Title :
A low phase noise 19 GHz-band VCO using two different frequency resonators
Author :
Hamano, S. ; Kawakami, K. ; Takagi, T.
Author_Institution :
Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A low phase noise 19 GHz-band VCO is presented in this paper. The VCO has a novel tuning circuit consisting of two resonators which have a different resonant frequency. With these two resonators, the Q factor of the tuning circuit of the VCO is improved, and low phase noise can be achieved. The measurement results of the developed VCO show phase noise from -120 dBc/Hz to -122 dBc/Hz at 1 MHz from the carrier over a 290 MHz tuning bandwidth in the 19 GHz-band. This VCO achieves one of the lowest recorded values of phase noise at K-band.
Keywords :
Q-factor; circuit noise; circuit tuning; harmonic oscillators (circuits); microstrip resonators; microwave oscillators; phase noise; voltage-controlled oscillators; 19 GHz; 290 MHz; HFET active device; K-band VCO; Q factor; frequency resonators; half-wavelength microstrip open circuited stub; harmonic VCO; low phase noise 19 GHz-band VCO; resonant frequency; tuning bandwidth; tuning circuit; Bandwidth; Circuit optimization; K-band; Noise measurement; Phase measurement; Phase noise; Q factor; RLC circuits; Resonant frequency; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210598
