Development of the miloSAR Testbed for the One Kilogramme radioCamera SAR for Small Drones
| Autor: | A. Langman, Y. Abdul Gaffar, D. Jordan, P. Cheng, Michael Inggs |
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| Rok vydání: | 2019 |
| Předmět: |
Heterodyne
Synthetic aperture radar Computer science Local oscillator 020208 electrical & electronic engineering Testbed 0211 other engineering and technologies Polarimetry 02 engineering and technology Effective radiated power law.invention Direct-conversion receiver law Radar imaging 0202 electrical engineering electronic engineering information engineering Electronic engineering Waveform Flicker noise Radar 021101 geological & geomatics engineering DC bias |
| Zdroj: | 2019 IEEE Radar Conference (RadarConf). |
| DOI: | 10.1109/radar.2019.8835721 |
| Popis: | The radioCamera is a fully polarimetric, C-Band imaging radar (SAR) for sub 20 kg drones, under development by droneSAR (Pty) Ltd. While designing this 1 kg system, a number of unconventional FMCW architectures had to be explored in simulation and practice before committing to expensive RF and digital boards. The miloSAR is a low-cost and rapidly reconfigurable testbed radar, built from commercial off-the-shelf components in the 2400MHz band, developed to aid with refining the architecture for the radioCamera. The system differs from traditional homodyne FMCW radars which perform direct downconversion using a copy of the transmit waveform as the local oscillator (LO) for analogue dechirp. Heterodyne architectures inherently avoid the known issues of direct down-conversion receivers, namely, DC offset, LO self-mixing, and flicker noise. This paper provides an overview of the miloSAR and reports on initial SAR results achieving more than 500m range with 10mW radiated power. |
| Databáze: | OpenAIRE |
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