Concurrent Oscillators For Multi-Band Multi-Mode Wireless Communication Systems

This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate the need of lossy switches for switching the frequency band, thereby improves the system throughput. The measured phase noise for band#1 (2.3-2.6 GHz) and band#2 (4.6-5.2 GHz) are typically -140 dBc/Hz, and -120 dBc/Hz at 100 kHz offset from the carrier respectively; and to our knowledge, this is the best phase noise performance for this class of VCO (voltage controlled oscillators) by using n^th-order MCPR (multi-coupled planar resonators) so far reported (n=4 for dual mode).