This work presents a feasibility study for a full-disk 90GHz radiometer designed to detect the radio emission of solar flares. First flare radiation mechanisms are introduced, this dealing to both the science requirements and the system design. The instrument architecture is based on a 25cm dish antenna with f/D=0.6 and a 45 degrees offset of the feed. The receiver uses a direct amplification configuration with 8 dB noise figure, 50dB gain and 100 ppm gain stability. The target of 3sfu radiometric resolution for a 1s integration time is achieved with a 2GHz pre-detection bandwidth. In order to reduce size, mass and power consumption part of the millimeter-wave receiver can be implemented in a single silicon (Si) chip, i.e. exploiting the Sysyem-on-Chip (SoC) approach. As an example the 250nm SiGe BiCMOS process from IHP has been adopted. A three-stages 90GHz amplifier featuring 13dB gain and 9.4dB noise figure is proposed. This circuit can be used in the last stages of the amplification chain.
A System-on-Chip Millimeter-Wave Radiometer for the Space-Based Observation of Solar Flares
ALIMENTI, Federico;PALAZZARI, VALERIA;BATTISTINI, ANDREA;ALUIGI, LUCA;ROSELLI, Luca
2010
Abstract
This work presents a feasibility study for a full-disk 90GHz radiometer designed to detect the radio emission of solar flares. First flare radiation mechanisms are introduced, this dealing to both the science requirements and the system design. The instrument architecture is based on a 25cm dish antenna with f/D=0.6 and a 45 degrees offset of the feed. The receiver uses a direct amplification configuration with 8 dB noise figure, 50dB gain and 100 ppm gain stability. The target of 3sfu radiometric resolution for a 1s integration time is achieved with a 2GHz pre-detection bandwidth. In order to reduce size, mass and power consumption part of the millimeter-wave receiver can be implemented in a single silicon (Si) chip, i.e. exploiting the Sysyem-on-Chip (SoC) approach. As an example the 250nm SiGe BiCMOS process from IHP has been adopted. A three-stages 90GHz amplifier featuring 13dB gain and 9.4dB noise figure is proposed. This circuit can be used in the last stages of the amplification chain.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
