RCO for wireless communications systems

This paper describes the design approach of RCO (reconfigurable concurrent oscillator), which simultaneously generates two or more signals of different frequencies or combination of them 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 -135 dBc/Hz, and 422 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>2; n=4 for dual mode).