMW200A high end vector signal generator span microwave frequency ranges from 100 kHz to 12.75 GHz, 100 kHz to 31.8 GHz and 100 kHz to 40 GHz. An option covering the range between 100 kHz and 20 GHz has been available since the summer of 2014. The SMW200A is, says R&S, the only microwave signal generator to combine a baseband generator and RF generator with fading, AWGN and MIMO capabilities in a single box. As a result, it supports numerous challenging aerospace and defence and wireless communications applications.

The 40 GHz version of the R&S SMW200A enables users to completely cover the K and Ka bands. The generator's integrated baseband offers an RF modulation bandwidth of 160 MHz with excellent I/Q flatness and EVM, making it possible to generate signals of the highest modulation quality in the microwave range. It supports generating CW signals with multiple carriers for component tests and wideband QAM-modulated carriers for satellite receiver tests.

The R&S SMW200A is helping developers identify potential technologies for accessing 5G wireless networks. The new frequency options enable the instrument to cover the frequency ranges that are currently the focus of 5G development. Its internal baseband section can handle all important digital communications standard including LTE Releases 8 to 11. The signal bandwidth of the R&S SMW200A can reach 2 GHz when external I/Q signals are used.

Modulated, phase-coherent signals up to 40 GHz; beamforming applications are used to measure active antenna systems such as phased arrays. This requires high quality, phase coherent test signals. The LO coupling of the R&S SMW200A now makes it possible to set up a compact system with up to three phase coherent outputs up to 40 GHz. In addition to the R&S SMW200A, the setup employs two combinations of the R&S SGS100A and R&S SGU100A as additional RF paths up to 40 GHz. The additional signal sources can be