Configurable adaptive ultra low noise wideband VCOs

The current diversity of available wireless services comes up with the necessity of multi-mode, multi-band, and multi-standard trans-receivers operating in several frequency bands, therefore, requiring a wideband source that may replace several narrow band voltage controlled oscillator (VCO) modules by a single low noise wideband VCO. The coupled resonators/oscillators design approach demonstrated in this work can satisfy the need for the present demand for low cost, low noise, power efficient, wide tuning range, compact size, and amenable for integration in chip form. The measured phase noise is better than -115 dBc/Hz at 100 kHz offset over the tuning range (1-4 GHz/4-8 GHz), and to our knowledge, this is the highest tuning band of operation using N-push topology with discrete components so far reported.

[1]  B. Razavi,et al.  A 900 MHz/1.8 GHz CMOS receiver for dual band applications , 1998, 1998 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, ISSCC. First Edition (Cat. No.98CH36156).

[2]  U.L. Rohde,et al.  Low noise low cost ultra wideband N-push VCO , 2005, IEEE MTT-S International Microwave Symposium Digest, 2005..

[3]  Frank Herzel,et al.  A new approach to fully integrated CMOS LC-oscillators with a very large tuning range , 2000, Proceedings of the IEEE 2000 Custom Integrated Circuits Conference (Cat. No.00CH37044).

[4]  Xudong Cao,et al.  Phase noise in coupled oscillators: theory and experiment , 1997 .

[5]  Georg Böck,et al.  The Design of Modern Microwave Oscillators for Wireless Applications : Theory and Optimization , 2005 .

[6]  M. Madihian.  A band selection/switching technique for multi-mode wireless front-end transceivers , 2001, Proceedings of the 2001 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. (Cat. No.01TH8568).

[7]  U.L. Rohde,et al.  Ultra low noise low cost multi octave band VCO , 2005, IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communication, 2005..

[8]  Hai Xiao,et al.  A low phase noise Ku band push-push oscillator using slot ring resonator , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[9]  K. O. Kenneth,et al.  Demonstration of a switched resonator concept in a dual-band monolithic CMOS LC-tuned VCO , 2001, Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169).