20.500.12556/RUL-165264 Radio front-end for frequency agile microwave photonic radars Recent advancements in photonic integrated circuits (PICs) have paved the way for a new era of frequency-agile coherent radar systems. Unlike traditional all-electronic RF radar techniques, fully photonic systems offer superior performance, overcoming bandwidth limitations and noise degradation when operating across S (2–4 GHz), X (8–12 GHz), and K-band (12–40 GHz) frequencies. They also exhibit excellent phase noise performance, even at frequencies exceeding 20 GHz. However, current state-of-the-art PICs still suffer from high processing losses in the optical domain, necessitating careful design of the electrical RF domain. This study delves into the critical challenges of designing RF front-ends for microwave photonic radars, including stability, noise minimization, and intermodulation distortion reduction. To demonstrate the feasibility of the proposed design, a functional prototype is constructed, achieving a total power gain of 107 dB (radar system at 10 GHz) while minimizing signal noise degradation. Furthermore, a comprehensive demonstration of the RF front-end, encompassing both optical RF signal generation and experimental measurements of a rotor blade’s Doppler fingerprint with 0.5 Hz resolution, validates the proposed system’s performance. microwave photonic radar photonic integrated circuit RF front-end mikrovalovni fotonski radar fotonska integrirana vezja radio-frekvenčna vhodna stopnja true false true Angleški jezik Slovenski jezik Članek v reviji 2024-11-28 15:04:38 2024-11-28 15:04:44 2024-11-29 03:52:15 0000-00-00 00:00:00 2024 0 0 16 str. iss. 23, art. 4662 Vol. 13 Dec.-1 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.396:621.38:621.3.049.77 2079-9292 10.3390/electronics13234662 216797955 electronics-13-04662.pdf electronics-13-04662.pdf 1 44F8DCC1C61A6BDDB97D637E33F9DD53 75dd358cd8be80e965f3181f551671dd7f818655aaf1c0a60a42316198c3c538 7b9b54ee-ad91-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=196337 https://www.mdpi.com/2079-9292/13/23/4662 1 50e6807b-ad91-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=196336 Fakulteta za elektrotehniko 0 0 0