Design of FMCW radar transceiver at 24 GHz
Journal
IEEE Antennas and Propagation Society Symposium
Date Issued
2009-06
Author(s)
Abstract
Fig. 4 show the performance of circulator. Both the insertion losses S 21 and S 32 are ?3 dB at 24 GHz. The isolation all are lower than ?20 dB at 24GHz. The return losses S 11 and S 33 are lower than ?10 dB at 24 GHz. The active balun in cascade with the in-phase combiner as shown in Fig.2 successfully isolate the signal from port 1 to port3. The buffers effectively decrease the insertion loss and increase the isolation. Fig. 5 show the performance of VCO, which has about 4 GHz wide of tuning range, and the phase noise is lower than ?100 dBc/Hz at 1 MHz offset over all the operation frequency band. Since the cross-coupled complementary circuit has lower parasitic capacitance and the varactor size is large, the tuning range can be significantly increased and only 2.9 mW is consumed by the VCO.
SDGs
Type
conference paper