A novel system for quasi-continuous THz signal transmission and receptionSarjaš, Andrej (Avtor) Pongrac, Blaž (Avtor) Gleich, Dušan (Avtor) quasi-continuousterahertzphotoconductive antennawave emittancewave detectionThis paper presents a novel system for generating and receiving quasi-continuous (QC) TeraHertz (THz) waves. A system design and theoretical foundation for QC-THz signal generation are presented. The proposed QC-THz system consists of commercially available photo-conductive antennas used for transmission and reception of THz waves and a custom-designed QC optical signal generator, which is based on a fast optical frequency sweep of a single telecom distributedfeedback laser diode and unbalanced optical fiber Michelson interferometer used for a high-frequency modulation. The theoretical model for the proposed system is presented and experimentally evaluated. The experimental results were compared to the state-of-the-art continuous-wave THz system. The comparison between the continuous-wave THz system and the proposed QC-THz system showed the ability to transmit and receive QC-THz waves up to 300 GHz. The upper-frequency limit is bounded by the length of the used Michelson interferometer. The presented design of THz signal generation has a potential for industrial application because it is cost-efficient and can be built using commercially available components.MDPI AG20222025-04-01 10:02:41Članek v reviji92353UDK: 621.39COBISS_ID: 112134659DOI: 10.3390/s22124448ISSN pri članku: 1424-8220sl© 2022 by the authors