Title :
A novel tuning concept for wideband VCOs based on a shunt-FET
Author :
Weber, Rainer ; Kallfass, Ingmar ; Seelmann-Eggebert, Matthias ; Leuther, Arnulf
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys. (IAF), Freiburg, Germany
Abstract :
A novel tuning concept for wideband voltage controlled oscillators based on a shunt-FET is presented in this paper. The concept is demonstrated in a fundamental W-Band VCO, operating at 91 GHz with a relative tuning bandwidth of 10 % and an output power of 3.0 plusmn 0.5 dBm. By laser-adjustment of the resonator line length the bandwidth can be increased up to 15.4 %. In this case an output power of -1.6 to 3.3 dBm has been obtained. The phase noise varies from -45.8 to -59.4 dBc/Hz at 100 kHz offset from the carrier frequency over the full tuning range.
Keywords :
HEMT integrated circuits; circuit tuning; field effect MIMIC; millimetre wave oscillators; phase noise; voltage-controlled oscillators; HEMT; W-band VCO; frequency 91 GHz; laser-adjustment; phase noise; resonator line length; shunt-FET; tuning; wideband VCO; wideband voltage controlled oscillators; Circuit optimization; FETs; Frequency; Gallium arsenide; HEMTs; Laser tuning; PHEMTs; Voltage-controlled oscillators; Wideband; mHEMTs;
Conference_Titel :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
