Novoa García, María Celeste

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Design of a low SWaP dual-band radiometer for UAS remote sensing applications
(2024-05-09) Novoa García, María Celeste; Rodríguez Solís, Rafael A.; College of Engineering; Medina Sánchez, Rafael H.; León Colón , Leyda V.; Department of Electrical and Computer Engineering; Amador Ramirez, Andre
This work presents the design of a dual-band (L/Ka) receiver for a Dicke radiometer to measure Sea surface salinity. The analog front-end was designed and characterized. The system noise figure was found to be 0.5118 dB, with a gain of 49.1235 dB and bandwidth of 136 MHz around 1.41 GHz, and the system noise figure was found to be 1.7815 dB, with a gain of 74 dB and bandwidth of 8 GHz around 31.5 GHz. The digital back-end was implemented on a ZYBO Z7 7020 platform. The digital receiver reads the voltages for the L-band and K-band detectors, and the system reference, performs the switching between bands and the reference signal for the Dicke operation, performs the integration, calculates the brightness temperature, and stores the brightness temperature data, along with the date, time, and position data, on an SD card.