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Ultra low noise signal synthesis for the use in a FMCW MIMO radar system

: Hasenaecker, G.; Storch, R.; Musch, T.; Pohl, N.


IEEE ; Institute of Electrical and Electronics Engineers -IEEE-:
IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2014. Proceedings : 3-9 August 2014, Palm Beach
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4673-5690-9 (Print)
ISBN: 978-1-4673-5692-3
Topical Conference on Antennas and Propagation in Wireless Communications (APWC) <4, 2014, Palm Beach>
Fraunhofer FHR ()

A great number of spatially distributed transceiver chips within multiple-input multiple-output radar systems make the reference signal synthesis as well as its distribution to an emerging topic. Therefore, we introduce a synthesizer based on the concept of fractional-N division which is able to provide a linear frequency ramp around 200 MHz. Furthermore, an ultra wideband phase-locked loop (PLL) is presented using this synthesizer and featuring a bandwidth of 22 GHz centred around 85 GHz. For stabilizing the PLL over the complete bandwidth a passive auxiliary circuit has been developed. The system achieves a phase noise below -78 dBc/Hz at 10kHz offset over its complete bandwidth.